TY - JOUR AU - Mosyagina, Marina AU - Zelennikov, Oleg PY - 2015/09/25 Y2 - 2024/03/28 TI - Development of steroid-producing cells in pink salmon and lamprey fries during gonadal sex differentiation JF - Biological Communications JA - BioComm VL - 0 IS - 3 SE - Full communications DO - 10.21638/spbu03.2015.303 UR - https://biocomm.spbu.ru/article/view/851 SP - 36–45 AB - <p>A comparative study of the first stages of gametogenesis and ultrastructure of steroid-secretory cells in the gonads of juvenile pink salmon and lamprey was performed. In individuals of both species the gonad development is accompanied by natural sex change. It has been shown that increasing of the number and activity of steroid-producing cells in the testes coincides with resorption of previtelligenous oocytes. In the ovaries there is a gradual increase in the activity of steroid-producing cells and change of their localization from stroma towards follicular layers of oocytes. Based on these results we can conclude that the described processes are similar in taxonomically different species. Refs 21. Figs 3. Tables 2.</p> ER -