TY JOUR TI EXPERIENCE OF USING THE PITUITARY GLAND OF THE CATFISH IN THE SPAWNING CAMPAIGN OF CARP KW pituitary gland KW spawning campaign KW carp KW eggs KW sperm KW fish reproductive products KW spawning JO Vestnik of Omsk SAU AU LIPPO, I.E. AU KITAEV, I.A. AU BRIGIDA, A.V. PY 2024 IS 56 PB FSBEI HE Omsk SAU