We collected lake whitefish Coregonus clupeaformis and round whitefish Prosopium cylindraceum from the main basin of Lake Huron and Georgian Bay in the Laurentian Great Lakes of North America to investigate details of...We collected lake whitefish Coregonus clupeaformis and round whitefish Prosopium cylindraceum from the main basin of Lake Huron and Georgian Bay in the Laurentian Great Lakes of North America to investigate details of diet and feeding tactics of these species in different seasons. Lake whitefish supports important commercial fisheries in Lake Huron and both species make use of habitats near the Bruce Nuclear Power Development, on the eastern shore of Lake Huron. Most fish of both species showed generalist feeding behavior, but some lake whitefish appeared to show specialist prey selection. The invasive spiny water flea Bythotrephes longimanus was an important component of the diet of both species. There was considerable dietary overlap between the whitefish species, but the ecological implications of these dietary overlaps are mitigated by the fact that dominant prey species differed in most seasons. We conclude that the potential for ecologically significant interactions between lake whitefish and round whitefish resulting from competition for similar benthic food resources in the main basin of Lake Huron is probably low [Current Zoology 56 （1）： 109-117, 2010].展开更多
Dams,culverts,and other water diversion/control structures are the most widespread human alteration to riverine habitat globally.While many of these structures often serve critical services(i.e.,source of agricultural...Dams,culverts,and other water diversion/control structures are the most widespread human alteration to riverine habitat globally.While many of these structures often serve critical services(i.e.,source of agricultural and municipal water,power generation,flood protection,and sensitive ecosystem protection),they cause changes to local ecology by impeding animal movement and altering the adjoining habitat and associated ecological processes(Nilsson et al.,2005;Liermann et al.,2007).The disruption of fish movement by barriers has contributed to the decline of both migratory and non-migratory fish populations around the world.展开更多
基金part of a large, collaborative project (Whitefish Interactions with Nuclear Generating Stations, WINGS) involving the Chippewas of Nawash First Nation, the University of Guelph, Bruce Power, Inc.and Ontario Power Generation
文摘We collected lake whitefish Coregonus clupeaformis and round whitefish Prosopium cylindraceum from the main basin of Lake Huron and Georgian Bay in the Laurentian Great Lakes of North America to investigate details of diet and feeding tactics of these species in different seasons. Lake whitefish supports important commercial fisheries in Lake Huron and both species make use of habitats near the Bruce Nuclear Power Development, on the eastern shore of Lake Huron. Most fish of both species showed generalist feeding behavior, but some lake whitefish appeared to show specialist prey selection. The invasive spiny water flea Bythotrephes longimanus was an important component of the diet of both species. There was considerable dietary overlap between the whitefish species, but the ecological implications of these dietary overlaps are mitigated by the fact that dominant prey species differed in most seasons. We conclude that the potential for ecologically significant interactions between lake whitefish and round whitefish resulting from competition for similar benthic food resources in the main basin of Lake Huron is probably low [Current Zoology 56 （1）： 109-117, 2010].
文摘Dams,culverts,and other water diversion/control structures are the most widespread human alteration to riverine habitat globally.While many of these structures often serve critical services(i.e.,source of agricultural and municipal water,power generation,flood protection,and sensitive ecosystem protection),they cause changes to local ecology by impeding animal movement and altering the adjoining habitat and associated ecological processes(Nilsson et al.,2005;Liermann et al.,2007).The disruption of fish movement by barriers has contributed to the decline of both migratory and non-migratory fish populations around the world.
