Abstract: Phosphate and ammonia-N metabolism characteristics of the fouling organism,Caprella sp. at different water temperature were studied by indoor experiment.Phosphate excretion rate and ammonia-N excretion rate were 0.019 1W-0.236　81.065T and 0.009　8W-0.077　01.120　1T,respectively.They both increased with water temperature while decreased with wet body weight.Under 10.0 ℃,the phosphate metabolism might be restrained by low temperature.At 15.0 and 20.0　℃,phosphate excretion rate was 3.566　5 and 4.892　6　μg·g^-1·h^-1,respectively.Thus,phosphate release rate of fisheries facilities attached by Caprella sp. was estimated as 14　565.17　and　1　635.94 mg·m-2 in the whole summer and autumn.At 0,5.0,10.0,15.0 and 20.0 ℃,the ammonia excretion rate was 0.009　3,0.059　3,1.148　4,2.143　4 and 2.782　7 μg·g^-1·h^-1,respectively.And 8　283.93 and 1　302.05 mg·m^-2 was the ammonia production rate of fisheries facilities in summer and autumn,respectively.

Key words: Caprella sp., ecological effects, metabolism, water temperature, body weight