Smaller brained cliff swallows are more likely to die during harsh weather
Smaller brained cliff swallows are more likely to die during harsh weather
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大脑较小的悬崖燕子在恶劣天气下更容易死亡
DOI：
10.1098/rsbl.2020.0264
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发表时间：
2020
期刊：
影响因子：
3.3
通讯作者：
Brown, Charles R.
中科院分区：
文献类型：
--
作者：
Wagnon, Gigi S.;Brown, Charles R.
认知缓冲假说认为，更严酷、更不可预测的环境有利于大脑更大、认知能力更强的动物。跨分类群的比较支持了这一假设，但很少在一个物种中进行测试。我们测量了1982年至2018年在内布拉斯加州西部收集的1141个悬崖燕标本的大脑大小，根据头部尺寸推断。在不寻常的晚春寒流中饿死的崖燕，其大脑比其他原因死亡的崖燕的大脑要小得多，这表明这种物种的大脑大小可以影响觅食的成功，而且当条件超过正常的极端环境时，更强的认知能力可能会带来优势。大脑的大小随着样本所来自的繁殖群体的大小而显著下降。更大的大脑可能在更小的群体中更受青睐，这些群体代表着更不可预测和更具挑战性的社会环境，在这些环境中，关于食物来源的公共信息较少，对捕食者的集体警惕性也较低，即使在相对正常的条件下也是如此。我们的研究结果为认知缓冲假说提供了种内支持，并强调了罕见气候事件的潜在进化影响。
The cognitive-buffer hypothesis proposes that more harsh and unpredictable environments favour animals with larger brains and resulting greater cognitive skills. Comparisons across taxa have supported the hypothesis, but it has rarely been tested within a species. We measured brain size, as inferred from head dimensions, for 1141 cliff swallow specimens collected in western Nebraska, 1982–2018. Cliff swallows starving to death during unusual late-spring cold snaps had significantly smaller brains than those dying from other causes, suggesting that brain size in this species can affect foraging success and that greater cognitive ability may confer advantages when conditions exceed normal environmental extremes. Brain size declined significantly with the size of the breeding colony from which a specimen came. Larger brains may be favoured in smaller colonies that represent more unpredictable and more challenging social environments where there is less public information on food sources and less collective vigilance against predators, even in relatively normal conditions. Our results provide intraspecific support for the cognitive-buffer hypothesis and emphasize the potential evolutionary impact of rare climatic events.
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影响因子：
6.1
作者：
Brown, Charles R.;Brown, Mary Bomberger;Roche, Erin A.
通讯作者：
Roche, Erin A.
影响因子：
2.3
作者：
Kozlovsky, Dovid Y.;Branch, Carrie L.;Pravosudov, Vladimir V.
通讯作者：
Pravosudov, Vladimir V.
黑猩猩和猫科动物的饮食成分受猎物大脑大小的影响
影响因子：
3.3
作者：
S. Shultz;R. Dunbar
通讯作者：
R. Dunbar
影响因子：
4
作者：
Vergouw D;Heymans MW;Peat GM;Kuijpers T;Croft PR;de Vet HC;van der Horst HE;van der Windt DA
通讯作者：
van der Windt DA
影响因子：
8.8
作者：
Kotrschal A;Buechel SD;Zala SM;Corral-Lopez A;Penn DJ;Kolm N
通讯作者：
Kolm N