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1. Strict screening of parents: Only high-quality parents can guarantee the supply of high-quality seed. From the broodstock's age, posture, posture, color, physical fitness, sexual maturity and other aspects of the strict selection, generally used in the parental goldfish required fish age of about 3 years, small age of the offspring of individual offspring of small-scale development of the county; fish age Large, more deformed eggs. The posture requirements are symmetrical, graceful, graceful, graceful, graceful, dynamic, and strong in motion. The sense of balance when stopping is also strong; the colors require bright and attractive, the monochromatic fish requires pure color and no miscellaneous pattern, and the two-color fish requires color miscellaneous Indiscriminately, the streaky fish requires a reasonable mix of color and color. The physique requires health and no disability, the activity is responsive, the fins stretch vigorously, and the breathing is well-balanced; the sexual maturity requires fullness in addition to the requirements on the age of the fish. Feng Qi, the outline of the female goldfish ovary is clearly visible.
Second, to strengthen prenatal cultivation: When the earth returns to spring, when the temperature rises to 10-12 degrees, the goldfish has a desire to ingest. At this time, the selected parents can be cultivated separately according to male and female, and the following work will be mainly done. The first is to increase the temperature and keep warm to prevent sudden temperature changes. Once the temperature difference changes too much, it will directly affect the further development of the goldfish. The second is to timely change of water and prevent diseases. When spring arrives, the parents should go out in time to grow and develop in a natural state. At this time, the water changing work should be done well. When changing the water, it should be carried out in small quantities several times in batches. The amount of water for each change accounts for 1/6 or 1 of the pool water. 5, change again every 2 - 4 days, be careful when operating, do not move, less scared, we must pay attention to the operation with water, parents can not easily leave this operation. During specific operations, use a small bowl to gently pick up the fish in the direction of advancement (with water). Do not touch the fish. Bring the fish back to the pool and wash the fish with 5% saline for 10 minutes. Prevent and disperse waterfowl and mice. Natural enemies, such as snakes, are better able to pull a dense mesh in the pool to prevent natural enemies from invading; early illnesses include colds, hot tails, water mold, and fins, etc. Prevention work should be done. Once the disease occurs, it will have a great impact on the parents. The re-screening of the parents after recovery.
Third, the male and female with a reasonable: male to female ratio of 2:3 is a reasonable ratio of the way, if the male body is robust, the fish body is large, the ratio can be 1:1. This can ensure that the fertilized egg deformity is low and the hatching rate is high. When the temperature is suitable and the environment is good, the sexual maturity and development of the parents should be monitored at any time. The bred male and female broodstock should strengthen the aphrodisiac in a spawning pool 3 to 5 days before the onset of labor.
Fourth, to create a spawning environment: Goldfish spawning quiet and comfortable environment, do not bother to startle, you must not be free to take. Eggs produced by goldfish are viscous eggs, and can be used to build ovaries by using aquatic plants such as amaranth and Malay-seeded vegetables, palm husks, willow roots, poplar stalks and bamboo shoots, and broken mesh pieces. The use of submerged plants is generally preferred. On the one hand these aquatic plants can simulate the natural environment and on the other hand can produce photosynthesis to supply oxygen. The ovaries are made by removing the roots of aquatic plants, tying the middle of the grass with a string, using the stones as sinks, and suspending them in water. The upper part of the grass stems is stretched to form an umbrella. Disinfect with 5% saline for 15 minutes or dip for 10 minutes with 10ppm potassium permanganate solution. Palm and poplar must be boiled with 10% saline for 10 minutes and then dried.
5. Science and regulation of water temperature: The optimum temperature range of goldfish is 12--30 degrees, and the best breeding water temperature is 18--20 degrees. When the water temperature is higher than 14 degrees, the pro-fish can spawn below 10 degrees or higher than 32 degrees. Spawning is interrupted. Therefore, attention should be paid to the scientific regulation of water temperature during temperature changes and water changes, and the temperature difference should be within 2 degrees.
6. Pay attention to weather changes: Weather changes play an important role in broodstock breeding, especially in outdoor breeding. A constant water temperature can stabilize the health of broodstock well, and can artificially regulate time, making goldfish breeding more controllable, and the weather temperature. Suitably, rich oxygen can help the breeding of goldfish.
Seven, moderate aphrodisiac stimulation: divided into two kinds of physiological stimuli and external stimuli, can be artificially controlled, moderate stimulation can trigger a large number of broodstock spawning. Physiological stimulation means that during the breeding season, mature broodstocks chase each other and promote both parties to achieve excitement and complete spawning. External stimuli are mainly stimulated by outsiders, firstly through changes in light intensity; second, creating a micro-flowing environment; third, changing the water temperature; fourth, artificially setting up a fish nest; and fifth, adding hormones to food.
Eight, to strengthen water quality regulation: a constant water quality can stabilize the broodstock's desire to lay eggs, so that it has a planned development, once the change in the water environment, a large number of and repeated replacement of water, will make the broodstock in the new water to stimulate rapid spawning. The water quality during the reproduction must be well controlled. The water temperature is constant at 18-20 degrees, the dissolved oxygen is controlled at 5mg/L or more, the ammonia nitrogen concentration is lower than 0.05mg/L, and the pH value can be maintained at about 7.2.
9. Incubate fish eggs in time: Many goldfish have the bad habit of eating fish eggs after spawning. Therefore, once spawning is finished, the eggs are picked up with pots and put into a special pool for hatching. After confirming that the broodstock has spawned, the broodstock can be fished out and put into a special pool for cultivation. The ovaries are left in the original pool and incubated with microfluidic water (flow control is around 0.1m/s).
X. Postnatal broodstock rearing: The body of a broodstock is extremely weak after spawning, and its ability to resist pathogens is reduced, and it is easy to become ill and cause death. After spawning, care should be taken in a timely manner with a medicinal bath to create an excellent habitat, feed high-quality bait, and live bait is preferred.
10 points of fish breeding
Goldfish has won the love of the people of the world with its elegant and graceful posture, beautiful and graceful posture, and charming appearance. It has become one of the most important products for the export of aquatic products in China. Its development potential is huge and its prospects are bright. Good goldfish must be based on good seedlings, and good seedlings are closely related to the reproduction of goldfish. When breeding goldfish, we must correctly master 10 technical points in order to achieve good results.