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The use of caudal thorns for ageing Raja undulata from the Portuguese continental shelf, with comments on its reproductive cycle

2007Journal article Restricted access
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dc.contributor.authorMoura, Teresa
dc.contributor.authorFigueiredo, Ivone
dc.contributor.authorFarias, Inês
dc.contributor.authorSerra-Pereira, Bárbara
dc.contributor.authorCoelho, Rui
dc.contributor.authorErzini, Karim
dc.contributor.authorNeves, Ana
dc.contributor.authorGordo, Leonel Serrano
dc.date.accessioned2016-12-23T11:18:20Z
dc.date.available2016-12-23T11:18:20Z
dc.date.issued2007
dc.description.abstractThe present study focuses on age estimation, with reproductive information contributing to the better understanding of the growth and the biology of Raja undulata. In the age and growth study, two calcified structures were used: caudal thorns and central vertebra. Results of readings showed that there were no significant differences in age estimates between the two structures. Both von Bertalanffy and Gompertz growth models were fitted to size-at-age data by sex and geographical area. No significant differences were found between sexes for the two models but significant differences were found between geographical areas ( P = 0.05). The Gompertz growth function was selected as the best model to describe R. undulata growth because it presented the best fit and the most reasonable biological estimates. Reproductive analysis indicates one annual breeding season for R. undulata. The differences found in the estimates of length at first maturity between geographical areas (TL50% = 838 mm in Peniche and 762 mm in Algarve for females and TL50% = 781 mm in Peniche and 736 mm in Algarve for males), together with the regional differences found between growth parameters estimates ( P = 0.05), may reflect the existence of different local populations of R. undulata on the Portuguese continental shelf.
dc.identifier.doi10.1071/MF07042
dc.identifier.issn1323-1650
dc.identifier.otherAUT: KER00534; RMS01092;
dc.identifier.urihttp://hdl.handle.net/10400.1/8903
dc.language.isoeng
dc.peerreviewedyes
dc.publisherCSIRO Publishing
dc.relation.isbasedonWOS:000251311100001
dc.titleThe use of caudal thorns for ageing Raja undulata from the Portuguese continental shelf, with comments on its reproductive cycle
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage992
oaire.citation.issue11
oaire.citation.startPage983
oaire.citation.titleMarine And Freshwater Research
oaire.citation.volume58
person.familyNameCoelho
person.familyNameErzini
person.givenNameRui
person.givenNameKarim
person.identifier134638
person.identifier.ciencia-idDC1A-20B7-EAC0
person.identifier.ciencia-idD917-7133-341A
person.identifier.orcid0000-0003-3813-5157
person.identifier.orcid0000-0002-1411-0126
person.identifier.ridC-1163-2008
person.identifier.ridM-5216-2013
person.identifier.scopus-author-id56257111100
person.identifier.scopus-author-id7004015948
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isAuthorOfPublicatione20f0e2d-3085-4c37-9e98-260dc9faddea
relation.isAuthorOfPublication.latestForDiscoverye20f0e2d-3085-4c37-9e98-260dc9faddea

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