A heterogeneous method for three-level hybridization and three-level optimization of loach fish species

Abstract

The invention discloses a hybrid optimization method of three-level hybrid three-level optimization loach fingerlings. Related materials in steps comprise: A, tropic stock loach of two-year-old pond smelt of 50 Jin; B, cold zone stock loach of two-year-old female fish of 100 Jin; C, (1) sulfuretted hydrogen, (2) nitrite, (3) ammonia nitrogen, and (4) blue-green algae, and D, (1) fish chorionic gonadotrophin, and (2) domperidone injection liquid. The hybrid optimization method is a method of survival of the fittest and includes four steps. The hybrid optimization method of the three-level hybrid three-level optimization loach fingerlings can culture good stocks. Moreover, the stocks has strong vitality, disease-resistant capacity and anti-pollution capacity, diseases are few, medicine feeding is not needed during culture production, growth is fast, culture is easy, acre yield is high, male bodies and female bodies are uniform in size and good in quality, and the hybrid optimization method is suitable for an ecotype pollution-free high density culture model, can save culture sites, and is suitable for culturing the good stocks of export for earning foreign exchange.

Description

technical field [0001] The invention relates to a heterogeneous method for loach fish, in particular to a heterogeneous method for three-level hybridization and three-level optimized loach species. Background technique [0002] At present, the essential nutrition of loach fish is relatively prominent. Its nutritional ingredients have been scientifically analyzed. It has the nutritional ingredients of famous turtles, soft-shelled turtles and river eels. have. The pursuit of the unique nutritional ingredients of loach is the main reason why modern people continue to increase their demand. Therefore, the market demand at home and abroad is increasing every year. The market has been in an unsaturated state for 10 consecutive years. It is expected that the market will continue to grow in 10 years. Still in short supply. [0003] The applicant believes that loach farming is a good project that benefits the country and the people. It can be cultured in most areas of our country. ...

AI Technical Summary

Problems solved by technology

[0005] When wild loach seedlings grow naturally to 150-200 tails / kg in the wild, their intestinal digestive system, nervous taste system, and visual system all have instincts for wild food and environment. If the wild loach seedlings are intensively cultivated , it takes a long time to adapt to the water environment and feed in the breeding pond, and it will lead to malnutrition, weakness and secondary disability and death, resulting in low survival, prolonging the breeding period and other adverse consequences, and even missing the best breeding season of the year. opportunity

[0006] Wild loach fry: The amount of seedlings per mu is calculated according to the yield of 8000 catties per mu (30 fish per catty), and 70% of them are stored in ponds to survive; According to the common price of 30 yuan per catty, the cost of seedlings per mu is about 40,000 yuan; because the birth date of wild loach seedlings is not uniform, the time of collecting and purchasing seedlings is not uniform, and the time of throwing seedlings is also not uniform , resulting in lower survival, higher investment in seedling prices, and longer breeding time. Therefore, the risk of breeding for investors increases accordingly

[0007] Common loach seedlings artificially propagated: suitable for high-density breeding mode, but the disadvantages are: due to inbreeding, degeneration and other reasons, the individual differences between male and female are relatively large, the breeding of diseases is difficult, and the probability of successful breeding is low; Uniform and poor quality, resulting in a small market share of finished loach in foreign countries