Fu Shi-Jian, Zeng Ling-Qing, Li Xiu-Ming, Pang Xu, Cao Zhen-Dong, Peng Jiang-Lan, Wang Yu-Xiang
Laboratory of Evolutionary Physiology and Behaviour, Chongqing Key Laboratory of Animal Biology, Chongqing Normal University, Chongqing, China.
J Comp Physiol B. 2009 May;179(4):509-17. doi: 10.1007/s00360-008-0337-x. Epub 2009 Jan 7.
Effects of feeding on pre-exercise VO(2) and excess post-exercise oxygen consumption (EPOC) after exhaustive exercise were investigated in sedentary southern catfish, active herbivorous grass carp, omnivorous crucian carp, and sluggish omnivorous darkbarbel catfish to test whether feeding had different effects on EPOC and to compare EPOC in fishes with different ecological habits. For fasting fish, the pre-exercise and peak post-exercise VO(2) were higher and recovery rates were faster in crucian carp and grass carp compared to those of darkbarbel catfish and southern catfish. EPOC magnitudes of grass carp and southern catfish were significantly larger than those of crucian carp and darkbarbel catfish. Feeding had no significant effect on peak post-exercise VO(2), recovery rate, and EPOC magnitude in grass carp. Both the pre-exercise and peak post-exercise VO(2) increased with meal size, while the EPOC magnitude and duration decreased significantly in the larger meal size groups of crucian carp and southern catfish. In darkbarbel catfish, both the pre-exercise and peak post-exercise VO(2) increased with meal size, but the VO(2) increment elicited by exercise was larger in feeding groups compared with the fasting group. These results suggest that (1) the characteristics of the post-exercise VO(2) profile, such as peak post-exercise VO(2) and recovery rate, were closely related to the activity of fishes, whereas the EPOC magnitude was not and (2) the effects of feeding on EPOC were more closely related to the postprandial increase in VO(2).
研究了摄食对久坐不动的南方鲇、活跃的草食性草鱼、杂食性鲫鱼和行动迟缓的杂食性黄颡鱼在力竭运动后运动前的VO₂以及运动后过量氧耗（EPOC）的影响，以测试摄食对EPOC是否有不同影响，并比较不同生态习性鱼类的EPOC。对于空腹鱼，与黄颡鱼和南方鲇相比，鲫鱼和草鱼运动前及运动后峰值VO₂更高，恢复速率更快。草鱼和南方鲇的EPOC量显著大于鲫鱼和黄颡鱼。摄食对草鱼运动后峰值VO₂、恢复速率和EPOC量没有显著影响。鲫鱼和南方鲇较大摄食量组中，运动前和运动后峰值VO₂均随摄食量增加，而EPOC量和持续时间显著降低。在黄颡鱼中，运动前和运动后峰值VO₂均随摄食量增加，但与空腹组相比，摄食组运动引起的VO₂增量更大。这些结果表明：（1）运动后VO₂曲线特征，如运动后峰值VO₂和恢复速率，与鱼类活动密切相关，而EPOC量并非如此；（2）摄食对EPOC的影响与餐后VO₂增加更为密切相关。
