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dc.date.accessioned2017-08-24T14:00:16Z
dc.date.available2017-08-24T14:00:16Z
dc.date.created2017-08-23T09:34:06Z
dc.date.issued2017
dc.identifier.citationDurant, 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
dc.identifier.urihttp://hdl.handle.net/10852/57452
dc.description.abstractWe 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.en_US
dc.languageEN
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleAge-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocksen_US
dc.typeJournal articleen_US
dc.creator.authorDurant, Joel Marcel
dc.creator.authorHjermann, Dag Øystein
cristin.unitcode185,15,29,50
cristin.unitnameCentre for Ecological and Evolutionary Synthesis
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.cristin1488065
dc.identifier.bibliographiccitationinfo: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
dc.identifier.jtitleMarine Ecology Progress Series
dc.identifier.volume577
dc.identifier.startpage177
dc.identifier.endpage188
dc.identifier.doihttp://dx.doi.org/10.3354/meps12210
dc.identifier.urnURN:NBN:no-60183
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn0171-8630
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/57452/2/Durant%2BHjermann%2B%2528MEPS%2B2017%2529.pdf
dc.type.versionPublishedVersion


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