中华鲟胚胎的耗氧率

Oxygen Consumption of Chinese Sturgeon(Acipenser sinensis) Embryos

应用密闭定容装置 ,对中华鲟胚胎耗氧率进行了研究。结果对尾部接近心脏时期胚胎 ,在不同水温条件下耗氧率测定表明 ,随水温的升高胚胎耗氧率有上升的趋势。在 1 4℃时 ,耗氧率为 0 69mg 1 0 0eggs·min ;而 2 6℃时 ,耗氧率为 1 63mg 1 0 0eggs·min。中华鲟胚胎耗氧率随发育的进程而增大 ,在水源pH为 6 4、水温为 1 9℃条件下 ,受精卵的耗氧率为 0 2 8mg 1 0 0eggs·min ,而到胚胎心脏形成、搏动期开始耗氧率显著升高 ,为 0 87mg 1 0 0eggs·min,到胚体滚动、出膜期时又是一个高峰期 ,为 1 5 4mg 1 0 0eggs·min。

The oxygen consumption rate of embryos in Acipenser sinensis was measured in closed volumetric flasks under different conditions(50?eggs/285?ml). The results showed that the oxygen consumption rate ascended with increasing water temperature. At 14℃, the oxygen consumption rate was 0.69?mg/100?eggs·min ,while at 26℃, the average rate was 1.63?mg/100?eggs·min. The oxygen consumption of embryos increased with advancing development. Under a condition of pH 6.4 and water temperature 19℃, the oxygen consumption rate of fertilized?eggs was 0.28?mg/100?eggs·min. The oxygen consumption rates were 0.87?mg/100?eggs·min and 1.54?mg/100?eggs·min at the heart formation and beating stage and the embryonic movement and hatching stage, respectively.