dc.contributor.author | Carl Jacob, Rørvik | |
dc.contributor.author | Bogstad, Bjarte | |
dc.contributor.author | Ottersen, Geir | |
dc.contributor.author | Kjesbu, Olav Sigurd | |
dc.date.accessioned | 2022-06-21T07:48:54Z | |
dc.date.available | 2022-06-21T07:48:54Z | |
dc.date.created | 2022-03-31T09:28:47Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Canadian Journal of Fisheries and Aquatic Sciences. 2022, 79 (4), 576-586. | en_US |
dc.identifier.issn | 0706-652X | |
dc.identifier.uri | https://hdl.handle.net/11250/2999725 | |
dc.description.abstract | This investigation commenced by constructing principal maturation schedule equations as a function of fishing mortality (F), key biophysical factors and a term attributed to fisheries-induced adaptive change (FIAC). Following the onset of industrial trawl fishery on the model stock, Northeast Arctic cod (NEAC; Gadus morhua) (1934–2020), F on immature age group 5–8 years (F5-8) increased and mean age at 50% maturity (A50) decreased from ≈10 years in the late 1940s to ≈7 years today. Large annual fluctuations in total stock biomass (TSB), sea temperature (KolaT) and F5-8 were used to better understand A50 responses. In the model, the annual accumulation of F5-8 drives FIAC. The model includes the option that NEAC may sustain F5-8 up to a certain level (F_bal) before FIAC becomes statistically evident, with F_bal falling between 0.00 and 0.40 for A50. This dynamic range in F_bal indicates a sophisticated, underlying adaptive response. Independent of F_bal, our analysis clarifies that FIAC is necessary to explain the observed changes in A50. | en_US |
dc.language.iso | eng | en_US |
dc.title | Long-term interplay between harvest regimes and biophysical conditions may lead to persistent changes in age at sexual maturity of Northeast Arctic cod (Gadus morhua) | en_US |
dc.title.alternative | Long-term interplay between harvest regimes and biophysical conditions may lead to persistent changes in age at sexual maturity of Northeast Arctic cod (Gadus morhua) | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.pagenumber | 576-586 | en_US |
dc.source.volume | 79 | en_US |
dc.source.journal | Canadian Journal of Fisheries and Aquatic Sciences | en_US |
dc.source.issue | 4 | en_US |
dc.identifier.doi | 10.1139/cjfas-2021-0068 | |
dc.identifier.cristin | 2014018 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |