采用流水法研究了在温度(20.7±0.55)℃下体重和时间节律对俄罗斯鲟(Acipenser gueldenstaedti Brandt)幼鱼耗氧率和窒息点的影响.结果表明,俄罗斯鲟的耗氧率、窒息点与体重负相关,耗氧量与体重正相关.俄罗斯鲟体重(1.39±0.24)g时平均耗氧率为(0.51±0.06) mg/h·g,平均耗氧量为(0.68±0.03) mg/h·ind；体重(3.16±0.22)g时,平均耗氧率为(0.35±0.04) mg/h·g,平均耗氧量为(0.97±0.10) mg/h·ind;体重(6.20±0.36)g时平均耗氧率为(0.28±0.04) mg/h·g,平均耗氧量为(1.46±0.33)mg/h·ind.3种规格俄罗斯鲟的窒息点分别为2.38、2.35和1.98 mg/L.%The influence of body weight and time rhythm on the oxygen consumption rate and suffocation point of juvenile Acipenser gueldenstaedti Brandt were studied by using the method of running water at temperature of 20.7 ±0.55℃.The results showed that the oxygen consumption rate and suffocation point of A.gueldenstaedti negatively correlated with body weight.The oxygen consumption was positively correlated with weight.At body weights of 1.39 ± 0.24,3.16 0.22 and 6.20 0.36 g,the average oxygen consumption rates of A.gueldenstaedti were 0.57 0.11,0.32 0.06 and 0.28 0.05 mg/h · g,respectively.And the average oxygen consumptions were 0.68 0.14,1.00 0.18 and 1.59 0.34 mg/h · ind.,respectively.The suffocation points of three standard of A.gueldenstaedti were 2.38,2.36 and 2.98 mg/L,respectively.
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