A marker of biological ageing predicts adult risk preference in European starlings, Sturnus vulgaris.
A marker of biological ageing predicts adult risk preference in European starlings, Sturnus vulgaris.
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DOI：
10.1093/beheco/ary009
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发表时间：
2018-05
期刊：
影响因子：
--
通讯作者：
Bateson M
中科院分区：
文献类型：
--
作者：
Andrews C;Nettle D;Reichert S;Bedford T;Monaghan P;Bateson M
为什么有些人比其他人赌得更多？现有的基于动物挨饿程度的理论，只得到了微弱的证据支持。我们发现，衰老速度较快的鸟类在觅食时不太可能赌博。我们通过缩短被称为端粒的DNA序列来测量八哥的生物衰老。端粒缩短得更多的鸟类对觅食选择有更强的偏好，这种选择可以产生一致的食物量而不是可变的食物量。为什么有些人比其他人更容易赌博？动物通常在两种平均报酬相同但报酬差异程度不同的觅食选择之间表现出偏好，而且这种风险偏好因个体而异。以前解释风险偏好差异的尝试都集中在能源预算上，但经验支持有限。在这里，我们考虑影响死亡率和剩余生殖价值的生物老化是否可以预测风险偏好。我们研究了一群欧洲八哥(Sturnus Common Garis)，在这些队列中，我们以前曾测量过发育中的红细胞端粒磨损，这是一种已建立的生物衰老的综合生物标志物。我们测量了成年鸟在选择固定数量的食物和平均数量相同的可变数量食物时的偏好。在控制了实验期间体重的变化(能量收支的指标)后，我们发现，经历了更多发育端粒磨损的鸟类在成年后比那些端粒缩短较少的雏鸟在成年后更不愿冒险。与青少年端粒长度或早期的食物供应和乞讨努力相比，发育性端粒磨损是成人风险偏好的更好预测指标。因此，我们的纵向研究表明，通过发育端粒磨损衡量的生物老化是成人风险偏好持久差异的重要来源。
Why do some individuals gamble more than others? Existing theories, based on how close animals are to starvation, have been only weakly supported by evidence. We found that faster ageing birds were less likely to gamble while foraging. We measured biological ageing in starlings from the shortening of DNA sequences called telomeres. Birds’ whose telomeres shortened more had stronger preferences for a foraging option yielding a consistent amount of food over a variable amount. Why are some individuals more prone to gamble than others? Animals often show preferences between 2 foraging options with the same mean reward but different degrees of variability in the reward, and such risk preferences vary between individuals. Previous attempts to explain variation in risk preference have focused on energy budgets, but with limited empirical support. Here, we consider whether biological ageing, which affects mortality and residual reproductive value, predicts risk preference. We studied a cohort of European starlings (Sturnus vulgaris) in which we had previously measured developmental erythrocyte telomere attrition, an established integrative biomarker of biological ageing. We measured the adult birds’ preferences when choosing between a fixed amount of food and a variable amount with an equal mean. After controlling for change in body weight during the experiment (a proxy for energy budget), we found that birds that had undergone greater developmental telomere attrition were more risk averse as adults than were those whose telomeres had shortened less as nestlings. Developmental telomere attrition was a better predictor of adult risk preference than either juvenile telomere length or early-life food supply and begging effort. Our longitudinal study thus demonstrates that biological ageing, as measured via developmental telomere attrition, is an important source of lasting differences in adult risk preferences.
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影响因子：
4.1
作者：
Boyle PA;Yu L;Buchman AS;Laibson DI;Bennett DA
通讯作者：
Bennett DA
影响因子：
1.3
作者：
Alessi, SM;Petry, NM
通讯作者：
Petry, NM
老年人在风险决策中的个体差异反映了奖励敏感性的提高。
影响因子：
4.3
作者：
Cavanagh JF;Neville D;Cohen MX;Van de Vijver I;Harsay H;Watson P;Buitenweg JI;Ridderinkhof KR
通讯作者：
Ridderinkhof KR
DOI：
10.1098/rstb.2016.0438
发表时间：
2018-03-05
影响因子：
6.3
作者：
Bateson, Melissa;Nettle, Daniel
通讯作者：
Nettle, Daniel
影响因子：
2.3
作者：
CARACO, T
通讯作者：
CARACO, T