Population growth across heterogeneous environments: effects of harvesting and age structure

Population growth is affected by several factors such as climate, species interaction and harvesting pressure. However, additional complexity can arise if fishing increases the sensitivity to environmental variability. To predict the effects of fisheries and climate on marine populations, there is a...

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Authors: Durant, J.M., Hidalgo, Manuel, Rouyer, T.A., Hjermann, D.Ø., Ciannelli, Lorenzo, Eikeset, Anne Maria, Yaragina, Natalia, Stenseth, Nils Christian
Format: article
Publication Date:2013
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/323814
Online Access:http://hdl.handle.net/10261/323814
Access Level:Open access
Keyword:Barents Sea
Pesquerías
Centro Oceanográfico de Baleares
Mediterranean Sea
Bering Sea
Cod
Gadus morhua
European hake
Merluccius merluccius
Pollock
Theragra chalcogramma
Leslie matrix
Fisheries
id ES_8fbfe525fefd2a7d142b78f9ca588d1d
oai_identifier_str oai:digital.csic.es:10261/323814
network_acronym_str ES
network_name_str España
repository_id_str
spelling Population growth across heterogeneous environments: effects of harvesting and age structureDurant, J.M.Hidalgo, ManuelRouyer, T.A.Hjermann, D.Ø.Ciannelli, LorenzoEikeset, Anne MariaYaragina, NataliaStenseth, Nils ChristianBarents SeaPesqueríasCentro Oceanográfico de BalearesMediterranean SeaBering SeaCodGadus morhuaEuropean hakeMerluccius merlucciusPollockTheragra chalcogrammaLeslie matrixFisheriesPopulation growth is affected by several factors such as climate, species interaction and harvesting pressure. However, additional complexity can arise if fishing increases the sensitivity to environmental variability. To predict the effects of fisheries and climate on marine populations, there is a need for improved understanding of how they affect key ecological processes such as population growth. In this study, we used a comparative approach investigating commercially fished species across different ecosystems: the Norwegian Sea−Barents Sea (Northeast Arctic cod), the North Sea (North Sea cod), the Atlantic Ocean (European hake), the Mediterranean Sea (European hake), and the Gulf of Alaska and Bering Sea (walleye pollock). Our objective was to compare the effects of commercial fisheries, age structure and environmental variability on population growth rate. We show that although all stocks experienced a decline in abundance, only 3 of them showed a concomitant decreasing trend in generation time (South Atlantic hake, North Atlantic hake and Northeast Arctic cod), suggesting a fishing-induced erosion in their age structure. Intra-specific analysis shows that changes in generation time triggered an increase in the relative contribution of recruitment to population growth. Furthermore, the contribution from recruitment to population growth changes due to large-scale climate indices or regional-scale environmental covariates, such as sea temperature. This study illustrates how and where the interaction between large-scale ecological patterns and regional/short-scale processes are important for designing management regulationsSí202320232013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/323814reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésInglésCentro Oceanográfico de Baleareshttp://www.int-res.com/abstracts/meps/v480/p277-287/info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3238142026-05-22T06:33:51Z
dc.title.none.fl_str_mv Population growth across heterogeneous environments: effects of harvesting and age structure
title Population growth across heterogeneous environments: effects of harvesting and age structure
spellingShingle Population growth across heterogeneous environments: effects of harvesting and age structure
Durant, J.M.
Barents Sea
Pesquerías
Centro Oceanográfico de Baleares
Mediterranean Sea
Bering Sea
Cod
Gadus morhua
European hake
Merluccius merluccius
Pollock
Theragra chalcogramma
Leslie matrix
Fisheries
title_short Population growth across heterogeneous environments: effects of harvesting and age structure
title_full Population growth across heterogeneous environments: effects of harvesting and age structure
title_fullStr Population growth across heterogeneous environments: effects of harvesting and age structure
title_full_unstemmed Population growth across heterogeneous environments: effects of harvesting and age structure
title_sort Population growth across heterogeneous environments: effects of harvesting and age structure
dc.creator.none.fl_str_mv Durant, J.M.
Hidalgo, Manuel
Rouyer, T.A.
Hjermann, D.Ø.
Ciannelli, Lorenzo
Eikeset, Anne Maria
Yaragina, Natalia
Stenseth, Nils Christian
author Durant, J.M.
author_facet Durant, J.M.
Hidalgo, Manuel
Rouyer, T.A.
Hjermann, D.Ø.
Ciannelli, Lorenzo
Eikeset, Anne Maria
Yaragina, Natalia
Stenseth, Nils Christian
author_role author
author2 Hidalgo, Manuel
Rouyer, T.A.
Hjermann, D.Ø.
Ciannelli, Lorenzo
Eikeset, Anne Maria
Yaragina, Natalia
Stenseth, Nils Christian
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Barents Sea
Pesquerías
Centro Oceanográfico de Baleares
Mediterranean Sea
Bering Sea
Cod
Gadus morhua
European hake
Merluccius merluccius
Pollock
Theragra chalcogramma
Leslie matrix
Fisheries
topic Barents Sea
Pesquerías
Centro Oceanográfico de Baleares
Mediterranean Sea
Bering Sea
Cod
Gadus morhua
European hake
Merluccius merluccius
Pollock
Theragra chalcogramma
Leslie matrix
Fisheries
description Population growth is affected by several factors such as climate, species interaction and harvesting pressure. However, additional complexity can arise if fishing increases the sensitivity to environmental variability. To predict the effects of fisheries and climate on marine populations, there is a need for improved understanding of how they affect key ecological processes such as population growth. In this study, we used a comparative approach investigating commercially fished species across different ecosystems: the Norwegian Sea−Barents Sea (Northeast Arctic cod), the North Sea (North Sea cod), the Atlantic Ocean (European hake), the Mediterranean Sea (European hake), and the Gulf of Alaska and Bering Sea (walleye pollock). Our objective was to compare the effects of commercial fisheries, age structure and environmental variability on population growth rate. We show that although all stocks experienced a decline in abundance, only 3 of them showed a concomitant decreasing trend in generation time (South Atlantic hake, North Atlantic hake and Northeast Arctic cod), suggesting a fishing-induced erosion in their age structure. Intra-specific analysis shows that changes in generation time triggered an increase in the relative contribution of recruitment to population growth. Furthermore, the contribution from recruitment to population growth changes due to large-scale climate indices or regional-scale environmental covariates, such as sea temperature. This study illustrates how and where the interaction between large-scale ecological patterns and regional/short-scale processes are important for designing management regulations
publishDate 2013
dc.date.none.fl_str_mv 2013
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/323814
url http://hdl.handle.net/10261/323814
dc.language.none.fl_str_mv Inglés
Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Baleares
http://www.int-res.com/abstracts/meps/v480/p277-287/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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