网具运动对美国红鱼摄食、栖息行为影响的研究

主要研究刚性网箱模型和单片网具的摆动频率及摆动幅度对美国红鱼摄食、栖息行为的影响。试验结果表明:在刚性网箱试验中,幅度和转速的变化对美国红鱼的摄食和栖息都有影响。随着幅度的增大,美国红鱼摄食完成需要的时间延长;转速越小,对美国红鱼摄食的影响越小,摄食完成需要的时间越短;在低转速的条件下,美国红鱼运动缓慢,随着转速的增大,美国红鱼开始活跃,最后基本位于中上层游动。在单片网具试验中,随着网具转速的加快,美国红鱼完成摄食的时间延长;试验中美国红鱼基本位于单片网具的左侧游动。

The Studies of Seacage-net Movement on Feeding and Inhabiting Behaviors of Sciaemops ocelletus

In this paper,the effects of swing frequencies and scopes of rigid seacage-model and single seacage-net on feeding、inhabting of Sciaemops ocelletus were studied.The results showed:In the experiment of rigid seacage-model,the changes of frequencies and scopes had certain effects on Sciaemops ocelletus.The consuming time was prolonged with the scopes enlarged;low frequencies had little effect on the feeding,so the feeding time was shortened;and Sciaemops ocelletus had less activities under low frequencies,more activities under the higher frequencies,and lied in middle-superstratum.In the experiment of single seacage-net,the feeding time was prolonged with the higher frequencies; and Sciaemops ocelletus lied in the left side during the whole experiment.