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Evaluating dolphin interactions with bottom-set net fisheries off Southern Iberian Atlantic waters

2024-10Journal article Open access
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dc.contributor.authorVighnesh Samel
dc.contributor.authorFlávia Carvalho
dc.contributor.authorMagda Frade
dc.contributor.authorMarçalo, Ana
dc.contributor.authorErzini, Karim
dc.contributor.authorGonçalves, Jorge Manuel Santos
dc.date.accessioned2024-09-18T13:55:48Z
dc.date.available2024-09-18T13:55:48Z
dc.date.issued2024-10
dc.description.abstractThe present study, covering 2018-2022, evaluated the cetacean interactions with a bottom-set net fishery along the mainland Portuguese Southern coast (Algarve), estimating bycatch, depredation, gear damage and net length influence on Landing per Unit Effort (LPUE). The fishery employed various m & eacute;tiers (gillnets - mesh sizes: < 60, 60-75, 80 and 220 mm; trammel nets - 120 inner and 640 mm outer panels). Observations from 655 hauls revealed depredation by bottlenose dolphins in 17.7 % of hauls, while bycatch (isolated events of 4 bottlenose dolphins and one common dolphin) occurred in < 1 %. Depredation typically results in heavy damage to the net and occurs throughout the year, with elevated rates observed during the spring and winter months. Depredation rates varied among m & eacute;tiers, being higher in gears targeting red mullet and hake. The impact of depredation on LPUE varied based on net length and the targeted fish species. However, when comparing LPUE in hauls without depredation, there was no significant influence on the total and hake LPUE for nets shorter or longer than 6 km (p > 0.05). Interestingly, in hauls targeting red mullets without depredation, nets shorter than 6 km had a significantly higher LPUE (p < 0.01) compared to nets 6 km or longer, suggesting that longer nets increase fishing effort due to prolonged soaking times and a higher likelihood of depredation.eng
dc.description.sponsorshipMAR01.03.01-FEAMP-0020; DG-ENV/MSFD 2020; LIFE18/NAT/PT/000927
dc.identifier.doi10.1016/j.fishres.2024.107100
dc.identifier.issn0165-7836
dc.identifier.urihttp://hdl.handle.net/10400.1/25903
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier BV
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relation.ispartofFisheries Research
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBycatch
dc.subjectBottom -set nets
dc.subjectDepredation
dc.subjectDolphins
dc.subjectFisheries interactions
dc.subjectFisheries me tiers
dc.titleEvaluating dolphin interactions with bottom-set net fisheries off Southern Iberian Atlantic waterseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.startPage107100
oaire.citation.titleFisheries research
oaire.citation.volume278
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMarçalo
person.familyNameErzini
person.familyNameGonçalves
person.givenNameAna
person.givenNameKarim
person.givenNameJorge Manuel Santos
person.identifierR-000-JHM
person.identifier356846
person.identifier.ciencia-id7314-E2C4-78A2
person.identifier.ciencia-idD917-7133-341A
person.identifier.ciencia-id1013-ED6A-65EB
person.identifier.orcid0000-0002-0485-341X
person.identifier.orcid0000-0002-1411-0126
person.identifier.orcid0000-0001-7704-8190
person.identifier.ridM-5216-2013
person.identifier.ridG-5206-2011
person.identifier.scopus-author-id6505855915
person.identifier.scopus-author-id7004015948
person.identifier.scopus-author-id7103326116
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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