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日本对虾(Penaeus japonicus)稚虾(1.23±0.09g)置于对照组和5、10、20和30mg/L总氨-N(NH3-N+NH_4~+-N)中,在盐度34ppt海水中,pH=8.21和t=25.5℃培养60d后其死亡率分别为:0、6.7%、26.7%、70.0%和86.7%.对虾置于10、20和30mg/L总氨-N中培养40d后其生长明显比对照组低(P<0.05).在5、10、20和30mg/L总氨-N中培养60d后,对虾增重和增长的百分数分别为125(对照组)、90、70、43、39和28(对照组)、22、18、14、11.氨对体重的影响比体长更为明显.对于增重,60d的EC50(50%对虾减少生长的浓度)是总氨-N19.88mg/L(NH_3-N为1.39mg/L);对于体长的增加,60d的EC50是总氨-N23.86mg/L(NH_3-N为1.67mg/L).MATC(最大客许毒性浓度)对30d和50d分别是5mg/L和小于5mg/L总氨-N(0.35mg/L和不足0.35mg/LNH_3-N).氨增加了对虾的蜕皮频率.对虾置于对照组和5,10,20和30mg/L总氨-N中,第一次到第二次蜕皮间隔时间分别为21.9、19.2、17.7、14.6和10.3d.
Penaeus japonicus juveniles (1.23 ± 0.09g) were placed in control and 5, 10, 20 and 30 mg / L total ammonia -N (NH3-N + NH4 + The mortality rates were 0,6.7%, 26.7%, 70.0% and 86.7% after 60 days of culture at pH = 8.21 and t = 25.5 ℃, respectively.Prawfish were cultured in total ammonia-N at 10, 20 and 30 mg / (P <0.05) .When cultured for 60 days in 5, 10, 20 and 30 mg / L total ammonia-N, the percentages of gain and increase of shrimp were 125 (control group), 90 70, 43, 39, and 28 (control), 22, 18, 14, and 11. The effect of ammonia on body weight was more pronounced than body length. For weight gain, the EC50 at 60 days (50% reduction in the concentration of shrimp) Ammonia-N 19.88 mg / L (NH3-N 1.39 mg / L); for body length increase, the EC50 for 60 days was total ammonia-N 23.86 mg / L Guest toxic concentrations) were 5 mg / L and less than 5 mg / L total ammonia-N (0.35 mg / L and less than 0.35 mg / LNH 3-N) for 30 and 50 days, respectively.Ammonia increased the molting frequency of shrimp Groups and 5, 10, 20, and 30 mg / L total ammonia-N, the first to second molting interval was 21.9, 19.2, 17.7, 14.6 and 10.3 d, respectively.