MATE CHOICE BASED UPON NATURALLY-OCCURRING COLOR-PATTERN VARIATION IN A GUPPY POPULATION
MATE CHOICE BASED UPON NATURALLY-OCCURRING COLOR-PATTERN VARIATION IN A GUPPY POPULATION
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DOI：
10.1111/j.1558-5646.1987.tb05766.x
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发表时间：
1987-01-01
期刊：
影响因子：
3.3
通讯作者：
HOUDE, AE
中科院分区：
文献类型：
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作者：
HOUDE, AE
这项研究测试了雄性孔雀鱼颜色模式中橙色色素程度的差异对雌性孔雀鱼的性反应的影响。这项研究中使用的鱼是特立尼达帕里亚河单一自然种群的后代。这一群体中的雄性黑猩猩身上有非常大的明亮的橙色斑点。我使用了三种实验方法，根据橙色图案中橙色的相对面积来测试女性对男性的歧视：1)当男性被呈现给处女女性时的交配时间；2)女性对经过、不显示的男性的性反应频率；以及3)男性的S求偶表现引发女性性反应的比例。在所有三个实验中，雌性似乎都歧视雄性，因为它们的颜色图案中橙色的数量低于平均水平。然而，在至少一项实验中，随着橙色量的增加，女性反应性的增加趋于平稳，而且在橙色程度较高时可能会降低。这表明，增加橙色的量超过一定的水平可能没有好处。这些结果表明，雌性的选择是孔雀鱼颜色模式进化的一种机制，可能是导致帕里亚种群独特的颜色模式的原因。
This study tested the effect of differences in the extent of orange pigment in the color pattern of male guppies on the sexual responsiveness of females. Fish used in this study were descendants of a single natural population from the Paria River of Trinidad. Males from this population have unusually large, brilliant orange spots. I used three experimental approaches to test for discrimination by females among males based on the relative area of orange in color patterns: 1) the time to mating when a male was presented to a virgin female; 2) the frequency of sexual responses of females to passing, nondisplaying males; and 3) the proportion of a male''s courtship displays that elicited a female sexual response. In all three experiments, females appeared to discriminate against males with less-than-average amounts of orange in their color patterns. In at least one experiment, however, the increase in female responsiveness with increasing amounts of orange leveled off and possibly decreased at high levels of orangeness. This suggests that there may be no advantage of increased amounts of orange above a certain level. These results suggest that female choice is a mechanism for the evolution of color patterns in guppies and may have contributed to the distinctive color pattern of the Paria population.