Foraging mechanisms of siscowet lake trout (Salvelinus namaycush siscowet) on pelagic prey
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منابع مشابه
Climate Change Expands the Spatial Extent and Duration of Preferred Thermal Habitat for Lake Superior Fishes
Climate change is expected to alter species distributions and habitat suitability across the globe. Understanding these shifting distributions is critical for adaptive resource management. The role of temperature in fish habitat and energetics is well established and can be used to evaluate climate change effects on habitat distributions and food web interactions. Lake Superior water temperatur...
متن کاملMorphological and Ecological Differences Between Shallow- and Deep-water Lake Trout in Lake Mistassini, Quebec
Lake trout (Salvelinus namaycush) in Lake Mistassini, Quebec, were investigated to determine whether they resembled the lean and siscowet morphotypes of Lake Superior and Great Slave Lake. Lake trout caught in deep water were predicted to resemble the siscowet morphotype and to be better adapted for vertical migration (i.e., low percent buoyancy) than those caught in shallow water. The research...
متن کاملA genetic basis for the phenotypic differentiation between siscowet and lean lake trout (Salvelinus namaycush).
In Lake Superior there are three principal forms of lake trout (Salvelinus namaycush): lean, siscowet and humper. Wild lean and siscowet differ in the shape and relative size of the head, size of the fins, location and size of the eyes, caudal peduncle shape and lipid content of the musculature. To investigate the basis for these phenotypic differences, lean and siscowet lake trout, derived fro...
متن کاملHarvest and Relative Abundance of Siscowet Lake Trout in Michigan Waters of Lake Superior, 1929–1961
—Siscowet, a deepwater morphotype of lake trout Salvelinus namaycush and the top predator in Lake Superior, currently makes up most of the lake trout biomass in this lake. Anecdotal accounts indicate that siscowets made up some portion of the historical lake trout commercial fishery, but estimates of harvest and relative abundance are lacking. By using the location information provided by histo...
متن کاملDiel vertical migration in the Lake Superior pelagic community. I. Changes in vertical migration of coregonids in response to varying predation risk
The distribution of fishes is influenced by a host of physico-chemical and biological variables, including temperature and oxygen, prey abundance, feeding or assimilation rates, and predation risk. We used hydroacoustics and midwater trawls to measure the vertical distribution of pelagic fishes during a series of research cruises on Lake Superior’s western arm in 2001 and 2004. Our objective wa...
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تاریخ انتشار 2015