Does body condition affect fecundity in a cyclic population of snowshoe hares
Does body condition affect fecundity in a cyclic population of snowshoe hares
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身体状况是否会影响雪鞋兔循环种群的繁殖力
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
Elizabeth A. Gillis
中科院分区：
文献类型：
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作者：
K. Hodges;C. Stefan;Elizabeth A. Gillis
雪鞋野兔（Lepus americanus）经历了一个10年的周期丰富，与繁殖周期的变化发生3年前的数字变化。繁殖可能与身体状况有关，身体状况可能会随着营养或捕食压力而变化。我们描述野兔身体状况（作为一个质量-骨骼大小的关系），通过一个周期在南部育空地区从1989年至1996年，测试的影响，食物和捕食风险对身体状况，并检查是否身体状况的变化与周期性生殖变化。野兔身体状况在衰退期最低，但在低谷期迅速改善。虽然一岁的野兔在较差的条件比成年人，年龄结构的变化不能解释的周期性波动的条件。食物的增加和捕食者的减少都导致了更好的身体状况。身体状况不影响繁殖。结果表明，兔的出生率最高的是处于中间状态的兔，最低的是处于中间状态的兔。
Snowshoe hares (Lepus americanus) undergo a 10-year cycle in abundance, with cyclic changes in reproduction occurring 3 years prior to numeric changes. Reproduction may be associated with body condition, which might change with nutrition or predation pressure. We describe hare body condition (as a mass - skeletal size relationship) through a cycle in the southern Yukon from 1989 to 1996, test the effects of food and predation risk on body condition, and examine whether changes in body condition are related to cyclic reproductive changes. Hare body condition was lowest during the decline phase but rapidly improved during the low phase. Although yearling hares were in poorer condition than adults, changes in age structure cannot explain the cyclic fluctuation in condition. Food addition and predator reduction both resulted in better body condition. Body condition did not affect reproduction. The highest natality occurred when hares were in intermediate condition, while the lowest natality occurred when hare...