Complex interactions between temperature, sexual signals and mate choice in a desert-dwelling jumping spider
Complex interactions between temperature, sexual signals and mate choice in a desert-dwelling jumping spider
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DOI：
10.1016/j.anbehav.2020.10.010
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发表时间：
2020-12-01
期刊：
影响因子：
2.5
通讯作者：
Elias, Damian O.
中科院分区：
文献类型：
--
作者：
Brandt, Erin E.;Rosenthal, Malcolm F.;Elias, Damian O.
环境背景是影响性沟通系统的一个关键因素。特别是在不能通过代谢调节体温的外温动物中，温度对这些种内相互作用有着巨大的影响。使用沙漠居住的跳蛛Habronattus clypeatus，我们评估了温度如何影响男性信号和女性择偶信号的各个部分。这些蜘蛛有多模态，时间结构的求偶显示，开始与视觉只有'侧行'显示，并进行多模态视觉和振动显示。为了研究温度效应，我们在两种温度处理下进行了连续选择交配实验（N = 45次试验）：热（类似于50摄氏度）和室温（类似于25摄氏度）。我们首先发现，求偶的不同阶段的变化分离到不同的主成分。雌性对雄性求偶的唯一偏好是侧行求偶，但仅在较高温度下。雌性也喜欢在任何温度下与较重的雄性交配。具体而言，女性更喜欢与男性进行较短的侧行显示。这也反映在热处理中交配时间较短。我们还发现温度只影响振动求爱，而不影响侧行求爱。我们的研究结果强调了理解环境背景在动物交流研究中的重要性。我们还强调如何全面，而不是还原，复杂的通信系统的方法是至关重要的，以了解如何选择对他们的行为。(C)2020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。
Environmental context is a crucial factor that influences sexual communication systems. Particularly in ectotherms, which cannot metabolically regulate their body temperature, temperature has an outsized effect on these intraspecific interactions. Using the desert-dwelling jumping spider Habronattus clypeatus, we assessed how temperature impacts various parts of the male signal and female mate choice for the signal. These spiders have multimodal, temporally structured courtship displays that begin with visual-only 'sidling' displays and proceed to multimodal visual and vibratory displays. To examine temperature effects, we performed sequential choice mating experiments (N = 45 trials) at two temperature treatments: hot (similar to 50 degrees C) and room temperature (similar to 25 degrees C). We found first that variation in the different stages of courtship segregated onto different principal components. The only aspect of male courtship that females expressed preference for was sidling courtship, but only at the higher temperature. Females also preferred to mate with heavier males at all temperatures. Specifically, females preferred to mate with males that performed shorter sidling displays. This is reflected by shorter copulation times in the warm treatment as well. We also found that temperature impacted only vibratory courtship and not sidling courtship. Our results highlight the importance of understanding environmental context in studies of animal communication. We also stress how a holistic, rather than reductive, approach to complex communication systems is vital in order to understand how selection acts upon them. (C) 2020 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.