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Li W.,Endemic Fishes Research Institute of Heilongjiang Province | Shi Z.,Endemic Fishes Research Institute of Heilongjiang Province | Wang Y.,Endemic Fishes Research Institute of Heilongjiang Province | Liu J.,Endemic Fishes Research Institute of Heilongjiang Province | And 3 more authors.
Journal of Applied Ichthyology | Year: 2011

Ten females of Kaluga sturgeon (Huso dauricus; 73.8± 6.49kg, total length 204.5±12.8cm) matured for the first time after a full life-cycle in captivity. Absolute gonad biomass was 8.4±1.3kg per female and relative fecundity 11.2± 1.6%, at maturation stage IV. These fish were induced to spawn by injection of hormone LHRH-A2 at a dosage of 10μgkg-1. Male Kaluga was injected one time at 5μgkg-1 and milt was stripped 16h after injection of LHRH-A2. Water temperature was about 16±1°C during the induction period. Fertile eggs were obtained 36.8±2.6h after first injection; they were fertilized by semi-dry method. Fertilization rate was 80.7±3.8%. Fertilized eggs were incubated McDonald jars (hatching rate 85.2±9.8%). There was a strong correlation between body weight (x) and time (y) needed from hormone injection to obtaining fertile oocytes (y=-0.8231x+98.838 R2=0.8428; P<0.01). The cultured males ripened as early as at age 5 while females were 8-years old at first maturity. © 2011 Blackwell Verlag, Berlin.

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