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首页> 外文期刊>Polar biology >Food, reproduction and survival in mice on sub-Antarctic Marion Island
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Food, reproduction and survival in mice on sub-Antarctic Marion Island

机译:南极马里恩岛上小鼠的食物,繁殖和存活

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摘要

The house mouse Mus musculus is the most widespread introduced mammal on sub-Antarctic islands, where it may alter ecosystem function. Ambient temperature and food availability affect reproduction and survival for mice. It is unclear how these factors influence mouse demography in the sub-Antarctic, and we tested the influence of food experimentally on Marion Island. Using food supplementation trials, we did not alter reproduction or overwinter survival. Alternatively, we argue ongoing climatic change on Marion could increase mouse densities through summer, while increased winter survival may reduce population growth rates the following summer through density dependence. The overall influence of these apposing forces depends on their relative strengths but may limit changes in mouse numbers with ongoing changes in climate in the sub-Antarctic.
机译:家鼠小家鼠是南极洲岛上最广泛引进的哺乳动物,它可能会改变生态系统的功能。环境温度和食物供应量会影响小鼠的繁殖和存活。目前尚不清楚这些因素如何影响南极洲的鼠标人口统计,我们通过实验测试了食物对马里恩岛的影响。使用食物补充试验,我们没有改变繁殖或越冬存活率。另外,我们认为,马里恩(Marion)正在进行的气候变化可能会增加整个夏季的小鼠密度,而冬季存活率的提高可能会由于密度依赖性而在接下来的夏季降低种群的增长率。这些作用力的总体影响取决于它们的相对强度,但随着南极洲气候的不断变化,可能会限制老鼠数量的变化。

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