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根据广东省惠阳县网箱养殖的生产统计数据 ,拟合了赤点石斑鱼的生产函数。该生产函数为不过原点的二次模型 ,其变量包括放养密度、养殖期、鱼种规格、养殖期以及成活率等。该模型的产量生产函数为 :Y =- 0 .0 0 0 4 59D2 +0 .930D - 0 .0 0 0 887D·FS- 0 .0 10 3D·CP+0 .686FS·S +5.4 4 8CP- 169.783,R2=0 .8970。据此求得最大经济效益的放养密度与养殖规格、养殖期及上市价格之间的关系公式为 :D =〔0 .930 - 0 .0 0 0 887FS- 0 .0 10 3CP-P苗/ (P鱼 -FC·P料)〕/ 0 .0 0 0 918。同时计算了在目前市场条件下不同养殖期和鱼种规格的组合时的最佳放养密度。
According to the production statistics of cage culture in Huiyang County of Guangdong Province, the production function of the red spot grouper was fitted. The production function is a quadratic model but the origin of the variables, including the stocking density, breeding period, species size, breeding period and survival rate. The production yield function of this model is: Y = - 0 .0 0 4 59D2 +0 .930D - 0 .0 0 0 887D · FS - 0 .0 10 3D · CP +0.668FS · S +5.4 4 8CP- 169.783, R2 = 0.8970. The relationship between the stocking density and the cultivation specifications, the breeding period and the listing price based on which the maximum economic benefit is obtained is as follows: D = [0 .930-0.0888FS-0 .0103CP-P shoot / ( P fish-FC · P material)] / 0. 0 0 918. At the same time, the optimal stocking density for different combinations of aquaculture and fingerling under the current market conditions was calculated.