00695naa#a2200181#i#450# EN\\bibl\45995 20241125000712.1 2073-5529 20210926b2021####ek#y0engy0150####ca RU OPTIMIZATION OF STAGES OF PRE-SPAWNING AND SPAWNING PERIODS OF TILAPIA IN COMMERCIAL GROWING Journal article Astrakhan Astrakhan State Technical University 2021 6 с. Journal article local Сельское хозяйство. Лесное хозяйство. Охота. Рыбное хозяйство. 63 Vasil'eva Ekaterina Gennad'evna Melnik Irina Viktorovna vestnik.astu.org