(for example, annual yield of the valuable 

 whitefish in 1929-49 was 4-1/2 times 

 that in 1891-1908). Concludes with dis- 

 cussion of the problem of regulation. 



HILE, RALPH, vide: HILARY J. DEASON; 

 LOUIS A. KRUMHOLZ; STANFORD H. SMITH; 

 JOHN VAN OOSTEN. 



HOOPER, FRANK, vide: ALFRED M. BEETON, 



HOWELL, JOHN H., EVERETT L. KING, 



ALLEN J. SMITH, and LEE H. HANSON. 



1964. Synergism of 5,2'-dichloro-4'-nitro- 



phenol in a selective lamprey larvicide. 



Great Lakes Fish. Comm., Tech. Rep. 



8:1-21. 



A mixture of 98 percent TFM and 2 

 percent Bayluscide has a strongly 

 synergistic effect which reduces the 

 amount and cost of chennicals in treat- 

 ments of streams for the selective de- 

 struction of the sea lamprey. Synergistic 

 effects are reduced at lesser per- 

 centages of Bayluscide, and selectivity 

 is impaired at percentages above 3. 



HOWELL, JOHN H., and WILLMAN M. 



MARQUETTE. 



1962, Use of mobile bioassay equipment in 



the chemical control of sea lamprey. 



U.S. Fish Wildl. Serv., Spec, Sci. Rep. 



Fish. 418, iv + 9 p. 



Describes bioassay facilities installed 

 in an 18-foot house-trailer shell. This 

 mobile laboratory permits rapid, ac- 

 curate streamside tests that must pre- 

 cede each application of a selective 

 toxicant for destruction of larval sea 

 lampreys. Test procedures are de- 

 scribed, and examples are given of data 

 obtained and of interpretation of 

 bioassay records. 



HOWELL, JOHN H., and PAUL M. THOMAS. 

 1964. Anesthetic effect of 4-styrylpyridine 

 on lamprey and fish. Trans, Amer. Fish. 

 Soc. 93(2):206-208, 



The anesthetic property of 4-styryl- 

 pyridine (4-SP) was first detected when 

 the compound was tested in a screening 

 program seeking chemicals that were 

 selectively toxic to sea lannpreys. More 

 detailed experiments on different spe- 

 cies and stages of lampreys and on 

 five bony fishes revealed anesthetic 

 action similar to that determined at 

 higher concentrations of other anes- 

 thetics. The connpound can be handled 

 safely by humans. 



HOWELL, JOHN H., vide: VERNON C. APPLE- 

 GATE. 



HUNTSMAN, A.G. 

 GALLAGHER. 



v i d ( 



HUBERT R. 



JACOBY, CARL. 



1961. Relative growth of fins in the fourhorn 

 sculpin, Myoxocephalus quadricornis, 

 from the upper Great Lakes. Copeia 

 1961(4):473-475. 



The relative lengths of all fins but the 

 caudal increased with length of the fish. 

 Relative growth of fins of immature 

 sculpins and of mature females pro- 

 ceeded along the same uninflected 

 logarithmic lines, but growth lines for 

 fins of males were inflected at the length 

 of attainment of maturity (roughly 40 

 mm., standard length). Growth constants 

 of fins of mature males ranged from 

 1.17 (pectoral) to 2.02 (second dorsal); 

 for females and inrimature fish fronn 1.04 

 (pectoral) to 1.24 (first dorsal). Males 

 invariably had the higher constants. 



JOBES, FRANK W. 



1932. Deep trapnets on Lakes Huron and 

 Michigan. The Fisherman (Grand Haven, 

 Mich.) l(3):3-4. 



An outline of the cooperative program 

 (with the Michigan Department of Con- 

 servation) to study the effects of this 

 new and unusually efficient net on stocks 

 of whitefish. 



JOBES, FRANK W. 



1933. Preliminary report on the age and 

 growth of the yellow perch ( Perca 

 flavescens Mitchill) from Lake Erie, as 

 determined from a study of its scales. 

 Pap. Mich. Acad. Sci. Arts Lett. 

 17:643-652. 



Brief report on analysis of first 2 

 years' collections in life-history study, 

 including data on age composition (evi- 

 dence of phenomenal strength of 1926 

 year class) and growth in length and 

 weight. 



JOBES, FRANK W. 



1943. The age, growth, and bathymetric 

 distribution of Reighard's chub, 

 Leucichthys reighardi Koelz, in Lake 

 Michigan. Trans. Amer. Fish. Soc, 

 72:108-135. 



Life-history and distributional study 

 based on 1930-32 collections by experi- 

 mental gill nets. Reighard's chub 

 spawned in May and June at 20-79 

 fathoms; in other months it was most 



22 



