男人的鬍鬚
孔雀的彩屏
雄性荷爾蒙的功勞作者: 在美一方 時間: 2012-3-21 10:37
達爾文頭痛不已?他提出的性選擇理論啊 作者: 在美一方 時間: 2012-3-21 10:39
The sexual struggle is of two kinds; in the one it is between individuals of the same sex, generally the males, in order to drive away or kill their rivals, the females remaining passive; whilst in the other, the struggle is likewise between the individuals of the same sex, in order to excite or charm those of the opposite sex, generally the females, which no longer remain passive, but select the more agreeable partners.
--Darwin, C. (1871) The Descent of Man and Selection in Relation to Sex作者: 漢紳 時間: 2012-3-21 11:06
哈哈,研究出來了
是為了保護女孔雀
在天敵出現時,把心愛的 蛋它媽 蓋在下面
另一位英國生物學家漢密爾頓(W. D. Hamilton, 1936~2000)認為,長尾巴並非失控的結果,而是雄鳥在向雌鳥炫耀自己有好的基因:你看,我身體多麼健康,這麼笨重的尾巴我都負擔得起!我身上沒有寄生蟲(如果有寄生蟲,羽毛就會黯淡無光甚至脫落),放心,我不會把寄生蟲傳給你和我們的兒女。而且,我天生對寄生蟲特別有抵抗力,我們的兒女也會像我一樣!