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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Cost minimization by helpers in cooperative vertebrates.
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Cost minimization by helpers in cooperative vertebrates.

机译：合作脊椎动物中的助手将成本降到最低。

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摘要

When parents invest heavily in reproduction they commonly suffer significant energetic costs. Parents reduce the long-term fitness implications of these costs through increased foraging and reduced reproductive investment in the future. Similar behavioral modifications might be expected among helpers in societies of cooperative vertebrates, in which helping is associated with energetic costs. By using multivariate analyses and experiments, we show that in cooperative meerkats, Suricata suricatta, helping is associated with substantial short-term growth costs but limited long-term fitness costs. This association forms because individual contributions to cooperation are initially condition dependent, and, because when helpers invest heavily in cooperation, they increase their foraging rate during the subsequent nonbreeding period and reduce their level of cooperative investment in the subsequent reproductive period. These results provide a unique demonstration that despite significant short-term costs, helpers, like breeders, are able to reduce the fitness consequences of these costs through behavioral modifications.
机译：当父母在生殖方面投入大量资金时，他们通常会付出巨大的精力成本。父母通过增加觅食和减少未来的生殖投资来减少这些成本的长期适应性影响。在合作脊椎动物社会的助手中，可能会期望类似的行为改变，在这种情况下，帮助与精力充沛的代价有关。通过使用多元分析和实验，我们表明，在合作猫鼬中，Suricata suricatta的帮助与可观的短期增长成本相关，而长期健身成本却有限。之所以建立这种联系，是因为个人对合作的贡献最初取决于条件，并且因为当佣工投入大量资金进行合作时，他们会在随后的非繁殖期间提高觅食率，并在随后的生育期降低合作投资水平。这些结果提供了一个独特的证明，尽管短期花费巨大，但像育种者一样的帮助者仍能够通过行为改变来降低这些花费的适应性后果。

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