期刊
EVOLUTION
卷 67, 期 5, 页码 1527-1536出版社
OXFORD UNIV PRESS
DOI: 10.1111/evo.12014
关键词
Antioxidant protection; daily energy expenditure; doubly-labeled water; energetics; food-supplementation; life-history theory
资金
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- National Science Foundation [DEB-0515849]
- Aboriginal Affairs and Northern Development Canada Northern Scientific Training Program
- British Ecological Society
- National Institute on Aging [AG17994, AG21042]
- NSERC
A central principle in life-history theory is that reproductive effort negatively affects survival. Costs of reproduction are thought to be physiologically based, but the underlying mechanisms remain poorly understood. Using female North American red squirrels (Tamiasciurus hudsonicus), we test the hypothesis that energetic investment in reproduction overwhelms investment in antioxidant protection, leading to oxidative damage. In support of this hypothesis we found that the highest levels of plasma protein oxidative damage in squirrels occurred during the energetically demanding period of lactation. Moreover, plasma protein oxidative damage was also elevated in squirrels that expended the most energy and had the lowest antioxidant protection. Finally, we found that squirrels that were food-supplemented during lactation and winter had increased antioxidant protection and reduced plasma protein oxidative damage providing the first experimental evidence in the wild that access to abundant resources can reduce this physiological cost.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据