水温和体重对污损生物麦秆虫氨氮和磷排泄的影响

室内模拟实验测定了污损生物麦秆虫Caprella sp.在不同温度时的氨氮和活性磷酸盐的排泄特征.活性磷酸盐和氨氮的排泄率分别可表示为0.019　1W-0.236　81.065T和0.009 8W-0.077　01.120　1T.2种营养盐的排泄率均随温度升高而升高，随体重增加而降低.低于10.0 ℃，活性磷酸盐排泄会受低温的限制；在15.0，20.0　℃,活性磷酸盐的排泄率分别是3.566 5 和4.892 6 μg·g^-1·h^-1；麦秆虫附着的养殖设施在夏、秋季节对水体活性磷酸盐的贡献可达14　565.17和1　635.94　mg·m^-2.在0，5.0，10.0,15.0，20.0 ℃,氨氮排泄率分别为0.009　3，0.059　3，1.148　4，2.143　4，2.782　7 μg·g^-1·h^-1；麦秆虫附着的养殖设施在夏、秋季节对水体氨氮的贡献可达到8　283.93，1　302.05 mg·m^-2.

Effects of Water Temperature and Body Weight on Ammonia-Nitrogen and Phosphate Excretion of the Fouling Organism:Caprella sp.

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.