The influence of population dynamics and environmental conditions on pink salmon ( Oncorhynchus gorbuscha) recolonization after barrier removal in the Fraser River, British Columbia, Canada
When barriers are removed, what biotic and abiotic factors determine how fish populations will colonize newly available habitats? We used counts of adult pink salmon ( Oncorhywnchus gorbuscha ) from 1947 to 1987 in 66 streams of the Fraser River system, British Columbia, Canada, to determine when co...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/f2012-030 2024-09-30T14:40:54+00:00 The influence of population dynamics and environmental conditions on pink salmon ( Oncorhynchus gorbuscha) recolonization after barrier removal in the Fraser River, British Columbia, Canada Pess, G.R. Hilborn, R. Kloehn, K. Quinn, T.P. Bradford, Michael 2012 http://dx.doi.org/10.1139/f2012-030 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2012-030 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2012-030 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 69, issue 5, page 970-982 ISSN 0706-652X 1205-7533 journal-article 2012 crcansciencepubl https://doi.org/10.1139/f2012-030 2024-09-19T04:09:48Z When barriers are removed, what biotic and abiotic factors determine how fish populations will colonize newly available habitats? We used counts of adult pink salmon ( Oncorhywnchus gorbuscha ) from 1947 to 1987 in 66 streams of the Fraser River system, British Columbia, Canada, to determine when colonizing pink salmon populations became self-sustaining after a long-term migration blockage at Hell’s Gate (river kilometre 209) was reduced. The abundance of salmon in available habitats were largely controlled by extrinsic factors such as an initially large source population, high intrinsic growth rates linked to favorable climate-driven conditions, a constant supply of dispersers, and large amounts of newly available habitat. Temporal variation in flows at Hell’s Gate also affected recolonization success. Self-sustaining populations were developed within years of barrier removal and have continued to help expand the overall population of Fraser River pink salmon. However, pink salmon were considerably more abundant in the early 1900s than in the 1980s (∼48 million vs. ∼2.7 million), and the majority of spawning shifted from the historic areas above Hell’s Gate prior to the rockslide to below Hell’s Gate in the lower Fraser River after the long-term blockage was reduced, so the system has not returned to the former abundance and distribution patterns. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing Canada British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Fraser River ENVELOPE(-62.243,-62.243,56.619,56.619) Canadian Journal of Fisheries and Aquatic Sciences 69 5 970 982 |
institution |
Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
When barriers are removed, what biotic and abiotic factors determine how fish populations will colonize newly available habitats? We used counts of adult pink salmon ( Oncorhywnchus gorbuscha ) from 1947 to 1987 in 66 streams of the Fraser River system, British Columbia, Canada, to determine when colonizing pink salmon populations became self-sustaining after a long-term migration blockage at Hell’s Gate (river kilometre 209) was reduced. The abundance of salmon in available habitats were largely controlled by extrinsic factors such as an initially large source population, high intrinsic growth rates linked to favorable climate-driven conditions, a constant supply of dispersers, and large amounts of newly available habitat. Temporal variation in flows at Hell’s Gate also affected recolonization success. Self-sustaining populations were developed within years of barrier removal and have continued to help expand the overall population of Fraser River pink salmon. However, pink salmon were considerably more abundant in the early 1900s than in the 1980s (∼48 million vs. ∼2.7 million), and the majority of spawning shifted from the historic areas above Hell’s Gate prior to the rockslide to below Hell’s Gate in the lower Fraser River after the long-term blockage was reduced, so the system has not returned to the former abundance and distribution patterns. |
author2 |
Bradford, Michael |
format |
Article in Journal/Newspaper |
author |
Pess, G.R. Hilborn, R. Kloehn, K. Quinn, T.P. |
spellingShingle |
Pess, G.R. Hilborn, R. Kloehn, K. Quinn, T.P. The influence of population dynamics and environmental conditions on pink salmon ( Oncorhynchus gorbuscha) recolonization after barrier removal in the Fraser River, British Columbia, Canada |
author_facet |
Pess, G.R. Hilborn, R. Kloehn, K. Quinn, T.P. |
author_sort |
Pess, G.R. |
title |
The influence of population dynamics and environmental conditions on pink salmon ( Oncorhynchus gorbuscha) recolonization after barrier removal in the Fraser River, British Columbia, Canada |
title_short |
The influence of population dynamics and environmental conditions on pink salmon ( Oncorhynchus gorbuscha) recolonization after barrier removal in the Fraser River, British Columbia, Canada |
title_full |
The influence of population dynamics and environmental conditions on pink salmon ( Oncorhynchus gorbuscha) recolonization after barrier removal in the Fraser River, British Columbia, Canada |
title_fullStr |
The influence of population dynamics and environmental conditions on pink salmon ( Oncorhynchus gorbuscha) recolonization after barrier removal in the Fraser River, British Columbia, Canada |
title_full_unstemmed |
The influence of population dynamics and environmental conditions on pink salmon ( Oncorhynchus gorbuscha) recolonization after barrier removal in the Fraser River, British Columbia, Canada |
title_sort |
influence of population dynamics and environmental conditions on pink salmon ( oncorhynchus gorbuscha) recolonization after barrier removal in the fraser river, british columbia, canada |
publisher |
Canadian Science Publishing |
publishDate |
2012 |
url |
http://dx.doi.org/10.1139/f2012-030 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2012-030 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2012-030 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-62.243,-62.243,56.619,56.619) |
geographic |
Canada British Columbia Fraser River |
geographic_facet |
Canada British Columbia Fraser River |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 69, issue 5, page 970-982 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f2012-030 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
69 |
container_issue |
5 |
container_start_page |
970 |
op_container_end_page |
982 |
_version_ |
1811643361610694656 |