the lawyer ( Lota maculosa ) of Lake 

 Michigan. Trans. Amer. Fish. Soc. 67: 

 155-177. 



Analysis of stomach contents showing 

 frequency of occurrence and estimated 

 volume of various food items for the 

 two species according to size of fish 

 and region of the Lake (southern, north- 

 ern, and Green Bay). Lake trout and 

 lawyers (burbot) were found to be com- 

 petitors for food, and both were preda- 

 tors on commercially valuable cor- 

 egonids. Competition was indicated also 

 between lawyers and coregonids for 

 invertebrate foods. 



VAN DOS TEN, JOHN, and HILARY J. DEASON. 



1939. The age, growth, and feeding habits of 



the whitefish, Coregonus clupeaformis 



(Mitchill), of Lake Champlain. Trans. 



Amer. Fish. Soc. 68:152-162. 



Comparison of samples from northern 

 and southern areas of the Lake. The 

 two areas were held to have distinct 

 populations because of separate spawn- 

 ing grounds and differences in size and 

 age composition, growth rate, and con- 

 dition. Invertebrates made up 99.1 per- 

 cent of the food in stomachs of southern 

 Lake Champlain whitefish; mollusks 

 (principally amnicolids) accounted for 

 92.8 percent of the total food. 



VAN OOSTEN, JOHN, and HILARY J. DEASON. 



1957. History of Red Lakes fishery, 1917-38, 



with observations on population status. 



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



Fish. 229, iii + 63 p. 



Historical account traces the devel- 

 opment of the commercial fishery from 

 its inception in 1917 through 1938. 

 Trends of production and catch per unit 

 effort are followed for principal species . 

 Life-history data are given for the 

 walleye and yellow perch. Historical 

 accounts are provided of the artificial 

 propagation of the walleye and whitefish 

 from 1918 through 1938. 



VAN OOSTEN, JOHN, H. J. DEASON, and 

 FRANK W. JOBES. 

 1934. A microprojection machine designed 

 for the study of fish scales. J. Cons. 

 9(2):241-248. 



Description, illustrated by cross- 

 section drawing and photograph, of opti- 

 cal equipment and general structural 

 specifications of machine specially 

 adapted to scale work. 



VAN OOSTEN, JOHN, and PAUL H. ESCH- 

 MEYER. 

 1956. Biology of young lake trout (Salvelinus 

 namaycush ), in Lake Michigan. Fish 

 Wildl. Serv., Res. Rep. 42, 88 p. 



Based on collections of five mesh 

 sizes (2-3/8 to 3 inches) of experi- 

 mental gill nets fished in 1930-32. 

 Includes information on: annual and 

 local variation of size, age, and growth; 

 length-weight relation and condition; 

 sex ratio; geographical and bathymetric 

 distribution; local and regional differ- 

 ences and seasonal changes in abun- 

 dance; selective action of gill nets; 

 and associated species of fish. 



VAN OOSTEN, JOHN, and RALPH HILE. 



1949. Age and growth of the lake whitefish, 



Coregonus clupeaformis (Mitchill), in 



Lake Erie. Trans. Amer. Fish. Soc. 



77:178-249. 



Analysis of production statistics, 

 1871- 1946, to bring out long-term trends 

 of yield and shifts in centers of pro- 

 duction and a general life-history study 

 including consideration of fluctuations 

 in growth and the strength of year 

 classes in relation to environmental 

 condition, length-weight relation (gen- 

 eral relation, seasonal changes of con- 

 dition, loss of weight at spawning), 

 variation of sex ratio with age and by 

 season, age at maturity, and spawning 

 season. 



VAN OOSTEN, JOHN, RALPH HILE, and 



FRANK W. JOBES. 



1946. The whitefish fishery of Lakes Huron 



and Michigan with special reference to 



the deep-trap-net fishery. Fish Wildl. 



Serv., Fish. Bull. 50:297-394. 



Review of statistics on production of 

 whitefish in all waters of Lakes Michi- 

 gan and Huron, beginning with 1879, 

 and a detailed consideration of annual 

 fluctuations of production, abundance, 

 and fishing intensity in local districts of 

 the State of Michigan waters of the 

 two Lakes, beginning with 1929, to 

 bring out the disastrous effects of 

 the deep trap net on whitefish stocks in 

 those districts in which the gear was 

 fished intensively. Includes sections on 

 bathymetric distribution and seasonal 

 movements of whitefish, lake trout, 

 walleyes, burbot, and suckers, and on 

 the fishing action of pound nets and 

 deep trap nets (relation of mesh size to 

 number and sizes of fish taken; gilling 

 and bloating of live fish at lifting; 



44 



