Distribution of Fish Species in Great Bear Lake, Northwest Territories, with Reference to Zooplankton, Benthic Invertebrates, and Environmental Conditions
Benthic invertebrates in Great Bear Lake are most highly concentrated in the upper 20 m. Densities between 20 and 100 m are low; below 100 m only Mysis relicta and Myoxocephalus quadricornis exist at measurable densities. All benthic organisms exhibit a high degree of patchiness.Lake trout, Salvelin...
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1975
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Online Access: | http://dx.doi.org/10.1139/f75-235 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-235 |
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crcansciencepubl:10.1139/f75-235 2024-03-03T08:43:35+00:00 Distribution of Fish Species in Great Bear Lake, Northwest Territories, with Reference to Zooplankton, Benthic Invertebrates, and Environmental Conditions Johnson, Lionel 1975 http://dx.doi.org/10.1139/f75-235 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-235 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 32, issue 11, page 1989-2004 ISSN 0015-296X journal-article 1975 crcansciencepubl https://doi.org/10.1139/f75-235 2024-02-07T10:53:40Z Benthic invertebrates in Great Bear Lake are most highly concentrated in the upper 20 m. Densities between 20 and 100 m are low; below 100 m only Mysis relicta and Myoxocephalus quadricornis exist at measurable densities. All benthic organisms exhibit a high degree of patchiness.Lake trout, Salvelinus namaycush, and M. quadricornis are two species that inhabit the lake at all depths (3–400 m) and temperatures (13.2 C for M. quadricornis and 15 C for S. namaycush).Whitefish, Coregonus clupeaformis, inhabit only the bays, seldom being caught in water over 20 m deep. The distribution of whitefish is considered to be restricted mainly by the density of benthic organisms.Three species are confined to the periphery of the lake, Stizostedion vitreum, Lota lota, and Catostomus catostomus. Two species, Couesius plumbeus and Percopsis omiscomaycus, are present in the headwaters and Great Bear River but have not been able to establish themselves in Great Bear Lake. Extreme oligotrophy is considered to have had the effect of reducing species diversity. Article in Journal/Newspaper Catostomus catostomus Great Bear Lake Lota lota Northwest Territories lota Canadian Science Publishing Northwest Territories Great Bear Lake ENVELOPE(-120.753,-120.753,65.834,65.834) Great Bear River ENVELOPE(-125.604,-125.604,64.902,64.902) Journal of the Fisheries Research Board of Canada 32 11 1989 2004 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Benthic invertebrates in Great Bear Lake are most highly concentrated in the upper 20 m. Densities between 20 and 100 m are low; below 100 m only Mysis relicta and Myoxocephalus quadricornis exist at measurable densities. All benthic organisms exhibit a high degree of patchiness.Lake trout, Salvelinus namaycush, and M. quadricornis are two species that inhabit the lake at all depths (3–400 m) and temperatures (13.2 C for M. quadricornis and 15 C for S. namaycush).Whitefish, Coregonus clupeaformis, inhabit only the bays, seldom being caught in water over 20 m deep. The distribution of whitefish is considered to be restricted mainly by the density of benthic organisms.Three species are confined to the periphery of the lake, Stizostedion vitreum, Lota lota, and Catostomus catostomus. Two species, Couesius plumbeus and Percopsis omiscomaycus, are present in the headwaters and Great Bear River but have not been able to establish themselves in Great Bear Lake. Extreme oligotrophy is considered to have had the effect of reducing species diversity. |
format |
Article in Journal/Newspaper |
author |
Johnson, Lionel |
spellingShingle |
Johnson, Lionel Distribution of Fish Species in Great Bear Lake, Northwest Territories, with Reference to Zooplankton, Benthic Invertebrates, and Environmental Conditions |
author_facet |
Johnson, Lionel |
author_sort |
Johnson, Lionel |
title |
Distribution of Fish Species in Great Bear Lake, Northwest Territories, with Reference to Zooplankton, Benthic Invertebrates, and Environmental Conditions |
title_short |
Distribution of Fish Species in Great Bear Lake, Northwest Territories, with Reference to Zooplankton, Benthic Invertebrates, and Environmental Conditions |
title_full |
Distribution of Fish Species in Great Bear Lake, Northwest Territories, with Reference to Zooplankton, Benthic Invertebrates, and Environmental Conditions |
title_fullStr |
Distribution of Fish Species in Great Bear Lake, Northwest Territories, with Reference to Zooplankton, Benthic Invertebrates, and Environmental Conditions |
title_full_unstemmed |
Distribution of Fish Species in Great Bear Lake, Northwest Territories, with Reference to Zooplankton, Benthic Invertebrates, and Environmental Conditions |
title_sort |
distribution of fish species in great bear lake, northwest territories, with reference to zooplankton, benthic invertebrates, and environmental conditions |
publisher |
Canadian Science Publishing |
publishDate |
1975 |
url |
http://dx.doi.org/10.1139/f75-235 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-235 |
long_lat |
ENVELOPE(-120.753,-120.753,65.834,65.834) ENVELOPE(-125.604,-125.604,64.902,64.902) |
geographic |
Northwest Territories Great Bear Lake Great Bear River |
geographic_facet |
Northwest Territories Great Bear Lake Great Bear River |
genre |
Catostomus catostomus Great Bear Lake Lota lota Northwest Territories lota |
genre_facet |
Catostomus catostomus Great Bear Lake Lota lota Northwest Territories lota |
op_source |
Journal of the Fisheries Research Board of Canada volume 32, issue 11, page 1989-2004 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f75-235 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
32 |
container_issue |
11 |
container_start_page |
1989 |
op_container_end_page |
2004 |
_version_ |
1792499031920869376 |