Matters needing attention in domestication of wild Qikou split belly fish

Qikou split belly fish, which belongs to Cyprinidae, subfamily Cyprininae, Genus fish, alias elegant fish, fine scale fish, carp. With the increase of market demand for Qikou split belly fish, its natural resources are in short supply. in order to meet the market demand, running water ponds and cage culture have been carried out in some areas of Sichuan and Chongqing. The culture of cleft-bellied fish has developed rapidly in recent years, and most of its parent fish come from wild populations in natural waters. In order to protect and develop high-quality wild fish resources scientifically and reasonably, the Chuanshan Zhe Salmon Conservation Center of the Marco River carried out an experimental study on the domestication and culture of Qikou cleft belly fish from March 2006 to October 2007. The matters needing attention for domestication of wild fish are introduced as follows:

I. selection of wild parent fish

The parent fish come from the Marke River in the upper reaches of the Dadu River and are caught or caught by single-layer or three-layer Gill nets. Choose high-quality, strong, less injured fish as domestication objects.

Second, domestication sites

Ponds or running ponds can, the area should not be too large, easy to manage. In the initial stage of domestication, sunshade facilities should be provided on the pond to avoid direct sunlight and human activities near the pond, so as to keep the parent fish quiet as much as possible so that they can adapt to the new environment as soon as possible. At the same time, birds should be prevented and the phenomenon of birds preying on fish in the pond is found in the process of domestication.

Before injecting water, clean the pool thoroughly and let the sun shine. A few days before the parent fish is injected into the pond, some algae will be planted on the pond wall. If the cement pond is properly laid with pebbles, the wild parent fish will not scratch the fish in the process of adapting to the new environment.

Third, collocation and domestication

In order to speed up the domestication of wild Qikou split belly fish, the fish with similar feeding habits were domesticated. In the process of domestication, Dadu naked split rump fish was released. Compared with Qi mouth split rump fish, Dadu naked split rump fish is easy to domesticate, strong ability to adapt to the new environment, strong foraging ability, put into the pond, and take the initiative to look for food on the fixed bait table after 3-5 days. With the feeding of batches of naked split rump fish, the speed of domestication is accelerated.

The bait table is sewn with sieve silk, 50 cm in diameter and round in diameter. After loading the feed, it is located at 10 cm to 20 cm from the bottom of the pool. The bait is fed with carp.

IV. Strengthen daily management

Qikou split belly fish like countercurrent, good at jumping, set up a sewage grid at the water injection or intake to prevent parent fish from jumping out against the current, while blocking weeds, branches, fallen leaves and so on. The drain is provided with an anti-escape net. Clear out the leaves, residual bait and dead fish in the pond in time.

Wash the bait table irregularly, wash it and expose it to the sun for re-use.

V. Disease prevention and treatment

In the process of domestication, the high incidence period of death is 3 to 10 days after entering the pool, and the main disease is water mildew. It is caused by water mold infection due to injuries on the body surface, scales falling off or jumping against the current in the process of fishing and transportation.

Before the parent fish entered the pond, the mixture of sodium chloride and sodium bicarbonate 1 ∶ 1 was used, the concentration was 8 mg / L, and the bath was for 2 hours. For body surface injuries, wipe dry and apply erythromycin ointment, or mix dissolved methylene blue with Vaseline and apply to the wound.

After entering the pool, the whole pool was sprinkled with methylene blue every two days, the concentration was 2mg / L, sprinkled 3 times.