Ecology of Arctic Populations of Lake Trout, Salvelinus namaycush , Lake Whitefish, Coregonus clupeaformis , Arctic Char, S . alpinus , and Associated Species in Unexploited Lakes of the Canadian Northwest Territories
The available data on the fish populations of 35 lakes in the Northwest Territories are examined. The lakes range in size from Great Bear Lake (31, 156 km 2 ) to Keyhole Lake (46 ha); they are situated between lat. 60 and 75° N, east from the Mackenzie River to the west coast of Hudson Bay. Lake tro...
Published in: | Journal of the Fisheries Research Board of Canada |
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Canadian Science Publishing
1976
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Online Access: | http://dx.doi.org/10.1139/f76-293 http://www.nrcresearchpress.com/doi/pdf/10.1139/f76-293 |
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crcansciencepubl:10.1139/f76-293 2023-12-17T10:25:21+01:00 Ecology of Arctic Populations of Lake Trout, Salvelinus namaycush , Lake Whitefish, Coregonus clupeaformis , Arctic Char, S . alpinus , and Associated Species in Unexploited Lakes of the Canadian Northwest Territories Johnson, Lionel 1976 http://dx.doi.org/10.1139/f76-293 http://www.nrcresearchpress.com/doi/pdf/10.1139/f76-293 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 33, issue 11, page 2459-2488 ISSN 0015-296X General Medicine journal-article 1976 crcansciencepubl https://doi.org/10.1139/f76-293 2023-11-19T13:39:01Z The available data on the fish populations of 35 lakes in the Northwest Territories are examined. The lakes range in size from Great Bear Lake (31, 156 km 2 ) to Keyhole Lake (46 ha); they are situated between lat. 60 and 75° N, east from the Mackenzie River to the west coast of Hudson Bay. Lake trout (Salvelinus namaycush) and whitefish (Coregonus clupeaformis) form the main populations of the mainland lakes and together make up to 95% of the total catch. There is a trend toward increasing importance of whitefish with decreasing severity of conditions. Most populations show a uni, bi-, or trimodal length distribution; age distributions are unimodal. No change in these distributions was observed over a large number of years in certain lakes. These populations are considered to have reached a climax condition comparable with a vegetational climax, and are therefore in equilibrium with their environment. All incoming energy is ultimately used in respiration to support a high biomass of fish. Article in Journal/Newspaper Arctic Great Bear Lake Hudson Bay Mackenzie river Northwest Territories Canadian Science Publishing (via Crossref) Arctic Northwest Territories Hudson Bay Mackenzie River Hudson Great Bear Lake ENVELOPE(-120.753,-120.753,65.834,65.834) Keyhole ENVELOPE(-67.338,-67.338,-68.785,-68.785) Bay Lake ENVELOPE(-100.964,-100.964,56.759,56.759) Namaycush Lake ENVELOPE(-108.367,-108.367,70.808,70.808) Keyhole Lake ENVELOPE(163.683,163.683,-78.133,-78.133) Journal of the Fisheries Research Board of Canada 33 11 2459 2488 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Medicine |
spellingShingle |
General Medicine Johnson, Lionel Ecology of Arctic Populations of Lake Trout, Salvelinus namaycush , Lake Whitefish, Coregonus clupeaformis , Arctic Char, S . alpinus , and Associated Species in Unexploited Lakes of the Canadian Northwest Territories |
topic_facet |
General Medicine |
description |
The available data on the fish populations of 35 lakes in the Northwest Territories are examined. The lakes range in size from Great Bear Lake (31, 156 km 2 ) to Keyhole Lake (46 ha); they are situated between lat. 60 and 75° N, east from the Mackenzie River to the west coast of Hudson Bay. Lake trout (Salvelinus namaycush) and whitefish (Coregonus clupeaformis) form the main populations of the mainland lakes and together make up to 95% of the total catch. There is a trend toward increasing importance of whitefish with decreasing severity of conditions. Most populations show a uni, bi-, or trimodal length distribution; age distributions are unimodal. No change in these distributions was observed over a large number of years in certain lakes. These populations are considered to have reached a climax condition comparable with a vegetational climax, and are therefore in equilibrium with their environment. All incoming energy is ultimately used in respiration to support a high biomass of fish. |
format |
Article in Journal/Newspaper |
author |
Johnson, Lionel |
author_facet |
Johnson, Lionel |
author_sort |
Johnson, Lionel |
title |
Ecology of Arctic Populations of Lake Trout, Salvelinus namaycush , Lake Whitefish, Coregonus clupeaformis , Arctic Char, S . alpinus , and Associated Species in Unexploited Lakes of the Canadian Northwest Territories |
title_short |
Ecology of Arctic Populations of Lake Trout, Salvelinus namaycush , Lake Whitefish, Coregonus clupeaformis , Arctic Char, S . alpinus , and Associated Species in Unexploited Lakes of the Canadian Northwest Territories |
title_full |
Ecology of Arctic Populations of Lake Trout, Salvelinus namaycush , Lake Whitefish, Coregonus clupeaformis , Arctic Char, S . alpinus , and Associated Species in Unexploited Lakes of the Canadian Northwest Territories |
title_fullStr |
Ecology of Arctic Populations of Lake Trout, Salvelinus namaycush , Lake Whitefish, Coregonus clupeaformis , Arctic Char, S . alpinus , and Associated Species in Unexploited Lakes of the Canadian Northwest Territories |
title_full_unstemmed |
Ecology of Arctic Populations of Lake Trout, Salvelinus namaycush , Lake Whitefish, Coregonus clupeaformis , Arctic Char, S . alpinus , and Associated Species in Unexploited Lakes of the Canadian Northwest Territories |
title_sort |
ecology of arctic populations of lake trout, salvelinus namaycush , lake whitefish, coregonus clupeaformis , arctic char, s . alpinus , and associated species in unexploited lakes of the canadian northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1976 |
url |
http://dx.doi.org/10.1139/f76-293 http://www.nrcresearchpress.com/doi/pdf/10.1139/f76-293 |
long_lat |
ENVELOPE(-120.753,-120.753,65.834,65.834) ENVELOPE(-67.338,-67.338,-68.785,-68.785) ENVELOPE(-100.964,-100.964,56.759,56.759) ENVELOPE(-108.367,-108.367,70.808,70.808) ENVELOPE(163.683,163.683,-78.133,-78.133) |
geographic |
Arctic Northwest Territories Hudson Bay Mackenzie River Hudson Great Bear Lake Keyhole Bay Lake Namaycush Lake Keyhole Lake |
geographic_facet |
Arctic Northwest Territories Hudson Bay Mackenzie River Hudson Great Bear Lake Keyhole Bay Lake Namaycush Lake Keyhole Lake |
genre |
Arctic Great Bear Lake Hudson Bay Mackenzie river Northwest Territories |
genre_facet |
Arctic Great Bear Lake Hudson Bay Mackenzie river Northwest Territories |
op_source |
Journal of the Fisheries Research Board of Canada volume 33, issue 11, page 2459-2488 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f76-293 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
33 |
container_issue |
11 |
container_start_page |
2459 |
op_container_end_page |
2488 |
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1785575859583713280 |