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付世建
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-1年11月30日
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付世建, S.J. Fu, X.J. Xie, Z.D. Cao
Comparative Biochemistry and Physiology, Part A 140 (2005) 445-451,-0001,():
-1年11月30日
Effect of relative meal size (0.6–24%) on specific dynamic action (SDA) was assessed in southern catfish juveniles (48.2±3.2 g) at 27.5℃. Cutlets of freshly killed loach species were used as test diet. Energy expended during SDA was linearly correlated with relative meal size (r =0.949, p<0.001, N =47). There was no significant difference in SDA coefficient (energy expended on SDA quantified as a percentage of the energy content of the meal) among different relative meal size groups. Factorial metabolic scope increased from 1.47 to 4.08 when the relative meal size increased from 0.6% to 24%. The peak VO2 increased with meal size, but levelled when relative meal size gradually increased to the maximum. SDA duration showed a S-type (slow-fast-slow) increase course with increased meal size. The results of this study suggest that the high postprandial factorial metabolic scope and a trapezoid SDA curve might be the adaptation strategy of warmwater sitand-wait fish under the natural selection of evolution related to long-term food resources.
Continuous-flow respirometer, Energy expended during SDA, Metabolic rate, Meal size, Peak VO2, SDA duration, Specific dynamic action, Silurus meridionalis Chen
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付世建
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-1年11月30日
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付世建
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-1年11月30日
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付世建, Shi-Jian Fu, Zhen-Dong Cao, Jiang-Lan Peng
J Comp Physiol B (2006) 176: 489-495,-0001,():
-1年11月30日
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℃; 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=0.0000432I2+0.140I+2.12. The lowest value of SDA coefficient appeared at 2% body mass group.
Metabolic rate, Meal size, Peak VO2, Specific dynamic action, Silurus asotus Linnaeus
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