卷口鱼耗氧规律的研究

Oxygen consumption performance of Ptychidio jordani

卷口鱼(Ptychidio jordani)的耗氧量随着体重的增长而增加,关系式为y=0.3539X0.5646.耗氧率却随着体重的增长而减少,关系式为y=0.3519X-0.4340.水温和水流量对耗氧率都有影响.在一定水温范围内,耗氧率随着水温的上升而增加,关系式为y＝0.0038X12'1,水温24～30℃时耗氧率变幅较小,24℃以下、30℃以上时耗氧率变幅较大.在一定的水流量范围内,耗氧率随着流量的增大而增加,关系式为y=0.0012X0.5086.卷口鱼的呼吸耗氧率存在较明显的昼夜变化,耗氧高峰出现在每日10:00～13:00和20:00～23:00,白天的耗氧率均大于晚上.

The oxygen consumption(Y) , expressed by mg/fish·h, increases gradually withincrease in body weight(X) as the equation Y = 0. 3539X0.5646. The oxygen consumption rate,measured in mg/ (g·h) , decreases gradually with increase in body weight and was shown by Y= 0.3519X-0.4340. There are effects of water temperature and water flow on oxygen consump-tion. The oxygen consumption rate increases with the increase in temperature in certain range ofwater temperature, Y= 0.0038X1.2711; The oxygen consumption rate increases with the increasein water flow in certain range of flow,Y=0.0012X0.5086. There is a significant rhythm in oxy-gen consumption in day and night. Average oxygen consumption is greater in day than that atnight.