Influence of environmental factors on respiration of excised tissues of American oysters, Crassostrea virginica (Gmelin)

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Abstract
Respiration rates of excised gill, mantle, and adductor muscle of the American oyster, Crassostrea virginica (Gmelin), were measured by the Warburg technique at a number of temperatures and salinities and at various times during the year. Dilution of the seawater medium stimulates gill respiration, has no significant effect on mantle respiration and inhibits adductor muscle respiration. Rate–temperature curves are presented for all three tissues. Respiration rates of gill and mantle declined by about 17% in the autumn, while adductor muscle respiration increased by about 14%. A number of possible explanations for the seasonal changes are discussed.

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