Letter Sequence Other |
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MONTHYEARML20148L0151978-03-31031 March 1978 Special Rept 35,The Effects of Intermittent Chlorination on 10 Species of Warmwater Fish Project stage: Other ML20148L0291978-04-30030 April 1978 Fish Population Studies from Lake Erie Near Davis-Besse Nuclear Power Station During 1977, ETS Section 3.1.2.a.3, Fisheries Population Studies Project stage: Other ML20148L0561978-09-30030 September 1978 Section 3.1.2.a.1 of First Annual Environ Oper Rept for Subj Facil,Phytoplankton & Zooplankton Densities from Lake Erie Near the Davis-Besse Nuc Pwr Station During 1977 Project stage: Other ML20148L0451978-09-30030 September 1978 Section 3.1.2.a.2 of First Annual Environ Oper Rept for Subj Facil,Benthic Macroinvertebrate Populations in Lake Erie Near the Daivs-Besse Nuc Pwr Station During 1977 Project stage: Other ML20148L0411978-09-30030 September 1978 Ichthyoplankton Studies from Lake Erie Near Davis-Besse Nuclear Power Station During 1977 Project stage: Other ML20062D4911978-11-16016 November 1978 Toed Has Begun Fish Impingement Study to Investigate Number & Species of Fish Impinged on Traveling Screens at Facil. Phase I of Study Will Determine If Fish Impinged Are of Significant Number.Ltr from J Reutter,Osu,Encl Project stage: Other 1978-03-31
[Table View] |
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Category:ENVIRONMENTAL MONITORING REPORTS(&RADIOLOGICAL)-PERIODIC
MONTHYEARML20206D2551998-12-31031 December 1998 Annual Radiological Environ Operating Rept for Davis-Besse Nuclear Power Station for 980101-981231 ML20205K8291998-12-31031 December 1998 Annual Exposure Rept for Davis-Besse Nuclear Power Station. with ML20206D2651998-12-31031 December 1998 Radiological Environ Monitoring Program (REMP) for Davis-Besse Nuclear Power Station for 980101-981231 ML20236N4281997-12-31031 December 1997 Corrected Replacement Pages x,88 Through 90 & 108 Through 109 of Davis-Besse Nuclear Power Station 1997 Annual Radiological Environ Operating Rept, Including Radiological Effluent Release Rept ML20217M5381997-12-31031 December 1997 Annual Radiological Environ Operating Rept, W/Radiological Effluent Release Rept ML20199G2991997-10-31031 October 1997 Oct 1997 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20198P4361997-09-30030 September 1997 Sept 1997 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20211E4571997-08-31031 August 1997 Telecommunicated Wastewater Rept for Aug 1997 ML20217N3381997-07-31031 July 1997 Jul 1997 Telecommunicated Hardcopy Wastewater Rept ML20149H1781997-06-30030 June 1997 June 1997 Telecommunicated Hardcopy Wastewater Rept ML20141F2851997-05-31031 May 1997 May 1997 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20138A9611997-03-31031 March 1997 Mar 1997 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station ML20137C3801997-02-28028 February 1997 Feb 1997 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20135C3171997-01-31031 January 1997 Jan 1997 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 ML20136G0691996-12-31031 December 1996 1996 Annual Exposure Rept for Davis-Besse Nuclear Power Station ML20140D9411996-12-31031 December 1996 Annual Radiological Environ Operating Rept for Davis-Besse Nuclear Power Station for 960101-1231 ML20133P5251996-12-31031 December 1996 Dec 1996 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 ML20132F1891996-11-30030 November 1996 Nov 1996 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20134P0041996-10-31031 October 1996 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 for Oct 1996 ML20129C2591996-09-30030 September 1996 Sept 1996 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20129F4781996-08-31031 August 1996 Aug 1996 Wastewater Rept for Davis-Besse Nuclear Power Station ML20129G8541996-07-31031 July 1996 Jul 1996 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20115F4071996-06-30030 June 1996 Wastewater Discharge Rept for Davis-Besse Nuclear Power Station for June 1996 ML20112J4741996-05-31031 May 1996 Wastewater Rept for May 1996 for Davis-Besse Nuclear Power Station,Unit 1 ML20112B9231996-04-30030 April 1996 Wastewater Rept for Apr 1996 for Dbnps,Unit 1 ML20107L1081996-03-31031 March 1996 Mar 1996 Wastewater Rept for Davis-Besse Nuclear Power Station ML20101B8281996-02-29029 February 1996 Feb 1996 Wastewater Rept ML20100G2251996-01-31031 January 1996 Wastewater Rept for DBNPS Unit 1 for Jan 1996 ML20107C3211995-12-31031 December 1995 1995 Radiological Environ Monitoring Program for Davis- Besse Nuclear Power Station, Final Monthly Progress Rept ML20107C2861995-12-31031 December 1995 1995 Annual Radiological Environ Operating Rept for Davis- Besse Nuclear Power Station ML20108C6131995-12-31031 December 1995 Replacement Pages 128-137 of Davis-Besse Nuclear Power Station 1995 Annual Radiological Environ Operating Rept ML20095E9431995-11-30030 November 1995 Nov 1995 Wastewater Rept for Davis Besse Nuclear Power Station Unit 1 ML20094J1791995-10-31031 October 1995 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 for Oct 1995 ML20093H4001995-09-30030 September 1995 Wastewater Rept for Sept 1995 for Davis-Besse Nuclear Power Station,Unit 1 ML20098A3111995-08-31031 August 1995 Aug 1995 Wastewater Rept for Davis-Besse Nuclear Power Station ML20087G5701995-07-31031 July 1995 Wastewater Rept for Jul 1995 for Davis-Besse Nuclear Power Station,Unit 1 ML20086H2521995-06-30030 June 1995 Wastewater Rept for June 1995 for Davis-Besse Nuclear Power Station ML20085G3691995-05-31031 May 1995 Wastewater Rept for May 1995 for Davis-Besse Nuclear Power Plant ML20080H6321995-01-31031 January 1995 Wastewater Rept for Jan 1995 for Davis-Besse Nuclear Power Station,Unit 1 ML20077R5761994-12-31031 December 1994 Wastewater Rept for Dec 1994 for Davis-Besse Nuclear Power Station,Unit 1 ML20082V4051994-12-31031 December 1994 Annual Radiological Environ Operating Rept ML20078Q5201994-11-30030 November 1994 Wastewater Rept for Nov 1994 for Dbnps,Unit 1 ML20078D9961994-09-30030 September 1994 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 for Sept 1994 ML20073B8471994-08-31031 August 1994 Aug 1994 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20072C4131994-07-31031 July 1994 Wastewater Rept for Jul 1994 for Davis-Besse Nuclear Power Station,Unit 1 ML20071H5591994-06-30030 June 1994 Wastewater Rept for June 1994 for Davis-Besse Nuclear Power Station Unit 1 ML20072S8321994-06-30030 June 1994 Radioactive Effluent Release Rept Jul 1993 - June 1994 ML20069N1711994-05-31031 May 1994 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 for May 1994 ML20029E5001994-04-30030 April 1994 Apr 1994 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1. W/940511 Ltr ML20065K6081994-03-31031 March 1994 Wastewater Rept for Mar 1994 1998-12-31
[Table view] Category:TEXT-ENVIRONMENTAL REPORTS
MONTHYEARML20205K8291998-12-31031 December 1998 Annual Exposure Rept for Davis-Besse Nuclear Power Station. with ML20206D2551998-12-31031 December 1998 Annual Radiological Environ Operating Rept for Davis-Besse Nuclear Power Station for 980101-981231 ML20206D2651998-12-31031 December 1998 Radiological Environ Monitoring Program (REMP) for Davis-Besse Nuclear Power Station for 980101-981231 ML20217M5381997-12-31031 December 1997 Annual Radiological Environ Operating Rept, W/Radiological Effluent Release Rept ML20236N4281997-12-31031 December 1997 Corrected Replacement Pages x,88 Through 90 & 108 Through 109 of Davis-Besse Nuclear Power Station 1997 Annual Radiological Environ Operating Rept, Including Radiological Effluent Release Rept ML20199G2991997-10-31031 October 1997 Oct 1997 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20198P4361997-09-30030 September 1997 Sept 1997 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20211E4571997-08-31031 August 1997 Telecommunicated Wastewater Rept for Aug 1997 ML20217N3381997-07-31031 July 1997 Jul 1997 Telecommunicated Hardcopy Wastewater Rept ML20149H1781997-06-30030 June 1997 June 1997 Telecommunicated Hardcopy Wastewater Rept ML20141F2851997-05-31031 May 1997 May 1997 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20138A9611997-03-31031 March 1997 Mar 1997 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station ML20137C3801997-02-28028 February 1997 Feb 1997 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20135C3171997-01-31031 January 1997 Jan 1997 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 ML20140D9411996-12-31031 December 1996 Annual Radiological Environ Operating Rept for Davis-Besse Nuclear Power Station for 960101-1231 ML20133P5251996-12-31031 December 1996 Dec 1996 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 ML20136G0691996-12-31031 December 1996 1996 Annual Exposure Rept for Davis-Besse Nuclear Power Station ML20132F1891996-11-30030 November 1996 Nov 1996 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20134P0041996-10-31031 October 1996 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 for Oct 1996 ML20129C2591996-09-30030 September 1996 Sept 1996 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20129F4781996-08-31031 August 1996 Aug 1996 Wastewater Rept for Davis-Besse Nuclear Power Station ML20129G8541996-07-31031 July 1996 Jul 1996 Telecommunicated Hardcopy Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20115F4071996-06-30030 June 1996 Wastewater Discharge Rept for Davis-Besse Nuclear Power Station for June 1996 ML20112J4741996-05-31031 May 1996 Wastewater Rept for May 1996 for Davis-Besse Nuclear Power Station,Unit 1 ML20112B9231996-04-30030 April 1996 Wastewater Rept for Apr 1996 for Dbnps,Unit 1 ML20117H6721996-04-25025 April 1996 NPDES Noncompliance Notification:On 960419 Discovered That Hydrazine Concentration in North Settling Basin Exceeded. Internal Outfall 602 & External Outfall 001 Closely Monitored for Hydrazine ML20107L1081996-03-31031 March 1996 Mar 1996 Wastewater Rept for Davis-Besse Nuclear Power Station ML20101B8281996-02-29029 February 1996 Feb 1996 Wastewater Rept ML20100G2251996-01-31031 January 1996 Wastewater Rept for DBNPS Unit 1 for Jan 1996 ML20108C6131995-12-31031 December 1995 Replacement Pages 128-137 of Davis-Besse Nuclear Power Station 1995 Annual Radiological Environ Operating Rept ML20107C3211995-12-31031 December 1995 1995 Radiological Environ Monitoring Program for Davis- Besse Nuclear Power Station, Final Monthly Progress Rept ML20107C2861995-12-31031 December 1995 1995 Annual Radiological Environ Operating Rept for Davis- Besse Nuclear Power Station ML20095E9431995-11-30030 November 1995 Nov 1995 Wastewater Rept for Davis Besse Nuclear Power Station Unit 1 ML20094J1791995-10-31031 October 1995 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 for Oct 1995 ML20093H4001995-09-30030 September 1995 Wastewater Rept for Sept 1995 for Davis-Besse Nuclear Power Station,Unit 1 ML20098A3111995-08-31031 August 1995 Aug 1995 Wastewater Rept for Davis-Besse Nuclear Power Station ML20087G5701995-07-31031 July 1995 Wastewater Rept for Jul 1995 for Davis-Besse Nuclear Power Station,Unit 1 ML20086H2521995-06-30030 June 1995 Wastewater Rept for June 1995 for Davis-Besse Nuclear Power Station ML20085G3691995-05-31031 May 1995 Wastewater Rept for May 1995 for Davis-Besse Nuclear Power Plant ML20080H6321995-01-31031 January 1995 Wastewater Rept for Jan 1995 for Davis-Besse Nuclear Power Station,Unit 1 ML20077R5761994-12-31031 December 1994 Wastewater Rept for Dec 1994 for Davis-Besse Nuclear Power Station,Unit 1 ML20082V4051994-12-31031 December 1994 Annual Radiological Environ Operating Rept ML20078Q5201994-11-30030 November 1994 Wastewater Rept for Nov 1994 for Dbnps,Unit 1 ML20078D9961994-09-30030 September 1994 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 for Sept 1994 ML20073B8471994-08-31031 August 1994 Aug 1994 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1 ML20072C4131994-07-31031 July 1994 Wastewater Rept for Jul 1994 for Davis-Besse Nuclear Power Station,Unit 1 ML20071H5591994-06-30030 June 1994 Wastewater Rept for June 1994 for Davis-Besse Nuclear Power Station Unit 1 ML20072S8321994-06-30030 June 1994 Radioactive Effluent Release Rept Jul 1993 - June 1994 ML20069N1711994-05-31031 May 1994 Wastewater Rept for Davis-Besse Nuclear Power Station Unit 1 for May 1994 ML20029E5001994-04-30030 April 1994 Apr 1994 Wastewater Rept for Davis-Besse Nuclear Power Station,Unit 1. W/940511 Ltr 1998-12-31
[Table view] |
Text
-
. J CLEAR TECHNICAL REPORT NO. 88 1
ICHTHYOPLANKTON STUDIES 4 FROM LAKE ERIE NEAR THE l .
i DAVIS-BESSE NUCLEAR POWER STATION i DURING 1977 Environmental Technical Specifications Sec. 3.1. 2. a. 4 Ichthyoplankton Prepared by Jeffrey M. Reutter Prepared for Toledo Edison Company
- Toledo , Ohio THE OHIO STATE UNIVERSITY CENTER FOR LAKE ERIE AREA RESEARCH COLUMBUS, OHIO September 1978 1811200 6
3.1.2.a.4 Ichthyoplankton Procedures Duplicate ichthyoplankton (fish eggs and larvae) samples were collected from the surf ace and bottom of Stations 3 (control station), 8 (intake),13 (plume area), 29 (control station), and Toussaint Reef (Figures 1 and 2) using a.0.75 meter diameter heavy-duty oceanographic plankton net (No. 00, 0.75 mm mesh) equipped with a calibrtted General Oceanics flow meter. Each sample consisted of a 5-minute tow at 3 to 4-knots /hr with this net. Samples . were collected on 13 occasions (approximately 10-day intervals) between 20 April 1977 and 2 September 1977. Sampling was terminated after 2 September as only ,
one, sample on 22 August and none of the samples from 2 September contained ichthyoplankters. It should be noted that U.S. EPA (Grosse Ile office) termi-nates their Western Basin sampling on 15 July each year. Samples were pre-served in 5% formalin and returned to the laboratory for sorting and analysis.
All specimens were identified and enumerated using the works of Fish (1932),
Norden(1961aandb)andNelsonfndCole(1975). Results were reported as the number of individuals per 100 m of water calculated from the. volume filtered (flow meter) and the number of individuals within the sample.
Results Specimens collected during the 1977 field season represented 13 taxa, 12 to the species level and one listed as unidentified (Table 1). No eggs were collected in any of the samples. Gizzard shad, yellow perch, walleye and emerald shiners were the dominant species representing 55.9 percent, 25.5 percent, 11.1 percent, and 3.0 percent, respectively, of the total population.
No other species represented as much as 1.5% of the total. Gizzard shad occurred from 21 May through 12 August and peaked on 2 June at 198.3 indi-viduals per 100 m3 of water. Yellowperchwerepresentonghefirstsampling date, 20 April, but at the low concentration of p.1/100 m . Perch remained through 13 June and peaked on.21 May at 60.2/100 m . Wallegeoccurredfrom29 April through 2 June and peaked on 21 May at 49.9/100 m .
fmeraldshiners occurred frog 13 June through 22 August and peaked at 6.9/100 m on 27 July and at 6.2/100 m on 25 June. '
! Station 3 exhibited the greatest larval density, 57.4/100 m3, while, in the vicinity of the plant site, the other control station (29) exhibited the lowest density 15.8/100 (Table 2). Overall, Toussaint Reef exibited the lowest density, 11.6/100 m . At 4 of the 5 stations, larvae were more abundant ajthebottom(Table 3). However,thesurfacedensityatgtation 3 (80.8/100 i m ) was so much greater than the bottom density (19.2/100 m ) that the overall I mean from all stations showed the surface to have a greater density than the bottom.
All raw data were keypanched and stored at the offices of The Ohio State l University's Center for Lake Erie Area Research in Columbus, Ohio. A voucher collection of all samples is also maintained at these offices.
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- DAVIS-BESSE NUCLEAR POWER STATION, UNIT 1 AQUATIC SAMPLING STATIONS 1
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B ATH Y METRIC MAP -
DEPTH CONTOURS IN FEET BELOW LOW WATER OATU A
+ LE Asi cEPTH OVER Rf EF C CONTOUR INTERVAL 6 FEET k FEET
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e io. usa s's so sopoo MILES o vi s s .s < s s s ss '% ,P 83*'p5' 83 00' FIGURE 2. REEFS NEAR LOCUST POINT.
4 TABLE 1 MEAN-ICHTHYOPLANKTON CONCENTRATION *-
AT LOCUST POINT, LAKE ERIE - 19i7 1 '
)
DATE April Apell May June June June July July July July Aug. Aug. Sept. MIAN 20 29 21 2- 13 25 5 13 20 27 12 22 2
$PECl[5 Carp 0.0 0.1 ' O.1 2.6 0.0 0.3 0. 5 ' 0.0 0.0 0.0 0.0 0.0 0.0 0.28 Emerald Shiner 0.0 0.0 0.0 0.0 0.7 6.2 0.0 0.1 0.0 6.9 0.4 0.2 0.0 ' 1.12 freshwater Ocum 0.0 0.0 0.0. 3.3 0.1 1.0 0.3 1.7 0.2 0.0 0.0 0.0 0.0 0.51 Girrard Shad 0.0 0.0 1.1 198.3 38.0 15.8 1.1 13.4 ' O.7 0.0 0.4 0.0 0.0 20.68 Logoerch 0arter 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.3 0.0' O.0 0.04 Relabow Smelt 0.0 0.0 0.0 - 0.5 0.0 0,0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.04 Seeger 0.0 6.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0,0 0.0 0.0 0.52 Spottall Shiner 0.0 0.0 2.1 0.2 0.0 0.1 0.6 0.0 0.0 0.1 0.0 0.0 0.0 0.24 untdentifed 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.02 Walleye 0.0 3.5 49.9 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.12 White Bass 0.0 0.0 0.0 0.2 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.02 White Sucker 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.01 Yellow Perch 0.1 43.4 60.2 19.1 0.0 0.0 0.0 0.0 0.0 0.0 - 0.0 0.0 0.0 8 9.45 TOTAL 0.1 53.9 113.4 224.6 39.0 23.5 2.5 15.2 0.9 1,0 , 1.1 0.2 0.0 37.0 l
1 1
1 i
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- ' LData presented as number of larvae per 100 m of water and computed
-from 2 surface and 2 bottom tows at each of 4 sampling stations .,
.(3,-8,13,29) at Locust Point.
8
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.i TABLE P i ICHTHYOPLANKTON. CONCENTRATIONS
- AT SAMPLING STATIONS t AT LOCUST POINT, LAKE ERIE - 1977 l
TATIONS 3 8 13 29 MEAN** Toussaint l Reef (
, , DATE _
April 20 0.3 0.0-l April 29 10.1 55.7 67.8 82.2 53.9 37.0 li a
May 21 230.4 4.9 169.7 48.4 113.4 14.1 'I 52.1 *** *** 224.2 ***
June 2 396.6 j June 13 52.8' 79.1 17.3 7.0 39.0 59.2 ]
19.9 30.1 23.5 ***
June 25 19.3 24.6 July 5 0.0 4.1 5.6 0.0 2.4 0.0 July 13 25.7 5.4 18.8 10.8 15.2 0.6 l July 20 0.7 0.7 0.9 1.0 0.8 0.7 July 27 '
8.6 9.4 2.9 7.2 7.0 4.3 August 12 0.8 0.0 1.0 2.3 1.0 0.0 August 22 0.6 0.0 0.0 0.0 0.1 0.0 Sep't ember 2 0.0 0.0 0.0 0.0 0.0 0.0 l t
MEAN 57.4 19.7 25.3 15.8 37.0 11.6 l
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- Mean number per 100 3m of water computed from 2 surface and 2 bottom tows at each station. !
- Does not include results from Toussaint Reef.
-*** Poor weathu conditions precluded sampling at this station.
l-
TABLE 3 a
I ",iTHY0 PLANKTON ' CONCENTRATIONS . AT THE SURFACE AND BOTTOM 0F SAMPLING STATIONS.AT. LOCUST POINT, LAKE ERIE - 1977 d
0 ATE DEPTH STATION STATION STATION STATION MEAN Toussaint 3 8 13 29 Reef:
20 April S' O.6 b 0.0 0.0 0.2 b B 0.0 b 0.0 -0.0 0.0 b 29 April S- 7.o 34.3 46.7 32.0 30.1 26.1 B- 12.2 78.9 88.6 134.7 78.6- 47.7 21 May- S 230.4 9.9 149.3 51.6 110.4~ 0.0 B' -c 0.0: 193.0 42.9 78.6 32.2 2 June S 731.9 57.6 b b 394.6 b. l B- 61.4 46.5' b b 54.0 b 13 June S 1.5 , 21.8. 19.3 7.3 12.5 72.3 B 112.6 132.2 15.8 6.5 66.8 47.1 25 June S 6.9 5.3 18.7 16.9 12.0 b B 31.4 46.8 21.0 43.2 35.6 b 5 July. S 0.0 8.5 4.4 0.0 3.2 0.0 B 0.0 0.0 6.9 0.0 1.7 0.0 13 July S 51.8 7.6 28.7 8.7 24.2 1.2 B 10.2 3.5 8.4 14.7 9.2 0.0 20 July S 0.0 1.6 0.0 0.0 0.4 0.8 8 1.5- 0.0 1.7 1.7 1.2 0.7 27 July S 16.6 .10.8 5.0 13.7 ,
11.5 8.1 B 0.8 8.4 0,7 0.0 2.5 0.0 12 August S 1.5 0.0 1.0 3.0 1.4 0.0 %
B 0.0 0.0 - 1.0 1.5 0.6 0.0 22 August S 1.7 0.0 0.0 0.0 0.4' O.0 B 0.0 0.0 0.0 0.0 0.0 0.0 2 Septer.ber S 0.0 0.0 0,0 0.0 0.0 0.0 B 0.0 0.0 0.0 0.0 0.0 0.0 MEAN S 80.8 .13.1 22.8 11.1 46,2 10.9 B 19.2 26.4 28.1 20.4 25.3 12.8 1 a Number'per 100 m3'of water.
Poor weather conditions precluded sampling these stations.
'[ Equipment malfunction.
S= Surface B= Bottom'
_ _ - ~ _ - . . _ _ . _ , , _ . - . _ . . . . . , . , _ - . _ . . _ . . _ _ . _ . _ . . _ . . _ . _ . _ - - _ _ . _ _ . , _ _ _ . _ . _ _ . _ _
e
_y, Analysis Ichthyoplankton populations have shown tremendous variations since 1974.
Emerald shiners constituted 81 percent of the 1974 larvae,1 percent of the 1975 larvae, 60 percent of the 1976 larvae, and 3 percent of the 1977 larvae.
Yellow perch constituted 5 percent of the 1974 larvae, 70 percent of the 1975 larvae, 4 percent of the 1976 larvae, and 26 percent of the 1977 larvae.
Gizzard shad appear to have increased significantly reaching 34 percent of the 1976 larvae and 56 percent of the 1977 larvae. It is felt that the above described variability is largely due to the fact that we are sampling schooling specimens. Consequently, when the net is drawn through a school the density appears quite high.
This is the first year that walleye have constituted a significant portion of the catch. However, adult populations throughout the Western Basin are increasing greatly and, consequently, greater larvae populations are to be expected (Scholl, 1978).
In 1976, control stations (3 and 29) were established on either side of the intake (8)/ discharge (13) complex to determine if unusually large fish larvae populations were occurring due to possible spawning in the rip-rap material around these structures. This does not appear to be occurring as larvae densities in 1977, as in 1976, at Stations 8 and 13 were normally within the range set by the control stations. Furthermore, due to the great varia-bility observed, density differences between stations were not significant at the 0.05 ievel. This indicates that populations occurring in the vicinity of the intake and discharge complex were not unusual .for the shore of Lake Erie near Locust Point.
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LITERATURE' CITED i
Fish., M.P. 1932. Contributions to the early life histories.of sixty-two species of fishes from Lake Erie and its tributary waters. Bull. U.S.
Bur. Fish. 47:293-398.
Nelson, D.D. and R. A. Cole. 1975. The distribution and abundance of
~ larval fishes along the western . shore of ' Lake Erie ' at Monroe, Michigan. Michigan State Univ., East Lansing, Michigan. Institute of Water Research Tech. Rept. No. 32.4. 66 pp.
Norden, C.R. 1961a. A' key to larval fishes from Lake Erie. University of Southwestern Louisiana, Lafayette. Mimeo. Rept. 4 pp.
. Norden, C.R. 1961b. The identification of lar val perch, 'Perca I
flavescens, and walleye, Stizostedion v_._ vitreum. Copeia 61:282-288.
i Scholl, R.L. 1978. Status of Ohio's Lake Erie Fisheries: January 1, 1978. Ohio Dept. of Nat. Res. Div..of Wildlife. 20 pp.
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