Impact of naturally spawning captive-bred Atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction
The assessment report of the 4th International Panel on Climate Change confirms that global warming is strongly affecting biological systems and that 20–30% of species risk extinction from projected future increases in temperature. It is essential that any measures taken to conserve individual speci...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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Online Access: | http://dx.doi.org/10.1098/rspb.2009.0799 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2009.0799 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2009.0799 |
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crroyalsociety:10.1098/rspb.2009.0799 2024-09-15T17:56:19+00:00 Impact of naturally spawning captive-bred Atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction McGinnity, Philip Jennings, Eleanor deEyto, Elvira Allott, Norman Samuelsson, Patrick Rogan, Gerard Whelan, Ken Cross, Tom 2009 http://dx.doi.org/10.1098/rspb.2009.0799 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2009.0799 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2009.0799 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 276, issue 1673, page 3601-3610 ISSN 0962-8452 1471-2954 journal-article 2009 crroyalsociety https://doi.org/10.1098/rspb.2009.0799 2024-08-26T04:20:55Z The assessment report of the 4th International Panel on Climate Change confirms that global warming is strongly affecting biological systems and that 20–30% of species risk extinction from projected future increases in temperature. It is essential that any measures taken to conserve individual species and their constituent populations against climate-mediated declines are appropriate. The release of captive bred animals to augment wild populations is a widespread management strategy for many species but has proven controversial. Using a regression model based on a 37-year study of wild and sea ranched Atlantic salmon ( Salmo salar ) spawning together in the wild, we show that the escape of captive bred animals into the wild can substantially depress recruitment and more specifically disrupt the capacity of natural populations to adapt to higher winter water temperatures associated with climate variability. We speculate the mechanisms underlying this seasonal response and suggest that an explanation based on bio-energetic processes with physiological responses synchronized by photoperiod is plausible. Furthermore, we predict, by running the model forward using projected future climate scenarios, that these cultured fish substantially increase the risk of extinction for the studied population within 20 generations. In contrast, we show that positive outcomes to climate change are possible if captive bred animals are prevented from breeding in the wild. Rather than imposing an additional genetic load on wild populations by releasing maladapted captive bred animals, we propose that conservation efforts should focus on optimizing conditions for adaptation to occur by reducing exploitation and protecting critical habitats. Our findings are likely to hold true for most poikilothermic species where captive breeding programmes are used in population management. Article in Journal/Newspaper Atlantic salmon Salmo salar The Royal Society Proceedings of the Royal Society B: Biological Sciences 276 1673 3601 3610 |
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The Royal Society |
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crroyalsociety |
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English |
description |
The assessment report of the 4th International Panel on Climate Change confirms that global warming is strongly affecting biological systems and that 20–30% of species risk extinction from projected future increases in temperature. It is essential that any measures taken to conserve individual species and their constituent populations against climate-mediated declines are appropriate. The release of captive bred animals to augment wild populations is a widespread management strategy for many species but has proven controversial. Using a regression model based on a 37-year study of wild and sea ranched Atlantic salmon ( Salmo salar ) spawning together in the wild, we show that the escape of captive bred animals into the wild can substantially depress recruitment and more specifically disrupt the capacity of natural populations to adapt to higher winter water temperatures associated with climate variability. We speculate the mechanisms underlying this seasonal response and suggest that an explanation based on bio-energetic processes with physiological responses synchronized by photoperiod is plausible. Furthermore, we predict, by running the model forward using projected future climate scenarios, that these cultured fish substantially increase the risk of extinction for the studied population within 20 generations. In contrast, we show that positive outcomes to climate change are possible if captive bred animals are prevented from breeding in the wild. Rather than imposing an additional genetic load on wild populations by releasing maladapted captive bred animals, we propose that conservation efforts should focus on optimizing conditions for adaptation to occur by reducing exploitation and protecting critical habitats. Our findings are likely to hold true for most poikilothermic species where captive breeding programmes are used in population management. |
format |
Article in Journal/Newspaper |
author |
McGinnity, Philip Jennings, Eleanor deEyto, Elvira Allott, Norman Samuelsson, Patrick Rogan, Gerard Whelan, Ken Cross, Tom |
spellingShingle |
McGinnity, Philip Jennings, Eleanor deEyto, Elvira Allott, Norman Samuelsson, Patrick Rogan, Gerard Whelan, Ken Cross, Tom Impact of naturally spawning captive-bred Atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction |
author_facet |
McGinnity, Philip Jennings, Eleanor deEyto, Elvira Allott, Norman Samuelsson, Patrick Rogan, Gerard Whelan, Ken Cross, Tom |
author_sort |
McGinnity, Philip |
title |
Impact of naturally spawning captive-bred Atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction |
title_short |
Impact of naturally spawning captive-bred Atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction |
title_full |
Impact of naturally spawning captive-bred Atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction |
title_fullStr |
Impact of naturally spawning captive-bred Atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction |
title_full_unstemmed |
Impact of naturally spawning captive-bred Atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction |
title_sort |
impact of naturally spawning captive-bred atlantic salmon on wild populations: depressed recruitment and increased risk of climate-mediated extinction |
publisher |
The Royal Society |
publishDate |
2009 |
url |
http://dx.doi.org/10.1098/rspb.2009.0799 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2009.0799 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2009.0799 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 276, issue 1673, page 3601-3610 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2009.0799 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
276 |
container_issue |
1673 |
container_start_page |
3601 |
op_container_end_page |
3610 |
_version_ |
1810432526889517056 |