Data/hora: 08/06/2024 19:07:32

Provedor de dados: | 5
País: | France
Título: | Intensive culture of the Manila clam (Ruditapes philippinarum) in marine ponds. The impact of rearing densities and feeding levels on growth rates and yields
Autores: | Baud, Jean-pierre; Haure, Joel; Bodoy, Alain.
Data: | 1992
Ano: | 1992
Palavras-chave: | Ruditapes philippinarum; Skeletonema costatum; Elevage intensif; Marais maritime; Croissance; Rendement; Ruditapes philippinarum; Skeletonema costatum; Intensive rearing; Marine pond; Growth rate; Yield.
Resumo: | Intensive ongrowing (from 28 mm to the commercial size, 35 mm) of the Manila clam Ruditapes philippinarum was studied in experimental raceways with a natural bottom of clay. The factors controlled were rearing density (100, 200, and 300 individuals/m2) and food concentration (34.0 and 68.1 µg.1-1 chlorophyll a). Food was produced from a batch culture of Skeletonema costatum in a large volume (50 m3), thanks to the fertile ground and saline water. Best results regarding final size were obtained in the vicinity of the inflow with a densilY of 100 individuals/m2. However it was a density of 300 individuals/m2 which appeared from the following results to be the optimal choice for intensive rearing: the survival rate was 84 %, the final biomass was 4 kg/m2 and the food chain efficiency was 0.16. Production was ten times higher than that which has usually been obtained in these marine ponds, by means of extensive culture. The design of the hydraulic system and the raceways needs to be improved though, for they induced some changes in growth rates, related to the distance from the water inflow.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/00038/14950/12276.pdf
Editor: | Institut océanographie
Relação: | http://archimer.ifremer.fr/doc/00038/14950/
Formato: | application/pdf
Fonte: | Océanis (0182-0745) (Institut océanographie), 1992 , Vol. 18 , N. 1 , P. 121-132
Fonte: | 1992 Institut océanographie