Publications
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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. Lake trout
Authors
Gary W. Eck, LaRue Wells
Evaluation of coded wire tags for marking lake trout
Among hatchery-reared lake trout (Salvelinus namaycush) of the 1979-1982 year classes stocked in New York waters of Lake Ontario, more than 3 million fish were marked with a coded wire tag (CWT) plus an adipose fin clip, and 1.5 million with only conventional fin clips. Altogether, 7,640 tags were recovered from fish collected with bottom trawls and gill nets or caught by anglers during 1980-1983.
Authors
Joseph H. Elrod, Clifford P. Schneider
The North American Benthological Society
No abstract available.
Authors
David D. Herlong, Patrick L. Hudson
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 walleye stoc
Authors
Kenneth M. Muth, David R. Wolfert
Toxicity of toxaphene to Bosmina longirostris and Daphnia spp. (Crustacea)
No abstract available.Â
Authors
Alexander J. Novak, Dora R. May Passino
Bioaccumulation of PCBs and mercury from Toronto and Toledo Harbor sediments
No abstract available.
Authors
Michael J. Mac, W. A. Willford
A field guide to valuable underwater aquatic plants of the Great Lakes
Underwater plants are a valuable part of the Great Lakes ecosystem, providing food and shelter for aquatic animals. Aquatic plants also help stabilize sediments, thereby reducing shoreline erosion. Annual fall die-offs of underwater plants provide food and shelter for overwintering small aquatic animals such as insects, snails, and freshwater shrimp.
In some areas, underwater plants may be the dom
Authors
Donald W. Schloesser
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
Growth of submersed macrophyte communities in the St. Clair - Detroit River system between Lake Huron and Lake Erie
Growth of submersed aquatic macrophytes was determined from observation and on the basis of biomass of samples collected from April to November 1978 at seven study sites in a major river system of the Great Lakes, the St. Clair – Detroit river system between Lake Huron and Lake Erie. Growth usually began between April and June, peaked between July and October, and decreased by late November. Maxim
Authors
Donald W. Schloesser, Thomas A. Edsall, Bruce A. Manny
Population dynamics and interagency management of the bloater (Coregonus hoyi) in Lake Michigan, 1967-1982
This paper examines the population dynamics of the bloater (Coregonus hoyi) in Lake Michigan during a progressive decline in abundance from about the mid1960s through the mid1970s, and during a subsequent recovery that is still underway. The study focused on developing a data base and methodology for projecting fishable surpluses, in cooperation with a chub technical committee sponsored by the Gre
Authors
Edward H. Brown, Ronald W. Rybicki, Ronald J. Poff
Lake Michigan's capacity to support lake trout (Salvelinus namaycush) and other salmonines: an estimate based on the status of prey populations in the 1970s
We used a mass balance equation relating total mortality of age II and older alewives (Alosa pseudoharengus) to their removals by predatory fish and other sources of mortality as the basis for estimating that the forage base in Lake Michigan could support an additional 13 000 to 21 000 t of lake trout (Salvelinus namaycush) or a total lake trout biomass between 15 000 and 23 000 t. This biomass es
Authors
Gary W. Eck, Edward H. Brown
Comparison of methods for measuring surface area of submersed aquatic macrophytes
The surface area of submersed macrophytes is often viewed from different perspectives such as substrate for colonization by periphyton, or protective cover for fishes. Consequently, several different methods have been used to measure it. We describe a method for measuring that area with an electronic surface area meter, a device that yields, for large samples of macrophytes, measurements in units
Authors
Charles L. Brown, Bruce A. Manny