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

据报道，在鱼类中只有五种发生了性别反转。本研究在三种雌雄同体的鱼类中证实了这一点：清洁濑鱼Labroides dimidiatus、铁锈天使鱼centrropyge ferrugata和品红斑背鱼Pictichromis porphyria。另一方面，我们的野外和水族馆实验强烈地表明，平头的西里伯斯（Celebes），随机交配和雌雄同体的物种，不会反向改变性别。我们认为性别反转的进化可能取决于每个物种的交配系统类型。

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.