26 



COMMERCIAL FISHERIES REVIEW 



Vol. 28, No. 7 



FISHING OPERATIONS: Exploratory 

 drags were made at various locations around 

 the lake where heavy alewife concentrations 

 were observed on the echo-sounder or to ver- 

 ify the absence of alewives at certain depths 

 or particular locations. Two drags (off Sau- 

 gatuck) were made to capture chub for tech- 

 nological studies. A total of 32 drags was 

 completed, 10 during Phase I and 22 during 

 Phase II. Drags were of various lengths with 

 on-bottom time periods ranging from 1 min- 

 ute to 30 minutes. Drags made in areas hold- 

 ing large concentrations of alewives were 

 shortened to less than the standard 30 -minute 

 period to avoid making large catches. Major 

 gear damage resulted from sets in some 

 areas--in the piers at Manitowoc, at 8 fath- 

 oms off Two Rivers and at 6 fathoms off Port 

 Washington. 



FISHING RESULTS PHASE I (March 29- 

 April 7): During Phase I there was no evi- 

 dence of the beginning of the spawning run 

 anywhere in the southern half of the lake. 



Alewives were completely lacking in all har- 

 bors visited and in shallow waters. The best 

 landings and echo-sounder recordings of ale- 

 wives were made in 45-50 fathoms from 

 Saugatuck south along the east shore and a- 

 long the west shore south of Port Washington. 

 Alewives were not. positively located off Mani- 

 towoc. Severe weather prevented a thorough 

 survey along the east shore between Little 

 Sable Point and Saugatuck. The best landing 

 was 1,500 pounds in a 30-minute drag at 44 

 fathoms off Benton Harbor. 



FISHING RESULTS PHASE II (April 19- 

 28): From just north of Benton Harbor a- 

 round the southern portion of the lake to Wau- 

 kegan, dense scattered schools were located 

 along the beaches in 6-9 fathoms and heavy 

 concentrations were found in all harbors. 

 Commercial trawlers fishing just in front of 

 the Benton Harbor piers were landing up to 

 9,500 pounds in 10-minute drags. The Kaho 

 made large catches at all stations and partic- 

 ularly in the harbor of Gary, Ind., where an 



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PHASE 



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Track lines of echo -sounding survey by the R/V Kaho during Exploratory Cruise No. 31. 

 of alewives. 



Shaded areas indicate bottom concentrations 



