Development of steroid-producing cells in pink salmon and lamprey fries during gonadal sex differentiation

  • Marina Mosyagina St. Petersburg State Academy of Veterinary Medicine, 5, Chernigovskaya ul., St. Petersburg, 196084, Russian Federation
  • Oleg Zelennikov Saint Petersburg State University, 7–9, Universitetskaya nab., Saint Petersburg, 199034, Russian Federation


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.


steroid-producing cells, early gametogenesis, pink salmon, lamprey, protogynous sex change


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How to Cite
Mosyagina, M., & Zelennikov, O. (2015). Development of steroid-producing cells in pink salmon and lamprey fries during gonadal sex differentiation. Biological Communications, (3), 36–45.
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