Bullfrog breeding methods and techniques

At present, many farmers in our country raise bullfrogs . The meat of bullfrogs is relatively firm and low in fat. Although it is quite controversial, there are still many consumers who like to eat bullfrogs. Let’s learn about the breeding methods and techniques of bullfrogs.

1. Frog breeding

The frog breeding pond is usually a long mud-bottom cement pool of 20 to 50 square meters with a depth of 0.8 to 1 meter. There is a land island in the pond, equipped with 2 to 3 feeding tables and a shade shed. The pond is surrounded by land for the young frogs to live in, which accounts for more than 1/4 of the water area and is planted with leafy plants. Aquatic plants also need to be planted in the pond. Some artificial caves are set up on the pool wall to allow young frogs to overwinter and satisfy their burrowing habits. In order to prevent frogs from escaping and harmful organisms from invading, escape prevention facilities need to be set up around the frog pond. Use quicklime to clean and disinfect the pond 10 days before stocking. Fill the pond with 20 cm of water 2 days before stocking, and then gradually increase the water level.

The stocking density is: 100 to 150 young frogs that have just metamorphosed/square meter, or 80 to 100 young frogs weighing 25 to 50 grams/square meter. As the young frogs grow larger, the stocking density decreases accordingly.

The newly metamorphosed young frogs need to continue to be fed live bait for 1 to 2 days, and then they can begin to be trained to eat. First, put live small fish into the bait table and adjust the height so that the small fish can only lie horizontally and jump but not swim, to lure the young frogs to come and eat. After 2 days, cut the meat or internal organs of chicken, fish, etc. into strips and mix them with the live bait to feed the frogs. The size should be what the young frogs can swallow. Then make the artificial bait into soft pellets of appropriate size and slowly throw them onto the bait table, or directly feed the puffed bait to lure the young frogs to eat.

Insects are ideal bait for young frogs, so you can take advantage of the insects' phototaxis and install a double layer of black light above the pool to attract insects for the young frogs to eat. But the main thing is to feed artificial bait, 1 to 3 times a day, and the amount of each feeding should be enough for the bullfrog to finish eating in about 1 hour.

During the breeding period, the water should be changed regularly, 2 to 5 times a week, with a volume of 5 to 20 cm each time, and a certain amount of micro-flow of water should be maintained. Sprinkle 15 mg/L quicklime regularly once a month to keep the water fresh. Cultivate them in a timely manner according to the specific situation to prevent cannibalism. Patrol the pond more than three times a day to observe the feeding conditions of the young frogs and take timely measures if any abnormalities are found.

2. Adult frog breeding

Adult frogs are mostly raised in earthen ponds, which are the same in shape and structure as juvenile frog breeding ponds, with an area of ​​200 to 1,000 square meters and a relatively high escape-proof net (1.2 to 1.5 meters). The stocking density should be determined according to the stocking specifications. Frogs weighing 30 to 100 grams are generally stocked at 20 to 50 per square meter. During the breeding process, they should be regularly graded and divided into ponds for sparse stocking. Daily management is basically the same as that for raising young frogs. Adult frogs eat a lot, so the amount of water they need to change is larger than that of young frogs. When the water temperature is high in summer, it is best to change the water 1 to 2 times a day, changing 1/2 of the pond water each time.

3. Rice field farming

Rice fields are the natural habitat of frogs, suitable for their life and growth; frogs are also the natural enemies of crop pests. Therefore, raising frogs in rice fields can not only reduce rice diseases and pests, but also increase income.

Rice field selection: Rice fields for frog farming require that there is no shortage of water during droughts and no flooding during rains. It is advisable to choose rice fields with sufficient water sources, convenient drainage and injection, good water retention, and wide and strong ridges. The area should be between 666 and 1,300 square meters.

Paddy field preparation: Before transplanting rice seedlings, the paddy field should be fully fertilized once. Before raising frogs together, raise and reinforce the ridges, and dig a "cross" or "field" shaped protective ditch in the rice field, with a width of 60 cm and a depth of more than 50 cm. You can also dig a few protective pits of about 2 square meters and 80 centimeters deep between the inlet and outlet and the rice field to provide shelter for frogs when the fields are drying, there is a temporary lack of water, or when pesticides are sprayed.

Installation of anti-escape facilities: Frogs are good at jumping, especially bullfrogs, which can jump up to 1.5 meters high. Therefore, doing a good job of escape prevention is the key to successful breeding. Anti-escape facilities consist of two parts: anti-escape walls and anti-escape fences. ① The escape-proof wall around the rice field can be made of cheap plastic window screens or plastic films, with the bottom buried 15 cm in the soil. It is better for the entire escape-proof wall to be slightly tilted inwards. When setting up an escape-proof wall, drive a wooden stake every 1 to 2 meters to fix and support the escape-proof wall. ② The anti-escape fences at the inlets and outlets should be as dense as possible and firmly installed.

Frog mixed breeding: Frog mixed breeding should be carried out 2 weeks after transplanting the seedlings, after the seedlings turn green and survive. Tadpoles are easily eaten by various pests such as eels, loaches, and miscellaneous fish, have a low survival rate, and cannot grow into commercial frogs during the rice growing period. Therefore, it is best to raise young frogs together. The number of mixed-breeding frogs depends on the amount of artificial feeding. Generally, 300 young frogs weighing 20 grams per tail can be released per 100 square meters. You can also raise some fish fry at the same time as fresh bait for frogs.

The above is an introduction to the key points of bullfrog breeding techniques. Breeding bullfrogs requires certain conditions, and all aspects must meet the standards. Do you want to breed bullfrogs?