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Prevention and Control Methods and Technical Key Points for Bighead Carp Emaciation Disease

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1. Cause: Due to overstocking and insufficient feed, some fry or fingerlings cannot obtain enough feed, becoming emaciated and dying. 2. Symptoms: The diseased fish has a shrunken, thin, and emaciated body, a large head and small tail, a back resembling a knife blade, pale gill filaments, severe anemia, sluggish activity, and a darkened body color, dying shortly after. 3. Prevalence: This disease mostly occurs in the later stages of the fingerling rearing phase. It is caused by improper stocking density and mixing ratios and insufficient feeding in overwintering pond fingerlings and excessively densely stocked adult fish, especially in bighead carp.

1. Cause: Due to overstocking and insufficient feed, some fry or fingerlings cannot obtain enough feed, becoming emaciated and dying.

2. Symptoms: The diseased fish has a shrunken, thin, and emaciated body, a large head and small tail, a back resembling a knife blade, pale gill filaments, severe anemia, sluggish activity, and a darkened body color, dying shortly after.

3. Prevalence: This disease mostly occurs in the later stages of the fingerling rearing phase. It is caused by improper stocking density and mixing ratios and insufficient feeding in overwintering pond fingerlings and excessively densely stocked adult fish, especially in bighead carp.

4. Prevention and control methods: Strengthen feeding management and feeding work; feed well and to satiation before overwintering; master proper mixing ratios and stocking density.

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