一种长寿海鸟社会环境的形成与年龄有关:一种定量遗传方法。

IF 5.4 2区 生物学 Q1 BIOLOGY Philosophical Transactions of the Royal Society B: Biological Sciences Pub Date : 2024-12-16 Epub Date: 2024-10-28 DOI:10.1098/rstb.2022.0465
Maria Moiron, Sandra Bouwhuis
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引用次数: 0

摘要

社会行为的个体差异会导致空间分布的细微差别,进而导致所经历的社会环境的细微差别。鉴于与社会环境差异相关的预期健康后果,了解形成这些差异的因素势在必行。其中一个潜在的因素就是年龄。年龄特异性的社会行为--通常被称为 "社会老化"--最近才引起人们的注意,需要更多跨类群的实证研究。在这里,我们利用在一个长寿、殖民繁殖的普通燕鸥(Sterna hirundo)血统种群中收集到的 29 年纵向数据,研究了社会老化的一个方面的变异来源和定量遗传基础:以繁殖期间的邻居数量为代表,对所经历的社会环境的塑造。我们的分析揭示了繁殖期间邻居数量随年龄的下降,以及邻居数量多的个体的选择性消失。此外,我们还发现这一社会特征及其年龄特异性下降斜率的个体差异是可遗传的。这些结果表明,社会老龄化可能是整体多因果老龄化表型的部分变异的基础,也可能经历微观进化,突出了社会老龄化作为自然种群进化潜力的促进因素或制约因素的潜在作用。
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Age-dependent shaping of the social environment in a long-lived seabird: a quantitative genetic approach.

Individual differences in social behaviour can result in fine-scale variation in spatial distribution and, hence, in the social environment experienced. Given the expected fitness consequences associated with differences in social environments, it is imperative to understand the factors that shape them. One potential such factor is age. Age-specific social behaviour-often referred to as 'social ageing'-has only recently attracted attention, requiring more empirical work across taxa. Here, we use 29 years of longitudinal data collected in a pedigreed population of long-lived, colonially breeding common terns (Sterna hirundo) to investigate sources of variation in, and quantitative genetic underpinnings of, an aspect of social ageing: the shaping of the social environment experienced, using the number of neighbours during breeding as a proxy. Our analyses reveal age-specific declines in the number of neighbours during breeding, as well as selective disappearance of individuals with a high number of neighbours. Moreover, we find this social trait, as well as individual variation in the slope of its age-specific decline, to be heritable. These results suggest that social ageing might underpin part of the variation in the overall multicausal ageing phenotype, as well as undergo microevolution, highlighting the potential role of social ageing as a facilitator for, or constraint of, the evolutionary potential of natural populations.This article is part of the discussion meeting issue 'Understanding age and society using natural populations'.

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来源期刊
CiteScore
11.80
自引率
1.60%
发文量
365
审稿时长
3 months
期刊介绍: The journal publishes topics across the life sciences. As long as the core subject lies within the biological sciences, some issues may also include content crossing into other areas such as the physical sciences, social sciences, biophysics, policy, economics etc. Issues generally sit within four broad areas (although many issues sit across these areas): Organismal, environmental and evolutionary biology Neuroscience and cognition Cellular, molecular and developmental biology Health and disease.
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