Adaptive changes in supporting cells of olfactory epithelium in fishes during their spawning period

  • Klimenkov I.V. 1
  • Sudakov N.P. 1
  • Pastukhov M.V. 2
  • Kositsyn N.S. 3
  • 1 Limnological Institute, Siberian Branch, Russian Academy of Sciences, 3 Ulan-Batorskaya St., Irkutsk, 664033, Russia.
    2 Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences, 1a Favorsky St., Irkutsk, 664033, Russia.
    3 Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 5a Butlerova St., Moscow, 117485, Russia.
Keywords: olfactory epithelium, supporting cells, mitochondria, secretion, spawning


This research was devoted to studying the olfactory system adaptation mechanisms in fishes during their spawning period. For this purpose, the morpho-functional changes of supporting cells in the olfactory epithelium were analyzed by electron transmission and laser confocal microscopy. We have indicated that active mitochondria are concentrated in the apical zone of ciliated supporting cells. This position of mitochondria is important for the energy supply of cilia to enhance the olfactory mucus circulation. Moreover, there was an increase in mucous supporting cells secretory activity. Generally, identified changes in olfactory epithelium aim to raise the effectiveness of sex pheromone reception during the spawning period.