Nest construction and its effect on posthatching family life in the burying beetle Nicrophorus vespilloides

IF 2.3 2区 生物学 Q2 BEHAVIORAL SCIENCES
Eleanor K. Bladon, Rebecca M. Kilner
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Abstract

Through the effort required to construct them, the microenvironmental conditions they impose on the family and their indirect influence on posthatching care, nests play a key role in influencing family life. We combined experimental evolution with cross-fostering experiments on laboratory populations of Nicrophorus vespilloides to investigate three ways in which the nest can contribute more broadly to parental investment. We used replicate populations of N. vespilloides that had evolved for 42 generations under contrasting regimes of care. Populations were either able to supply posthatching care (‘Full Care’) or prevented from supplying any posthatching care (‘No Care’). Research on these populations has previously shown that the No Care populations evolved to build rounder nests, more rapidly, by Generation 14. Here we found (1) larvae raised by Full Care parents on nests prepared by parents from the No Care population did not attain a higher mass by the end of larval development than larvae in other treatments. However, we did discover that (2) cross-fostering nests between families consistently reduced larval mass, and to a similar extent whether nests were cross-fostered between or within the populations. We suggest that cross-fostering disrupted the chemical environment on and around the nest since we found no evidence that (3) nests mediate interactions between males and females. The duration of paternal care was consistently shorter than the duration of maternal care, and even shorter for males from the No Care populations than males from the Full Care populations. Nevertheless, the duration of male care did not predict variation in duration of female care. In short, although the nest is the substrate for burying beetle family life, we found little evidence that it had evolved divergently in our experimental populations to influence parental investment.

埋壳甲虫的巢建造及其对孵化后家庭生活的影响
通过建造巢穴所需的努力、巢穴对家庭施加的微环境条件以及巢穴对孵化后照料的间接影响,巢穴在影响家庭生活方面发挥着关键作用。我们将实验进化与栉水母(Nicrophorus vespilloides)实验室种群的交叉寄养实验相结合,研究了巢对亲代投资的三种更广泛的贡献方式。我们使用了在截然不同的照料制度下进化了42代的栉水母种群。这些种群要么能够提供孵化后照料("完全照料"),要么不能提供任何孵化后照料("无照料")。对这些种群的研究表明,到第 14 代时,"无照料 "种群的筑巢速度更快,巢也更圆。在这里,我们发现:(1) 全护理亲本在无护理种群亲本准备的巢中养育的幼虫,在幼虫发育末期的质量并不比其他处理中的幼虫高。然而,我们确实发现(2)家系间交叉培育的巢穴持续降低了幼虫质量,而且无论巢穴是在种群间交叉培育还是在种群内交叉培育,降低的程度都差不多。我们认为,交叉寄养破坏了巢内和巢周围的化学环境,因为我们没有发现(3)巢介导雄性和雌性之间相互作用的证据。父代照料持续时间一直比母代照料持续时间短,无照料种群的雄性照料持续时间甚至比完全照料种群的雄性照料持续时间短。然而,雄性照料持续时间并不能预测雌性照料持续时间的变化。总之,虽然巢是埋甲虫家庭生活的基质,但我们发现几乎没有证据表明,在我们的实验种群中,巢已经发生了影响父母投资的进化。
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来源期刊
Animal Behaviour
Animal Behaviour 生物-动物学
CiteScore
4.60
自引率
8.00%
发文量
236
审稿时长
10.2 weeks
期刊介绍: Growing interest in behavioural biology and the international reputation of Animal Behaviour prompted an expansion to monthly publication in 1989. Animal Behaviour continues to be the journal of choice for biologists, ethologists, psychologists, physiologists, and veterinarians with an interest in the subject.
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