Publications
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The commercial fishery for walleyes in New York waters of Lake Erie, 1959-1978
A limited commercial gill-net fishery for walleyes (Stizostedion vitreum vitreum) in New York waters of Lake Erie was established in the 1950's. Since then year class strengths have varied considerably; four have been outstanding- those of 1959, 1962, 1964, and 1971. A rapid rate of rise in water temperature during spawning and incubation was positively correlated with the strength of these year c
Authors
D.R. Wolfert
Environmental and genetic contributions to morphological differentiation in ciscoes (Coregoninae) of the Great Lakes
Laboratory-produced progeny of Coregonus alpenae, C. zenithicus, C. hoyi, and C. kiyi and their wild parents were used to examine the contributions of genotype and environment to morphology. Morphological differences between parents and offspring were generally greater than those between species, indicating strong environmental effects. The phenotypic effects on most characters can probably be att
Authors
Thomas N. Todd, Gerald R. Smith, Louella E. Cable
Allelic variability in species and stocks of Lake Superior ciscoes (Coregoninae)
Starch gel electrophoresis was used as a means of recognizing species and stocks in Lake Superior Coregonus. Allelic variability at isocitrate dehydrogenase and glycerol-3-phosphate dehydrogenase loci was recorded for samples of lake herring (Coregonus artedii), bloater (C. hoyi), kiyi (C. kiyi), and shortjaw cisco (C. zenithicus) from five Lake Superior localities. The observed frequencies of gen
Authors
Thomas N. Todd
Coregonus prognathus Smith: a nomen dubium
No unique phenotypes were observed among the specimens and no single species clearly dominated the samples. I conclude therefore that the species Coregonus prognathus has no taxonomic validity. Because of the poor condition and uncertain identity of the holotype, Coregonus prognathus should be considered a nomen dubium.
Authors
Thomas N. Todd
Size-specific mortality in fry of lake trout (Salvelinus namaycush) from Lake Michigan
No abstract available.
Authors
James G. Seelye, Michael J. Mac
Potential influence of acetone in aquatic bioassays testing the dynamics and effects of PCBs
No abstract available.
Authors
Michael J. Mac, James G. Seelye
Substrate conditions and abundance of lake trout eggs in a traditional spawning area in southeastern Lake Michigan
Spawning by planted lake trout (Salvelinus namaycush) was documented by sampling with a diver-assisted pump in a traditional spawning area in southeastern Lake Michigan near Saugatuck, Michigan in mid-November in 1978 and 1979. Bottom depths at the 11 locations sampled ranged from 3 to 12 m and substrate size from boulders to sand. Periphyton (Cladophora and associated biota) was several millimete
Authors
John A. Dorr, Daniel V. O'Connor, Neal R. Foster, David J. Jude
Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in southeastern Lake Michigan
Stomachs of 1,064 alewives (Alosa pseudoharengus), 1,103 yellow perch (Perca flavescens), 246 spottail shiners (Notropis hudsonius), 288 trout-perch (Percopsis omiscomaycus), 454 slimy sculpins (Cottus cognatus), and 562 fourhorn sculpins (Myoxocephalus quadricornis) from Lake Michigan were examined for food contents. Fish were sampled primarily from March to November and nearly all were caught at
Authors
LaRue Wells
Chlorinated hydrocarbons as a limiting factor in the reproduction of lake trout in Lake Michigan
No abstract available.
Authors
Wayne A. Willford
Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in southeastern Lake Michigan
Stomachs of 1, 064 alewives (Alosa pseudoharengus), 1, 103 yellow perch (Perca flavescens), 246 spottail shiners (Notropis hudsonius), 288 trout-perch (Percopsis omiscomaycus), 454 slimy sculpins (Cottus cognatus), and 562 fourhorn sculpins (Myoxocephalus quadricornis) from Lake Michigan were examined for food contents. Fish were sampled primarily from March to November and nearly all were caught
Authors
LaRue Wells
Minimum size limits for yellow perch (Perca flavescens) in western Lake Erie
During the 1960's yellow perch (Perca flavescens) of Lake Erie supported a commercial fishery that produced an average annual catch of 23 million pounds, as well as a modest sport fishery. Since 1969, the resource has seriously deteriorated. Commercial landings amounted to only 6 million pounds in 1976, and included proportionally more immature perch than in the 1960's. Moreover, no strong year cl
Authors
Wilbur L. Hartman, Stephen J. Nepszy, Russell L. Scholl