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鳜鱼的摄食习性相当奇特 ,自鱼苗开食起 ,终生以活鱼虾为食 ,一般拒食人工饲料 ,这种现象在鱼类中十分罕见。目前 ,人工繁殖所孵出的鳜苗一般采用家鱼苗种作活饵 ,不仅饲料成本高 ,而且制约了养鳜业的发展〔1〕。据调查 ,1 995年全国的养鳜产值在 2 0亿元以上 ,但仅饲料成本一?
Nautilus feeding habits quite strange, starting from the fish fry, life to live fish for food, the general antifeedant artificial diet, this phenomenon is very rare in fish. At present, the artificial breeding hatched seedlings generally use the domestic fish seed as live bait, not only high feed costs, but also restricts the development of breeding industry [1]. According to the survey, since 1995, the output value of raising livestock in the country was above 2 billion yuan, but only the cost of feed one?