Swim bladder disease
There are signs that the fish cannot control their position in the water, sometimes they can only do their best to rise from the bottom of the water, sometimes they can't get out of the water, or even upside down on the surface.
If the disease is not caused by the disease in the affected fish, the problem may be due to the dysfunction of the swim bladder. Such problems are usually limited to deep-bodied fish, especially cyprinid fish. Scaleless fish seem to be particularly vulnerable.
The recommended treatment has no effective treatment for this condition. Since the disease is caused by cold water, a slight increase in temperature combined with a moderate saline solution can often relieve the disease. Feeding water fleas or worms to improve digestion is helpful for treatment.
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Do bighead carp eat phytoplankton?
Bighead carp mainly feed on zooplankton, but also feed on phytoplankton. According to Professor Ni Dashu's research, the average ratio of zooplankton to phytoplankton in bighead carp food is 1: 4.5. Phytoplankton is dominant in quantity, but its biomass is far less than that of zooplankton. On average, one zooplankton is 10 times or more larger than one phytoplankton. Therefore, from the bighead carp feeding habits analysis, phytoplankton occurrence rate is not low, but the main role in nutrition is still zooplankton. According to this situation, the original Guangdong experience still has room for improvement, namely bighead carp and silver carp.
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Rules for the use of fishery drugs
The use of fishery medicine should be based on the basic principle of not endangering human health and not damaging the ecological environment of the water area, and should be used as much as possible; strictly abide by the regulations of the relevant state departments, the production, sale and use of fishery drugs without production license, approval number and production implementation standard are strictly prohibited. When the disease occurs, drugs should be used for symptoms to prevent the abuse of fishery drugs, blindly increasing the dosage or increasing the frequency of drug use or prolonging the time of drug use. drugs or additives prohibited by the state shall not be used in aquatic feed, nor shall they be used in feed.
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