Data for: Assortative mating in an ecological context: Effects of mate choice errors and relative species abundance on the frequency and asymmetry of hybridization

The frequency and asymmetry of mixed-species mating set the initial stage for the ecological and evolutionary implications of hybridization. How such patterns of mixed-species mating, in turn, are influenced by the combination of mate choice errors and relative species abundance remain largely unknown. We develop a mathematical model that generates predictions for how relative species abundances and mate choice errors affect hybridization patterns. When mate choice errors are small (&lt;5%) the highest frequency of hybridization occurs when one of the hybridizing species is at low abundance, but when mate choice errors are high (&gt;5%) the highest hybridization frequency occurs when species occur in equal proportions. Furthermore, females of the less abundant species are overrepresented in mixed-species matings. We compare our theoretical predictions with empirical data on naturally hybridizing Ficedula flycatchers and find that hybridization is highest when the two species occur in eq...异种交配的频率与不对称性，为探究杂交的生态学与进化学效应确立了初始研究场景。这类异种交配模式反过来如何受到择偶错误与物种相对丰度共同作用的影响，目前仍未得到充分阐明。我们构建了数学模型，用于预测物种相对丰度与择偶错误对杂交模式的影响规律。当择偶错误率较低（<5%）时，最高杂交频率出现在其中一个杂交物种丰度偏低的场景；而当择偶错误率较高（>5%）时，最高杂交频率则出现在两物种丰度相等的情况。此外，丰度较低的物种的雌性个体在异种交配中的占比偏高。我们将理论预测结果与自然杂交的姬鹟属（Ficedula）鸟类的实测数据进行对比后发现，当两物种丰度相等时，杂交发生频率最高……