Evolutionary response to size-selective mortality in an exploited fish population
Many collapsed fish populations have failed to recover after a decade or more with little fishing. This may reflect evolutionary change in response to the highly selective mortality imposed by fisheries. Recent experimental work has demonstrated a rapid genetic change in growth rate in response to s...
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ftpubmed:oai:pubmedcentral.nih.gov:2124474 2023-05-15T15:27:34+02:00 Evolutionary response to size-selective mortality in an exploited fish population Swain, Douglas P Sinclair, Alan F Mark Hanson, J 2007-01-30 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2124474 http://www.ncbi.nlm.nih.gov/pubmed/17264058 https://doi.org/10.1098/rspb.2006.0275 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2124474 http://www.ncbi.nlm.nih.gov/pubmed/17264058 http://dx.doi.org/10.1098/rspb.2006.0275 © 2007 The Royal Society Research Article Text 2007 ftpubmed https://doi.org/10.1098/rspb.2006.0275 2013-09-01T09:29:32Z Many collapsed fish populations have failed to recover after a decade or more with little fishing. This may reflect evolutionary change in response to the highly selective mortality imposed by fisheries. Recent experimental work has demonstrated a rapid genetic change in growth rate in response to size-selective harvesting of laboratory fish populations. Here, we use a 30-year time-series of back-calculated lengths-at-age to test for a genetic response to size-selective mortality in the wild in a heavily exploited population of Atlantic cod (Gadus morhua). Controlling for the effects of density- and temperature-dependent growth, the change in mean length of 4-year-old cod between offspring and their parental cohorts was positively correlated with the estimated selection differential experienced by the parental cohorts between this age and spawning. This result supports the hypothesis that there have been genetic changes in growth in this population in response to size-selective fishing. Such changes may account for the continued small size-at-age in this population despite good conditions for growth and little fishing for over a decade. This study highlights the need for management regimes that take into account the evolutionary consequences of fishing. Text atlantic cod Gadus morhua PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 274 1613 1015 1022 |
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Research Article Swain, Douglas P Sinclair, Alan F Mark Hanson, J Evolutionary response to size-selective mortality in an exploited fish population |
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Research Article |
description |
Many collapsed fish populations have failed to recover after a decade or more with little fishing. This may reflect evolutionary change in response to the highly selective mortality imposed by fisheries. Recent experimental work has demonstrated a rapid genetic change in growth rate in response to size-selective harvesting of laboratory fish populations. Here, we use a 30-year time-series of back-calculated lengths-at-age to test for a genetic response to size-selective mortality in the wild in a heavily exploited population of Atlantic cod (Gadus morhua). Controlling for the effects of density- and temperature-dependent growth, the change in mean length of 4-year-old cod between offspring and their parental cohorts was positively correlated with the estimated selection differential experienced by the parental cohorts between this age and spawning. This result supports the hypothesis that there have been genetic changes in growth in this population in response to size-selective fishing. Such changes may account for the continued small size-at-age in this population despite good conditions for growth and little fishing for over a decade. This study highlights the need for management regimes that take into account the evolutionary consequences of fishing. |
format |
Text |
author |
Swain, Douglas P Sinclair, Alan F Mark Hanson, J |
author_facet |
Swain, Douglas P Sinclair, Alan F Mark Hanson, J |
author_sort |
Swain, Douglas P |
title |
Evolutionary response to size-selective mortality in an exploited fish population |
title_short |
Evolutionary response to size-selective mortality in an exploited fish population |
title_full |
Evolutionary response to size-selective mortality in an exploited fish population |
title_fullStr |
Evolutionary response to size-selective mortality in an exploited fish population |
title_full_unstemmed |
Evolutionary response to size-selective mortality in an exploited fish population |
title_sort |
evolutionary response to size-selective mortality in an exploited fish population |
publisher |
The Royal Society |
publishDate |
2007 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2124474 http://www.ncbi.nlm.nih.gov/pubmed/17264058 https://doi.org/10.1098/rspb.2006.0275 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2124474 http://www.ncbi.nlm.nih.gov/pubmed/17264058 http://dx.doi.org/10.1098/rspb.2006.0275 |
op_rights |
© 2007 The Royal Society |
op_doi |
https://doi.org/10.1098/rspb.2006.0275 |
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Proceedings of the Royal Society B: Biological Sciences |
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274 |
container_issue |
1613 |
container_start_page |
1015 |
op_container_end_page |
1022 |
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1766357983826018304 |