Independent effects of familiarity and mating preferences for ornamental traits on mating decisions in guppies
Independent effects of familiarity and mating preferences for ornamental traits on mating decisions in guppies
复制标题
观赏性状的熟悉度和交配偏好对孔雀鱼交配决策的独立影响
DOI：
10.1093/beheco/arl026
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发表时间：
2006
影响因子：
2.4
通讯作者：
R. Brooks
中科院分区：
文献类型：
--
作者：
S. Zajitschek;J. Evans;R. Brooks
避免熟悉的个体作为配偶可以最大限度地发挥一妻多夫制的好处，或者可能有助于减少小群体或高度亲民群体的近亲繁殖。由于以前的配偶也很熟悉，熟悉和交配历史的影响往往会混淆。在这里，我们解开这些影响的孔雀鱼，孔雀鱼的交配决定，并研究其对性选择的影响。在3个实验中，雄性和雌性1）能够交配，2）具有视觉和嗅觉接触，或3）仅具有视觉接触。熟悉成功地获得通过视觉线索，和女性在所有情况下更有可能与陌生的交配比熟悉的男性，这表明，熟悉是一个更重要的决定因素，交配结果比交配历史。男性并没有追求陌生的女性比熟悉的女性更多，也没有差异分配精子。熟悉并没有改变男性着色的性选择的力量：我们发现整体积极选择明亮，大的男性。因此，雌性对陌生雄性和观赏性状的偏好可能在很大程度上是独立的。版权所有2006年。
The avoidance of familiar individuals as mates can act to maximize the benefits of polyandry or might help to minimize inbreeding in small or highly philopatric populations. As previous mates are also familiar, the effects of familiarity and mating history can often be confounded. Here, we disentangle these effects on mating decisions in the guppy, Poecilia reticulata, and examine their influence on sexual selection. In 3 experiments, males and females were 1) able to mate, 2) had visual and olfactory contact, or 3) had visual contact only. Familiarity was successfully acquired via visual cues, and females were in all cases more likely to mate with unfamiliar than with familiar males, indicating that familiarity is a more important determinant of mating outcome than mating history. Males did not court unfamiliar females any more than familiar females and did not differentially allocate sperm. Familiarity did not alter the strength of sexual selection on male coloration: we found overall positive selection for bright, large males. Female preferences for unfamiliar males and ornamental traits may therefore be largely independent. Copyright 2006.