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...
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ftunivtoronto:oai:localhost:1807/76728 2023-05-15T17:52:52+02:00 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 2016-11-15 http://hdl.handle.net/1807/76728 http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2016-0265 unknown NRC Research Press (a division of Canadian Science Publishing) 0706-652X http://hdl.handle.net/1807/76728 http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2016-0265 Article 2016 ftunivtoronto 2020-06-17T12:03:59Z 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 also affected these competition effects. Density-dependent competition effects increased when NPGO became more positive and Pacific Decadal Oscillation 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. The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon University of Toronto: Research Repository T-Space Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) Keta ENVELOPE(-19.455,-19.455,65.656,65.656) |
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Open Polar |
collection |
University of Toronto: Research Repository T-Space |
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ftunivtoronto |
language |
unknown |
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 also affected these competition effects. Density-dependent competition effects increased when NPGO became more positive and Pacific Decadal Oscillation 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. The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author. |
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 |
NRC Research Press (a division of Canadian Science Publishing) |
publishDate |
2016 |
url |
http://hdl.handle.net/1807/76728 http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2016-0265 |
long_lat |
ENVELOPE(-130.143,-130.143,54.160,54.160) ENVELOPE(-19.455,-19.455,65.656,65.656) |
geographic |
Pacific Sockeye Keta |
geographic_facet |
Pacific Sockeye Keta |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_relation |
0706-652X http://hdl.handle.net/1807/76728 http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2016-0265 |
_version_ |
1766160619736662016 |