Seasonal variation in body mass and energy budget in Chinese bulbuls (pycnonotus sinensis)
Seasonal variation in body mass and energy budget in Chinese bulbuls (pycnonotus sinensis)
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中国鹎 (pycnonotus sinensis) 体重和能量收支的季节变化
DOI：
10.1186/s40657-014-0004-8
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发表时间：
2014-09
期刊：
影响因子：
1.8
通讯作者：
Liu Jinsong
中科院分区：
文献类型：
--
作者：
Wu Mengsi;Xiao Yuchao;Yang Fang;Zhou Limeng;Zheng Weihong;Liu Jinsong
研究背景温带小型鸟类的体重和能量收支的季节性调整对它们的生存具有重要意义。本研究测定了温州地区野生白头公鱼（Pycnonotus sinensis）体重、体温、总能量摄入量（GEI）、可消化能摄入量（DEI）、体脂含量以及消化道长度和质量的季节变化。然后使用氧弹热量计测定干燥食物和粪便的热量含量。在索氏装置中通过乙醚提取从干燥的尸体中提取总脂肪。每只鸟的消化道进行测量和称重，然后干燥到一个恒定的质量。结果体质量表现出显着的季节变化，春季和冬季高于夏季和秋季。体脂含量冬季高于其他季节。GEI和DEI在冬季显著较高。消化道的长度和质量在冬季最大，这两个参数的大小与体重，GEI和DEI呈正相关。小雀形目通常有较高的每日能量消耗在冬季，需要增加食物consumption.ConclusionsThis一般观察是一致的，观察到的冬季增加肠道体积和体重在中国灯泡。这些结果表明，中国种公牛通过增加体质量、体脂肪、GEI、DEI和消化道大小来适应冬季环境。
BackgroundSeasonal adjustments in body mass and energy budget are important for the survival of small birds in temperate zones. Seasonal changes in body mass, body temperature, gross energy intake (GEI), digestible energy intake (DEI), body fat content, as well as length and mass of the digestive tract, were measured in Chinese Bulbuls (Pycnonotus sinensis) caught in the wild at Wenzhou, China.MethodsBody mass was determined with a Sartorius balance. The caloric contents of the dried food and feces were then determined using a oxygen bomb calorimeter. Total fat was extracted from the dried carcasses by ether extraction in a Soxhlet apparatus. The digestive tract of each bird was measured and weighed, and was then dried to a constant mass.ResultsBody mass showed a significant seasonal variation and was higher in spring and winter than in summer and autumn. Body fat was higher in winter than in other seasons. GEI and DEI were significantly higher in winter. The length and mass of the digestive tract were greatest in winter and the magnitude of both these parameters was positively correlated with body mass, GEI and DEI. Small passerines typically have higher daily energy expenditure in winter, necessitating increased food consumption.ConclusionsThis general observation is consistent with the observed winter increase in gut volume and body mass in Chinese Bulbuls. These results suggest that Chinese Bulbuls adjust to winter conditions by increasing their body mass, body fat, GEI, DEI and digestive tract size.
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DOI：
10.1007/bf00692302
发表时间：
2004
期刊：
Journal of comparative physiology
影响因子：
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作者：
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通讯作者：
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DOI：
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1996
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Respiration physiology
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1973-07
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Comparative biochemistry and physiology. A, Comparative physiology
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发表时间：
1996-11
期刊：
The Condor
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发表时间：
2008
期刊：
Chinese Journal of Zoology
影响因子：
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