dc.contributor.author | Mehl, Sigbjørn | |
dc.date.accessioned | 2008-07-07T11:35:21Z | |
dc.date.issued | 1986 | |
dc.identifier.uri | http://hdl.handle.net/11250/100247 | |
dc.description.abstract | A stomach sampling program has been carried out in connection with the construction of a multispecies modell for the Barents Sea. The results on the contents of 8410 cos (Gadus morhua) stomachs sampled in 1982-1985 are presented. The samples were collected by bottom- and pelagic trawl onboard Norwegian research vessels during routine surveys in the Barents Sea and the Spitsbergen area. For cod > 20 cm the major prey species in percent wet weight of the stomach content were capelin (Mallotus villosus) (40 %), deep sea shrimp (Pandalus borealis) (20 %) and redfish (Sebastes spp. ) (7 %). Capelin was the dominating prey species during the first part of the year. In the diet of smaller cod the most important prey species were shrimp (13 %), krill (Euphausiacea) (9 %), amphipods (16 %) and other small crustaceans (11 %). Since 1982 there has been a drop in the average stomach contents weights of cod > 20 cm in periods with a high content of capelin and since 1984 the relative importance of deep sea shrimp as prey species has been reduced. A preliminary estimate of the cod’s annual food consumption shows a consume of 2-3 times the biomass of the cod stock. | en |
dc.format.extent | 2271175 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | en |
dc.relation.ispartofseries | ICES CM documents | en |
dc.relation.ispartofseries | 1986/G:29 | en |
dc.title | Stomach contents of North-East Arctic cod and possible changes in the diet the last years | en |
dc.type | Working paper | en |
dc.subject.nsi | VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 | en |
dc.source.pagenumber | 24 s. | |