Abstract
ABSTRACTThe various problems in culture of oyster larvae are discussed. Oysters can be made to spawn in the laboratory. This is done by subjecting them to a water temperature above 20 C. They can also be encouraged to spawn by adding a sperm suspension to warm sea water. Spawnable animals can be assured for late summer and early fall by holding glycogen‐rich animals in refrigerated sea water during the spawning season. Good water quality is essential. Blooms of algae and pollution are detrimental. Metals such as zinc, are harmful to larvae. Live alga is still the best food but “artificial” feeds must be developed. Disease can be a problem since oysters are crowded. Pathogenic bacteria cause the most problems. Some, such as bacterial necrosis, may be controlled with antibiotics. At metamorphosis abundant food is vital for oysters. If food is inadequate the rate of setting is reduced.
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