Productivity dynamics of Atlantic cod
Productivity is a central determinant of population dynamics with consequences for population viability, resilience to exploitation, and extinction. In fish, the strength of a cohort is typically established during early life stages. Traditional approaches to measuring productivity do not allow for...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
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crcansciencepubl:10.1139/cjfas-2013-0161 2024-09-15T17:55:24+00:00 Productivity dynamics of Atlantic cod Minto, Cóilín Mills Flemming, Joanna Britten, Gregory Lee Worm, Boris Rose, Kenneth 2014 http://dx.doi.org/10.1139/cjfas-2013-0161 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0161 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0161 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 71, issue 2, page 203-216 ISSN 0706-652X 1205-7533 journal-article 2014 crcansciencepubl https://doi.org/10.1139/cjfas-2013-0161 2024-08-08T04:13:33Z Productivity is a central determinant of population dynamics with consequences for population viability, resilience to exploitation, and extinction. In fish, the strength of a cohort is typically established during early life stages. Traditional approaches to measuring productivity do not allow for interannual variation in the maximum reproductive rate, a parameter governing population productivity. Allowing such process variation provides the ability to track dynamic changes instead of assuming a static productivity regime. Here we develop and evaluate a multivariate stock–recruitment state-space model to simultaneously estimate time-varying stock productivity and synchronicity of dynamics across populations. We apply the method to North Atlantic cod (Gadus morhua) populations, showing that the productivity of early life stages has varied markedly over time, with many populations at historically low productivity. Trends in productivity were similar in some adjacent populations but less regionally coherent than previously thought, particularly in the Northwest Atlantic. Latitudinal variation in the Northeast Atlantic suggests a differential response to environmental change. We conclude that time-varying productivity provides a useful framework that integrates across many dimensions of environmental change affecting early life history dynamics. Article in Journal/Newspaper atlantic cod Gadus morhua North Atlantic Northeast Atlantic Northwest Atlantic Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 71 2 203 216 |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Productivity is a central determinant of population dynamics with consequences for population viability, resilience to exploitation, and extinction. In fish, the strength of a cohort is typically established during early life stages. Traditional approaches to measuring productivity do not allow for interannual variation in the maximum reproductive rate, a parameter governing population productivity. Allowing such process variation provides the ability to track dynamic changes instead of assuming a static productivity regime. Here we develop and evaluate a multivariate stock–recruitment state-space model to simultaneously estimate time-varying stock productivity and synchronicity of dynamics across populations. We apply the method to North Atlantic cod (Gadus morhua) populations, showing that the productivity of early life stages has varied markedly over time, with many populations at historically low productivity. Trends in productivity were similar in some adjacent populations but less regionally coherent than previously thought, particularly in the Northwest Atlantic. Latitudinal variation in the Northeast Atlantic suggests a differential response to environmental change. We conclude that time-varying productivity provides a useful framework that integrates across many dimensions of environmental change affecting early life history dynamics. |
author2 |
Rose, Kenneth |
format |
Article in Journal/Newspaper |
author |
Minto, Cóilín Mills Flemming, Joanna Britten, Gregory Lee Worm, Boris |
spellingShingle |
Minto, Cóilín Mills Flemming, Joanna Britten, Gregory Lee Worm, Boris Productivity dynamics of Atlantic cod |
author_facet |
Minto, Cóilín Mills Flemming, Joanna Britten, Gregory Lee Worm, Boris |
author_sort |
Minto, Cóilín |
title |
Productivity dynamics of Atlantic cod |
title_short |
Productivity dynamics of Atlantic cod |
title_full |
Productivity dynamics of Atlantic cod |
title_fullStr |
Productivity dynamics of Atlantic cod |
title_full_unstemmed |
Productivity dynamics of Atlantic cod |
title_sort |
productivity dynamics of atlantic cod |
publisher |
Canadian Science Publishing |
publishDate |
2014 |
url |
http://dx.doi.org/10.1139/cjfas-2013-0161 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0161 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0161 |
genre |
atlantic cod Gadus morhua North Atlantic Northeast Atlantic Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua North Atlantic Northeast Atlantic Northwest Atlantic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 71, issue 2, page 203-216 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2013-0161 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
71 |
container_issue |
2 |
container_start_page |
203 |
op_container_end_page |
216 |
_version_ |
1810431697948246016 |