Etude de la croissance du naissain d'huitres (Crassostrea gigas, Ostrea edulis) de la métamorphose à la taille de 1 mm. en fonction de différentes nourritures phytoplanctoniques.

Introduction: Among the problems found in mollusc hatcheries, the feeding of growing post larvae is of primary concern. It is therefore essential to reach algal production rationalisation through precise knowledge of the nutritional requirements of the different species of spat produced, and this for a diversity of size classes. Many authors, such as HARTMAN and EPIFANIO (1973), PRUDER and al. (1976), have attempted to establish appropriate food rations in laboratory for various post larvae mollusks according to their average weight. However, it is difficult to adapt those results to hatchery experiments, since raising conditions and yield issues are totally different. The purpose of this work is to determine nutritional rations required for different post larvae sizes and C. giqas as well as 0.edu1is spats in order to obtain optimum growth under hatchery conditions.