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Hidrobiológica

versão impressa ISSN 0188-8897

Resumo

YAMUZA-CLAVIJO, María Pilar; RUA FRANCH, Ana Rodríguez  e  BRUZON-GALLEGO, M. Ángeles. Gametogenic Cycle of Venerupis rhomboides Pennant, 1777 on Andalusian Coast (South Spain). Hidrobiológica [online]. 2010, vol.20, n.3, pp. 195-202. ISSN 0188-8897.

Knowledge of the reproductive biology of a species is essential for fishery management and for its culture. However, there are no previous studies in Andalusia regarding the determination of the gametogenic cycle of Venerupis rhomboides. The aim of this paper was to determine the sex ratio of a Mediterranean population of this species, to describe the gametogenic cycle using histological techniques and the condition index and to determine the relations with temperature and chlorophyll a levels. The sex-ratio was 1:1 (χ2 = 0.724; p> 0.25). Spawning and post-spawning specimens were observed throughout this study, with the highest peak in april. The condition index did not reflect exactly the reproductive activity of V. rhomboides. One possible explanation was the asynchronous character of the population. The more or less constant temperature, and the variations of chlorophyll a, did not seem to be limiting for gonadal maturation and spawning over the whole annual cycle.

Palavras-chave : Venerupis rhomboides; gametogenic cycle; spawning; condition index; histology.

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