Nutritional value of bullfrog _ culture technology of bullfrog _ market price of bullfrog

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Growth habits of bullfrog

Bullfrogs live in lakes, ditch ports, ponds and other water environment and nearby land, and usually like to live in ditches and ponds. If there are floating plants on the surface of the water, then lie on the water plants, only with the head out of the water, and dive into the water in case of disturbance.

Bullfrogs have the characteristic of living in groups, often a few or dozens of them live together in one place, and after adapting to the environment, they will not move casually. In early May, bullfrogs bark especially. One frog cries first, and the other frogs sing in unison. They bark harder at night than during the day, and then they hug each other and lay eggs. The spawning period lasted for about 70 days from mid-July. The eggs are flaky and float on the surface with the help of water plants. The fertilized egg hatches into tadpoles, lives in water, and then metamorphoses into frogs. Live an amphibious life.

When the water temperature drops to about 10 ℃ in winter, bullfrogs begin to hide in caves or mud and stop moving and feeding. However, when the temperature rises to more than 10 ℃, they come out to look for food again, even in winter, so bullfrogs have no obvious dormancy period in Dongting Lake.

What kind of food does bullfrog eat?

Bullfrogs are mainly animal feed, and live insects like it best. In different stages of development, eating habits are not the same.

1, tadpole period can be fed with egg yolk, blood powder, horn powder, etc., can also use soybean milk, wheat bran, flour and so on.

2. The food range of young and adult frogs includes annelids, such as earthworms, arthropods, such as crustacean shrimp, molluscs, such as snails, clams, fish, amphibians, reptiles and internal organs of mammals.

3. Bullfrogs are greedy by nature and eat more in the growing season. When feeding with a bait plate, groups scramble for the top plate, and the weak and small ones are often squeezed out of the plate. The maximum stomach volume of bullfrog is 10 times that of empty stomach. June to August is the peak feeding season, with an average intake of 160 g artificial feed per month. It is appropriate to eat an average of 5 grams a day.

4. Bullfrogs are ferocious, and it often happens that big frogs eat small frogs. In this case, artificially farmed bullfrogs should be separated in size to avoid cannibalism of the same kind as far as possible. Bullfrogs can eat and endure hunger. When food is extremely scarce, the metabolism of bullfrogs decreases naturally. During the period of low temperature hibernation, bullfrogs can withstand hunger for 4 months to 1 year, and their weight is greatly reduced.

The breeding method of bullfrog

1. Rough farming in the field: rough farming in the field is to make full use of natural bait and other natural conditions, delineate the scope of breeding, put in bullfrog seedlings, properly increase bait, and harvest and capture regularly. This kind of method is characterized by large breeding site, small investment, large income, less human intervention, but low yield per unit area. According to the daily management, this kind can be further divided into two types: all-natural stocking and semi-rough farming. The common culture methods are: reservoir culture, swamp culture, lake culture, river culture, rice field culture.

3. Intensive intensive farming: intensive farming is a kind of intensive farming method which uses artificial bait and non-agricultural cultivated land to build ponds and carry out fine management. This method is characterized by high culture density, high yield per unit area, high input and high output, and remarkable economic benefits. in recent years, this method has developed rapidly. According to the difference of breeding site, intensive culture can be divided into the following culture methods: pond culture, field culture, courtyard culture, indoor culture and constant temperature culture.

Feed culture technology of bullfrog

1. Breeding earthworms: on the land in the bullfrog pond, put cow dung, rotten fruit, rice washing water, etc., mix with the soil, put into the kind of earthworms, let them reproduce. After a period of breeding, earthworms are unearthed at night and can be preyed on by bullfrogs. You can also use sporadic wasteland and apply enough cow dung to cultivate earthworms, which can produce 5-7 kilograms of worms per square meter.

2, light lure insects: above the frog pond food table, 23 cm from the water, hanging 30 watts of black light or purple light, can trap insects, planthoppers, etc., bullfrogs will gather under the lights to hunt at night. The effect of this method is the best from May to September. The lights should be turned on after sunset to the middle of the night, where there is more dew and fewer insects, and the lights should be turned off to save electricity.

3. Culture of Oncomelania hupensis: using sporadic ditches and ponds or building small ponds, you can also breed and breed in frog ponds. In the high temperature season, you can produce a peach-red egg every 5-10 days, each egg has about 1000 eggs, and the small snails hatched through the broken membrane can be used as bullfrog feed.

4. Sericulture: silkworms grow fast by planting mulberry in front and behind the house, and it takes only about 20 days in a lifetime. Young silkworms can be used to feed young frogs, up to 4.5 and 5 years old, and can be used to feed adult frogs.

5. Raising Tenebrio Molitor: Tenebrio Molitor is the best feed for bullfrogs, which is easy to raise and can be fed only with wheat bran and green vegetable leaves. However, the insects grow slowly, and the feeding quantity must be expanded in order to ensure the feed supply.

6. Luring flies and raising maggots: large mouthbasins and trays are hung 30 centimeters above the bullfrog culture pond, and baits such as waste animal meat and fish offal are placed inside to lure flies and maggots. When the maggots crawl out of the basin mouth and fall into the water, they become a delicacy for frogs. You can also build a small pool, put bean curd dregs in the pool, put rice washing water, etc., cover the surface of the pool, breed maggots in a few days, and then feed bullfrogs.

7. Cultivate water fleas: water fleas, commonly known as "red insects" and "fish insects", are ideal feed for tadpoles. First drain the water in the culture pond, clear the pool after disinfection, sprinkle 1 kg of dried chicken dung, bean curd residue, etc. (or other livestock and poultry fertilizer) in each square meter pool, preferably after a week of sunlight exposure, pour water 40 cm, and put into the water flea provenance, the pool water turns green after a few days, and a large number of water fleas can be propagated in the pool water two weeks later.

8. Use leftovers: disinfect and mash the leftovers of meat factories and restaurants, mix them into mixed feed and feed them. Where there is a silk reeling factory, silkworm chrysalis can be used as feed, and pig lungs and cow lungs can be purchased, chopped and fed.

9. Catch small fish and shrimp: a breeding site located near a river, lake or fish pond, which can often catch wild fish and shrimp as feed.

The breeding value of bullfrog

1. Bullfrog has rich nutritional value and delicious taste. Every 100 grams of frog meat contains 19.9 grams of protein and 0.3 grams of fat. It is a nutritious food with high protein, low fat and low cholesterol.

2. Bullfrogs have the effect of nourishing and detoxifying. People with poor digestive function or excessive stomach acid and people with weak physique can be used to nourish the body.

3. Bullfrog can promote exuberant qi and blood, full of energy, nourish yin and yang, nourish the mind and calm the mind and replenish qi, which is beneficial to the rehabilitation of the patient.

4. The viscera and scraps of bullfrog are rich in protein, which is hydrolyzed to form compound amino acid. Among them, the content of arginine acid and lysine is high, which is a good food additive and tonic. Hydrolyzed compound amino acid, separated and purified, used in medicine and cosmetic industry.

5. The endocrine system of bullfrog secretes various hormones, which can be extracted and used in medicine, industrial production and scientific research. For example, pituitary hormones can be used as artificial induction agents for fish and amphibians, which is conducive to artificial reproduction.

6. The gastric gland, intestinal gland and pancreas of bullfrog are rich in digestive oysters, especially those of hydrolyzed protein, which can be extracted and used.

7. The bile of bullfrog is extracted and can be used as medicine after processing.

8. Frog skin can be used as an excellent raw material for surgical line.

9. Frog oil can be used to make advanced lubricating oil.