Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon
Ocean climate impacts on survivorship and growth of Atlantic salmon are complex, but still poorly understood. Stock abundances have declined over the past three decades and 1992-2006 has seen widespread sea surface temperature (SST) warming of the NE Atlantic, including the foraging areas exploited...
Published in: | Global Change Biology |
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Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2008
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/detrimental-effects-of-recent-ocean-surface-warming-on-growth-condition-of-atlantic-salmon(67e24558-295b-4609-8be8-4e05fd18f0e9).html https://doi.org/10.1111/j.1365-2486.2007.01522.x http://www.scopus.com/inward/record.url?scp=42949107483&partnerID=8YFLogxK http://www3.interscience.wiley.com/journal/119416732/abstract |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/67e24558-295b-4609-8be8-4e05fd18f0e9 2023-05-15T15:31:28+02:00 Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon Todd, Christopher David Hughes, S L Marshall, C T MacLean, J C Lonergan, Mike Biuw, Martin 2008-05 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/detrimental-effects-of-recent-ocean-surface-warming-on-growth-condition-of-atlantic-salmon(67e24558-295b-4609-8be8-4e05fd18f0e9).html https://doi.org/10.1111/j.1365-2486.2007.01522.x http://www.scopus.com/inward/record.url?scp=42949107483&partnerID=8YFLogxK http://www3.interscience.wiley.com/journal/119416732/abstract eng eng info:eu-repo/semantics/restrictedAccess Todd , C D , Hughes , S L , Marshall , C T , MacLean , J C , Lonergan , M & Biuw , M 2008 , ' Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon ' , Global Change Biology , vol. 14 , no. 5 , pp. 958-970 . https://doi.org/10.1111/j.1365-2486.2007.01522.x anomaly Atlantic salmon bottom-up control condition factor fecundity lipid reserves NAO ocean warming Salmo salar spawning SST time series ESCAPED FARMED ATLANTIC POST-SMOLT GROWTH NORTH-SEA AREA SALAR L. CLIMATE-CHANGE SURVIVAL BONFERRONI FISHERIES POSTSMOLTS MIGRATION article 2008 ftunstandrewcris https://doi.org/10.1111/j.1365-2486.2007.01522.x 2021-12-26T14:14:25Z Ocean climate impacts on survivorship and growth of Atlantic salmon are complex, but still poorly understood. Stock abundances have declined over the past three decades and 1992-2006 has seen widespread sea surface temperature (SST) warming of the NE Atlantic, including the foraging areas exploited by salmon of southern European origin. Salmon cease feeding on return migration, and here we express the final growth condition of year-classes of one-sea winter adults at, or just before, freshwater re-entry as the predicted weight at standard length. Two independent 14-year time series for a single river stock and for mixed, multiple stocks revealed almost identical temporal patterns in growth condition variation, and an overall trend decrease of 11-14% over the past decade. Growth condition has fallen as SST anomaly has risen, and for each year-class the midwinter (January) SST anomalies they experienced at sea correlated negatively with their final condition on migratory return during the subsequent summer months. Stored lipids are crucial for survival and for the prespawning provisioning of eggs in freshwater, and we show that under-weight individuals have disproportionately low reserves. The poorest condition fish (similar to 30% under-weight) returned with lipid stores reduced by similar to 80%. This study concurs with previous analyses of other North Atlantic top consumers (e.g. somatic condition of tuna, reproductive failure of seabirds) showing evidence of major, recent climate-driven changes in the eastern North Atlantic pelagic ecosystem, and the likely importance of bottom-up control processes. Because salmon abundances presently remain at historical lows, fecundity of recent year-classes will have been increasingly compromised. Measures of year-class growth condition should therefore be incorporated in the analysis and setting of numerical spawning escapements for threatened stocks, and conservation limits should be revised upwards conservatively during periods of excessive ocean climate warming. Article in Journal/Newspaper Atlantic salmon North Atlantic Salmo salar University of St Andrews: Research Portal Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Global Change Biology 14 5 958 970 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
anomaly Atlantic salmon bottom-up control condition factor fecundity lipid reserves NAO ocean warming Salmo salar spawning SST time series ESCAPED FARMED ATLANTIC POST-SMOLT GROWTH NORTH-SEA AREA SALAR L. CLIMATE-CHANGE SURVIVAL BONFERRONI FISHERIES POSTSMOLTS MIGRATION |
spellingShingle |
anomaly Atlantic salmon bottom-up control condition factor fecundity lipid reserves NAO ocean warming Salmo salar spawning SST time series ESCAPED FARMED ATLANTIC POST-SMOLT GROWTH NORTH-SEA AREA SALAR L. CLIMATE-CHANGE SURVIVAL BONFERRONI FISHERIES POSTSMOLTS MIGRATION Todd, Christopher David Hughes, S L Marshall, C T MacLean, J C Lonergan, Mike Biuw, Martin Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon |
topic_facet |
anomaly Atlantic salmon bottom-up control condition factor fecundity lipid reserves NAO ocean warming Salmo salar spawning SST time series ESCAPED FARMED ATLANTIC POST-SMOLT GROWTH NORTH-SEA AREA SALAR L. CLIMATE-CHANGE SURVIVAL BONFERRONI FISHERIES POSTSMOLTS MIGRATION |
description |
Ocean climate impacts on survivorship and growth of Atlantic salmon are complex, but still poorly understood. Stock abundances have declined over the past three decades and 1992-2006 has seen widespread sea surface temperature (SST) warming of the NE Atlantic, including the foraging areas exploited by salmon of southern European origin. Salmon cease feeding on return migration, and here we express the final growth condition of year-classes of one-sea winter adults at, or just before, freshwater re-entry as the predicted weight at standard length. Two independent 14-year time series for a single river stock and for mixed, multiple stocks revealed almost identical temporal patterns in growth condition variation, and an overall trend decrease of 11-14% over the past decade. Growth condition has fallen as SST anomaly has risen, and for each year-class the midwinter (January) SST anomalies they experienced at sea correlated negatively with their final condition on migratory return during the subsequent summer months. Stored lipids are crucial for survival and for the prespawning provisioning of eggs in freshwater, and we show that under-weight individuals have disproportionately low reserves. The poorest condition fish (similar to 30% under-weight) returned with lipid stores reduced by similar to 80%. This study concurs with previous analyses of other North Atlantic top consumers (e.g. somatic condition of tuna, reproductive failure of seabirds) showing evidence of major, recent climate-driven changes in the eastern North Atlantic pelagic ecosystem, and the likely importance of bottom-up control processes. Because salmon abundances presently remain at historical lows, fecundity of recent year-classes will have been increasingly compromised. Measures of year-class growth condition should therefore be incorporated in the analysis and setting of numerical spawning escapements for threatened stocks, and conservation limits should be revised upwards conservatively during periods of excessive ocean climate warming. |
format |
Article in Journal/Newspaper |
author |
Todd, Christopher David Hughes, S L Marshall, C T MacLean, J C Lonergan, Mike Biuw, Martin |
author_facet |
Todd, Christopher David Hughes, S L Marshall, C T MacLean, J C Lonergan, Mike Biuw, Martin |
author_sort |
Todd, Christopher David |
title |
Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon |
title_short |
Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon |
title_full |
Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon |
title_fullStr |
Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon |
title_full_unstemmed |
Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon |
title_sort |
detrimental effects of recent ocean surface warming on growth condition of atlantic salmon |
publishDate |
2008 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/detrimental-effects-of-recent-ocean-surface-warming-on-growth-condition-of-atlantic-salmon(67e24558-295b-4609-8be8-4e05fd18f0e9).html https://doi.org/10.1111/j.1365-2486.2007.01522.x http://www.scopus.com/inward/record.url?scp=42949107483&partnerID=8YFLogxK http://www3.interscience.wiley.com/journal/119416732/abstract |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Midwinter |
geographic_facet |
Midwinter |
genre |
Atlantic salmon North Atlantic Salmo salar |
genre_facet |
Atlantic salmon North Atlantic Salmo salar |
op_source |
Todd , C D , Hughes , S L , Marshall , C T , MacLean , J C , Lonergan , M & Biuw , M 2008 , ' Detrimental effects of recent ocean surface warming on growth condition of Atlantic Salmon ' , Global Change Biology , vol. 14 , no. 5 , pp. 958-970 . https://doi.org/10.1111/j.1365-2486.2007.01522.x |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1365-2486.2007.01522.x |
container_title |
Global Change Biology |
container_volume |
14 |
container_issue |
5 |
container_start_page |
958 |
op_container_end_page |
970 |
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1766361972920549376 |