of the Great Lakes. Trans. Amer. Fish. 

 Soc. 63:292-305. 



Account of tentative procedures for 

 compilation and analysis of commercial 

 fishery statistics. Includes a definition 

 of "effective fishing effort" for use in 

 fisheries based on a variety of species. 



HILE, RALPH, PAUL H. ESCHMEYER, and 

 GEORGE F. LUNGER. 

 1951a. Decline of the lake trout fishery in 

 Lake Michigan. Fish Wildl. Serv., Fish. 

 Bull. 52:77-95. 



Statistical study of the lake trout 

 fishery similar to that made by Hile 

 (1949) for Lake Huron. Detailed records 

 of fishing pressure in 1929-49 proved 

 that overfishing could not have been a 

 significant factor in decline of lake trout 

 in State of Michigan waters of Lake 

 Michigan and contributed to conclusion 

 that sea lamprey depredations offered 

 the only reasonable explanation. 



HILE, RALPH, PAUL H. ESCHMEYER, and 

 GEORGE F. LUNGER. 

 1951b. Decline of the trout fishery in Lake 

 Michigan. The Fisherman (Grand Haven, 

 Mich.) 19(I):5, 10. 



Summary of longer paper published 

 by same authors under similar title in 

 same year. 



HILE, RALPH, PAUL H. ESCHMEYER, and 

 GEORGE F. LUNGER. 

 1951c. Status of the lake trout fishery in 

 Lake Superior. Trans, Amer. Fish. Soc. 

 80:278-312. 



Review similar to that in other 1951 

 article by same authors for Lake Mich- 

 igan. No evidence existed of injury to 

 lake trout in Lake Superior by sea 

 lannprey through 1949. Stocks were 

 nevertheless in precarious condition 

 as result of long-term trends which had 

 led to excessively higher fishing pres- 

 sures and abnormally low availability 

 in State of Michigan waters (and probably 

 in other regions of Lake) by that year. 



HILE, RALPH, PAUL H. ESCHMEYER, and 

 GEORGE F. LUNGER. 

 1951d. Status of the lake trout fishery in 

 Lake Superior. The Fisherman (Grand 

 Haven, Mich.) 19(3):5, 13. 



Summary of longer paper published 

 by same authors under same title in 

 same year. 



HILE, RALPH, and FRANK W. JOBES. 



1941a. Age and growth of the yellow perch, 

 Perca flavescens (Mitchill), in the 

 Wisconsin waters of Green Bay and 

 northern Lake Michigan. Pap. Mich. 

 Acad. Sci. Arts Lett. 27:241-266. 



Investigation of such phases of the 

 life history as age and size, growth in 

 length and weight, length-weight re- 

 lation, sex ratio, and maturity, and a 

 comparison indicating growth rates to be 

 sinnilar in southern Green Bay and 

 northwestern Lake Michigan proper, but 

 much slower in both areas than in 

 Saginaw Bay and Lake Erie. 



HILE, RALPH, and FRANK W. JOBES. 



1941b. Age, growth, and production of the 

 yellow perch, Perca flavescens 

 (Mitchill), of Saginaw Bay. Trans. Amer, 

 Fish. Soc, 70:102-122, 



Analysis of production records, 

 1891-1938, and of annual fluctuations 

 in abiindance and fishing intensity, 

 1929-38, and life-history study with data 

 on body-scale relation, age and size, 

 growth, length-weight relation, and sex 

 ratio. 



HILE, RALPH, and CHANCEY JUDAY. 



1941. Bathymetric distribution of fish in 

 lakes of the northeastern highlands, 

 Wisconsin. Trans. Wis. Acad. Sci. Arts 

 Lett. 33:147-187. 



Comparison of bathynnetric distribu- 

 tion of fish in four lakes, revealing a 

 wide variation from one water to another 

 and, except for the cisco, a lack of 

 clear-cut dependence of that variation 

 on such factors as temperature and 

 concentrations of dissolved oxygen and 

 free carbon dioxide. 



HILE, RALPH, GEORGE F. LUNGER, and 

 HOWARD J. BUETTNER. 

 1953. Fluctuations in the fisheries of State 

 of Michigan waters of Green Bay. Fish 

 Wildl. Serv,, Fish, Bull, 54:1-34, 



Comparison of production levels and 

 trends in 1885, 1891-1908, and 1929-49, 

 and description of relations of fluctua- 

 tions in production, abundance, and fish- 

 ing intensity in last period. Questions 

 soundness of interpreting decline in 

 mean annual take of all species from 7 

 million pounds in 1891-1908 to 3-1/2 

 million pounds in 1929-49 as result of 

 overfishing; the relatively cheap lake 

 herring alone more than accounted for 

 the decrease while the average annual 

 take of more prized varieties increased 



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