胭脂鱼幼鱼的耗氧率及窒息点研究

Study on the Oxygen Consumption Rate and Suffocation Point of Myxocyprinus asiaticus

在自制的可控温密封式流水呼吸室内，对0^＋龄胭脂鱼（Myxocyprinus asiaticus）的耗氧率和耗氧量进行了测定，并对0^＋龄和1^＋龄胭脂鱼的窒息点和窒息过程作了分析。结果显示，平均体重6—7g的0^＋龄胭脂鱼在15℃时的平均耗氧率和耗氧量分别为0．0585mg／（g·h）和0．3567mg／（尾·h）；20℃时的平均耗氧率和耗氧量为0．1176mg／（g·h）和0．8232mg／（尾·h）；昼间耗氧率与夜间耗氧率未显差异。15、20、25和30℃下0^＋龄胭脂鱼的窒息点分别为0．4921、0．8319、0．9356和1．5144mg／L，25和30℃下1^＋龄胭脂鱼的窒息点为1．0738和1．1027mg／L。

In a self- made sealed respiratory chamber in which temperature can be controlled, the oxygen consumption rate and oxygen consumption of 0^＋ years old Chinese sucker（ Myxocyprinus asiaticus ） were measured, and the suffocation point and the suffocation process of 0^＋ and 1^＋ years old fish were analyzed. The results showed that for the 0^＋ years old fish （6 -7 g/ind. ）, the average oxygen consumption rate and oxygen consumption were 0. 0585 mg/（g · h） and 0. 3567 rag/ （ind· h） at 15℃, and 0. 1176 mg/（g · h） and 0. 8232 mg/（ind·h） at 20 ℃ ; there is no difference between daytime and night in average consumption rate, the suffocation point were 0. 4921, 0. 8319, 0. 9356 and 1. 5144 mg/L at 15 ℃, 20 ℃, 25 ℃ and 30 ℃ respectively. 1^＋ years old fish, the suffocation point were 1. 0738 and 1. 1027 mg/L at 25 ℃ and 30 ℃ respectively.