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dc.contributor.authorGodiksen, Jane Aanestad
dc.contributor.authorChung, Ming-Tsung
dc.contributor.authorFolkvord, Arild
dc.contributor.authorGrønkjær, Peter
dc.date.accessioned2020-02-07T08:29:28Z
dc.date.available2020-02-07T08:29:28Z
dc.date.created2020-01-28T20:25:44Z
dc.date.issued2019
dc.identifier.citationMarine and Freshwater Research. 2019, 70 (12), 1757-1767.nb_NO
dc.identifier.issn1323-1650
dc.identifier.urihttp://hdl.handle.net/11250/2640157
dc.description.abstractReconstruction of the trophic position of a fish can be performed by analysing stable nitrogen and carbon isotopes in otolith protein. However, ambient temperature may affect the tissue–diet isotopic spacing of stable isotopes from diet to predator tissue and bias estimates of trophic position. To test this, otolith protein, heart and muscle tissue from a rearing experiment with juvenile cod held at different temperatures (4, 7, 10 and 14°C) were analysed. There was no significant effect of temperature on otolith δ15N, whereas muscle and heart exhibited a slight decrease in δ15N values with increasing temperature corresponding to maximum of 0.6‰ over the 10°C range. By contrast, the otolith protein δ13C values at 4 and 7°C were significantly higher than for 10 and 14°C, suggesting an approximate 1‰ increased tissue–diet enrichment at the lower temperatures. Temperature had no significant effect on muscle and heart δ13C values. Considering the annual mean variation in ocean temperatures, our results indicate that the trophic signals recorded in the otoliths will reflect changes in diet isotope values with little bias from the ambient temperature experienced by the fish.nb_NO
dc.language.isoengnb_NO
dc.titleEffects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matternb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber1757-1767nb_NO
dc.source.volume70nb_NO
dc.source.journalMarine and Freshwater Researchnb_NO
dc.source.issue12nb_NO
dc.identifier.doi10.1071/MF19054
dc.identifier.cristin1784650
cristin.unitcode7431,11,0,0
cristin.unitnameBunnfisk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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