Maternal investment, life histories, and the evolution of brain structure in primates
Maternal investment, life histories, and the evolution of brain structure in primates
复制标题
灵长类动物的母性投资、生命史和大脑结构的进化
DOI：
10.1098/rspb.2019.1608
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
R. Barton
中科院分区：
文献类型：
--
作者：
Lauren E. Powell;Sally E. Street;R. Barton
生命史与大脑的相对大小密切相关：大大脑的哺乳动物和鸟类比小大脑的物种有更慢的生命史和更长的寿命。解释这一发现的一个有影响力的适应性假设是认知缓冲假说（CBH）。 CBH 提出，较大的大脑允许更大的行为灵活性，从而缓冲动物免受不可预测的环境挑战，从而降低死亡率并延长寿命。相比之下，发育成本假说（DCH）表明，大脑大小的生活史相关性反映了适应大大脑进化所需的成熟过程的延伸。这些假设并不相互排斥，但确实做出了不同的预测。在这里，我们在灵长类动物中测试了这一假设的新预测：检查具有不同发育轨迹的大脑成分的体积如何与母体投资、青少年期和成熟后寿命的相关阶段相关。与 DCH 一致，产前和产后发育的生长分配不同的结构与母亲投资和成熟前寿命的相关时期表现出可预见的不同相关性。与 CBH 相反，一旦考虑到母亲投入的持续时间，成人寿命与整个大脑大小或单个大脑组件的大小都不相关。我们的结果证实并详细阐述了母体投入和后代发育在大脑进化中的作用，表明大脑成分可以通过改变不同的发育机制部分独立地进化，并暗示涉及与环境相互作用的出生后成熟过程可能对小脑功能的发展特别重要。他们还解释了为什么猿类具有相对较长的成熟时间，这与该进化枝中小脑的相对扩张有关。
Life history is a robust correlate of relative brain size: large-brained mammals and birds have slower life histories and longer lifespans than smaller-brained species. One influential adaptive hypothesis to account for this finding is the Cognitive Buffer Hypothesis (CBH). The CBH proposes that large brains permit greater behavioural flexibility and thereby buffer the animal from unpredictable environmental challenges, allowing reduced mortality and increased lifespan. In contrast, the Developmental Costs Hypothesis (DCH) suggests that life-history correlates of brain size reflect the extension of maturational processes needed to accommodate the evolution of large brains. The hypotheses are not mutually exclusive but do make different predictions. Here we test novel predictions of the hypotheses in primates: examining how the volume of brain components with different developmental trajectories correlate with relevant phases of maternal investment, juvenile period and post-maturational lifespan. Consistent with the DCH, structures with different allocations of growth to pre-natal versus post-natal development exhibit predictably divergent correlations with the associated periods of maternal investment and pre-maturational lifespan. Contrary to the CBH, adult lifespan is uncorrelated with either whole brain size or the size of individual brain components once duration of maternal investment is accounted for. Our results substantiate and elaborate on the role of maternal investment and offspring development in brain evolution, suggest that brain components can evolve partly independently through modifications of distinct developmental mechanisms, and imply that postnatal maturational processes involving interaction with the environment may be particularly crucial for the development of cerebellar function. They also provide an explanation for why apes have relatively extended maturation times, which relate to the relative expansion of the cerebellum in this clade.
影响因子：
56.9
作者：
FINLAY, BL;DARLINGTON, RB
通讯作者：
DARLINGTON, RB
DOI：
--
发表时间：
1989
期刊：
Journal fur Hirnforschung
影响因子：
--
作者：
DeVito,JL;Graham,J;Sackett,GP
通讯作者：
Sackett,GP