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dc.contributor.authorLiu, Xiaozi
dc.contributor.authorHansen, Cecilie
dc.contributor.authorNedreaas, Kjell Harald
dc.contributor.authorStockhausen, Hagen
dc.contributor.authorHeino, Mikko Petteri
dc.date.accessioned2022-12-01T10:32:01Z
dc.date.available2022-12-01T10:32:01Z
dc.date.created2022-11-23T15:43:38Z
dc.date.issued2022
dc.identifier.citationICES Journal of Marine Science. 2022, .en_US
dc.identifier.issn1054-3139
dc.identifier.urihttps://hdl.handle.net/11250/3035278
dc.description.abstractFishermen make repeated choices with respect to when, where, and how to catch their target species. While these targeting tactics—and the factors shaping them—are known to fishers and some experts, knowledge about them is largely informal and not well utilized for management purposes. To formalize information on targeting tactics, we propose a set of methods combining model-based classification of target species with generalized linear models. We apply these methods to Norwegian coastal fishing vessels that caught Atlantic cod (Gadus morhua) as a part of their catch portfolio in 2019. The data contains nearly 32000 fishing trips by 761 vessels. Gaussian mixture models identify eight latent targeting tactics. Cod contributes significantly to three of the tactics. The Herfindahl–Hirschman Index, a measure of vessel-level diversity of tactics, shows that one quarter of the vessels had a specialized strategy (targeting cod plus at most one additional tactic). While cod is often studied as a single-species fishery, we show that cod-catching vessels can be engaged in relatively pure fisheries during some fishing trips but switch to different, often more mixed targets during other trips. We term this as “sequential mixed fisheries”. This is both a challenge and an opportunity for the fisheries management.en_US
dc.language.isoengen_US
dc.titleGaussian mixture models reveal highly diverse targeting tactics in a coastal fishing fleeten_US
dc.title.alternativeGaussian mixture models reveal highly diverse targeting tactics in a coastal fishing fleeten_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber19en_US
dc.source.journalICES Journal of Marine Scienceen_US
dc.identifier.doi10.1093/icesjms/fsac207
dc.identifier.cristin2079441
dc.relation.projectNorges forskningsråd: 288192en_US
dc.relation.projectNorges forskningsråd: 288037en_US
dc.relation.projectNorges forskningsråd: 314248en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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