Antler development in reindeer in relation to age and sex
Antler development in reindeer in relation to age and sex
复制标题
驯鹿鹿角发育与年龄和性别的关系
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
E. Reimers
中科院分区：
文献类型：
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作者：
Amund Høymork;E. Reimers
一岁的雄性和成年雌性驯鹿（Rangifer tarandus tarandus）在大小和形状上相似。如果性线索被隐藏起来，就很难区分它们。鹿角可以是一个有用的辅助分类一岁的男性和成年女性，这取决于特定的鹿角特征是否可识别这两个群体。我们记录了鹿茸的特点，在国内驯鹿群（瓦加），并发现相当大的重叠，鹿角的高度，宽度和周长之间的不同年龄和性别组。当区分成年雌性、一岁雄性和2.5岁雄性时，总齿数和齿分裂数对野外生物学家有用。例如，当使用齿分裂与建议的分类，79%的观察成年女性和76%的一岁男性被正确分类。鹿角的高度、宽度和周长提供了群体之间的其他生物学差异，但不容易用来识别自由放养的驯鹿。这是由于各组之间鹿角大小的巨大重叠以及在实地研究情况下测量困难。公牛犊和母牛犊有非常相似的鹿角，只有鹿角的宽度是可能的性别歧视，给67%的准确率区分这两个群体。
Yearling male and adult female reindeer (Rangifer tarandus tarandus) are similar in size and shape. If sexual clues are hidden, it can be difficult to distinguish between them. Antlers can be a useful aid in classifying yearling males and adult females, depending on whether specific antler characteristics are identifiable for these two groups. We recorded antler characteristics in a domestic reindeer herd (Vaga) and found considerable overlap in antler height, width and circumference between the different age and sex groups. Total tines and number of tine split-offs are use¬ful for the field biologist when discriminating among adult females, yearling males and 2.5 year-old males. For example, when using the tine split-offs with the suggested classification, 79% of the observed adult females and 76% of the yearling males were classified correctly. The antler height, width and circumference provide other biological dif¬ferences between groups, but are not easy to use to identify free ranging reindeer. This is due to the great overlap in antler size between the groups and measuring difficulties in a field study situation. Male and female calves have very similar antlers, and only the antler width is possible for sex discrimination, giving 67% accuracy of discriminating between these two groups.