EFFECTS OF TEMPERATU-RE ON OXYGN CONSUMPTION AND AMMONIA-N EXCRETION OF CHLAMYS FARRERI

of temperature on oxygen consumption rate (OCR) and ammonia-N excretion rate of scallop Chlamys farreri (1.7-6.2 cm in shell height) were studied in laboratory from Dec. 30 1996 to Jan. 28, 1997 . Under the controlled conditions of ambient water temperature 10-31℃ and salinity 32, the concentrations of dissolved oxygen and ammonia-N were determined by the Winkle method and the hypobromite method , respectively . Results showed that the OCR ranged from 1.20 mg/g (DW). h to 5.76mg/g (DW). h. The OCR increased with temperature from 10℃ to 23℃, but at 28℃ the OCR of mature individuals decreased, and that of different size scallops reduced at 31℃. The ammonia-N excretion rate ranged from 113.13 μg NH4-N/g (DW). h to 486.63 μg NH4 -N/g (DW). h,and increased with temperature from 10℃ to 31℃.