Body Mass and Antler Development Patterns of Rocky Mountain Elk (Cervus elaphus nelsoni) in Michigan
Body Mass and Antler Development Patterns of Rocky Mountain Elk (Cervus elaphus nelsoni) in Michigan
复制标题
密歇根州落基山麋鹿（Cervus elaphus nelsoni）的体重和鹿角发育模式
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Haufler
中科院分区：
文献类型：
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作者：
L. Bender;Elaine A. Carlson;S. Schmitt;J. Haufler
摘要我们记录了密歇根州落基山麋鹿的平均和最大体重，质量增长模式和鹿角发育模式。在密歇根州，公牛的平均体重比其他落基山麋鹿种群平均重9-11%，最大体重重23-27%。在密歇根州，奶牛的平均活体质量平均增加11%，但平均切除内脏的体重没有差异。在密歇根州，奶牛的最大体重增加了10-24%。公牛的体重在7.5岁时达到峰值，母牛的体重在8.5岁时达到峰值，与其他落基山麋鹿种群相似，尽管密歇根州的麋鹿体重更大。公牛和母牛体重的性别二型性增加，直到达到峰值体重，因此公牛比母牛重1.38%。公麋鹿的鹿角发育在10.5岁时达到顶峰，与其他落基山麋鹿种群相当。年龄组内鹿茸发育和体重之间的关系是高度可变的，但一般较弱。在密歇根州看到的更大的体重，以及在公牛的体重之后鹿角发育的峰值，表明了对营养条件的表型反应，使密歇根州的落基山麋鹿能够最大限度地提高物种的生长潜力。
Abstract We documented mean and maximum body mass, mass accretion patterns and antler development patterns of Rocky Mountain elk in Michigan. Mean body mass of bulls averaged 9–11% heavier, and maximum body mass 23–27% heavier, in Michigan than in other Rocky Mountain elk populations. Mean live body mass of cows averaged 11% heavier in Michigan, but mean eviscerated body mass did not differ. Maximum body mass of cows was 10–24% heavier in Michigan. Body mass peaked at age 7.5 for bulls and 8.5 for cows, similar to other Rocky Mountain elk populations despite the greater body mass achieved in Michigan. Sexual dimorphism in bull and cow body mass increased until peak body mass was attained, whereupon bulls were ∼38% heavier than cows. Antler development of bull elk peaked at age 10.5, comparable to other Rocky Mountain elk populations. Relations between antler development and body mass within age classes were highly variable, but generally weak. Greater body mass seen in Michigan, and the peaking of antler development well after body mass in bulls, suggested a phenotypic response to nutritional conditions that allow Rocky Mountain elk in Michigan to maximize the species growth potential.