条纹斑竹鲨耗氧率的研究

The Oxygen Consumption Rate of Chiloscyllium plagiosum(Bennett)

对条纹斑竹鲨耗氧率的昼夜变化进行了研究,并对其在不同水温、不同规格条件下的耗氧率和窒息点进行了测定.结果表明:1)条纹斑竹鲨的耗氧率昼夜变化并不明显,但具有明显的高峰和低谷,低谷值出现在02:00和09:00,其平均值为0.110 mg/(g·h),明显低于日平均耗氧率0.213 mg/(g·h);耗氧率高峰期出现在15:00和21:00,其平均值为0.462mg/(g·h),明显高于日平均耗氧率;2)平均体重为99.29 g的条纹斑竹鲨,耗氧量(Yc)和耗氧率(Ycr)随着温度(T)的升高,均呈上升态势,并与水温呈幂函数关系,其关系式分别为:Y:=0.542T1.076,Ycr=2.576 T1.335;3)在水温为22.5～24℃条件下,条纹斑竹鲨的耗氧量(Yc)随体重(W)的增大而增大,耗氧率(Ycr)则相反,随体重增加而减小,但与体重均呈幂函数关系,其关系式分别为:Yc=3.148W0.416,Ycr=3.192 W-0.587;4)在水温为22.5～24℃时,平均体重在50.00～466.50 g的条纹斑竹鲨,其窒息点范围为0.176～0.608 mg/L,而其窒息点与水温的关系并未显示出规律性.

The oxygen consumption rate of Chiloscyllium plagiosum within 24 hours in succession was studied, and the oxygen consumption rates and suffocation points of with different water temperatures and body weights were measured. The results showed： 1） There was no significant difference in oxygen consumption rates of Chiloscyllium plagiosum during day and night. But there existed high points and low points. The low points were about 02 ： 00 and 09 ： 00 （average of 0.108 mg/（g·h））, while the high points about 15 ： 00 and 21 ： 00 （average of 0.462 mg/（g·h））, and the average value of one day was 0.213 mg/（g·h）. 2） With average body weight of 99.29g, the oxygen consumption （Yc） and the oxygen consumption rate （Ycr） of ChiloscyUium = 2.576 plagiosum increased with water temperature rising, the formulas were： Yc = 0.542 T^1.076 and Ycr = T^1.335 respectively. 3） With water temperature of 22.5～24℃, the oxygen consumption of ChiloscyUium plagiosum increased with body weight, while the oxygen consumption rate varied inversely. The formulas were： Yc = 3.148 W^0.416 and Ycr = 3.192 W^-0.587, respectively; 4） The suffocation points were 0.176～0.608 mg/L with body weight of 50.00 to 466.50 g and water temperature of 22.5～24℃. However, the relation between suffocation point and water temperature showed an irregular change.