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dc.contributor.authorIngólfsson, Ólafur Arnareng
dc.contributor.authorJørgensen, Terjeeng
dc.date.accessioned2006-06-01T08:07:16Z
dc.date.available2006-06-01T08:07:16Z
dc.date.issued2006eng
dc.identifier.issn0165-7836en_US
dc.identifier.urihttp://hdl.handle.net/1956/1191
dc.descriptionThis is a preprint of an article submitted for consideration in Fisheries Research, Copyright 2006, Elsevier. Fisheries Research is available at http://www.sciencedirect.com/science/journal/01657836en
dc.description.abstractEscapement of Atlantic cod (Gadus morhua), haddock (Melanogrammus aegle nus) and saithe (Pollachius virens) beneath a commercial bottom trawl, rigged with a 60 cm diameter rockhopper gear, was studied in the Barents Sea. The study was performed off the coast of north Norway in March/April 2003. In order to collect the escapees, three sampling bags were attached behind the rockhopper gear. Approximately one third of the cod and a quarter of the haddock available to the trawl escaped. Cod escape rates were highly length dependent, following a sigmoid curve with an estimated length at 50% escape of 38.5 cm and interquartile width of 34.1 cm. Length dependence was less pronounced in haddock. The escape rate of saithe was not length dependent, and on average seven percent passed under the trawl's shing line. Fish abundance had no observable effects on escape rates. Both video observations and scale abrasions on the fi sh caught in the collecting bags showed that some of the escaped fish had been overrun by the gear.en_US
dc.format.extent1592790 byteseng
dc.format.mimetypeapplication/pdfeng
dc.language.isoengeng
dc.publisherElsevieren_US
dc.relation.ispartofseriesFisheries Researchen
dc.titleEscapement of gadoid fish beneath a commercial bottom trawl : relevence to the overall trawl selectivityen_US
dc.typePeer reviewed
dc.typeJournal article
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497nob


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