What conditions are needed for bullfrog breeding?

Bullfrogs originated in several states in the eastern United States, and were later introduced into western states and other countries. Other large frogs are also known as bullfrogs, such as box-headed frogs in Africa, tiger frogs in India and small-toed toads in South America. It has the advantages of fast growth, delicious taste, rich nutrition and high protein content. Let's take a look at the conditions needed for bullfrog breeding.

Pond conditions of bullfrog

Bullfrog pond culture requires adequate water source, convenient drainage and irrigation, no pollution, quiet environment, convenient transportation, adequate power supply, usually one large pond for every 100 square meters, and each large pond is divided into four small ponds on average. The edge of the pool is surrounded by 40-mesh sieve silk, which is about 1 meter higher than the bottom of the pool, and the bottom of the sieve silk is 20-30 cm buried in the soil. The ridge of the pool is 40 cm high, the slope ratio of the pool is 1 ∶ 3, the water level is 30-40 cm, and the depth of the water body is not less than 20 cm. The inlet and drain are arranged at the opposite corner of the big pool. Each pool puts four 80 cm × 40 cm foam plates as the bullfrog's rest table and uses a black sunshade net to shade the sun.

Food habits of bullfrog

The food composition of bullfrog is mainly animal feed, especially like to eat live bait, and its eating habits are different at different stages of development. Tadpoles can be fed with egg yolk, blood powder, horn powder, soy milk, wheat bran, flour and so on. The food range of young and adult frogs includes annelids such as earthworms, arthropods such as crustacean shrimp, molluscs such as snails, clams, larvae of fish, amphibians, reptiles and internal organs of mammals. Bullfrogs are greedy by nature and eat a lot in the growing season. When feeding on a bait plate, groups scramble for the top plate. Weak and small ones are often squeezed out of the plate, and the phenomenon of big frogs eating small frogs often occurs. Therefore, artificially farmed bullfrogs should be separated from each other in order to avoid cannibalism of the same kind as far as possible.

Culture techniques of bullfrog

1. Seedling stocking: bullfrogs are disinfected with 50 kilograms of quicklime or 10 kilograms of bleach powder per mu before stocking, and can be released 10 days after clearing the pond. Young frogs are soaked with 20 mg / L potassium permanganate solution for 10 minutes before stocking, 60 per square meter for young frogs and 30 per square meter for adult frogs.

2. Pool inspection: patrol the pond once a day in the morning, in the middle and in the evening to prevent bullfrogs from escaping. The running water is guaranteed 24 hours a day, and the daily water exchange rate reaches 300%. The water level can be controlled by the rise and fall of plastic intubation at the outlet. The water depth of the pond is generally 30cm to 40cm. Measures were taken in time to find abnormal food intake and activities of bullfrogs.

3. Feed feeding: the feed is mainly floating formula feed. Soak the formula feed with water half an hour before feeding to promote softening and expansion. The daily feeding amount is 7%-15% of the total number of frogs in the pond, and timely adjusted according to the climate, water quality and residual bait. It is appropriate to finish the feeding within half an hour. Bullfrogs should be raised by grades, and the individuals with larger sizes should be graded and screened in time, and the bullfrogs with similar specifications should be adjusted to the same pond for breeding.

4. Disease prevention and control: before stocking, bullfrog seedlings are disinfected with quicklime or bleach powder to kill enemy organisms and pathogens, and regularly sprinkled with bleach or strong chloroform in the whole pond. After dividing the pond, the frog body was disinfected with 20 mg / L potassium permanganate solution to prevent mechanical damage. It was found that diseased frogs and dead frogs were picked out and raised in isolation in time, and disinfected with high concentration of bleach or potassium permanganate solution.