| 李秀明,曹振东,付世建.2009.摄食水平对瓦氏黄颡鱼餐后代谢特征的影响.动物学杂志,44(6):10-16. |
| 摄食水平对瓦氏黄颡鱼餐后代谢特征的影响 |
| Effect of Meal Size on Postprandial Metabolic Response in Pelteobagrus vachelli |
| 投稿时间：2009-03-20 修订日期：2009-09-04 |
| DOI： |
| 中文关键词: 特殊动力作用 摄食水平 代谢率 瓦氏黄颡鱼 |
| 英文关键词:Specific dynamic action Force-feeding sizes Oxygen consumption rate Pelteobagrus vachelli |
| 基金项目:国家自然科学基金项目(No.30700087);重庆市高校优秀人才支持计划项目;重庆市教委科研项目(No.KJ080823) |
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| 中文摘要: |
| 以新鲜泥鳅(Misgurus anguillicanndotus)肉块为饵料,采用麻醉灌喂的方法,在(25.0±0.5)℃条件下,研究了瓦氏黄颡鱼(Pelteobagrus vachelli)幼鱼[体重(7.03±0.15)g,n=42]不同摄食水平(饵料分别为体重的0%、1%、2%、4%和8%)对餐后代谢反应的影响。结果显示,在不同摄食水平下,瓦氏黄颡鱼摄食代谢均呈现先上升后下降的整体变化趋势;摄食水平由1%增加到8%,实验鱼的SDA耗能、SDA时间和摄食代谢峰值(PMR)分别从3.09kJ/kg、8h和56.08mgO2/kg.h增加到47.21kJ/kg、36h和97.25mgO2/kg.h;其中,8%(饱足摄食水平)和4%摄食水平组的代谢率在峰值水平能够持续20h左右。瓦氏黄颡鱼最大运动代谢率(MMR)为166.5mgO2/kg.h,显著大于饱食组PMR(P<0.05)。本研究还表明,随摄食水平上升,瓦氏黄颡鱼通过PMR的增加和SDA时间的延长来满足SDA耗能增加的需求;从摄食4%组和8%组相似的梯形摄食代谢曲线,可以看出瓦氏黄颡鱼在高摄食水平条件(>4%)下限制了摄食代谢的上升;PMR相对于静止代谢上升倍率较小,暗示其摄食占据的代谢空间较小,进而保留了大量剩余代谢空间用于运动和其他生理活动,这可能与其活跃的觅食活动习性有关。 |
| 英文摘要: |
| Effect of meal sizes (0%,1%,2%,4% and 8% body mass) on postprandial metabolic response was investigated in juvenile Darkbarbel Catfish (Pelteobagrus vachelli) (7.03±0.15 g,n=42) at 25±0.5℃.Fish were lightly anaesthetized and force-fed with freshly killed loach.The postprandial metabolic rate firstly increased and then slowly decreased to pre-fed level.The SDA duration were 8,24,26 and 36 h and time to peak metabolic rate (PMR) were 4,4,6 and 6 h in 1%,2%,4% and 8 % meal size groups.The peak metabolic rates of 8% meal size (97.25 mg O2/kg·h) and 4% meal size (87.46 mg O2/kg·h) groups were significantly higher than that of 2% meal size group (70.37 mg O2/kg·h),while the latter is significantly higher than that of 1% meal size group (56.08 mg O2/kg·h) (P<0.05).The energy expended on SDA increased with meal size while the SDA coefficient of 1% meal size group was significantly lower than those of other meal size groups (P<0.05).The maximum exercise metabolic rate (MMR,166.5 mg O2/kg·h) was significantly higher than PMR (P<0.05).Both PMR and duration increased to fulfill the increased energy expenditure during SDA with the increasion of meal size.The similar trapeziform postprandial metabolic profiles of 4% and 8% meal size groups suggested that the increasion of PMR is restrained at high meal size range.The lower value of PMR/RMR implied that Darkbarbel Catfish has low feeding metabolic capacity.The withholding of large metabolic scope for locomotion and other physiological activities might be related to its active foraging mode. |
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