Longevity is associated with relative brain size in birds

Ecology and Evolution
Piotr Minias, Patrycja Podlaszczuk

Abstract

Brain size of vertebrates has long been recognized to evolve in close association with basic life-history traits, including lifespan. According to the cognitive buffer hypothesis, large brains facilitate the construction of behavioral responses against novel socioecological challenges through general cognitive processes, which should reduce mortality and increase lifespan. While the occurrence of brain size-lifespan correlation has been well documented in mammals, much less evidence exists for a robust link between brain size and longevity in birds. The aim of this study was to use phylogenetically controlled comparative approach to test for the relationship between brain size and longevity among 384 avian species from 23 orders. We used maximum lifespan and maximum reproductive lifespan as the measures of longevity and accounted for a set of possible confounding effects, such as allometry, sampling effort, geographic patterns, and life-history components (clutch size, incubation length, and mode of development). We found that both measures of longevity positively correlated with relative (residual) brain size. We also showed that major diversification of brain size preceded diversification of longevity in avian evolution. In c...Continue Reading

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Citations

Apr 4, 2018·Evolution; International Journal of Organic Evolution·Xin YuAlexander Kotrschal
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Sep 26, 2019·Scientific Reports·Yun Lin CaiWen Bo Liao
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Feb 23, 2021·PeerJ·Beata Grzywacz, Piotr Skórka
Jun 13, 2021·Communications Biology·N Mota-MartorellR Pamplona

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Methods Mentioned

BETA
environmental stress

Software Mentioned

R
glm2
lsr
Statistica
SumTrees
DendroPy
AnAge
Analysis of Phylogenetics and Evolution ( APE )
APE

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