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dc.contributor.authorRiseth, Erling
dc.contributor.authorFraser, Thomas
dc.contributor.authorSambraus, Florian
dc.contributor.authorStien, Lars Helge
dc.contributor.authorHvas, Malthe
dc.date.accessioned2021-02-16T09:40:37Z
dc.date.available2021-02-16T09:40:37Z
dc.date.created2020-10-27T12:34:09Z
dc.date.issued2020
dc.identifier.citationJournal of Thermal Biology. 2020, 89 .en_US
dc.identifier.issn0306-4565
dc.identifier.urihttps://hdl.handle.net/11250/2728275
dc.description.abstractMarine organisms living at low temperatures tend to have larger genomes and larger cells which suggest that these traits can be beneficial in colder environments. In fish, triploidy (three complete sets of chromosomes) can be induced experimentally following fertilization, which provides a model system to investigate the hypothesis that larger cells and genomes offers a physiological advantage at low temperatures. We tested this hypothesis by measuring metabolic rates and swimming performance of diploid and triploid Atlantic salmon (Salmo salar) post smolts acclimated to 3 or 10.5 °C. At 10.5 °C, triploids had significantly lower maximum metabolic rates which resulted in a lower aerobic scope compared to diploids. In addition, triploids initiated ram ventilation at lower swimming speeds, providing further evidence of a reduced capacity to meet oxygen demands during strenuous activity at 10.5 °C. However, at 3 °C, metabolic rates and critical swimming speeds were similar between both ploidies, and as expected substantially lower than at 10.5 °C. Therefore, triploidy in colder environments did not provide any advantage over diploidy in terms of metabolic rate traits or swimming performance in Atlantic salmon. We therefore conclude that traits, other than aerobic scope and swimming performance, contribute to the trend for increased cell and genome size in marine ectotherms living in cold environments.en_US
dc.language.isoengen_US
dc.titleIs it advantageous for Atlantic salmon to be triploid at lower temperatures?en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber7en_US
dc.source.volume89en_US
dc.source.journalJournal of Thermal Biologyen_US
dc.identifier.doi10.1016/j.jtherbio.2020.102548
dc.identifier.cristin1842579
dc.relation.projectNorges forskningsråd: 237790en_US
dc.source.articlenumber102548en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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