ML052010508

Environmental Monitoring Program: 2002 - 2003 Report

ML052010508
Person / Time
Site:	Monticello
Issue date:	01/01/2004
From:	Xcel Energy
To:	Northern States Power Co, Office of Nuclear Reactor Regulation
Davis J, NRR/DRIP/RLEP, 415-3835
References
Download: ML052010508 (100)

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This is the thirty-first report (twenty-eighth operational) summarizing the environmental monitoring activities for the Monticello Nuclear Generating Plant (MNGP).

In 2002 and 2003 the fishery monitoring studies were conducted in accordance with the requirements of the NPDES Permit issued in 2002. Based on results of a data thinning analysis submitted to the Minnesota Pollution Control Agency (MPCA), the electrofishing frequency was reduced from eight to four times per year. The sampling was to be done in May, July, September, and October. By sampling at these times the data collected would not be statistically different from previous data. The seining study was not changed but the reporting requirement was changed to biennial reports with the Environmental Monitoring Reports due in even numbered years summarizing the two previous years data.

Because the Mississippi River near Monticello is a large, turbulent stream with a boulder substrate, many conventional fish sampling methods are impractical. Two techniques that have worked well for capturing specimens are electrofishing and seining. Large fishes are efficiently sampled by electrofishing while small species and young fish are captured by seining. The objective of the electrofishing and seining studies was to assess the relative abundance and seasonal distribution of fish in response to the plant discharge plume. Data collected in 2002 and 2003 were summarized and compared to previous years' data to illustrate any trends in fish abundance during the study period.

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MONTICELLO NUCLEAR GENERATING PLANT ENVIRONMENTAL MONITORING PROGRAM 2002 - 2003 BIENNIAL REPORT A

SUMMARY

OF THE 2002 - 2003 MONTICELLO ELECTROFISHING SURVEY Prepared by:

Xcel Energy Environmental Services I

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SUMMARY

OF THE '02-'03 MONTICELLO ELECTROFISHING SURVEY INTRODUCTION An electrofishing survey designed to assess relative abundance and seasonal distribution of fish in response to Monticello Nuclear Generating Plant's (MNGP) thermal discharge was conducted in 2002 and 2003. Study areas (Figure 1) were sampled four times each year in May, July, September, and October annually. Sector I encompasses an area of 21.6 ha and extends from the discharge structure upstream 1.7 km to the top of Cedar Island. Sector 2 extends 1.5 km downstream from the discharge structure to Boy Scout Rapids and includes an area of 21.7 ha. The thermal plume generally covers less than one-half of the area of Sector 2, (Figure 1) throughout most of the sampling period.

Percent composition, catch-per-effort (CPE), condition factors, and length-weight relationships were determined for predominant species in each sector. Comparisons of 2002 and 2003 data with 1968 through 2001 data were also made.

MATERIALS AND METHODS The methods and materials were the same as those from the recent surveys.

Statistical analysis of data thinning showed that sampling four times per season in May, June, September, and October would provide data that was not significantly different from the previous study methods. For data reduction purposes the four samples from the two study periods were treated as sample set. Data computation techniques were the same as previously, however tabulation and graphing were changed slightly to accommodate the new sampling frequency. Annual data are reported separately but the two years are combined for comparison to previous study data.

In 1997 and following years fish were collected using new electrofishing equipment; a Smith-RootSR-18 electrofishing boat equipped with a 5.0 GPP electrofishing unit (Figure 2). The power source was a 5.0 GPP 5000-watt generator with a maximum output of 16 amps, and a range of 0 - 1000 volts. The generator has the capability to be either pulsed DC or AC with pulse frequencies of 7.5, 15, 30, 60, and 120 Hz. The anode consists of two umbrella arrays, each with four dropper cables. The 18-foot boat and dropper cables, hung from the front of the boat, serve as the cathode.

Electrofisher output ranged from 336 to 540 volts, between four and six amps, and at pulse frequencies of 30 or 60 pulses per second.

Paired shocking runs were conducted along opposing shorelines during daylight hours as described in the 1975 report. Stunned fish were captured with one-inch mesh landing nets equipped with eight-foot fiberglass handles, and placed in holding basins until completion of each sampling run. Elapsed shocking time was recorded for each run by a clock, which tallied the seconds that the electrical field was energized. Fish were measured to the nearest millimeter and weighed to the nearest 10 grams.

I Species CPE was computed for both sectors on each sample date. Catch was determined for number (fish/hr.) and weight (kg/hr.) by dividing the total number and weight of fish collected per area by the elapsed shocking time for the area. Annual mean weight of selected fish species-was computed. Mean weight was calculated by dividing the CPE in kgfhr by the CPE in #fish/hr and multiplying by 1000 to convert to grams.

Fish were grouped into twenty-millimeter intervals, and mean total lengths and weights were computed for each group. Using these averages, condition factors were computed for the most abundant species with the formula:

K = W x1 05 where K is the condition factor, W is weight in grams, and L is total length in millimeters.

Individual fish measurements were used to compute length-weight relationships'for the dominant species. Data from both sectors were combined in this analysis. As with condition factors, all data were grouped and not segregated by sex. Metric measurements were transformed into logarithms, and simple linear regressions were computed. Length-weight formulas used to describe the data are presented in the following form' log W = log a + b log L, where W is the weight in grams, L is the total length in millimeters, a is the Y-axis intercept, and b is the slope of the length-weight regression line.

Fish species assemblages from the upstream and downstream sectors were analyzed and compared on the basis of species persistence and stability. The persistence value was computed from an index of species turnover rates (Meffe and Minkley, 1987). The formula T=(C+E)/(SI+S2) (where C and E are the number of taxa that appeared or disappeared between sample periods, and S1 and S2 are the numbers'of taxa present in each sample period) measures the rate of species turnover between two samples.

The mean turnover rate, for each assemblage, is then calculated from the individual turnover rates of all adjacent sampling periods. An index of persistence (PR) ranging from 0 or no persistence to 1 or complete'persistence was then calculated as 1-T. An index of 1, meaning no species change through the study period, would indicate a relative lack of disturbance to the system (Bass, 1990).

Stability of species relative abundance rankings was'tested by their concordance over the study period. Bass (1990) felt in a stable assemblage, species should maintain, or approximate, their rank of relative abundance over the study period. Species rank concordance was tested using the nonparametric Kendall's'W (Daniel,' 1978). 'Chi-square (x2) tests were employed to test the'significance of rank correlations. Species rankings were based on the species as listed on the data tables'including the seven most-common species and the composite 6toup of miscellaneous species or eight

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I parameters total. Bass (1990) felt that using only the most common species focused analysis on the ecologically dominant species.

Species abundance estimates were examined for the existence of trends using CPE data from all electrofishing events during the study period. The R2 value for the trend lines, as displayed on the figures, indicates most were not statistically significant The trend lines do however, indicate the similarity of data between the two sectors for a given fish species.

RESULTS A total of 2,536 fish was collected in the '02-'03 survey, 1,309 from Sector I and 1,227 from Sector 2. Species collected in the 1976 through 2003 surveys are presented in Table 1. Fifteen species from six families were collected in '02-'03. In all, 27 species from nine families have been identified during the MNGP electrofishing studies (Appendix A).

Percent contribution to total catch, by number, was computed for each major species from 1968 through 2003 (Table 2). Figures 3 through 5 depict the species percent contribution, to total catch, of the fish community in the study area. Sampling event; CPE statistics were computed by number (fish/hr.) and weight (kg/hr.) for each species (Tables 3 and 4 respectively). Comparisons of annual CPE are presented as fish/hr.

and kg/hr. in Tables 5 and 6, respectively. Average annual CPE for the study period is compared graphically in Figure 6 by species and total fish/hr. The '02-'03 fish-per-hour indices are also presented in graphic form as a visual comparison of seasonal abundance for the major species in this study area (Figures 7 through 14).

Length frequency distributions, in twenty-millimeter intervals, are presented in Figures 15 through 21 for the predominant species. The annual mean weight of selected fish species was calculated for each year of the study period. Annual mean weights by Sector are listed in Table 7. Trends in annual mean weight are compared, by species and Sector, in Figures 22 through 28. Condition factors of selected species were determined using the twenty-millimeter length intervals and are given in Table 8. A comparison of mean annual species condition is presented in Table 9. Table 10 lists the length-weight relationships computed for the predominant species.

Trends in annual CPE for each species by sector are graphed in Figures 29 through 35.

The R2 values for the trend lines are shown on the figures. Although the trend lines were not statistically significant, they do indicate a high degree of similarity between the' two sectors for most species.

Fish species assemblages from the upstream and downstream sectors were compared on the basis of persistence (PR) and stability (W) indices. Annual turnover rates (T) in Sector 1 ranged from 0.07 to 0.25 with a mean PR of 0.86 compared to a T of 0.15 and a PR of 0.85 for 2002-2003. In Sector 2 yearly T values ranged from 0.04 to 0.30 with

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a mean PR of 0.81 for the study period compared to a T of 0.11 and a PR of 0.89 for

2002-2003. Stability indices for Sector I and Sector 2 were W=0.831 and W=0.818, respectively with corresponding x2 values of 159.51 and 157.07. Both chi-square values are significant at P<0.001 indicating stable species assemblages.

Data on river flow are included in this section, for historical comparisons, because physical conditions can affect sampling efficiency. Tables 11 a 'and 11 b summarize, respectively, the 2002 and 2003 weekly averages of the water monitoring parameters including river flow, plant intake flow, river temperature, and discharge canal.

temperature and also lists the weekly average river flows for the period 1975 to 2003.

In Figures 37a and 37b the 2002 and 2003 weekly average flows are compared to the.

average flows for the study period.

DISCUSSION In 2002, mean annual Mississippi River flow was slightly below the annual average (Table 11 a). Mean'weekly flow was exceeded during nineteen weeks (Figure 36a) in 2002. The lowest weekly average in 2002 was 3,547 cfs during the week of June 16 (Table 11a). The highest weekly average flow occurred about one month later during the week of July 14 at 14,318 cfs following an unusually rainy late June. In contrast, the 2003 mean annual flow was only about 72% of the average annual flow for the study period. During 2003 mean weekly flow started the year low and continued low until mid-June (Figure 36b). The flow from mid-June through mid-July was unusually high (14,553 cfs during the last week of June) then dropped and stayed very low through the end of the year with the lowest weekly average flow of 1,945 during the last week of August. The unusually low river flows in late 2003 made it difficult or impossible to get to some areas that would normally be sampled.

Fifteen species from six families were collected and identified during 2002 and 2003 (Table 1). The dominant species (with greater than one percent of the total), in descending order of abundance, were (Figure 3): shorthead redhorse, silver redhorse, carp, smallmouth bass, channel catfish & northern hogsucker, white sucker, and walleye. Collectively, these species comprised 97 percent of the total catch. The remaining species in descending order of abundance, were: bigmouth buffalo, northern pike & rock bass, black crappie & bluegill, yellow perch and largemouth bass. Figures 4 and 5 display the species composition in Sectors 1 and 2, respectively. The two figures show the five predominant species have similar dominance rankings in both sectors and similar percent composition.

The annual average Sector 1 and 2 CPE is displayed, by species, in Figure 6. Total average fish/hr. in the two sectors has exhibited similar cycles during the study period however, Sector 21 CPE varies over a narrower range than does Sector 2 CPE. Total CPE in Sector 1 in 02-03 was 420.1 fish/hr. (Table 5) compared to an average of 400.8 fish/hr for the'study period. Total abundance in Sector 2 increased from 637.7 fish/hr.

in 00-01 to 653.3 fish/hr in 02-03. Catch per effort indices from both sectors were above the study period averages. Individual species catch varies annually but the total CPE appears most dependent upon the catch of shorthead and silver redhorse.

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Persistence (PR) and stability (W) indices for the two sectors indicate relatively stable species assemblages. Indices calculated from the twenty-eight years of data yielded mean PR values of 0.86 and 0.81 for upstream and downstream sectors respectively.

The most recent PR values were 0.85 and 0.89 and W values were 0.830 and 0.818 for Sectors 1 and 2, respectively.' Meffe and Minckley (1987), in their study of a small -

southwestern desert stream, reported PR values from 0.91 to 0.96 and W values from 0.63 to 0.83 for the different stream reaches. In Florida, Bass observed PR values ranging from 0.67 to 0.76 and W values from 0.59 to 0.79 in reaches of the Escambia-River. The indices calculated from this study are betwee I

Rivr. he ndies alclatd fom hisstuy ae btwen the ranges observed in the two cited studies.

Meffe and Minckley (1987) cautioned against using these indices as absolute measures of species stability, or equilibrium especially in river habitats where disturbance is a regular occurrence. 'The similarity of the upstream-and downstream values is probably the most notable inference to be made indicating comparable conditions above and below MNGP.

Figures 29 through 35 compare the trends of species abundance between Sector 1 and Sector 2. Trend lines for most species, even though-not significant, are nearly parallel indicating that although actual biomass is different, factors affecting abundance are influencing both sectors similarly. The exceptions are carp where upstream CPE is decreasing slightly while downstream CPE is increasing and northern hogsucker where the reverse is true (Figures 29 and 35).

Carp The 02-03 percent contribution of carp to the total catch (Table 2) decreased from 13.9 to 13.1 percent in Sector 1 and decreased from 13.2 to 10.4 percent in Sector 2 compared to 00-01 data. The abundance of carp was above average in both sectors in 02-03 (Table 5) and carp ranked third in abundance in both'sectors for that period.

Sector 1 mean annual carp abundance decreased from 62.7 fish/hr to 51.0 fish/hr between 00-01 and 02-03. Mean annual abundance in Sector 2 decreased from 84.0 fish/hr. to 64.8 fish/hr. for that period (Table 5).

Carp annual mean weight in 02-03 increased slightly upstream and decreased noticeably downstream compared to 00-01 data (Table 7). The number of carp per hour downstream decreased about 25% while the kg/hr decreased nearly 43%

indicating the presence of many small carp. The trend in carp annual mean weight appears to be increasing (Figure 22). Mean weight of upstream carp is consistently higher than downstream fish., Comparing.Tables 5 and 7 and Figure 15 indicate downstream carp tend to be smaller but more abundant indicating a probable attraction of the warm water to younger carp.

Mean condition factor for carp in 02-03 was 1.32 upstream and 1.27 downstream (Table 8) indicating a slight difference in fish condition between sectors again likely due

to the presence of numerous young carp in the discharge area. Table 9 lists the long-term averages for-Sectors I and 2 respectively at 1.29 and 1.30.

The length-weight relationship for carp in 02-03 was:

log W

-4.888 + 3.000 log L.

This relationship compares well with previous MNGP data. Similar regressions from' other North American studies of carp cited in Carlander (1969) ranged from:

log W = -3.982 + 2.664 log L to log W = -6.226 + 3.477 log L.

Shorthead redhorse Shorthead redhorse percent contribution increased slightly in Sector 1 in 02-03 but decreased in Sector 2. The annual percent contribution was 41.0 and 39.9 percent in Sectors I and 2 respectively. Mean annual abundance data (Table 5) decreased in Sector 2 from 298.1 fish/hr. in 00-01to 251.2 fish/hr. in 02-03 and in Sector 1 from 183.4 fish/hr. to 163.4 fish/hr. for the same period. Figure 8 illustrates the attraction of shorthead redhorse to the thermal plume during periods when ambient river temperatures are low. This attraction contributes to the fact that CPE is higher downstream. Both CPE values are slightly below the long-term average and follow the trend of higher CPE in the downstream sector.

Previous annual reports have noted most of the shorthead redhorse caught each year are similar in size and range between 410 and 490 millimeters (Figure 16). With the exception of a couple previous years the percent of fish in this range has comprised between 80 and 90 percent of the population. Again in this study period as in the previous three biennial study periods considerably more small fish were captured during 02-03 than in earlier years indicating better recruitment to the shorthead redhorse population the past six years.

Trends in annual mean weight (Figure 23) and monthly CPE (Figure 30) are increasing and nearly parallel between sectors. Annual mean weight is consistently higher upstream while monthly CPE is generally higher downstream again indicating a likely attraction of smaller, younger fish to the warm water.

Annual mean condition factor for shorthead redhorse was 1.01 and 1.00 for Sectors 1 and 2, respectively. This compares to a mean value of 1.06 in both sectors (Table 9).

The length-weight relationship for shorthead redhorse in 02-03 was:

log W = -5.207 + 3.085 log L.

This regressions cited in Carlander (1969) range from:

log W = -3.20 + 2.83 log L to log W

-4.042 + 3.021 log L.

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Silver redhorse The contribution to total catch by silver redhorse decreased in both Sectors in 02-03.

Sector 1 decreased from 26.2 to 24.4 percent while Sector 2 decreased from 20.7 to 19.2 percent, when compared to 00-01 data. Sector 1 abundance dropped from 118.2 fish/hr. in 00-01 to 117.2 fish/hr. in 02-03, while abundance in Sector 2 increased from 131.8 fish/hr. to 151.0 fish/hr. for that period. The average abundance for the study period was 121.5 and 171.8 fish/h. in Sectors I and 2, respectively (Table 5). As with most other species, monthly CPE (Figure 31) trend lines are parallel and appear to be, increasing.

Mean 02-03 condition factors for Sectors 1 and 2 were 1.04 and 1.11 respectively, indicating little difference in the condition of silver redhorse above and below MNGP.

The average of for both sectors is 1.11. Annual mean weights appear to be increasing although at slightly different rates in the two sectors (Figure 24).

Silver redhorse had a length-weight relationship of:

log W = -5.332 + 3.144 log L.

Carlander (1969) reported a similar formula:

log W =-4.263 + 3.124 log L.

White sucker White sucker comprised 2.6 percent of the total catch in Sector 1 and 0.9 percent in Sector 2 in 02-03. Catch-per-effort figures in Sector 1 were' 11.9 fish/hr. while 7.0 fish/hr. were caught in Sector 2 (Table 5). White sucker CPE values peaked in 1982 at 31.6 fish/hr. in both sectors,'declined through 1987, and have been somewhat variable although at a lower CPE since'1987. In 02-03 white sucker abunidance indices decreased slightly in both sectors from 00-01 values. The trend in white sucker CPE has been downward and similar in' both sectors (Figure 32).

Mean condition factors for white sucker in 02-03 were 1.1.1 'and 1.19 in Sectors 1 and 2 respectively. The study period average is 1.15 for Sector 1 and 1.16 for Sector 2.

Annual mean weight trends are increasing, but at different rates in the two sectors (Figure 25).

The length-weight regression for white sucker in 00-01 was:

log W = -5.084 + 3.055 log L.

The range of equations from other North American studies reported by Carlander (1969) was:

log W = -2.822 + 2.230 log L to log W = -5.395 + 3.223 log L.

Smallmouth bass Smallmouth bass percent composition increased from 6.8 to 8.7 percent of the catch in Sector I between 00-01 and 02-03. In Sector 2 smallmouth bass increased from 10.6 to 13.6 percent of the catch during the same period. The annual mean CPE data for Sectors 1 and 2 were 34.3 and 84.1 fish/hr., respectively. These figures are increased from 00-01 data and are above the long-term average in both sectors. The overall downstream CPE was elevated in part due to unusually high CPE values during the October 2002 sampling (Table 3). The trends in monthly smallmouth bass CPE (Figure 33) are similar with downstream abundance slightly higher than upstream'.

The length frequency'distribution for smallmouth bass depicted in Figure 19 indicates a fairly balanced population with smaller individuals present in both sectors although smaller fish are noticeably more abundant downstream. The mean weight of smallmouth bass increased in Sector 1 but decreased in Sector 2 compared to 00-01 data (Table 7). Overall annual mean weights have been increasing in both sectors (Figure 26) however upstream fish average nearly twice the weight of 'downstream fish (Table 7) indicating the attraction of the warm water to young smaller fish especially when the ambient rivertemperatures are low.

Mean annual condition factors for smallmouth bass were 1.33 and 1.22 in Sectors 1 and 2, respectively. The values represent a slight decrease in both sectors from 00-01 to 02-03 (Table 9). The long-term average condition factor is 1.41 for Sector 1 and 1.39 for Sector 2 indicating little difference between upstream and downstream fish.

The length-weight relationship for smallmouth bass was:

log W = -5.522 + 3.249 log L.

This formula falls within the range cited by Carlander (1969) which was:

log W = 4.177 + 2.701 log L to log W = -5.841 + 3.372 log L.

Walleye The contribution of walleye to the overall catch in 02-03 increased in both sectors compared to 00-01 data. Abundance figures were 4.8 fish/hr. and 5.8 fish/hr. for Sectors I and 2 respectively, in 02-03.. Walleye abundance was above average in both sectors in 02-03. Monthly CPE trends are nearly identical for both sectors (Figure 34).

Walleye is the only species where annual mean weight is generally higher downstream-than upstream (Figure 27).

The length-weight equation calculated for walleye in 00-01 was:

Jl Log W

-5.724 + 3.239 Log L compared with the relationship for Wisconsin walleyes cited in Becker 1983 which was:

Log W = -5.359 + 3.216 Log L.

Northeem hogsucker The contribution to total catch by northern hogsucker increased in both sectors in 02-

03. Sector 1 contribution went from 2.4 percent in 00-01 to 4.6 percent in 02-03. In Sector 2 the percent contribution increased from 1.8 percent in 00-01 to 4.4 percent in 02-03.

In 02-03 northern hogsucker were collected at the rate of 19.9 fish/hr. in Sector 1 and 27.8 fish/hr. in Sector 2 compared to 10.7 fish/hr. and 11.2 fish/hr. in those sectors in 01-02. The population of northern hogsucker in this area appears to have stabilized in both sectors following the rapid expansion after they were first observed in 1976.

Sector 1 abundance has fluctuated over the years but has been relatively stable the past few years. Northern hogsucker abundance expanded more rapidly in Sector 2 where abundance peaked at five times the Sector 1 abundance in 1985. The population of northern hogsucker exploded in the downstream sector peaking at over 110 fish/hr. then fluctuated greatly the following years. The 02-03 abundance was above average in Sector I and below average in Sector 2 Mean annual condition factor in 02-03 was 1.14 in both sectors compared to 1.10 upstream and 1.06 downstream in 00-01.' Both sectors are below the study averages of 1.19 and 1.21 for upstream and downstream, respectively.

The 00-01 length-weight regression computed for northern hogsucker was:

log W = -5.391 + 3.176 log L.

The range reported in Carlander (1977) was:

log W = -4.697 +.2.902 log L to log W = -4.960 + 2.980 log L.

Channel catfish Channel catfish were the fifth most abundant species in Sector 2 in 02-03. They were first collected in 1988 and have been observed in both sectors annually since then;.

Channel catfish comprised 2.7 percent of the catch upstream and 5.6 percent of the

catch downstream in 02-03. Upstream catfish abundance was 11.2 fish/hr. (Table 5) while downstream abundance was 34.3 fish/hr. Figure 21 depicts a wide range of lengths of catfish present. Table 7 shows the increase in annual average fish weight 1'

appears to have peaked and begun to decrease. Upstream catfish appear to be slightly larger than downstream fish on average.-

Annual mean weight and monthly CPE trends were not developed for channel catfish because of the short time they have been included in electrofishing collections.

Miscellaneous species In 02-03 the percent contribution of miscellaneous species to the catch decreased in Sector 1 compared to 00-01 and increased in Sector 2. Miscellaneous species percentage has been lower in recent years in part due to the removal of channel catfish from the miscellaneous category. This year miscellaneous species contributed 1.5 percent to the upstream catch and 4.4 percent to the downstream catch. The 02-03 catch rates for this group of species were 6.4 fish/hr. upstream and 27.3 fish/hr.

downstream of MNGP compared to 8.8 fish/hr. and 10.6 fish/hr. respectively, in 00-01 (without channel catfish).

Seven species comprised the miscellaneous category in 02-03. These species and the numbers collected were: bigmouth buffalo (40), northern pike (8), rock bass (8), bluegill (4) black crappie (4), yellow perch (3) and largemouth bass (1). Black crappie, largemouth bass, and bluegill were captured downstream' only while yellow perch were collected upstream only. In the past we would catch one or two bigmouth buffalo per year however in 02-03 we encountered bigmouth buffalo in the downstream sector during every sampling event.

Species which have been collected in previous electrofishing surveys but not caught in 02-03 were: bowfin, cisco, muskellunge, greater redhorse, flathead catfish, black, yellow, and brown bullhead, burbot, white crappie, pumpkinseed, and green sunfish.

As with other forms of fisheries sampling gear (e.g. trap net, gill net, and seine),-

electrofishing is size selective. The species that comprise MNGP's miscellaneous category may be more abundant than is suggested by the relative CPE data.

SUMMARY

1. The 02-03 electrofishing survey was conducted with a pulsed 'DC unit at approximately eight-week intervals starting May 24 and ending October 14, 2002 and from May 28 to October 27 2003. Energized shocking time was used to*

calculate catch-per-effort data.

2. A total of, 2,536 fish was collected comprised of fifteen species from six families.

Twenty-seven species from nine families have been identified from the study area since 1976.

3. Sector 1 had the following dominance ranking: shorthead redhorse, silver redhorse, carp, smallmouth bass, northern hogsucker, channel catfish, white sucker, walleye, northern pike, bigmouth buffalo, yellow perch, and rock bass.

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4. Sector 2 dominance ranking was: shorthead redhorse, silver redhorse, smallmouth bass, carp, channel catfish, northern hogsucker, bigmouth buffalo, walleye, white) sucker, rock bass, bluegill and black crappie, northern pike and largemouth bass.

5. Total CPE values were lower in the upstream sector and higher downstream in 02-03 compared to 00-01 but both were above the respective average catch rates for the study period.

6. Trends in monthly CPE were compared by sector for selected species Sector trend lines for most species were nearly parallel with the downstream abundance being somewhat higher than upstream abundance for all species except for white sucker.

7. Persistence and stability indices for the species assemblages in the two sectors are similar and indicate stable and persistent populations.

8. Condition factors were computed for seven species. Comparison of these data showed good correspondence between sectors for all species in 02-03 data and with the study averages.

9. Sector annual mean weight trends were compared for, the most abundant species.

Trend lines were either parallel or in the same direction for all species. Annual mean weight appeared to be higher, except for walleye, for.upstream fish.

10. Combining monthly CPE data with annual mean weight data indicates that, in general, smaller fish occur in higher densities downstream while lower densities of larger fish appear upstream. Smaller, younger fish appear to be attracted to the warm water discharge.

11. Length-weight relationships computed for selected species compared well with the regressions reported by Carlander (1969 and 1977).

LITERATURE CITED Bass, D.G. Jr. 1990. Stability and persistence of fish assemblages in the Escambia River, Florida. Rivers 1 (4):296-306.

Becker, G.W. 1983. Fishes of Wisconsin. University of Wisconsin Press, Madison, Wisconsin.

Carlander, K.D. 1969. Handbook of Freshwater Fishery Biology, Volume 1, 752 p. The Iowa State University Press, Ames, Iowa.

Carlander, K.D. 1977. Handbook of Freshwater Fishery Biology, Volume 2, 752 p. The Iowa State University Press, Ames, Iowa.

Daniel, W.W. 1978. Applied Nonparametric Statistics. Houghton Mifflin Company, Boston MA. 414 pp.

-i Meffe, G.K. and W.L. Minckley. 1987. Persistence and stability of fish and invertebrate

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assemblages in a repeatedly disturbed Sonoran Desert stream. American Midland Naturalist 11 7(l):177-1 91.

Scott, W.B. and E.J. Crossman. 1973. Freshwater Fishes of Canada, Bull. 184 Fisheries Research Board of Canada, Ottawa. 966 p.

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FL-A.NT SITE COOLING TcqESzZ DIS~aAkGz_

CANAL o

0.5 lcio~eters BOAm B Vklz ISLAND OXBOW ISLANDl MOM SI--I PARK Sector 1 Sector 2 Ficure 1.

gu Electrofishing Study Area.

i.

2

• Figure 2. Electrofishing Boat

Ffgure 3 Overall fish Catch Shorthead redhorse 39%

Channel catfish 4%

II.

Miscellaneous 3%A Northern hogsucker

.4%

Walleye.

1%t Smatimouth bass 10%

White sucker 2%

Fiv're 4 Sector 1 Fish Catch Shorthead redhorse

.. 38%

X.I.

Channel catfish 3%

Miscellaneous 2%

Northern hogsucker 5%

Walleye 1%

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I Smallmouth bass 8%

Silver redhorse 28%

White sucker 3%

f

Figure 5 Sector 2 Fish Catch Shorlhead redhorse 39%

II Channel catfish 5%.

Miscellaneous 4%

Northern hogsucker I

4%

Silver redhorse 23%

Smallmouth bass 13%

Carp 10%

Fiue6 Figure 6.

Monticello Electrofishing CPE by Sector Sector 1 Annual CPE 1000 900 800 700 600 Z

500 400 300 200 100 0

r 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 96/97 00/01 I

• Carp UShorhead Redhtorse

,U Silver Recftrse W~rts Sucker U swmallrouUm Bass eWalleye I

-Norftrm Nogmicker tliChannel Caftih x Misc.

1 I f Sector 2 Annual CPE 1000 900 800 700 600 400 300 200

• 100 0

1976 1978 1980 1982 1984 1986 1988 1990 1992

• -1994 96/97 00101

[

Figure 7 2002-2003 Monticello Electrofishing CPE Carp 160 -

l Upstream

+

Downstream l 140 -

120 -

100 I

O a

830 60 40 20 5/24/02 7/30/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 Date

Figure 8 2002-2003 Monticello Electrofishing CPE Shorthead redhorse 700 I -s Upstream - - + -

Downstream I 600 500 400 1.

L.

+

'II I

II 300 -

IF

• ~0+

C

.0 5

4 I

200 100 -

I 4 0 55 5,,

0 5/24/02 7/30/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 Date

Figur. 9 2002-2003 Monticello Electrofishing CPE Silver redhorse 500 4

l a Upstream - - + - -Downstream 450 -

400 350 300 Io i 250 IEI 200 150 100 50 0*

5/24/02 7/30/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 Date

Filre6 10 2002-2003 Monticello Electrofishing CPE White sucker 25

---a-Upstream

- Downstreaml A

20 15 lo

A 10 I

5

.,,!2A S.

SI,,

S S

5/24/02 7/30/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 Date

Figure 1 1 2002-2003 Monticello Electrofishing CPE Smallmouth bass 400

-a-Upstream

+ - -Downstream 350 300 250 L-i200 C

150 100

50. -

0*

I I

I I

II I

II II I

I I

I I

I I

III

.+111 5/24/02 7/30/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 Date

Figure 12 2002-2003 Monticello Electrofishing CPE Walleye 45 Upstream - - + - -Downstream 40 -"+

35 30

,25 U.

+

20 15 10 5+

0

+

U I

U 5/24/02 7/30/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 Date

Figure1 3 2002-2003 Monticello Electrofishing CPE Northern hogsucker 120 100 80 C)60 1

X 40 20 0

5/24/02 7/30/02 9/17/02 i 0/14/02 5/28/03 7/30/03 929/2003 10/27/03 Date

L__

Fiv.

1e 14 2002-2003 Monticello Electrofishing CPE Channel catfish 120 100 -

80 I --

Upstream - -

- -Downstream l A

I II I

I I

I I

L-L 60 II I

40 20 0

I I

/

I I5 A

A..

II.A, A

S.

I I

I I

0 I

I

'A II I

% 'M 5/24/02 7/30/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 Date

Figure 15 2002-2003 Monticello Electrofishing Length Frequency Carp 25 20 -

15 -

I lI Upstream l

0 Downstream 19 17 15 M

I 00

)

LL 10 -

12:

0' 10 8'~

5 6

1 6

0*

1 3

3 1i~I 5

I 5

5 5

I

)6 14 L

10 L

13 a

IA 9

L.-

13 I.

22 1

1 1 1 Z

l rn, LSa pa

=

rAfA

,~t--~A 250 270 290 310 330 350 370 390 410 430 450 470 490 510 530 550 570 590 610 630 650 670 690 710 730 750 770 Length (mm)

2002-2003 Monticello Electrofishing Length Frequency Shorthead redhorse 160 140 -

120 100

[I Upstream l Downstreaml 127 110 C,

C:

0) 03 Ea) 83 80 60 40 4515 MI' 20 -

32 16 17 2C 12j 98 :

36 S,,

PA 35 52 27

. 22 6

165 l

i 1

1

,0 150 -170 190 210 230 250 270 290 310 330.350 370 390 410 430 450 470 490 510 530 550 570 Length (mm)

I

FigUure 17 2002-2003 Monticello Electrofishing Length Frequency Silver redhorse 100 90 -

80 70 60 R2 psream 0 Dowstreamj 57 C) a)

I

)

IL 50 52 40 -

30 -

27 io 45 20 10 -

0 3

14 11 2

12 687 9

5 5

~~4 3

p-I 3

S S

14 19 5

170 190 210 230 250 270 290 310 330 350 370 390 410 430 450 470. 490 510 Length (mm) 530 550 570 590

Figure 18 2002-2003'Monticello Electrofishing Length Frequency White sucker 12 l Upstream l

l Downstream 10 8

7 C

6 0) 2 1

4

0*

01t l

Is 110 130 150 170 190 210 230 250 270 290 310 330 350 370 390 410 430 450 470 490 510 Length (mm)

Figlte 19 2002-2003 Monticello Electrofishing Length Frequency.

Smallmouth bass 30 25 20 C:a)

C 15 a0a) 10 5

0 90 110 130 150 170 190 210 230 250 270 290, 310 330 350 370 390 410 430 450 470 490 510 I

Length (mm)

Figu.e 20 2002-2003 Monticello Electrofishing Length Frequency Northern hogsucker 16 14 -

12 10 l Upstream bDownstream 14 C:

a) a, L.

Li.

8 6-4.

2 0

1 2

2 2

2 IIRE 4 4 7

3 5

5 8

3 2

a 5

,1.

I

~I_

fsXAes!cCB~

130 150 170 190 210 230 250 270 290 310 Length (mm) 330 350 370 390 410 430k 450 470

FigUa,'21 2002-2003 Monticello Electrofishing Length Frequency Channel catfish 10 9

a)

U-210 250

- 290 330 370 410 450 490 530 570 610 650 690 730 770 830 Length (mm)

Fig-,e 22 Trend in Annual Mean Weight Carp 2500-2000 -

.3 15003

+ +

+

E

+

+

+

+

1000 -

+

+

+

500 Upstream R2 = 0.5635 Downstream R2 = 0.4136 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 96/97 00/01 l

0 Upstream

+

Downstream -

Upstream.

Downstream

Figure 23 Trend in Annual Mean Weight Shorthead redhorse 1200 1000 -

800 -

0 D0

+

a

+

+

E C,3 600 II 400 -

200 -

Upstream R2 0.5406 Downstream FR2 0.2785 0

l I

I I

I I

1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 96/97 00/01 0

o Upstream

+

Downstream -

Upstream

.Downstream

Figure 24 Trend in Annual Mean Weight Silver redhorse 1800 1600 1400 -

1200 -

Upstream R2 = 0.3815 Downstream R2 = 0.6301 a

+

W o

+

lb

+

+

cn E

i2 1000 800 3-

+

+

E I

I

-3

+

III 13 +

13 600 -

400 -

01

+

+

200 -

0 t

4 I

• I 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 96/97 00/01 L 0 Upstream

+

Downstream -

Upstream.

Downstream

l z Figu're'25 Trend in Annual Mean Weight White sucker I

1600 1400 1200 1000

+

ciE Cd I-800 I

600 -

400 200

+

0

+

+

+

Upstream R2=0.5511 Downstream Fl2 = 0.0062 0

I II II I

I I

I I

C I

1976 1978 1980 1982 1984 1986 1988 1990.

1992 1994 96/97 00/01 0

o Upstream

+

Downstream -Upstream.

Downstream I

I--

I,

Fiu.re 26 Trend in Annual Mean Weight Smallmouth bass 600 500 400 -

EWE 300 -

200 -

100 0

Upstream R2 = 0.4309 Downstream R2 = 0.3388

+

03 0

03 El 03 03 1+

+

+

+

'';AD ++

++

03 0

03

+

0 03

+

+

r3 a

03 I

I I

I I-I I

I p

I I

i I

I P

I I

I 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 96/97 00/01 o

Upstream

+

Downstream -

Upstream.....

Downstream l

Figure 27 Trend in Annual Mean Weight 3000 2500 2000 an

.1 R 1500 (D

1000 500 0*

Waif eye 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 96/97 00/01 l

1 Upstream

+

Downstream -

Upstream Downstream

Figure 28 Trend in Annual Mean Weight Northern hogsucker 1000 13 WJ E

Wt O.

900 800 700 600 500 400 300 200 100 0

03 03 0

I 03 0

+

+

h cl o

+

0 I

I 0

. 1. J3 -'." "

03

+

+

Upstream R2 = 0.706 Downstream R2 = 0.5229

+

E 0

03 I

I I

S S

I I

I I

I I

I I

I I

I I

1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 96/97 00/01 1 ° Upstream

+

Downstream -Upstream Downstream

Figute 29 Trend in Monthly CPE by Sector Carp 300 250 200 Li.

~

150 II 100 50 0

1976 l

a Upstream

+

Downstream Upstream.-

Downstreaml 2003

Figure 30 Trend in Monthly CPE by Sector Shorthead redhorse 1200 Upstream R2 0.0388

+

Downstream R2 = 0.0251 1000 800

+

1

+

+

+

+

+

+

600 c

+

+

+

+

+

++

+

++

3

+

+

+

+

+3 0

+

400 -

+

+

0+

+

+

+43

+7 20030

+

0

+

+0 0

3

++

+

0+

++

O H-

++

E3

++%

+

+

+

+

+

0+0.

0 CL 3

4+-b-

[

200 0

E

-34t 0

+00+

t%

+3E31 u

-Jj-0 i,

0 n

+F 13~

~0I 00+/-

13

.3

+

I po M3 0

Eli 1976 2003 0 o Upstream

+

Downstream -

Upstream----- DownstreamI

Figuire 31 Trend in Monthly CPE by Sector Silver redhorse 700 Upstream R2 = 0.0251 Downstream A2 = 0.0043 600

+

+

500 -

+

+ +

+

+

400

+

+

+

03

+

0

+

03

+

U.

0

+

+

0+

300 -

+

0l

+

+

+

+

+

++

0

+ 3

+

0

+

+

q

+

+

0+0 3++

3

+o

+

0

+

4+

200 0.

+

0+

+

0 *+

+d

+

a a

a D+.Mn+ *

+3+-0

+

0+J:

1976

.T

-.2003f........

l 100

+

+T3E

+CCP 1

D13

+~

lb'Pr

+ 0

+-

+

0

+

13

+

03 0

0 1976 2003b13OP 0

Upstream

+

Downstream Upstream Downstream

Figure 32 Trend in Monthly CPE by Sector White sucker U-100 -

90 80 70 60 50 40 30 20 10 - to 1.76 1 976 I

l 0

Upstream

+

Downstream Upstream -.-.-.

Downstreaml 2003

Figurgi33' Trend in Monthly CPE by Sector Smallmouth bass 400 350 -

300 -

250 -

L.

I i

200-I is Upstream R2 = 0,0007 Downstream R2 = 0.0039

+

+

+

+

++

0

+

++

+

+

150 A

+

03

+

+

+

+

100-50

_+°

+

+

03 1

+

++

+ ++

p 0

03

+

0 0

1

+

0++

+

+

+,

+

+

03

+

r1.

+

+

i~~Di

+201 di, L.A; 2.A.......

qtd4

+t..

n. I

.1 1976

, I,,-....-,;.-

I 2003 l a Upstream

+ Downstream Upstream -

Downstream

Figure 34 Trend in Monthly CPE by Sector Walleye 100~

90 Upstream R =0.0402 Downstream R2 = 0.0107 80 70 60-i50 40

+

30

.+

+

+

20

+

+3

+

+

+

+

+ 1-10

+

+

.o

+°

+

+

+

3

+ + +

+

0 1976 2003 I o Upstream

+

Downstream Upstream -----

Downstream

Figure 35 Trend in Monthly CPE by Sector Northern hogsucker 200 -

+ +

180-

+

160 140

+

+

6E.

+

+..

80-

+

+

+

+

+

0

+

• +

++

+

+

+

+

4 3+

°l a++

60-

+0

+

a+

+a

,3 O*

+

+3 +

20 APO

+

+

0

.+

1 1

0-0+I+0 rp 0+1-03

• ~r=4

~LIo Li

+0 03 +

+ EbC3 0GO -P 1

+0 d3 13 Ir....

001 0

III II111*II*I, I

,sS I #It I Iit I I I IIII,,

II U

I I I t I I I I I I I I I II I 1981 2003 0

n Upstream

+

Downstream Upstream.

Downstream

Fi, a 36a Weekly Average Mississippi River Flow at Monticello 16,000

[m72002 14,000

-Av.1age 12,000 10,000 (LL. 8,000 6,000 4,000 2,000-0 1

3 5

7 9

11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 Week

Figurfe w6ob Weekly Average Mississippi River Flow at Monticello 18,000 1a72003 14,000 l

Average 12,000 10,000 U-8,000 6,000 4,0000 E

1 i i1

i11 I 1

3 5

7 9

11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 Week

Table 1. Monticello Eloctrolishing Species Ust. (After Bailey et. al. 1 970 Species 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 96197 98/99 00/01 02/03 Bowfin Cisco Northern pike Muskellunge Shorthead redhorse Silver redhorse Greater redhorse While sucker Blgmouth buffalo Northern hogsucker Carp Channel catfish Flathead caltish Black bullhead Yellow bullhead Brown bullhead Burbol Smallmouth bass Largemouth bass Rock bass Bluegill Black crapple White crapple Pumpkinseed Green sunlish Walleye Yellow perch x

x x

x x

x

'C C

'C

'C

'C

'C X

'C

'C

'C x

x x

x C

'C C

'C C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C x

x x

x x

'C

'C C

'C

'C C

'C

'C C

'C

'C x

'C

'C

'C 1 Ix C

'C

'C C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

• x

'C

'C x

xx x

x x

x x

x

'C

'C

'C

.'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C x

x x

x x

x

'C

'C

'C

'C C

'C

'C x

x'C x

x C

'C

'C

'C

'C x

x

'C

'C

'C C

'C C

'C

'C

'C C

'C C

'C

'C

'x

'C

'C

'C C

'C C

'C C

'C C

'C

'C

'C

'C

'C

'C

'C x

'C

'C

'C

'C

'C

'C

'C

'C

'C C

'C

'C

'C C

'C

'C x

'C

'C C

'C

'C

'C

'C

'C x

x

'C x

'C

'C x

x

'C x

x

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C

'C I

'C

'C

'C

'C

'C C

'C C

'C C

'C

'C

'C C

'C

'C Tolal specles 14 14 17 18 17 13 15 15 13 15 12 14 19 15 15 10 I16 is 15 14 15 19 14 is

Table 2. 1968-2003 Monticello Electrofishing Percent of Total Catch by Number.

Sector 1 1968 1969 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 96/97 98/99 00/01 1

02/03 MEAN Shorthead Silver Carp Redhorse Redhorse White Smallmouth Northern Channel Sucker Bass Walleye Hogsucker Catfish Misc.

50.7 29.4

.25.3 45.1 39.9 44.3 53.5 41.0 19.6 15.4 15.2 11.4 9.7 9.8 10.2 8.4 7.9 3.0 6.8 14.4 16.4 8.3 7.6 13.5 7.9 12.3 13.3 7.2 11.3 13.9 13.1 34.5 48.6 36.9 26.1 34.8 20.3 27.0 36.4 40.3 32.2 43.4 51.0 34.9 41.7 38.6 41.7 48.6 54.8 47.8 40.4 37.9 49.4 50.1 37.9 43.5 42.8 37.3 51.2 37.6 40.7 41.0 4.4 7.4 9.1 9.1 13.0 16.7 9.3 12.3 12.7 26.4 29.5 26.2 38.1 31.9 38.1 39.9 335 30.6 34.8 23.0 25.2 25.8 29.8 33.4 35.4 33.6 32.2 28.5 33.6 26.2 24.4 25.0 2.7 4.5 13.1 4.1 4.9 9.2 3.7 3.5 3.4 5.0 5.5 4.8 5.2 6.4 5.3 4.1 3.3 2.4 0.9 1.0 1.0 1.6 1.4 1.8 2.6 2.6 1.7 Z6 3.5 2.0 2.6 3.8 1.5 1.8 7.6 7.0 2.0 1.5 0.9 3.4 20.4 15.4 4.3 1.6 6.6 5.0 2.5 1.4 1.1 1.6 1.8 11.3 6.9 4.4 3.2 4.8 3.0 2.3 5.1 3.6 6.1 6.8 8.7 5.0 4.8 2.0 7.1 1.1 0.7 0.1 0.5 1.4 0.8 0.5 0.2 0.6 0.7 1.3 0.6 0.7 0.5 0.3 1.5 2.5 1.2 0.5 0.8 1.1 1.2 0.7 1.2 0.7 0.8 0.9 1.4 1.2 0.3 0.2 0.1 0.9 3.1 2.0 2.1 2.2 4.2 6.2 5.5 5.3 9.0 8.0 5.8 5.0 5.5 3.8 4.7 2.5 2.8 2.4 4.6 1.4 6.3 0.9 7.5 4.7 7.9 5.1 20 2.5 4.9 zo 3.5 1.7 20 2.6 24 0.8 1.1 0.9 2.0 0.9 1.4 0.1 1.0 0.6 0.9 1.0 0.7 1.2 2.0 1.5 0.1 1.5 0.6 1.2 1.6 0.4 1.0 3.5 3.0 3.1 5.1 2.7 18.9 40.3 3.7 2.0 24 Sector 2 1968 1969 1971 1972 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 198.4 1986 1986 1987 1988 1989 1990 1991

. 1992 1993 1994 1995 96197 98/99 00101 02/03 34.3 17.3 27.2 38.4 31.2 47.0 40.8 32.4 21.2 11.3 9.4 8.7 5.2 5.2 6.2 5.7 6.2 2.3 7.9 142 10.8 7.2 10.3 19.6 15.2 13.2 14.2 7.6 122 13.2 10.4 58.9 65.1 35.9 33.4 41.3 22.6 37.6 40.1 33.1 30.3 49.7 50.8 41.8 45.4 46.8 46.1 41.8 47.2 44.6 38.9 42.5 48.5 48.4 42.6 38.9 45.7 39.1 49.4 38.8 46.8 39.9 2.9 9.6 7.8 8.2 11.5 15.2 10.8 12.6 15.3 31.3 26.9 29.2 37.1 33.0 33.7 37.8 29.4 28.7 29.4 21.4 25.9 28.4 26.8 21.6 29.4 29.3 31.3 28.5 272 20.7 19.2 3.0 4.8 6.3 3.3 4.0 6.4 1.9 1.6 21 3.8 4.0 Z9 3.3 4.5 2.4 2.9 25 2.3 0.7 0.2 0.8 0.6 0.7 1.8 2.2 1.6 1.3 1.2 0.6 1.2 0.9 0.4 2.0 12.6 5.9 2.9 0.9 3.8 9.3 22.8 16.5 5.3 4.8 5.7 3.2 3.8 0.8 2.1 2.4 7.9 14.0 8.3 4.4 4.9 5.1 3.4 20 6.3 5.5 9.5 10.6 13.6 0.3 1.2 6.8 2.0 1.2 0.6 1.3 1.5 1.0 0.6 0.3 0.3 1.1 0.4 1.2 0.3 0.4 0.1 2.6 1.9 0.4 0.6 0.6 -

0.7 0.9 0.8 1.0 0.5 1.1 0.8 1.6 0.2 0.3 0.3 0.1 0.1 1.1 5.1 6.1 5.3 5.4 16.6

,16.4 5.7 5.9 0.7 10.2 0.4 7.6 2.2 7.0 0.6 4.6 3.5 8.4 0.9 5.7 1.2 4.9 1.7 4.0 2.8 4.3 4.9 1.8 3.5 4.4 5.6 0.3 0.4 3.4 8.8 7.9 6.4 3.6 2.2 4.3 6.1 4.4 2.2 0.7 2.3 0.6 1.4 1.0 0.6 1.2 2.8 0.7 0.5 0.5 0.5 0.8 0.5 0.2 0.4 1.5 1.7 4.4 MEAN 16.3 43.0 232 2.4 6.5 1.1 5.3.

2.3 2.3

-.U-Table 3. 2002-2003 Monticello Electrofishing Catch per Unit Effort by Number (fish/hr).-

II Shorthead Silver White Smallmouth Carp Redhorse Redhorse Sucker Bass Northern Walleye Hogsucker Channel Catfish Misc.

Total Sector 1 5124/02 7/30/02 9/17/02 10/14/02 5/28/03 7130/03 929/2003 10/27/03 31.3 82.5 51.4 15.8 70.7 94.5 49.4 6.6 127.3 148.0 203.1 285.9 96.6 135.3 235.4 69.2 212.2 17.9 152.8 9.7 133.1 9.3 38.3 9.0 195.5 9.4 104.7 20.4 34.2 11.4 0.0 6.6 472.8 21.5 84.0 4.4 131.2 0.0 130.5 5.0 286.9 9.0 192.6 9.2 21.7 10.9 17.0 0.0 24.6 38.8 70.0 24.8 18.8 25.5 30.4 42.8 37.6 44.2 159.9 366.5 31.4 27.5 21.7 30.6 0.0 4.9 2.3 11.3 7.1 2.6 11.4 0.0 5.0 0.0 0.0 402 4.5 0.0 7.2 20.4 24.6 17.0 28.0 9.0 23.6 17.9 34.2 6.6 16.1 22.1 53.3 95.4 31.4 9.2 7.2 3.4 11.2 2.4 30.4 2.3 11.8 5.1 22.8 6.6 96.7 8.8 45.1 45.2 35.9 18.3 43.4 0.0 6.7 455.6 2.4 458.5 11.7 539.3 9.0 405.3 9.4 442.9 0.0 406.0 3.8 432.9 6.6 144.9 5.4 1101.1 4.5 433.5 20.5 627.3 85.4 1385.8 40.3 632.1 32.1 646.6 18.1 343.7 17.0 397.7 1

F Sector 2 5/24/02 7130/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 69.9 35.4 82.0 35.1 31.4 146.8 65.1 54.4 376.1 230.0 135.3 582.4 161.4 211.0 148.3 255.0 Table 4. 2002-2003 Monticello Electrofishing Catch per Unit Effort by Weight (kglhr.).

Shorthead Silver White Smallmouth Carp Redhorse Redhorse Sucker Bass Northern Walleye Hogsucker Channel Catfish Sector 1 Misc.

Total 5/24/02 7/30/02 9/17/02 10/14/02 5/28/03 7/30/03 929/2003 10/27/03 90.2 202.8 108.3 49.9 160.1 140.7 124.6 13.8 113.8 314.4 19.7 141.2 244.0 9.1 208.3 155.7 9.2 292.9 54.0 9.4 85.6 287.1 11.1 129.2 156.8 17.7 258.2 61.4 11.4 76.6 0.0 3.6 268.9 693.0 17.4 213.7 136.8 3.9 132.0 192.8 0.0 453.7 174.8 4.3 116.7 437.1 6.5 196.8 339.7 6.7 141.4 32.1 11.0 197.1 20.3 0.0 14.7 20.9 24.3 11.3 11.6 17.7 14.7 24.5 24.0 13.8 19.8 80.5 24.0 17.9 8.3 12.7 0.0 6.2 0.1 0.9 2.2 0.4 2.2 0.0 82 0.0 0.0 10.5 22 0.0 8.1 15.0 132 8.4 17.3 5.6 15.5 13.9 30.8 4.9 8.4 1.9 60.3 8.6 26.7 8.7 53.0 1.0 26.5 600.8 0.9 635.4 9.2 592.9 0.5 433.1 4.9 604.7 0.0 485.1 19.8 576.1 11.9 136.3 II Sector 2 5/24/02 7t30/02 9/17/02 10/14/02 5/28/03 7130/03 929/2003 10/27/03 134.1 77.6 100.9 41.9 54.7 164.9 66.0 57.4 6.5 124.2 29.8 1306.1 10.3.

7.7 19.3-483.1 34.2 35.5 42.3 557.5 57.5 41.1 39.4 903.8 20.4 51.0 26.4 739.0 8.1 33.6 25.0 792.7 4.3 15.4 27.4 314.1 2.2 0.0 5.6 310.4 I

A Table 5. 1976-2003 Monticello Electofishing Catch per Effort by Number (fish/hr).

Carp Shorthead Silver Redhorse Redhorse White SmaIlmouth Sector 1 1976 11977 1978 1979

-1930 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 9"97 999 00101 02M3 67.4 61.3 51.6 493 38.0 44.8 47.5 45.1 33.8 34.0 142 21.1 53.6 66.0 33.2 35.1 68.3 37.6 50.5 42.3 33.0 52.1 62.7 51.0 59.9 126.1 108.1 140.9 168.7 167.5 207.3 1792 173.1 218.0 224.7 148.8 150.7 152Z1 197.2 231.9 192.0 206.1 177.0 118.4 2342 173.8 183.4 163.4 20.3 39.7 88.5 95.8 84.0 1732 155.0 170.5 155.6 148.1 142.4 108.5 85.s 101.0 102.9 137.6 169.0 167.9 147.0 102.0 1305 154.9 1182 1172 121.5 Sucker 5.8 10.5 16.6 17.9 16.1 25.1 31.6 24.4 16.6 14.4 10.3 2.7 3.8 3.8 6.6 6.3 9.0 12.3 11.3 5.4 11.8 16.1 9.1 11.9 Walleye Northern Channel Hogsucker Catfish Bass 5.7 63.6 51.7 13.9 53 31.1 24.2 11.4 5.9 4.7 6.1 5.5 42.0 27.6 17.6 15.0 24.1 14.0 9.3 16.1 16.5 28.3 30.8 34.3 2.4 2.4 1.7 0.5 2.3 3.3 6.2 2.8 2.7 2.3 1.2 4.7 9.2 5.0 2.1 3.9 5.8 5.6 2.8 3.9 32 3.7 4.3 4.8 12 0.7 0.3 3.4 14.3 9.6 9.3 9.5 17.8 262 172 19.8 36.1 32.1 26.8 252 26.0 16.0 14.9 11.5 13.1 10.7 19.9 Misc.

32 8.9 16.5 6A 11A 7.6 92 12.4 7.1 3.3 4.9 7.4 7.4 3.5 5.4 0.4 4.6 2.9 3.5 3.1 3.3 5.5 8.8 6.4 Total 164.7 313.7 335.4 325.0 3292 465.9 490.6 455.1 404.3 442.6 430.0 315.9 372.6 4012 399.5 4625 5063 4742 421.5 317.1

,457.8 461.8 450.8 420.1 0.3 6.1 2.4 5.5 8.3 1.8 4.1 11.0 13.8 14.3 22.8 112 MEAN 45.6 170.9 12.5 21.0 3.6 15.7 8.5 6.4 400.8 Sector 2 1976 1977 1978 1979 1980.

1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 9697 9899 0001 02J03 77.0 79.3 67.7 43.0 49.4 31.6 38.1 572 38.4 41.0 122 38.7 78.0 58.1 45.3 65.7 149.5 123.9 80.4 73.0 49.6 84.3 84.0 64.8 952 123.8 181.7 226.8 293.2 278.3 3302 457.5 309.4 2752 281.3 2172 213.6 228.9 304.4 307.8 324.7 316.6 287.6 201.5 320.3 269.1 298.1 2512 29.9 572 187.6 122.6 164.5 232.5 238.4 324.8 259.5 194.7 155.8 143.0 117.3 139.5 177.8 170.5 164.8 238.9 186.9 161.4 184.7 188.3 131.8 151.0 3.8 7.8 23.0 18.3 15.5 20.7 31.6 22.5 19.9 162 11.0 3.6 1.1 4.3 3.5 4.6 13.9 18.0 9.4 6.6 8.1 4.0 7.4 7.0 222 852 99.0 24.3 29.4 37.5 23.9 36.0 5.4 14.0 12.8 38.7 76.9 44.7 27.7 312 38.9 27.6 11.1 32A 35.8 65.8 S7.5 84.1 3.5 3.8 3.3 1.3 2.1 72 2.7 11.8 2.0 2.8 0.6 12.7 10.5 2.4 3.5 4.0 5.6

- 7.1 4.7 4.9 3.5 7.5 4.8 5.8 0.4 12 0.8 0.7 7.1 34A 43.7 49.6 35.9 110.4 87.6 28.0 3Z6 3.9 55.1 2.4 47.7 13.5 44.4 4.0 34.8 26.4 68.1 7.7 33.9 7.5 252 8.8 26.0 17.9 29.5 34.1 11.2

-22.3 27.8.

34.3 6.0 17.3 36.5 19.6 16.6 3.9 162 6.0 7.5 6.0 2.4 5.0 152 3.0 3.6 53 42 5.6 3.4 1.0 2A 1OA 10.6 27.3 238.0 375.6 599.6 456.6 577.8 646.1 724.8 965A 678.0 660.3 563.7

.486.9 649.1 538A 627.0 637.5 762.8 813.5 824.9 514.8 648.3 693.0 637.7 653.3 MEAN 63.8 266.4 171.8 11.7 40.5 4.9

. 34.8 152 9.8 611.4 I

Table 6. 1976-2003 Monticello aectrofishing Catch per Effort by Weight (kgihr.

Carp Shorthead Redhorse Sector 1 1976 1977 1978 1979 1980 1981 1982 1 983 1984 1985 1986 1987 1988 1 989 1990 1991 1992 '

1993 1994 1995 96/97 98/99 00/01 02)03 97.5 103.6 74.8 68.3 57.0 64.8 63.4 61.7 49.1 42.3 20.6 37.4 92.9 103.4 55.4 62.1 110.4 53.8 91.4 78.2 58.4 103.7 126.6 113.2 46.1 109.4 70.2 91.8 114.8 130.5 168.2 153.4 1542 1 86.0 185.3 132.3 137.0 114.5 155.1 179.1 158.3 179.7 169.5 118.0 216.3 167.3 183.2 162.6 Silver Redhorse 23.3 64.4 47.2 57.1 58.8 1272 110.6 134.7 141.5 141.5 125.4 1082 105.2 11.7 116.4 156.4 199.8 206.8 172.6 131.0 162.9 217.4 170.4 170.6 127.6 Sucker White Srnallmouth Walleye Northern Channel Hogsucker Catfish Bass 4.2 5.7 6.0 8.1 9.3 132 19.0 14.5 11.5 10.9 7.4 2.0 2.3 2.2 4.3 4.0 5.8 8.6 8.8 3.8 9.2 13.5 8.1 11.7 1.6 13.0 9.0 32 1.8 2.8 3.6 2.9 1.7 1.5 1.0 2.8 6.8 5.9 5.8 3.8 4.8 5.8 4.7 5.1 8.6 152 13.5 172 0.6 1.1

• 0.3 0.4 0.4 0.7 1.4 02 0.9 12 0.7 1.0 2.3 1.8 0.6 0.8 1.4 4.0 02 1.5 12 0.9 2.8 1.5 0.7 2.1 3.6 4.7 42 82 17.0 122 11.9 20.9 23.7 21.6 22.5 20.0 13.1 11.3 8.3 10.1 7.3 13.1 Misc.

1.7 4.6 3.9 5.6 4.2 7.5 8.5 26 1.8 4.4 9.3 1.1 4.1 3.7 6.5 1.1 5.1 6.9 52 32 4.5 4.1 7.3 8.8 Total 175.0 301.8 211.4 232.5 247.0 348.8 378.3 374.7 364.9 396.0 366.7 297.0 362.6 371.1 3692 434.9 5172 4882 471.4 371.7 498.4 561.9 560.4 519.0 0.1 6.0 1.4 6.0 9.1 2.6 5.9 19.6 29.0 29.8 412 20.3 MEAN 74.5 145.1 8.1

.5.9 12 11.8 142 4.8 384.2 I,

i Sector 2 1976 1 977 1978 1979 1980 1 981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 96/97 98/99 00/01 02/03 752 99.7 86.0 53,1 49.1 38.7 41.7 64.7 48.8 46.6 18.8 50.7 107.9 77.0 62.7 85.4 141.9 155.2 119.1 109.3 78.9 154.4 148.5 85.0 89.0 85.7 1062 145.5 196.9 206.1 2362 329.6 268.5 221.5 225.3 180.6 165.0 164.5 201.4 237.2 256.6 269.6 260.6 198.7 278.8 232.3 247.6 207.3 34.4 61.9 60.4 69.8 802 158.6 189.0 258.1 2412 175.4 135.7 136.8 136.3 171.5 185.0 190.6 196.7 289.0 221.9 206.4 234.9 272.9 189.6 229.3 2.9 11.7 7.0 7.9 92 13.9 16.7 12.6 13.3 11.8 8.0 2.7 1.0 1.4-1.7 2.1 10.2 13.4 6.0 5.1 6.3 3.5 6.1 5.8 4.5 15.6 17.4 6.0 9.6 8.6 4.1 9.3 1.4 3.5 2.4 7.5 12.0 10.9 7.8 8.8 9.7 9.6 6.3 9.4 10.4 232 30.1 23.4 1.4 2.1 2.6 0.6 0.9 1.9 1.4 6.3 0.4 3.7 1.5 4.8 2.4 0.6 12 3.0 24 3.7 1.9 3.7 2.8 3.3 2.2 5.8 2.0 9.0 14.8 24.3 18.3 48.4 52.0 16.7 19.9 2.5 31.1 3.0 30.1 13.0 35.0 42 32.6 24.4 47.5 10.1 25.1 7.7 18.6 14.1 20.0 28.3 202 54.8 6.1 22.4 16.9 34.6 1.4 Z5 6.0 7.6 4.2 5.0 9.6 2.0 10.1 8.8 6.9 6.3 5.4 3.4 32 4.4 7.7 7.1 52 2.1 0.4 15.5 19.9 26.0 208.8 2792 285.6 290.5 3521 441.8 513.5 706.9 602.0 519.7 450.6 406.1 452.4 463.4 506.1 570.7 6822 8052 653.8 567.4 660.8 780.1 672.5 834.1 I.

MEAN 83.3 208.8 171.9 7.5 10.5 2.5 24.4 18.3 7.1 521.1 I

I

)

Tabte 7.1976-2003 Average Weight (grn) of Fish by Spec Shorhead Carp Redhorse Sector 1 1976 1977 1978 1979 1 980 19B1 1982 l983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 9697 98/99 0001 Oz3 MEAN 1447 1690 1450 1345 1500 1446 1335 1368 1453 124S 1451 1773 1733 1567 1669 1769 1616 1431 1810 1849 1770 1992 2019 2220 1670 977 1257 1270 1235 994 1225 1094 1131 1271 1137 1541 1310 1383 1325 1384 1300 949 1253 1481 1497 1591 1831 1768 1312 770 868 649 652 680 779 811 856 891 853 825 889 909 753 787 772 824 872 958 997 924 962 999 995 des.

S~ver Redhorse 1148 1622 533 596 700 734 714 790 909 955 881 997 1226 1116 1131 1137 1182 1232 1174 1284 1248 1403 1442 1456 While Smrnallrouh Nortiem Channel Hocsucker Catfish 826 1014 Sucker 724 543 361 453 578 525 601 594 693 757 718 741 605 579 652 635 644 699 779 704 780 840 890 983 634.

763 1500 304 432 594 671 528 560 668 728 727 750 909 326 486 457 734 744 638 773 778 854 824 829 281 204 174 230 340 90 149 254 288 319 164 509 162 214 330 253 199 414 505 317 521 507 438 501 250 458 176 800 174 212 226 71 330 522 583 213 250 360 286 205 241 714 71 385 375 244 651 313 Bass Waneye 3033 167 830 206 147 375 505 442 461 649 709 601 579 738 806 893 769 819 758 722 770 682 658 MIsc 273 317 654 1683 740 935 531 517 236 875 368 987 924 210 254 1333 1898 149 830 554 984 1057 583 1204 1091 2750 1096 1109 1444 2379 1439 1486 1782 1032 2101 1364 2082 745 1807 830 1813 1375 Total 1063

• 963 629 716 750 747 771 823 903

• 895 853 940 973 925 924 940 1022 1030 1118 1172 1089 1217 1243 1235 Sector 2 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 96/97 98/99 00/01 0203 935 692 584 642 672 741 715 720 868 80S 801 831 772 719 662 771 790 852 9g6 986 870 863 831 825 1151 1082 322 569 488 682 793 795 929 901 871 957 1162 1229 1040 1118 1194 1210 1187 1279 1272 1450 1439 1519 203 183 176 247 327 229 172 258 259

.250 188 194 156 244 282 282 249 348 568 290 291 350 446 278 400 553 788 462 429 264 519 534 200 1321 2500 378 229 250 343 750 429 821 404 755 800 438 458 1000*

282 262 309 490 510 438 594 596 610 564 631 788 937 698 740 738 769 685 545 608 233 145 164 388 253 1282 593 330 1347 1467 2875 1260 355 1133 889 830 1833 1268 1529 2100 167 1490 1877 952 877 743 476 606

-609 684 708 732 888 787 799 834 824 861 807 895 894 990 1046 1102 1019

.t126 1055 97t 641 1250 963 1050 924 1312 1027 1602 1581 1607 1004 1009 MEAN 1306 784 1001 640 259 513 701 1198 726 8S2

aI-Table 8. 2002-2003 Condition factors for Sectors 1 and 2 by Length Segment I,1 Shorthead redhorse Silver redhorse Carp White sucker Smallmouth bass Northern Channal hogsucker Catfish Length 40-59 60-79 80-99 100-119 120-139 140-159 160-179 180-199 200-219 220-239 240-259 260-279 280-299 300-319 320-339 340-359 360-379 380-399 400-419 420-439 440-459 460-479 480-499 500-519 520-539 540-559 560-579 580-599 600-619 620-639 640-659 660-679 680-699 700-719 720-739 740-759 760-779 780-799 800-819 820-839 840-859 860-879 880-899 900-919 1

2 1

2 1

2 1

2 2

1 2

1 2

0.932 0.729 0.558 1.357 1.416 1.264 1.425 1.273 1.33 1.283 1.235 1.304 1.23 1.237 1297 1.369 1.262 1.295 1.22 1.446 1.279 1.37 1.272 1.305 1.185 1.368 1.272 1.293 1.329 1.317 1.286 1.288 1.288 1.307 1.082 1.276 1.18 1.313 1.173 1.4 1.309 1.28 1.372 1.447 1.121 1.213 1.366 0.945 0.96 0.921 1.067 1.006 1.119 1.028 1.063 1.03 1.072 1.03 1.009 1.058 1.062 1.04 1.076 1.08 1.08 1.08 1.054 1.037 1.036 1.067 1.027 1.038 1.015 1.055 1.056 1.04 0.855 0.881 1.156 1.073 1.096 1.052 1.05 0.997 1.002 1.033 1.212 1.096 0.897 1.006 1.073 1.182 1.132 1.112 1.173 1.106 1.115 1.155 1.178 1.153 1.144 1.132 1.148 1.151 1.163 1.161 1.177 1.133 1.166 1.073 1.109 1.249 1.261 1.066 0.838 1.03 1.012 1.463 0.967 1.175 1.085 1.285 1.128 1.26 1.116 1.296 1.209 1.409 1.197 1.32 1.18 1254 1.3 1.188 1.327 1.265 1.29 1.182 1.113 1.34 1.297 1.339 1.23 1.476 1.366 1.247 1.131 1.4 1.164 1.387 1.406 1.459 1.335 1.523 1.511 1.414 1.606 1.086 1.136 1.162 1.243 1.111 1.165 1.134 1.171 1.284 1.162 1.175 1.124 0.611 1.112 0.668 0.681 0.643 1.013 0.879 0.655 1.087 0.76 1.088 0.743 1.185 0.781 1.169 0.95 0.776 1.115 0.753 1.223 0.601 0.87 I

1.197 1.224 1.203 1.116 1.172 1.097 0.926 1.114 1.196 1.239 0.947 0.793 0.795 0.922 0.951 0.965 0.9 0.94 0.88 0.992 0.941 0.957 1.065 0.969 0.958 1.066 0.914 1.065 1.095 1.053 1.176 0.967 1.005 0.986 1.14 Average 1.32 1.27 1.01 1.00 1.04 1.11 1.11 1.19 1.33 1.22 1.14 1.14 0.93 0.83

Table 9. Annual Average Condrion Factor for Monticello Electrofishing Carp Year 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 96197 98"9 00/01 02/03 Average 1

2 1.31 1.37 1.34 1.35 1.35 1.33 1.27 1.28 125 1.36 1.31 1.28 1.27 127 1.31 1.31 126 1.31 1.21 1.24 1.24 1.18 1.33 1.28 1.30 1.31 1.22 1.24 1.29 1.29 1.26 1.34 1.34 1.35 1.34 1.35 1.30 1.30 128 1.26 129 1.24 129 1.30 1.31 1.29 1.32 1.27 1.29 1.30 Shorthead redhorse 1

2 1.10 1.04 1.14 1.15 1.00 0.99 0.99 0.97 1.11 1.12 1.06 1.09 1.07 1.06 1.06 1.08 1.13 1.16 1.07 1.04 1.02 1.03 1.08 1.08 1.13 1.13 1.05 1.06 1.05 1.06 1.05 1.06 1.08 1.06 1.00 1.08 1.16 1.11 1.06 1.09 1.04 1.03 1.02 1.03 1.04 0.98 1.01 1.00 1.06 1.06 Silver redhorse 1

2 1.18 1.18 1.19 1.20 1.10 1.09 1.04 1.05 1.14 1.15 1.12 1.11 1.11 1.09 1.08 1.11 1.11 1.15 1.06 1.06 1.02 1.01 1.11 1.07 1.16 1.12 1.14 1.13 1.11 1.10 1.11 1.09 1.14 1.13 1.11 1.08 1.08 1.09 1.09 1.13 1.05 1.10 1.10 1.12 1.19 1.08 1.04 1.11 1.11 1.11 White sucker 1

.2 1.30 1.15 1.17 1.14 1.14 1.08 1.12 1.19 1.15 1.18 1.12 1.24 1.15 1.17 1.15 1.14 1.22 1.21 1.10 1.11 1.09 1.08 1.17 1.18 1.11 1.04 1.17 1.18 1.21 1.28 1.15 1.21 1.24 1.28 1.15 1.22 1.16 1t11 1.07 1.15 1.09 1.07 1.12 1.09 1.10 1.09 1.11 1.19 1.15 1.16 Smallmouth bass 1

2 1.47 1.59 1.55 1.43 1.31 1.31 1.39 1.29 1

2 1

2 Northern hogsucker Channel catfish 1.48 1.43 1.28 1.21 1.41 1.36 1.42 1.39 1.35 1.33 1.53 1.57 1.40 1.35 1.39 1.52 1.53 1.50 1.41 1.35 1.39 1.39 1.36 1.41 1.35 1.40 1.41 1.33 1.38 1.42 1.40 1.43 1.40 1.30 1.37 1.37

.1.31 1.30 1.40 1.26 1.33 1.22 1.41 1.39 1.14 1.36 1.37 1.28 1.14 1.21 1.26 1.33 1.16 1.19 1.27 1.34 1.15 1.14 1.20 1.24 1.14 1.18 1.22 1.15 1.18 120 1.22 1.23 1.17 1.27 1.18 1.17 1.13 1.15 1.17 1.15 1.12 1.15 1.10 1.06 1.14 1.14 1.19 1.21 0.91 0.82 0.74 0.89 0.83 0.86 0.99 0.88

• 0.94 0.92 0.96 0.86 0.93 0.83 0.90 0.87

Table 10. 2002-2003 Length-Weight Relationship for Fish Collected by Electrofishing at Monticello (Length In millimeters and weight In grams)

Species Carp Shorthead redhorse Silver redhorse White sucker Smallmouth bass Northern hogsucker

-Walleye Channel catfish Log W =

Log W =

Log W =

Log W =

Log W =

LogW=

Log W =

Log W =

Log Formula

-4.888 + 3.000 Log L

-5.207 + 3.085 Log L

-5.332 + 3.144 Log L

-5.084 + 3.055 Log L

-5.522 + 3.249 Log L

-5.391 + 3.176 Log L

-5.724 + 3.239 Log L

-6.175 + 3.421 Log L Length Range 240 to 779 140 to 579 220 to 599 120 to 519 100 to 519 120 to 479 140 to 599 200 to 839

1. of Points 264

• 909 489 39 252 101 33 94 I

Table 11 a. Mean Weekly Values of Monticello Water Parameters in 2002.

WEEK STARTING RIVER FLOW PLANT INTAKE RIVER TEMP CANAL TEMP AVG 75-02 December January February March April May June 30 6

13 20 27 3

10 17 24 3

10 17 24 31 7

14 21 28 5

12 19 26 2

9.

16 23 30 4,774 445.0 32.2 70.8 5,216 4,974 5,001 4,496 4,343 3,988 3,901 4,348 4,188 3,760 3,619 3,685 3,975 6,619 8,210 11,563 10,428 8,554 8,279 10,950 8,699 5,824 4,496 3,605 3,547 7,759 9,360 442.1 436.8 321.9 431.3 427.0 435.3 435.3 406.6 399.6 421.6 434.7 446.7 424.5 511.9 524.6 583.0 590.2 595.4 606.2 602.7 600.4 597.7 601.6 602.1 623.0 635.3 32.3 32.2 32.3 32.2 32.4 32.1 32.0 32.0 32.0 32.0 32.0 32.0 32.0 35.8 46.1 48.6 48.0 49.4 52.5 58.0 64.5 65.6 69.8 71.0 76.2 80.4 70.2 70.7 41.9 65.8 71.9 70.6 71.0 73.8 74.9 71.9 70.8 69.8 72.0 69.5 79.6 76.8 75.6 76.5 79.5 85.5 91.6 88.6 85.5 84.0 87.6 91.0 5,112 5,156 5,107 5,057 4,892 5,030 5,074 5,099 5,184 5,788 6,241 7,003 9,537 12,248 13,965 13,563 12,194 11,007 11,242 9,104 7,853 7,162 7,194 7,733 7,700 7,439

July 7

14 21 28 August September October November December

.4 11 18 25 1

8 15 22 29 6

13 20 27 3

10 17 24 1

8 15 22 12,694 14,318 9,933 8,168 8,008 6,351 6,502 6,641 7,398 6,916 5,413 4,471 4,275 6,993 7,301 6,810 6,427 5,971 5,714 5,418 4,459 4,036 4,345 4,588 4,138 632.6 638.1 632.4 626.5 623.1 620.7 615.4 615.8 618.9 618.8 607.8 596.0 587.9 579.2 517.0 520.0 520.7 511.6 529.6 523.1 499.0 446.6 422.4 428.2 415.3 76.5 76.8 75.9 76.7 73.2 73.2 70.2 73.2 72.2 72.4 67.0 58.6 55.9 51.3 47.0 40.4 38.2 36.9 36.5 34.7 32.8 32.2 32.3 32.3 32.2 88.5 88.8 88.0 90.4

- 88.0 87.3 85.3 88.1 87.7 86.8 84.3 86.5 85.8 81.2 80.4 71.6 71.1 70.6 69.2 70.2 68.5 73.2 75.5 73.4 74.8 7,144 6,629 5,787 4,872 4,394 4,116 4,044 4,195 4,297 4,462 4,412 4,640 5,021 5,391 5,692 6,028 5,812 5,736 5,563 5,273 4,944 4,698 4,657

.4,746 5,296

.Mean 52 6,351 529.4 49.7 77.9 6,457 II

Table 11 b. Mean Weekly Values of Monticello Water Parameters in 2003.

WEEK STARTING RIVER FLOW PLANT INTAKE RIVER TEMP CANAL TEMP AVG 75-03 December 29 4,265 428.9 32.3

-73.7 5,183

• January February March April May June 5

12 19 26

.2 9

16 23 2

9 16 23 30 6

13 20 27 3,928 3,575 3,083 2,866 2,682 2,810 2,687 3,015 2,913 2,771 3,531 4,612 4,178 3,820 5,001 10,166 7,503 6,301 9,658 9,157 7,565 5,495 5,777 5,047 10,320 14,553 448.0 445.8 429.4 428.1 418.7 416.0 464.9 430.6 427.4 422.3 452.4 474.0 526.7 521.6 557.1 490.1 22.3 26.8 21.4 188.1 537.2 614.9 619.4 552.4 634.2 635.6 32.3 32.2 32.3 32.3 32.9 32.4 32.2 32.4 32.6 32.7 32.9 35.2 36.8 41.2 48.4 47.7

.55.9 55.0 57.5 60.9 64.4 65.7 66.4 74.1 70.9 72.6 71.4 71.9 73.4 73.0 75.3 75.7 69.9 73.4 74.5 74.8 71.6 71.8 70.4 74.8 79.2 71.8 64.0 61.3 62.6 63.1 81.2 93.7 90.4 81.6 85.7 86.9 5,072 5,102 5,037 4,957 4,816 4,953 4,992 4,996 5,106 5,684 6,147 6,920 9,252 11,957 13,656 13,446 11,907 10,844 11,188 9,106 7,773 7,104 7,145 7,640 7,791 7,751 4

11 18 25 1

8 15 22 29

Il July August September October November December Mean 6

13 20 27 3

10 17 24 31 7

14 21 28 5

12 19 26 2

9 16 23 30 7

14 21 52 12,038 10,290 7,220 5,120 4,286 3,407 2,631 2,062 1,945 2,238 2,452 2,287 2,078 2,005 2,056 2,185 2,442 2,540 2,575 3,030 2,480 3,302 2,892 3,416 3,497 637.4 638.6 631.2 626.0 623.3 621.3 617.9 612.1 605.4 605.6 599.5 587.1 582.9 575.6 563.6 561.4 556.9 556.5 541.5 550.3 423.1 421.1 414.6 381.4 412.7 74.9 73.6 74.8

• 76.0 76.0 77.8 78.3 74.8 70.2 70.3 65.3 57.9 51.7 57.5 53.7 52.8 44.0 36.7 35.6 37.5 34.0 32.6 32.5 32.1 32.4 87.1 87.2 87.6 88.4 88.2 89.9 90.6 88.3 83.5 86.6 91.0 87.5 81.7 88.0 85.1 84.0 75.0 68.4 68.6 69.1 75.9 74.8 73.6 75.8 75.1 78.2 7,312 6,760 5,837 4,994 I'

4,391 4,092 3,995 4,206 4,216 4,385 4,345 4,559 4,893 5,274 5,566 5,895 5,717 5,626 5,460 5,196 4,859 4,650 4,596 4,700 5,234 4,572 491.9 50.9 6,390

MONTICELLO NUCLEAR GENERATING PLANT ENVIRONMENTAL MONITORING PROGRAM 2002 - 2003 BIENNIAL REPORT A

SUMMARY

OF THE 2002 - 2003 MONTICELLO SEINING SURVEY Prepared by-Xcel Energy Environmental Services

AU

SUMMARY

OF THE '02-'03 MONTICELLO SEINING STUDY I

INTRODUCTION During 2002 and 2003, a seining survey was conducted on the Mississippi River near the Monticello Nuclear Generating Plant (MNGP). Seineable locations over a 1.6 kilometer stretch of river were sampled to make observations on the relative abundance and species composition of the small fish community in the vicinity of MNGP.

Comparison of these data was made with the previous seining surveys as a historical overview of the relative abundance for this small fish community. Observations on reproductive success of major 'large fish" species were also made using young-of-the-year (yoy) seining data from previous surveys.

Seining was. initiated at Monticello in 1970 and since 1977 the study design has remained the same to allow comparison of data through the study period. Fluctuating water levels cause seining locations to change through the course of the study. An attempt was made to sample similar habitat types above and below the MNGP discharge structure on each occasion. Seining was conducted eight times at approximately two-week intervals between 10 June and 10 September in 2002 and seven times between 11 June and 4 September in 2003 MATERIALS AND METHODS A 25 foot seine was used for sampling during the seining study. Hauls were directed downstream and the distance of each seining haul was recorded. Captured fish were identified, tabulated, and released. Voucher specimens were preserved in a 10 percent formalin solution.

Computation of the area sampled was accomplished by multiplying the length of the haul by the width of the seine. Species abundance indices, or catch-per-effort (CPE),

were computed by expanding the number of fish captured per haul and expressing the results as number per hectare. Abundance indices were utilized to calculate percentage composition of each species in the total catch.

Freshwater Fishes of Canada (Scott and Crossman, 1983), Northern Fishes (Eddy and Underhill, 1976), The Fishes of Missouri (Pflieger, 1975), Illustrated Key to the Minnows of Wisconsin (Becker and Johnson, 1970), and were the taxonomic references used to identify captured specimens.

Fish species assemblages from the upstream and downstream sectors were compared on the basis of species persistence. The persistence value was computed from an index of species tum-over rates (Meffe and Minkley, 1987). The formula T=(C+E)/(Sl+S2) (where C and E are the number of taxa that appeared or disappeared, respectively, between sample periods, and SI and S2 are the numbers of' taxa present in each sample period) measures the rate of species turnover between two samples. The mean turnover rate, for each assemblage, is then calculated from the

)

individual turnover rates of all adjacent sampling periods. An index of persistence (PR) ranging from 0 or no persistence to 1 or complete persistence was then calculated as 1-T. An index of 1, meaning no species change through the study period, would indicate a relative lack of disturbance to the system (Bass, 1990).

RESULTS During the 2002 and 2003 seining studies 11,910 and 6,291 fish were collected respectively. This compares to 5,959 in 2001, 9,333in 2000, 10,033 fish in 1999, 6,295 fish in 1998, 3,996 fish in 1997, 3,434 fish in 1996 3,534 fish in 1995, 3,184 fish in 1994, 2,031 fish in 1993 and 6,929 fish captured in 1992. The 2002 seine catch was comprised of 27 species from seven families (Table 1). In 2003, 31 species were collected from eight families. One new species, banded killifish was collected in the downstream sector in 2003. Eleven families, including 44 species, have been collected since seining studies began in 1970. A composite list of fish species collected from the seining and electrofishing studies and their scientific names is compiled in Appendix A.

Table 2 illustrates the annual species percent composition observed and the average for the study period. Tables 3a and 4a depict 2002 daily abundance (fish/hectare), the yearly average, and the overall percent contribution to the total catch, for fish collected in the upstream and downstream study areas,'respectively. Tables 3b and 4b provide the same set of data for the 2003 study. Figure 2 compares the 2002 species composition by sector. The 2003 species composition, by sector is compared in Figure

3. The average composition for the study period in the upstream and downstream sectors is compared in Figure 4: Tables 5 and 6 compare annual average fish/hectare, by species, for each sector from 1977 through 2003. Annual fish abundance data are graphed by Sector in Figure 5.

The 2002 and 2003 species dominance rankings for the upstream and downstream areas are compared in Table 7a and 7b, respectively. Annual dominance ranking for the five most abundant species is shown in Table 8. Abundance indices for yoy of selected species (smallmouth bass, white sucker, and the Moxostoma species.) are presented in Table 9. These indices are reviewed annually for an indication of the reproductive success for these dominant "large fish" species found in the MNGP area of the river.

Annual mean abundance for the upstream and downstream sectors was compared for species persistence. Thirty-nine species have been collected in the upstream sector during the 27-year study. Six (15.4%) of those 39 species have been observed every year and have contributed an average of 79.0% (range of 32.1 % to 97.2%) of the total estimated annual abundance. Annual turnover rates (T). ranged from 0.11 to 0.32 with a mean PR value (1-T) of 0.798.

Forty-one species have been identified as a result of seining in the downstream sector during the past 27 years. Six (14.6%) of the 41 species occurred every year and contributed an average of 59.1 % (range of 26.5% to 88.6%) of the estimated annual

I I

abundance. Annual T rates in the downstream sector ranged from 0.13 to 0.28 with a mean PR value of 0.808.

Trends in individual species abundance are illustrated on Figures 6 through 16. The trend projections are based on all seining events during the study period. The R2 values, as shown on the figures, for the trend lines indicate they are generally not statistically significant. Rather the trend lines are used as an indication of similar conditions for each species in the two sectors.

DISCUSSION Upstream abundance in 2002 was 170% of the average while in 2003 the upstream abundance was 70%'of the average. Downstream abundance was 146% and 92% of the study average in 2002 and 2003, respectively.

Species diversity, 26 and 31 in 2002 and 2003 respectively, was relatively high.

Species diversity has been variable in the previous ten years with a low of 22 species collected and a high of 32 species (Table 1). An average of 25 species per year was collected between 1970 and 2003: Cisco, central stoneroller, creek chub, river shiner, northern redbelly dace, black bullhead,'yellow bullhead, brook stickleback, white crappie, rock bass, and green sunfish were species found in previous surveys but were not seen in 2002 or 2003.

During the 2002 survey 22 species were collected in the upstream sector (Table 3a) and the downstream sector (Table 4a). In 2003, 22 species were collected' upstream (Table 3b) while 28 species were encountered downstream (Table4b). During 2002-and 2003 longnose dace, trout perch, and brook silverside were found in the upstream sector only; while, northern pike, creek chub, golden shiner, bigmouth buffalo, channel catfish, banded killifish, and largemouth bass were only found in the downstream area.

Historically, species diversity has been greater in the thermally influenced portion of the MNGP seining study area. Conversely overall fish abundance has been generally higher in the upstream sector (Tables 5 and 6).

Figure 2 illustrates the 2002 percent contribution of the various species in the upstream and downstream sectors. Species contributions for the two sectors in 2003 are compared in Figure 3. The mean species contribution, by sector, for the study period are depicted in Figure 4. Shiners, as a group, comprised 87% of the fish caught upstream in 2002 and 69% of total upstream fish in 2003 (Tables 3 and 4) compared to an average of 68%. Upstream species contribution by shiners has varied from 34% to 93% during the 27 years of data. Downstream species composition, listed on Tables 3 and 4 and depicted in Figures 2 and 3, show 59% of downstream fish were shiners in 2002 while 63% of fish were shiners in 2003 compared to the 'average of 62% for the study period. The contribution of shiners to species composition has ranged from 21 %

to 93% in the downstream sector. Although there is some annual variability between sectors in shiner abundance, the mean percentage of shiners in each sector is similar.

4 Fish abundance has been higher in Sector I every year except 1982, 1993, 1994, and 2001 (Tables 5 and 6). Generally, the difference in abundance may reflect the greater efficiency in seining the shallow upstream riffles as opposed to the deeper runs in the downstream sector as well as the greater diversity of habitat available upstream.

Total and individual species abundance shows wide annual variability (Figure 5).

During the 27 year study period, estimated upstream fish/hectare has ranged from 6,115 in 1 994 to 44,164 in 1999. Downstream abundance dropped to an estimated 4,386 fish/hectare in 1995 and peaked at 28,074 fish/hectare in 1985. Mean estimated abundance for the study period was computed to be 17,563 fish/hectare upstream compared to 12,285 fish/hectare downstream (Tables 5 and 6).

An Index of persistence was calculated from 27 years of seining data at MNGP. The calculated values are similar to values reported by other investigators (Bass, 1990 and Meffe and Minckley, 1987). Data for 2002 indices for persistence from Sector 1 and Sector 2 were 0.83 and 0.84, respectively. Persistence indices for 2003 were 0.82 and 0.76 for Sectors 1 and 2 respectively. Upstream mean PR was 0.80 (range of 0.68 to 0.89) while downstream mean PR was 0.81 (range of 0.72 to 0.86).

The persistence values computed from electrofishing data were somewhat-higher than the seining values but also exhibited good agreement between sectors. The.slightly lower seining values might be expected due to the greater susceptibility of small and yoy fish to short term habitat fluctuations. The fact that both sets of indices exhibit close agreement between sectors supports the idea that disturbance factors appear to affect the two sectors.similarly.

The abundance of the selected persistent species (those present nearly every year) in both sectors was examined for the presence of trends. Figures'6'through 15 illustrate projected trends for selected fish species. Trends in both sectors appear to be decreasing for white sucker (Figure 6), johnny darter (Figure 7), hornyhead chub (Figure 8), and shorthead redhorse (Figure 13). Trends appear to be increasing for sand shiner (Figure 9), total estimated abundance (Figure 12), and smallmouth bass (Figure 15). For bigmouth shiner (Figure 10), bluntnose minnow (Figure1l) and spotfin shiner (Figure 14) the trend lines appear nearly flat. In all of these instances the trend lines for the two sectors are similar (in no case are the lines going in opposite directions) indicating similar conditions for upstream and downstream fish.

In 2002 the dominant species in the upstream collections (Table 7a) were: sand shiner (65.4%), spotfin shiner (16.8%) and bluntnose minnow (5.6%) collectively comprising.

87.8% of all fish observed. Table 7a also illustrates that the downstream samples, in 2002 were dominated by spotfin shiner (29.1%), sand shiner (24.1%) bluntnose minnow (19.7%) and smallmouth bass (16.6%) contributing 89.5% of the fish collected. The 2003 upstream collections (Table 7b) were dominated by sand shiner (54.8%), spotfin shiner (9.8%) logperch (8.1 %) and Moxostoma species (7.0%) together comprising 79.7% of species. Dominant species downstream (Table 7b) in 2003 were: spotfin shiner (44.0%), sand shiner(17.7%), smallmouth bass (14.4%), and Moxostoma

_1 species (11.2%) contributing 87.3% of fish collected. The combined upstream and downstream species dominance ranking for 1977 to 2003 is listed on Table 8. It is apparent from this dominance ranking that the spotfin shiner, and sand shiner are the major forage fish in this section of the river.

Table 9 illustrates the average abundance (fish/ha) of smallmouth bass, white sucker, and Moxostoma species since 1977. Smallmouth bass abundance was above average in 2002 and 2003 in both sectors. The apparently high abundance in both years may be due to low flows in June in both years, promoting good survival.

White sucker numbers were below average in 2002 and 2003. Moxostoma spp. were somewhat below average in 2002 and above average in 2003

SUMMARY

A total of 11,910 fish was collected by seining in the Mississippi River near MNGP in 2002 while 6,291 fish were encountered in 2003. This compares with 5,959 fish in 2001, 9,333 fish in 2000,10,033 fish in 1999, 6,295 fish in 1998, 3,996 fish in 1997, 3,434 fish in 1996, 3,534 fish in 1995, 3,184 fish in 1994, 2,031 fish in 1993 and 6,929 fish captured in 1992. In 2002, 27 species from seven families were identified. Seining in 2003 produced 31 species from eight families. Forty-four species from eleven families have been identified during the study period.

Dominant species overall in 2002 and 2003 were again sand shiner and spotfin shiner.

Sand and spotfin shiners and bluntnose minnows have consistently been among the five most dominant small fish species during the study period.

Abundance indices were higher in Sector 1 in both years. Abundance indices were above average in both sectors in 2002 and below average in both sectors in 2003.

ACKNOWLEDGMENTS A special thanks is given to the University of Minnesota Museum staff for verification of certain specimens.

.)

)

LITERATURE CITED Bass, D.G. 1990. Stability and persistence of fish assemblages in the Escambia River, Florida. Rivers, 1(4):206-306.

Becker, G.C. and T.R. Johnson. 1970. Illustrated Key to the Minnows of Wisconsin.

Wisc State University, Stevens Point, Biology Department. 45pp.

Daniel, W.W. 1978. Applied Nonparaametric Statistics. Houghton Mifflin Company, Boston MA. 503 pp.

Eddy, S. and J. C. Underhill. 1976. Northern Fishes. University of Minnesota Press, Minneapolis MN. 414 pp.

Meffe,, G.K., and W.L. Minckley. 1987. Persistence and stability of fish and invertebrate assemblages in a repeatedly disturbed Sonoran Desert stream.

American Midland Naturalist 17(1):177-191.

Pflieger, W.L. 1975. The Fishes of Missouri. Missouri Department of Conservation Publication. 343 pp.

Scott, W.B. and E.J. Crossman. 1973. Freshwater Fishes of Canada, Bull. 184 Fisheries Research Board of Canada, Ottawa. 9 66pp.

0

B3.EA Ts LLNM COOLING TON-Eas DISCF4.RGZ CAITAL a

0.5 Lj

,~+/-1 =e: ers 0MCW ISLA2ID BCA.T

-TLZ3R5AL

?tmLV-MONTL.SIMPI ?ARMI Sector 1 2 Sector 2 Figure, 1.

Seining Study Area.

)

I I

Figure 2

)

2002 Upstream Species Composition Shiner spp.

1%

Bluntnose minnow.

6%

Moxostoma spp.

2%

Smallmoutfh bass 2%/

Bigmouth shiner 2%/

Sand shiner 66%

Hornhead chub Other 1%

2%

Comrmon shiner I

t 2002 Downstream Species Composition Backside darter 1%

Shorthead redhorse 1%

Other 3%

Homybead chub 1%

Moxostoma spp.

3%

.,..S.

Spottin shiner 28%

Common shiner 2%

)

E Figure 3 2003 Upstream Species Composition Shorthead redhorse 2%/

Logperch 8%

White sucker 4%

Johnny darter 1 %

Moxostorna sp 7%

Bluntnose minnow 4%

Smallmouth bass 6%

Sand shiner 55%

Other 3%.

Shiner spp.

3%

Spotfin shiner 10°h 2003 Downstream Species Composition Logperch 1%

Moxostoma spp 11%

Smallmouth bass 14%

Spotfin shiner i 45%

Shorthead redhorse 3%/

Bluntnose minnow 1%

Sand shiner 18%

Johnny darter 2%

Other 4%

Common shiner 1%

)i

Figure 4 1977 to 2003 Upstream Species Composition Moxostoma spp.

5%

Smallmouth bass 2%/

White sucker 3%

Shiner spp.

5%

Sand shiner 37%

Other 7%,.

Bigmouth shiner 10-.

1977 to 2003 Downstream Species Composition White sucker Bigmouth shiner 2% Johnny darter 31/

2%

Moxostoma spp.

4%

Smallmouth bass 7%

8-/.w Blunthose minnow 14%

Spotff shiner 33%

Shorthead redhorse 1%

f)

_.mu-Figure 5.

Annual Species Abundance Comparison.

Upstream Abundance 50000 45000 40000 35000 30000 S

" 25000 UI.

20000 15000 10000 5000 0

1980 1980 1980 1980 1990 1990 1990 1990 1990 2000 1997 1999 2001 2003 I a Shkwrs U Moxosorna U Srmalbnouth bass D Bkuoose nrbnw C Johnny aners a Other Downstream Abundance 50000 45000 40000 35000 30000 S

'Ia

• 25000 20000 15000 10000

• 5000 0

1980 1980 1980 1980 1990 1990 1990 1990 1990 2000 2000.

2000 2000 2000 I It Shiuhg SMMox n ESmafuth bass MBtmunmmrramow Cjohrny darter a ter I i

Figure 6 Species Abundance Trends White sucker 20000 18000 16000 -

14000 12000 C,,

I E I10000 i7L 8000

+

Upstream F? = 0.0311 Downstream Ff = 0.0176 3

+

a 6000 4000 -

2000 -

0*

+

13

+ r 0

a 0

03 m+

+

3

+

3

+

1 Alla6k al.a+

t;

=2 u ' +

~

g 'ts( L;1 l;5 81m; ,s

>li fL.tQ z *0 1 980 2003 0

Upstream

+

Downstream Upstream

- Downstream

Fijre 7 Species Abundance Trends Johnny darter 9000 8000 7000 6000 5000 4000 3000 2000 1000 0

II 1980 2003 I

0 Upstream

+

Downstream Upstream Downstream

Figure 8 Species Abundance Trends Homyhead chub 2500 2000 1500 I

,y 1000 500 0

1 980 2003 l

a - Upstream

+

Downstream Upstream Downstream.l

Fiyure 9 Species Abundance Trends Sand shiner 70000 60000 50000 40000 (j

LL I

30000 20000 10000 0

1980 2003 I

Upstream

+

Downstream Upstream Downstream

Fig thur~ 0 Species Abundance Trends Bigmouth shiner c(1 20000 18000 16000 14000 12000 10000 8000 6000 4000 2000 0

1 980 2003.

I a

Upstream

+

Downstream pUpstream --- -.-

Downstream

Figure 1 1 Species Abundance Trends Bluntnose minnow 35000

+

Upstream R2 0.0083 Downstream R2 = 0.0001 30000

+

25000 03 20000 CE 15000

+

10000

+ +

+

+ +

°+

+

o oE +

5000 i+a

+00+

3 0

1980 2003 I 0 Upstream

+

Downstream Upstream -.

-.DownstreamI

Figure 12 Species Abundance Trends Total Fish 140000 Upstream R2 =0.0087 0

Downstream R2 = 0.0011 120000 100000 a

80000 CT; co O+a..

Li:

+

60000

+

0 0

0 0

+

+

• 40000

+

o+

°

+

a

+

20000

++

9 32003 l

3 Upstream

+

Downstream -

Upstream.

Downstream I

Fiyure 13 Species Abundance Trends Shorthead redhorse 7000 Upstream fR=0.0194 Downstream Ff = 0.0018 6000 a0 5000 4000 i+

n3 3000 2000

+

+

0 03 3 1000

+

+ +3+

O +

°+

X-

+

0 2003 1980

_2003 o

Upstream

+

Downstream ----

Upstream.-.-

Downstreaml

Figure 14 Species Abundance Trends Spotfin shiner

• 60000 50000 40000

' I

~

30000 co 20000 10000 O0 1 980 2003 I a Upstream

+

Downstream Upstream DownstreamI

Figure 15 Species Abundance Trends Smallmouth bass 16000 14000 12000 10000 Cl iL 8000 6000 4000 2000 0

1 980 2003 9r 2

Upstream

+

Downstream 003Upstream Downstream]

Table 1. Monliceflo Sefning Skldy.- Speaies VMSt for 1970 through 2003.

Ic 1970 1973 1978 11977 1979 1§79 1990 1VIA I

1992 199 1994 I9NS 1999 I1997 1999 1999 10901 I9§ 1992 1991 1 N A too' 1 999 197 INA 1999 2000 2001 2002 2003 Yaars SPECIES Northean Pike CISCO Central slonerdiler Hormyhoed chub Creek chub Faftead mirinow 1Okwnnose minnw Brassy minnow Spoifin Shiner Digmourts Shiner Send Shiner nivet shiner Spoltel shiner Comrnon shiner Golden shiner Mimic shiner Corp Longnose dISCO Blacknose dISCO N. redbelly dace Sliver redhorse Shorthesd redhorse White sukelr Blgmouthl Isuffalo Northern hogsucker Channel catfish Black bufhead Yellow btllhead Trowlparots.

Banded kdlfltih IBrook slickdebeck Brook stverside Smallmouti beess Lurgernwult base Black crappie While crappie Rock bass Bluegill Green Sunfish Logperch Johnny darter Welleye Yellow perch Bfockklde darter 5.

Ic N

o Ic o

It o

Ic 5

Ic Ic If 5

Ic o

Ic o

K o

Ic Ic 5

Ic 5

Ic 5

x S

Ic It 5

ox o

o x

Ic 0

o x 5

o a

Nc S

51 Ic Ic S

Ic Ic It o

a o

5 Ic 5

o 5

Ic 5

Ic 5

5 Ic 5

5 5

5 5

o s1 Ic 5

Ic 5

o a

Ic A

oA a

Ic 5

Ic 5

Ic 5

Ic Ic o

5x N

s N

Ic Ic Ic Ic Ic Ic Ic 5A 5

N 5X 5

Ic Icx o

Ic ax S

5 I

I aX a

s N

5 5

Ic c

5 5

5x Ic c

It Ic I

01 a

s a

Ic Ic 5

If Ic a1 5

S Ic 5

5 5

'AX a

a Ic Ic Ic Ic Ic Ic Ic Ic a

51 5

51 Ic1 aX Ic Ic Ic a

5X 5X 5

Ic Is 3

Ic 5

a 30 Ic.

7 5

5 Ic 24 o

Ic Ic 30 o

Ic 5

le II Ic 5

30 o

c Ic 30 c

Ic 5

30 3

x s

s 29 5

Ic I

30 5

5 S

II 1 x

14 5

5 27 If a

s 25 5

5 I c

• 2 9I c

5 Ic 29 o

Ic I

30 Ic x

3 Ic 5

I 24 o

Ic a

S 5X 51 5

a o

5 5

I Ic Sx o

Ic 5

Ic a*

Ic Icx Ic I

S Ic a

Ic I

S I

I I

Nc S

N N

NIc a

t I

Ic 5

5 Ic Ic 5x x

II II Ic c

Ic Ic I

5 Ic Ic c

Ic S

S Ic I

S Ic Ic v

5 a

a 5

II N

Ic o

IcN Ic o

N 51 a

a a1 S1 Ic S1 S

5 a

o N

0 I

5 a

Ic I c I c I

I cf I c N

Ic 5

5 Ic 0

S II Ic Ic 5X xII Ic 5

Ic Ic Ic I

I Ic S

c Ica a,

S 5

S 5

51 5x a

o a

o a

o s

A I

It Ic Ic o

x 5

c 5

If 5

21 Ic I

5 Ic N

It II 20 Ic s

s a

5 3 0 I c 5

s o

1 9 1Ii 5 c I

5 29 c

Ic c

Ic 5

3 0 Ic 5

Ic S

I 1 9 xc t

o s

a x

s 23 Total I Species 19 21 la 23 21 22 26 24 23 31 Totll~ocea 9 2 1 23 21 2 6 2 23 31 30 23 26 24 2A 22 29 32 23 22 22 29 30 28 29 26 27 29 29 31 44

Table 2. MontrLego Seining Study-Species Percent Compostdlon SPECIES Northern pike CSCO Central storweroler Homybead cdwb Creekthub Fathead rnnow Dtuntnose mInnow Brassy rmnnow Spolln shiner Blgmouth shiner Sand Shiner River shiner Spoltal shiner Cormon shiner Golden shiner MtOO Shiner Carp Lononose dace Blscknose dace 5lver redhora.

Shorthead redhofse White sucer Bomnouth brdlalo Northern hoosuckor Channel caltish Btack brlihead Yelow bullhead Trout-perch Banded ilrllsh Brook eslIcback Brook aslertde Srnnsoulh bass Largemouth bass Black crapple While crappie Rock bwss Bregiltl

• Green sunftsh Log perch Johnny dartof Wageye Yellow perch Blacrslde darter Shiner tpp.

MoXoaloSnI app.

Centrarcid spp 1970 1973 1976 1977 1978 1979 1950 1981 1982 8983 1984 1985 1988 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Mearl 3.1 0.3 12.7 21.1 27.3 18.4 1.0 2.9

.0.1 3.1 0.4 2.5 1.7 0.1 3.0 0.2 1.0 1.1 0.1

.0.I 0.9 0.6 0.2 0.4 0.1 0.4 16.2 23.4 18.1 40.3 7.3 5.3 0.3 23.5 23.4 t9.3 22.5 150 12.6 21.8 12.4 22.1 2t.6 42.4 5.1 2t.6 IS.3 5.6 0.1 13.0 8.9 66 0.4 0.8 0.2 0.2 0 8 2.4 3.4 0.2 1.2 0.8 0.4 0.1 0.1 0.1 0.5 0.1 0.4 0.7 2.0 0.6 1.1 3.5 0.3 0.1 0.I 0.1 0.1 1.1 0.8 0.1 1.0 3.3 0.1 0.2 1.3 3.9 2.5 6.3 1.2 5.0 29.7 0.3 2.3 (0.1 0.4 0.1 0.7 0.1 (0.1

.0.1 0.1 0.1 1.0 0.4 0.4 1.2 4.1 6.2 0.2 0.1 0.4 06 02 0.2 (O.1 0.2

• 0.1

<0.t 1 o.1

<0nG 0.1 0.3 0.2 0.3 3.9 0.1 3.9 2.6 1.3 6.2 1.3 1.4 8 9 0.11 1.t 0.1 6.3 11.2 3.0 36.6 0.1 0.7 0.1

.0.1 1.6 0.4 1.6 2.6 0.9

.A<0.1 I~

O.1 1.4 2.6 2.0 2.0

'0.1 0.3 0.1 1.0 12.6 9.4 12.5 166 t0.1 0.1 0.1, 41.8 35.7 31.1 28.2 3 4 2.5 2.4 5.8 10.7 20.9 21.8 35.0 0.7 0 4 0.3 0.1 1.6 0.6 0 2 0.1 0.1 (0.1

.0.1 0.1 2.2 1 A 2.7 0 2 0.3 0.2

'0.1 0.1 0.2 0.1 I.I 0.6 0.1 0.3 4.8 0.6 2.9 1.2 1.0 1.0 0.5

<0.1 (O.1 2.3 0.8 0.1 1.2 40.1 o0.1 0.2

<0.1 4 8 2.2 1.6 0.7 0.1 (0.1 0.1 0.2 0.4 0.1 (0.1 02 0.1 0.4 0.6 (0.I 0.1 1.6 2.4 0.1 2.9 0.9 5.0 4.5 0.1 0.1 O.

0.1

.0.I 0.1 03 1.4 0.1 4.2 1.6 7.9 1.9 3 a 14.4 3.3 0.6 0.1 2.7 0.1 21.5

.0.1 23.9 4.1 20.7 02 0.2 0.1 0.2 0.1 0.1 02 0.1 0.3 0.3 0.4 14.6 to9 4.4 48 1.0 0.1 05 3.0 0.7 3.A 6.6 4.9 1.2 0.4 0.1 16.8 42.3 3.9 7.4 0.2 0.3 (0.1 0.1 to.1 0.5 3.3 0.6 02 0.1 (0.1 0.1 4.2 0.1 0.1 0.4 0.2 0.9 2.1 0.6 9.7 6.3 0.6 o0.1 0.1 0.4 14.2 19.2 47.6 27.3 4.4 6.0 16.3 340

.. I 0.9 0.4 0.11 to.I 40.1 0.2 0.2 0.1 0.1 1.1 0.4 0.5 0.4 0.6 0.3 0.1 0o.I (0.1 4.1 0.2 0.1 0.1 0.3 0.2 0.3 0.7 0.3 0o.I

0. I 0.1 0.8 25.8 7.0 5.4

2.

0.3

.0.1

.0.1

-0A1 o.

12.9 9.5 6.4 11.4 8.8 10.3 11.2 4.4 2.3 6.5 45.3 41.0 47.5 18.5 28.5 0.1 0.5 0.4 0.1 0 4 0.3 0.1 0.3 2.7 2.1

.0.1 0.3

<0.1 (0.1 (0.1 0.2

.o.I 0.3 0.2 0.3 06 9.0

'0.1 0.8 0.1 0.2 o0.1 0.3 1.2 2.1 0.3 2.9 0.3 0.6 0.0A 0.I 1.7 0.1 0.1 5.0 3.9 (0.I 0.o1 0.4 1.4 3.4 0.1 0o.1 4.4 19.0 0.1 0.7 0.1

0. 1 0.4 1.6

.o.1 0.4 0.4 0.2 0.5 02 1.7 103 6.0 08 0.9 12.6 17.2 0.3 6.3 0.5 o0.1 0.1 1.4 0.1

.0.1

.0.I 0.2 0.7 0.1 0.4 6.6 2.9 0.4

0.

1 0.1 0.lI 1.0 1.9 0.5 0.1 (0.1 0.1

.0.1

0. 1 0.11.0.1 1.5 0.4 0.o.

0.8 o0.I 2.4 1.0 0.1 0.2 (0.1 0.3 0.1 1.4 0.3 0.2 0.1 0.2 9 5 10.6 17.1

.O.

0.1 0.1 0.3 0.4 0.1 1.4 4.9 1.1

<0.1 17 0.1 0.1 182 0.1

.0.1 1.4 0.9 0.4 0.1 0.8 2.2 16.1 0.3 Ao.1

.0. It0o.

0.1 (o.1 (0.1 (0.1 (0.1

• 0.1 0.2 0.4 0o.1 0.2 0.1 0.6 1.1 0.2 0.9 (0.1 0.1

'0.1 0Q1 0.1 0.2 01 t.Q1 O.0. 0.3 o.t 0.2 0.4 30 5.4 5.6 1.2 3.6 10.9 0.s 10.6 0.o s

0.2 o.1

.0s 0.1s 0.2

o.

.*Qt 45.3 23.9 24.1 17.8 14.5 17.2 21.4 2564 22.9 0.4 4.2 3.1 13.8 1.5 1.0 t.6 0.6 7.5 6.1 39.9 24.2 63.8 15.3 70.0 49.9 36.6 26.5 0.3 0.1 0.6 Ol 0.1 0.3

.0.8 0.2 0.2 0.4 1.9 1.0 0.6 2.5 1.2 0.7 1.2 0.6 0.8 4.11

.0.1

.o.1

.o.

.o0t

.o.s I o

4

.o 4l

.0.1

<o.tf

0.

• Q0.1I

• 0.1 0.1 0.0 0o 0.1 0.1 0.1 1.2 0.1 0.1 0.8 0.9 0.1 83.2 0.1 10.4 0.2 0.3 0.2 0.7 0.2 0.3 0.2 0.1 2.0 0.1 02 0.1 0.6 1.7 1.0 2.1 0.2 6.4 0.2 0.4 2.1 1.4 3.1 5.1 4.6 0.6 11.9 0.1 0.1 2.8 4.0

.0.11 t0.1 (0.1 1.1 0Q7 0e2

.. 1 2.s 0e2

<Ql e.5 0e6

.0.1

• 0.1I <0 I 01 I

~

<0,1 <0.t (0.I 0.1 (0.1 (0.1 1.5

<0.1 (0.1 40.1 (0.1 0.4 (0.1 I0.1 (0.1 I

0.1 (0.

0o.

0.2 (0.1 0.2 (0.11 (0.1 g0.

24.7 7.8 6.8 1.8 7.1 0.2 7.7 0.t 5.9 0.8 o.1 0.1

<o l 0.1

<o.

o.1l o.l

.0.1

<0,1 0.1 0.1 O0t

.0.1

.0.1

.0.8 0.9

<0.1 1.9 0,2 0.2 (0.1 0.1 0.1 0.3 0.1 0.1 2.6 0.1 2.0 (0.1 0.2 4.7 1.2 1.8 0.4 0.9 0.7 0.8 0.5 0.3 1.7 2.7 t.t 0.2 O.t 0.4 ot1 02 0.1 ot0.

0.2 (0.1 (o0.

0.1 0.2 0.4 0.4 1.e (0.1 0.3 0.6 0.4 1.7 08 1.1 0.1 4.5 4.5 0.6 1.7 3.6 7.1 8.5 15.3 14.2 0.1 2.5 9.1 6.7 0.3 (0.1 I

I 0.1 0.3 1.6 0 2 0.3 0.6 86.9 0 5 0.1 0.1 I.e 5.I 0.3 56 (o.1 2.7 2.7 0.2 0.9 0.6 2.7 0.1 0.1 0.1 0.4 4.9 1.6 1.0

<0.1

<0.1 0.2 0.3 11.0 2.4 6.7 31.3 (0.8

1 4

Table 3a. 2002 Monticello Seining Study - Fishlhectare. Weighted Average, and percent of Catch for the Upstream Sector Weighted 8t29 9110 Average 6/10 6/25 7/09 7/29 8108 8/20 Percent Homyhead chub Fathead rninnow Bluntnose minnow Brassy minnow Spotfin shiner Bigmouth shiner Sand shiner Spottail shiner Common shiner Longnose dace Blacknose dace Shorthead redhorse White sucker Northern hogsucker Trout perch Brook sitverside Smallmouth bass Black crappie Logperch Johnny darter Walleye Blackside darter Shiner spp.

Moxostoma spp.

70 47 1123 861 302 795 428 116 70 1292 80 2816 1001 14530 1148 38 197 186 2914 1682 46 23 265 44 3095 512 50158 3157 6851 1378 4678 4769 5002 140 349 1076 574 262 689 1117 1656 689 6656 2932 58231 46283 5316 26735 27555 25501 19472 72 431 56 186 323 143 861 271 140 33 216 70 116 32 140 628 132 74 209 48 23 430 72 23 28 23 66 12 108 72 8

38 4

93 1614 789 1048 1255 1513 132 723 47 8

108 72 172 186 68 46 93 108 72 38 186 72 108 72 148 32 215 72 172 199 64 1490 288 838 2583 589 1.4 0.3 5.6 0.2 16.8 2.3 65.4 0.2 0.7 0.1 0.4 0.2

<0.1

<0.1

<0.1

<0.1 2.4

<0.1 0.2 0.2 0.1 0.2 1.0 2.0 99.7 Total 14242 10007 128301 52598 15575 33952 36095 36761 29777 Table 4a. 2002 Monticello Seining Study - Fishthectare, Weighted Average, and Percent of Catch for the Downstream Sector 6/10 6/25 7/09 7/29 Northern pike Homyhead chub Fathead minnow Bluntnose minnow Brassy minnow Spotfin shiner Bigmouth shiner Sand shiner Spottail shiner Common shiner Blacknose dace Silver redhorse Shorthead redhorse White sucker Smal mouth bass Largemouth bass Black crappie Bluegill Logperch Johnny darter Walleye Blackside darter Shiner spp.

Moxostoma spp.

306 76 143 194 25 265 5416 1013 29011 7535 167 25 72 5722 8661 5630 6243 56 51 331 11500 2330 7154 7319 143 1444 380 203 Weighted 8/08 8/20 8/25 9/10 Average 39 4

235 22 92 48 1957 544 420 298 3524 32 1722 3671 6999 1987 5219 23 44 33 52 548 2900 2981 2848 4322 45 22 66 28 744 99 357 32 68 33 80 470 430 22 133 156 39 23 22 28 3483 544 1104 961 2971 4

78 36 117 91 88

33.

52 33 4

39 33 88 157 52 117 96 33 24 625

<0.1 0.5 0.3 19.7 0.2 29.1 0.3 24.1 0.2 2.0 0.2 0.4 0.9 0.2 16.6

<0.1 0.2 0.3

<0.1 0.5 0.3 0.5 0.1 3.5 Percent 215 199 72 6500 5698 3378 1722 72 28 28 152 305 76 51 431 101 3111 1089 397 133 133 359 143 72 Total 3477 20362 46631 24110 9745 8339 11724 6590 17926 100.1

,)

-u-I Table 3b. 2003 Monticello Seining Study - Fish/hectare, Weighted Average, and percent of Catch for the Upstream Sector Weighted 6v11 7111 7121 8f01 8/08 8/26 9/04 Average Percent I.

Homyhead chub Bluntnose minnow Brassy minnow Spotfin shiner Bigmouth shiner Sand shiner Spottail shiner Common shiner Mimic shiner Carp Blacknose dace Silver redhorse Shorthead redhorse White sucker Northern hogsucker Trout perch Smiallmouth bass BtuegiU Logperch Johnny darter Walleye Blackside darter Shiner spp.

Moxostoma spp.

45 19 123 56 22 19 207 181 369 34 770 4551 833 1227 1665 1171 816 181 639 151 19 34 6549 20911 11500 102Z5 2124 5373 3263 123 22 38 23 249 56 19 68 22 121 it 67(

12 0.1 73 0.6 15 0.1 11 9.8 54 1.2 62 54.8 19 0.2 5

0.5 4

<0.1 4

<0.1 8

0.1 4

<0.1 18 1.7 30 4.3 73 0.6 23 23 23 246 23 6643 23 246 964 28 28 667 139 64 581 129 694 1141 76 654 566 306 448 68 69 113 804 1860 249 19 69 191 3272 861 19 207 159 69 413 1790 1599 1278 1227 1230 389 22 1107 139 22 2C 8

0.1 742 6.0 12 0.1 996 8.1 146 1.2 4

<0.1 65 0.5 350 2.8 865 7.0 5098 Total 13007 38132 16446 14855 5318 13880 8157 12330 99.8 Table 4b. 2003 Monticello Seining Study - Fish/hectare, Weighted Average, and Percent of Catch for the Downstream Sector Weighted 8/01 8/08 8/26 9/04 Average 6/11 7/11 7/21 Percent Northern pike Homyhead chub Creek chub Fathead minnow Biuntnose minnow Spotfin shiner Sand shiner Spottail shiner Common shiner Golden shiner Mimic shiner Carp Blacknose dace Silver redhorse Shorthead redhorse White sucker Bigmouth buffalo Northern hogsucker Channel catfish Banded killitish Smallmouth bass Largemouth bass Bluegill Logperch Johnny darter Walleye Yeflow perch Blackside darter Shiner spp.

Moxostoma spp.

17 23 25 45 45 69 52 123 34 246 120 2460 25 23 34 9868 7380 2988 221 1929 2411 9225 6635 1065 310 34 23 34 258 113 172 57 918 86 115 29 4

29 22 14 64 128 542 4948 1988 33 109 4

17 69 172 52 2337 103 615 123 25 25 101 354 246 17 276 11686 1975 1.

246 4

18 36 14 482 446 292 91 4

23 103 29 64 36 7

4 269 2428 430 1339 1616 32 11 23 7

23 172 142 52 259 22 4

45 88 478 55 1262

<0.1 0.2 0.2 0.1 1.1 44.0 17.7 0.3 1.0

<0.1

<0.1 0.2 0.3 0.1 2.6 0.8

<0.1 0.3 0.1

<0.1 14.4 0.1 0.1 1.3 2.3 0.2

<0.1 0.8 0.5 11.2 17 362 492 103 5904 17 34 2091 76 354 152 76 5958 Total 19939 43174 12811 4941 5837 1664 2965 11251 99.9

Tabe. Montlceib Sein Sludy *Anurw Aerage pFhler tar bfor th Upsteam Sutvey Are.

1977 1W70 1979 1980 1981 1982 1993 1984 19gs 1998 1987 9s98 1989 I99 1991 m992 1993 1994 1995 19m 1997 1998 1999 2000 2001 2002 2003 Meiw Northt mpik.

3

.0 304 3

3 9

4 27 4

1S 14.0 Ckco e

0.2 Centran slomw.r Homayhesd chub Creak chub Fa.ad midrnrow Bltlnnoe minnow Brall rninnow Spottn shiner Send shiner viner shin.r Spolal shinbr Common ehinr Mimc Shinfr Golden shinr Carp Longnov. dace Blacknose de Sle redlhorse Shorthead redhora.

While suckr BlgmoArh buffalo Northem hog*ucker Charne catfish Black buthead Yelowbulh..ad Troul perch Banded ileth Brook sacldebeck Brook liverslde Smutmoultbmas tafrganneulnhbess Black cra.ppte White crespt Flock bess okuag1 Orson esrefih Legperch Johnny dart Weasys yalboc patch Bteckskie ddrler Shho. app Moercltors aPp Contraeid Opp 3

4 4

0.4 892 10 26 lot 107 132 331 409 44 217 33 It e6 104 8

27 46 ts 19 14 es 3

77 428 12 120.7 a

3 04 24 105 s6 S

30 18 502 8

8 3

9 e1 e

11 22 7

3 eo o6.3 2948 7479 386 495 984 1434 1187 2105 2998 60os 4931 2614 2084 I7TS 6703 753 206 234 23 19 IsO 22 1061 27 872 1ts2 73 2004.0 a

s 9

4 25 II 11 44 IS 4.e 3301 1s1o s28 1082 1199 15ss 2540 6007 783 49t2 3449 7436 8473 3177 1999 718 538 432 471 2068 2031 996 3783 690 3023 5002 1211 2811.4 6724 8386 3500 10t0 371 544 295 418 1401 15s9 1923 1027 993 2790 4879 1e8s 332 335 1157 49 sse est e0o1 297 42t 889 1S4 1748.4 1414 10 3570 1398 4599 1899 3151 3910 11413 5305 2025 1537 4890 11848 1S5o0 6701 4306 2525 3777 644 501s 4430 27570 2801 10280 t9472 6762 6377.3 3090 63 4

16.9 390 28 e1 22 17 21 27 20 26 274 36 284 Ill 27 39 te 4

46 a

47 2

1t4 18 86 ts 60.1 1o7 100 e

61 147 9

as 03 6s 3

4 3

106 54 84 11e 193 104 59 1592 1es 216 es 125.2 1C3 5

s a

9 4

4 19 27 4

3 6

142 3

3 4

370 247 940 410 377 s7 476 Os 62 1360 13 6s 8e a

26 9

14 48 99 12 a

13 86 17 32 209 9

3 23 26 0o 114 203 177 9

1te 47 10 28 t9 10 622 10s II 9

3 23 9

4 II 202 12 126 29 as 22 31 127 14 2363 721 7

25 9

67 147 4

1952 2401 240 e84 leaf 455 697 135 189 515 2009 120 109 194 83 1021 36 110 s09 322 71 79 26 42 10 538 38 33 9

103 1

0 9

e s

46 9

4 10 4

7.7 4

ie 41 229 40 32 173.9 7

ee6 34 t972 70 132 a

130.5 25 22 94 130 26 4

71.0 so 389 8e 591 73 48 208 209.5 621 707 250 1524 26 26 530 M63.s 7

0.3 1a 15 14 304 7

12 73 59.7 7

0.7 0.1 18 194 9

4 424 6

428 6

152 166 3

1s 4

4 664 3

4 a

a 06.5 3

14 82 3

101 too 9

205 St 868 124 214 122 34 73 234 127 1I7 229 s58 18 383 1273 1501 9

to 9

I 9

a II 30 4

6 9

62 24 108 17 5

30 6

4 4

224 e

9o 24 490 4

449 6

402 142 28 185 387 S9o 44 406 1ss 47 206 220 18 So 31 is 1954 246 t17 1372 828 421 180 738 2099 2697 1952 St7 199 920 437 206 t97 124 77 114 9

10 8

15 31 54 3

99 37 15 6

4 4

6 42 to1 20 876 128 49 39 e8 26 35 11 337 10 61

59.

517 402 33 2600 990 3201 6243 1274 1355 6o0 Ila 126 1229 331 251 201 12 Igo 642 2874 899 1252 350 219 2152 629 732 9

30 239 206 19es t9t0 887 9

46 0.1 4

14 61 4

4 5.9 370 595 210 200 6

723 742 337.3 2.8 a

13.3 2.1 0.1 15 3

1 1 12 33.1 14 690 48 338 11 SS 99s 15.3 I6 102 313 10o 18O 72 14e 595.0 97 44 34 se 37 32 4

21.0 0.5 11 29 as 180 4

04 as 42.1 36 412 27 673 165 s599 350 898.4 220 3012 2836 288 ass 770.0 2.0 Totalflahht 22240 150O 9212 996es 12792 9920 9710 10620 29849 25381 31534 16963 19277 2a350 2901 12900 7239 8115 o004 6983 9462 13043 44164 13146 23266 29777 12330 17563 F olspeiets 20 18 18 22 19 17 28 23 19 21 20 20 19 i 24 25 17 15 19 24 25 21 24 20 22 28 22 22 39

L.-

Tab9.8. MorterI~o S.Wng Study -A~rrral Averag.fe~la¶IoeIr. hrtIhe owrrtlrerrmSuey Ares.

1977 107 1079 1980 1981 1992 1983 1984 1oss 1988 1997 l9se 1989 i990 1AM 19M A893 1994 1898 198 1997 1999 AM9 2000 2001 2002 2003 Mean Northlrnmpllr 8

10 114 8

25 8

I11 4

4 4

92 4

4 9.2 Cankaral

.onora.r Hmllse94ad clr.

178 12 10 9 2 207 144 171 180 98 478 184 94 20 113 219 a

25 28 8

a8 7

83 7

Si 2 9 215 92 29 128.0 Crook chui.

4 4

22 1.1 Fefthedminnow 25 a

12 13 22 29 103 a

202 02 8

4 28 A

4 20 S9 28 48 1 4 23.9 Olurmrra* r"rrrw 2948 1240 945 384 088 0097 SIG 1880 9728 3444 2251 2940 221 3522 8994 973 729 t48 24 32 209 1252 2250 287 824 3824 158 178.7 Brossymirdrvrw 8

A1 3

1 0 6

13 4

4 a

52 3.7 Spoiltnahl1rar 2MG 2924 1397 g08 1145 909 23358 2245 9390 9603 573 8383 8079 9420 4408 1532 893 1187 i8e 2587 1880 4804 8855 2784 8022 8219 4945 5940.2 Blororouti i&ner 1990 698

'400 28 61 127 072 187 8708 187 244 191 208 943 443 709 449 4

8 97 34 1183 12 as 92 288.2

$and ghbrar 829 448 93 2891 228 1031 2378 9427 5347 229 489 998 4314 7502 2700 4110 888 939 148 804 1199 1433 328 19490 4322 1988 2898.8 RIiver Mrser 1747 2

64.8 Spouselshlnr I I 10 94 298 164 20 so 932 es 238 19 37 62 27 Bs 89 9

9 II 2 7 22 23 88l 4

28 33 81.9 Commrronshtonlr 287 82 27 II 9 9 422 03 a

a 1 4 117 7

a 27 21 222 204 93 27 71 09 297 188 a87 909 106.9 MWnD shiner 2

4 2

3 4

A I18 4

AA Goldart shin.r

.4 A

4 4

0.9 Carp BS 90 19 5

9 18 7.0 L~onrgwooad" 98 92 29 135 998 24 148 26 28 8

13 a

4 a

17 29.0 13faclnose dace 2

17 12 9

80 24 14 a

22 9

9 78 a

144 1

32 as

.18.8 S~veredlrrse 208 7

9 22 27 16 9

7 a

6??

70 34 477 a

42 183

14.

14 02 go 97 235 22 to 14 86.2 slrortmrad Tsrdlrar 7!

9 7 27 90 Ise 8s so 13 4 7 84 868 339 124 293 9

48 198 175 71 102 901 98 99.4

¶9 1SS 292 157.9 Whit~esucker Is7 B8 239 1993 85 287 39 021 940 18 329 74 30 lot 21 1070 29 208 190 71 118 289 900 1079 4

28 of 208.1 BI~gnmaut buffalo 4

4 4

0.4 Norlleramhogsuckor 52 203 188 122 117 72 42 o1 20 84 Is 3

77 42 22 82 go 99 28 237 III 58 98.8 Channu~l c.fishr 3

8 A91 4

71.

Black brillvead 2

27 Yallowbulltrud 4

0.1 Trout perch 90 34 210 II6 089 185 270 4

7

¶00 4

99 5 1.5 Banded MMfll 4

0.9 Brook slcklotback 4

12 9

4 1.,

Oraok srerolds 6

20 8

27 4

22 9

27 3

a 8

24 0

4 922 A I

¶9 A

I 13.9 Smtmalkwlhbass 12 150 484 900 741 200 219 998 281 is 106 1228 288 247 880 9888 900 2089 1484 1804 941 1485 920 1420 89 2971 1ot9 907.9 largamoulibass 58 t9 10 27 222 48 10 9

89 12 19 0

37 A

I I 21.5 Black cripple 84 9

22 8

1 7 71 1 2 920 1 9 7

12 33 4

4 4

22 38 98.2 Wl4Ic"Apple 1 2 70 a

3 5.4 Rlock bass 72 4

a A90 28 132 3

a 9 7 4

10.4 Bkflixg 93 9 0 9

40 89 A

90 Be 82 1 2 24 t97 74 10 202 208 a

25 5

103 4

434 128 24 52 7

07.7 Green awrO.!

a 0.2 Lagerchr 648 1 0 288 998 4

289 30 414 182 10 19S 3

428 0

199 7

44 as 4

4 142 920.9 Jo" rdorarte 999 29 78 I194 44 79 23 959 990 1492 982 948 23 98 GO a1 247 901 110 02 20 49 27 96 72 70 as 289 288.5 Wavay*

a 10 a

1 1 23 9

I98 42 109 43 73 4

4 4

97 St 22 1 7.7 Yellow perchr I0 9

24 8

8 4

19 18a 4

2.9 13fockside darter 216 21 4 1 244 78 87 71 20 144 42 IS 9 00 4

20 78 993 229 4

96 88 08.9 Shkwrospy 22 9

9 82 4S7 238,092 173 9948 52286 1982 724 47 230 407 739 A3 92 29 49 999 22 28 219 825 98 407.7.

Mortartorassyp 295 so 809 280 809 20 925 818 128 73 084 1154 174 98 33 3

040 3299 349 39 1121 542 287 30 24 1292 609.0 Carmrscid spy 9

0.5 Total fliMia 12230 8979 4488 0248 7029 9018 7347 12432 28074 17158 97478 98720 99298 20384 19709 90208 9IW8 9973 4308 S0l7 5820 90814 19432 6899 23321 17926 A925 92288 el speis Io 1a A7 19i 22 A7 22 28 20 291 21 23 24 2

1 29 28 22 19 22 27 23 26 to 2S' 26 25 24 50 4

1

)

Table 7a. 2002 Monticello Seining Study - Species Composition of the Upstream and Downstream Sectors Upstream Sand shiner Spotfin shiner Bluntnose minnow Smallmouth bass Bigmouth shiner Moxostoma spp.

Hornyhead chub Shiner spp.

Common shiner Blacknose dace Fathead minnow Johnny darter Log perch Blackside darter Spottail shiner Shorthead redhorse Brassy minnow Longnose dace Walleye White sucker Northern hogsucker Black crappie Trout perch Brook silverside Percent 65.4 16.8 5.6 2.4 2.3 2.0 1.4 1.0 0.7 0.4

...0.3

- 0.2 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1

<0.1

<0.1

<0.1

<0.1 Downstream Spoffin shiner Sand shiner Bluntnose minnow Smallmouth bass Moxostoma spp.

Common shiner Shorthead redhorse Blackside darter Hornyhead chub Johnny darter Silver redhorse Bigmouth shiner Walleye Bluegill Fathead minnow Black crappie Brassy minnow Blacknose dace White sucker Spottail shiner Shiner spp.

Northern pike Log perch Largemouth bass Percent

.29.1 24.1

.19.7 16.6 3.5 2.0 0.9 0.5 0.5 0.5

- 0.4 0.3 0.3 0.3 0.3

.0.2 0.2 0.2 0.2 0.2 0.1

<0.1

<0.1

<0.1

)

F Table 7b. 2003 Monticello Seining Study - Species Composition of the Upstream and Downstream Sectors Upstream Sand shiner Spotfin shiner Log perch Moxostoma spp.

Smallmouth bass White sucker Shiner spp.

Shorthead redhorse Bigmouth shiner Johnny darter Bluntnose minnow Northern hogsucker Common shiner Blackside darter Spottail shiner Brassy minnow Hornyhead chub Bluegill Blacknose dace Trout perch Silver redhorse Mimic shiner Walleye Carp Percent 54.8 9.8 8.1 7.0 6.0 4.3 2.8 1.7 1.2 1.2 0.6 0.6 0.5 0.5 0.2 0.1 0.1 0.1 0.1 0.1

<0.1

<0.1

<0.1

<0.1 Downstream Spotfin shiner Sand shiner Smallmouth bass Moxostoma spp.

Shorthead redhorse Johnny darter Log perch Bluntnose minnow Common shiner White sucker Blackside darter Shiner spp.

Northern hogsucker Blacknose dace Spottail shiner Hornyhead chub Walleye Creek chub Carp Fathead minnow Silver redhorse Largemouth bass Bluegill Channel catfish Northern pike Yellow perch Mimic shiner Bigmouth buffalo Golden shiner Banded killifish Percent 44.0 17.7 14.4 11.2 2.6 2.3 1.3 1.1 1.0 0.8 0.8 0.5 0.3 0.3 0.3 0.3 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1

<0.1

<0.1

<0.1

<0.1

<0.1

<0.1 I

II

I I

Table 8. Species Dominance Ranking for Combined Sectors from 1976 through 2003.

Species Rank Year Bluntnose minnow Spotlin shiner 1977 1978 1979 1990 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2

3 3

4 2

4 3

3 2

3 2

3 3

2, 5

5 4

4 3

Bigmouth shiner 4

5 4

3 2

5 3

5 Sand' shiner 1

4 1

3 2

2 3

4 2

1 1

I 2

4 1

1 1

1 1

I 1

Shiner species While sucker Moxostoma species Johnny Smallmouth darter bass Logperch 4

5 5

1 4

5 2

3 5

5 4

5 3

4 4

2 3

4 5

5 5

5 5

5 5

4 I

I 2

5 5

5 4

4 1

3 3

3 3

3 3

3 2

2 4

4 3

3 5

4 4

35 5

I

' Includes both sand and bigmouth shiners from 1977 through 1979.

Table 9. Monticello Seining Study - Average number of smallmouth bass, white sucker, and Moxostoma spp. collected per acre.

Upstream

-Downstream

• Average Year Fish/ha Fish/ha Fish/ha Smallmouth bass 1977 101 12 55 1978 101 167 133 1979 9

465 246 1980 237 927 547 1981 61 741 373 1982 668 309 488 1983 124 216 183 1984 214 198 198 1985 122 291 214 1986 34 75 62 1987 73 766 427 1988 234 1228 689 1989 127 285 209 1990 117 347 234 1991 229 690 460 1992 588 1665 1105 1993 18 1805 937 1994 363 2051 1225 1995 1273 1484 1368-1996 1501 1604 1554 1997 370 841 591 1998 595 1465 1026 1999 218 820 550 2000 280 1419 789 2001 18 89 53 2002 713 2972 1842 2003 742 1616 1190 Average 338 909 620 White sucker 1977 2401 157 968 1978 240 65 128 1979 364 236 299

.1980 4003 2548 2630 1981 455 55 262 1982 697 257 482 1983 135 39 69 1984 189 921 368 1985 515 140 346 1986 0

10 5

1987 2089 329 1191 1988 132 74 105 1989 109 30 68 1990 194 101 146

)

1991 63 21 42 1992 1021 1076 1047

- ML-I Table 9. Monticello Seining Study - Average number of smallmouth bass, white sucker, and Moxostoma spp. collected per acre.

1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Average Year 36 110 509 322 621 797 258 1524 26 28 530 643 25 296 190 71 118 269 100 1076 4

28 91 308 30 205 366 192 385 535 171 1324 15 28 310 434 Average Fish/ha Upstream Downstream Fish/ha Fish/ha 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Average 405 201 103 1124 2950 693 1302 358 219 0

2153 629 732 9

36 239 206 1168 1910 897 226 3012 0

28360 589 865 847 Moxostoma spp.

494 125 179 515 814 127 1014 615 125 73 964 1154 174 86 33 407 949 3269 346 39 1121 542 0

25 30 625 1262 560 450 163 141 820 1792-379 1219 417 187 43 1546 869 442 48 35 320 588 2241 1208 448 646 1787

-o 1581 15 607 1069 706

• 1976 data from NUS 316B Study.

)

APPENDIX A.

Fish Species List Based on Seining and Electrofishing at Monticello Method

• Amiidae Bowfin Salmonidae Cisco Amia calva Coregonus artedi E

B Esocidae Northern pike Muskellunge Cyprinidae Central stoneroller Hornyhead chub Creek chub Fathead minnow Bluntnose minnow Brassy minnow Spoffin shiner Bigmouth shiner Sand shiner River shiner Spottail shiner Common shiner Golden shiner Mimic shiner Carp Longnose dace Blacknose dace No. redbelly dace Esox lucius Esox masquinongy Campostoma anomalum Nocomis biguttus Semotilus atromaculatus Pimephales promelas Pimephales notatus Hybognathus hankinsoni Notropis spilopterus Notropis dorsalis Notropis stramineus Notropis blennius.

Notropis hudsonius Notropis comutus Notropis volucellus Notemigonus crysoleucas Cyprinus carpio Rhinichthys cataractac Rhinichthys atratulus Puoxinus eos B

E I

S S

S S

S S

S S

S S

S S

S S

B S

S S

Catostomidae Silver redhorse Shorthead redhorse Greater redhorse White sucker Bigmouth buffalo Northern hogsucker.

Moxostoma anisurum Moxostoma acrolepidotum Moxostoma valenciennesi Catostomus commersoni Ictiobus cyprinellus Hypentelium nigricans B.

B E

B B

B

. I I

E-.2 Ictaluridae Channel catfish Flathead catfish Black bullhead Yellow bullhead Brown bullhead Percopsidae Trout-perch Gadidae Burbot Fundulidae Banded killifish Ictalurus punctatus Pylodictis olivaris Ictalurus melas Ictalurus natalis Ictalurus nebulosus Percopsis omiscomaycus Lota Iota Fundulus diaphanus B

E B

B E

S E

S Antherinidae Brook silverside Gasterosteidae Brook stickleback Centrarchidae Smallmouth bass Largemouth bass Black crappie White crappie Rockbass Bluegill Pumpkinseed Green sunfish Percidae Yellow perch Walleye Johnny darter Blackside darter Logperch Labidesthes sicculus Culaea inconstans Micropterus dolomieui Micropterus salmoides Pomoxis nigromaculatus Pomoxis annularis Ambloplites rupestris Lepomis macrochirus Lepomis gibbosus Lepomis cyanellus Perca flavescens Stizostedion vitreum Etheostoma nigrum Percina maculata Percina caprodes S

B B

B B

B B

E B

B B

S S

S

• S = Seining E = Electrofishing B = Both 1.