Comparison of plantings of yellow 

 pikeperch (walleyes) with later produc- 

 tion and abundance (on catch-per-net 

 basis) to estimate value of artificial 

 propagation. No evidence of benefits 

 was found. 



HILE, RALPH. 



1941. Age and growth of the rock bass, 

 Ambloplites rupestris (Rafinesque), in 

 Nebish Lake, Wisconsin. Trans. Wis. 

 Acad. Sci, Arts Lett. 33:189-337. 



Study of fluctuations in growth and 

 strength of year classes of rock bass in 

 a 95-acre landlocked Lake. Growth was 

 correlated positively with temperatures 

 in June and September (initial and 

 terminal months of the growing season) 

 and with precipitation in June. The 

 strength of year classes was correlated 

 positively with temperature and precipi- 

 tation in May, June, and July. Other 

 topics treated include: criteria for 

 testing validity of annulus as a year- 

 mark; sex and age differences in 

 progress of season's growth; growth 

 compensation as a real and as an 

 "apparent" phenomenon; relation of 

 growth rate to size and age at nnaturity; 

 annual and seasonal fluctuations in the 

 length-weight relation; and sex ratio. 



fflLE, RALPH. 



1942. Growth of the rock bass, Annbloplites 

 rupestris (Rafinesque), in five lakes of 

 northeastern Wisconsin. Trans. Amer. 

 Fish. Soc. 71:131-143. 



Comparison of growth and length- 

 weight relation in different populations. 

 Growth curves of rock bass from lakes 

 with mediunn-hard to hard water were 

 more distinctly sigmoid and had larger 

 increments in later years of life than 

 curves for stock from soft-water lakes. 

 Order of the stocks with respect to 

 relative heaviness followed the order of 

 the lakes as to hardness of water. 



HILE, RALPH, 



1943. Mathematical relationship between 

 the length and the age of the rock bass, 

 Ambloplites rupestris (Rafinesque), 

 Pap. Mich. Acad. Sci. Arts Lett. 28:331- 

 341. 



Derivation of equation on the as sump- 

 tion that annual percentage growth in 

 length decreases at a constant per- 

 centage rate, and application to growth 

 of two stocks of rock bass. Equation, 

 L = K (CB + 1) (CB^ + 1) (CB^ + 1)... 

 (CbI + 1), where L = length, t = age in 

 years, and K, C, and B = constants. 



fitted growth of one stock through 9 

 years of life; in another the equation 

 fitted over 6 years but yielded values 

 that were too high for the seventh, 

 eighth, and ninth years. 



HILE, RALPH. 



1948. Standardization of methods of ex- 

 pressing lengths and weights of fish. 

 Trans. Amer. Fish. Soc. 75:157-164. 



Recommendation for uniform use of 

 total length (tip of head, mouth closed, 

 to tip of tail, lobes compressed) and for 

 English units of weight and measure- 

 n-ient (with decimal fractions) in all but 

 highly technical papers. 



HILE, RALPH. 



1949. Trends in the lake trout fishery of 

 Lake Huron through 1946. Trans. Amer. 

 Fish. Soc. 76:121-147. 



Review of available statistics on pro- 

 duction, 1879-1946, and detailed treat- 

 ment of annual fluctuations in production, 

 abundance, and fishing intensity in local 

 districts of the U.S. waters, 1929-46, 

 with special reference to the decline that 

 followed the invasion and spread of the 

 sea lamprey. 



HILE, RALPH. 



1950a. A nomograph for the connputation of 

 the growth of fish fronn scale nneasure- 

 ments. Trans. Amer. Fish. Soc. 

 78:156-162. 



Description of a device usable for 

 rapid nonnographic computation of 

 growth from scale measurements re- 

 gardless of the nature of the body-scale 

 relation. 



HILE, RALPH. 



1950b. Green Bay walleyes. A report on the 

 scientific investigation of the marked 

 increase in abundance of walleyes in 

 Green Bay. The Fisherman (Grand 

 Haven, Mich.) 18(3):5-6. 



Popular discussion pointing out: that 

 the abnormally high abundance could be 

 traced almost entirely to a single year 

 class (1943); that a return to a much 

 lower level could be considered inevi- 

 table; and that restrictive regulations 

 intended to perpetuate the abnormal 

 abundance would prove disappointing and 

 would place unnecessary handicaps on 

 the fishing industry. 



HILE, RALPH. 



1952a. Changes in the lake trout fishery in 

 the three upper lakes. The Fishernnan 

 (Grand Haven, Mich.) 20(6):5, 8. 



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