Abstract
Spat of five species of commercially cultivated bivalve molluscs were reared in 50-l recirculating sea water systems. They were held in one of three feeding regimes: a live algal diet, a microencapsulated artificial diet, and not fed. Dry weight growth rates of oyster and clam spat fed the artificial diet were up to 54% and 64%, respectively, of the rates with the algal diet. Unfed spat showed almost no growth. Substitution of the microencapsulated diet with 40% and 15% by weight of algae for oysters and clams, respectively, gave growth similar to that with the algal control diet.
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