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Gonad maturity induction of spawning larval breeding and growth in the american pearl oyster pteria sterna gould


, : Gonad maturity induction of spawning larval breeding and growth in the american pearl oyster pteria sterna gould. California Fish & Game 77(4): 181-193

Adult specimens of the American pearl oyster (Pteria sterna, Gould) were collected from Bahia de los Angeles, Gulf of California in September 1985. Oysters were brought to spawn after a period of conditioning and after temperature manipulation, were artificially fertilized. Veliger larvae were reared for 32 days at 23.0 22.5, 18.2, and 17.7.degree. C, but metamorphosis was not achieved. In October 1985 young specimens were transplanted to plastic boxes and their growth was studied in situ for a period of 10 months. Their specific growth rate averages 0.10 mm day-1 and was positively correlated with ambient water temperature. Thus, specific growth rate was significantly greater (P < 0.05) during the warm season.

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