Matters needing attention in the Spring Festival Transport of Fish Seeds

Spring returns to the earth, the water temperature rises gradually, and it is the best time for the transportation of aquatic seedlings in a year. During this period of time, due to the low water temperature, fish activity ability is weak, at the same time, fish body is firm, scales are tight, and it is not easy to be injured during transportation, which can improve the survival rate of spring release of fish species. There are many precautions in the spring release of fish species, reminding the majority of fishermen friends to pay attention.

1. Pond disinfection should be carried out after removing excessive silt in the pond, reinforcing the pond ridge and dredging the drainage channel. Generally, the dry pond should be sprayed with quicklime 200kg/mu or more than 10kg/mu of bleaching powder to kill pests and diseases in the pond. Fertilized water shall be disinfected 5 ~7 days after pond disinfection, new water shall be added (dense nets shall be set at inlet and outlet to prevent wild miscellaneous fish from entering), fermented livestock manure of 200kg/mu ~500kg/mu shall be applied as base fertilizer (base fertilizer may also be applied before new water is added to pond), and the fertilizer amount of newly dug pond or lean water pond shall be increased accordingly to breed basic bait organisms in pond water. Disinfect and fertilize the pond before planting@#@233@#@seeds.

2. The net pulling operation before the spring festival should be careful. In the process of pulling the net, it is necessary to avoid fish body injury. After pulling the net, it is necessary to ship quickly to avoid fish species from colliding with each other due to long-term detention in the net, artificially causing fish body injury, and the redundant fish species that are not shipped should be put back in time to make them recover as soon as possible. Fish species should not stay in the cage for a long time, which is easy to cause the surface mucus of the fish species to fall off and infect the bacteria.

3. Fish species should be transported quickly and cannot stay in transit for a long time. In case of traffic jam, turn around and detour in time to send the fish species to their destination in the shortest time.

4. Transport water should be fresh, dissolved oxygen content should be high, and the water temperature is low and non-toxic. Generally, river water is the best, pool water and reservoir water are also available. Tap water has a high chloride ion content and is unusable. Well water contains many heavy metal ions and low dissolved oxygen, which is unusable.

5. During transportation, the suitable temperature range for fish species is generally 1℃~20℃, and the lower the temperature, the better. The lower the temperature, the slower the fish metabolism and the higher the transportation survival rate. When loading fish and fingerlings into the pond, pay attention to the temperature difference of water temperature, generally not exceeding ±4℃.

6。Fish species must be strictly soaked and disinfected before stocking to kill bacteria and parasites on the fish body surface and avoid bringing diseases and insect pests to the breeding pond. The method comprises the following steps of: putting the fingerlings into a basin or a barrel container containing medicine for soaking, wherein the general water temperature is 10 DEG C to 20 DEG C, the dosage of bleaching essence is 10g/cubic meter of water, and the soaking time is 10 minutes to 20 minutes; or the concentration of salt solution is 2% to 4%, and the washing time is 5 minutes. Fish soaking disinfection, special attention should be paid to the tolerance of fish species, but a more serious floating head should immediately fish out fish species, as soon as possible into the pond.