Recruitment indeces of the Arcto-Norwegian cod for the period 1965-1979 based on the international 0-group fish surveys
dc.contributor.author | Randa, Kjell | |
dc.date.accessioned | 2010-07-01T09:02:04Z | |
dc.date.available | 2010-07-01T09:02:04Z | |
dc.date.issued | 1982 | |
dc.identifier.citation | This report is not to be quoted without prior consultation with the General Secretary. | en_US |
dc.identifier.uri | http://hdl.handle.net/11250/101089 | |
dc.description.abstract | The trawl data from the International 0-group fish surveys in the Barents Sea are analysed. The fishing powers of the participating vessels are estimated and corrected for. Relative indices of yearclass strength are computed on a linear and a logarithmic scale. The strongest yearclasses are found to be, in order, 1970, 1975 and 1973. Medium year classes are 1971, 1977, 1972 and 1974, the rest, for the period 1965-1979, is poor. These indices, when excluding the 1969 yearclass, give a correlation of 0.93 for the linear index and 0.96 for the logarithmic index for the period 1965-1975, with VPA estimates of 3-years old cod. Linear regression are used to predict the absolute size of the recruitment 1976-1979 yearclasses, and indicates an average recruitment of about 300 mill. 3-years old fish . | en_US |
dc.language.iso | eng | en_US |
dc.publisher | ICES | en_US |
dc.relation.ispartofseries | ICES CM documents;1982/G:43 | |
dc.subject | 0-gruppe | en_US |
dc.subject | 0-group | en_US |
dc.title | Recruitment indeces of the Arcto-Norwegian cod for the period 1965-1979 based on the international 0-group fish surveys | en_US |
dc.type | Working paper | en_US |
dc.subject.nsi | VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 | en_US |
dc.source.pagenumber | 22 s. | en_US |
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ICES CM documents authored by IMR scientists (1949-2011) [3138]
Includes a few working documents.