Effects of age and feeding history on structure-based UV ornaments of a jumping spider (Araneae: Salticidae)
Effects of age and feeding history on structure-based UV ornaments of a jumping spider (Araneae: Salticidae)
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DOI：
10.1098/rspb.2006.0020
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发表时间：
2007-02-22
影响因子：
4.7
通讯作者：
Li, Daiqin
中科院分区：
文献类型：
--
作者：
Lim, Matthew L. M.;Li, Daiqin
最近的研究表明，鸟类雌性有时会根据紫外线（UV，小于400 nm）反射的条件依赖性变化来选择配偶，但对无脊椎动物的类似研究很少。然而，许多无脊椎动物有紫外线结构着色。在这里，我们调查Cosmopolyumbratica，跳蛛（蜘蛛目：跳蛛科），具有性二态的UV-虹彩reprodentation，我们提供的证据表明，男性的UV着色是条件依赖于这个物种。光谱反射模式的变化与男性的年龄和以往的喂养史。的位置的UV波段（即UV色调）的甲壳的年轻（现场收集的亚成体和成熟的成年人在实验室）男性转移，相对于老年人（现场收集的成年人）男性，显着向较长的波长。食物剥夺显着降低了腹部的光谱强度，但不是甲壳。紫外线装饰物的变化机制的问题突出，是假设条件依赖的紫外线变化的作用，在男性与男性的竞争和作为一个标准时，女性的择偶决定。
Recent studies have shown for birds that females sometimes choose mates on the basis of condition-dependent variation in ultraviolet (UV, less than 400 nm) ornamentation, but there have been few comparable studies on invertebrates. Yet many invertebrates have UV structural coloration. Here, we investigate Cosmophasis umbratica, a jumping spider (Araneae: Salticidae) that has sexually dimorphic UV-iridescent ornamentation, and we provide evidence that male UV coloration is condition dependent in this species. Spectral-reflection patterns change with male age and prior feeding history. The position of the UV band (i.e. UV hue) of the carapaces of younger (field-collected as subadults and matured as adults in laboratory) males shifted, relative to older (field-collected as adults) males, significantly towards longer wavelengths. Food deprivation significantly decreased the spectral intensity of the abdomen, but not the carapace. Questions concerning the mechanisms by which UV ornaments change are highlighted, as are hypotheses concerning the role of condition-dependent UV variation in male-male competition and as a criterion used by females when making mate-choice decisions.