The relationship between personality and plasticity in tree swallow aggression and the consequences for reproductive success
The relationship between personality and plasticity in tree swallow aggression and the consequences for reproductive success
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DOI：
10.1016/j.anbehav.2011.10.018
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发表时间：
2012-01-01
期刊：
影响因子：
2.5
通讯作者：
Norris, D. Ryan
中科院分区：
文献类型：
--
作者：
Betini, Gustavo S.;Norris, D. Ryan
个性和可塑性都可以影响健康，但很少有研究同时调查这两种个体差异的来源。个体素质假说认为，人格得分高的个体也能更好地应对环境的变化（即具有高度的可塑性）。另外，“补偿性”假说提出，个性和可塑性是负相关的，因为只有个性得分低的个体才需要能够迅速适应环境条件。为了检验这两个假设，我们调查了整体水平的侵略性（个性）在巢防御，个人的能力，以调整这种行为，以应对温度的变化（可塑性），其后果为繁殖成功的男性和女性树燕子，Tachycineta双色。使用线性混合效应模型与个人作为随机效应，我们发现，个体之间的一致差异解释了大约55%的侵略性变化，更具侵略性的个体能够更好地适应温度的变化，为个人质量假设提供了支持。然而，虽然更具侵略性的男性往往会有更多的年轻人，可塑性的程度只赋予了非侵略性的男性生殖优势，提供支持的补偿假说。对于女性来说，个性和可塑性都不是生殖成功的良好预测因素。我们的研究结果表明，个性和可塑性的侵略性是个体变异的重要组成部分，但每个健身优势是上下文相关的。(C)2011年，动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
Both personality and plasticity can influence fitness, but few studies have investigated these two sources of individual variation simultaneously for the same behaviour. The individual quality hypothesis proposes that individuals with high personality scores will also be better able to respond to the changes in the environment (i.e. have a high degree of plasticity). Alternatively, the 'compensatory' hypothesis proposes that personality and plasticity are negatively correlated, because only individuals with low personality scores need to be able to rapidly adjust to environmental conditions. To examine these two hypotheses, we investigated the overall level of aggressiveness (personality) in nest defence, the ability of individuals to adjust this behaviour to respond to changes in temperature (plasticity), and their consequences for reproductive success in male and female tree swallows, Tachycineta bicolor. Using linear mixed effect models with individual as a random effect, we found that consistent differences between individuals explained approximately 55% of variation in aggressiveness and that more aggressive individuals were better able to adjust to variation in temperature, providing support for the individual quality hypothesis. However, although more aggressive males tended to fledge a higher number of young, the degree of plasticity only conferred a reproductive advantage for nonaggressive males, providing support for the compensatory hypothesis. For females, neither personality, nor plasticity was a good predictor of reproductive success. Our results suggest that personality and plasticity in aggressiveness are important components of individual variation but that the fitness advantages of each are context dependent. (C) 2011 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.