Publications
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Evaluation of hatchery-reared lake trout for reestablishment of populations in the Apostle Islands Region of Lake Superior, 1960-84 Evaluation of hatchery-reared lake trout for reestablishment of populations in the Apostle Islands Region of Lake Superior, 1960-84
No abstract available.
Authors
Charles C. Krueger, Bruce L. Swanson, James H. Selgeby
Changes in growth and maturity of walleyes associated with stock rehabilitation in western Lake Erie, 1964-1983 Changes in growth and maturity of walleyes associated with stock rehabilitation in western Lake Erie, 1964-1983
The precipitous decline in abundance of walleyes (Stizostedion vitreum vitreum) in western Lake Erie during the 1960s caused major concerns for the future of this resource. Mercury contamination in walleyes in 1970 resulted in a moratorium on commercial fishing in United States and Canadian waters. The opportunity arose for resource agencies to develop a plan for rehabilitation of the...
Authors
Kenneth M. Muth, David R. Wolfert
Depth distribution, diet, and overwinter growth of lake trout (Salvelinus namaycush) in southeastern Lake Michigan sampled in December 1981 and March 1982 Depth distribution, diet, and overwinter growth of lake trout (Salvelinus namaycush) in southeastern Lake Michigan sampled in December 1981 and March 1982
Lake trout were collected in graded-mesh gill nets and forage fishes were collected in trawls in mid December 1981 and late March 1982. The length ranges of 317 lake trout caught in December and 138 in March were 280–767 and 286–857 mm, and the age ranges I–XI and II–XIV, respectively. Three year classes (1977–79) made up almost 80% of the catches of lake trout in both sampling periods...
Authors
Gary W. Eck, LaRue Wells
Occurrence of white bass-white perch hybrids in Lake Erie Occurrence of white bass-white perch hybrids in Lake Erie
No abstract available.
Authors
Thomas N. Todd
Salmonid whirling disease: Tubifex tubifex (Müller) identified as the essential oligochaete in the protozoan life cycle. Salmonid whirling disease: Tubifex tubifex (Müller) identified as the essential oligochaete in the protozoan life cycle.
No abstract available.
Authors
K. Wolf, M.E. Markiw, Jarl K. Hiltunen
First records of a European cladoceran, Bythotrephes cederstroemi, in Lakes Erie and Huron First records of a European cladoceran, Bythotrephes cederstroemi, in Lakes Erie and Huron
Adult forms of the cladoceran Bythotrephes cederstroemi Schoedler (Cercopagidae), a widespread European freshwater zooplankter, occurred in the stomachs of four common species of Lake Erie fish (yellow perch, Perca flavescens; white perch, Morone americana; white bass, M. chrysops; and walleye, Stizostedion vitreum vitreum) collected in early October 1985. The fish were collected at...
Authors
Michael T. Bur, David M. Klarer, Kenneth A. Krieger
Distribution of submersed macrophytes in the St. Clair-Detroit River System, 1978 Distribution of submersed macrophytes in the St. Clair-Detroit River System, 1978
An extensive survey was conducted in fall 1978 to determine the distribution and abundance of submersed macrophytes through the St. Clair-Detroit River system from Lake Huron to Lake Erie. Submersed macrophytes, representing 19 taxa, were widely distributed in the system, being found on 358 km2 (30%) of the total 1185 km2 of substrate surveyed. Of the 19 taxa identified, 8 common taxa...
Authors
Donald W. Schloesser, Bruce A. Manny
Distribution and habitat of Nitellopsis obtusa (Characeae) in the Laurentian Great Lakes Distribution and habitat of Nitellopsis obtusa (Characeae) in the Laurentian Great Lakes
Nitellopsis obtusa, a macroalga (Characeae) native to Europe and Asia, was found in U.S. waters of the St. Clair-Detroit River system in 1983, thus extending the range of this taxon into the Laurentian Great Lakes about 850 km from the St. Lawrence River where it was first discovered in North America in 1978. Its occurrence only in water frequented by commercial shipping vessels suggests...
Authors
Donald W. Schloesser, Patrick L. Hudson, S. Jerrine Nichols
Predictive models in hazard assessment of Great Lakes contaminants for fish Predictive models in hazard assessment of Great Lakes contaminants for fish
A hazard assessment scheme was developed and applied to predict potential harm to aquatic biota of nearly 500 organic compounds detected by gas chromatography/mass spectrometry (GC/MS) in Great Lakes fish. The frequency of occurrence and estimated concentrations of compounds found in lake trout (Salvelinus namaycush) and walleyes (Stizostedion vitreum vitreum) were compared with...
Authors
Dora R. May Passino
Bioaccumulation of PCBs and mercury from Toronto and Toledo Harbor sediments Bioaccumulation of PCBs and mercury from Toronto and Toledo Harbor sediments
No abstract available.
Authors
Michael J. Mac, W. A. Willford
Toxicity of toxaphene to Bosmina longirostris and Daphnia spp. (Crustacea) Toxicity of toxaphene to Bosmina longirostris and Daphnia spp. (Crustacea)
No abstract available.
Authors
Alexander J. Novak, Dora R. May Passino
Benthic community of the Savannah River below a peaking hydropower station Benthic community of the Savannah River below a peaking hydropower station
The Savannah River below Hartwell Dam, on the South Carolina-Georgia border, contains at least 206 benthic invertebrate taxa, even though this tailwater undergoes substantial daily fluctuations in water flow, temperature, and dissolved oxygen. Oligochaetes, chironomids, and amphipods dominate the community immediately below the dam. Farther downstream, larger organisms (i.e...
Authors
Patrick L. Hudson, S. Jerrine Nichols