Vis enkel innførsel

dc.contributor.authorAglen, Asgeir
dc.contributor.authorMisund, Ole Arve
dc.date.accessioned2012-08-21T14:29:42Z
dc.date.available2012-08-21T14:29:42Z
dc.date.issued1990
dc.identifier.citationThis report is not to be cited without prior reference to the authorsno_NO
dc.identifier.urihttp://hdl.handle.net/11250/104701
dc.description.abstractSwimming behaviour of schooling herring, mackerel and sprat, when approached by a survey vessel, was observed by aid of a true motion sonar. Observations were made both during surveying and during pelagic trawling. Horizontal swimming speed was clearly length dependent, but there were great variations from one school to another, even if the school members were of similar size. Generally the schools seemed to be guided by the approaching vessel, but often the schools avoided the path of the vessel. An attempt is made to quantify the influence of vessel-avoidance and upper blind zone distribution on the total abundance estimate. By taking advantage of the guiding effect, and modifying the gear rigging, the capture success of the pelagic sampling trawl was clearly increased.no_NO
dc.language.isoengno_NO
dc.publisherICESno_NO
dc.relation.ispartofseriesICES CM Documents;1990/B:38
dc.subjectfish behaviourno_NO
dc.subjectfiskeatferdno_NO
dc.titleSwimming behaviour of fish schools in the North Sea during acoustic surveying and pelagic sampling trawlingno_NO
dc.typeWorking paperno_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485no_NO
dc.source.pagenumber22 s.no_NO


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel