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Principaux aspects de la dynamique d'une population d'Ophiura texturata en Baie de Douarnenez ArchiMer
Guillou, J.; Robert, Rene.
Sampling of Ophiura texturata was carried out during a two year cycle . Demographic structure is obtained using biometric method. The main parameter s of the population are computed . Plurimodal year classes are followed, and the periods of spawning and recruitment are defined . Bathymetric distribution taking into account the seasonal fluctuation is exposed. Segregation of the year classes and cohorts, and variations of their densities are demonstrated.
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Ano: 1979 URL: http://archimer.ifremer.fr/doc/00090/20160/17813.pdf
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Valeur alimentaire de Tetraselmis striata et T. chui pour les larves de Crassostrea gigas ArchiMer
Ponis, Emanuele; Parisi, Guilina; Robert, Rene.
In an attempt to simplify mollusc hatchery-nursery procedures and to provide cost-effective alternative diets, the use of concentrated and preserved microalgae is an alternative to the use of fresh microalgae. Because of their ability for preservation, Prasinophytes appears to be good candidates for remote algal production. In the present work, the food value of fresh and preserved Tetraselmis chui and T. striata for umboned Crassostrea gigas larvae was studied. During the first experiment, fresh T. striata led to the best larval development, but these performances were not confirmed subsequently. When used as monospecific diets the food value of both Prasinophytes is unsufficient to support a good C. gigas larval development. However in bispecific diets a...
Tipo: Text Palavras-chave: Food value; Microalgae; Crassostrea gigas; Tetraselmis chui; Tetraselmis striata; Valeur alimentaire; Microalgues; Crassostrea gigas; Tetraselmis chui; Tetraselmis striata.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-6203.PDF
Registros recuperados: 102
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