目前,我国水产市场已告别短缺经济,养殖业由产量速度型向质量效益型转化,水产品市场已由卖方市场转向买方市场。据研究认为,提高水产养殖业效益还存在数种效益空间。一是品种效益养鱼户所养的品种不同,其效益则有明显的差异。例如,去年7～8月间,达到商品鱼规格的鲤鱼每公斤6元,可250克以上的鲫鱼每公斤价格却在8～10元左右,二者的生产成本差不多,而养殖鲫鱼就比养鲤鱼效益好。又如土塘虱每公斤价格20～25元,而埃及塘虱每公斤只6～7元,肉料比大致差不多(一般是饲料2～2.5公斤转化为1公斤鲜鱼),土塘虱亩产 At present, China’s aquatic market has bid farewell to the lack of economy, aquaculture from the rate of production-based quality and efficiency into the aquatic products market has been shifted from the seller to the buyer’s market. According to the research, there are several benefits for improving the efficiency of aquaculture. First, the benefits of breed cultivated fish farmers have different varieties, the benefits are obvious differences. For example, between July and August last year, the carp reaching the specifications of commodity fish can cost 6 yuan per kilogram, but the price of crucian carp that can consume more than 250 grams per kilogram can reach about 8 to 10 yuan per kilo. The production cost of both is about the same, Carp effective. Another example is the pond lice price of 20 to 25 yuan per kilogram, and Egyptian pond lice per kilogram of only 6 to 7 yuan, roughly the same flesh (generally 2 to 2.5 kg of feed into 1 kg of fresh fish), soil pond lice acres Production