Marine growth patterns of southern British Columbia chum salmon explained by interactions between density-dependent competition and changing climate
Thirty-nine years of scale growth measurements from Big Qualicum River chum salmon (Oncorhynchus keta) in southern British Columbia demonstrated that competition and climate variation affect marine growth and age-at-maturity. A longitudinal study design that accounted for correlation among individua...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
2017
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Online Access: | http://dx.doi.org/10.1139/cjfas-2016-0265 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0265 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0265 |
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crcansciencepubl:10.1139/cjfas-2016-0265 2024-06-23T07:55:56+00:00 Marine growth patterns of southern British Columbia chum salmon explained by interactions between density-dependent competition and changing climate Debertin, Allan J. Irvine, James R. Holt, Carrie A. Oka, Gladys Trudel, Marc 2017 http://dx.doi.org/10.1139/cjfas-2016-0265 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0265 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0265 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 74, issue 7, page 1077-1087 ISSN 0706-652X 1205-7533 journal-article 2017 crcansciencepubl https://doi.org/10.1139/cjfas-2016-0265 2024-06-06T04:11:15Z Thirty-nine years of scale growth measurements from Big Qualicum River chum salmon (Oncorhynchus keta) in southern British Columbia demonstrated that competition and climate variation affect marine growth and age-at-maturity. A longitudinal study design that accounted for correlation among individuals revealed growth at all ages was reduced when the biomass of North American chum, sockeye (Oncorhynchus nerka), and pink salmon (Oncorhynchus gorbuscha) was high. When North Pacific Gyre Oscillation (NPGO) was positive, indicating increased primary productivity, predicted growth increased. Climate variation influenced competition effects. For instance, density-dependent competition effects increased when NPGO became more positive and Pacific Decadal Oscillation became more negative (indicating cool conditions), causing the greatest range in predicted scale size. Chum salmon are likely to exhibit continued reduction in growth at age due to increased ocean temperatures driven by climate change and high aggregate salmon biomass that includes hatchery releases. If evidence of biomass and climate effects presented here are common among Pacific salmon populations, reduction of hatchery releases should be considered. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) Canadian Journal of Fisheries and Aquatic Sciences 74 7 1077 1087 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Thirty-nine years of scale growth measurements from Big Qualicum River chum salmon (Oncorhynchus keta) in southern British Columbia demonstrated that competition and climate variation affect marine growth and age-at-maturity. A longitudinal study design that accounted for correlation among individuals revealed growth at all ages was reduced when the biomass of North American chum, sockeye (Oncorhynchus nerka), and pink salmon (Oncorhynchus gorbuscha) was high. When North Pacific Gyre Oscillation (NPGO) was positive, indicating increased primary productivity, predicted growth increased. Climate variation influenced competition effects. For instance, density-dependent competition effects increased when NPGO became more positive and Pacific Decadal Oscillation became more negative (indicating cool conditions), causing the greatest range in predicted scale size. Chum salmon are likely to exhibit continued reduction in growth at age due to increased ocean temperatures driven by climate change and high aggregate salmon biomass that includes hatchery releases. If evidence of biomass and climate effects presented here are common among Pacific salmon populations, reduction of hatchery releases should be considered. |
format |
Article in Journal/Newspaper |
author |
Debertin, Allan J. Irvine, James R. Holt, Carrie A. Oka, Gladys Trudel, Marc |
spellingShingle |
Debertin, Allan J. Irvine, James R. Holt, Carrie A. Oka, Gladys Trudel, Marc Marine growth patterns of southern British Columbia chum salmon explained by interactions between density-dependent competition and changing climate |
author_facet |
Debertin, Allan J. Irvine, James R. Holt, Carrie A. Oka, Gladys Trudel, Marc |
author_sort |
Debertin, Allan J. |
title |
Marine growth patterns of southern British Columbia chum salmon explained by interactions between density-dependent competition and changing climate |
title_short |
Marine growth patterns of southern British Columbia chum salmon explained by interactions between density-dependent competition and changing climate |
title_full |
Marine growth patterns of southern British Columbia chum salmon explained by interactions between density-dependent competition and changing climate |
title_fullStr |
Marine growth patterns of southern British Columbia chum salmon explained by interactions between density-dependent competition and changing climate |
title_full_unstemmed |
Marine growth patterns of southern British Columbia chum salmon explained by interactions between density-dependent competition and changing climate |
title_sort |
marine growth patterns of southern british columbia chum salmon explained by interactions between density-dependent competition and changing climate |
publisher |
Canadian Science Publishing |
publishDate |
2017 |
url |
http://dx.doi.org/10.1139/cjfas-2016-0265 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0265 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0265 |
long_lat |
ENVELOPE(-19.455,-19.455,65.656,65.656) ENVELOPE(-130.143,-130.143,54.160,54.160) |
geographic |
Keta Pacific Sockeye |
geographic_facet |
Keta Pacific Sockeye |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 74, issue 7, page 1077-1087 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2016-0265 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
74 |
container_issue |
7 |
container_start_page |
1077 |
op_container_end_page |
1087 |
_version_ |
1802648743971913728 |