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Effects of different slipping methods on the mortality of sardine, Sardina pilchardus, after purse-seine capture off the Portuguese Southern coast (Algarve)

2018-05Journal article Open access
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dc.contributor.authorMarçalo, Ana
dc.contributor.authorGuerreiro, Pedro
dc.contributor.authorBentes, Luis
dc.contributor.authorRangel, Mafalda
dc.contributor.authorMonteiro, Pedro
dc.contributor.authorOliveira, Frederico
dc.contributor.authorAfonso, Carlos
dc.contributor.authorPousao-Ferreira, Pedro
dc.contributor.authorBenoit, Hugues P.
dc.contributor.authorBreen, Mike
dc.contributor.authorErzini, Karim
dc.contributor.authorGonçalves, Jorge Manuel Santos
dc.date.accessioned2018-12-07T14:57:53Z
dc.date.available2018-12-07T14:57:53Z
dc.date.issued2018-05
dc.description.abstractThe effects of two different slipping methods on the survival, physical and physiological response of sardines, Sardina pilchardus, captured in a purse-seine fishery were investigated in southern Portugal. Sardines were collected and transferred into holding tanks onboard a commercial fishing vessel after being captured, crowded and deliberately released using two slipping procedures: standard and modified. The standard slipping procedure aggregated fish at high densities and made them "roll over" the floatline, while the modified procedure aggregated the fish at moderate densities and enabled them to escape through an opening created by adding weights to the floatline. Both slipping methods were compared with minimally harmed non-slipped sardines (sardines collected from the loose pocket of the purse seine). Survival rates were monitored in captivity over 28 days using three replicates for each treatment. The estimated survival of sardines was 43.6% for the non-slipped fish, 44.7% for the modified slipping and 11.7% for the standard slipping treatments. Scale loss indicated the level of physical impact experienced, with dead fish from the non-slipped and modified slipping technique showing significantly lower scale loss than those fish from the standard slipping treatment within the same period. Of the physiological indicators of stress measured, cortisol, glucose, lactate and osmolality attained peak values during slipping and up to the first hours after introduction to captivity. This work indicates that although delayed mortality after release may be substantial, appropriately modified slipping techniques significantly enhance survival of slipped sardines.
dc.description.sponsorshipFCT [SFRH/BPD/116307/2016]; European Commission's Horizon 2020 Research and Innovation Programme [634495]
dc.identifier.doi10.1371/journal.pone.0195433
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/10400.1/11745
dc.language.isoeng
dc.peerreviewedyes
dc.publisherPublic Library Science
dc.relationScience, Technology, and Society Initiative to minimize Unwanted Catches in European Fisheries
dc.subjectDiscard mortality
dc.subjectNorthern Portugal
dc.subjectTrawl fishery
dc.subjectRainbow trout
dc.subjectScale loss
dc.subjectBy catch
dc.subjectStress
dc.subjectCortisol
dc.subjectSeawater
dc.subjectDensities
dc.titleEffects of different slipping methods on the mortality of sardine, Sardina pilchardus, after purse-seine capture off the Portuguese Southern coast (Algarve)
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleScience, Technology, and Society Initiative to minimize Unwanted Catches in European Fisheries
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/634495/EU
oaire.citation.issue5
oaire.citation.titlePlos One
oaire.citation.volume13
oaire.fundingStreamH2020
person.familyNameMarçalo
person.familyNameGuerreiro da Costa Guerreiro
person.familyNameBentes
person.familyNameRangel
person.familyNameMonteiro
person.familyNameOliveira
person.familyNameAfonso
person.familyNameErzini
person.familyNameGonçalves
person.givenNameAna
person.givenNamePedro Miguel
person.givenNameLuis
person.givenNameMafalda
person.givenNamePedro
person.givenNameFrederico
person.givenNameCarlos
person.givenNameKarim
person.givenNameJorge Manuel Santos
person.identifierR-000-JHM
person.identifierA-2539-2009
person.identifier356846
person.identifier.ciencia-id7314-E2C4-78A2
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person.identifier.ciencia-idD917-7133-341A
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person.identifier.orcid0000-0002-4318-604X
person.identifier.orcid0000-0002-9084-2177
person.identifier.orcid0000-0002-1411-0126
person.identifier.orcid0000-0001-7704-8190
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person.identifier.scopus-author-id35230254000
person.identifier.scopus-author-id7004015948
person.identifier.scopus-author-id7103326116
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccess
rcaap.typearticle
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