Reddish male swallows have short sperm
Reddish male swallows have short sperm
复制标题
雄性燕子呈红色，精子较短
DOI：
10.1007/s10164-021-00726-x
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发表时间：
2021
影响因子：
0.9
通讯作者：
Nakamura Masahiko
中科院分区：
文献类型：
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作者：
Hasegawa Masaru;Arai Emi;Nakamura Masahiko
性选择有利于交配前的性特征(如装饰)和交配后的性特征(如长精子)的进化，但这两种类型的性特征之间的相互关系尚不清楚。在这里，我们使用日本谷仓燕子，Hirundo rustica gutturalis，和对Hirundinidae科的种间分析，检测了精子长度与基于Peomelanin的羽毛着色的关系。正如血黑素生成消耗抗氧化剂这一事实所预测的那样，红色(但不是其他装饰品)与物种内和物种之间的精子长度呈负相关，这表明这些特征之间存在进化上的权衡。
Sexual selection favors the evolution of pre-copulatory sexual traits such as ornamentation and post-copulatory sexual traits such as long sperm, but the interrelationships of the two types of sexual traits remain unclear. Here, using Japanese barn swallows,Hirundo rustica gutturalis,and an interspecific analysis of the family Hirundinidae,we examined sperm length in relation to pheomelanin-based plumage coloration. As predicted by the fact that pheomelanogenesis consumes antioxidants, which would be detrimental to develop long sperm, reddish coloration (but not other ornaments) were negatively related to sperm length both within and across species, suggesting an evolutionary tradeoff between these traits.