Effect of food restriction on the energy metabolism of the Chinese bulbul (Pycnonotus sinensis).
Effect of food restriction on the energy metabolism of the Chinese bulbul (Pycnonotus sinensis).
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DOI：
10.13918/j.issn.2095-8137.2015.2.79
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Qing-Jian Liang;Lei Zhao;Jia-Qi Wang;Qian Chen;Wei-hong Zheng;Jinsong Liu
中科院分区：
文献类型：
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作者：
Qing-Jian Liang;Lei Zhao;Jia-Qi Wang;Qian Chen;Wei-hong Zheng;Jinsong Liu
食物资源在动物生理和行为的调节中发挥着重要作用。我们通过测量中国温州野生捕获的白鹎的体重、体脂肪、基础代谢率（BMR）和器官质量的变化，研究了短期食物限制对白鹎（Pycnonotus sinensis）代谢产热的影响。短期食物限制导致体重和体脂显着下降，但在不再限制食物后体重很快恢复到正常水平。禁食7天后BMR显着降低（P<0.05），禁食停止后基本恢复至正常水平。总BMR对数与体重对数呈正相关（r(2)=0.126，P<0.05）。暂时限食禽类的肝脏和消化道干质量高于对照禽类和持续限食禽类（分别为P<0.001和P<0.05）。与对照鸡和持续限食鸡相比，短期限食鸡的肺干质量（P<0.05）、心脏干重（P<0.01）和脾脏干质量（P<0.05）也存在显着差异。 BMR 与身体和器官（心脏、肾脏和胃）质量呈正相关。这些结果表明，白鹎通过利用其能量储备、降低基础代谢率和改变各内脏器官的重量来适应有限的食物供应，以平衡总能量需求。这些可能都是鸟类应对食物丰度不可预测的变化的生存策略。
Food resources play an important role in the regulation of animals' physiology and behavior. We investigated the effect of short-term food restriction on metabolic thermogenesis of Chinese bulbuls (Pycnonotus sinensis) by measuring changes in body mass, body fat, basic metabolic rate (BMR), and organ mass of wild-caught Chinese bulbuls from Wenzhou, China. Short-term food restriction induced a significant decrease in body mass and body fat but body mass returned to normal levels soon after food was no longer restricted. Food restriction caused a significant reduction in BMR after 7 days (P<0.05), which returned to normal levels after food restriction ceased. Log total BMR was positively correlated with log body mass (r(2)=0.126, P<0.05). The dry masses of livers and the digestive tract were higher in birds that had been subject to temporary food restriction than in control birds and those subject to continual food restriction (P<0.001 and P<0.05, respectively). There was also significant differences in the dry mass of the lungs (P<0.05), heart (P<0.01), and spleen (P<0.05) in birds subject to short-term food restriction compared to control birds and those subject to continual food restriction. BMR was positively correlated with body and organ (heart, kidney and stomach) mass. These results suggest that the Chinese bulbul adjusts to restricted food availability by utilizing its energy reserves, lowering its BMR and changing the weight of various internal organs so as to balance total energy requirements. These may all be survival strategies that allow birds to cope with unpredictable variation in food abundance.