Since Alchian and Friedman firstly put forward market selection hypothesis in 1950s,the argument to this question has never been stopped.
正因如此,自Alchian和Friedman提出"市场选择假说"以来,对该问题的争论就从未停止过。
Several main hypotheses have been put forward to explain the evolutionary mechanism of color polymorphism in birds, including Disruptive Selection Hypothesis; Apostatic Selection Hypothesis etc.
鸟类羽色多态现象的进化机制假说主要有:分化选择假说、异类选择假说和非随机性交配假说等等。
