and north shores . The total number of units 

 lifted in Illinois and in Wisconsin districts W-3 

 through W-6 was 17, 402 as compared with 

 8, 551 in Michigan districts M-2 through M-8. 

 The grand total of 25, 953 units represents the 

 lifting of more than 49, 000 miles of chub gill nets . 



The outlook for the Lake Michigan chub 

 fishery is not bright. Three factors make for 

 a progressive deterioration of stocks of salable 

 fish: an increase in the intensity of the fishery 

 against the larger chubs, brought about by the 

 diversion of fishing pressure formerly directed 

 against lake trout; the end of predation by trout 

 and the consequent enormous increase in the 

 abundance of the commercially valueless bloater; 

 the selective destruction of the larger chubs by 

 the still -plentiful sea lampreys. Of the three, 

 destruction of larger chubs by lampreys seems 

 likely in the long run to prove most damaging. 



Literature cited 



Applegate, Vernon C . 



1950. Natural history of the sea lamprey, 

 Petromyzon marinus , in Michigan. 

 U.S. Fish and Wildlife Serv., 

 Spec. Sci. Rep.: Fish. No. 55, 

 237 pp. 



1951. The sea lamprey in the Great 

 Lakes. Sci. Monthly, Vol. 72, 

 pp. 275-281. 



Hile, Ralph 

 1937. 



United States members of the Inter- 

 national Board of Inquiry for the 

 Great Lakes Fisheries. Internat. 

 Bd. Inq. Great Lakes Fish. --Rep. 

 andSuppl., pp. 25-213. 



The increase in the abundance of 

 yellow pike -perch, Stizostedion 

 vitreum (Mitchill), in Lakes Huron 

 and Michigan, in relation to the 

 artificial propagation of the species . 

 Trans. Am. Fish. Soc., Vol. 66 

 (1936), pp. 143-159. 



1949. Trends in the lake trout fishery of 

 Lake Huron through 1946 . Trans . 

 Am. Fish. Soc, Vol. 76 (1946), 

 pp. 121-147. 



Hile, Ralph, and Hilary J. Deason 



1947. Distribution, abundance, and spawn- 

 ing season and grounds of the kiyi, 

 Leucichthys kiyi Koelz, in Lake 

 Michigan. Trans. Am. Fish. Soc., 

 Vol. 74(1944), pp. 143-165. 



Hile, Ralph, Paul H. Eschmeyer, and George F. 

 Lunger 

 1951a. Decline of the lake trout fishery 

 in Lake Michigan. Fish. Bull., 

 U. S. Fish and Wildlife Serv., 

 Vol. 52, pp. 77-95. 



Applegate, Vernon C., and James W. Moffett 



1955. The sea lamprey. Sci. American, 

 Vol. 192, No. 4, pp. 36-41. 



1951b. Status of the lake trout fishery in 

 Lake Superior. Trans. Am. Fish. 

 Soc, Vol. 80 (1950), pp. 278-312. 



Deason, Hi lary J . 



1932. Scientific investigations of chub- 

 net fishing in Lake Michigan. 

 The Fisherman, Vol. 1, No. 4, 

 pp. 3-4 and 11-12. 



Deason, Hilary J., and Ralph Hile 



1947. Age and growth of the kiyi, 



Leucichthys kiyi Koelz, in Lake 

 Michigan. Trans. Am. Fish. Soc. 

 Vol. 74 (1944), pp. 88-142. 



Gallagher, Hubert R., and John Van Oosten 

 1943. Supplemental report of the 



Hile, Ralph, and Frank W. Jobes 



1941 . Age, growth, and production of the 

 yellow perch, Perca flavescens 

 (Mitchill), of Saginaw Bay . Trans. 

 Am. Fish. Soc, Vol. 70 (1940) 

 pp. 102-122. 



Hile, Ralph, George F. Lunger, and Howard J. 

 Buettner 



1953 . Fluctuations in the fisheries of 

 State of Michigan waters of Green 

 Bay. Fish. Bull., U.S. Fish and 

 Wildlife Serv., Vol. 54, pp. 1-34. 



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