Abstract: In this study,the effects of temperature,salinity,pH,and body weighton oxygen consumption rate and ammonia excretion rate were studied in rock scallop Crassadoma gigantea introduced in 2013 to provide the basis for study of the physiological ecology of the scallop and the guidance to production practice.The results showed that oxygen consumption rate and ammonia excretion rate in juvenile rock scallop were significantly affected by tempera-ture,salinity,pH,and body weight(P<0.01),increased with the rise of temperature within 6-22益.The regres-sion analysis revealed that relationship between body weight(X)and oxygen consumption rate or ammonia excretion rate(Y)was expressed as negative exponential relationship.The oxygen consumption rate and ammonia excretion rate per unitbody weightwere decreased with the increase in bodyweight,and increased with the increase in salin-ity from 24 to 30,themaximum at salinity of30,and then decreased with the increase in salinity from 30 to 36;in-creased with the increase in pH from 7.0 to 8.0,themaximum at salinity of 8.0,and then decreased with the in-crease in salinity from 8.0 to 9.0.The peak of oxygen consumption rate and ammonia excretion rate were observed at13:00,theminimal oxygen consumption rate at 21:00 and the minimal ammonia excretion rate at 1:00.The findings provide reference with physiological and ecological research in rock scallop.
2017, Vol. 32 
