1 品种效益　从事养殖的品种不同,其经济效益则有明显的差异。如鲤鱼市价有时高有时低,平均每千克7-8元:鲫鱼市价相对较稳,一般每千克10-2元,二者相比,虽然生产成本差不多,但养殖鲫鱼就比养殖鲤鱼效益好。又如,土鲶每千克价格在20元左右,革胡子鲶每千克却只有8-10元。虽然二者养殖方式和肉料比大体相同,但两者效益却大不相同,可见品种与效益有着十分密切的关系。 A variety of benefits Breeding in the different varieties, the economic benefits are significantly different. Such as carp sometimes high sometimes low, an average of 7-8 yuan per kilogram: crucian carp market is relatively stable, generally 10-2 yuan per kilogram, compared to the two, although the cost of production is similar, but farmed carp better than farming. In another example, the price of soil catfish per kilogram 20 yuan, leather catfish per kilogram but only 8-10 yuan. Although the two farming methods and meat than the same, but the two are very different benefits, we can see the varieties and benefits have a very close relationship.