【摘要】 20 0 0年 3～ 5月 ,收集洞庭湖黄颡鱼 1 5 5尾 ,对其生物学特性进行研究。结果表明 ,黄颡鱼鳍式为D Ⅱ ,2～ 6,A 1 9～ 2 2 ,主要以虾、小型底栖鱼类、软体动物为食。体重 (W :g)与体长 (L :cm)关系为 :W =7 9861× 1 0 -2 L2 4471;体长生长方程为Lt=2 3 0 482 [1 -e-0 592 8(t+ 0 13 54) ];体重生长方程为 :Wt=3 68 3 90 9[1 -e-0 592 8(t+ 0 13 54) ]3 。生长速度以 1～ 2龄最快 ,以后逐步减慢 ,绝对繁殖力为 1 3 45～ 72 0 8粒 ,相对繁殖力为 48～ 78 3粒 g。繁殖力系数F =1 1 5 4977L1 453 9;性成熟年龄为 1 + 龄 ,自然性成熟雌鱼W =3 0 67g,L =1 0 2 9cm ,黄颡鱼人工养殖宜用 2年生产周期。更多还原

【Abstract】 specimens of Pelteobagrus fulvidraco were collected from March to May in 2000 and their biological characteristics were studied. The result showes that the fin type of P.fulvidraco is D.Ⅱ,2-6; A.19-22; the main preys of the adults are shrimps, small benthic fishs and mollusk. The body length growth can be expressed as the formula: L t23.048 2[1-e -0.5928(t+0.1354)]. The Body weight growth can be expressed as the formula: W t 368.390 9[1-e -0.5928(t+0.1354)]3. Relationship between body length and body weight of P.fulvidraco was expressed as the formula: W7.986 1×10 -2L 2 4471. The rapidly growth of body accurs in the age of 1 to 2 years. Each fish can produce 1?345-7?208 eggs, relative productivity is 48-78 3 eggs per gram body weight. Relationship between fecundity and body length was indicated by the exponential equation: F115 497 7L 1 4539.更多还原