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

SUMMARY

OF THE 2002 - 2003 MONTICELLO ELECTROFISHING SURVEY Prepared by:

Xcel Energy Environmental Services I

-I I .L1

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

! -1 _ I- - - 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 )

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 21CPE 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.

-- - I I 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 Rivr.calculated he ndies from alclatd fom this study are hisstuy ae betwee '

btwen the ranges observed in the I 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.

Shortheadredhorse 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.

. I I 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.

I -

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 FreshwaterFishery Biology, Volume 1, 752 p. The Iowa State University Press, Ames, Iowa.

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

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

-i 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 11 7(l):177-1 91.

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

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BVklz ISLAND FL-A.NT SITE COOLING TcqESzZ DIS~aAkGz_

CANAL o 0.5 OXBOW ISLANDl lcio~eters

• BOAm

-' Sector 1 MOM SI--I PARK 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%

Miscellaneous 3%A Northern hogsucker

.4%

II .

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%

I Northern hogsucker I 5%

Walleye 1% I Smallmouth bass 8%

Silver redhorse 28%

White sucker 3%

f

Figure 5 Sector 2 Fish Catch Shorlhead redhorse 39%

II Channel catfish 5%.

Silver redhorse 23%

Miscellaneous 4% -

Northern hogsucker I 4% ..

Smallmouth bass Carp 13%

10%

Fiue6 Figure 6.

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

700 600 500 r

I 400 300 200 100 0

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

• Carp W~rts Sucker UShorhead Redhtorse U swmallrouUmBass

,U Silver Recftrse eWalleye 1

I -Norftrm Nogmicker tliChannel Caftih x Misc.

If 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 -

100 830 60 ,

I O , a 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 1.

500 400 L. + I I I

'II 300 -

• ~0+

IF C .0 200 -

5 4 I I

55 0

4 5,,

100 -

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

A lo

• I 10 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 11 2002-2003 Monticello Electrofishing CPE Smallmouth bass 400

-a- Upstream + - -Downstream 350 I I I I 300 II I

250 II L-i200 I

• . C I 150 100 II I I I I I

50. - II I

.+111 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

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 I-- Upstream - - - -Downstream l 100 -

A I I

II I

I 80 I

I 60 I I

L-L I

A. . A..

A 40 II.A, S .

I I I

I

, 0 ..

. . , I I ,

I ,

• 20 I I5

'A ,

II I

I /

% 'M 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

Figure 15 2002-2003 Monticello Electrofishing Length Frequency Carp 25 I lI Upstream l 20 -

19 0 Downstream 17 15 15 -

14 M 13 13 12:

I 00

)

LL 10 10 10 -

9 8'~ a 6 6 5 5 0'

5 5 5 )6 1

L 3 3 L I

22 0* _

1 Z l rn, 1i~I LSa pa I

= rAfA I.

,~t--~A IA L.-

1 1 250 270 290 310 330 350 370 390 410 430 450 470 490 510 530 550 570 590 610 630 650 670 690 710 730 750 770 1 1 Length (mm)

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

[I Upstream 127 l Downstreaml 120 110 100 C,

C: 83 0) 03 80 Ea) 35 60 52 4515 MI' 40 36 PA 32 27 2C . 22 20 - 16 17 j 12 98 : S,, 165 6

i 1 1

,0 l ,..

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 -

R2 psream 0 Dowstreamj 80 70 60 57 C) 52 a) 50 io I ) 45 IL 40 -

30 -

27 20 19 14 14 11 2 12 10 -

687 9 5

3 5 5 ~~4 3 p-I 3 . S S 0

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

Figure 18 2002-2003'Monticello Electrofishing Length Frequency White sucker 12 l Upstream l l Downstream 10 8

7 Is C 6 0) 1 4 2

0* 01t l 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 a0 a) 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 14 - l Upstream bDownstream 12 10 C:

a) 8 8 a,

L. 7 Li.

6-5 5 5 4 4 4.

3 3 2 2 2 2 2 2

1 a

0 .

130 150 170

~I_

190 210 230 IIRE 250 270 290 310 330 350 370 390 410 430k I

450

,1.

fsXAes!cCB~

470 Length (mm)

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 -

0 D0 800 - + + a E

600 +

II C,3 400 -

200 - Upstream R2 0.5406 Downstream FR20.2785 0 I I I I

l .

I 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 96/97 00/01 o0 Upstream + Downstream - Upstream .Downstream

Figure 24 Trend in Annual Mean Weight 1800 Silver redhorse Upstream R2 = 0.3815 Downstream R2 = 0.6301 1600 a W +

1400 -

1200 - o +

lb

+

1000

+

cn 3- +

E I i2 + I E

800

-3 + III 13 + 13 600 -

01

+

400 -

+

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

. lz Figu're'25 I

Trend in Annual Mean Weight White sucker 1600

+

1400 1200 1000

+ 0 ci E 800 Cd I I-600 -

+

400

+ +

Upstream R2 =0.5511 200 Downstream Fl2 = 0.0062 I II I II 0 I I I I C I 1976 1978 1980 1982 1984 1986 1988 1990 . 1992 1994 96/97 00/01 o0 Upstream + Downstream -Upstream . Downstream I

I,

---

I--

Fiu.re 26 Trend in Annual Mean Weight 600 Smallmouth bass Upstream R2 = 0.4309

+

Downstream R2 = 0.3388 03 0

500 03 El 03 03 400 -

1+

E WE300 -

03 + , + +

'';AD ++ ++

0

+ 0 03 200 - 03

+ +

a r3 100 03 0 I I I II - I I- p I 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 Waif eye 2500 2000 an

.1 R 1500 (D

1000 500 0*

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 900 13 800 0 I 03 o ., '

03 700 03

+ 0 0 cl 600 + + h WJ E I Wt 500 I O.

0 400 03

. 1. J3 -'." " +

300 Upstream R2 = 0.706

+

+ Downstream R2 = 0.5229 200 E 0

03 100 I

0 I I I S I S 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

~

I I

100 50 0

1976 l a Upstream 2003

+ Downstream Upstream .- Downstreaml

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

+ 2 Downstream R = 0.0251 1000 800 +

1 + + + + + +

600 c -

+

+ + + +

+ ++ 3 + +++

+ + +3 0 +

400 - + + 0+ + + +43

+ 0 + +0 0 3

++ + 0+ ++ O H- ++ E3 ++% + +

+ + + 0+0. 0 200 0 E

CL

-34t 3 4+-b-0 +00+

[ t% +3E31

+7 20030 u -Jj- 0 i, 0 n +F ~0I 00+/- 13~

13 + .3I po M3 0 Eli 1976 2003 o

0 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+0

+ 0 3++ 3

+

+o +

+

0 +

q 4+

200 0. + 0+ + 0 *+ + a a a +d*

D+ .Mn+ * +3+-0

+ 0+J:

100 + +T3E D13 +CCP 1 +~ lb'Pr +0 +-

+ 0 + 13 + 03 0 0 1976

-. .T - .2003f........ l 1976 2003b13OP 0 Upstream + Downstream Upstream .- Downstream

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

90 80 70 60 U- I 50 40 30 20 10 - to 1.76 1 976 2003 l 0 Upstream + Downstream Upstream -.-.-. Downstreaml

Figurgi33' Trend in Monthly CPE by Sector Smallmouth bass 400 Upstream R2 = 0,0007 Downstream R2 = 0.0039 +

350 -

+

300 -

+

250 -

L.

+

I . i 200- ++

I is 0 +

++

+ +

150 A +

03

+

+ +

+

100- _+° + +

03 1 + ++

+ ++ p 0 03 + 0 10 + 0++ + + +, + +

50 03 +

r1. + _ + i~~Di +201 di,

n. IL

.A; ....

.. .1 . ...

, I,,-....-,;.-2.A... .... qtd4

. , I

+t..

1976 2003 l a Upstream + Downstream Upstream - Downstream

Figure 34 Trend in Monthly CPE by Sector 100~

Walleye 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 *+ ++ + + + +

43+20 - APO °l a++

60- + +

+0 0 a+ .+

,3 .%+ 1 1

+a O* +

0-0+I+0 rp 0+1- +3 +

03 *~r=4 ' ~LIo Li +0 03 + + EbC3 0GO-P 1 +0 13d3 Ir .... 001 0 III II111*II*I, ,sS I I #It I Iit I I I IIII,, II U I I I t I I I I I I I I I III 1981 2003 n0 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 E0 1 ii1 4,000 ;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. 1970 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 x x x x x x Cisco 'C Northern pike C 'C 'C 'C 'C ' X 'C 'C ' x x x x C 'C C 'C C 'C 'C '

Muskellunge 'C Shorthead redhorse 'C 'C 'C ' 'C ' x C 'C 'C ' 'C 'C ' 'C 'C ' x 'C ' 'C 'C 'C x Silver redhorse 'C 'C 'C ' 'C ' x C 'C 'C ' 'C 'C ' 'C 'C ' xx 'C ' 'C 'C 'C x Greater redhorse 'C *' 'C ' C 'C 'C ' 'C 'C ' 'C ' x 'C 'C 'C While sucker 'C 'C 'C ' 'C ' x x 'C 'C ' 'C 'C ' 'C 'C ' x 'C 'C 'C

'C x Blgmouth buffalo 'C 'C 'C x 'C 1Ix 'C ' 'C ' x 'C 'C 'C

'C x Northern hogsucker 'C 'C 'C ' 'C ' x C 'C 'C ' 'C 'C ' 'C 'C ' x 'C .'C 'C 'C 'C 'C x

Carp 'C 'C 'C ' 'C ' C 'C 'C ' 'C 'C ' 'C 'C *x x 'C ' 'C 'C 'C x

Channel catfish 'C 'C ' 'C 'C ' x 'C ' 'C 'C 'C Flathead caltish 'C Black bullhead 'C 'C 'C *' x x x C 'C 'C ' x x 'C

'xC Yellow bullhead C 'C 'C ' 'C Brown bullhead 'C Burbol 'C ' C 'C C 'C 'C ' 'x 'C 'C '

Smallmouth bass 'C ' 'C 'C ' 'C C 'C C 'C 'C ' 'C C 'C C 'C C 'C C 'C 'C ' x Largemouth bass 'C 'C 'C Rock bass 'C ' 'C 'C C 'C 'C ' x C 'C 'C ' x x x x x x 'C ' 'C '

Bluegill 'C 'C 'C 'C 'C 'C x 'C 'C 'C 'C Black crapple 'C ' 'C 'C C 'C 'C ' 'C 'C 'C ' 'C 'C 'C 'C ' 'C '

White crapple 'C Pumpkinseed 'C Green sunlish 'C 'C 'C Walleye 'C 'C ' 'C ' 'C 'C 'C 'C 'C I 'C ' 'C C 'C C 'C C 'C 'C ' 'C '

Yellow perch '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.

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

• Sector 1 1968 50.7 34.5 4.4 2.7 1.5 4.8 1.4 1969 29.4 48.6 7.4 4.5 1.8 2.0 6.3 1971 .25.3 36.9 9.1 13.1 7.6 7.1 0.9 1972 45.1 26.1 9.1 4.1 7.0 1.1 7.5 1973 39.9 34.8 13.0 4.9 2.0 0.7 4.7 1974 44.3 20.3 16.7 9.2 1.5 0.1 7.9 1975 53.5 27.0 9.3 3.7 0.9 0.5 5.1 1976 41.0 36.4 12.3 3.5 3.4 1.4 20 1977 19.6 40.3 12.7 3.4 20.4 0.8 0.3 2.5 1978 15.4 32.2 26.4 5.0 15.4 0.5 0.2 4.9 1979 15.2 43.4 29.5 5.5 4.3 0.2 0.1 zo 1980 11.4 51.0 26.2 4.8 1.6 0.6 0.9 3.5 1981 9.7 34.9 38.1 5.2 6.6 0.7 3.1 1.7 1982 9.8 41.7 31.9 6.4 5.0 1.3 2.0 20 1983 10.2 38.6 38.1 5.3 2.5 0.6 2.1 2.6 1984 8.4 41.7 39.9 4.1 1.4 0.7 2.2 24 1985 7.9 48.6 335 3.3 1.1 0.5 4.2 0.8 1986 3.0 54.8 30.6 2.4 1.6 0.3 6.2 1.1 1987 6.8 47.8 34.8 0.9 1.8 1.5 5.5 0.9 1988 14.4 40.4 23.0 1.0 11.3 2.5 5.3 0.1 2.0 1989 16.4 37.9 25.2 1.0 6.9 1.2 9.0 1.5 0.9 1990 8.3 49.4 25.8 1.6 4.4 0.5 8.0 0.6 1.4 1991 7.6 50.1 29.8 1.4 3.2 0.8 5.8 1.2 0.1 1992 13.5 37.9 33.4 1.8 4.8 1.1 5.0 1.6 1.0 1993 7.9 43.5 35.4 2.6 3.0 1.2 5.5 0.4 0.6 1994 12.3 42.8 33.6 2.6 2.3 0.7 3.8 1.0 0.9 1995 13.3 37.3 32.2 1.7 5.1 1.2 4.7 3.5 1.0 96/97 7.2 51.2 28.5 Z6 3.6 0.7 2.5 3.0 0.7 98/99 11.3 37.6 33.6 3.5 6.1 0.8 2.8 3.1 1.2 00/01 13.9 40.7 26.2 2.0 6.8 0.9 2.4 5.1 2.0 1 02/03 13.1 41.0 24.4 2.6 8.7 1.4 4.6 2.7 1.5 MEAN 18.9 40.3 25.0 3.8 5.0 1.2 3.7 2.0 24 Sector 2 1968 34.3 58.9 2.9 3.0 0.4 0.3 0.3 1969 17.3 65.1 9.6 4.8 2.0 1.2 0.4 1971 27.2 35.9 7.8 6.3 12.6 6.8 3.4 1972 38.4 33.4 8.2 3.3 5.9 2.0 8.8 1974 31.2 41.3 11.5 4.0 2.9 1.2 7.9 1975 47.0 22.6 15.2 6.4 0.9 0.6 6.4 1976 40.8 37.6 10.8 1.9 3.8 1.3 0.2 3.6 1977 32.4 40.1 12.6 1.6 9.3 1.5 0.3 2.2 1978 21.2 33.1 15.3 21 22.8 1.0 0.3 4.3 1979 11.3 30.3 31.3 3.8 16.5 0.6 0.1 6.1 1980 9.4 49.7 26.9 4.0 5.3 0.3 0.1 4.4 1981 8.7 50.8 29.2 Z9 4.8 0.3 1.1 2.2 1982 5.2 41.8 37.1 3.3 5.7 1.1 5.1 0.7 1983 5.2 45.4 33.0 4.5 3.2 0.4 6.1 2.3 1984 6.2 46.8 33.7 2.4 3.8 1.2 5.3 0.6 198.4 5.7 46.1 37.8 2.9 0.8 0.3 5.4 1.4 1986 6.2 41.8 29.4 25 2.1 0.4 16.6 1.0

• 1986 2.3 47.2 28.7 2.3 2.4 0.1 ,16.4 0.6 1987 7.9 44.6 29.4 0.7 7.9 2.6 5.7 1.2 1988 142 38.9 21.4 0.2 14.0 1.9 5.9 - 0.7 2.8 1989 10.8 42.5 25.9 0.8 8.3 0.4 10.2 0.4 0.7 1990 7.2 48.5 28.4 0.6 4.4 0.6 7.6 2.2 0.5 1991 10.3 48.4 26.8 0.7 4.9 0.6 - 7.0 0.6 0.5

. 1992 19.6 42.6 21.6 1.8 5.1 0.7 4.6 3.5 0.5 1993 15.2 38.9 29.4 2.2 3.4 0.9 8.4 0.9 0.8 1994 13.2 45.7 29.3 1.6 20 0.8 5.7 1.2 0.5 1995 14.2 39.1 31.3 1.3 6.3 1.0 4.9 1.7 0.2 96197 7.6 49.4 28.5 1.2 5.5 0.5 4.0 . 2.8 0.4 98/99 122 38.8 272 0.6 9.5 1.1 4.3 4.9 1.5 00101 13.2 46.8 20.7 1.2 10.6 0.8 1.8 3.5 1.7 02/03 10.4 39.9 19.2 0.9 13.6 1.6 4.4 5.6 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).-

Carp Shorthead Redhorse Silver Redhorse White Smallmouth Sucker Bass Northern Walleye Hogsucker Channel Catfish Misc. Total II Sector 1 5124/02 31.3 127.3 212.2 17.9 24.6 0.0 24.6 11.2 6.7 455.6 7/30/02 82.5 148.0 152.8 9.7 38.8 4.9 17.0 2.4 2.4 458.5 9/17/02 10/14/02 5/28/03 51.4 15.8 70.7 203.1 285.9 96.6 133.1 38.3 195.5 9.3 9.0 9.4 70.0 24.8 18.8 2.3 11.3 7.1 28.0 9.0 23.6 30.4 2.3 11.8 11.7 9.0 9.4 539.3 405.3 442.9 1

7130/03 94.5 135.3 104.7 20.4 25.5 2.6 17.9 5.1 0.0 406.0 929/2003 49.4 235.4 34.2 11.4 30.4 11.4 34.2 22.8 3.8 432.9 F 10/27/03 6.6 69.2 0.0 6.6 42.8 0.0 6.6 6.6 6.6 144.9 Sector 2 5/24/02 69.9 376.1 472.8 21.5 37.6 5.0 16.1 96.7 5.4 1101.1 7130/02 35.4 230.0 84.0 4.4 44.2 0.0 22.1 8.8 4.5 433.5 9/17/02 82.0 135.3 131.2 0.0 159.9 0.0 53.3 45.1 20.5 627.3 10/14/02 35.1 582.4 130.5 5.0 366.5 402 95.4 45.2 85.4 1385.8 5/28/03 31.4 161.4 286.9 9.0 31.4 4.5 31.4 35.9 40.3 632.1 7/30/03 146.8 211.0 192.6 9.2 27.5 0.0 9.2 18.3 32.1 646.6 929/2003 65.1 148.3 21.7 10.9 21.7 7.2 7.2 43.4 18.1 343.7 10/27/03 54.4 255.0 17.0 0.0 30.6 20.4 3.4 0.0 17.0 397.7 Table 4. 2002-2003 Monticello Electrofishing Catch per Unit Effort by Weight (kglhr.).

Shorthead Silver White Smallmouth Northern Channel Sector 1 Carp Redhorse Redhorse Sucker Bass Walleye Hogsucker Catfish Misc. Total 5/24/02 90.2 113.8 314.4 19.7 14.7 0.0 132 8.4 26.5 600.8 7/30/02 202.8 141.2 244.0 9.1 20.9 6.2 8.4 1.9 0.9 635.4 9/17/02 108.3 208.3 155.7 9.2 24.3 0.1 17.3 60.3 9.2 592.9 10/14/02 49.9 292.9 54.0 9.4 11.3 0.9 5.6 8.6 0.5 433.1 5/28/03 160.1 85.6 287.1 11.1 11.6 2.2 15.5 26.7 4.9 604.7 7/30/03 140.7 129.2 156.8 17.7 17.7 0.4 13.9 8.7 0.0 485.1 II 929/2003 124.6 258.2 61.4 11.4 14.7 2.2 30.8 53.0 19.8 576.1 10/27/03 13.8 76.6 0.0 3.6 24.5 0.0 4.9 1.0 11.9 136.3 Sector 2 5/24/02 134.1 268.9 693.0 17.4 24.0 82 6.5 124.2 29.8 1306.1 7t30/02 77.6 213.7 136.8 3.9 13.8 0.0 10.3. 7.7 19.3- 483.1 9/17/02 100.9 132.0 192.8 0.0 19.8 0.0 34.2 35.5 42.3 557.5 10/14/02 41.9 453.7 174.8 4.3 80.5 10.5 57.5 41.1 39.4 903.8 5/28/03 54.7 116.7 437.1 6.5 24.0 22 20.4 51.0 26.4 739.0 7130/03 164.9 196.8 339.7 6.7 17.9 0.0 8.1 33.6 25.0 792.7 929/2003 66.0 141.4 32.1 11.0 8.3 8.1 4.3 15.4 27.4 314.1 10/27/03 57.4 197.1 20.3 0.0 12.7 15.0 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 White SmaIlmouth Walleye Northern Channel Misc.

Redhorse Redhorse Sucker Bass Hogsucker Catfish Total Sector 1 1976 67.4 59.9 20.3 5.8 5.7 2.4 32 164.7 11977 61.3 126.1 39.7 10.5 63.6 2.4 12 8.9 313.7 1978 51.6 108.1 88.5 16.6 51.7 1.7 0.7 16.5 335.4 1979 493 140.9 95.8 17.9 13.9 0.5 0.3 6A 325.0

-1930 38.0 168.7 84.0 16.1 53 2.3 3.4 11A 3292 1981 44.8 167.5 1732 25.1 31.1 3.3 14.3 7.6 465.9 1982 47.5 207.3 155.0 31.6 24.2 6.2 9.6 92 490.6 1983 45.1 1792 170.5 24.4 11.4 2.8 9.3 12.4 455.1 1984 33.8 173.1 155.6 16.6 5.9 2.7 9.5 7.1 404.3 1985 34.0 218.0 148.1 14.4 4.7 2.3 17.8 3.3 442.6 1986 142 224.7 142.4 10.3 6.1 1.2 262 4.9 430.0 1987 21.1 148.8 108.5 2.7 5.5 4.7 172 7.4 315.9 1988 53.6 150.7 85.s 3.8 42.0 9.2 19.8 0.3 7.4 372.6 1989 66.0 152Z1 101.0 3.8 27.6 5.0 36.1 6.1 3.5 4012 1990 33.2 197.2 102.9 6.6 17.6 2.1 32.1 2.4 5.4 399.5 1991 35.1 231.9 137.6 6.3 15.0 3.9 26.8 5.5 0.4 4625 1992 68.3 192.0 169.0 9.0 24.1 5.8 252 8.3 4.6 5063 1993 37.6 206.1 167.9 12.3 14.0 5.6 26.0 1.8 2.9 4742 1994 50.5 177.0 147.0 11.3 9.3 2.8 16.0 4.1 3.5 421.5 1995 42.3 118.4 102.0 5.4 16.1 3.9 14.9 11.0 3.1 317.1 9"97 33.0 2342 1305 11.8 16.5 32 11.5 13.8 3.3 ,457.8 999 52.1 173.8 154.9 16.1 28.3 3.7 13.1 14.3 5.5 461.8 00101 62.7 183.4 1182 9.1 30.8 4.3 10.7 22.8 8.8 450.8 02M3 51.0 163.4 1172 11.9 34.3 4.8 19.9 112 6.4 420.1 MEAN 45.6 170.9 121.5 12.5 21.0 3.6 15.7 8.5 6.4 400.8 Sector 2 1976 77.0 952 29.9 3.8 222 3.5 0.4 6.0 238.0 1977 79.3 123.8 572 7.8 852 3.8 12 17.3 375.6 1978 67.7 181.7 187.6 23.0 99.0 3.3 0.8 36.5 599.6 1979 43.0 226.8 122.6 18.3 24.3 1.3 0.7 19.6 456.6 1980 . 49.4 293.2 164.5 15.5 29.4 2.1 7.1 16.6 577.8 1981 31.6 278.3 232.5 20.7 37.5 72 34A 3.9 646.1 1982 38.1 3302 238.4 31.6 23.9 2.7 43.7 162 724.8 1983 572 457.5 324.8 22.5 36.0 11.8 49.6 6.0 965A 1984 38.4 309.4 259.5 19.9 5.4 2.0 35.9 7.5 678.0 1985 41.0 2752 194.7 162 14.0 2.8 110.4 6.0 660.3 1986 122 281.3 155.8 11.0 12.8 0.6 87.6 2.4 563.7 1987 38.7 2172 143.0 3.6 38.7 12.7 28.0 5.0 .486.9 1988 78.0 213.6 117.3 1.1 76.9 10.5 3Z6 3.9 152 649.1 1989 58.1 228.9 139.5 4.3 44.7 2.4 55.1 2.4 3.0 538A 1990 45.3 304.4 177.8 3.5 27.7 3.5 47.7 13.5 3.6 627.0 1991 65.7 307.8 170.5 4.6 312 4.0 44.4 4.0 53 637.5 1992 149.5 324.7 164.8 13.9 38.9 5.6 34.8 26.4 42 762.8 1993 123.9 316.6 238.9 18.0 27.6 - 7.1 68.1 7.7 5.6 813.5 1994 80.4 287.6 186.9 9.4 11.1 4.7 33.9 7.5 3.4 824.9 1995 73.0 201.5 161.4 6.6 32A 4.9 252 8.8 1.0 514.8 9697 49.6 320.3 184.7 8.1 35.8 3.5 26.0 17.9 2A 648.3 9899 84.3 269.1 188.3 4.0 65.8 7.5 29.5 34.1 1OA 693.0 0001 84.0 298.1 131.8 7.4 S7.5 4.8 11.2 -22.3 10.6 637.7 02J03 64.8 2512 151.0 7.0 84.1 5.8 27.8 . 34.3 27.3 653.3 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 Silver White Srnallmouth Walleye Northern Channel Misc.

Redhorse Redhorse Sucker Bass Hogsucker Catfish Total Sector 1 1976 97.5 46.1 23.3 4.2 1.6 0.6 1.7 175.0 1977 103.6 109.4 64.4 5.7 13.0 1.1 4.6 301.8 1978 74.8 70.2 47.2 6.0 9.0

• 0.3 3.9 211.4 1979 68.3 91.8 57.1 8.1 32 0.4 5.6 232.5 1980 57.0 114.8 58.8 9.3 1.8 0.4 0.7 4.2 247.0 1981 64.8 130.5 1272 132 2.8 0.7 2.1 7.5 348.8 1982 63.4 168.2 110.6 19.0 3.6 1.4 3.6 8.5 378.3 1983 61.7 153.4 134.7 14.5 2.9 02 4.7 26 374.7 1984 49.1 1542 141.5 11.5 1.7 0.9 42 1.8 364.9 1985 42.3 186.0 141.5 10.9 1.5 12 82 4.4 396.0 1986 20.6 185.3 125.4 7.4 1.0 0.7 17.0 9.3 366.7 1987 37.4 132.3 1082 2.0 2.8 1.0 122 1.1 297.0 1988 92.9 137.0 105.2 2.3 6.8 2.3 11.9 0.1 4.1 362.6 1989 103.4 114.5 11.7 2.2 5.9 1.8 20.9 6.0 3.7 371.1 1990 55.4 155.1 116.4 4.3 5.8 0.6 23.7 1.4 6.5 3692 1991 62.1 179.1 156.4 4.0 3.8 0.8 21.6 6.0 1.1 434.9 1992 ' 110.4 158.3 199.8 5.8 4.8 1.4 22.5 9.1 5.1 5172 1993 53.8 179.7 206.8 8.6 5.8 4.0 20.0 2.6 6.9 4882 1994 91.4 169.5 172.6 8.8 4.7 02 13.1 5.9 52 471.4 1995 78.2 118.0 131.0 3.8 5.1 1.5 11.3 19.6 32 371.7 96/97 58.4 216.3 162.9 9.2 8.6 12 8.3 29.0 4.5 498.4 98/99 103.7 167.3 217.4 13.5 152 0.9 10.1 29.8 4.1 561.9 00/01 126.6 183.2 170.4 8.1 13.5 2.8 7.3 412 7.3 560.4 02)03 113.2 162.6 170.6 11.7 172 1.5 13.1 20.3 8.8 519.0 MEAN 74.5 145.1 127.6 8.1 .5.9 12 11.8 142 4.8 384.2 I,

Sector 2 i 1976 752 89.0 34.4 2.9 4.5 1.4 1.4 208.8 1977 99.7 85.7 61.9 11.7 15.6 2.1 Z5 2792 1978 86.0 1062 60.4 7.0 17.4 2.6 6.0 285.6 1979 53,1 145.5 69.8 7.9 6.0 0.6 7.6 290.5 1980 49.1 196.9 802 92 9.6 0.9 2.0 4.2 3521 1981 38.7 206.1 158.6 13.9 8.6 1.9 9.0 5.0 441.8 1982 41.7 2362 189.0 16.7 4.1 1.4 14.8 9.6 513.5 1983 64.7 329.6 258.1 12.6 9.3 6.3 24.3 2.0 706.9 1984 48.8 268.5 2412 13.3 1.4 0.4 18.3 10.1 602.0 1985 46.6 221.5 175.4 11.8 3.5 3.7 48.4 8.8 519.7 1986 18.8 225.3 135.7 8.0 2.4 1.5 52.0 6.9 450.6 1987 50.7 180.6 136.8 2.7 7.5 4.8 16.7 6.3 406.1 1988 107.9 165.0 136.3 1.0 12.0 2.4 19.9 2.5 5.4 452.4 I.

1989 77.0 164.5 171.5 1.4- 10.9 0.6 31.1 3.0 3.4 463.4 1990 62.7 201.4 185.0 1.7 7.8 12 30.1 13.0 32 506.1 1991 85.4 237.2 190.6 2.1 8.8 3.0 35.0 42 4.4 570.7 1992 141.9 256.6 196.7 10.2 9.7 24 32.6 24.4 7.7 6822 1993 155.2 269.6 289.0 13.4 9.6 3.7 47.5 . 10.1 7.1 8052 1994 119.1 260.6 221.9 6.0 6.3 1.9 25.1 7.7 52 653.8 1995 109.3 198.7 206.4 5.1 9.4 3.7 18.6 14.1 2.1 567.4 96/97 78.9 278.8 234.9 6.3 10.4 2.8 20.0 28.3 0.4 660.8 98/99 154.4 232.3 272.9 3.5 232 3.3 202 54.8 15.5 780.1 00/01

• 148.5 247.6 189.6 6.1 30.1 2.2 6.1 22.4 19.9 672.5 02/03 85.0 207.3 229.3 5.8 23.4 5.8 16.9 34.6 26.0 834.1 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 Specdes.

Shorhead S~ver While Smrnallrouh Nortiem Channel Carp Redhorse Redhorse Sucker Bass Waneye Hocsucker Catfish MIsc Total Sector 1 1976 1447 770 1148 724 281 250 531 1063 1977 1690 868 1622 543 204 458 3033 517

• 963 1978 1450 649 533 361 174 176 167 236 629 1979 1345 652 596 453 230 800 830 875 716 1980 1500 680 700 578 340 174 206 368 750 19B1 1446 779 734 525 90 212 147 987 747 1982 1335 811 714 601 149 226 375 924 771 l983 1368 856 790 594 254 71 505 210 823 1984 1453 891 909 693 288 330 442 254 903 1985 124S 853 955 757 319 522 461 1333 *895 1986 1451 825 881 718 164 583 649 1898 853 1987 1773 889 997 741 509 213 709 149 940 1988 1733 909 1226 605 162 250 601 830 554 973 1989 1567 753 1116 579 214 360 579 984 1057 925 1990 1669 787 1131 652 330 286 738 583 1204 924 1991 1769 772 1137 635 253 205 806 1091 2750 940 1992 1616 824 1182 644 199 241 893 1096 1109 1022 1993 1431 872 1232 699 414 714 769 1444 2379 1030 1994 1810 958 1174 779 505 71 819 1439 1486 1118 1995 1849 997 1284 704 317 385 758 1782 1032 1172 9697 1770 924 1248 780 521 375 722 2101 1364 1089 98/99 1992 962 1403 840 507 244 770 2082 745 1217 0001 2019 999 1442 890 438 651 682 1807 830 1243 995 1456 983 501 313 658 1813 1375 1235 Oz3 2220 MEAN 1670 826 1014 634. 273 317 654 1683 740 935 Sector 2 1976 977 935 1151 763 203 400 233 877 1977 1257 692 1082 1500 183 553 145 743 1978 1270 584 322 304 176 788 164 476 1979 1235 642 569 432 247 462 388 606 1980 994 672 488 594 327 429 282 253 -609 1981 1225 741 682 671 229 264 262 - 1282 684 1982 1094 715 793 528 172 519 309 593 708 1983 1131 720 795 560 258 534 490 330 732 1984 1271 868 929 668 259 200 510 1347 888 80S 901 728 .250 1321 438 1467 787 1985 1137 1986 1541 801 871 727 188 2500 594 2875 799 1987 1310 831 957 750 194 378 596 1260 834 1988 1383 772 1162 909 156 229 610 641 355 824 1989 1325 719 1229 326 244 250 564 1250 1133 861 1990 1384 662 1040 486 282 343 631 963 889 807 1991 1300 771 1118 457 282 750 788 1050 830 895 1992 949 790 1194 734 249 429 937 924 1833 894 1993 1253 852 1210 744 348 821 698 1312 1268 990 1994 1481 9g6 1187 638 568 404 740 1027 1529 1046 1995 1497 986 1279 773 290 755 738 1602 2100 1102 96/97 1591 870 1272 778 291 800 769 1581 167 1019 98/99 1831 863 1450 854 350 438 685 1607 1490 .t126 00/01 1768 831 1439 824 446 458 545 1004 1877 1055 0203 1312 825 1519 829 278 1000* 608 1009 952 97t 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 Silver White Smallmouth Northern Channal Carp redhorse redhorse sucker bass hogsucker Catfish Length 1 2 1 2 1 2 1 2 2 1 2 1 2 40-59 60-79 80-99 100-119 1.249 0.87 120-139 0.932 1.261 1.066 140-159 0.729 0.558 0.838 1.03 1.012 160-179 1.463 0.967 180-199 1.175 1.085 200-219 1.285 1.128 1.124 0.611 220-239 0.945 0.881 1.26 1.116 1.112 0.668 0.681 240-259 260-279 1.357 1.416 0.96 0.921 1.067 1.156 1.073 1.296 1.409 1.209 1.197 1.086 1.136 1.013 0.879 0.643 0.655 I

280-299 1.264 1.006 1.096 1.052 1.32 1.18 1.162 1.087 0.76 300-319 1.425 1.119 1.028 1.05 0.997 1254 1.3 1.188 1.243 1.088 0.743 320-339 1.273 1.33 1.063 1.03 1.002 1.033 1.327 1.265 1.111 1.185 0.781 340-359 1.283 1.235 1.072 1.03 1.212 1.096 1.29 1.182 1.165 1.169 0.95 0.776 360-379 1.304 1.23 1.009 1.058 0.897 1.006 1.113 1.34 1.297 1.134 1.115 0.753 380-399 1.237 1297 1.062 1.04 1.073 1.197 1.339 1.23 1.171 1.223 0.601 400-419 1.369 1.262 1.076 1.08 1.182 1.132 1.224 1.476 1.366 1.247 1.284 1.114 420-439 1.295 1.22 1.08 1.08 1.112 1.173 1.203 1.131 1.4 1.162 1.196 0.947 0.793 440-459 1.446 1.279 1.054 1.037 1.106 1.115 1.116 1.164 1.387 1.175 1.239 0.795 460-479 1.37 1.272 1.036 1.067 1.155 1.178 1.172 1.406 1.459 0.922 480-499 1.305 1.185 1.027 1.038 1.153 1.144 1.097 1.335 1.523 1.511 0.951 0.965 500-519 1.368 1.272 1.015 1.055 1.132 1.148 0.926 1.414 1.606 0.9 520-539 1.293 1.329 1.056 1.04 1.151 1.163 0.94 0.88 540-559 1.317 1.286 1.161 1.177 0.992 0.941 560-579 1.288 1.288 0.855 1.133 1.166 0.957 1.065 580-599 1.307 1.082 1.073 1.109 0.969 0.958 600-619 1.276 1.18 1.066 0.914 620-639 1.313 1.173 1.065 640-659 1.4 1.309 1.095 1.053 660-679 1.28 1.372 1.176 680-699 1.447 700-719 0.967 720-739 1.005 740-759 1.121 1.213 0.986 760-779 1.366 780-799 800-819 820-839 1.14 840-859 860-879 880-899 900-919 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 Shorthead Silver White Smallmouth Northern Channel Carp redhorse redhorse sucker bass hogsucker catfish Year 1 2 1 2 1 2 1 .2 1 2 1 2 1 2 1976 1.31 1.37 1.10 1.04 1.18 1.18 1.30 1.15 1.47 1.59 1977 1.34 1.35 1.14 1.15 1.19 1.20 1.17 1.14 1.55 1.43 1978 1.35 1.33 1.00 0.99 1.10 1.09 1.14 1.08 1.31 1.31 1979 1.27 1.28 0.99 0.97 1.04 1.05 1.12 1.19 1.39 1.29 1980 125 1.36 1.11 1.12 1.14 1.15 1.15 1.18 1.48 1.43 1.28 1.21 1981 1.31 1.28 1.06 1.09 1.12 1.11 1.12 1.24 1.41 1.36 1.14 1.36 1982 1.27 127 1.07 1.06 1.11 1.09 1.15 1.17 1.42 1.39 1.37 1.28 1983 1.31 1.31 1.06 1.08 1.08 1.11 1.15 1.14 1.35 1.33 1.14 1.21 1984 - 126 1.31 1.13 1.16 1.11 1.15 1.22 1.21 1.53 1.57 1.26 1.33 1985 1.21 1.24 1.07 1.04 1.06 1.06 1.10 1.11 1.40 1.35 1.16 1.19 1986 1.24 1.18 1.02 1.03 1.02 1.01 1.09 1.08 1.39 1.52 1.27 1.34 1987 1.33 1.28 1.08 1.08 1.11 1.07 1.17 1.18 1.53 1.50 1.15 1.14 1988 1.30 1.31 1.13 1.13 1.16 1.12 1.11 1.04 1.41 1.35 1.20 1.24 1989 1.22 1.24 1.05 1.06 1.14 1.13 1.17 1.18 1.39 1.39 1.14 1.18 1990 1.29 1.29 1.05 1.06 1.11 1.10 1.21 1.28 1.36 1.41 1.22 1.15 1991 1.26 1.34 1.05 1.06 1.11 1.09 1.15 1.21 1.35 1.40 1.18 120 1992 1.34 1.35 1.08 1.06 1.14 1.13 1.24 1.28 1.41 1.33 1.22 1.23 1993 1.34 1.35 1.00 1.08 1.11 1.08 1.15 1.22 1.38 1.42 1.17 1.27 0.91 0.82 1994 1.30 1.30 1.16 1.11 1.08 1.09 1.16 1t11 1.40 1.43 1.18 1.17 0.74 0.89 1995 128 1.26 1.06 1.09 1.09 1.13 1.07 1.15 1.40 1.30 1.13 1.15 0.83 0.86

- 96197 129 1.24 1.04 1.03 1.05 1.10 1.09 1.07 1.37 1.37 1.17 1.15 0.99 0.88 98"9 129 1.30 1.02 1.03 1.10 1.12 1.12 1.09 .1.31 1.30 1.12 1.15

• 0.94 0.92 00/01 1.31 1.29 1.04 0.98 1.19 1.08 1.10 1.09 1.40 1.26 1.10 1.06 0.96 0.86 02/03 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 Average 1.29 1.30 1.06 1.06 1.11 1.11 1.15 1.16 1.41 1.39 1.19 1.21 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 Log Formula Length Range # of Points Carp Log W = -4.888 + 3.000 Log L 240 to 779 264 Shorthead redhorse Log W = -5.207 + 3.085 Log L 140 to 579

• 909 Silver redhorse Log W = -5.332 + 3.144 Log L 220 to 599 489 White sucker Log W = -5.084 + 3.055 Log L 120 to 519 39 Smallmouth bass Log W = -5.522 + 3.249 Log L 100 to 519 252 Northern hogsucker LogW= -5.391 + 3.176 Log L 120 to 479 101 I

-Walleye Log W = -5.724 + 3.239 Log L 140 to 599 33 Channel catfish Log W = -6.175 + 3.421 Log L 200 to 839 94

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

WEEK RIVER PLANT RIVER CANAL AVG STARTING FLOW INTAKE TEMP TEMP 75-02 December 30 4,774 445.0 32.2 70.8 5,216 January 6 4,974 442.1 32.3 70.2 5,112 13 5,001 436.8 32.2 70.7 5,156 20 4,496 321.9 32.3 41.9 5,107 27 4,343 431.3 32.2 65.8 5,057 February 3 3,988 427.0 32.4 71.9 4,892 10 3,901 435.3 32.1 70.6 5,030 17 4,348 435.3 32.0 71.0 5,074 24 4,188 406.6 32.0 73.8 5,099 March 3 3,760 399.6 32.0 74.9 5,184 10 3,619 421.6 32.0 71.9 5,788 17 3,685 434.7 32.0 70.8 6,241 24 3,975 446.7 32.0 69.8 7,003 31 6,619 424.5 32.0 72.0 9,537 April 7 8,210 511.9 35.8 69.5 12,248 14 11,563 524.6 46.1 79.6 13,965 21 10,428 583.0 48.6 76.8 13,563 28 8,554 590.2 48.0 75.6 12,194 May 5 8,279 595.4 49.4 76.5 11,007 12 10,950 606.2 52.5 79.5 11,242 19 8,699 602.7 58.0 85.5 9,104 26 5,824 600.4 64.5 91.6 7,853 June 2 4,496 597.7 65.6 88.6 7,162

9. 3,605 601.6 69.8 85.5 7,194 16 3,547 602.1 71.0 84.0 7,733 23 7,759 623.0 76.2 87.6 7,700 30 9,360 635.3 80.4 91.0 7,439

July 7 12,694 632.6 76.5 88.5 7,144 14 14,318 638.1 76.8 88.8 6,629 21 9,933 632.4 75.9 88.0 5,787 28 8,168 626.5 76.7 90.4 4,872 August .4 8,008 623.1 73.2 - 88.0 4,394 11 6,351 620.7 73.2 87.3 4,116 18 6,502 615.4 70.2 85.3 4,044 25 6,641 615.8 73.2 88.1 4,195 September 1 7,398 618.9 72.2 87.7 4,297 8 6,916 618.8 72.4 86.8 4,462 15 5,413 607.8 67.0 84.3 4,412 22 4,471 596.0 58.6 86.5 4,640 29 4,275 587.9 55.9 85.8 5,021 October 6 6,993 579.2 51.3 81.2 5,391 13 7,301 517.0 47.0 80.4 5,692 20 6,810 520.0 40.4 71.6 6,028 27 6,427 520.7 38.2 71.1 5,812 November 3 5,971 511.6 36.9 70.6 5,736 10 5,714 529.6 36.5 69.2 5,563 17 5,418 523.1 34.7 70.2 5,273 24 4,459 499.0 32.8 68.5 4,944 December 1 4,036 446.6 32.2 73.2 4,698 8 4,345 422.4 32.3 75.5 4,657 15 4,588 428.2 32.3 73.4 .4,746 22 4,138 415.3 32.2 74.8 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 RIVER PLANT RIVER CANAL AVG STARTING FLOW INTAKE TEMP TEMP 75-03 December 29 4,265 428.9 32.3 -73.7 5,183

• January 5 3,928 448.0 32.3 71.4 5,072 12 3,575 445.8 32.2 71.9 5,102 19 3,083 429.4 32.3 73.4 5,037 26 2,866 428.1 32.3 73.0 4,957 February .2 2,682 418.7 32.9 75.3 4,816 9 2,810 416.0 32.4 75.7 4,953 16 2,687 464.9 32.2 69.9 4,992 23 3,015 430.6 32.4 73.4 4,996 March 2 2,913 427.4 32.6 74.5 5,106 9 2,771 422.3 32.7 74.8 5,684 16 3,531 452.4 32.9 71.6 6,147 23 4,612 474.0 35.2 71.8 6,920 30 4,178 526.7 36.8 70.4 9,252 April 6 3,820 521.6 41.2 74.8 11,957 13 5,001 557.1 48.4 79.2 13,656 20 10,166 490.1 47.7 71.8 13,446 27 7,503 22.3 .55.9 64.0 11,907 May 4 6,301 26.8 55.0 61.3 10,844 11 9,658 21.4 57.5 62.6 11,188 18 9,157 188.1 60.9 63.1 9,106 25 7,565 537.2 64.4 81.2 7,773 June 1 5,495 614.9 65.7 93.7 7,104 8 5,777 619.4 66.4 90.4 7,145 15 5,047 552.4 74.1 81.6 7,640 22 10,320 634.2 70.9 85.7 7,791 29 14,553 635.6 72.6 86.9 7,751

Il July 6 12,038 637.4 74.9 87.1 7,312 13 10,290 638.6 73.6 87.2 6,760 I' 20 7,220 631.2 74.8 87.6 5,837 27 5,120 626.0 *76.0 88.4 4,994 August 3 4,286 623.3 76.0 88.2 4,391 10 3,407 621.3 77.8 89.9 4,092 17 2,631 617.9 78.3 90.6 3,995 24 2,062 612.1 74.8 88.3 4,206 31 1,945 605.4 70.2 83.5 4,216 September 7 2,238 605.6 70.3 86.6 4,385 14 2,452 599.5 65.3 91.0 4,345 21 2,287 587.1 57.9 87.5 4,559 28 2,078 582.9 51.7 81.7 4,893 October 5 2,005 575.6 57.5 88.0 5,274 12 2,056 563.6 53.7 85.1 5,566 19 2,185 561.4 52.8 84.0 5,895 26 2,442 556.9 44.0 75.0 5,717 November 2 2,540 556.5 36.7 68.4 5,626 9 2,575 541.5 35.6 68.6 5,460 16 3,030 550.3 37.5 69.1 5,196 23 2,480 423.1 34.0 75.9 4,859 30 3,302 421.1 32.6 74.8 4,650 December 7 2,892 414.6 32.5 73.6 4,596 14 3,416 381.4 32.1 75.8 4,700 21 3,497 412.7 32.4 75.1 5,234 Mean 52 4,572 491.9 50.9 78.2 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 inthe 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 1994 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. IllustratedKey to the Minnows of Wisconsin.

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

Daniel, W.W. 1978. Applied NonparaametricStatistics. 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 Fishesof Missouri. Missouri Department of Conservation Publication. 343 pp.

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

0

B3 .EA TsLLNM COOLING TON-Eas DISCF4.RGZ CAITAL a 0.5 0MCW Lj ISLA2ID

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

-TLZ3R5AL - Sector 12 MONTL.SIMPI ?ARMI ?tmLV-Sector 2 Figure, 1. Seining Study Area. )

I I Figure 2

) 2002 Upstream Species Composition Shiner spp.

1% Sand shiner 66%

Bluntnose minnow .

6%

Moxostoma spp.

2%

Smallmoutfh bass 2%/

Bigmouth shiner 2%/

Hornhead chub Other 1% 2% Comrmon shiner I t 2002 Downstream Species Composition Backside darter 1%

Homybead chub 1%

Moxostoma spp.

Shorthead redhorse 1%

3%

. ,..S.

Other 3% ....

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%

Sand shiner Smallmouth bass 55%

6%

Other 3%.

Shiner spp.

3%

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

11%

Smallmouth bass 14%

Spotfin shiner i 45%

Shorthead redhorse 3%/

Bluntnose minnow 1%

Sand shiner Johnny darter 18% 2%

Other 4%

Common shiner 1%

)i

Figure 4 1977 to 2003 Upstream Species Composition Smallmouth bass Moxostoma spp. 2%/

5% 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% Spotff shiner 33%

Smallmouth bass 7%

8-/.w Blunthose minnow 14%

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 USrmalbnouth bass D Bkuoose nrbnwCJohnny 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 IIt Shiuhg SMMox n ESmafuth bass MBtmunmmrramow Cjohrny darter a ter I i

Figure 6 Species Abundance Trends White sucker 20000

+

18000 Upstream F? = 0.0311 Downstream Ff = 0.0176 16000 -

3 14000 12000 I EC,, I10000 i7L 8000

+

a 6000

+ 13 +r 0

4000 - a 0

03 2000 -

m+ +

Alla6k 3 + 3 + 1 al.a+

t; =2 u ' + ~ ' > ' ' g 'ts( L;1 l;5 81m; ,s >li fL.tQ z *0 0*

1980 2003 0 Upstream + Downstream Upstream - Downstream

Fijre 7 Species Abundance Trends Johnny darter 9000 8000 7000 6000 5000 I I

4000 3000 2000 1000 0

1980 2003 I 0 Upstream + Downstream Upstream Downstream

Figure 8 Species Abundance Trends Homyhead chub 2500 2000 1500 I . ,y 1000 500 0

1980 2003 l a - Upstream + Downstream Upstream Downstream.l

Fiyure 9 Species Abundance Trends Sand shiner 70000 60000 50000 40000 I

(j LL 30000 20000 10000 0

1980 2003 I Upstream + Downstream Upstream Downstream

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

1980 2003 .

I a Upstream + Downstream pUpstream --- .-- Downstream

Figure 11 Species Abundance Trends Bluntnose minnow 35000

+ Upstream R2 0.0083 2

Downstream R = 0.0001 30000

+

25000 03 20000 CE 15000 +

10000 ++ +

+ + °+ + o oE+

5000 +00+ 3 i+a 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 1980 2003 I a Upstream + Downstream Upstream . .- DownstreamI

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

1980 2003 9r Upstream + Downstream - Downstream] 2003Upstream

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

Ic SPECIES 1970 1973 1978 11977 1979 1§79 1990 1VIA I 1992 199 1994 I9NS 1999 I1997 1999 1999 10901 I9§ 1992 1991 1NA too' 1999 197 INA 1999 2000 2001 2002 2003 Yaars Northean Pike 5. Ic N . 5 Ic Is CISCO Central slonerdiler 3 Hormyhoed chub Ic 5 Nc o a N 5 5 Ic Ic 5 a 30 Creek chub It Ic. 7 Faftead mirinow Icx If 5 Ic 1Okwnnose minnw Ic 5 Ic Ic 5x 51 5 5 Ic 24 o Ic Ic A o Ic Ic o Ic Ic 30 Brassy minnow S o a Ic c

'A Ic Ic Ic 5 o 5 Ic 5A ax It X o Ic 5 le Ic1 Spoifin Shiner o It 51 oA a Ic Ic II Ic 5 30 Digmourts Shiner o Ic S Ic I 01 a1 o Ic 5 a s a c Ic 30 Send Shiner 5 Ic Ic Ic 5 5 I I Ic aX c Ic 5 30 nivet shiner Ic N a Ic a a o x Ic Ic Ic 5 aX a 3 Spoltel shiner Ic Ic If S o 5 Ic 5 Ic 5X x s s 29 Comrnon shiner 5 Ic x S 0 5X a s Ic 5 5 5 Ic I 30 Ic 51 5X Golden shiner Ic It S Mimic shiner o x 5 5 5 5

Ic 5 Ic 5 S 1 II Corp o Ic Ic 5

x 14 Longnose dISCO Ic Ic 5 Ic N 5 5X o 5 5 5 5 27 Blacknose dISCO Ic If a s 25 ox o Ic Ic N.redbelly dace Ic Ic 5 Ic 5 51 5 I Sliver redhorse o K 5 5 Ic* 2 9I 5

Shorthesd redhorse o a 5 Ic c 5 Ic c 5 Ic 29 White sukelr o o 5x Ic a Sx o Ic I 30 Blgmouthl Isuffalo Ic x 3 Northern hogsucker Ic 5 o

Ic 5 I 24 Channel catfish N s o Ic a Black bufhead Ic 5 5 S Yellow btllhead 5 5 Icx Trowlparots. 5 Ic a* Ic Ic I o N 0 5 c 5 If 5 21 Banded kdlfltih o s1 Ic I IBrook slickdebeck S

N I 5 Brook stverside x II II a a Ic N It II 20 Smallmouti beess 51 S Ic S IIc I I I Ic Ic 5 Ic c Ic Ic I 5 II 5 a Ic s s a 5 30 Lurgernwult base a 5 Ic N Ic a

Black crappie a Ic 5 s o 19 5 Ic c Ic S S o Ic 5 a While crappie Ic I N a1 Ic Rock bass Nc S 5 S Ic 1Ii S1 Bluegill N N a NIc t I Ic Ic Ic v 5 o Green Sunfish Ic a It 5 c I 5 29 Logperch Ic Ic I I cf Ic 5 Ic 5 Ic Ic S1 S o a Ic Ic Johnny darter Ic N Ic 5 5 Ic Ic xII Ic I I Ic 5 51 o a c Ic c Ic 5 30 Welleye 0 5x a S 5x Ic Ic 5 Ic S I 19 Yellow perch 5X a, o s S II Ic I

xc t Bfockklde darter Ic S c 5 A

o x o s a x s 23 Total I Species . 19 21 la 23 21 22 26 24 23 31 Totll~ocea 30 9 2 1 26 23 23 2124 2 2A 6 2 22 23 2931 32 23 22 22 29 30 28 29 26 27 29 29 31 44

Table 2. MontrLego Seining Study- Species Percent Compostdlon SPECIES 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 Northern pike .A<0.1 I~ O.1 0.6 (0.1 4.1 0.2 0.1 0.3 Ao.1 .0. It0o. 0.1 (o.1 (0.1 (0.1 CSCO 0.11 Central storweroler o0.1 0.1 (0.1 *0.1 Homybead cdwb 3.1 1.7 0.1 3.0 0.2 1.0 1.1 1.t 1.4 2.6 2.0 2.0 2.7 0.3 0.4 0.1 0.4 0.3 0.2 0.3 0.7 0.3 0.2 0.4 0o.1 0.2 0.1 0.6 1.1 0.2 0.9 Creekthub 0.3 0.1 .0.I '0.1 0o.I (0.1 0.1 '0.1 Fathead rnnow 0.9 0.6 0.2 0.4 0.1 0.4 0.1 0.3 0.1 1.0 0.1 0.4 0.1 0. I 0.1 0.8 0Q1 0.1 0.2 01 t.Q1 O.0. 0.3 o.t 0.2 Dtuntnose mInnow 12.7 16.2 23.4 18.1 40.3 7.3 5.3 6.3 12.6 9.4 12.5 166 21.5 14.6 16.8 14.2 19.2 25.8 7.0 5.4 2. 0.3 0.4 30 5.4 5.6 1.2 3.6 10.9 0.s 10.6 Brassy rmnnow 0.3 t0.1 0.1 0.1, .0.1 .0.1 .0.1 -0A1 o. 0.o s 0.2 o.1 .0s 0.1s 0.2 o. .*Qt Spolln shiner 21.1 23.5 23.4 t9.3 22.5 150 12.6 11.2 41.8 35.7 31.1 28.2 23.9 to9 42.3 47.6 27.3 12.9 9.5 6.4 11.4 8.8 45.3 23.9 24.1 17.8 14.5 17.2 21.4 2564 22.9 Blgmouth shiner 27.3 21.8 12.4 22.1 2t.6 42.4 5.1 3.0 34 2.5 2.4 5.8 4.1 4.4 3.9 4.4 6.0 10.3 11.2 4.4 2.3 6.5 0.4 4.2 3.1 13.8 1.5 1.0 t.6 0.6 7.5 Sand Shiner 18.4 2t.6 IS.3 5.6 0.1 13.0 8.9 36.6 10.7 20.9 21.8 35.0 20.7 48 7.4 16.3 340 45.3 41.0 47.5 18.5 28.5 6.1 39.9 24.2 63.8 15.3 70.0 49.9 36.6 26.5 River shiner 66 0.4 .. I 0.3 Spoltal shiner 1.0 0.8 0.2 0.2 08 2.4 0.1 0.7 04 0.3 0.1 02 1.0 0.2 0.9 0.4 0.1 0.5 0.4 0.1 04 0.1 0.6 Ol 0.1 0.3 .0.8 0.2 0.2 0.4 Cormon shiner 2.9 3.4 0.2 1.2 0.8 0.4 0.1 0.7 1.6 0.6 02 0.1 0.2 0.1 0.3 0.11 0.3 0.1 0.3 2.7 2.1 1.9 1.0 0.6 2.5 1.2 0.7 1.2 0.6 0.8 Golden shiner .0.1 4.11 .0.1 .o.1 .o. .o0t MtOO Shiner 0.1 0.1 0.1 0.1 (0.1 0.1 (0.1 to.I .0.1 .o.sI 4o 4l

.o .0.1 <o.tf Carp 0.5 0.1 0.4 .0.1 .0.1 0.1 05 0.1 40.1 0.1 0. *Q0.1I *0.1 0.1 0.0 Lononose dace 3.1 0.7 2.0 0.6 1.1 3.5 1.6 2.2 1A 2.7 02 0.2 3.0 0.2 0.2 0.3 0.3 0.1 0.2 0.3 0o 0.1 0.1 0.1 1.2 0.1 0.1 0.8 Blscknose dace 0.4 0.3 0.1 0.I 0.1 0.1 0.3 0.2 '0.1 0.1 0.7 to.1 0.1 <0.1 0.2 o0.1 0.3 0.4 0.9 0.1 83.2 0.1 10.4 0.2 0.3 0.2 0.7 5lverredhora. 1.1 0.8 0.1 1.0 0.4 0.1 0.2 0.1 0.1 3.A 0.5 0.1 1.1 (0.1 0.3 1.2 0.1 0.2 0.3 0.2 0.1 2.0 0.1 02 0.1 0.6 Shorthead redhofse 3.3 0.1 0.2 1.3 1.6 I.I 0.6 0.1 0.3 02 6.6 3.3 0.4 0.5 (0.1 06 2.1 1.4 1.7 1.0 2.1 0.2 6.4 0.2 0.4 2.1 1.4 White sucer 2.5 3.9 2.5 6.3 1.2 5.0 29.7 2.6 4.8 0.6 2.9 1.2 0.1 4.9 0.6 0.4 0.6 0.2 9.0 0.3 2.9 4.9 3.1 5.1 4.6 0.6 11.9 0.1 0.1 2.8 4.0 Bomnouthbrdlalo '0.1 Northern hoosuckor 0.3 2.3 0.9 1.0 1.0 0.5 0.3 1.2 02 0.3 0.1 .o.I 0.8 0.3 0.6 1.1 1.1 0Q7 0e2 .. 1 2.s 0e2 .0.11

<Ql e.5 0e6 Channel caltish 0o.I 0.0A <0.1 .0.1 *0.1I <0 I< 01I ~ t0.1

<0,1 (0.1

<0.t Btack brlihead 0.I (0.1 <0.1 (O.1 0.1 (0.I Yelow bullhead (0.1 I Trout-perch 0.4 0.1 0.7 0.1 (0.1 2.3 0.8 0.1 1.2 0.1 0.7 0.4 17 0.1 (0.1 (0.1 1.5 <0.1 (0.1 40.1 (0.1 0.4 Banded ilrllsh (0.1 I0.1 I Brook eslIcback .0.1 40.1 0.1 0.1 (0.1I 0.1 Brook aslertde 0.1 0.1 o0.1 0.2 <0.1 0.1 0. 1 0.1 0.1 0.1 0.lI 0.2 0.1 (0. 0o. 0.2 (0.1 0.2 (0.11 (0.1 g0.

Srnnsoulh bass 1.7 1.0 0.4 0.4 1.2 4.1 6.2 3.9 48 2.2 1.6 0.7 0.4 1.6 4.2 1.4 1.0 1.9 95 10.6 17.1 182 24.7 7.8 6.8 1.8 7.1 0.2 7.7 0.t 5.9 Largemouth bass 0.2 0.1 0.4 0.1 (0.1 .o.1 0.1 0.5 0.1 .O. 0.1 0.8 o.1 0.1 <o l 0.1 <o. o.1l o.l Black crapple 0.1 06 02 0.2 (0.I 0.1 0.2 0.4 0.1 0.4 0.4 0.1 .0.1 (0.1 0.1 0.1 .0.1 <0,1 0.1 0.1 O0t Whilecrappie (O.1 0.2 0.1 .0.1 0.1 .0.1 Rock bwss 0.1 0.2 *0.1 0.o1 (0.1 02 0.4 0.11 .0.1 0.1 .0.1 .0.8 Bregiltl <0.t1 o.1 <0nG 0.1 0.3 0.4 0.1 0.4 0.6 (0.I 0.5 0.2 .0.I 1.5 0.4 (o.1 0.1 .0.1 0.9 <0.1 1.9 0,2 0.2 (0.1 0.1 0.1 0.3

• Green sunftsh 0.o.

Log perch 0.2 0.3 3.9 0.1 3.9 1.4 0.1 1.6 2.4 0.1 02 1.7 0.9 0.2 0.8 o0.I 2.7 0.1 0.4 1.4 0.1 0.1 2.6 0.1 2.0 (0.1 0.2 4.7 1.2 Johnny dartof 5.0 2.6 1.3 6.2 1.3 1.4 89 3.4 2.9 0.9 5.0 4.5 103 6.0 2.1 0.7 2.4 1.0 2.7 4.9 1.6 0.9 1.8 0.4 0.9 0.7 0.8 0.5 0.3 1.7 2.7 Wageye 0.1 0.1 0.1 0.1 O. 0.1 0.1 0.1 0.2 0.2 1.0 0.4 t.t 0.2 O.t 0.4 ot1 02 0.1 ot0.

Yellow perch 0.1 0.1 .0.I 0.1 (0.1 <0.1 <0.1 0.1 0.2 (0.1 (o0.

Blacrslde darter 0o.1 03 1.4 0.1 08 0.9 0.6 0.4 0.3 0.1 0.9 0.2 0.3 0.8 0.1 0.2 0.4 0.4 1.e (0.1 0.3 0.6 0.4 Shiner tpp. 0.3 1.6 02 I.e 0.3 4.4 4.2 1.6 7.9 1.9 12.6 17.2 9.7 6.6 1.4 0.3 0.6 11.0 2.4 2.2 1.7 08 1.1 0.1 4.5 4.5 0.6 1.7 3.6 MoXoaloSnI app. 0.3 0.6 86.9 05 5.I 56 19.0 3a 14.4 3.3 0.6 0.3 6.3 6.3 2.9 0.2 0.1 2.7 6.7 31.3 16.1 7.1 8.5 15.3 14.2 0.1 2.5 9.1 6.7 Centrarcid spp 0.1 0.5 o0.1 (0.8 0.3 (0.1

1 4 Table 3a. 2002 Monticello Seining Study - Fishlhectare. Weighted Average, and percent of Catch for the Upstream Sector Weighted 6/10 6/25 7/09 7/29 8108 8/20 8t29 9110 Average Percent Homyhead chub 70 47 1123 861 302 795 428 1.4 Fathead rninnow 116 70 1292 80 0.3 Bluntnose minnow 2816 1001 14530 1148 38 197 186 2914 1682 5.6 Brassy minnow 46 23 265 44 0.2 Spotfin shiner 3095 512 50158 3157 6851 1378 4678 4769 5002 16.8 Bigmouth shiner 140 349 1076 574 262 689 1117 1656 689 2.3 Sand shiner 6656 2932 58231 46283 5316 26735 27555 25501 19472 65.4 Spottail shiner 72 431 56 0.2 Common shiner 186 323 143 861 271 140 33 216 0.7 Longnose dace 70 116 32 0.1 Blacknose dace 140 628 132 0.4 Shorthead redhorse 74 209 48 0.2 White sucker 23 430 72 23 28 <0.1 Northern hogsucker 23 66 12 <0.1 Trout perch 108 72 8 <0.1 Brook sitverside 38 4 <0.1 Smallmouth bass 93 1614 789 1048 1255 1513 132 723 2.4 Black crappie 47 8 <0.1 Logperch 108 72 172 186 68 0.2 Johnny darter 46 93 108 72 38 186 72 0.2 Walleye 108 72 148 32 0.1 Blackside darter 215 72 172 199 64 0.2 Shiner spp. 1490 288 1.0 Moxostoma spp. 838 2583 589 2.0 Total 14242 10007 128301 52598 15575 33952 36095 36761 29777 99.7 Table 4a. 2002 Monticello Seining Study - Fishthectare, Weighted Average, and Percent of Catch for the Downstream Sector Weighted 6/10 6/25 7/09 7/29 8/08 8/20 8/25 9/10 Average Percent Northern pike 39 4 <0.1 Homyhead chub 306 76 143 235 22 92 0.5 Fathead minnow 194 25 265 48 0.3 Bluntnose minnow 5416 1013 29011 7535 1957 544 420 298 3524 19.7 Brassy minnow 167 . 25 72 32 0.2 Spotfin shiner 5722 8661 5630 6243 1722 3671 6999 1987 5219 29.1 Bigmouth shiner 56 51 331 23 44 33 52 0.3 Sand shiner 11500 2330 7154 7319 548 2900 2981 2848 4322 24.1 Spottail shiner 143 45 22 66 28 0.2 Common shiner 1444 380 744 99 357 2.0 Blacknose dace 203 32 0.2 Silver redhorse 68 33 80 0.4 Shorthead redhorse

• 215 470 430 22 133 156 0.9 White sucker 199 72 39 23 22 28 0.2 Smal mouth bass 6500 5698 3378 1722 3483 544 1104 961 2971 16.6 Largemouth bass 72 4 <0.1 Black crappie 28 152 78 36 0.2 Bluegill 28 117 91 88 33. 52 0.3 Logperch 33 4 <0.1 Johnny darter 305 76 397 39 33 88 0.5 Walleye 51 133 359 157 52 0.3 Blackside darter 431 133 143 117 96 0.5 Shiner spp. 101 72 33 24 0.1 Moxostoma spp. 3111 1089 625 3.5 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 Percent I.

6v11 7111 7121 8f01 8/08 8/26 9/04 Average Homyhead chub 45 19 12 0.1 Bluntnose minnow 123 56 22 19 207 181 73 0.6 Brassy minnow 369 34 15 0.1 Spotfin shiner 770 4551 833 1227 1665 1171 816 12111 9.8 Bigmouth shiner 181 639 151 19 34 it 54 1.2 Sand shiner 6549 20911 11500 102Z5 2124 5373 3263 67(62 54.8 Spottail shiner 123 22 38 23 19 0.2 Common shiner 249 56 19 68 5 0.5 Mimic shiner 22 4 <0.1 Carp 23 4 <0.1 Blacknose dace 23 28 8 0.1 Silver redhorse 23 4 <0.1 Shorthead redhorse 246 28 64 76 654 566 2C18 1.7 White sucker

• 23 6643 667 581 306 448 68 30 4.3 Northern hogsucker 23 139 129 69 113 73 0.6 Trout perch 246 8 0.1 Smiallmouth bass 964 694 1141 804 1860 249 742 6.0 BtuegiU 19 69 12 0.1 Logperch 1599 1278 1227 191 3272 861 996 8.1 Johnny darter 1230 389 19 207 159 146 1.2 Walleye 22 4 <0.1 Blackside darter 1107 139 22 69 65 0.5 Shiner spp. 413 1790 350 2.8 Moxostoma spp. 5098 865 7.0 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 6/11 7/11 7/21 8/01 8/08 8/26 9/04 Average Percent Northern pike 23 4 <0.1 Homyhead chub 17 25 45 69 29 0.2 Creek chub 123 45 52 22 0.2 Fathead minnow 34 246 14 0.1 Biuntnose minnow 120 2460 25 23 34 57 64 128 1.1 Spotfin shiner 9868 7380 2988 221 1929 918 542 4948 44.0 Sand shiner 2411 9225 6635 1065 310 86 1988 17.7 Spottail shiner 34 23 34 115 33 0.3 Common shiner 258 113 172 109 1.0 Golden shiner 29 4 <0.1 Mimic shiner 17 4 <0.1 Carp 69 25 18 0.2 Blacknose dace 172 36 0.3 Silver redhorse 52 25 14 0.1 Shorthead redhorse 2337 101 482 446 292 2.6 White sucker 103 615 354 91 0.8 Bigmouth buffalo 123 4 <0.1 Northern hogsucker 23 103 29 64 36 0.3 Channel catfish 246 7 0.1 4

Banded killitish 17 <0.1 Smallmouth bass 276 11686 1975 1.269 2428 430 1339 1616 14.4 Largemouth bass 246 32 11 0.1 Bluegill 17 23 7 0.1 Logperch 362 492 76 23 172 142 1.3 Johnny darter 103 5904 354 52 259 2.3 22 Walleye 152 0.2 Yeflow perch 17 4 <0.1 Blackside darter 34 2091 76 45 88 0.8 Shiner spp. 478 55 0.5 Moxostoma spp. 5958 1262 11.2 Total 19939 43174 12811 4941 5837 1664 2965 11251 99.9

Tabe . MontlceibSein 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 Northtmpik. 3 .0 304 3 3 9 4 27 4 1S 14.0 Ckco e - 0.2 Centranslomw.r 3 4 4 0.4 Homayhesd chub 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 Creakchub a 3 04 Fa.ad midrnrow 24 105 s6 S 30 18 502 8 8 3 9 e1 e 11 22 7 3 eo o6.3 Bltlnnoe minnow 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 Brall rninnow a s 9 4 25 II 11 44 IS 4.e Spottn shiner 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 Send shiner 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 shin.r viner 3090 63 4 16.9 Spolal shinbr 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 Common ehinr 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 Mimc Shinfr 1C3 5 s a 9 4 4 19 Golden shinr Carp 27 4 3 6 142 3 3 4 10 4 7.7 Longnov.dace 370 247 940 410 377 s7 476 Os 62 1360 13 6s 8e a 26 9 14 48 99 4 ie 41 229 40 32 173.9 Blacknose de 12 a 13 86 17 32 209 9 3 23 26 0o 114 7 ee6 34 t972 70 132 a 130.5 Sle redlhorse 203 177 9 1te 47 10 28 t9 10 622 10s II 9 3 23 9 4 II 25 22 94 130 26 4 71.0 Shorthead redhora. 202 12 126 29 as 22 31 127 14 2363 721 7 25 9 67 147 4 1952 so 389 8e 591 73 48 208 209.5 Whilesuckr 2401 240 e84 leaf 455 697 135 189 515 2009 120 109 194 83 1021 36 110 s09 322 621 707 250 1524 26 26 530 M63.s BlgmoArh buffalo 7 0.3 Northem hog*ucker 71 79 26 42 10 538 38 33 9 103 1 0 e 9s 46 1a 15 14 304 7 12 73 59.7 Charnecatfish 9 4 7 0.7 Black buthead 0.1 Yelowbulh..ad Troulperch 18 194 9 4 424 6 428 6 152 166 1s 4 4 664 3 4 a a 06.5 Bandedileth Brook sacldebeck 3 0.1 Brook liverslde 3 14 82 3 4 14 61 4 4 5.9 Smutmoultbmas 101 too 9 205 St 868 124 214 122 34 73 234 127 1I7 229 s58 18 383 1273 1501 370 595 210 200 6 723 742 337.3 tafrganneulnhbess 9 to 9 I 9 a II 2.8 Blackcra.ppte 30 4 6 9 62 24 108 a 13.3 Whitecrespt 17 5 30 6 2.1 Flockbess 4 0.1 okuag1 4 224 e 9o 24 490 4 15 3 11 12 33.1 Orson esrefih Legperch 449 6 402 142 28 185 387 S9o 44 406 1ss 47 206 220 18 So 31 is 14 690 48 338 11 SS 99s 15.3 Johnny dart 1954 246 t17 1372 828 421 180 738 2099 2697 1952 St7 199 920 437 206 t97 124 77 114 I6 102 313 10o 18O 72 14e 595.0 Weasys 9 10 8 15 31 54 3 99 37 15 97 44 34 se 37 32 4 21.0 yalboc patch 6 4 4 0.5 Bteckskie ddrler 6 42 to1 20 876 128 49 39 e8 26 35 11 11 29 as 180 4 04 as 42.1 Shho. app 337 10 61 59. 517 402 33 2600 990 3201 6243 1274 1355 6o0 Ila 126 1229 331 251 201 36 412 27 673 165 s599 350 898.4 Moercltors aPp 12 Igo 642 2874 899 1252 350 219 2152 629 732 9 30 239 206 19es t9t0 887 220 3012 2836 288 ass 770.0 Contraeid Opp 9 46 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 Folspeiets 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 92 207 144 171 180 98 478 184 94 20 113 219 a 25 28 8 a8 7 83 7 Si 29 215 92 29 128.0 Crookchui. 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 14 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 10 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 Blororoutii&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 RIiverMrser 1747 2 64.8 Spouselshlnr II 10 94 298 164 20 so 932 es 238 19 37 62 27 Bs 89 9 9 II 27 22 23 88l 4 28 33 81.9 Commrronshtonlr 287 82 27 II 99 422 03 a a 14 117 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! 97 27 90 Ise 8s so 13 47 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 51.5 BandedMMfll 4 0.9 Brookslcklotback 4 12 9 4 1.,

Oraoksrerolds 6 20 8 27 4 22 9 27 3 a 8 24 0 4 922 AI ¶9A 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 II 21.5 Black cripple 84 9 22 8 17 71 12 920 19 7 12 33 4 4 4 22 38 98.2 Wl4Ic"Apple 12 70 a 3 5.4 Rlockbass 72 4 a A90 28 132 3 a 97 4 10.4 Bkflixg 93 90 9 40 89A 90 Be 82 12 24 t97 74 10 202 208 a 25 5 103 4 434 128 24 52 7 07.7 GreenawrO.! a 0.2 Lagerchr 648 10 . 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 11 23 9 I98 42 109 43 73 4 44 97 St 22 17.7 Yellow perchr I0 9 24 8 8 4 19 18a 4 2.9 13fockside darter 216 21 41 244 78 87 71 20 144 42 IS 900 4 20 78 993 229 4 96 88 08.9 Shkwrospy 22 99 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 21 29 28 22 19 22 27 23 26 to 2S' 26 25 24 50 41

Table 7a. 2002 Monticello Seining Study - Species Composition

) of the Upstream and Downstream Sectors Upstream Percent Downstream Percent Sand shiner 65.4 Spoffin shiner .29.1 Spotfin shiner 16.8 Sand shiner 24.1 Bluntnose minnow 5.6 Bluntnose minnow .19.7 Smallmouth bass 2.4 Smallmouth bass 16.6 Bigmouth shiner 2.3 Moxostoma spp. 3.5 Moxostoma spp. 2.0 Common shiner 2.0 Hornyhead chub 1.4 Shorthead redhorse 0.9 Shiner spp. 1.0 Blackside darter 0.5 Common shiner 0.7 Hornyhead chub 0.5 Blacknose dace 0.4 Johnny darter 0.5 Fathead minnow .. .0.3 Silver redhorse - 0.4 Johnny darter - 0.2 Bigmouth shiner 0.3 Log perch 0.2 Walleye 0.3 Blackside darter 0.2 Bluegill 0.3 Spottail shiner 0.2 Fathead minnow 0.3 Shorthead redhorse 0.2 Black crappie .0.2 Brassy minnow 0.1 Brassy minnow 0.2 Longnose dace 0.1 Blacknose dace 0.2 Walleye 0.1 White sucker 0.2 White sucker 0.1 Spottail shiner 0.2 Northern hogsucker <0.1 Shiner spp. 0.1 Black crappie <0.1 Northern pike <0.1 Trout perch <0.1 Log perch <0.1 Brook silverside <0.1 Largemouth bass <0.1

)

F Table 7b. 2003 Monticello Seining Study - Species Composition of the Upstream and Downstream Sectors Upstream Percent Downstream Percent Sand shiner 54.8 Spotfin shiner 44.0 Spotfin shiner 9.8 Sand shiner 17.7 Log perch - 8.1 Smallmouth bass 14.4 Moxostoma spp. 7.0 Moxostoma spp. 11.2 Smallmouth bass 6.0 Shorthead redhorse 2.6 White sucker 4.3 Johnny darter 2.3 Shiner spp. 2.8 Log perch 1.3 Shorthead redhorse 1.7 Bluntnose minnow 1.1 Bigmouth shiner 1.2 Common shiner 1.0 Johnny darter 1.2 White sucker 0.8 Bluntnose minnow 0.6 Blackside darter 0.8 Northern hogsucker 0.6 Shiner spp. 0.5 Common shiner 0.5 Northern hogsucker 0.3 Blackside darter 0.5 Blacknose dace 0.3 Spottail shiner 0.2 Spottail shiner 0.3 Brassy minnow 0.1 Hornyhead chub 0.3 Hornyhead chub 0.1 Walleye 0.2 Bluegill 0.1 Creek chub 0.2 Blacknose dace 0.1 Carp 0.2 Trout perch 0.1 Fathead minnow 0.1 Silver redhorse <0.1 Silver redhorse 0.1 Mimic shiner <0.1 Largemouth bass 0.1 Walleye <0.1 Bluegill 0.1 Carp <0.1 Channel catfish 0.1 Northern pike <0.1 Yellow perch <0.1 Mimic shiner <0.1 Bigmouth buffalo <0.1 Golden shiner <0.1 Banded killifish <0.1 I

II

I I

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

Species Rank Year Bluntnose Spotlin Bigmouth Sand' Shiner While Moxostoma Johnny Smallmouth minnow shiner shiner shiner species sucker species darter bass Logperch 1977 2 4 5 1978 3 1 1979 3 4 5 4 1990 1 1 5 3 1981 4 2 5 1982 2 3 5 4 1983 4 2 3 5 1984 3 2 4 5 1985 3 4 5 1986 2 3 4 5 1987 3 2 5 1988 2 4 3 5 1989 3 5 2 4 1990 3 4 1 5 1991 2, 3 1 5 1992 5 2 I 4 3 I I 1993 2 4 3 1994 2 5 1 3 1995 5 3 2 1996 4 5 3 2 1997 1 5 3 4 1998 5 1 3 4 1999 4 3 1 2000 1 4 3 2001 4 5 1 3 2002 3 I 5 4 2003 1 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 36 25 30 1994 110 296 205 1995 509 190 366 1996 322 71 192 1997 621 118 385 1998 797 269 535 1999 258 100 171 2000 1524 1076 1324 2001 26 4 15 2002 28 28 28 2003 530 91 310 Average 643 308 434 Upstream Downstream Average Year Fish/ha Fish/ha Fish/ha Moxostoma spp.

1977 405 494 450 1978 201 125 163 1979 103 179 141 1980 1124 515 820 1981 2950 814 1792-1982 693 127 379 1983 1302 1014 1219 1984 358 615 417 1985 219 125 187 1986 0 73 43 1987 2153 964 1546 1988 629 1154 869 1989 732 174 442 1990 9 86 48 1991 36 33 35 1992 239 407 320 1993 206 949 588 1994 1168 3269 2241 1995 1910 346 1208 1996 897 39 448 1997 226 1121 646 1998 3012 542 1787 1999 0 0 -o 2000 2836 25 1581 2001 0 30 15 2002 589 625 607 2003 865 1262 1069 Average 847 560 706

• 1976 data from NUS 316B Study.

APPENDIX A.

)

Fish Species List Based on Seining and Electrofishing at Monticello Method

• Amiidae Bowfin Amia calva E Salmonidae Cisco Coregonus artedi B Esocidae Northern pike Esox lucius B Muskellunge Esox masquinongy E I

Cyprinidae Central stoneroller Campostoma anomalum S Hornyhead chub Nocomis biguttus S Creek chub Semotilus atromaculatus S Fathead minnow Pimephalespromelas S Bluntnose minnow Pimephalesnotatus S Brassy minnow Hybognathus hankinsoni S Spoffin shiner Notropis spilopterus S Bigmouth shiner Notropis dorsalis S Sand shiner Notropis stramineus S River shiner Notropis blennius. S Spottail shiner Notropis hudsonius S Common shiner Notropis comutus S Golden shiner Notropis volucellus S Mimic shiner Notemigonus crysoleucas S Carp Cyprinus carpio B Longnose dace Rhinichthys cataractac S Blacknose dace Rhinichthys atratulus S No. redbelly dace Puoxinus eos S Catostomidae Silver redhorse Moxostoma anisurum B.

Shorthead redhorse Moxostoma acrolepidotum B Greater redhorse Moxostoma valenciennesi E White sucker Catostomus commersoni B Bigmouth buffalo Ictiobus cyprinellus B Northern hogsucker. Hypentelium nigricans B

. I I E-.2 Ictaluridae Ictalurus punctatus B Channel catfish Pylodictis olivaris E Flathead catfish Ictalurus melas B Black bullhead Ictalurus natalis B Yellow bullhead Ictalurus nebulosus E Brown bullhead Percopsidae Trout-perch Percopsis omiscomaycus S Gadidae Burbot Lota Iota E Fundulidae Banded killifish Fundulus diaphanus S Antherinidae Brook silverside Labidesthes sicculus S Gasterosteidae Brook stickleback Culaea inconstans B B

Centrarchidae B Smallmouth bass Micropterus dolomieui B Largemouth bass Micropterus salmoides B Black crappie Pomoxis nigromaculatus B White crappie Pomoxis annularis E Rockbass Ambloplites rupestris B Bluegill Lepomis macrochirus Pumpkinseed Lepomis gibbosus Green sunfish Lepomis cyanellus B B

Percidae S Yellow perch Perca flavescens S Walleye Stizostedion vitreum S Johnny darter Etheostoma nigrum Blackside darter Percina maculata Logperch Percina caprodes

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