GREAT LAKES COREGONIDS 



455 



In the lift of the 2^-inch nets made on August 16, 1920, 8 miles south of Green 

 Island in GreenjBay in 16 fathoms (record 53), and the lift of 2^-inch nets made 

 on November 15, 1920, 20 miles ESE. of Milwaukee, Wis., in 28 to 35 fathoms on 

 the spawning grounds of zenithicus (record 18), no hoyi were gilled, but a number 

 of small individuals were caught by the jaw. Chub lifts made with 2^2-inch nets on 

 August 18, 1920, 4 miles west of Boyer Bluff in 18 to 24 fathoms took 50 per cent 

 bloaters (record 1); on August 24, 1920, 10 miles E. by N. of Algoma, Wis., in 35 to 50 

 fathoms, 68 per cent (record 7); on September 25, 1920, 18 miles E. y 2 S. of Port 

 Washington, Wis., in 65 to 48 fathoms, 53 per cent (record 11); 17 on September 3, 

 1920, 22 miles NW. by N. Yi N. of Michigan City, Ind., in 30 to 40 fathoms, 42 per cent 

 (record 20); on October 11, 1920, 20 miles N. by W. % W. in 30 to 40 fathoms, 34 per 

 cent (record 21); on November 19, 1920, 17 miles NNW. in 28 to 32 fathoms, 50 per 

 cent (record 24); on March 2, 1921, 21 miles NNW. in 30 fathoms, 81 per cent 

 (record 28); and on March 4, 1921, 15 miles NW. by N. y 2 N. in 28 fathoms, 96 per 

 cent (record 29). 



Bloaters comprised 15 per cent or less of the catches of 2J^-inch nets made on 

 August 19, 1920, 20 miles E. Yi N. of Rock Island, Wis., in 71 to 90 fathoms (record 

 5); on September 23, 1920, 27 miles ESE. of Milwaukee, in 60 fathoms (record 16); 

 on November 8, 1920, 18 miles NNW. of Michigan City, Ind., in 30 to 38 fathoms 

 (record 22), and on November 19, 1920, 10 miles NNW. in 18 fathoms (record 25) 

 and 17H miles NW. by N. % N. in 32 fathoms (record 26). Lifts 18, 22, 25, and 26 

 were composed largely or almost exclusively of spawning zenithicus, and the absence 

 of hoyi is to be expected therefore. Lift 24, which was made out of Michigan City, 

 Ind., at about the same time, and which shows 50 per cent of hoyi, may have been 

 made outside the spawning area of those fish. 



These records thus show that the lifts made by the 2^2-inch gill nets between the 

 depths of 18 and 50 fathoms, excepting those made on the spawning grounds of zenith- 

 icus in November, have percentages of bloaters between 34 and 96. The one lift from 

 16 fathoms in Green Bay and from 28 to 35 fathoms off Milwaukee gilled no fish of 

 this species, and the lifts from depths of 60 fathoms or more took only occasional 

 specimens, except that from off Point Betsie on October 4, 1920, which had 22 per 

 cent hoyi. Considering the fact that nets of 2%-inch mesh were used, the percentage 

 is high and indicates that bloaters possibly were numerous on these grounds at that 

 time. 



Data from, the pound nets. — In two localities the occurrence in the pound nets, 

 among the herring, of numbers of fish, which from the descriptions given are probably 

 bloaters, has been reported. At Port Washington, Wis., D. H. Smith says that in 

 early July a good run of such fish enters his pounds. The fish sometimes remain 

 ashore all during the month. F. C. Kimball reports 1,200 pounds of these fish on 

 June 23, 1919, from three pound nets off Michigan City, Ind., and a lighter catch 

 for a few days thereafter. They occur in the nets in varying numbers every year 

 at this season, according to Mr. Kimball. Marketable bloaters were taken by me 

 on September 27, 1920, in Mr. Smith's pound nets at Port Washington in 5 fathoms 



" The nets in this case were set along the bank that slopes up to a large reef, and most of the hoyi taken were on the shoal end 

 of the gang. 



94995—29 11 



