Increased natural mortality at low abundance can generate an Allee effect in a marine fish
Negative density-dependent regulation of population dynamics promotes population growth at low abundance and is therefore vital for recovery following depletion. Inversely, any process that reduces the compensatory density-dependence of population growth can negatively affect recovery. Here, we show...
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ftpubmed:oai:pubmedcentral.nih.gov:4448890 2023-05-15T15:27:29+02:00 Increased natural mortality at low abundance can generate an Allee effect in a marine fish Kuparinen, Anna Hutchings, Jeffrey A. 2014-10-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4448890/ https://doi.org/10.1098/rsos.140075 en eng The Royal Society Publishing http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4448890/ http://dx.doi.org/10.1098/rsos.140075 © 2014 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY Research Articles Text 2014 ftpubmed https://doi.org/10.1098/rsos.140075 2015-06-14T00:05:58Z Negative density-dependent regulation of population dynamics promotes population growth at low abundance and is therefore vital for recovery following depletion. Inversely, any process that reduces the compensatory density-dependence of population growth can negatively affect recovery. Here, we show that increased adult mortality at low abundance can reverse compensatory population dynamics into its opposite—a demographic Allee effect. Northwest Atlantic cod (Gadus morhua) stocks collapsed dramatically in the early 1990s and have since shown little sign of recovery. Many experienced dramatic increases in natural mortality, ostensibly attributable in some populations to increased predation by seals. Our findings show that increased natural mortality of a magnitude observed for overfished cod stocks has been more than sufficient to fundamentally alter the dynamics of density-dependent population regulation. The demographic Allee effect generated by these changes can slow down or even impede the recovery of depleted populations even in the absence of fishing. Text atlantic cod Gadus morhua Northwest Atlantic PubMed Central (PMC) Royal Society Open Science 1 2 140075 |
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Research Articles Kuparinen, Anna Hutchings, Jeffrey A. Increased natural mortality at low abundance can generate an Allee effect in a marine fish |
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Research Articles |
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Negative density-dependent regulation of population dynamics promotes population growth at low abundance and is therefore vital for recovery following depletion. Inversely, any process that reduces the compensatory density-dependence of population growth can negatively affect recovery. Here, we show that increased adult mortality at low abundance can reverse compensatory population dynamics into its opposite—a demographic Allee effect. Northwest Atlantic cod (Gadus morhua) stocks collapsed dramatically in the early 1990s and have since shown little sign of recovery. Many experienced dramatic increases in natural mortality, ostensibly attributable in some populations to increased predation by seals. Our findings show that increased natural mortality of a magnitude observed for overfished cod stocks has been more than sufficient to fundamentally alter the dynamics of density-dependent population regulation. The demographic Allee effect generated by these changes can slow down or even impede the recovery of depleted populations even in the absence of fishing. |
format |
Text |
author |
Kuparinen, Anna Hutchings, Jeffrey A. |
author_facet |
Kuparinen, Anna Hutchings, Jeffrey A. |
author_sort |
Kuparinen, Anna |
title |
Increased natural mortality at low abundance can generate an Allee effect in a marine fish |
title_short |
Increased natural mortality at low abundance can generate an Allee effect in a marine fish |
title_full |
Increased natural mortality at low abundance can generate an Allee effect in a marine fish |
title_fullStr |
Increased natural mortality at low abundance can generate an Allee effect in a marine fish |
title_full_unstemmed |
Increased natural mortality at low abundance can generate an Allee effect in a marine fish |
title_sort |
increased natural mortality at low abundance can generate an allee effect in a marine fish |
publisher |
The Royal Society Publishing |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4448890/ https://doi.org/10.1098/rsos.140075 |
genre |
atlantic cod Gadus morhua Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Northwest Atlantic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4448890/ http://dx.doi.org/10.1098/rsos.140075 |
op_rights |
© 2014 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsos.140075 |
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Royal Society Open Science |
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2 |
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140075 |
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1766357920364101632 |