孟家段水库鲢、鳙鱼生长规律的研究

Study on Growth Pattern of Silver Carp and Bighead Carp in Mengjiaduan Reservoir

孟家段水库的主要养殖鱼类鲢鱼和鳙鱼的体长 (L)和体重 (W)的关系分别为WH=0 0 35 2L2 862 0H 和WA=0 0 794L2 6912A ,该库的鲢鱼体长和体重的VonBertalanffy方程分别为 :LH=75 5 76 5〔1-e-0 154 4(t+ 0 3 982 ) 〕 ,WH=8482 15〔1-e-0 154 4(t+ 0 3 982 ) 〕2 862 0 ;鳙鱼体长和体重的VonBertalanffy方程分别为 :LA=80 96 10〔1-e-0 1611(t+ 0 7794 ) 〕 ,WA=10 848 5 8〔1-e-0 1611(t+ 0 7794 ) 〕2 6912 .并根据此方程计算出其生长速度和生长加速度的方程 .该库鲢、鳙的生长参数为 :L∞ (H) =75 5 76 5cm ,W∞ (H) =8482 15g ,L∞ (A) =80 96 10cm ,W∞ (A) =10848 5 8g ,KH=- 0 15 44 ,KA=- 0 16 11;t0 (H) =0 3982 ,t0 (A) =0 7794;生长拐点分别为 2 478 14g(0 2 92W∞ (H) )和 310 7 6 0g(0 2 86W∞ (A) ) .比较几个不同纬度水体同种鱼类的vovBertalanffy方程的系数可知其生长速度较为缓慢 .

The growth regularity of silver carp(Hypophthalmichthys molitrix)and bighead carp(aristichthys nobilis)in Mengjiaduan reservoir was reported in this paper.The interrelative formula between the body length(L) and weight(W) of silver carp and bighead carp are W H=0.035 2L 2.862 0 H和W A=0.079 4L 2.691 2 A respectively.Their von Bertatanffy growth formula are L H=75.576 5〔1-e -0.154 4(t+0.398 2)〕,W H=8 482.15〔1-e -0.154 4(t+0.398 2)〕 2.862 0,L A=80.961 0 〔1-e -0.161 1(t+0.779 4)〕 and W (A)=10 848.58 〔1-e 0.161 1(t+0.779 4)〕 2.691 2 respectively.Using von Bertatanffy growth formula to calculate growth parameter,the result is L ∞(H)=75.576 5 cm,W ∞(H)=8 482.15 g,L ∞(A)=80.961 0 cm,W ∞(A)=10 848.58 g,K H=-0.154 4,K A=-0.161 1;t 0(H)=0.398 2,t 0(A)=0.779 4.The weight at growth inflection point is respectively 6.41(2 478,14 g or 0.292 W ∞(H)) and 5.37(3 107.60 g or 0.286 W ∞(A)).The highest growth target is from one to six and five ages.