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首页> 外文期刊>Ethology >Color-Based Association Among Heterospecifics in Lake Mala?ei Rock-Dwelling Cichlids
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Color-Based Association Among Heterospecifics in Lake Mala?ei Rock-Dwelling Cichlids

机译：基于颜色的马拉维湖岩石丽鱼科鱼异特异性之间的关联

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摘要

Female mate choice can be an imperfect barrier against hybridization. Among the cichlid fishes of the East African great lakes, sexual selection on male nuptial coloration has been noted as being particularly important for reproductive isolation among closely related lineages. Diversification of the rock-dwelling cichlids of Lake Mala?ei has led to a repeating pattern of color morphs wherein more distantly related species may look more similar than a more closely related pair. Using members of the Metriaclima zebra group and a heterogener, I tested the hypothesis that females would spend greater time associating with males more similarly colored to her species than females would with divergently colored, although more closely related males. Experimental results were consistent with this hypothesis, thus supporting the speculation and some field observation that mate choice can fail as a barrier to hybridization if a female encounters a distantly related male that shares the nuptial coloration of males of her own species and color morph. This notion is discussed in the broader context of both the adaptive and non-adaptive mechanisms that have been suggested to be important to the radiation of this group.
机译：女配偶的选择可能是不完美的杂交障碍。在东非大湖的丽鱼科鱼类中，已经注意到对雄性婚生动物的性选择对于在密切相关的世系之间进行生殖隔离特别重要。马拉菲湖中居住在岩石上的丽鱼科动物的多样化导致了颜色形态的重复模式，其中距离更近的物种比距离更近的物种更相似。我使用Metriaclima斑马族的成员和一个杂种动物，验证了一个假设，即与男性相比，与雌性颜色相似的雌性相比，与雌性颜色相似的雌性花费更多的时间，尽管雄性关系更密切。实验结果与此假设相吻合，因此支持了推测和一些现场观察，即如果雌性遇到远缘相关的雄性，而该雄性拥有自己种类的雄性和颜色变型，则选择配偶可能会成为杂交的障碍。在更广泛的范围内讨论了该概念，自适应和非自适应机制已被认为对辐射这一群体很重要。

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