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Impact and size selectivity of fishing gears used in estuarine crab fisheries

2025-02Journal article Open access
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dc.contributor.authorMonteiro, João Nuno
dc.contributor.authorOvelheiro, Andreia
dc.contributor.authorTeodosio, Maria
dc.contributor.authorLeitão, Francisco
dc.date.accessioned2025-02-14T10:28:06Z
dc.date.available2025-02-14T10:28:06Z
dc.date.issued2025-02
dc.description.abstractCrustacean fisheries have expanded in the last decade due to the high economic value of the species. However, estuarine crustacean fisheries remain poorly studied compared with marine crustacean fisheries. In Portugal, the European green crab ( Carcinus maenas) may become increasingly important for the fishing industry and seafood production in general, especially in the current context of overexploitation of estuarine traditional fisheries resources. The unknown ecological impact of crab fishing gear and its size-selectivity characteristics constrain gear regulations by fisheries authorities. We developed an integrated study over three years to analyse a C. maenas fishery in three Portuguese estuarine systems aiming to: 1) describe the fishing characteristics and modus operandi of the fishing gears; 2) analyse gear selectivity and catch rates; 3) analyse environmental impact of fishing gears; 4) Contribute to supporting better regulations for the fishery. Two types of crab fishing gear are used, box traps and drop nets. Daily catches of green crabs varied by gear, system, and month, with the highest catches observed in box traps during the warmest months. Selectivity studies indicate that a mesh size of 18 mm in box traps and 30 mm in drop nets would allow crabs larger than the minimum landing size (40 mm carapace width) to be targeted while maximising catch rates. However, regardless of the mesh size, the catch from both gears will need to be sorted to exclude juveniles from the catch. The bar spacing, which allows crabs to be sorted according to the minimum landing size, is 17 mm. Gears present none (drop nets) or low by-catch (220 g or 23 individuals/40 box traps), which was promptly discarded, indicating a low impact on estuarine communities. The methodology used in this study, which combines ecological impacts and technical gear issues (selectivity), can be directly applied to enforce regulations and improve sustainable exploitation of socio-economically important artisanal fisheries.eng
dc.description.sponsorshipSFRH/BD/06336/2021; DL57/2016/CP1361/CT0008; 2022.04803.CEECIND; European Universities designing the horizons of Sustainability-Europe 101071300
dc.identifier.doi10.1016/j.fishres.2025.107284
dc.identifier.issn0165-7836
dc.identifier.urihttp://hdl.handle.net/10400.1/26799
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationCentre for Marine and Environmental Research
dc.relationClimate-mediated shifts in marine resources: an eco-socio-economic approach to assess vulnerability of fisheries to Climate Change.
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relation.ispartofFisheries Research
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectCarcinus maenas
dc.subjectArtisanal fishery
dc.subjectBy-catch
dc.subjectMesh size-selectivity
dc.subjectManagement measures
dc.subjectEnvironmental impact
dc.titleImpact and size selectivity of fishing gears used in estuarine crab fisherieseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardTitleClimate-mediated shifts in marine resources: an eco-socio-economic approach to assess vulnerability of fisheries to Climate Change.
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/CEEC IND5ed/2022.04803.CEECIND%2FCP1729%2FCT0006/PT
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.citation.startPage107284
oaire.citation.titleFisheries Research
oaire.citation.volume282
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamCEEC IND5ed
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMonteiro
person.familyNameOvelheiro
person.familyNameTeodosio
person.familyNameLeitão
person.givenNameJoão Nuno
person.givenNameAndreia
person.givenNameMaria
person.givenNameFrancisco
person.identifier620214
person.identifier.ciencia-id2F11-D45B-0FE9
person.identifier.ciencia-id9516-FB49-B62C
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.ciencia-id3E1C-DBC2-42D5
person.identifier.orcid0000-0003-1328-7592
person.identifier.orcid0000-0002-4528-6300
person.identifier.orcid0000-0002-0939-9885
person.identifier.orcid0000-0003-4983-9782
person.identifier.ridB-5077-2013
person.identifier.ridM-3980-2013
person.identifier.scopus-author-id56196396700
person.identifier.scopus-author-id7003991946
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.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
project.funder.nameFundação para a Ciência e a Tecnologia
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