It takes two peaks to tango: the importance of UVB and UVA in sexual signalling in jumping spiders
It takes two peaks to tango: the importance of UVB and UVA in sexual signalling in jumping spiders
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DOI：
10.1016/j.anbehav.2015.12.030
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发表时间：
2016-03
期刊：
影响因子：
2.5
通讯作者：
C. J. Painting;G. Rajamohan;Zhanqi Chen;Hua Zeng;Daiqin Li
中科院分区：
文献类型：
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作者：
C. J. Painting;G. Rajamohan;Zhanqi Chen;Hua Zeng;Daiqin Li
我们测试了双紫外峰在云霄跳蛛中的重要性。男性在UVB （280-315 nm）和UVA （315-400 nm）范围内有双峰。这两种紫外线信号都用于雌性选择配偶和雄性之间的互动。UVA信号，而不是UVB信号，用于性别识别。UVA的去除导致了相互作用过程中行为的明显变化。色彩鲜艳的雄性装饰物，如鸟类鲜艳的羽毛或蝴蝶华丽的翅膀图案，可以突出携带者的健康，并通过雌性配偶选择和/或直接的雄性竞争来进行性选择。许多物种的雄性都有反射紫外线的标记（紫外线：波长280-400纳米）。最近，研究集中在UVA （315-400 nm）或UVB反射（280-315 nm）在种内通信中的作用，但UVA和UVB颜色在性信号中的具体重要性仍未被探索。在这里，我们使用一种两性二态的跳蛛（Salticidae） Cosmophasis umbratica来解决这个问题，其中雄性具有UVA和UVB反射斑。通过进行一系列雌性配偶选择和雄性雄性相互作用试验，并操纵UVA和UVB的颜色，我们提供了第一个证据，证明这两种紫外线成分都是种内交流的先决条件。此外，长波紫外线（UVA）而非中波紫外线（UVB）是两性都专门用于性别识别的，这一点可以从蜘蛛在遇到移除长波紫外线的同种蜘蛛时明显而意想不到的行为变化中看出。本研究揭示了双紫外峰在雄性纹饰中存在的适应性意义。
HighlightsWe test the importance of dual UV peaks in Cosmophasis umbratica jumping spiders.Males have dual peaks in the UVB (280–315 nm) and UVA (315–400 nm) range.Both UV signals are used during female mate choice and male–male interactions.UVA signals, but not UVB signals, are used in sex recognition.UVA removal led to distinct changes in behaviour during interactions.Colourful male ornaments such as the bright plumage of birds or flashy wing patterns of butterflies serve to highlight the fitness of the bearer and are subject to sexual selection via female mate choice and/or direct male–male competition. Males of many species have markings that reflect ultraviolet (UV: wavelengths 280–400 nm). Recently, studies have focused on the role of either UVA (315–400 nm) or UVB reflectance (280–315 nm) in intraspecific communication, but the specific importance of UVA and UVB colours in sexual signalling remains unexplored. Here, we address this using Cosmophasis umbratica, a sexually dimorphic jumping spider species (Salticidae) in which males possess both UVA and UVB reflective patches. By conducting a series of female mate choice and male–male interaction trials with manipulated UVA and UVB coloration of males, we provide the first evidence that both UV components are prerequisites for intraspecific communication. Furthermore, UVA but not UVB is specifically used by both sexes for sex recognition, as shown by distinct, unexpected changes in behaviour by spiders encountering conspecifics with UVA removed. Our study revealed the adaptive significance of the presence of dual UV peaks in male ornamentation.