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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ftoslouniv:oai:www.duo.uio.no:10852/57452 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 2017-08-23T09:34:06Z http://hdl.handle.net/10852/57452 http://urn.nb.no/URN:NBN:no-60183 https://doi.org/10.3354/meps12210 EN eng http://urn.nb.no/URN:NBN:no-60183 Durant, Joel Marcel Hjermann, Dag Øystein . Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks. Marine Ecology Progress Series. 2017, 577, 177-188 http://hdl.handle.net/10852/57452 1488065 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Marine Ecology Progress Series&rft.volume=577&rft.spage=177&rft.date=2017 Marine Ecology Progress Series 577 177 188 http://dx.doi.org/10.3354/meps12210 URN:NBN:no-60183 Fulltext https://www.duo.uio.no/bitstream/handle/10852/57452/2/Durant%2BHjermann%2B%2528MEPS%2B2017%2529.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 0171-8630 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2017 ftoslouniv https://doi.org/10.3354/meps12210 2020-06-21T08:50:59Z 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. Article in Journal/Newspaper Barents Sea North Atlantic North Atlantic oscillation Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Barents Sea Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Marine Ecology Progress Series 577 177 188 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
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. |
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 |
publishDate |
2017 |
url |
http://hdl.handle.net/10852/57452 http://urn.nb.no/URN:NBN:no-60183 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 |
0171-8630 |
op_relation |
http://urn.nb.no/URN:NBN:no-60183 Durant, Joel Marcel Hjermann, Dag Øystein . Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks. Marine Ecology Progress Series. 2017, 577, 177-188 http://hdl.handle.net/10852/57452 1488065 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Marine Ecology Progress Series&rft.volume=577&rft.spage=177&rft.date=2017 Marine Ecology Progress Series 577 177 188 http://dx.doi.org/10.3354/meps12210 URN:NBN:no-60183 Fulltext https://www.duo.uio.no/bitstream/handle/10852/57452/2/Durant%2BHjermann%2B%2528MEPS%2B2017%2529.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
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 |
_version_ |
1766370488434556928 |