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High coral bycatch in bottom-set Gillnet Coastal fisheries reveals rich coral habitats in Southern Portugal

2020Journal article Open Access
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dc.contributor.authorDias, Vítor
dc.contributor.authorOliveira, Frederico
dc.contributor.authorBoavida, Joana
dc.contributor.authorSerrao, Ester
dc.contributor.authorGonçalves, Jorge Manuel Santos
dc.contributor.authorCoelho, Márcio
dc.date.accessioned2020-12-14T13:54:00Z
dc.date.available2020-12-14T13:54:00Z
dc.date.issued2020
dc.description.abstractBottom-contact fisheries are unquestionably one of the main threats to the ecological integrity and functioning of deep-sea and circalittoral ecosystems, notably cold-water corals (CWC) and coral gardens. Lessons from the destructive impact of bottom trawling highlight the urgent need to understand how fisheries affect these vulnerable marine ecosystems. At the same time, the impact of other fishing gear and small-scale fisheries remains sparsely known despite anecdotal evidence suggesting their impact may be significant. This study aims to provide baseline information on coral bycatch by bottom-set gillnets used by artisanal fisheries in Sagres (Algarve, southwestern Portugal), thereby contributing to understand the impact of the activity but also the diversity and abundance of corals in this region. Coral bycatch frequency and species composition were quantified over two fishing seasons (summer-autumn and spring) for 42 days. The relationship with fishing effort was characterized according to metiers (n = 6). The results showed that 85% of the gillnet deployments caught corals. The maximum number of coral specimens per net was observed in a deployment targeting Lophius budegassa (n = 144). In total, 4,326 coral fragments and colonies of 22 different species were captured (fishing depth range of 57-510 m, mean 139 +/- 8 m). The most affected species were Eunicella verrucosa (32%), Paramuricea grayi (29%), Dendrophyllia cornigera (12%), and Dendrophyllia ramea (6%). The variables found to significantly influence the amount of corals caught were the target species, net length, depth, and mesh size. The 22 species of corals caught as bycatch belong to Orders Alcyonacea (80%), Scleractinia (18%), Zoantharia (1%), and Antipatharia (1%), corresponding to around 13% of the coral species known for the Portuguese mainland coast. These results show that the impact of artisanal fisheries on circalittoral coral gardens and CWC is potentially greater than previously appreciated, which underscores the need for new conservation measures and alternative fishing practices. Measures such as closure of fishing areas, frequent monitoring onboard of fishing vessels, or the development of encounter protocols in national waters are a good course of action. This study highlights the rich coral gardens of Sagres and how artisanal fisheries can pose significant threat to corals habitats in certain areas.pt_PT
dc.description.sponsorshipHABMAR (Grant No.MAR-01.04.02-FEAMP-0018) co-financed by the European Maritime and Fisheries Fund of the Operational Program MAR 2020 for Portugal (Portugal 2020), TECPESCA (Grant No. MAR2020 16-01-04-FMP-0010), and MARSW (Grant No. POSEUR/ICNF/LPN). FCT: UIDB/04326/2020/ SFRH/BSAB/150485/2019.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3389/fmars.2020.603438pt_PT
dc.identifier.eissn2296-7745
dc.identifier.urihttp://hdl.handle.net/10400.1/14911
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFrontiers Mediapt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCoral gardenspt_PT
dc.subjectBottom fisheries impactpt_PT
dc.subjectMarine animal forestspt_PT
dc.subjectBenthic invertebrate bycatchpt_PT
dc.subjectBiodiversity conservation and managementpt_PT
dc.subjectCold-water coralspt_PT
dc.subjectVulnerable marine ecosystemspt_PT
dc.titleHigh coral bycatch in bottom-set Gillnet Coastal fisheries reveals rich coral habitats in Southern Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleFrontiers in Marine Sciencept_PT
oaire.citation.volume7pt_PT
person.familyNameOliveira
person.familyNameboavida
person.familyNameSerrao
person.familyNameGonçalves
person.familyNameA. G. Coelho
person.givenNameFrederico
person.givenNamejoana
person.givenNameEster A.
person.givenNameJorge Manuel Santos
person.givenNameMárcio
person.identifierC-6686-2012
person.identifier356846
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person.identifier.orcid0000-0003-1316-658X
person.identifier.orcid0000-0001-7704-8190
person.identifier.orcid0000-0001-7832-5241
person.identifier.ridM-5744-2013
person.identifier.ridG-5206-2011
person.identifier.ridE-7681-2016
person.identifier.scopus-author-id35230254000
person.identifier.scopus-author-id7004093604
person.identifier.scopus-author-id7103326116
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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