Mitrus Cezary, Mitrus Joanna, Sikora Magdalena
Department of Zoology, Rzeszów University, Zelwerowicza 4, 35-601 Rzeszów, Poland.
Zoolog Sci. 2012 Dec;29(12):795-9. doi: 10.2108/zsj.29.795.
Older red-breasted flycatcher males (after the second year) have an orange patch on the throat and breast. To date, the occurrence of this ornament has been explained in terms of male-male interactions. In this paper, we show that badge size also influences the mating success of red-breasted-flycatcher males. In addition to the size of the ornament, arrival time was a second factor related to the males' mating success, but no effects of body parameters such as wing length, tarsus length, and body mass were observed. Mated males arrived significantly earlier than unmated ones. The arrival time of males was negatively correlated to body mass and positively correlated to tarsus length but no relation to wing length or badge size was observed. No correlations between badge size and body parameters were observed. This ornament was evolved through sexual selection, with both male-male interaction and selection pressure arising from female preference for males with larger badges.
年龄较大的红胸姬鹟雄鸟（第二年之后）在喉部和胸部有一块橙色斑块。迄今为止，这种装饰物的出现一直是从雄鸟之间的相互作用方面来解释的。在本文中，我们表明斑块大小也会影响红胸姬鹟雄鸟的交配成功率。除了装饰物的大小外，到达时间是与雄鸟交配成功率相关的第二个因素，但未观察到诸如翅长、跗跖长和体重等身体参数的影响。已交配的雄鸟比未交配的雄鸟到达时间明显更早。雄鸟的到达时间与体重呈负相关，与跗跖长呈正相关，但未观察到与翅长或斑块大小有任何关系。未观察到斑块大小与身体参数之间存在相关性。这种装饰物是通过性选择进化而来的，雄鸟之间的相互作用以及雌性对具有较大斑块的雄鸟的偏好所产生的选择压力都起到了作用。
