摘要
本文报道了金鱼的生长率、氨排泄率及磷酸盐排泄率的两个实验的结果。实验A用牛肉作饵料,实验B用配合饲料作饵料。每一实验分6个摄食水平。特定生长率(SGR)与摄食率(R)的关系为:SGR=a十bln(R+1)。实验中两种食物对上式的系数无显著影响。氨排泄率NE与氮摄取率NI的关系为:NE=a+bNI。实验中两种食物对上式的‘b’值无显著影响,但两个实验得出的‘a’值有显著差异。磷酸盐排泄率(PE)与磷摄取率(PI)的关系为:PE=a+bPI。实验中两种食物对上式中的‘b’值无显著影响,但得出的‘a’值有显著差异。若不考虑食物种类的影响,而将两实验数据合并,氮、磷摄取率可分别解释氮、磷排泄率变异的98％和75.7％。
Two experiments were conducted at 20℃ to study the growth rate, ammonia excretion and phosphate excretion by the ornamental goldfish, Carassius auratus (L.). In experiment A, minced beef was used as food. In experiment B, a dry pellet diet was used as food. Fish were tested at six ration levels in each experiment. The relationship between specific growth rate (SGR) and ration (R) can be described by the equation: SGR=a+bln(R+1). When ration was expressed on a dry weight basis, food type did not have significant effects on the coefficients in the above equation. The relationship between ammonia excretion (NE) and nitrogen intake (NI) was: NE=a+bNI. Food type did not have a significant effect on the sope in the above equation, but there was a siginificant difference in the ammonia excretion rate, adjusted for an average rate of nitrogen intake, between the two experiments. The relationship between phosphate excretion (PE) and phosphorus intake (PI) was: PE=a+bPI. Food type did not have a singificant effect on the slope in the above equation, but there was a sinificant difference in the phosphate excretion rate, adjusted for an average rate of phosphorus intake, between the two experiments. Despite the significant differences between the experiments, nitrogen intake and phosphorus intake could explain 98.0% and 75.7%, respectively, of the variance in the ammonia excretion and phosphate excretion in the combined data.
出处
《水生生物学报》
CAS
CSCD
北大核心
1991年第3期200-206,共7页
Acta Hydrobiologica Sinica
基金
中国科学院博士后基金
关键词
金鱼
摄食水平
食物种类
生长
Growth
Nitrogen excretion
Phosphorus excretion
Ration
