fishery similar to that made by Hile 

 (1949) for Lake Huron. Detailed 

 records of fishing pressure in 1929- 

 1949 proved that overfishing could 

 not have been a significant factor in 

 decline of lake trout in State of Mich- 

 igan waters of Lake Michigan and 

 contributed to conclusion that sea- 

 lamprey depredations offered the only 

 reasonable explanation. 



1951 . Decline of the trout fishery in Lake 

 Michigan. The Fisherman, Vol. 

 19, No. 1, pp. 5 and 10. 

 Summary of longer paper published 

 by same authors under similar title 

 in same year. 



1951 . Status of the lake trout fishery in 



Lake Superior. Trans. Am. Fish. 

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

 Review similar to that in other 1951 

 article by same authors for Lake 

 Michigan. No evidence existed of in- 

 jury to lake trout in Lake Superior by 

 sea lamprey through 1949. Stocks 

 were nevertheless in precarious con- 

 dition as result of long-term trends 

 which had led to excessively high fish- 

 ing pressure and abnormally low 

 availability in State of Michigan waters 

 (and probably in other regions of lake) 

 by that year. 



1951 . Status of the lake trout fishery in 

 Lake Superior. The Fisherman, 

 Vol. 19, No. 3, pp. 5 and 13. 

 Summary of longer paper published 

 by same authors under same title in 

 same year. 



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. 

 Analysis of production records, 1891- 

 1938, and of annual fluctuations in 

 abundance and fishing intensity, 1929- 

 1938, and life -history study with data 

 on body -scale relationship, age and 

 size, growth, length -weight relation- 

 ship, and sex ratio . 



1942. 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, and Lett., 

 Vol. 28 (1941), pp. 241-266. 

 Investigation of such phases of the 

 life history as age and size, growth 

 in length and weight, length -weight 

 relationship, sex ratio, and maturity, 

 and a comparison indicating growth 

 rates to be similar 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 Chancey Juday 



1941. Bathymetric distribution of fish in 



lakes of the northeastern highlands, 



Wisconsin. Trans. Wis. Acad. 



Sci., Arts, and Lett., Vol. 33, 



pp. 147-187. 

 Comparison of bathymetric 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 tempera- 

 ture 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. Bull., Fish and Wild- 

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

 Comparison of production levels and 

 trends in 1885, 1891-1908, and 1929- 

 194 9 and description of relations of 

 fluctuations in production, abundance, 

 and fishing 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- 

 1949 as result of overfishing; the 

 relatively cheap lake herring alone 

 more than accounted for the decrease 

 whereas the average annual take of more 

 prized varieties increased (for example, 

 annual yield of the valuable whitefish 

 in 1929-1949 was 4-1/2 times that in 

 1891-1908). Concludes with discussion 



23 



