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In this work, the relationship between catchability and two measures of the degree of spatial concentration of a trawl fleet (the fleet's spatial extent and the fleet's degree of spatial patchiness) is investigated for four different fish stocks. The catchability of northeast Arctic cod (<i>Gadus morhua</i>) is strongly related to the fleet's degree of spatial concentration, but the relationship is weaker for northeast Arctic haddock (<i>Melanogrammus aeglefinus</i>), and no relationships appear for two saithe (<i>Pollachius virens</i>) stocks. Our findings suggest that adjusting CPUE with a measure of the fleet's average degree of concentration relates CPUE more strongly with abundance for migratory stocks.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Catchability and the spatial distribution of fishing vessels","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2003,"MonPub":null,"DateUpdate":"2003-06-05","DateCreate":"2003-06-05","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000183107000003","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":35363,"PubliDate":2003,"Pagination":"259-268","XtraPublOfAnaID":null,"ISBN":null,"Volume":"60","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42535,"SerRR":"Canadian Journal of Fisheries and Aquatic Sciences = Journal canadien des sciences halieutiques et aquatiques. 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