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dc.contributor.authorFevolden, Svein-Erik
dc.contributor.authorWestgaard, Jon-Ivar
dc.contributor.authorPedersen, Torstein
dc.contributor.authorPræbel, Kim
dc.date.accessioned2013-10-23T12:14:36Z
dc.date.available2013-10-23T12:14:36Z
dc.date.issued2012-11-14
dc.identifier.citationFevolden SE, Westgaard JI, Pedersen T, Præbel K (2012) Settling-depth vs. genotype and size vs. genotype correlations at the Pan I locus in 0-group Atlantic cod Gadus morhua . Mar Ecol Prog Ser 468:267-278no_NO
dc.identifier.issn0171-8630
dc.identifier.issn1616-1599
dc.identifier.urihttp://hdl.handle.net/11250/109216
dc.description.abstractWe sampled 0-group juvenile Atlantic cod Gadus morhua L. within fjords and offshore in northern Norway from 1994 to 2008 using different gears for the 3 sampling depths: shore seine (0−3 m), pelagic trawl (various depths), and bottom trawl (>80 m). Frequencies of alleles at the Pan I locus (4218 fish analysed) showed highly significant differences among samples collected in the different habitats. The Pan IA allele showed a mean frequency of ~80% in the shore seine samples, 12% in the bottom trawl samples, and between 5 and 57% in the pelagic samples. These differences are thought to reflect the co-occurrence of different populations of cod in the area with different settling regimes. Shallow-water settlers are thought to represent the stationary Norwegian coastal cod (NCC), the deep-water settlers represent the migratory Arcto-Norwegian cod (ANC), and the non-settled individuals represent a variable mixture of the 2 populations. For designated samples, we analyzed 16 microsatellites (non-neutral and neutral) that supported a genetic divergence between shallow-water and deep-water settlers. Correlations between length and Pan I genotypes within selected samples showed that the Pan IBB homozygotes (typical of ANC) were significantly longer than the Pan IAA homozygotes (typical of NCC). This could reflect differences in spawning time and growth conditions between ANC and NCC, just as well as one genotype being superior to the others in terms of growth performance. Finally, we argue that the Pan I difference between 0-group NCC and ANC is not caused by contemporary selection but reflects adaptation on an ecological post-glacial time scale.no_NO
dc.language.isoengno_NO
dc.publisherInter-Researchno_NO
dc.subjectcodno_NO
dc.subjecttorskno_NO
dc.subject0-groupno_NO
dc.subject0-gruppeno_NO
dc.titleSettling-depth vs. genotype and size vs. genotype correlations at the Pan I locus in 0-group Atlantic cod Gadus morhuano_NO
dc.typeJournal articleno_NO
dc.typePeer reviewedno_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922no_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921no_NO
dc.source.pagenumber267-278no_NO
dc.source.volume468no_NO
dc.source.journalMarine Ecology Progress Seriesno_NO
dc.identifier.doi10.3354/meps09990


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