Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks
We used a comparative approach investigating commercially fished species with contrasting life histories and trophic positions in an Arcto-boreal system, the Barents Sea. Our objective was to address the ecological consequences of harvesting on stock properties (stochastic growth rate; a property re...
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Online Access: | http://hdl.handle.net/11250/2491994 https://doi.org/10.3354/meps12210 |
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ftnorskinstvf:oai:niva.brage.unit.no:11250/2491994 2023-05-15T15:39:02+02:00 Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks Durant, Joel Marcel Hjermann, Dag Øystein 2017 application/pdf http://hdl.handle.net/11250/2491994 https://doi.org/10.3354/meps12210 eng eng Inter Research Norges forskningsråd: 179569 Norges forskningsråd: 244647 EU/675997 Marine Ecology Progress Series. 2017, 577, 177-188. urn:issn:0171-8630 http://hdl.handle.net/11250/2491994 https://doi.org/10.3354/meps12210 cristin:1488065 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The authors 2017 CC-BY 177-188 577 Marine Ecology Progress Series Journal article Peer reviewed 2017 ftnorskinstvf https://doi.org/10.3354/meps12210 2023-02-21T08:46:17Z We used a comparative approach investigating commercially fished species with contrasting life histories and trophic positions in an Arcto-boreal system, the Barents Sea. Our objective was to address the ecological consequences of harvesting on stock properties (stochastic growth rate; a property related to intrinsic growth rate) in relation to different external conditions (fishing pressure and climate). We used age-structured population matrices to calculate the transient elasticity of population growth with respect to recruitment (how much population growth depends on recruitment) over time. Using a generalized additive model (GAM) analysis, we found that the transient elasticity of population growth to recruitment overall depends mostly on age structure (which in turn is affected by fishing) but also on climate (temperature change or winter North Atlantic Oscillation). Our results indicate that under warmer conditions, population growth of high latitude stocks becomes increasingly dependent on recruitment, which makes the stocks more difficult to manage. In general, there was no effect of ongoing fishing pressure on elasticity after age structure had been taken into account, supporting the view that long-term fishing pressure affects the susceptibility of the population to climate indirectly, by changing the age structure of the stock. However, for most of the stocks we have studied here, populations have low elasticity to recruitment due to their life history, meaning that the health of the stock mainly depends on survival after the recruitment stage; i.e. fisheries management is more important than climate. publishedVersion Article in Journal/Newspaper Barents Sea North Atlantic North Atlantic oscillation Norwegian Institute for Water research: NIVA Open Access Archive (Brage) Barents Sea Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Marine Ecology Progress Series 577 177 188 |
institution |
Open Polar |
collection |
Norwegian Institute for Water research: NIVA Open Access Archive (Brage) |
op_collection_id |
ftnorskinstvf |
language |
English |
description |
We used a comparative approach investigating commercially fished species with contrasting life histories and trophic positions in an Arcto-boreal system, the Barents Sea. Our objective was to address the ecological consequences of harvesting on stock properties (stochastic growth rate; a property related to intrinsic growth rate) in relation to different external conditions (fishing pressure and climate). We used age-structured population matrices to calculate the transient elasticity of population growth with respect to recruitment (how much population growth depends on recruitment) over time. Using a generalized additive model (GAM) analysis, we found that the transient elasticity of population growth to recruitment overall depends mostly on age structure (which in turn is affected by fishing) but also on climate (temperature change or winter North Atlantic Oscillation). Our results indicate that under warmer conditions, population growth of high latitude stocks becomes increasingly dependent on recruitment, which makes the stocks more difficult to manage. In general, there was no effect of ongoing fishing pressure on elasticity after age structure had been taken into account, supporting the view that long-term fishing pressure affects the susceptibility of the population to climate indirectly, by changing the age structure of the stock. However, for most of the stocks we have studied here, populations have low elasticity to recruitment due to their life history, meaning that the health of the stock mainly depends on survival after the recruitment stage; i.e. fisheries management is more important than climate. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Durant, Joel Marcel Hjermann, Dag Øystein |
spellingShingle |
Durant, Joel Marcel Hjermann, Dag Øystein Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks |
author_facet |
Durant, Joel Marcel Hjermann, Dag Øystein |
author_sort |
Durant, Joel Marcel |
title |
Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks |
title_short |
Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks |
title_full |
Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks |
title_fullStr |
Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks |
title_full_unstemmed |
Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks |
title_sort |
age-structure, harvesting and climate effects on population growth of arcto-boreal fish stocks |
publisher |
Inter Research |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2491994 https://doi.org/10.3354/meps12210 |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Barents Sea Gam |
geographic_facet |
Barents Sea Gam |
genre |
Barents Sea North Atlantic North Atlantic oscillation |
genre_facet |
Barents Sea North Atlantic North Atlantic oscillation |
op_source |
177-188 577 Marine Ecology Progress Series |
op_relation |
Norges forskningsråd: 179569 Norges forskningsråd: 244647 EU/675997 Marine Ecology Progress Series. 2017, 577, 177-188. urn:issn:0171-8630 http://hdl.handle.net/11250/2491994 https://doi.org/10.3354/meps12210 cristin:1488065 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The authors 2017 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3354/meps12210 |
container_title |
Marine Ecology Progress Series |
container_volume |
577 |
container_start_page |
177 |
op_container_end_page |
188 |
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1766370487901880320 |