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Rainbow trout is named after its adult body has a rainbow-like brown-red vertical pattern along the lateral line. Rainbow trout has the advantages of delicious meat, rich nutrition, less thorn meat, high food value, rapid growth, and easy artificial breeding. At present, it has become one of the four large-scale freshwater aquaculture species with high yield and excellent quality promoted by the United Nations Food and Agriculture Organization of the United Nations. It is classified as a high-grade fish. The water temperature of rainbow trout is 2 to 25°C, and the optimum water temperature is 12 to 20°C. Its adaptability is very wide. It can be cultivated in ponds, but it can also be stocked in reservoirs, lakes and rivers, especially in running water. It can be grown all year round with high yields. Large-scale flow aquaculture practices have proved that in general mu Produced fish 30,000 to 35000 kg, up to more than 50,000kg. Therefore, the rainbow trout fish water breeding prospects are attractive.
Artificial Breeding and Flow Culture of Rainbow Trout
Rainbow trout, commonly known as trout, is a genus of the genus Oviformus, which is native to the Pacific coast streams of North America and belongs to the bottom cold-water fish. Rainbow trout males are sexually mature earlier than females. Rainbow trout males Sexual maturity is generally 2 to 4 years, female sexual maturity in 3 to 5 years, usually mature males are 2nd age, females are mostly older. Rainbow trout hatchery has stricter requirements for rainbow trout fish hatching should be avoided Intense light stimulation and interference from the external environment, so fertilized egg hatching should be carried out indoors as much as possible, the hatchery room area can be determined according to the amount of production of seedlings. Cultivation of millions of juvenile juvenile fish, hatching room can be about 200 m2. In addition, the breeding chamber should be close to the water source, and the water quality must be clean and free of pollution. The bottom of the pool should be higher than the ground to facilitate the discharge of water and dirt. Prolonging the light time per day can promote the early spawning period, but should not exceed 12 h. In a water body with an average high water temperature, the gonads of rainbow trout cannot mature on time. Not only abnormal eggs but also the oviparous rate of eggs are significantly reduced. The range of water temperature for fertilized eggs hatching is 6 to 13°C, and the optimum water temperature is 8 ~ 10 °C. At a water temperature of 10 °C, the incubation period is about 30d.