Age and growth of the threatened endemic skate Rioraja agassizii (Chondrichthyes, Arhynchobatidae) in the western South Atlantic

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dc.contributor.authorCaltabellotta, F. P.
dc.contributor.authorSilva, F. M.
dc.contributor.authorMotta, F. S.
dc.contributor.authorGadig, O. B. F. [UNESP]
dc.contributor.institutionUniv Florida
dc.contributor.institutionFundacao Univ Fed Rio Grande
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-04T12:33:33Z
dc.date.available2019-10-04T12:33:33Z
dc.date.issued2019-01-01
dc.description.abstractThe Rio skate Rioraja agassizii is a threatened endemic skate species frequently caught as bycatch in the western South Atlantic. However, there is no biological information about its age and growth parameters, which would be necessary to provide science-based information for the development of management strategies for this species. The aim of the present study was to provide information about the age and growth parameters of R. agassizii. In all, 138 vertebrae from individuals ranging in size from 9.0 to 53.2-cm total length (TL) were analysed. The edge analysis indicated a trend for annual band deposition in the vertebrae. Maximum ages estimated for males and females were 6 and 10 years respectively. Akaike's information criterion indicated that the modified two-parameter form of the von Bertalanffy growth function (using length at birth L-0 = 9.0 cm TL) provided the best fit, with derived parameters of theoretical maximum length L-infinity = 49.6 cm TL and growth coefficient k = 0.27 for males and L-infinity = 59.0 cm TL and k = 0.22 for females. Our results are important to understanding the resilience of this skate species to harvest, which can contribute to the development of fisheries management strategies and conservation programs.en
dc.description.affiliationUniv Florida, Florida Museum Nat Hist, Florida Program Shark Res, 1659 Museum Rd, Gainesville, FL 32611 USA
dc.description.affiliationFundacao Univ Fed Rio Grande, Inst Oceanog, Lab Ecol Paisagem Costeira, Ave Italia Quilometro 8, BR-96201900 Rio Grande, RS, Brazil
dc.description.affiliationUniv Fed Sao Paulo, Inst Mar, Lab Ecol & Conservacao Marinha, Rua Dr Carvalho de Mendonca,144 Encruzilhada, BR-11070100 Santos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Lab Pesquisa Elasmobranquios, Campus Litoral Paulista, BR-11380972 Sao Vicente, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Lab Pesquisa Elasmobranquios, Campus Litoral Paulista, BR-11380972 Sao Vicente, SP, Brazil
dc.format.extent84-92
dc.identifierhttp://dx.doi.org/10.1071/MF18010
dc.identifier.citationMarine And Freshwater Research. Clayton: Csiro Publishing, v. 70, n. 1, p. 84-92, 2019.
dc.identifier.doi10.1071/MF18010
dc.identifier.issn1323-1650
dc.identifier.urihttp://hdl.handle.net/11449/185215
dc.identifier.wosWOS:000453226400008
dc.language.isoeng
dc.publisherCsiro Publishing
dc.relation.ispartofMarine And Freshwater Research
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectfisheries management
dc.subjectpopulation dynamics
dc.subjectRajiformes
dc.titleAge and growth of the threatened endemic skate Rioraja agassizii (Chondrichthyes, Arhynchobatidae) in the western South Atlanticen
dc.typeArtigo
dcterms.rightsHolderCsiro Publishing

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