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dc.contributor.authorMelli, Valentina
dc.contributor.authorKrag, Ludvig Ahm
dc.contributor.authorHerrmann, Bent
dc.contributor.authorKarlsen, Junita Diana
dc.date.accessioned2019-01-11T20:37:32Z
dc.date.available2019-01-11T20:37:32Z
dc.date.embargoEndDate2019-04-19
dc.date.issued2018-04-18
dc.description.abstractLight-emitting diodes (LEDs) have been tested in trawl fisheries to reduce the bycatch of unwanted species through behavioural stimulation. Previous studies used LED lights to either highlight escaping routes or increase the contact rate with square-mesh panels. However, phototactic responses (moving towards or away from light sources) to LED lights could also be exploited to separate species during the catching process. We investigated if either positive or negative phototaxis can be used to improve fish vertical separation from <i>Nephrops</i> (<i>Nephrops norvegicus</i>) in the aft section of a horizontally separated trawl codend. The aim was to increase the proportion of fish entering the upper compartment. We conducted two different experiments in front of the separation into compartments, inserting green LED lights in the upper and lower netting panel, respectively. Species vertical separation was analysed and compared in two identical trawls towed in parallel, one equipped with lights and one without. We obtained significant changes in vertical separation, but no clear species-specific phototactic response was identified. Neither of the light positions improved fish separation from <i>Nephrops</i>. However, the potential of LED lights as behavioural stimulators is confirmed, and a more mechanistic understanding of light and fish vision may improve the results of future applications.en_US
dc.description.sponsorshipEuropean Maritime and Fisheries Fund The Ministry of Environment and Food of Denmarken_US
dc.descriptionThis is a pre-copyedited, author-produced version of an article accepted for publication in <i>ICES Journal of Marine Science</i> following peer review. The version of record Melli, V., Krag, L.A., Herrmann, B. & Karlsen, J.D. (2018). Investigating fish behavioural responses to LED lights in trawls and potential applications for bycatch reduction in the Nephrops-directed fishery. <i>ICES Journal of Marine Science</i>, 75(5), 1682-1692 is available online at: <a href=https://doi.org/10.1093/icesjms/fsy048> https://doi.org/10.1093/icesjms/fsy048</a>.en_US
dc.identifier.citationMelli, V., Krag, L.A., Herrmann, B. & Karlsen, J.D. (2018). Investigating fish behavioural responses to LED lights in trawls and potential applications for bycatch reduction in the Nephrops-directed fishery. <i>ICES Journal of Marine Science</i>, 75(5), 1682-1692. https://doi.org/10.1093/icesjms/fsy048en_US
dc.identifier.issn1054-3139
dc.identifier.issn1095-9289
dc.identifier.otherFRIDAID 1618704
dc.identifier.other10.1093/icesjms/fsy048
dc.identifier.urihttp://hdl.handle.net/10037/14434
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalICES Journal of Marine Science
dc.rights.accessRightsembargoedAccessen_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920en_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920en_US
dc.subjectLED lightsen_US
dc.subjectphototaxisen_US
dc.subjectvertical separationen_US
dc.subjectNephropsen_US
dc.subjectbycatch reductionen_US
dc.titleInvestigating fish behavioural responses to LED lights in trawls and potential applications for bycatch reduction in the Nephrops-directed fisheryen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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