饥饿对3种不同规格文蛤耗氧率和排氨率的影响

Effects of starvation on oxygen consumption and ammonia excretion rates of three different sizes of Meretrix meretrix Linnaeus

利用实验生态学的方法研究了饥饿对3种不同规格文蛤（Meretrixmeretrix Linnaeus）耗氧率和排氨率的影响。实验饥饿的时间分别为1，3，5，7，10，13，20，27，35d。实验结果表明，饥饿对3种不同规格的文蛤耗氧率和排氨率都有极其显著的影响（P〈0．01）。3种不同规格的文蛤在饥饿1～7d时，耗氧率随着时间的延长而增大；饥饿7d以后，耗氧率随着时间的延长而下降。3种不同规格的文蛤在饥饿1～10d时，排氨率随着时间的延长而增大；在饥饿10d以后，耗氧率随着时间的延长而下降。在实验周期内，大、中、小3种不同规格的文蛤的0／N值分别为15．05～36．12（平均23．69），15．6～37．56（平均24．73），17．44～47．25（平均27．17）．

Effects of starvation on oxygen consumption and ammonia excretion rates of three different specifications of Meretrix meretrix Linnaeus were studied. The starvation was set for 1, 3, 5, 7, 10, 13, 20, 27 and 35 days. The experimental results showed that the oxygen consumption and ammonia excretion rates were affected by starvation obviously （P〈0.01）. Oxygen consumption rate increased with the increasing time and reached a peak value at the 7th day. After the 7th day, oxygen consumption began to decrease. Ammonia excretion rate increased with the increasing time and reached a peak value at the 10th day. After the 10th day, ammonia excretion rate began to decrease. In the experimental cycle, O/N of large speeifica： tions ranged from 15.05 to 36.12 and the mean was 23.69. The middle ranged from 15.6 to 37.56 and the mean was 24.7a, the small ranged from 17.44 to 47.25 and the mean was 27.17.