投喂频率对鳡幼鱼摄食及生长的影响

研究了不同投喂频率(1次/d,2次/d,3次/d,4次/d)对鳡(Elopichthys bambusa)幼鱼摄食及生长的影响,试验持续30 d。结果显示:投喂频率从1次/d增加到4次/d,鳡幼鱼的摄食率逐步提高,1次/d组的摄食率显著低于其他组(P<0.05);体重增加率、特定生长率有不同程度增高,在3次/d时达到最高;饲料转化率逐次下降,1次/d组显著高于其他组(P<0.05)。随着投喂频率增加,实验各组组内个体体重差异显著下降,鳡的规格趋于整齐,组间每日摄食表现也各不相同。试验表明:鳡的生长受投喂频率的影响,每天投喂3次是鳡养殖的最佳投喂频率。

Effect of Feeding Frequency on Feeding and Growth of Juvenile Elopichthys bambusa

The effects of four different feeding frequencies(1,2,3 or 4 times per day)on the feeding rate and growth of juvenile Elopichthys bambusa were studied in a 30 days trial.The results showed that: feeding rate increased with the increasing of feeding frequency,the group which was feed 1 time daily was the lowest and significantly different from other groups(P<0.05).When feeding frequency increased,body weight gain ratio and specific growth rate also increased,and both of them reached the highest when feeding 3 times daily.However,feed conversion efficiency decreased when frequency increased,the highest occured in 1 time daily group(P<0.05).With the gradually increasing of feeding frequency from once daily to 4 times daily,individual differences of fish body weight dwindled down,fish size became more equirotal,daily feeding amount also changed accordingly.Therefore it indicated that the growth performance was affected by feeding frequency,and feeding 3 times daily was the optimum.