Abundance estimation of schools using a fisheries sonar

dc.contributor.author	Misund, Ole Arve
dc.contributor.author	Floen, Svein
dc.date.accessioned	2012-08-28T13:38:59Z
dc.date.available	2012-08-28T13:38:59Z
dc.date.issued	1991
dc.identifier.citation	This report is not to be cited without prior reference to the authors	no_NO
dc.identifier.uri	http://hdl.handle.net/11250/104850
dc.description.abstract	An attempt of abundance estimation of fish schooling close to surface using sonar was conducted in Eastern North Sea - Skagerrak in September 1990. The method is based on measurements of the school area by the Furuno CSH-70 sonar and purse seine capture of schools to establish a school-area to school-biomass relationship. In the actual region, the biomass of herring and mackerel was estimated to about 90 000 ton and 430 000 ton, respectively. The accuracy of the method is discussed and improvements suggested.	no_NO
dc.language.iso	eng	no_NO
dc.publisher	ICES	no_NO
dc.relation.ispartofseries	ICES CM Documents;1991/B:35
dc.subject	sonar	no_NO
dc.subject	bestandsberegning	no_NO
dc.subject	stock assessment	no_NO
dc.title	Abundance estimation of schools using a fisheries sonar	no_NO
dc.type	Working paper	no_NO
dc.subject.nsi	VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924	no_NO
dc.subject.nsi	VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452	no_NO
dc.source.pagenumber	15 s.	no_NO