The reproductive biology of the two-banded sea bream (Diplodus vulgaris) from the southwest coast of Portugal
2000; Wiley; Volume: 16; Issue: 3 Linguagem: Inglês
10.1046/j.1439-0426.2000.00232.x
ISSN1439-0426
AutoresJorge M.S. Gonçalves, Karim Erzini,
Tópico(s)Reproductive biology and impacts on aquatic species
ResumoJournal of Applied IchthyologyVolume 16, Issue 3 p. 110-116 The reproductive biology of the two-banded sea bream (Diplodus vulgaris) from the southwest coast of Portugal J. M. S. Gonçalves, J. M. S. Gonçalves Universidade do Algarve, Unidade de Ciências e Tecnologias dos Recursos Aquáticos, Campus de Gambelas, Faro, PortugalSearch for more papers by this authorK. Erzini, K. Erzini Universidade do Algarve, Unidade de Ciências e Tecnologias dos Recursos Aquáticos, Campus de Gambelas, Faro, PortugalSearch for more papers by this author J. M. S. Gonçalves, J. M. S. Gonçalves Universidade do Algarve, Unidade de Ciências e Tecnologias dos Recursos Aquáticos, Campus de Gambelas, Faro, PortugalSearch for more papers by this authorK. Erzini, K. Erzini Universidade do Algarve, Unidade de Ciências e Tecnologias dos Recursos Aquáticos, Campus de Gambelas, Faro, PortugalSearch for more papers by this author First published: 09 October 2008 https://doi.org/10.1046/j.1439-0426.2000.00232.xCitations: 48AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Summary The study of the reproduction of Diplodus vulgaris (Geoff.) as part of a base-line study of the fishery resources of the south-west coast of Portugal, was based on the analysis of the spawning season, gonad maturation, size at maturity, fecundity and hermaphroditism. The spawning season is relatively long, from December to March, with peaks in January and February. No significant differences were found either in the sex ratio (M : F = 1.01) over the year or by size. The size at first maturity (L50) for all sexes and undetermined individuals combined was 18.33 cm total length (TL), with no significant differences between males and females. The estimated L50 is considerably greater than the minimum legal size in Portugal of 15.0 cm. Mean absolute fecundity (Fa) was 131 127 oocytes, ranging from 31 523 to 250 608. The relationship between absolute fecundity and total length (TL) (Fa = 25 398 TL – 484 426) and somatic weight (SW) (Fa = 878.8SW – 71 416) was of the linear type. The mean number of oocytes per gram of somatic weight was 526, ranging from 194 to 887. The reproductive strategy of this species is characterized by a rudimentary hermaphroditism with possible protandry, as evidenced by the existence of individuals in sexual transition. Citing Literature Volume16, Issue3June 2000Pages 110-116 RelatedInformation
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