Using acoustically visible gillnets to reduce bycatch of a small cetacean: first pilot trials in a commercial fishery

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dc.authoridKindt-Larsen, Lotte/0000-0003-4696-5943
dc.authorid, sabri/0000-0003-2321-547X
dc.authoridStepputtis, Daniel/0000-0003-4824-1631
dc.authoridBilgin, Sabri/0000-0003-0155-8981
dc.authoridBrooks, Mollie Elizabeth/0000-0001-6963-8326
dc.authoridKratzer, Isabella/0000-0003-2203-6955
dc.authoridOzdemir, Suleyman/0000-0002-2247-0703
dc.contributor.authorKratzer, Isabella Maria Friederike
dc.contributor.authorBrooks, Mollie Elizabeth
dc.contributor.authorBilgin, Sabri
dc.contributor.authorOzdemir, Suleyman
dc.contributor.authorKindt-Larsen, Lotte
dc.contributor.authorLarsen, Finn
dc.contributor.authorStepputtis, Daniel
dc.date.accessioned2025-03-23T19:41:41Z
dc.date.available2025-03-23T19:41:41Z
dc.date.issued2021
dc.departmentSinop Üniversitesi
dc.description.abstractBycatch of protected species, particularly small cetaceans, in gillnets is a worldwide concern. One hypothesis for this is that echolocating cetaceans entangle because they do not perceive conventional gillnets as impenetrable barriers, owing to the gillnet's faint echo. A gillnet modified for improved acoustical visibility was tested in a first pilot trial in a commercial gillnet fishery targeting turbot (Scophthalmus maeoticus) on the Turkish Black Sea coast. This study is the first demonstration of the viability of using a gillnet equipped with small acrylic glass spheres to reduce bycatch of harbor porpoises in a commercial fishery and provides the basis for full-scale sea trials of the gear in commercial fisheries through a power analysis. In these pilot experiments, the focus lied on the handling of the gear and identification of requirements for a full-scale trial, but results include promising bycatch data for an endangered echolocating marine mammal (Phocoena phocoena) and no reduction in catch efficiency of a bottom-dwelling, vulnerable species (Raja clavata).
dc.description.sponsorshipGerman Federal Agency for Nature Conservation(Bundesamt fur Naturschutz) [3516821300]
dc.description.sponsorshipThe authors thank the fishers Murat Yilmazer, Ahmet Arici, and Faruk Atal, who participated in the study, and shellcatch, inc. for lending the electronic monitoring system. The authors thank C. Zimmermann, U. Krumme, B. Anthony, J. Santos and the anonymous reviewers for helpful comments on this manuscript. Legal permissions required for carrying out this study were obtained from the following institutions: the Ministry of Foreign Affairs, the Ministry of Agriculture and Forestry, the Ministry of Culture and Tourism, the Higher Education Council, and the Sinop University Administrative Committee. The authors thank all institutions and organizations for their support. This work was funded by the German Federal Agency for Nature Conservation(Bundesamt fur Naturschutz, project no. 3516821300, Entwicklung von alternativen Managementans atzen und Fangtechniken zur Minimierung der Konflikte zwischen Stellnetzfischerei und Naturschutzzielen in der deutschen AWZ der Ostsee -STELLA).
dc.identifier.doi10.1016/j.fishres.2021.106088
dc.identifier.issn0165-7836
dc.identifier.issn1872-6763
dc.identifier.scopus2-s2.0-85111295462
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1016/j.fishres.2021.106088
dc.identifier.urihttps://hdl.handle.net/11486/6617
dc.identifier.volume243
dc.identifier.wosWOS:000690441900001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofFisheries Research
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectbycatch
dc.subjectgillnet modification
dc.subjectPhocoena phocoena
dc.subjectturbot fishery
dc.subjectRaja clavata
dc.titleUsing acoustically visible gillnets to reduce bycatch of a small cetacean: first pilot trials in a commercial fishery
dc.typeArticle

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