条纹石鮨摄食强度与代谢及能量收支间的关系

设日摄食率为０．４％、１．５％、４．０％三种水平，分别测定条纹石鱼旨Ｍｏｒｏｎｅｓａｘａｔｉｌｉｓ幼鱼的代谢及能量的收支情况。处于饱食（日摄食率４．０％）及维持状态（日摄食率１．５％）下，该鱼代谢率增加的峰值分别于摄食后３ｈ及７ｈ内出现，为静止时代谢水平的２．１０倍和２．４６倍，ＳＤＡ（特殊动力作用）持续时间均为２１ｈ，ＳＤＡ总耗能量分别占摄入能的１３％和３５．８％。条纹石鱼旨在饱食时的转化效率Ｋ（湿重）为２０．８５％。三种摄食水平下条纹石鱼旨的能量收支方程分别为：饱食状态（日摄食率４．０％）时，１００Ｃ＝８．４Ｆ＋７．８Ｕ＋１３．０ＳＤＡ＋３６．９（Ｒｓ＋Ｒａ）＋３３．９Ｇ；维持状态（日摄食率１．５％）时，１００Ｃ＝７．８Ｆ＋４．１Ｕ＋３５．８ＳＤＡ＋５２．３（Ｒｓ＋Ｒａ），其中Ｇ＝０；减重状态（日摄食率０．４％）时，（Ｆ＋Ｕ＋Ｒ）／（Ｃ＋Ｐ１）＝６７．３％，其中Ｃ＋Ｐ１＝１４．４Ｃ＋８５．６Ｐ１，Ｆ＋Ｕ＋Ｒ＝１．８Ｆ＋８．１Ｕ＋５７．４Ｒ。

Relation of Feeding Levels to Metabolism and Energy Budget of Striped Bass ( Morone saxatilis Walabum )

With young striped bass ( Morone saxatilis, Walbaum ) as the testing object , we have studied its metabolism and energy budget in different feeding levels ( with small, live Pseudorasbora bleeder as diet and the daily feeding ration was designed at 0.4 %, 1.5 %, 4.0% seperately ). Under the condition of saturation feeding ( 4.0% ration ) and maintenence feeding ( 1.5% ration ), the peak of increased metabolism rate of the striped bass appeared in 3 hours and in 7 hours after feeding , which was 2.10 times and 2.46 times seperately of that in motionless status. SDA ( specific dynamic action ) main rained for 21 hours samely, and SDA total energy consumed accounted for 13% and 35.8% respectively of the energy in taken; the conversion rate K ( wet weight ) of striped bass was 20.85% in saturation feeding. The equation of energy budget of the fish in 3 feeding ration levels were as follows: under saturation feeding condition with a ration of 4.0%: 100 C = 8.4 F 7.8 U 13.0 SDA 36.9 ( Rs Ra ) 33.9 G under maintenence feeding condition with a ration of 1.5%: 100 C = 7.8 F 4.1 U 38.5 SDA 52.3 ( Rs Ra ), where G = 0 under weight decreasing condition with a ration of 0.4%: ( F U R )/( C P 1 ) =67.3% where C P 1 = 14.4 C 85.6 P 1 F U R = 1.8 F 8.1 U 57.4 R