Fu Shi-Jian, Cao Zhen-Dong, Peng Jiang-Lan
Laboratory of Evolutionary Physiology and Behaviour, College of Life Sciences, Chongqing Normal University, 400047, Chongqing, China.
J Comp Physiol B. 2006 Jun;176(5):489-95. doi: 10.1007/s00360-006-0070-2. Epub 2006 Feb 14.
The effect of relative meal size (0.5-24% body mass) on specific dynamic action (SDA) was assessed in Chinese catfish (Silurus asotus Linnaeus) (30.90+/-1.30 g) at 25.0 degrees C; the cutlets of freshly killed loach without viscera, head and tail were used as a test meal. There was no significant difference in either SDA duration or peak oxygen consumption (VO2) among low meal size ranges. But both increased linearly as meal size increased from 2 to 24% without reaching a plateau. Factorial metabolic scope was 5.92 in fish fed with 24% body mass, the highest documented feeding metabolic scope value in fish till now. The Peak VO2 of satiated meal size groups (175.85+/-10.55 mg O2 h(-1)) was above 80% of maximum metabolic rate during locomotion recovery process (215.48+/-7.07 mg O2 h(-1)). The relationship between energy expended on SDA (E) and energy ingested (I) was described as: E=0.0000432I(2)+0.140I+2.12. The lowest value of SDA coefficient appeared at 2% body mass group.
在25.0摄氏度下，对体重为30.90±1.30克的中华鲶（Silurus asotus Linnaeus）评估了相对进餐量（0.5-24%体重）对特定动力作用（SDA）的影响；用新鲜杀死的无内脏、头和尾的泥鳅鱼块作为测试餐。在低进餐量范围内，SDA持续时间或峰值耗氧量（VO2）均无显著差异。但随着进餐量从2%增加到24%，二者均呈线性增加，且未达到平台期。喂食24%体重餐量的鱼的因子代谢范围为5.92，这是目前文献记载的鱼类进食代谢范围的最高值。饱餐量组的峰值VO2（175.85±10.55毫克O2 h-1）在运动恢复过程中的最大代谢率（215.48±7.07毫克O2 h-1）的80%以上。用于SDA的能量消耗（E）与摄入能量（I）之间的关系描述为：E = 0.0000432I(2)+0.140I + 2.12。SDA系数的最低值出现在2%体重组。
