Social determination of sex in fishes : testing reversed sex change under low density conditions

在野外，只有五种鱼类报告了逆转的性别变化。在本研究中，我们证实了这三个一夫多妻制和protogynous鱼：清洁濑Labroides dimidiatus，生锈的神仙鱼Centropyge ferrugata，和洋红色dottyback Pictichromis卟啉症。另一方面，我们的实地和水族馆实验强烈表明，西里伯斯平头Thysanophrys celebica，随机交配和雄性先熟的物种，不会改变性别的相反方向。我们认为，逆转性变的进化可能取决于每个物种的交配系统的类型。

Reversed sex change in the field has been reported in only five species among fishes. In the present study, we confirmed this in three polygynous and protogynous fishes : the cleaner wrasse Labroides dimidiatus, the rusty angelfish Centropyge ferrugata, and the magenta dottyback Pictichromis porphyria. On the other hand, our field and aquarium experiments strongly suggest that the Celebes flathead Thysanophrys celebica, random-mating and protandrous species, will not change sex in the reverse direction. We suggest that the evolution of reversed sex change may depend on the type of mating system of each species.