Body mass variation is negatively associated with brain size: Evidence for the fat-brain trade-off in anurans
Body mass variation is negatively associated with brain size: Evidence for the fat-brain trade-off in anurans
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体重变化与大脑大小负相关：无尾动物脂肪与大脑权衡的证据
DOI：
10.1111/evo.13991
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发表时间：
2020-05-27
期刊：
影响因子：
3.3
通讯作者：
Kotrschal, Alexander
中科院分区：
文献类型：
--
作者：
Huang, Yan;Mai, Chun Lan;Kotrschal, Alexander
物种可以进化出不同的策略来生存不确定时期。动物可能要么投资于能量储存，从而降低觅食成本，例如运动或被捕食的风险，要么投资于更好的认知能力，帮助它们灵活地调整自己的行为以应对新的挑战。在这里，我们通过将体重变异系数（CVbodymass；作为动物在整个季节投入储存量的指标）与大脑解剖特征联系起来，在 38 种中国无尾动物中测试了脂肪与大脑权衡的想法。在校正共同的祖先和体重后，我们发现相对大脑大小和心血管体重之间存在负相关关系。这表明无尾目动物似乎在能量短缺期间权衡生理和认知缓冲。正如在树栖哺乳动物和灵长类动物中报道的类似模式一样，我们的研究结果表明，脂肪与大脑的权衡，即动物要么投入生理策略，要么投入认知策略以在恶劣的条件下生存，可能是脊椎动物的普遍模式。
Species can evolve diverse strategies to survive periods of uncertainty. Animals may either invest in energy storage, allowing them to decrease foraging costs, such as locomotion or risk of predation, or they may invest in better cognitive abilities helping them to flexibly adapt their behavior to meet novel challenges. Here, we test this idea of a fat-brain trade-off in 38 species of Chinese anurans by relating the coefficient of variation of body mass (CVbodymass; as an indicator of how much animals invest into storage over the season) to brain anatomical features. After correcting for shared ancestry and body mass, we found a negative relationship between relative brain size and CVbodymass. This indicates that anurans seem to trade-off physiological and cognitive buffering during energy shortages. As similar patterns have been reported in arboreal mammals and primates our findings suggest that the fat-brain trade-off, where animals either invest into physiological or cognitive strategies to survive harsh conditions, may be a general pattern across vertebrates.