应用生产函数确定网箱养殖赤点石斑鱼最佳放养密度  

Optimum stocking densities of red spotted grouper Epinephelus akaara in net cages: determination by production function

作　　者：艾红[1] 巫特坚 李永振[1] 陈丕茂[1] 林金錶[1] 

机构地区：[1]中国水产科学研究院南海水产研究所,广东广州510300 [2]广东省水产养殖技术推广总站惠阳分站,广东惠阳516081

出　　处：《中国水产科学》2000年第4期42-46,共5页Journal of Fishery Sciences of China

基　　金：中国水产科学研究院青年科学基金资助项目! (97 0 1 0 2 )

摘　　要：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。A production function for red spotted grouper was estimated using marine net cage culture data collected in Huiyang County of Guangdong Province. The function is a quadratic model not through the origin,its explanatory variables including stocking density (D) and its square, cultured months(C P), and 3 cross products which are stocking density×fingerling size (F S), stocking density×culture period (C P), and fingerling size×survival rate (S). The production function equation is Y=-0.000 459 D 2+0.930 D-0.000 887 D·F S- 0.010 3 D·C P+0.686 F S·S+5.448 C P-169.783,R 2=0.897 0. The relationship between maximum profited stocking densities and fingerling size, cultured months, feed coefficient (F C), market prices of fingerling (P f), adult (P a) and feed (P fd ) were examined according to the equation which is D=〔0.930-0.000 887 F S- 0.010 3 C P-P f/(P a-F C·P fd )〕/0.000 918. The maximum profited stocking density were also calculated according to the combinations of various culture period and fingerling size under present conditions.

关 键 词：赤点石斑鱼 放养密度 网箱养殖 生产函数 

分 类 号：S965.334[农业科学—水产养殖] S964.7[农业科学—水产科学]