[Light effect at various wavelengths on gametogenesis of the Black Sea sea urchin (Strongylocentrotus nudus)].

Comparative study of the effect of light at wavelengths of 720 and 520 nm on the reproductive process in black sea urchin Strongylocentrotus nudus was performed in artificial conditions. The results obtained not only suggest the distinct influence of light on the reproductive process in sea urchin, but also indicate that its effects on oogenesis and spermatogenesis are different. Light at the wavelength of 720 nm was found to activate gonad development, while at the wavelength of 520 nm it had a suppressive effect by decreasing the oogonial and spermatogonial content without disturbing their cellular structure. It is proposed that the gametes which are formed in sea urchins that are exposed to the light with differing wavelengths may possess different capacities for reproduction, thus influencing the viability of the young.