Jiang Huanghuai, also known as Varsity Stingray, is a genus of maggots, genus (also known as ?), and genus of yellow mullet. There are yellow catfish, yellow river catfish, glossy yellow catfish and yellow catfish. It is not only environmentally friendly, low-temperature resistant, low-oxygen-resistant, and resistant to disease, but also has a complex diet. It also has delicate meat, delicious taste, rich nutrition, and high economic value.
The process of raising seedlings of 2.5 cm to 3.0 cm in size from yolk seedlings is the key to the success or failure of the breeding and succession of adult fishes. At present, the survival rate of giant yellow trout fry fry in Datang is low, usually only about 50%.
The Guangxi Kejia Aquatic Products Testing Laboratory cooperated with the Guangxi Nanning Aquatic Finesse Farm to conduct trials on the production of the Jianghuangjing Breeding. The successful use of small water bodies, high-density, and artificially fed bait-feeding plants to produce yellow seabream fry was successful. Now Jianghuang The planting seedlings of squid are introduced as follows.
Nursery conditions and methods
Nursery pond condition Seedling nursery pool The original shrimp seedling nursery pond is a cement pond 5 meters long, 1 meter wide, and 1 meter deep. It has a shading canopy, equipped with 2 inflators, and each cement pool has independent inlet and outlet drains. , gas supply pipe interface.
Qingchi disinfection of cement pool tank pool wall first wash with clean water, and then soaked with potassium permanganate disinfection, repeated washing with water injection, the water depth of 40 cm to 50 cm, with the fry grow gradually increased to 80 cm.
The river is screened and filtered through 100 mesh, tap water is exposed to aeration for more than 24 hours before it enters the seedlings.
The preparation of bait for yellow bait fish seedlings according to the bait preparation stage is based on the growth stages, such as abundance insects, water dippers, zero shrimp materials, puffed yellow catfish special float materials or pond angle fish materials. Filtration, disinfection, decontamination.
Fry (larvae) After larvae have been released from the larvae for about 65 hours, the yolk sac disappears, and the body color gradually turns dark brown, and it is gathered from the bottom of the pool and becomes adsorbed on the edge of the surrounding pool walls. Fry cultivation ponds. Jiang Huanghuai has no scales. The juvenile skin is thin and delicate, and it is very easy to injure the fry with careless operation.
Optional 80 mesh or more, soft texture of nylon dip net, when operating copy the net edge close to the wall, from the bottom up, slowly put the fry into the nylon dip net. This stage can put 50,000 fry per pool.
After the bait was fed, the yellow squid larvae had a total length of about 7 mm after 4 days of hatching, and their body color became dark brown. At this point the larvae began to feed and can feed Artemia. The Fengnian insects were filtered with a 120-mesh sieve, rinsed and then fed. Each day was fed at 9:00, 17:00, and 22:00. The three feedings were 30%, 40%, and 30%, respectively, and they were sprinkled along the edge of the pool as they were fed to ensure that each fry could feed. Until this time, the adequacy of bait in this stage directly affects the survival rate of nursery and the constitution of fish fry.
Iron Fortifier,Manganese Sulfate,Food Grade Manganese Sulfate,Manganese Sulfate Monohydrate
LIANYUNGANGLONGTAIWEI FOOD INGREDIENTS CO.,LTD. , https://www.longtaiweifood.com