Remediation and management of fishery production after disaster

Recently, in some areas of our province, many breeding ponds have escaped fish due to heavy rains for several days, bringing great losses to farmers. The remediation and management of fishery production after disaster has become an important work for aquaculture households. The author puts forward the following measures for reference of aquaculture households according to his experience in fishery work for many years.

I. Remediation of post-disaster fisheries production

1. Fish pond purse seine. When the flood recedes, fence around the fish pond in due time to prevent the fish in the pond from continuing to escape and reduce losses.

2. Restock seedlings. For ponds with heavy escaped fish, seedlings should be replenished in due time, mainly summer flower fish species and green shrimp seedlings, and 300~500 summer flower fish species or about 2000 green shrimp seedlings with 1~2 cm specifications should be put into each mu.

II. Post-disaster fish pond management

1. Lower the water level and disinfect the pool thoroughly. After flooding, the pond water level should be kept moderate, generally 1.5~2 meters. Disinfect the pool water with disinfectant in time to prevent the occurrence of infectious diseases. It is better to disinfect the water with quicklime. Sprinkle the whole pool with quicklime 13kg per mu of water surface at a depth of 1 meter.

2. Feed complete quality feed. Because there are few fish in the pond after the disaster, in order to obtain high and stable yield, it is necessary to feed complete and high quality fish feed in due time, especially in the pond supplemented with summer flower fish and shrimp fry. Under normal circumstances, if the supplement is silver crucian carp summer flower fish species, in the case of feeding high-quality feed, the end of the year can reach the market specifications.

3. Prevention and treatment of fish diseases. After the disaster, the fish ponds overflow each other, increasing the chances of fish disease infection, breeding ponds have hidden dangers of fish disease outbreak, strengthening fish disease prevention and control is the foundation of high and stable yield in the pond@#@233 @#@. 7, 8, 9 months, every 100 kg fish mixed with norfloxacin 1~3 g, feeding for 3 days, once a month; feeding bait at the same time, with pesticides to kill insects, after the third day with disinfectant disinfection once. If dead seedlings are found in the pond, please ask technicians for diagnosis and treatment in time to reduce losses.

4. EM bacteria are introduced. EM bacteria can increase the number of beneficial bacteria in water, inhibit the reproduction of harmful bacteria, and thus reduce the incidence of pond fish.