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Silver-spoon upbringing improves early-life fitness but promotes reproductive ageing in a wild bird.
Ecology Letters ( IF 7.6 ) Pub Date : 2020-04-02 , DOI: 10.1111/ele.13501
Foteini Spagopoulou 1 , Céline Teplitsky 2 , Martin I Lind 1 , Stéphane Chantepie 3 , Lars Gustafsson 1 , Alexei A Maklakov 1, 4
Affiliation  

Early-life conditions can have long-lasting effects and organisms that experience a poor start in life are often expected to age at a faster rate. Alternatively, individuals raised in high-quality environments can overinvest in early-reproduction resulting in rapid ageing. Here we use a long-term experimental manipulation of early-life conditions in a natural population of collared flycatchers (Ficedula albicollis), to show that females raised in a low-competition environment (artificially reduced broods) have higher early-life reproduction but lower late-life reproduction than females raised in high-competition environment (artificially increased broods). Reproductive success of high-competition females peaked in late-life, when low-competition females were already in steep reproductive decline and suffered from a higher mortality rate. Our results demonstrate that 'silver-spoon' natal conditions increase female early-life performance at the cost of faster reproductive ageing and increased late-life mortality. These findings demonstrate experimentally that natal environment shapes individual variation in reproductive and actuarial ageing in nature.

中文翻译:

生来有福的银汤可以改善早期的健康状况,但可以促进野生鸟类的生殖衰老。

生命早期状况可能会产生长期影响,人们通常会认为生命开始较差的生物体的衰老速度更快。另外,在高质量环境中成长的人可能会在早期繁殖上投入过多,从而导致衰老。在这里,我们对领ed捕蝇器(Ficedula albicollis)的自然种群中的早期生活条件进行了长期实验操作,以表明在低竞争环境中饲养的雌性(人工减少的育雏)具有较高的早期繁殖能力,但较低在高竞争环境(人工繁殖的群体)中繁殖的雌性比雌性晚繁殖。高竞争女性的生殖成功在晚年达到顶峰,当时低竞争女性的生殖能力已经急剧下降,死亡率更高。我们的结果表明,“银汤匙”的出生状况以更快的生殖衰老和更高的后期死亡率为代价,提高了女性的早期寿命。这些发现通过实验证明了出生环境会影响自然界生殖和精算衰老的个体差异。
更新日期:2020-04-02
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