长毛对虾日周摄饵量变化的观察

长毛对虾一天中摄饵量的变化很大。从夜间20:00起到翌晨6:00为全天摄饵最旺盛之时,此段时间的摄饵量占全天的60％以上。其摄饵高峰在夜间24:00到凌晨2:00。8:00及14:00以后摄食量减少,以后又逐渐增多。因此,一天的投饵以4—5次为佳,傍晚到凌晨至少3次,上午近午时1次,午后少投或不投。

Observation on Change of Daily - cyde Food Ration of Penaeus penicillatus

The daily - cycle food ration of P. penicillatus was observed in the trial. The results showed that food intake of the prawn varied greatly within a day. The most active period of the feeding occurved from 8:00 PM to 6:00 AM next morning, the food consumed during this period exceeded more than 60% of total daily ration and this activity peaked from midnight to 2:00 AM Food ration decreased after 8 :00 and 2:00 PM and then increased gradually. Therefore, it is recommended that the better feeding frequency should be 4-5 times per day, especially at least 3 times between dusk and next morning, 1 time near the noon and no or little feeding after that.