Regression biology of Acipenser baeri to western China and its biology

Studies on the domestication and its biology of Acipenser baeri to Haima spring in Gansu province of western China were conducted.After 180days culture,547 mm in average length,1.79 mm daily length gain,(0.498%) in instantaneous growth rate(IGRL),were obtained.IGRL was maintained higher than 0.8% when the water temperature were from 16.7 to 24.7 ℃,highest at 19.9 ℃(1.462%).For the weight,649 g in average weight,3.49 g in daily weight gain,1.81% in instantaneous growth rate(IGRw).IGRw was maintained higher than 3% when the water temperature were from 16.7 to 24.7 ℃,highest at 20.6 ℃(4.51%).The body weight-total length correlation equations of juvenile Acipenser baeri was W=0.000 4 L~(3.593 6)(r~2=0.998)(b3),that is to say the growth character of 1-year-old Acipenser baeri was that the growth of weight was faster than that of length.