Show simple item record

dc.contributor.authorBjørge, Arne
dc.date.accessioned2012-07-03T09:20:11Z
dc.date.available2012-07-03T09:20:11Z
dc.date.issued1985
dc.identifier.citationThis report is not to be cited without prior reference to the authorno_NO
dc.identifier.urihttp://hdl.handle.net/11250/104068
dc.description.abstractA sample of 52 cods, Gadus morhua, caught close to a grey seal, Halichoerus grypus, haul out site, and a total of 652 cods from 18 commercial catches (average sample size 36 cods) were examined with regard to cod worm infestation. The sampling was carried out from July 1978 to January 1981 in Norwegian coastal waters between 62° and 66° North. The presence of larval cod worm was recorded in 64% of the examined fishes, and the average infestation in all 704 fishes was 8.5 cod-worms per fish. However, the infestation decreased significantly with increasing distances from the haul out sites of grey seals and common seals, Phoca vitulina. The heaviest infestations were recorded in cod from the outern part of in shore waters, and slightly decreasing towards the fjords, fitting well to the observed distribution of seals. A substantial decrease was also recorded with increasing distance (and depth) off shore from the mentioned grey seal haul out site.no_NO
dc.language.isoengno_NO
dc.publisherICESno_NO
dc.relation.ispartofseriesICES CM Documents;1985/N:4
dc.subjectsealno_NO
dc.subjectselno_NO
dc.subjectfish diseasesno_NO
dc.subjectfiskesykdommerno_NO
dc.subjectcodno_NO
dc.subjecttorskno_NO
dc.titleThe relationship between seal abundance and cod worm (Phocanema decipiens) infestation in cod in Norwegian coastal watersno_NO
dc.typeWorking paperno_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921no_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923no_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452no_NO
dc.source.pagenumber8 s.no_NO


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record