CAJ | 학술논문

在江苏扬州地区池塘养殖条件下，虾苗平均初体重为2．01 g／尾，放养密度为6190尾／667 m2，经过130 d的养殖，平均体重达到52．91 g／尾。克氏原螯虾的体重增长呈典型“S型”曲线，符合Boltzmann模型，根据养殖时间和虾体重拟合其生长方程为：W＝（－1．80－52．91）／[1＋e（t－40．48）／14．90]＋52．91，其生长拐点为在养殖40．48 d时，体重为25．56 g，养殖60 d时，体重可达40 g／尾以上。大规格克氏原螯虾生态养殖的成本投入为1652元／667 m2，产量可达96 kg／667 m2，净效益达3303元／667 m2。适当降低克氏原螯虾苗种放养密度，提高养成规格，可以降低成本投入和养殖风险，大规格成虾生态养殖是未来克氏原螯虾规模化养殖发展的必然趋势。
재강소양주지구지당양식조건하，하묘평균초체중위2．01 g／미，방양밀도위6190미／667 m2，경과130 d적양식，평균체중체도52．91 g／미。극씨원오하적체중증장정전형“S형”곡선，부합Boltzmann모형，근거양식시간화하체중의합기생장방정위：W＝（－1．80－52．91）／[1＋e（t－40．48）／14．90]＋52．91，기생장괴점위재양식40．48 d시，체중위25．56 g，양식60 d시，체중가체40 g／미이상。대규격극씨원오하생태양식적성본투입위1652원／667 m2，산량가체96 kg／667 m2，정효익체3303원／667 m2。괄당강저극씨원오하묘충방양밀도，제고양성규격，가이강저성본투입화양식풍험，대규격성하생태양식시미래극씨원오하규모화양식발전적필연추세。
Under the pond conditions of Yangzhou area , the crayfishes ( Procambarus clarkii) with an average body weight of 2.01 g were reared at the stocking density of 6190 crayfish/667 m2.After 130 days’ rearing, their average body weight reached 52.91 g.The body weight gain of crayfishes presented a typical S -type curve, and conformed to Boltzmann model .The simulated growth equation describing the relationship between crayfish body weight ( W ) and rearing time ( t ) was built as follows: W =( -1.80-52.91)/[1+e(t-40.48)/14.90]+52.91.The growth inflection point of crayfish was (40.48 d, 25.56 g).On the 60th day after being reared , the body weight of crayfish could reach above 40 g.In the ecological rearing of large -size crayfishes , the input cost was 1652 yuan/667 m2 , the yield could reach 96 kg/667 m2 , and the net benefit reached 3303 yuan/667 m2 .Properly reduc-ing the stocking density of crayfishes to enhance the size of the harvested crayfishes could decrease the input cost and rearing risk . The ecological breeding of large -size Procambarus clarkii is an inevitable trend for the development of its large -scale artificial breeding in the future .