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dc.contributor.authorJørstad, Knut Eirik
dc.contributor.authorNævdal, Gunnar
dc.date.accessioned2012-08-31T15:07:27Z
dc.date.available2012-08-31T15:07:27Z
dc.date.issued1992
dc.identifier.citationThis report is not to be cited without prior reference to the authorsno_NO
dc.identifier.urihttp://hdl.handle.net/11250/105066
dc.description.abstractThe study reported here is part of a more extensive investigation on the effects of mass rearing and release of 0-group cod in fjords and coastal areas in Norway. Each year since 1987 pond produced cod have been liberated in Masfjorden, a small fjord north of Bergen. The released cod as well as the wild cod and the cod recovered in the fjord have been genetically characterized by electrophoretic analyses of haemoglobins and the enzymes LDH, PGI, PGM and GPD. In 1990 and 1991 about half of the released cod consisted of offspring of broodstock homozygotous for a rare allele (Pgi-l ( 30). This broodstock was produced by crossing preselected heterozygotes for this allele, the homozygotes among the offspring were sorted out on basis of biopsy sampling of muscle tissue, and when matured, used as parents for the released cod. In general good accordance between gene frequencies of the released and recovered fish, and no indications of directional selection, were found. Genetic tagging seems to be a useful method both for control of survival, growth rate and dispersal of released cod, and also for more long term studies on hybridization and gene introgression between natural and reared populations.no_NO
dc.language.isoengno_NO
dc.publisherICESno_NO
dc.relation.ispartofseriesICES CM Documents;1992/G:65
dc.subjectcodno_NO
dc.subjecttorskno_NO
dc.subjectgeneticsno_NO
dc.subjectgenetikkno_NO
dc.subjectrecaptureno_NO
dc.subjectgjenfangstno_NO
dc.titleGenetic studies on released and recaptured cod in a fjord systemno_NO
dc.typeWorking paperno_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921no_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452no_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923no_NO
dc.source.pagenumber6 s.no_NO


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