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野生马鹿种群中牙齿磨损、栖息地质量与晚年繁殖之间的关系。

The relationship between tooth wear, habitat quality and late-life reproduction in a wild red deer population.

作者信息

Nussey Daniel H, Metherell Bonnie, Moyes Kelly, Donald Alison, Guinness Fiona E, Clutton-Brock Tim H

机构信息

Department of Zoology, University of Cambridge, Downing Street, Cambridge, UK.

出版信息

J Anim Ecol. 2007 Mar;76(2):402-12. doi: 10.1111/j.1365-2656.2007.01212.x.

Abstract
  1. Molar tooth wear is considered an important proximate mechanism driving patterns of senescence in ungulates but few studies have investigated the causes of variation in molar wear or their consequences for reproductive success. 2. In this study, we assessed molar tooth wear at death among red deer Cervus elaphus of known age on the Isle of Rum, Scotland. 3. First molar height showed a decelerating decline with age. In females, the rates of molar wear with age varied with location of home range and individuals experiencing low resource competition showed reduced molar wear. We suggest that this spatial variation in molar wear is related to differences in the availability of high-quality grazing habitat and levels of resource competition. 4. There was no evidence that females with more heavily worn molars had reduced reproductive performance late in life or that first molar height was associated with reproductive senescence.
摘要
  1. 臼齿磨损被认为是有蹄类动物衰老模式的一个重要直接机制,但很少有研究调查臼齿磨损变化的原因及其对繁殖成功的影响。2. 在本研究中,我们评估了苏格兰拉姆岛上已知年龄的马鹿(Cervus elaphus)死亡时的臼齿磨损情况。3. 第一臼齿高度随年龄呈减速下降。在雌性中,臼齿随年龄的磨损率因活动范围位置而异,资源竞争低的个体臼齿磨损减少。我们认为,臼齿磨损的这种空间差异与优质放牧栖息地的可用性和资源竞争水平的差异有关。4. 没有证据表明臼齿磨损更严重的雌性在生命后期繁殖性能下降,或者第一臼齿高度与生殖衰老有关。

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