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Abundance dynamics of a new, endemic batoid from Brazil: The Lutz’s stingray, Hypanus berthalutzae

2021Journal article Restricted access
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dc.contributor.authorBranco-Nunes, Ilka
dc.contributor.authorNiella, Yuri
dc.contributor.authorHazin, Fábio Hissa Vieira
dc.contributor.authorCreio, Emmanuelly
dc.contributor.authorOliveira, Paulo Guilherme Vasconcelos de
dc.contributor.authorAfonso, André Sucena
dc.date.accessioned2021-11-16T17:00:31Z
dc.date.available2021-11-16T17:00:31Z
dc.date.issued2021
dc.descriptionAcknowledgments : The authors are thankful to the crew of R.V. Sinuelo and R.V. Pedrinho and to all interns from the Laboratório de Tecnologia Pesqueira at the Universidade Federal Rural de Pernambuco (LATEP/UFRPE) for assisting with field work. This work was funded by the State Government of Pernambuco, Brazil. IBN sincerely thanks FACEPE - Fundação de Amparo a Ciência e Tecnologia do Estado de Pernambuco for her PhD and postdoctoral fellowship. Funding to YN through an International Macquarie University Research Training Program scholarship is deeply acknowledged. ASA acknowledges funding provided by CAPES – Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES BJT-1049/2013) and by FCT – Fundação para a Ciência e Tecnologia (UID/MAR/04292/2013).
dc.description.abstractThe Lutz’s stingray, Hypanus berthalutzae, is a recently identified, endemic dasyatid species which occurs in shallow habitats exclusively along most of the Brazilian coast. It is frequently caught as bycatch in different fisheries throughout the range of its distribution, but information on population trends and the impacts of fishing is still scarce. Therefore, this study aimed to describe the structure and dynamics in H. berthalutzae relative abundance off Recife, Northeast Brazil, in order to provide baseline data for species management. H. berthalutzae were caught and sampled in a fisheries-independent, standardized longline and drumline survey which used > 500,000 hooks during ∼11 years. H. berthalutzae catch composition (N = 86) was characterized by a striking predominance of females, with a female:male ratio of 16:1. Most of these individuals measured were considered to be mature. H. berthalutzae catch rates were largely reduced after hooks previously operating directly on the seafloor were suspended in the middle of the water column. Such an effect was included in a zero-inflated generalized additive model developed to assess spatiotemporal and environmental modulators of H. berthalutzae abundance, for which both month and lunar phase proved to be statistically significant predictors. A higher abundance of H. berthalutzae was observed in the rainy season, from March to July (χ2= 19.22; p < 0.001), as well as during full moon periods (Z = 2.38; p = 0.017). The effects of other candidate predictors such as sampling site or year were either nonexistent or superimposed by other more deterministic factors. The results achieved in this fully standardized survey depict the dynamics in adult H. berthalutzae which might be expected to occur in coastal habitats off northeastern Brazil, thus providing a solid contribution to improve the management of local artisanal fisheries towards the recovery and sustainability of H. berthalutzae populations across their range.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationIlka Branco-Nunes, Yuri Niella, Fábio Hissa Vieira Hazin, Emmanuelly Creio, Paulo Guilherme Vasconcelos de Oliveira, André Sucena Afonso, Abundance dynamics of a new, endemic batoid from Brazil: The Lutz’s stingray, Hypanus berthalutzae, Regional Studies in Marine Science, Volume 48, 2021, 102059, ISSN 2352-4855, https://doi.org/10.1016/j.rsma.2021.102059pt_PT
dc.identifier.doihttps://doi.org/10.1016/j.rsma.2021.102059pt_PT
dc.identifier.issn2352-4855
dc.identifier.urihttp://hdl.handle.net/10400.8/6333
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCPUEpt_PT
dc.subjectDasyatidaept_PT
dc.subjectElasmobranchpt_PT
dc.subjectFisheries-independentpt_PT
dc.subjectLonglinept_PT
dc.subjectZIGAMpt_PT
dc.titleAbundance dynamics of a new, endemic batoid from Brazil: The Lutz’s stingray, Hypanus berthalutzaept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMAR%2F04292%2F2013/PT
oaire.citation.titleRegional Studies in Marine Sciencept_PT
oaire.citation.volume48pt_PT
oaire.fundingStream5876
person.familyNameAfonso
person.givenNameAndré
person.identifier.ciencia-idB513-502C-1865
person.identifier.orcid0000-0001-9129-278X
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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