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dc.contributor.authorOno, Kotaro
dc.contributor.authorKnutsen, Halvor
dc.contributor.authorOlsen, Esben Moland
dc.contributor.authorRuus, Anders
dc.contributor.authorHjermann, Dag Øystein
dc.contributor.authorStenseth, Nils Christian
dc.date.accessioned2019-11-21T07:27:13Z
dc.date.available2019-11-21T07:27:13Z
dc.date.created2019-09-12T21:08:34Z
dc.date.issued2019
dc.identifier.citationProceedings of the Royal Society of London. Biological Sciences. 2019, 286 (1908), 9.nb_NO
dc.identifier.issn0962-8452
dc.identifier.urihttp://hdl.handle.net/11250/2629612
dc.description.abstractWhile many in-laboratory ecotoxicological studies have shown the adverse impact of pollutants to the fitness of an individual, direct evidence from the field on the population dynamics of wildlife animals has been lacking. Here, we provide empirical support for a negative effect of pollution on Atlantic cod (Gadus morhua) population dynamics in coastal waters of Norway by combining unique time series of juvenile cod abundance, body size, environmental concentration of toxic contaminants and a spatially structured population dynamics model. The study shows that mercury concentration might have decreased the reproductive potential of cod in the region despite the general decline in the environmental concentration of mercury, cadmium and hexachlorobenzene since the implementation of national environmental laws. However, some cod populations appeared to be more resistant to mercury pollution than others, and the strength and shape of mercury effect on cod reproductive potential was fjord-specific. Additionally, cod growth rate changed at scales smaller than fjords with a gradient related to the exposure to the open ocean and offshore cod. These spatial differences in life-history traits emphasize the importance of local adaptation in shaping the dynamics of local wildlife populations. Finally, this study highlights the possibility to mitigate pollution effects on natural populations by reducing the overall pollution level, but also reveals that pollution reduction alone is not enough to rebuild local cod populations. Cod population recovery probably requires complementary efforts on fishing regulation and habitat restoration.nb_NO
dc.language.isoengnb_NO
dc.publisherRoyal Societynb_NO
dc.titlePossible adverse impact of contaminants on Atlantic cod population dynamics in coastal ecosystemsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber9nb_NO
dc.source.volume286nb_NO
dc.source.journalProceedings of the Royal Society of London. Biological Sciencesnb_NO
dc.source.issue1908nb_NO
dc.identifier.doi10.1098/rspb.2019.1167
dc.identifier.cristin1724242
dc.relation.projectNorges forskningsråd: 255675nb_NO
cristin.unitcode7464,20,19,0
cristin.unitcode7464,20,18,0
cristin.unitnameMiljøgifter
cristin.unitnameMiljøinformatikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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