Biology and breeding techniques of Snakehead Snakehead

Crude ash 1.10, crude protein 20.69, crude fat 0.76, compared with other precious freshwater fish: the crude protein content is higher than that of largemouth catfish (14.85), and the crude fat is lower than that of largemouth catfish 1.32, Cystine 0.13, Valine 1.00, Methionine 0.43, Isoleucine 0.92, Leucine
1.1 Morphological Characteristics
1.2Growth

Pond cultured white mullet can reach sexual maturity in two years, and its gonadal development cycle is 2～3. Most eggs are in the Ⅳ stage, and 3～4 months.
Choose pond conditions with good water sources. The appropriate pond size is 60~100 square meters. The height of the pond is 1.5 meters, and the water level is White mullet is a carnivorous fish. The parent fish are generally fed with small miscellaneous fish in the pond and some low-quality fry. They can also be fed with terrestrial earthworms, water earthworms, loaches, etc. The feeding rate is generally 3~22～23℃, it is 26～36 hours; 24～50 cubic meters per hour. The water temperature is controlled to 22～27℃. The dissolved oxygen is controlled to be above 4mg/L. The newly hatched larvae are black in color and float on the water surface or lie sideways on the edge of aquatic plants or suspended objects. They cluster at the edges and corners of the pond and are quiet and not easy to move. At this stage, the respiratory organs on the gills of the fry are not yet fully developed, and their respiration depends entirely on dissolved oxygen in the water. Therefore, the water quality must be maintained well at this time. The key to high survival rate and fast growth of the fry lies in sufficient dissolved oxygen and abundant palatable bait in the water. Cultivation pond25～60 square meters, water depth 0.5～0.8 meters, press 25～30 days of cultivation, the size of the fish can reach 8～13 centimeters. ②Reasonable stocking density and choose palatable bait;

①Cultivation conditions: Both earthen ponds and stone ponds can be cultured, and the water depth is 1.5～100~150kg of quicklime slurry water is poured per acre, so that no dead ends are left. After disinfection, the water should be fed 1 week, and the water can be stocked 10 or so days later. ② Breeding technology: stocking specifications The stocking density is 2～3 tails per square meter, that is, about 1500～2000 tails per mu. The feeding amount is 6~10% of the fish's weight. As the fish's weight increases, it gradually decreases to about 6%. When feeding, you can see lively scenes of swarms competing for food, and some jumping out of the water. Under certain breeding conditions of white mullet, 16～20 cm fingerlings were released. After 5 months of growth, the survival rateWhite mullet is in the main growth period in 7～10, especially 9 is the best month, 7～White mullet is a ferocious carnivorous fish. It must go through the domestication process of food conversion to achieve the purpose of using compound bait to breed adult fish. At present, in my country, it is difficult to use ultrafine feed for food conversion, that is, the opening of the bait has not yet been solved.We start to switch to powdery and small pellet feed when the size of the seedlings reaches about 13 centimeters, and then switch to mixed bait within 18～20 days, 94～91.8% of the compound feed within 15~20 days. Crude fiber1.23～2.83; ash content11.3～12.4, moisture 8.01～Enhance the disease resistance of fish, select fish species with strong physiques and neat specifications, raise them reasonably densely, separate them at the right time, strengthen management, and achieve the four certainties. 6.1 Small melonworm
6.2 Trichobiosis
6.3 Saprolegnia
Sprinkle formalin 20～30ppm or potassium permanganate 30～50ppm throughout the pool. You can also use 3～It is common in the adult stage. The fin base and mandible of the diseased fish are red, the eyes are protruding, the scales are loose, and the muscles are swollen. There is no effective treatment for this disease.