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作 者 ：谢小军,孙儒泳

期 刊 ：生态学报 1992年 12卷 3期 页码：J/g·d)随体重(W:g)的增加(8.72—127.4g)而下降,变幅

关键词：鱼类能最学；最大摄食率；耗饵量；体重；温度；南方鲇(Silurus；meridionalis；Chen)；

Keywords:fish energetics, maximum ration level, food consumption, body weight, temperature, Silurus meridionalis Chen.,

摘 要 ：在实验室条件下对南方鲇幼鱼的最大摄食率进行了测定,并探讨了体重和温度等生态因子的影响:在同样的温度(25℃)条件下,最大摄食率(R~(max):J/g·d)随体重(W:g)的增加(8.72—127.4g)而下降,变幅为346.7—267.2J/g·d;二者的相关关系为: R_(max)=496.5W-0.1107。当实验鱼的初始体重相近(41.59—53.39g)时,在温度(T:℃)分别为15,20,25,27.5,30,32.5和35℃的条件下,最大摄食率分别是109.1,253.5,305.8,406.4,426.4,399.0和173.9J/g·d;二者的相关关系为: R_(max)=2692-392.0T+18.92T~2-0.2788T~3通过求导推算极值的方法,得到该种鱼的最佳食欲温度为29.15℃,此时的最大摄食率估计为436.2J/g·d。本文还推导出预测该种鱼在不同体重及不同温度下的最大摄食率模型为: R_(max)(4251-617.0T+29.87T~2-0.4402T~3)W-0.1107

Abstract:The maximum food consumptions in the juvenile catfish imposed on different conditions were measured in the laboratory, and the maximum ration levels were calculated. At temperature of 25℃, the ration level decreased with weight increasing from 8.72 to 127. 4g and ranged from 346.7 to 267.2J/g.d.The correlation between the maximum level(Rmax:.J/g.d)and body weight(W:g)can be expressed as follow .For the fish with the similar initial body weight of 41.59 - 5 3. 39g, the maximum levels were 109, 1,253. 5, 305....

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