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dc.contributor.authorSmalås, Aslak
dc.contributor.authorStrøm, John Fredrik
dc.contributor.authorAmundsen, Per-Arne
dc.contributor.authorDieckmann, Ulf
dc.contributor.authorPrimicerio, Raul
dc.date.accessioned2019-12-30T13:42:17Z
dc.date.available2019-12-30T13:42:17Z
dc.date.issued2019-11-05
dc.description.abstract<ol> <li>Ecosystems at high latitudes are exposed to some of the highest rates of climate warming on earth, and freshwater ecosystems in those regions are already experiencing extended ice‐free seasons and warmer waters. The dominant fish species in these ecosystems are cold‐water salmonids, which play a central ecological role in lake ecosystems, where they are often exposed to size‐selective fisheries that truncate their size and age distributions, making them potentially vulnerable to exploitation and environmental perturbations.</li> <li>Here, we address the combined effects of climate‐induced water temperature increase (using regionally downscaled climate models based on the RCP‐4.5 and RCP‐8.5 climate scenarios together with an air‐to‐water temperature model) and gillnet harvesting, over the period from 1950 to 2100, on the somatic growth, demography and vulnerability of Arctic charr <i>Salvelinus alpinus</i> (L.), using an eco‐genetic individual‐based model. The model captures successive annual life‐history events, including the key processes of size‐dependent mortality, age‐ and size‐dependent maturation described by a probabilistic reaction norm, temperature‐dependent growth, size‐dependent reproduction and density‐dependent recruitment.</li> <li>Our model predicts that higher water temperatures will increase the somatic growth of Arctic charr, leading to larger body size at age and increased stock biomass: for RCP‐8.5, we predict an 80% increase in stock biomass in the year 2100 relative to the year 2000 in the absence of fishing. Interestingly, this potential increase in biomass in future climate scenarios will be partially masked by harvesting: for a fishing mortality of 0.3 year<sup>−1</sup>, we predict a mere 40% increase in stock biomass in 2100 relative to 2000. Despite the predicted increase in stock biomass, yield will increase substantially only when fishing mortality is low. In addition, climate warming will accentuate the age‐truncation effect of harvesting, which will target younger individuals, including immatures, thus elevating the vulnerability of the population to environmental perturbations.</li> <li><i>Synthesis and applications</i>. Our model‐based analyses highlight the combined effects of climate change and size‐selective fishing, emphasizing the emerging vulnerability of fish populations to multiple stressors. We recommend carefully climate‐adapted management strategies permitting only a narrow range of gillnet mesh sizes for inland fisheries at high latitudes.</li> </ol>en_US
dc.identifier.citationSmalås A, Strøm JF, Amundsen P-A, Dieckmann U, Primicerio R. Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish. Journal of Applied Ecology. 2019en_US
dc.identifier.cristinIDFRIDAID 1759838
dc.identifier.doihttps://doi.org/10.1111/1365-2664.13535
dc.identifier.issn0021-8901
dc.identifier.issn1365-2664
dc.identifier.urihttps://hdl.handle.net/10037/16997
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalJournal of Applied Ecology
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/677039/EU/Co-creating a decision support framework to ensure sustainable fish production in Europe under climate change/ClimeFish/en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/820989/EU/Our common future ocean in the Earth system – quantifying coupled cycles of carbon, oxygen, and nutrients for determining and achieving safe operating spaces with respect to tipping points/COMFORT/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.rightsAttribution 4.0 International*
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488en_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921en_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Ressursbiologi: 921en_US
dc.titleClimate warming is predicted to enhance the negative effects of size-selective harvesting on lake fishen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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