The relative importance of orange spot coloration and total length of males in female guppy mate preference
The relative importance of orange spot coloration and total length of males in female guppy mate preference
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DOI：
10.1007/s10641-008-9360-8
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发表时间：
2008-12-01
影响因子：
1.4
通讯作者：
Urano, Yoko
中科院分区：
文献类型：
--
作者：
Karino, Kenji;Urano, Yoko
多种雄性特征对雌性配偶的选择是动物行为学中的一个重要课题。然而，在大多数情况下，女性选择的多重线索的相对重要性并没有被探索。雌性孔雀鱼用橙色斑点的颜色饱和度和雄性的总长度作为选择配偶的标准。在本研究中，我们使用数字修改的视频回放来检验这两种男性特征对女性择偶偏好的相对重要性。我们初步研究了两幅刺激男性图像在橙色斑点的色彩饱和度以及总长度上的有效差异。只有当色彩饱和度差异较大时（91%对25%），女性才会对明亮的男性图像表现出强烈的偏好（与暗淡的图像相比）。相反，当雌性在两幅相对较小的雄性图像（全长26.0毫米和23.0毫米）之间做出选择时，它们只表现出对较大尺寸的偏好。当将两种性状均经过修改的雄性图像呈现给雌性时，雌性优先选择橙色斑点颜色饱和度较高的雄性图像，这表明雄性橙色斑点的颜色饱和度比总长度更重要。橙色斑点的颜色饱和度可能比它们的总长度更能向雌性传达关于雄性的可靠信息。这些发现表明，女性可能会根据各自择偶标准的相对收益或成本对多个男性标准进行排名。
Female mate choice by multiple male traits is an important current topic in animal behavior. However, the relative importance among the multiple cues in female choice is not explored in most cases. Female guppies Poecilia reticulata use both the color saturation of orange spots and the total length of males as mate choice criteria. In the present study, we used digitally modified video playbacks to examine the relative importance of these two male traits to female mate preferences. We initially examined the effective difference in the color saturation of orange spots as well as that in total length between two stimulus male images. Females only showed a strong preference for a bright male image (compared to the dull image) when the difference in color saturation was large (91% versus 25%). Conversely, females only exhibited a preference for larger size when they were presented a choice between two relatively small male images (total length 26.0 mm versus 23.0 mm). When two male images in which both the two traits were modified were presented to females, they prioritized male images possessing higher color saturation of orange spots, indicating the color saturation of male orange spots to be a more important factor than the total length in their mate choice. The color saturation of orange spots may convey more reliable information about the males to the females than their total lengths. These findings imply that females may rank multiple male criteria depending on relative benefits or costs derived from their mate choice based on each criterion.