现在,水产品产量大幅度提高,导致销售困难,价格下降,养鱼户的养殖经济效益普遍降低。如要提高养殖效益,建议积极调整品种结构,多养以下几类水产品。1.套养吃鱼的品种:在同一口池塘中,适当套养一些肉食性鱼类,如鳜、乌鳢(黑鱼)、加州鲈、鲇等。利用这些鱼类,既可以清除池塘里的经济价值 At present, the output of aquatic products has increased significantly, which has caused difficulties in sales and prices, and the economic efficiency of aquaculture farmers has generally declined. If it is necessary to improve the aquaculture efficiency, it is recommended to actively adjust the structure of the species and raise the following types of aquatic products. 1. Cultivating fish species: In the same mouth pond, some carnivorous fishes such as cockroaches, black squid (blackfish), California clams, quail, etc. are properly set. Use these fishes to clear the economic value of the pond