Breeding of Yellow Sable Fish
1, fry cultivation
When the larvae hatch 4 to 5 days after they start feeding, this is the best time for the pond. The opening bait of fish fry is mainly composed of small clarinet type and rotifer, so it should be ensured that the fry can be fed with medium and large size as the fry grows after the water, crab, green frog and green frog. Branches and copepods; after 12 days of age, they can be fed with benthic larvae, leeches, oligarchs, etc., or ground fish paste; after 15 days of age, they can be fed with broken pellet feed. All can successfully transfer food and grow well.
The open bait of the fish of the river eel was transferred from feeding zooplankton to water-feeding benthic animals (chicken larvae, leeches, etc.) after the watershed was changed. This stage is a critical moment that affects the survival rate of the fry. In the past, during the cultivation of yellow sea trout fry, applying the technique of domestic fish to ponds, it only focused on the cultivation of zooplankton, neglected the cultivation of benthic animals, and then directly fed artificial concentrates. Since there are few benthic animals in the pool, The serious lack of palatable food at the fish stage is the main reason for the low survival rate of summer flowers. Nowadays, the method of using green shrimp instead of benthic animals has been adopted in production. A cage of 1 square meter per 667 square meters has been set up in Fatang Pond and 1.0 kg of spawning shrimp has been kept in the box. (Observing shrimp must be captured on the same day. Shrimp, cages put water plants, fed once every two days, such as snail (fish) meat and other feed, and remove the residual bait, clean the cage, in order to keep the inside and outside the pool of water). After hatching the shrimp, remove the cage and the shrimp, and let the shrimp into the pool. Sprinkle the milk immediately for the shrimp to feed. Sprinkle 15~17kg of soymilk per acre, and splash 1 time each morning and afternoon.
Using the above-mentioned method of raising seedlings, after about 21 days, the fry can grow to about 3 cm and enter the breeding stage.
2. Fish breeding
Fish breeding ponds can use ordinary fish ponds, with an area of ​​667 to 2667 square meters, water depth of 1.2 to 1.5 meters, fresh water sources, and easy injection and drainage. 10 days before stocking, clear the pond thoroughly with quicklime according to the conventional method, apply base fertilizer, and the transparency is controlled at 25-50cm. When zooplankton, such as rotifers, cladoceras, and copepods, reproduce in large numbers in the pond, they can put 2~3cm in length into the pool. After 2 days in the pond, it is possible to feed artificial mash, fish slurry or granules in mid-April, and feed it 2 to 4 times a day. The amount fed is about 6% to 8% of the total weight of the fish. The yellow snapper fish species have a habit of cluster feeding and it is easy to tame. In the daily management, stick to the daily tour ponds, pay attention to observe and record the weather, water quality, food intake and growth of the fish, and do a good job of disinfection and other fish disease prevention and control work.
After 20 to 25 days, the fish species can grow to 5 to 6 cm. At this time, the adult fish can be fed into the pool.
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