论文部分内容阅读
青虾池塘养殖具有较高的经济效益,但捕捞难的问题影响了经济效益的进一步提高。我们在观察了解青虾的行为习性和对传统虾渔具捕捞性能分析的基础上,研制了池塘虾拉网,经过试验性应用证明:虾拉网具有起捕率高,捕大留小性能好,省劳力,能显著提高青虾养殖的经济效益。本文较详细地介绍了虾拉网的结构特点,渔法要点及其效益对比情况。青虾(学名日本沼虾)是我国主要的淡水经济虾类,其人工养殖业正在迅速发展,池塘青虾养殖面积不断扩大。但是,当前池塘青虾捕捞都是用传统的干塘方法,不但方法落后,劳动强度大,而且许多小虾
Freshwater prawn pond culture has a higher economic efficiency, but the problem of fishing difficult to affect the further improvement of economic efficiency. Based on the observation of the behavioral habits of freshwater shrimp and the analysis of the fishing performance of the traditional shrimp fishing gear, we have developed a pond shrimp prawn. The experimental application proves that the prawn net has the advantages of high capture rate, Provincial labor, can significantly improve the economic benefits of aquaculture. This paper introduces in more detail the structural characteristics of prawn nets, the points of fishing law and their benefits. Freshwater shrimp (Macrobrachium nipponense) is China’s major freshwater economic shrimp, its artificial breeding industry is rapidly developing, ponds shrimp farming area continues to expand. However, the current pond freshwater prawn fishing are using the traditional dry pond method, not only backward, labor-intensive, and many shrimp