||Reproduction and recruitment of Cerastoderma edule (L.) at Saint-Pol-de-Leon (North Brittany).
||Communication avec actes
||Guillou J1, Tartu C1
||(8. Natl. Congr. of the French Malacological Society): Aspects Recents de la Biologie des Mollusques, Brest (France), 7-8 Nov 1990
||Actes de colloques. Ifremer. Brest [ACTES COLLOQ. IFREMER.]. 1991
||Cerastoderma edule, Bivalvia, Marine molluscs, Temperature effects, Recruitment, Seasonal variations, Sexual maturity, Reproductive cycle, Spawning, Sexual reproduction
|Résumé en anglais
||Investigation on the recruitment of Cerastoderma edule was carried out at St-Pol-de-Leon over three years. This approach is intended to disclose in the fluctuations of recruitment the part of variability linked with reproduction and spawning. Stages of sexual maturity are used together with a condition index. The reproductive activity spread out over the most part of the year, ripe individuals being observed even in winter. Main spawning took place in summer and autumn. Seasonal and interannual fluctuations of recruitment are associated with the variations of the condition index. An increase of the reproductive activity could be observed between 1987 and 1989 related with temperature. It is shown that this factor is the main responsible of the variations of recruitment.