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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ftdoajarticles:oai:doaj.org/article:fc7a09678ffe4c0aa5c35e35f386a286 2023-05-15T15:27:06+02:00 Increased natural mortality at low abundance can generate an Allee effect in a marine fish Anna Kuparinen Jeffrey A. Hutchings 2014-01-01T00:00:00Z https://doi.org/10.1098/rsos.140075 https://doaj.org/article/fc7a09678ffe4c0aa5c35e35f386a286 EN eng The Royal Society https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.140075 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.140075 https://doaj.org/article/fc7a09678ffe4c0aa5c35e35f386a286 Royal Society Open Science, Vol 1, Iss 2 (2014) atlantic cod density-dependence fisheries overfishing population growth rate recovery Science Q article 2014 ftdoajarticles https://doi.org/10.1098/rsos.140075 2022-12-31T05:07:18Z 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. Article in Journal/Newspaper atlantic cod Gadus morhua Northwest Atlantic Directory of Open Access Journals: DOAJ Articles Royal Society Open Science 1 2 140075 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
atlantic cod density-dependence fisheries overfishing population growth rate recovery Science Q |
spellingShingle |
atlantic cod density-dependence fisheries overfishing population growth rate recovery Science Q Anna Kuparinen Jeffrey A. Hutchings Increased natural mortality at low abundance can generate an Allee effect in a marine fish |
topic_facet |
atlantic cod density-dependence fisheries overfishing population growth rate recovery Science Q |
description |
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 |
Article in Journal/Newspaper |
author |
Anna Kuparinen Jeffrey A. Hutchings |
author_facet |
Anna Kuparinen Jeffrey A. Hutchings |
author_sort |
Anna Kuparinen |
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 |
publishDate |
2014 |
url |
https://doi.org/10.1098/rsos.140075 https://doaj.org/article/fc7a09678ffe4c0aa5c35e35f386a286 |
genre |
atlantic cod Gadus morhua Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Northwest Atlantic |
op_source |
Royal Society Open Science, Vol 1, Iss 2 (2014) |
op_relation |
https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.140075 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.140075 https://doaj.org/article/fc7a09678ffe4c0aa5c35e35f386a286 |
op_doi |
https://doi.org/10.1098/rsos.140075 |
container_title |
Royal Society Open Science |
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1 |
container_issue |
2 |
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140075 |
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1766357556000718848 |