CATDOLL : CATDOLL: What are the frog breeding techniques and methods?

Frog breeding technology

Frogs live in ponds, ditches, and rivers, in the grass and rice fields, and prey on insects, mainly agricultural pests. Adult frogs live in both water and land, hiding in the grass or rice fields during the day and coming out at night and early morning. When the temperature drops below 10℃, frogs hibernate by the water or in the soil, and come out in the spring of the following year.

Frog breeding technology 1: construction of breeding pond

Construction of breeding ponds Frog breeding ponds are divided into spawning ponds, tadpole ponds and adult frog ponds. Generally, it is advisable to choose a place that is both humid and warm and out of the sun, and a long cement pond or earth pond is preferred. A large outdoor pond is 4×6 meters, and it is best to apply cement to the wall, and leave mud on the bottom of the pond; a small courtyard pond is generally 1×1.5 meters to 2 meters, and the pool is generally 1 meter deep, with irrigation holes and drainage channels, and a water depth of 20~50 cm. Shade boards must be installed on the surface of the pool. Generally, 40 adult frogs can be raised per square meter.

Frog breeding ponds can be made of earthen ponds, brick ponds, or rice fields. The key is to prevent them from escaping. If conditions permit, brick walls can be built or nets can be used, usually 1 to 1.2 meters high. The water in the pond is 30 to 60 centimeters deep, and a mound of soil is piled up in the middle of the water or on the sunny side as a terrestrial habitat for frogs, accounting for about 1/3 of the total soil. Grass or crops are planted on the mound.

Frog breeding technology 2: tadpole breeding

The artificial breeding of edible frogs must start from artificial egg collection and hatching. The tadpoles after hatching should be cultivated in the original hatching pond or cage, and 600 to 800 tadpoles should be released per square meter of water surface. Artificial feeding begins on the 4th day after the tadpoles hatch. The tadpoles need to be raised for a week before being moved into the breeding pond. After about 20 to 30 days, red worms, water fleas, and fly maggots can gradually become the main food. Soy milk, bean dregs, bean cake powder, and chlorella can also be the main food. Adding a certain amount of fish meal can promote its growth.

Generally, 15 cooked eggs are crushed and fed with water 1-2 times for every 10,000 fish. After the 5th day, soybean milk, wheat bran, bean curd residue or rice bran and fish meal are used as feed, which are fed 1-2 times a day. The feed is placed on the feeding table, and the powdered bait is mixed with water to make it viscous before feeding.

Frog breeding technology three: tadpole management

When you find bubbles in the pool water or the water has a foul smell, you should change the water immediately. Generally, change the water every 3 days. When the weather is dry for many days or the temperature is high for consecutive days, change the water every 2 days.

Metamorphosis management: Frog eggs will turn into young frogs about 70 days after hatching. From the appearance of forelimbs to complete metamorphosis, tadpoles mainly rely on the tail to breathe air through their lungs and begin to jump out of the water to land and live. When more than 90% of the tadpoles have turned into young frogs, they can be moved into the young frog pond for breeding.

Frog breeding technology 4: feeding and management of young frogs

1. Enhanced domestication: Use high-density concentrated captivity with a density of 100 to 150 per square meter. Keep them in a cement pool with a smooth inner wall and a height of more than 1 meter. The pool is about 20 centimeters deep. Place a feeding table on the water surface. There is no land in the pool, forcing the young frogs to come to the table to feed and live together.

2. Bait training: First feed with fresh bait for 1-2 days, then add 20% artificial feed to the bait on the 3rd day, and then gradually increase the proportion, and increase to 80% "live bait" after 10 days, mainly earthworms, maggots, small fish and shrimps, insects, scorpion cattle and loaches, etc. "Dead bait" refers to dried silkworm pupae, animal viscera and compound feed, etc. Use movement to bring stillness, activate the "dead bait", and finally transition to completely eating artificial bait. At the same time, it is required to feed at a fixed time, quantity and location.

Feeding time: around noon in spring and autumn, in the evening or morning in summer, 1-2 times a day, each time feeding should be finished by the frogs in about 1 hour. The amount of feed for frogs weighing less than 50 grams should account for 6-8% of their body weight; for frogs weighing more than 100 grams, the amount of feed should account for 8-10% of their body weight. The feed should be fresh, clean and nutritious.

Frog breeding technology 5: breeding of adult frogs

After the young frogs are transferred to the adult frog pond, the frogs have a large food intake and grow faster. This is an important period for the formation of commercial production. In addition to providing sufficient bait, when the tadpoles metamorphose into frogs, they need to increase the feeding of animal feed, mainly artificially cultivated fly maggots, earthworms, bloodworms, cocci, Daphnia, and other high-protein, high-reproduction rate live baits. In the case of insufficient live bait, mixed feed can be used, such as 60% rapeseed cake (powder), 30% rice bran (or wheat bran), 5% soybean meal, and 5% fish meal. The effect is better if they are evenly mixed. Tadpoles are active in the water. After 5 days, they can be provided with concentrated feed, which is soybean milk, egg yolk, Daphnia, water spinach, tomatoes, and aquatic plankton.

Frog breeding technology The key to frog breeding technology is artificial breeding, because wild field frogs often have a parasite called diplodia that parasitizes in the frog's muscles. The method of artificial spawning and isolating adult frogs can effectively prevent the disease. The frogs are planted at a density of about 1 group per 3 square meters (better before May). The frogs are required to be large and 1-2 years old. The mixed stocking ratio of male and female is 3:1, and the stocking density is relatively less than that of meat frogs. It takes about three years for young frogs to reach sexual maturity.

Frogs have different sexes, fertilization in water, and are oviparous. They reproduce in mid-to-late April each year. During the reproductive process, frogs have a very special phenomenon - they hold their eggs in pairs.

It should be noted that the mating of frogs is not mating, but only a part of the reproductive process. Studies have shown that if male and female frogs are artificially separated (i.e., there is no mating process), then even in the breeding season, the female frogs cannot ovulate. It can be seen that the biological significance of mating is that it can induce female frogs to ovulate.

Generally, frogs lay eggs and fertilize them in water. After the eggs hatch, they become tadpoles and live in water. Then they become young frogs and come out to land and move around. However, the egg-laying method of tree frogs is different. The eggs laid by the spotted-legged tree frog look like a ball of white soap foam or a ball of cream, adhering to the water plants. The most interesting one is the Emei tree frog. It lays its eggs on leaves by the water. The eggs develop in the egg mass and then fall into the lake to continue developing. Another example is the melodious piano frog. Before laying eggs, it will build a mud nest and lay its eggs in it. Some tree frogs do not climb trees, but live in water.

Additional information:

Habitat

Because their skin is exposed, they cannot effectively prevent the evaporation of body water, so they cannot live without water or a humid environment throughout their lives, and are afraid of drought and cold. Therefore, most of them live in tropical and temperate rainy areas, and very few species are distributed in cold zones.

When they are young, they can only live in water, but when they grow up, they can live on land. Frogs breathe with their lungs, but they can also absorb oxygen from the air through their moist skin. The various pigment cells in their skin will also expand or shrink with the humidity and temperature, causing the skin color to change in depth. Frogs usually live in rice fields, ponds, ditches or grass along the river. Sometimes they also lurk in the water, usually hunting at night.

The key to frog breeding technology and frog breeding methods is the place of reproduction and breeding:

The key to frog breeding technology is artificial breeding, because wild field frogs often have a parasite called diplodia that lives in the frog's muscles. Artificial egg-laying and isolation of adult frogs can effectively prevent the disease.

The breeding area is stocked at a density of about 1 group of frogs per 3 square meters (better to stock before May). The frogs are required to be large and fat, and the parent frogs are preferably 1 to 2 years old. The male and female mixed stocking ratio is 3:1, and the stocking density is relatively less than that of meat frogs. It takes about three years for the young frogs to reach sexual maturity.

Reproduction management:

(I) Spawning: Artificial spawning grounds require a still water area, and cage spawning is generally used, which means frogs are forced to lay eggs in baskets or cages. Male and female frogs are placed in a 1:1 ratio, and 5 spawning baskets or cages can be placed in an area of ​​20 square meters. The depth of the pool water should be maintained at 10-15 cm, and the water temperature should be maintained at 10℃-11℃. In order to increase the hatching rate, the eggs can be protected by a fence to prevent them from sinking after being disturbed by the parent frogs.

(ii) Incubation: The temperature of frog fertilized eggs should be kept at 20℃~28℃ during the incubation period, mainly natural incubation; plastic film covering incubation method and waterless incubation method can also be used. Generally, all tadpoles can be hatched after 3~5 days. Newborn tadpoles rely on the egg membrane to survive safely. Do not stir the pond water casually. After all frogs lay eggs, catch the frogs out of the pond to avoid disturbing the hatching and tadpole living environment. Five days after the eggs are hatched, they can be fed with concentrated feed, such as soy milk, egg yolk, water fleas and aquatic plankton, twice a day, but the amount of feed should not be too much, so as not to deteriorate the water quality and cause the death of tadpoles. After 1 week of feeding, the tadpoles can be moved into the breeding pond for breeding.

Feed configuration and feeding method:

1. Feeding: water spinach, tomatoes and aquatic plankton. In addition, earthworms can be raised on the soil pile. As long as 3-5% lime water is sprinkled on the soil pile in pieces every evening, the earthworms will come out in droves and serve as frog bait. Put the puffed feed in a dry place in the frog pond. When the frogs smell the unique smell of the feed, they will crawl over to find food.

2. Formula: fish meal 16%, peanut bran 16%, wheat bran 18%, corn 25%, second-grade flour 20%, bone meal 0.5%, additives (including attractants, adhesives, nutritional additives) 4.5%.