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First, the broodstock source and cultivation At present, the broodstock is mainly cultivated with rouge fish fry to sexual maturity (about 6 years to 7 years) individuals artificial breeding. The amount of water for broodstock cultivation is appropriate from 600m2 to 1300m2, and the water depth is preferably 1.6m to 2.0m. The fertilization in the pool is strictly prohibited. The submerged plants in the pond can be properly planted with submerged plants such as eye dishes, bermudagrass and goldfish. Algae, etc., in order to absorb the pool fat. The broodstock can be stocked from 10 to 15 fish per acre, generally 5% to 20% of the total weight of the fish, and the daily feeding amount should be appropriately adjusted according to the water temperature and feeding conditions, so that the fish can be fed and there is a slight surplus. The bait is mainly otters or clams, supplemented by a small amount of river clams or spirochetes. It is forbidden to stock cockroaches, clams, and herrings to the rouge fish pond, but it is possible to stock up with a small amount of sturgeon and eel to clean up the plankton in the pool and make the water clean.
Second, the artificial breeding of puffer fish breeding season is from convulsions to Ching Ming, Ching Ming gonads began to degenerate. Therefore, when peach blossoms are in full bloom, it is the period of production. Appropriate production water temperature is 15 °C ~ 21 °C, per kilogram of body weight of the European ketone 1 mg ~ 5 mg plus salmon gonadotropin-releasing hormone analogues 3 micrograms ~ 50 micrograms, the male fish oxytocin dose reduction by female oxytocin half. For females with poor sex gland maturity, 2 to 3 injections may be taken. Each injection may be separated by 1 to 3 days.
Third, artificial insemination When the oxydotic pool water temperature reached 16 °C ~ 18 °C, 29 hours after every 1 hour to check the situation of automatic fertilization of female fish, while rushing to the urine pool flushed water to stimulate the female. When the outflow of eggs from the tail of the female is found, artificial insemination should be performed immediately. Simultaneously squeezing the semen and eggs into a basin containing physiological saline, stirring it with feathers for about 5 seconds, then pouring it into the wash bowl containing the aqueous solution of milk powder, detacking and inseminating, stirring with feathers for 1 minute, then Rinse with clean water 3 times, wait 3 hours, the egg absorbs water and swells. The volume of eggs per ml is 12 to 16 capsules.
IV. Artificial hatching Use hatchery loops or hatching buckets to conduct water hatching. The hot springs are best at the water source, otherwise heating is required. In the incubation process, the water temperature needs to be maintained at 18°C ​​to 20°C, dissolved oxygen is above 4 mg/l, and 250,000 eggs can be laid per cubic meter of water. After 6 days the seedlings are gradually released from the membrane. At this time, the fry body is transparent and slender, with a total length of 9.5 mm to 11 mm and resting on the bottom, so the air pump is used to continue oxygenation. The fish began to swim horizontally on the 6th day after the fish was released. The fish ticket was visible and the total length increased to 14 mm.
The artificial reproduction technology of carp
There are a lot of local names for rouge fish, such as yellow row, redfish, blue whiting fish, purple mullet, pond fish, and burning oysters. The rouge was originally an economic fish of the Yangtze and Lancang Rivers. It has the advantages of rapid growth, large size, less disease, miscellaneous food, easy fishing, and delicious meat. It is a rare fish in China and is listed as a national second-class animal protection. . In addition, the three spots on the body of squid larvae are very beautiful, and there are great enthusiasms of tropical fish, but there is no shortcoming that tropical fish is difficult to overwinter. Therefore, it is also a popular ornamental fish with extremely high economic value. The artificial reproduction technology of rouge fish is introduced as follows: