奥尼罗非鱼养殖池沉积形成及其主要影响因子的初步研究

在半封闭式奥尼罗非鱼养殖池中投入饲料,探索养殖过程中鱼池沉积形成及其主要影响因子。试验结果表明:无论养鱼或未养鱼,投饲或不投饲,各池均发生不同程度的沉积;外源饲料输入量相同时,养鱼池新颗粒物生成量(干重)比未养鱼池大15.63%,而沉积量比未养鱼池小19.49%;无外源饲料输入时,养鱼池的沉积量比未养鱼池大75.76%;养殖系统内养殖对象与其所处环境的相互依存和相互制约对系统新颗粒物生成及沉积具有重要作用。

The Preliminary Study on Sedimentation and Impact Factors in Tilapia Fingerling Culture Ponds

Feed was fed in a semi-closed tilapia fingerlings rearing pond to explore the sediment formation and impact factors. The results showed that there were different natural sedimentation in the rearing ponds, with or without fish, either fed or not. Compared with the non-stocking ponds, the quantity (dry weight) of new particle formation and the sediment formation in rearing pond was 15.63% higher and 19.49% lower in the ponds with fish when same quantity feed was introduced. In the unfed condition, however, sediment formation was 75.76% higher in the rearing pond with fish than that in the rearing pond without fish. It was found that the interaction between the fish and its environment plays an important role in a new particle and sediment formation in a culture system.