Data/hora: 10/06/2024 04:47:05

Provedor de dados: | 5
País: | France
Título: | Etude comparative du cycle de reproduction de la palourde Ruditapes decussatus en milieu naturel (sud Tunisie) et contrôlé (écloserie)
Autores: | Hamida, Leila; Medhiouband, Mohamed; Cochard, Jean-claude; Romdhane, Mohamed; Le Pennec, Marcel.
Data: | 2004-10
Ano: | 2004
Palavras-chave: | Ruditapes; Natural conditions; Hatchery; Reproduction; Gonatic activity; Gametogenesis.
Resumo: | A comparative study of the reproductive cycle of Ruditapes decussatus under natural (South of Tunisia) and controlled conditions (hatchery). The aim of this study was to describe and compare the gametogenic activity of Ruditapes decussatus in situ and in hatchery. Criteria of maturity were characterized and the positive role of conditioning in the success of artificial reproduction was underlined. Specimens sampled in the South of Tunisia were conditioned at the experimental station of Monastir (Tunisia). The parameters studied were the variation of the condition index and the frequency distribution of oocyte diameters. Results showed that the reproductive cycle was continuous in situ. Gametogenesis started in January and February. Gonadic activity increased from March to November-December. Spawning events occurred irregularly from June to December. In winter conditioning, mature oocytes were produced from March and spawning began in April. The increase in temperature and food abundance shortened the gametogenesis duration; ripe gametes were produced two months earlier compared to natural environment. In summer conditioning, the reproductive cycle was the same as that in the natural site, maturation and spawning occurred simultaneously.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/2004/publication-882.pdf
Editor: | Station Biologique de Roscoff
Relação: | http://archimer.ifremer.fr/doc/00000/882/
Formato: | application/pdf
Fonte: | CBM - Cahiers de Biologie Marine (0007-9723) (Station Biologique de Roscoff), 2004-10 , Vol. 45 , N. 4 , P. 291-303
Fonte: | 2004 CBM