Vis enkel innførsel

dc.contributor.authorIversen, Svein A.
dc.date.accessioned2012-04-19T13:28:44Z
dc.date.available2012-04-19T13:28:44Z
dc.date.issued1981
dc.identifier.citationThis report is not to be quoted without prior consultation with the General Secretary.no_NO
dc.identifier.urihttp://hdl.handle.net/11250/103108
dc.description.abstractA declinining trend in the size of the spawning stock of North Sea mackerel is described by data obtained from egg surveys. During the period 1973-1980 the spawning stock size was reduced by 60-70%. A similar stock development has been demonstrated by VPA of catch data and on tagging results. An egg production curve for 1980 based on three egg surveys in the North Sea combined with daily sampling from a fixed position within the spawning area is given. Attempts are made to estimate the size of the spawning stock from the egg production curve and data published on fecundity.
dc.language.isoengno_NO
dc.publisherICESno_NO
dc.relation.ispartofseriesICES CM Documents;1981/H:16
dc.subjectstock assessmentno_NO
dc.subjectbestandsberegningno_NO
dc.subjectspawning stockno_NO
dc.subjectgytebestandno_NO
dc.titleSpawning and trends in spawning stock size of the North Sea mackerel during the period 1973-1980no_NO
dc.typeWorking paperno_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921no_NO
dc.source.pagenumber20 s.no_NO


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel