Plasticity in social behaviour varies with reproductive status in an avian cooperative breeder

Plasticity in social behaviour varies with reproductive status in an avian cooperative breeder
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鸟类合作饲养者的社会行为可塑性随繁殖状况而变化

DOI:
10.1098/rspb.2022.0355
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发表时间:
2022
期刊:
Proceedings of the Royal Society B: Biological Sciences
影响因子:
--
通讯作者:
Guindre-Parker, Sarah
Guindre-Parker, Sarah
中科院分区:
--
文献类型:
--
作者:
Little, Jasmine;Rubenstein, Dustin R.;Guindre-Parker, Sarah

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合作繁殖的脊椎动物在不可预测的环境中是很常见的,在这种环境中,照顾后代的成本和收益是暂时波动的。为了平衡这些适应性结果,合作繁殖物种的个体通常会根据环境条件表现出行为可塑性。尽管合作行为的个体差异已经得到了很好的研究,但对社会行为可塑性的差异却知之甚少。在这里,我们研究了合作繁殖的超级椋鸟(Lamprotornis superbus)的巢保护行为的适应性,可塑性和重复性。在证明了所有繁殖者和帮助者共同在一个巢穴中进行的累积鸟巢保护是繁殖成功的重要预测因子之后,我们建立了繁殖者和帮助者行为反应规范的模型,以验证个体在高降雨量的有利季节投入更多的保护的假设。不同繁殖状态的个体护巢行为在不同季节的变化有所不同:繁殖者对降雨表现出塑料护巢行为,而帮手则没有。同样,我们发现个体繁殖者在保护巢穴的行为中表现出可重复性和一致性,而个体帮助者则没有。因此,有可能获得直接适应性利益的个体在合作行为中表现出更大的可塑性和个体水平的可重复性。
Cooperatively breeding vertebrates are common in unpredictable environments where the costs and benefits of providing offspring care fluctuate temporally. To balance these fitness outcomes, individuals of cooperatively breeding species often exhibit behavioural plasticity according to environmental conditions. Although individual variation in cooperative behaviours is well-studied, less is known about variation in plasticity of social behaviour. Here, we examine the fitness benefits, plasticity and repeatability of nest guarding behaviour in cooperatively breeding superb starlings (Lamprotornis superbus). After demonstrating that the cumulative nest guarding performed at a nest by all breeders and helpers combined is a significant predictor of reproductive success, we model breeder and helper behavioural reaction norms to test the hypothesis that individuals invest more in guarding in favourable seasons with high rainfall. Variation in nest guarding behaviour across seasons differed for individuals of different reproductive status: breeders showed plastic nest guarding behaviour in response to rainfall, whereas helpers did not. Similarly, we found that individual breeders show repeatability and consistency in their nest guarding behaviour while individual helpers did not. Thus, individuals with the potential to gain direct fitness benefits exhibit greater plasticity and individual-level repeatability in cooperative behaviour.
DOI: --
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