Breeding techniques of frogs

Frog breeding techniques and methods: frog pond construction, frog breeding care, frog breeding management, frog breeding tadpoles, spawning, hatching, tadpole feeding management, grading feeding, strengthening domestication, bait source, bait domestication and adult frog feeding management.

1. Construction of frog pond: The size of frog pond can be flexibly controlled according to the actual situation. A fence fence is used around the frog pond, and the height of the fence is about1.5m to prevent the little frog from escaping or being fed by snakes. It is best to build a frog pond around the residence for easy management. Both sides of the frog pond can be provided with water inlet and water outlet respectively, and sealed with iron branches and dense-eye polyester net to prevent escape. Aquatic plants and shrubs should be planted around the frog pond to facilitate the life of adult frogs. Small frog culture pond is divided into spawning pond and tadpole pond to synthesize frog pond. Generally, it is advisable to choose humid, cold, warm and sunny areas, and strip-shaped aquaculture ponds or soil ponds are the most suitable.

2. Care of breeding frogs: Before the cold winter comes every year, the water surface should be drained, but it is often kept moist, which creates a resource advantage for breeding frogs to sleep in mud pits. The key technology of raising young frogs is artificial propagation. Because there is a kind of sparganosis in the muscle tissue of natural frogs, it can be effectively avoided to protect adult frogs with artificial eggs. Sow the seeds according to the relative density of frogs per 3 square meters (about 1 group) (the capital investment is better before May). It is stipulated that the breeding frogs are thicker, and it is appropriate to give birth to 1~2-year-old parent frogs. The ratio of male and female mixed free-range breeding is 3: 1, and the stocking density is less than that of meat frog. It takes about three years from young frog to estrus.

3. Frog breeding management: protein should improve feed feeding, mainly loach, supplemented by attracting moths. Maintain a stable balance between water surface and live fat. When the water temperature is kept below 22℃, the eggs are ready to hatch (at this time, the male frog keeps barking). A female frog over 50 grams can lay many eggs at a time. Generally speaking, females and males lay eggs on aquatic plants. Frog eggs are light yellow and ring-shaped, and one of them is attached to the collagen fiber egg membrane and floats on aquatic plants, which is very easy to identify.

4. Breeding frogs and breeding tadpoles: After the Spring Festival every year, it is advisable to put a proper amount of water in the frog pond to let the female frogs breed tadpoles. After breeding tadpoles, frogs should be protected from swallowing tadpoles.

5. Spawning: Synthetic spawning grounds must be in clean waters. Generally, the method of laying eggs in cages is used to force frogs to lay eggs in bamboo baskets or cages. The ratio of female frog to male frog is 1: 1, and five egg baskets or cages can be placed in 20 square meters for laying eggs. The deep water surface should be kept at 10~ 15cm, and the water temperature should be kept at10℃ ~1℃. for

6. Incubation: During the incubation period, the temperature of frog sperm eggs should be kept at 20℃~28℃, which is usually naturally hatched; Plastic film can also be used to cover the incubation method and waterless incubation method. Generally, all tadpoles can hatch in 3~5 days. Newborn tadpoles depend on the egg membrane to survive safely, so don't stir the water. After all the little frogs have laid their eggs, take them out of the pool so as not to affect the hatching and the living conditions of tadpoles. After 5 days of incubation, eggs can provide fine feed, such as bean paddles, egg yolks, Daphnia, zooplankton, etc. in water, which can be raised twice a day, but the total amount of feed should not be too much to prevent the water body from becoming malignant and tadpoles from dying. After 1 week feeding, tadpoles can be moved into the feeding pond for feeding.

7. Feeding management of tadpoles: The artificial feeding of small frogs needs to be hatched after artificial egg collection. The hatched tadpoles are cultured in the original incubation pond or cage, and 600~800 tadpoles are scattered on the river surface per square meter. Tadpoles begin to be artificially fed on the 4th day after hatching. Tadpoles must be kept for one week and then moved into the feeding pond. After about 20~30 days, red nematodes, Daphnia and fly maggots gradually became the dominant foods, and watercress, bean paste residue, bean cake powder and Chlorella could also become the dominant foods. Adding certain feed can promote their growth and development.

Generally 15 cooked eggs are broken, and water is sprayed 1~2 times per 10,000 tails. After the fifth day, switch to concentrated feed of soybean meal, bran and bean curd residue with leucorrhea, or concentrated feed of chaff and feed, and invest 1~2 times a day. Concentrated feed is popularized on the bait table, and powdered bait is stirred with tap water before pouring. If bubbles are found on the water surface or the water body smells, the tap water should be replaced immediately, usually once every three days, and once every two days when the weather is dry for many days. Management method of tadpole super metamorphosis: frog eggs hatch for more than 70 days and become young frogs. The metamorphosis of tadpoles from their front legs mainly depends on the digestion and absorption of their tails, breathing gas through their lungs and starting to jump out of their registered habitats. If more than 90% tadpoles become young frogs, they can be moved into the young frog pond for feeding.

8, grading feeding, strengthening domestication: Because of the fierce personality of small frogs, it is very common for big frogs to eat small frogs and other survival of the fittest. In order to avoid this behavior, small frogs of the same size should be graded and raised together, and more importantly, they should raise their hands and cast enough bait to make them full and not eat each other.

Selection, classification and separate breeding: young frogs are raised for 20-30 days, the water surface is drained, and large-scale young frogs are transferred to adult frog ponds for breeding according to the relative density of 60-80 frogs per square meter; Small-sized baby frogs are still kept in the original pond. Feeding, indoor stereo and double cage gathering are new methods to raise frogs. Using plastic boxes and wooden boxes to breed frogs, the output of small-scale breeding is very high, and hundreds of frogs can be raised per square meter. Generally, frogs only need five months from hatching to adulthood. Intensive feeding: intensive feeding is adopted. According to the relative density of each square meter 100 ~ 150, the young frogs can be fed in a breeding pond with clean inner cavity and relative height greater than 1 m. The water level of the pond is about 20 cm, and a bait table is placed on the water surface. There is no land in the pond to drive the young frogs to concentrate on foraging and perching.

9. Source of bait: Little frogs are too carnivorous, and loach, insects, fish, shrimp, crab, snails and mussels are all their delicacies. In order to ensure that the source of the bait can be contacted with the merchants dealing in chickens and ducks in the surrounding cities, give him a moderate deposit to let them keep the chickens and ducks and large intestine and lungs discarded every day for themselves, and then chop them up as bait. You can also boil some tea bran water and introduce it into fertile soil such as banana roots, trunks or garbage pools. Before long, many loaches will emerge one after another and be caught as bait.

10. Bait taming: Because little frogs like to feed in the water, they don't like to feed on the road, so they should put the bait fund on the water to make it convenient for little frogs to feed. Feed fresh bait 1~2 days first, add 20% artificial concentrate to the bait on the third day, and then the proportion will increase day by day. After 10, it will increase to 80% live bait, mainly including loach, fly maggots, small fish and shrimp, insects, scorpion cattle, loach fish and so on. "Dead bait" refers to dried silkworm chrysalis, animal liver and concentrated feed. The activity of "dead bait" is too large to eat artificial bait at all. It is also necessary to conduct timely and quantitative analysis and accurate positioning of the feeding. Feeding time in spring and autumn is around lunch, in the evening or morning in summer, feeding 1~2 times a day, and each feeding needs more than 1 hour for young frogs to eat. The food intake of young frogs weighing less than 50 grams should account for 6 ~ 8% of their body weight; For young frogs weighing over 100g, the feeding amount should be 8~ 10% of the body weight. The bait should be fresh, tidy and nutritious.

1 1. Feeding management of adult frogs: After the young frogs are transferred to the adult frog pond, the young frogs eat more and grow faster, which is the key stage to produce product yield. In addition to adequate feed, the super metamorphosis of tadpoles into frogs also needs to improve the feeding of animal feed, usually artificially cultivated high-protein foods such as maggots, loaches, red nematodes, ladybugs and other high-fertility live bait.

When the live bait is not good, it can be mixed with mixed feed, such as rapeseed cake (powder) 60%, chaff (or bran) 30%, soybean protein powder 5% and feed 5%, which can achieve better symmetry effect. Tadpoles are very active in water. After 5 days, they can provide concentrates, such as bean paddles, egg yolks, Daphnia, kale, tomatoes and zooplankton in the water. In addition, to raise earthworms on the mound, it is only necessary to drop some lime slurry with a concentration of 3~5% on the mound every evening, and loach can be used as bait for frogs. It is also necessary to feed some concentrate properly, and must be fed separately to adjust the relative density of feeding. After 1 month, when the net weight of adult frogs reaches100g, the relative density of breeding is 30 per square meter, and it is changed to 10~ 15 per square meter two months later. After a short period of breeding, it can be sold as a finished frog.