The frequency distribution of bird body weights: aquatic and terrestrial species
The frequency distribution of bird body weights: aquatic and terrestrial species
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鸟类体重的频率分布：水生和陆生物种
DOI：
10.1111/j.1474-919x.1995.tb03245.x
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发表时间：
1995
期刊：
影响因子：
2.1
通讯作者：
T. Blackburn
中科院分区：
文献类型：
--
作者：
K. Gaston;T. Blackburn
世界鸟类的对数转换体重的频率分布是右偏的。造成这种偏差的原因尚不清楚。水生鸟类物种平均较重，重量分布的偏斜程度低于从总体重量分布中随机抽取的样本。相反，陆地物种的平均重量较轻，其重量分布更不平衡。这在一定程度上是一种系统发育效应;水生和陆生鸟类属于不同的科。这些差异表明，这些因素可能是鸟类整体重量分布的重要决定因素。
The frequency distribution of the log-transformed body-weights of the world's bird species is right-skewed. The reasons for this skew are unknown. Aquatic bird species are on average heavier and have a less skewed distribution of weights than would be expected if they were a random sample from the overall weight distribution. Conversely, terrestrial species on average weigh less, and their weight distribution is more skewed. This is partly a phylogenetic effect; species of aquatic and terrestrial birds belong to different families. These differences suggest factors which may be important determinants of the overall weight distribution of birds.