鮻作为清洁者在养殖系统中理论混养量的计算方法

Determing Theoretical Polycultural Quantity of Redeye Mullet (Liza haematocheila) as Scavenger in Aquaculture

通过量化计算鱼类鮻在养殖生态系统中鮻总氮清洁能力,利用数学叠代和逼近法构建量化鮻动态清洁能力的模型,精确计算鮻混养量理论值。运算结果表明:初始放养量为1 kg的鮻在水温21℃、90 d的养殖周期中清除有机颗粒氮469.60 g,自身作为养殖附加产品产出量为1542.01 g。

Redeye mullet （Liza haematocheila）, a detritivorous fish, acts as a scavenger and changes material cycle process in an aquaculture ecosystem. Relationship among weight, temperature and scavenging nitrogen, together with relationships between weight, temperature and each component in the nitrogen budget, were described under renewed calculating method. Based on approximation and iterative method, a dynamic calculating model was established. The optimal polycultural quantity of mullet is determined with the following result： under 21 ℃ and a 90-day culture period, mullet weighted 1 000 g can consume 469.60 g N, and reach 1 542.01 g themselves as by-product.