Study On The Feeding And Metabolize Of Spisula Solidissima

In this paper, feeding, oxygen consumption and excretion of spisula solidissima are studied by histology, scanning electron microscopic and experimental ecology.Effects of concentration, avoirdupois and temperature on filtration rate of Atlantic surfclam. The results indicat that (1) In a relative suitable range filtration rate increased with the concentrations of diet increasing. The relationship between of them shows an exponential function. (2) The relationship between filtration rate and individual size also shows an exponential function. (3) Filtration rate increased with higher temperature but decreased if the temperature exceeded 21℃.Effects of temperature, salinity and starvation on oxygen consumption and ammonia excretion rates of Atlantic surfclam are studied. The experimental results are as follows: (1)The oxygen consumption and ammonia excretion rates are significantly affected by temperature(P<0.01).Both of them increased with the increasing temperature, and the oxygen consumption rates reach peak value at 22℃,The ammonia excretion rates continuously increase from 6℃to 25℃. O/N ranges from 9.01-19.24 and reaches peak at 16℃. (2) The oxygen consumption and ammonia excretion rates are affected by salinity significantly(P<0.01).Under the test salinity (13-49), the oxygen consumption and ammonia excretion rates increase with the increasing salinity and reach peak value at 43, then begin to decrease. O/N ranges from 16.14-39.72. (3) The oxygen consumption rates of Atlantic surfclam are affected by starvation obviously(P<0.01). Oxygen consumption rates increase with the increasing time and reach peak value at the 7th day; after 7th day, oxygen consumption ratesbegin to decrease. The ammonia excretion rates of Atlantic surfclam are affected by starvation obviously(P<0.01). Ammonia excretion rates increase with the increasing time and reach peak value at the 5th day; after 5th day, ammonia excretion rates begin to decrease. O/N ranges from 17.05～34.18 and the mean is 21.1.