Abstract
Juvenile bivalves of five commercially important species ( Tapes philippinarum, T. decussata, Mercenaria mercenaria, Crassostrea gigas and Ostrea edulis) were fed a spray-dried preparation of Tetraselmis suecica. Growth and carbohydrate content of the juveniles were measured and compared with animals fed live T. suecica, a live diatom ( Chaetoceros calcitrans), or a mixture of these two algae. Dry weight growth rate and carbohydrate content were similar for juveniles fed dried or live T. suecica. Growth rate was less and carbohydrate content greater than those for animals fed C. calcitrans or the mixed live diet. Food cell consumption rates of the various diets were compared. In most cases, the weight of each diet eaten was similar for each bivalve species. Preliminary observations on the effect of supplementing the dried diet with live algae show that a mixture containing 20% C. calcitrans gave improved growth.
Published Version
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