To breed hybrids, we must first master the seed production techniques. Hybrids can be spawned either naturally or spawned manually. Any hybrid cricket production must use excellent purebred as the parent. The area of ​​the pro-fish pond is suitable for 1 to 3 mu, the water depth is 1.5 to 2.5 meters, and the mu stocking is 100 to 105 kg. A small amount of carp, carp, grass carp, carp, etc. can also be raised. Female and male fish should be cultured in separate ponds, or they should be first mixed and raised until one month before spawning. The water temperature can be propagated at 16°C to 18°C, and breeding methods and seedling breeding of hybrid quail are basically the same as those of common bream. The method is as follows: Adult fish ponds are mainly cultured in mixed stocks, summer flowers are mainly used for stocking, and fish species are released in spring. Generally, 50 to 100 tails per mu, or 10% of the total stockings, are used. about. The size of the breeding stocks for cage breeding is 30 to 100 grams per tail and 5 to 10 kilograms per square meter. According to a joint cage culture aquaculture trial carried out by Shandong Ocean University and other institutions, a total of 756 tails of A. japonica were stocked with about 3 grams per square meter, cultured for 4 months, and fed with pellet feed. The feed ratio was 1.39, and the survival rate was 73. %, can produce 56 kilograms of hybrid quail per square meter, up to 66 kilograms of hybrid quail per square meter. If paddy field breeding is cultivated as a hybrid carp species, 10,000 to 15,000 summer flowers can be planted per mu, and 5,000 to 8,000 fish species can be produced per mu. If the fish is raised, 500 to 1,000 tails of large-size hybrid mullet species can be stocked, and 100 to 200 kg of adult fish can be produced per mu.
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