Recent Trends in the Abundance of Harbour Seals, Phoca vitulina , in British Columbia
Aerial censuses of harbour seals (Phoca vituiina) were conducted in the Strait of Georgia (1966–88), the lower Skeena River (1977–87), off the southwest coast of Vancouver island (1976–87), off the northeast coast of the Queen Charlotte Islands (1986), in Jervis Inlet (1987), and at the entrance to...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1990
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Online Access: | http://dx.doi.org/10.1139/f90-114 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-114 |
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crcansciencepubl:10.1139/f90-114 2024-04-07T07:55:27+00:00 Recent Trends in the Abundance of Harbour Seals, Phoca vitulina , in British Columbia Olesiuk, Peter F. Bigg, Michael A. Ellis, Graeme M. 1990 http://dx.doi.org/10.1139/f90-114 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-114 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 47, issue 5, page 992-1003 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1990 crcansciencepubl https://doi.org/10.1139/f90-114 2024-03-08T00:37:48Z Aerial censuses of harbour seals (Phoca vituiina) were conducted in the Strait of Georgia (1966–88), the lower Skeena River (1977–87), off the southwest coast of Vancouver island (1976–87), off the northeast coast of the Queen Charlotte Islands (1986), in Jervis Inlet (1987), and at the entrance to Queen Charlotte Strait (1988). The estimated number of seals in the Strait of Georgia, the primary study area, increased from 2170 in 1973 to 15 810 in 1988; the number in the lower Skeena River from 520 in 1977 to 1590 in 1987; and the number off south western Vancouver Island from 210 in 1976 to 1130 in 1987. The trends indicated that populations throughout British Columbia had been increasing at a rate of about 12.5% ∙yr −1 since 1973. Based on the density of seals in the areas surveyed, and the relative distribution of bounty and commercial kills, the total post-pupping population in British Columbia was estimated to have numbered 75 000–88 000 in 1988, compared with 9000–10 500 when the species was protected in 1970. Despite the recent increases, which probably reflect the recovery from historic kills, there was no evidence of density-dependent changes in the population growth rate. Article in Journal/Newspaper Phoca vitulina Canadian Science Publishing Queen Charlotte ENVELOPE(-132.088,-132.088,53.255,53.255) Skeena ENVELOPE(-130.198,-130.198,53.646,53.646) Skeena River ENVELOPE(-130.113,-130.113,54.015,54.015) Canadian Journal of Fisheries and Aquatic Sciences 47 5 992 1003 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Olesiuk, Peter F. Bigg, Michael A. Ellis, Graeme M. Recent Trends in the Abundance of Harbour Seals, Phoca vitulina , in British Columbia |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Aerial censuses of harbour seals (Phoca vituiina) were conducted in the Strait of Georgia (1966–88), the lower Skeena River (1977–87), off the southwest coast of Vancouver island (1976–87), off the northeast coast of the Queen Charlotte Islands (1986), in Jervis Inlet (1987), and at the entrance to Queen Charlotte Strait (1988). The estimated number of seals in the Strait of Georgia, the primary study area, increased from 2170 in 1973 to 15 810 in 1988; the number in the lower Skeena River from 520 in 1977 to 1590 in 1987; and the number off south western Vancouver Island from 210 in 1976 to 1130 in 1987. The trends indicated that populations throughout British Columbia had been increasing at a rate of about 12.5% ∙yr −1 since 1973. Based on the density of seals in the areas surveyed, and the relative distribution of bounty and commercial kills, the total post-pupping population in British Columbia was estimated to have numbered 75 000–88 000 in 1988, compared with 9000–10 500 when the species was protected in 1970. Despite the recent increases, which probably reflect the recovery from historic kills, there was no evidence of density-dependent changes in the population growth rate. |
format |
Article in Journal/Newspaper |
author |
Olesiuk, Peter F. Bigg, Michael A. Ellis, Graeme M. |
author_facet |
Olesiuk, Peter F. Bigg, Michael A. Ellis, Graeme M. |
author_sort |
Olesiuk, Peter F. |
title |
Recent Trends in the Abundance of Harbour Seals, Phoca vitulina , in British Columbia |
title_short |
Recent Trends in the Abundance of Harbour Seals, Phoca vitulina , in British Columbia |
title_full |
Recent Trends in the Abundance of Harbour Seals, Phoca vitulina , in British Columbia |
title_fullStr |
Recent Trends in the Abundance of Harbour Seals, Phoca vitulina , in British Columbia |
title_full_unstemmed |
Recent Trends in the Abundance of Harbour Seals, Phoca vitulina , in British Columbia |
title_sort |
recent trends in the abundance of harbour seals, phoca vitulina , in british columbia |
publisher |
Canadian Science Publishing |
publishDate |
1990 |
url |
http://dx.doi.org/10.1139/f90-114 http://www.nrcresearchpress.com/doi/pdf/10.1139/f90-114 |
long_lat |
ENVELOPE(-132.088,-132.088,53.255,53.255) ENVELOPE(-130.198,-130.198,53.646,53.646) ENVELOPE(-130.113,-130.113,54.015,54.015) |
geographic |
Queen Charlotte Skeena Skeena River |
geographic_facet |
Queen Charlotte Skeena Skeena River |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 47, issue 5, page 992-1003 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f90-114 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
47 |
container_issue |
5 |
container_start_page |
992 |
op_container_end_page |
1003 |
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1795672609737670656 |