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Descripción

The study of the reproduction of Diplodus vulgaris (Geoff.) as part of a base-line study of the fishery resources of the southwest 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 (L-50) for all sexes and undetermined individuals combined was 18.33 cm total length (TL), with no significant differences between males and females. The estimated L-50 is considerably greater than the minimum legal size in Portugal of 15.0 cm. Mean absolute fecundity (F-a) was 131 127 oocytes, ranging from 31 523 to 250 608. The relationship between absolute fecundity and total length (TL) (F-a = 25 398 TL-484 426) and somatic weight (SW) (F-a = 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.

Pertenece a

Sapientia Repositório Institucional Universidade do Algarve  

Autor(es)

Gonçalves, J. M. S. -  Erzini, Karim - 

Id.: 69524208

Idioma: eng  - 

Versión: 1.0

Estado: Final

Tipo de recurso: article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: restrictedAccess

Requerimientos técnicos:  Browser: Any - 

Relación: [References] WOS:000087854700004

Fecha de contribución: 10-ene-2017

Contacto:

Localización:
* 0175-8659
* 10.1046/j.1439-0426.2000.00232.x

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Otros recursos de la mismacolección

  1. Age and growth of the bigeye thresher shark, Alopias superciliosus, from the pelagic longline fisheries in the tropical northeastern Atlantic Ocean, determined by vertebral band counts The bigeye thresher, Alopias supercilious, is commonly caught as bycatch in pelagic longline fisheri...
  2. A multi-model approach to evaluate the role of environmental variability and fishing pressure in sardine fisheries Understanding the fluctuations in population abundance is a central question in fisheries. Sardine f...
  3. Weight-length relationships for 54 species of the Arade estuary, southern Portugal P>Weight-length relationships (WLRs) are presented for 54 species sampled by several types of fishin...
  4. Robustness of the Estuarine Fish Assessment Index (EFAI) regarding water body definition criteria According to the Water Framework Directive (WFD) transitional waters should be differentiated accord...
  5. Quantifying recreational shore angling catch and harvest in southern Portugal (north-east Atlantic Ocean): implications for conservation and integrated fisheries management Recreational shore fishing along 250 km of the south and south-west coast of Portugal was studied ba...

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