中文摘要：

特殊动力作用（SDA）是指动物摄食后代谢增加的现象，相关参数和功率曲线在动物生理生态学上具有重要的意义。本研究在25℃水温条件下，测定0％、0．50％、1．00％、2．00％和4．00％体重等不同摄食水平的锦鲫幼鱼在摄食前和摄食后的耗氧率。结果发现锦鲫幼鱼摄食后耗氧率显著增加（P〈0．05），约在摄食后2h达到峰值。0．50％、1．00％、2．00％和4．00％体重等4个摄食组的摄食代谢峰值（耗氧率）分别为（96．15±7．74）、（100．72±7．29）、（117．72±7．23）和（173．22±14．20）mg·kg^-1·h^-1，其中4．00％摄食水平组显著高于其他摄食水平组（P〈0.05）；SDA时间分别为（6．29±0．68）、（7．14±0．85）、（7．33±1．23）和（9．20±1．36）h，各摄食水平组之间没有显著差异；SDA总耗能分别为（1．42±0．18）、（1．58±0．20）、（2．63±0．60）和（5．33±0．76）kJ·kg^-1，其中4．00％摄食水平组的SDA总耗能显著高于其他摄食水平组（P〈0．05）；SDA系数分别为（4．60±0．52）％、（2．54±0．34）％、（2．07±0．45）％和（2．17±0．30）％，0．50％摄食水平组的SDA系数显著高于其他摄食水平组（P〈0．05）。研究结果表明锦鲫幼鱼摄食后的功率曲线呈典型的“三角型”，这与其经常摄食的生活习性和较低的营养等级地位相适应。

英文摘要：

Specific dynamic action （SDA） refers to the increase in metabolic rate in response to feeding which has significantly ecological relevance in the researches of animal physiological ecology, The pre-feeding and postprandial oxygen consumption rate （ Vo2 ） in juvenile crucian carp are fed with 0, 0.50%, 1.00%, 2.00% and 4.00% body mass meal size are measured at 25 ℃. The Vo2 increases immediately after feeding and it rises to peaked at 2 h posffeeding. The peak V% of 0.50%, 1.00%, 2.00% and 4.00% meal size groups are （96.15 ± 7.74）, （ 100.72± 7.29 ）, （ 117.72 ± 7.23 ） and （ 173.22 ± 14.20） mg·kg^-1·h^- 1, respectively. The peak Vo2 of fish fed with 4.00% meal size is significantly higher than those of others （p 〈 0.05 ）. The SDA duration of fish fed with 0.50%, 1.00%, 2.00% and 4.00% meal size is （6.29 ±0.68）, （7.14 ±0.85）, （7.33± 1.23） and （9.20 ± 1.36） h, but there are no significant difference among all groups. The energy expended on SDA of fish fed with 0.50% , 1.00%, 2.00% and 4. 00% meal size are （1.42 ±0.18）, （1.58 ±0.20）, （2.63 ±0.60） and （5.33 ±0.76） kJ· kg^-1 , and the value of 4.00% meal size group is significantly higher than those of other groups （p 〈 0.05 ）. SDA coefficients of 0.50% , 1.00%, 2.00% and 4.00% meal size groups are （4.60 ± 0.52 ） %, （ 2.54 ± 0.34 ） %, （ 2.07 ± 0.45 ） %, （ 2.17± 0.30） % , and the coefficient of fish fed with 0.50% meal size is significantly higher than those of other groups （ p 〈 0.05 ）. The results demonstrate that the profile of the postprandial metabolic rate presents a typical ＇ triangle-shaped curve＇ in juvenile crucian carp. It is evolutionarily adaptive to its active foraging mode and lower trophie level in its habitat.