A research team led by Oki Hayasaka, a graduate student at Kagoshima University's graduate school (1st year doctoral student), announced the results of an experiment in which females change to males when medaka is bred while shining green light.The research results were compiled by the faculty of fisheries research team as a paper and published in the British magazine "Scientific Reports" (February 2).
So far, it has been reported that sex change is induced in some fish by environmental stress such as high water temperature and extreme pH change, but the effect of specific light wavelength irradiation on sexual differentiation has been reported. It was not known.
This time, the sex change from female to male was induced by continuously irradiating the medaka in the sexual differentiation stage with green light wavelength and breeding it.In addition, when transsexual individuals and normal females were individually distributed, the next generation became all females.
This is the first report on the effects of specific light wavelengths on animal sex.In the future, it will be necessary to clarify whether a specific light wavelength is stressful and induces sex change, or whether it is a new mechanism.
It is expected that the sex control technology developed in this research can contribute to efficient aquaculture production.
Paper information:[Scientific Reports] Green light irradiation during sex differentiation induces female-to-male sex reversal in the medaka Oryzias latipes
