Increased natural mortality at low abundance can generate a demographic Allee effect
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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ftoslouniv:oai:www.duo.uio.no:10852/56807 2023-05-15T15:27:27+02:00 Increased natural mortality at low abundance can generate a demographic Allee effect Kauparinen, Anna Hutchings, Jeffrey 2015-02-09T10:03:55Z http://hdl.handle.net/10852/56807 http://urn.nb.no/URN:NBN:no-59551 https://doi.org/10.1098/rsos.140075 EN eng The Royal Society http://urn.nb.no/URN:NBN:no-59551 Kauparinen, Anna Hutchings, Jeffrey . Increased natural mortality at low abundance can generate a demographic Allee effect. Royal Society Open Science. 2014, 1(2) http://hdl.handle.net/10852/56807 1218790 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Royal Society Open Science&rft.volume=1&rft.spage=&rft.date=2014 Royal Society Open Science 1 2 5 http://dx.doi.org/10.1098/rsos.140075 URN:NBN:no-59551 Fulltext https://www.duo.uio.no/bitstream/handle/10852/56807/2/140075.full.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 2054-5703 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2015 ftoslouniv https://doi.org/10.1098/rsos.140075 2020-06-21T08:50:56Z 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 Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Royal Society Open Science 1 2 140075 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
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 |
Kauparinen, Anna Hutchings, Jeffrey |
spellingShingle |
Kauparinen, Anna Hutchings, Jeffrey Increased natural mortality at low abundance can generate a demographic Allee effect |
author_facet |
Kauparinen, Anna Hutchings, Jeffrey |
author_sort |
Kauparinen, Anna |
title |
Increased natural mortality at low abundance can generate a demographic Allee effect |
title_short |
Increased natural mortality at low abundance can generate a demographic Allee effect |
title_full |
Increased natural mortality at low abundance can generate a demographic Allee effect |
title_fullStr |
Increased natural mortality at low abundance can generate a demographic Allee effect |
title_full_unstemmed |
Increased natural mortality at low abundance can generate a demographic Allee effect |
title_sort |
increased natural mortality at low abundance can generate a demographic allee effect |
publisher |
The Royal Society |
publishDate |
2015 |
url |
http://hdl.handle.net/10852/56807 http://urn.nb.no/URN:NBN:no-59551 https://doi.org/10.1098/rsos.140075 |
genre |
atlantic cod Gadus morhua Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Northwest Atlantic |
op_source |
2054-5703 |
op_relation |
http://urn.nb.no/URN:NBN:no-59551 Kauparinen, Anna Hutchings, Jeffrey . Increased natural mortality at low abundance can generate a demographic Allee effect. Royal Society Open Science. 2014, 1(2) http://hdl.handle.net/10852/56807 1218790 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Royal Society Open Science&rft.volume=1&rft.spage=&rft.date=2014 Royal Society Open Science 1 2 5 http://dx.doi.org/10.1098/rsos.140075 URN:NBN:no-59551 Fulltext https://www.duo.uio.no/bitstream/handle/10852/56807/2/140075.full.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsos.140075 |
container_title |
Royal Society Open Science |
container_volume |
1 |
container_issue |
2 |
container_start_page |
140075 |
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1766357887165136896 |