群居灵长类动物的社会老龄化可预防传染病。

IF 5.4 2区 生物学 Q1 BIOLOGY
Erin R Siracusa, Melissa A Pavez-Fox, Josué E Negron-Del Valle, Daniel Phillips, Michael L Platt, Noah Snyder-Mackler, James P Higham, Lauren J N Brent, Matthew J Silk
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引用次数: 0

摘要

社交生活的益处已得到公认,但社交也有成本,包括传染病风险。社交的成本效益比预计会随着个体寿命的增长而变化,这可能会推动社交行为随着年龄的增长而变化。为了探讨这一观点,我们将一种群居灵长类动物的数据与流行病学模型结合起来,结果表明,年老时较低的社会联系可以抵御一种假定的、直接传播的地方性病原体所带来的代价。假设流行病学特征(感染易感性、严重程度和持续时间)不存在年龄差异,老年个体的感染成本较低,这主要是因为他们的社会网络联系比年轻人少。社会老龄化 "的这种益处取决于流行病学特征,当感染严重程度随年龄增加时,这种益处最大。当感染持续时间随着年龄的增长而延长时,只有当病原体传播性较低时,社会老龄化才会带来益处。老年人从较低的互动频率(强度)和网络嵌入性(亲密度)中获益最多,而从较少的社会伙伴(程度)中获益较少。我们的研究首次考察了社会老龄化的流行病学,表明病原体有可能影响自然人群中社会老龄化的进化动态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Social ageing can protect against infectious disease in a group-living primate.

The benefits of social living are well established, but sociality also comes with costs, including infectious disease risk. This cost-benefit ratio of sociality is expected to change across individuals' lifespans, which may drive changes in social behaviour with age. To explore this idea, we combine data from a group-living primate for which social ageing has been described with epidemiological models to show that having lower social connectedness when older can protect against the costs of a hypothetical, directly transmitted endemic pathogen. Assuming no age differences in epidemiological characteristics (susceptibility to, severity and duration of infection), older individuals suffered lower infection costs, which was explained largely because they were less connected in their social networks than younger individuals. This benefit of 'social ageing' depended on epidemiological characteristics and was greatest when infection severity increased with age. When infection duration increased with age, social ageing was beneficial only when pathogen transmissibility was low. Older individuals benefited most from having a lower frequency of interactions (strength) and network embeddedness (closeness) and benefited less from having fewer social partners (degree). Our study provides a first examination of the epidemiology of social ageing, demonstrating the potential for pathogens to influence the evolutionary dynamics of social ageing in 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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