Abstract
Four species of algae were tested for their food value to the larvae of Crassostrea gigas. Chaetoceros calcitrans resulted in the fastest growth rate and Pyramimonas virginica was nearly as good a food in some trials. Pseudoisochrysis paradoxa was a poor food, and Isochrysis galbana was an intermediate food value. Growth on C. calcitrans was equal to or occasionally better than growth on a mixed diet of C. calcitrans and I. galbana. A relationship between length and dry weight of the larvae of C. gigas is presented.

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