Female choice selects for a viability-based male trait in pheasants
Female choice selects for a viability-based male trait in pheasants
复制标题
雉鸡的雌性选择选择基于生存能力的雄性特征
作者：
T. Schantz;G. Göransson;Gunilla Andersson;Inger Fröberg;M. Grahn;A. Helgée;H. Wittzell
最近关于性选择的理论1 -4表明，在没有父亲照顾的物种中，雌性通过第二性征选择配偶，因为这些特征表明基因型质量将传递给后代。这些想法还没有得到实证支持，因为缺乏量化女性择偶和女性生殖成功之间关系的数据。只有在一种情况下，在Colias蝴蝶中，已经明确证明了雌性选择“好基因型”作为配偶5，只有一项研究，果蝇，证明配偶选择增加了后代健康的一个组成部分6。雄性雉鸡（Phasianus colchicus）的马刺长度与各种健身相关的属性7。我们在这里提出的第一个实验场的数据表明，雌性野鸡选择配偶的基础上，男性的马刺长度和女性的择偶与女性生殖成功。
Recent theory on sexual selection1–4 suggests that females in species without paternal care choose mates by their secondary sexual characters because these indicate genotypic quality which will be transmitted to the offspring. These ideas are not yet empiri-cally supported as data quantifying the relationship between female mate choice and female reproductive success are lacking. Only in one case, in Colias butterflies, has it been demonstrated unequivo-cally that females choose 'good genotypes' as mates5 and there is only one study, on Drosophila, demonstrating that mate choice increases one component of offspring fitness6. Spur length of male pheasants (Phasianus colchicus) correlates with various fitness-related properties7. We here present the first experimental field data showing that female pheasants select mates on the basis of male spur length and that female mate choice correlates with female reproductive success.