In the breeding process of salmon, there are occasions where the loss of appetite or no feeding is observed. The reasons are mainly the following two.
First, the water quality deteriorates without changing the water in the long term
Carp farmers often use conventional methods of fish farming to determine the quality of water, and believe that water quality is good and the water quality is good. There is no timely change of water. In fact, in the process of carp aquaculture, due to the large amount of feed fish predated by carp, its excrement is very serious (especially at the bottom of the water body), but the water is very clear from the surface. After the water pollution, the squid tends to return (feeding the fish after feeding), loss of appetite or even ingestion.
Measures to be taken: In the premise of eliminating fish breeding disease and water body injury, water should be changed in time. Change the water method: First drain the bottom of the pond to 1/2-2/3, then inject new water. After feeding the feed fish, water body disinfectants (such as chlorine dioxide, strong chlorine extract, bromochlorohydantoin, dibromohydantoin, complexed iodine, etc.) are used to disinfect the water once, and the common carp can restore appetite. If squid appetite diminishes again after 2-3 days, change the water again. After changing the water, the whole pool of calcined pulp shall be sprayed evenly to improve the water quality. The amount of quicklime per acre is 5 kg. Biological agents can also be used to purify water quality, such as the application of photosynthetic bacteria, compound live bacteria biological water purifiers, etc. It is also possible to plant aquatic plants at the bottom of the pond to purify water quality.
Second, multiple, blind and excessive medication caused by drug injury
In order to increase the survival rate of squid, some farmers often use drugs, blindly use drugs, and overdosage drugs, which often cause phytotoxicity. The performance of the fish was cumulative poisoning, increased resistance to parasites, and contamination of the body with drugs, resulting in loss of appetite or no feeding.
Remedy: To prevent salmon disease, it is necessary to prescribe the right medicine and medication according to the standard. At the same time, it is necessary to take precautions as the main factor and to rule as the supplement. In addition to the onset of salmon and water, most fishes are related to feed fish. For example, parasites and bleeding diseases of feed fish can infect trout. Therefore, self-cultivation of feed fish and inspection before putting it into the trout ponds can reduce the use of medicines for the trout ponds.
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