METHOD TO OBTAIN PISCINE HYBRIDS Russian patent published in 1998 - IPC

FIELD: fish breeding. SUBSTANCE: testosterone propionate solution is introduced as stimulating preparation into a reservoir full with fishes which are at the fourth stage of sexual products maturity. Solution is introduced twice daily in 12 hours directly into the water at a quantity to provide its aqueous concentration of 3×10^-12 m/l to 3×10^-14 m/l. Method enables to provide natural spawning of piscine producers, gobies especially, as a result of which caviar of one piscine type is impregnated with a sperm of another piscine type. EFFECT: more simplified method of fish breeding, higher efficiency to avoid a stress in fishes. 1 tbl