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Consumption rates and interaction with fisheries of Mediterranean common dolphins in the Alboran Sea

2021Journal article Restricted access
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dc.contributor.authorGiménez, Joan
dc.contributor.authorAuthier, Matthieu
dc.contributor.authorValeiras, Julio
dc.contributor.authorAbad, Esther
dc.contributor.authorMarçalo, Ana
dc.contributor.authorColl, Marta
dc.contributor.authorGauffier, Pauline
dc.contributor.authorSantos, M. Begoña
dc.contributor.authorde Stephanis, Renaud
dc.date.accessioned2021-07-23T13:48:05Z
dc.date.available2021-07-23T13:48:05Z
dc.date.issued2021
dc.description.abstractCommon dolphins (Delphinus delphis) are top predators, feeding on a wide variety of prey species, several of which are also targeted by fisheries. The last remaining healthy group of the endangered Mediterranean common dolphin subpopulation is located in the Alboran Sea. Their feeding grounds overlap with the fishing grounds of trawlers targeting European hake (Merluccius merluccius) and blue whiting (Micromessistius poutassou) as well as purse seiners targeting small pelagic species such as European sardine (Sardina pilchardus), European anchovy (Engraulis encrasicolus), horse mackerel (Trachurus spp.) and mackerel (Scomber spp.). In the present study, we estimated that individual common dolphins in the Alboran Sea have a food consumption of 3.35 +/- 0.67 kg/day, based on scaling equations applied to stranded animals. This figure is similar to the ones reported for other European populations. Although common dolphins mainly feed on mesopelagic species of none or little commercial interest, they also feed on commercial species, which could lead to a potential conflict with fisheries in the area. We estimated common dolphins in the Alboran Sea could consume more than 16,000 tonnes of fish annually, including ca 7365 (95% CI: 3838-11,639) tonnes of Madeira lanternfish (Ceratoscopelus maderensis), 2,888 (1123-5223) tonnes of bogue (Boops boops), 2770 (879-5270) tonnes of European sardine, 1,850 (170-4116) tonnes of gobies (Gobiidae), and 1497 (65-3352) tonnes of European hake (reference period 2006-2011). Estimated sardine, anchovy and blue whiting consumption was low when compared to the landings in the area, however estimated hake consumption was above the reported hake landings in recent years (393.4 +/- 146 tonnes landed annually between 2006 and 2011). Additionally, direct interactions between common dolphins and main fisheries were evaluated in a total of 111 observed fishing trips (70 in trawlers and 41 in purse seiners) in the area. Although no bycatch of common dolphin was recorded, non-lethal interactions between dolphins and the fishing activity were detected from observations of this on-board observer program. These interactions, together with the high prevalence of stranding with signs of fishing interactions from the study area, may imply an additional threat to this endangered cetacean subpopulation. (C) 2021 Elsevier B.V. All rights reserved.pt_PT
dc.description.sponsorshipCGL2011-25543; SEV-2012-0262; UMS3462; EEBB-I-16-10939pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.rsma.2021.101826pt_PT
dc.identifier.issn2352-4855
dc.identifier.urihttp://hdl.handle.net/10400.1/16809
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationAlgarve Centre for Marine Sciences
dc.subjectPrey consumptionpt_PT
dc.subjectFisheriespt_PT
dc.subjectAlboran Seapt_PT
dc.subjectBycatchpt_PT
dc.subjectTrophic ecologypt_PT
dc.subjectDelphinus delphispt_PT
dc.titleConsumption rates and interaction with fisheries of Mediterranean common dolphins in the Alboran Seapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.citation.startPage101826pt_PT
oaire.citation.titleRegional Studies in Marine Sciencept_PT
oaire.citation.volume45pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMarçalo
person.givenNameAna
person.identifierR-000-JHM
person.identifier.ciencia-id7314-E2C4-78A2
person.identifier.orcid0000-0002-0485-341X
person.identifier.scopus-author-id6505855915
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication7a0927c2-77ac-4512-9dae-a34da3f490e9
relation.isAuthorOfPublication.latestForDiscovery7a0927c2-77ac-4512-9dae-a34da3f490e9
relation.isProjectOfPublicationfafa76a6-2cd2-4a6d-a3c9-772f34d3b91f
relation.isProjectOfPublication.latestForDiscoveryfafa76a6-2cd2-4a6d-a3c9-772f34d3b91f

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