Selective disappearance does not underlie age-related changes in trait repeatability in red squirrels
Selective disappearance does not underlie age-related changes in trait repeatability in red squirrels
复制标题
选择性消失并不是红松鼠性状重复性与年龄相关的变化的原因
DOI：
10.1093/beheco/araa136
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发表时间：
2021
影响因子：
2.4
通讯作者：
Boutin, Stan
中科院分区：
文献类型：
--
作者：
Martinig, April Robin;Mathot, Kimberley J;Lane, Jeffrey E;Dantzer, Ben;Boutin, Stan
了解个体之间可重复的行为差异（即动物个性）的原因和后果是行为和进化生态学研究的一个主要领域。最近，人们的注意力转向了解个体发育中重复性变化背后的过程，因为它们对种群有影响。我们评估了选择性消失（即差异死亡率）这一个体间机制在幼年北美红松鼠（Tamiasciurus hudsonicus）攻击性和活动重复性与年龄相关的变化中的相对重要性。我们观察到，由于个体差异较低，不同年龄阶段的攻击性重复性均出现与年龄相关的下降。尽管我们发现了攻击性方向选择的证据，但不足以消除个体间的差异。因此，攻击重复性的个体发生降低似乎并不是由于选择性消失造成的。相比之下，由于个体间活动差异较大，不同年龄段的活动重复性较高，但不支持根据活动选择性消失。综上所述，我们的结果表明，红松鼠性状重复性与年龄相关的变化并不是选择性消失的结果，而可能是个体内部发育过程的结果，例如发育轨迹的个体差异。
Understanding the causes and consequences of repeatable among-individual differences in behavior (i.e., animal personality) is a major area of research in behavioral and evolutionary ecology. Recently, attention has turned to understanding the processes behind changes in repeatability through ontogeny because of their implications for populations. We evaluated the relative importance of selective disappearance (i.e., differential mortality), an among-individual mechanism, in generating age-related changes in the repeatability of aggression and activity in juvenile North American red squirrels (Tamiasciurus hudsonicus). We observed age-related decreases in the repeatability of aggression across ages, arising from lower among-individual variance. Although we found evidence for directional selection on aggressiveness, it was insufficient to erode among-individual variance. Thus, ontogenetic decreases in the repeatability of aggression do not appear to be due to selective disappearance. In contrast, the repeatability of activity was higher across ages due to higher among-individual variance in activity, but there was no support for selective disappearance based on activity. Taken together, our results suggest that age-related changes in trait repeatability in red squirrels are not the result of selective disappearance and instead may be the result of within-individual developmental processes, such as individual differences in developmental trajectories.
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影响因子：
5.9
作者：
Bastille-Rousseau, Guillaume;Fortin, Daniel;Ouellet, Jean-Pierre
通讯作者：
Ouellet, Jean-Pierre
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DOI：
--
发表时间：
2012
期刊：
影响因子：
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作者：
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通讯作者：
E. Matthysen
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影响因子：
8.8
作者：
A. Martinig;A. McAdam;B. Dantzer;J. Lane;D. Coltman;S. Boutin
通讯作者：
S. Boutin
影响因子：
1.3
作者：
Japyassu, Hilton F.;Malange, Juliana
通讯作者：
Malange, Juliana
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DOI：
10.1101/594036
发表时间：
2019
期刊：
bioRxiv
影响因子：
--
作者：
Jack G. Hendrix;D. Fisher;A. Martinig;S. Boutin;B. Dantzer;J. Lane;A. McAdam
通讯作者：
A. McAdam