Sexually selected UV signals in the tropical ornate jumping spider, Cosmophasis umbratica may incur costs from predation.
Sexually selected UV signals in the tropical ornate jumping spider, Cosmophasis umbratica may incur costs from predation.
复制标题
DOI：
10.1002/ece3.1419
复制
发表时间：
2015-02
影响因子：
2.6
通讯作者：
Li, Daiqin
中科院分区：
文献类型：
--
作者：
Bulbert, Matthew W.;O'Hanlon, James C.;Zappettini, Shane;Zhang, Shichang;Li, Daiqin
如果性选择的装饰品和信号在非生殖环境中适应不良，那么维持它们的成本就会很高。跳蛛 Cosmophasis umbratica 表现出明显的两性二色性，雄性表现出精致的紫外线身体标记，表明雄性品质。雌性 C. umbratica 对反射紫外线的雄性反应良好，并忽略紫外线被遮蔽的雄性。然而，Portia labiata 是一种对紫外线敏感的食蜘蛛专家，也是 C. umbratica 的天然捕食者，众所周知，它在捕猎猎物时会使用紫外线反射作为线索。我们研究了 C. umbratica 中这些紫外线信号的捕食风险成本。在实验条件下，向 P. labiata 个体呈现三种选择场景。 P. labiata 在有或没有 UV 信号的雄性 C. umbratica 之间进行选择；反射紫外线的雄性和不反射紫外线的雌性；以及遮蔽紫外线的男性和女性。使用滤光片来控制紫外信号的存在和不存在。 Portia labiata 对 UV+ 个体表现出强烈的偏好。这些结果表明，紫外线反射率的性选择特征增加了雄性对紫外线敏感的捕食者的可见度。这种雄性特有的紫外线信号的程度可能会受到捕食压力的调节。但有趣的是，无论是否存在紫外线反射，P. labiata 仍然更喜欢雄性而不是雌性。这表明，当检测紫外线反射率的条件不理想时，P. labiata 可以切换线索。
Sexually selected ornaments and signals are costly to maintain if they are maladaptive in nonreproductive contexts. The jumping spider Cosmophasis umbratica exhibits distinct sexual dichromatism with males displaying elaborate UV body markings that signal male quality. Female C. umbratica respond favorably to UV-reflecting males and ignore males that have their UV masked. However, Portia labiata, a UV-sensitive spider-eating specialist and a natural predator of C. umbratica, is known to use UV reflectance as a cue when hunting prey. We investigated the cost of these UV signals in C. umbratica in terms of their predation risk. Under experimental conditions, three choice scenarios were presented to P. labiata individuals. Choices by P. labiata were made between male C. umbratica with and without the UV signal; a UV-reflecting male and non-UV-reflecting female; and a UV-masked male and female. The presence and absence of UV signals was manipulated using an optical filter. Portia labiata exhibited a strong bias toward UV+ individuals. These results suggest the sexually selected trait of UV reflectance increases the visibility of males to UV-sensitive predators. The extent of this male-specific UV signal then is potentially moderated by predation pressure. Interestingly though, P. labiata still preferred males to females irrespective of whether UV reflectance was present or not. This suggests P. labiata can switch cues when conditions to detect UV reflectance are not optimal.
登录
查看更多内容
DOI：
10.1007/s00359-006-0116-7
发表时间：
2006-08-01
影响因子：
2.1
作者：
Elias, Damian O.;Land, Bruce R.;Hoy, Ronald R.
通讯作者：
Hoy, Ronald R.
DOI：
10.1098/rspb.2006.0020
发表时间：
2007-02-22
影响因子：
4.7
作者：
Lim, Matthew L. M.;Li, Daiqin
通讯作者：
Li, Daiqin
DOI：
10.1007/s003590000143
发表时间：
2000-09-01
影响因子：
2.1
作者：
Nakamura, T;Yamashita, S
通讯作者：
Yamashita, S
影响因子：
2.5
作者：
Hoefler, CD;Jakob, EM
通讯作者：
Jakob, EM
DOI：
10.1111/j.1095-8312.2006.00704.x
发表时间：
2006-11-01
影响因子：
1.9
作者：
Lim, Matthew L. M.;Li, Daiqin
通讯作者：
Li, Daiqin