影响牙鲆幼鱼摄食的环境因素实验研究

STUDY ON THE ENVIRONMENT FACTORS INFLUENCING THE FEED RATE OF Paralichthys olivaceus

在不同环境条件下，观察体长３～６ｃｍ，体重０．２３～２．７５９牙鲆幼鱼的摄食情况，摄食率最高时环境条件为最适。

Feed rate of L: 3-6cm Paralichthys olivaceus (W: 0. 23-2. 75g) under various conditions is studied. The highest feed rate occurs when the illumination is 500-1 500 lux, water temperature is 18-24℃,salinity is 18-34,pH is 7. 5-8. 6 and DO>4. 5mg/L. NH4-N<O. 03mg/L. P. olivaceus feeds occurs mainly in daytime. There are two peaks of feed rate value occurring at down and twilight. Daily feed rate normally averages 5. 4-5. 8%, and relatively increasing the frequence of feeding will keep it at high level.