Matters needing attention for releasing fish species in early spring
1. Fish seed quality
Putting in the fish requires the same age, the same specification, no injury, complete scale fins, strong traceability, and the Gill cover is not dilated after leaving the water.
two。 Fish seed disinfection
Fish seed disinfection should be paid attention to: ① drugs should be used now, dispensing should use clear water, avoid using fat water, and avoid direct sunlight when medicine is washed. The dose of ② should be accurate to avoid underdose or overdose. ③ soaking time should be appropriate. When fish species are found to be poisoned, water should be added immediately or the fish species should be transferred to another clear water container.
3. Stocking time
Before the fish goes into the pond, the cleaning and disinfection of the pond should be done strictly, and the fish can not be released until the medicine has completely disappeared. The best time for fish stocking is at noon on a continuous sunny day, and when entering the pond, it should be noted that the temperature difference between the water temperature of the fish fry container and that of the pond is less than 3 ℃. Generally speaking, fish species can be transported with oxygen in plastic bags. When going down to the pond, it is necessary to go through "slow seedling" treatment and count accurately.
4. Mixed culture type
Generally, five or six kinds of fish can be mixed in adult ponds, of which one or two kinds of fish are mainly called @ # @ 233 carp. For example, ponds dominated by grass carp are usually equipped with carp and carp; ponds dominated by herring are usually equipped with carp; except for ponds dominated by silver carp and bighead carp, other types of ponds can generally be mixed with silver carp and bighead carp. Silver carp and bighead carp are necessary in mixed ponds.
5. Mixed culture ratio
The "80 ∶ 20" model is now widely used in various places, in which 80 per cent consists of a popular "high-value fish" that eats pellet bait, while the remaining 20 per cent consists of "service" fish, such as filter-feeding fish (conducive to water purification) and carnivorous fish (conducive to the control of wild miscellaneous fish).
- Prev
Viral disease: hemorrhagic open mouth disease of eel
[pathogen] the pathogen of hemorrhagic open mouth disease of eel is a kind of deoxyribonucleic acid virus. [symptoms and pathological changes] the diseased eel showed severe bleeding, mainly in the cranial cavity, followed by oral and head muscle bleeding. Diseased fish osteoporosis, prone to bone fragmentation, cranial cavity appears "open skylight"; the joint between tooth bone and joint bone is loose, the mouth is often open, can not be closed. Liver, spleen, kidney enlargement, extreme anemia. The blood of diseased eel was observed by ultra-thin section, and virus particles could be seen in blood cells. [epidemic situation] Anguilla Anguilla
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Smoking and roasting of fish
1. to smoke fish. The raw materials of smoked fish are mostly herring, grass carp and other medium-sized fish, but also common carp, silver carp, Pomfret and other fish. It is processed into delicious convenience food. The manufacturing method is as follows: ① cutting. After selecting the fish, wash it with clean water, scrape off the fish scales, cut off the fins, cut open the abdomen, and remove the internal organs. But do not dig the gallbladder, so as not to cause meat bitterness, then use hot water to rinse the cloth, wipe off the blood stains and black membranes in the abdominal cavity, and then cut open the fish head to make the fish body into a sheet. For larger herring, after the head is removed,
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