Publications
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Filter Total Items: 2699
Patterns of PCB accumulation by fry of lake trout Patterns of PCB accumulation by fry of lake trout
No abstract available.
Authors
Michael J. Mac, James G. Seelye
Potential influence of acetone in aquatic bioassays testing the dynamics and effects of PCBs Potential influence of acetone in aquatic bioassays testing the dynamics and effects of PCBs
No abstract available.
Authors
Michael J. Mac, James G. Seelye
Comparative hatchability of lake trout eggs differing in contaminant burden and incubation conditions Comparative hatchability of lake trout eggs differing in contaminant burden and incubation conditions
In 1972, fertilized eggs of lake trout (Salvelinus namaycush) from the Marquette (Michigan) State Fish Hatchery (where levels of contaminants are relatively low) and eggs from lake trout collected in Michigan waters of Lake Michigan near Saugatuck and Charlevoix (where levels of PCB's and DDE are elevated) were incubated at hatchery temperatures (6° C) and at temperatures simulating the...
Authors
M. J. Mac, W.H. Berlin, D. V. Rottiers
Size-specific mortality in fry of lake trout (Salvelinus namaycush) from Lake Michigan Size-specific mortality in fry of lake trout (Salvelinus namaycush) from Lake Michigan
No abstract available.
Authors
James G. Seelye, Michael J. Mac
Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in southeastern Lake Michigan 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...
Authors
LaRue Wells
Differentiation in Coregonus zenithicus in Lake Superior Differentiation in Coregonus zenithicus in Lake Superior
Morphological variation in Coregonus zenithicus has long plagued biologists working on Lake Superior ciscoes. Some of this variation is due to allometric growth; earlier workers incorrectly recognized large C. zenithicus as a distinct species, C. nigripinnis cyanopterus. Coregonus reighardi dymondi is a variant of C. zenithicus in northern bays of Lake Superior and Lake Nipigon. The...
Authors
Thomas N. Todd, Gerald R. Smith
Role of physical barriers in the control of sea lamprey (Petromyzon marinus) Role of physical barriers in the control of sea lamprey (Petromyzon marinus)
Mechanical and electromechanical barriers played a significant role in the initial attempts to control sea lamprey (Petromyzon marinus) populations in the upper Great Lakes. More recently electromechanical weirs have been used to assess the relative abundance of spawning-run sea lampreys in Lake Superior. Development of an integrated control approach to sea lamprey control has stimulated...
Authors
J. B. Hunn, W.D. Youngs
Food of alewives, yellow perch, spottail shiners, trout-perch, and slimy and fourhorn sculpins in southeastern Lake Michigan 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...
Authors
LaRue Wells
Lake trout (Salvelinus namaycush) and sea lamprey (Petromyzon marinus) populations in Lake Michigan, 1971-78 Lake trout (Salvelinus namaycush) and sea lamprey (Petromyzon marinus) populations in Lake Michigan, 1971-78
Lake trout (Salvelinus namaycush) was exterminated in Lake Michigan by the mid-1950s as a result of the combined effects of an intensive fishery and predation by the sea lamprey (Petromyzon marinus). The widespread application of lampricide in tributary streams had greatly reduced the abundance of lampreys by the early 1960s, and a program to restore self-sustaining populations of lake...
Authors
LaRue Wells
Changes in mortality of lake trout (Salvelinus namaycush) in Michigan waters of Lake Superior in relation to sea lamprey (Petromyzon marinus) predation, 1968-78 Changes in mortality of lake trout (Salvelinus namaycush) in Michigan waters of Lake Superior in relation to sea lamprey (Petromyzon marinus) predation, 1968-78
Total mortality rates of lake trout (Salvelinus namaycush) of age VII and older from eastern Lake Superior were estimated from catch curves of age distributions each year in 1968–78. The instantaneous rate of total mortality Z varied from 0.62 to 2.31 in close synchrony with sea lamprey (Petromyzon marinus) wounding rates on lake trout. The regression of transformed Z on the index of...
Authors
Richard L. Pycha
Fish-stock assessment in the Great Lakes Fish-stock assessment in the Great Lakes
No abstract available.
Authors
Wilbur L. Hartman