Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Date (from‐to) : 2016/04 -2019/03
Author : Kobayashi Yasuhisa; YAMAMOTO Masayuki
Groupers of the genus Epinephelus are one of the most important aquaculture species in the world. The sexuality of groupers is almost protogynous hermaphrodite. Therefore, in general, males of a species are larger than females. Larger males in the wild have decreased remarkably in numbers, owing to overfishing so, although both males and females are essential for offspring production, collecting larger male groupers from the field is very difficult. In this study, we developed sex control method of groupers. Androgen treatment easily induced normal sex change in Longtooth grouper. However, it was not possible to induce reverse sex change (male-to-female) in Redspotted grouper. Therefore, it was considered that the sexual plasticity of grouper decreased after sex change.