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dc.contributor.authorBeltestad, Arvid K.
dc.contributor.authorMisund, Ole Arve
dc.date.accessioned2012-08-02T12:13:16Z
dc.date.available2012-08-02T12:13:16Z
dc.date.issued1988
dc.identifier.citationThis report is not to be cited without prior reference to the authorsno_NO
dc.identifier.urihttp://hdl.handle.net/11250/104388
dc.description.abstractThe Norwegian coastal purse seiners, with shallow nets, have experienced difficulties in catching the herring due to their natura! behaviour being located too deep during day time and toe scattered during night time. Experiments, conducted by FTFI, have shown that scattered congregations of herring may be concentrated by underwater light. When light was switched on underneath the school, the herring immediately rose towards the surface with a speed of approximately 20 m/min. Use of underwater light to manipulate the natural behaviour of herring would increase the efficiency, and consequently the economic benefit for the costal purse seiners.no_NO
dc.language.isoengno_NO
dc.publisherICESno_NO
dc.relation.ispartofseriesICES CM Documents;1988/B:24
dc.subjectpurse seineno_NO
dc.subjectsnurpenotno_NO
dc.subjectgear experimentsno_NO
dc.subjectredskapsforsøkno_NO
dc.titleBehaviour of Norwegian spring spawning herring in relation to underwater lightno_NO
dc.typeWorking paperno_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485no_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924no_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921no_NO
dc.source.pagenumber16 s.no_NO


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