(1) Environmental requirements of bullfrog farms
Choosing a suitable frog farm site is an important work before building a frog farm and should be carefully considered. Bullfrogs like a quiet and warm environment, so the frog farm must choose a place with good water and soil environment, quiet natural environment and plants, zooplankton and insects. It is not suitable to be used as a farm in noisy, noisy, serious vibration and other environments where human activities are frequent, because bullfrogs are not easy to hold their eggs in a noisy environment. If you choose an empty place as a farm, you must plant trees, weed out weeds and grow fruits before you can raise bullfrogs.
Frog farms must have clean and sufficient water sources, such as streams, mountain springs, ponds, lakes and reservoirs. , can keep shallow water about 1 month, and the water area without chemical fertilizer and pesticide can also be used as a farm. Turbid dirty water or polluted water is not suitable for raising bullfrogs, otherwise tadpoles and frogs will die. Frog farm must be drained and irrigated conveniently to ensure that it will not be flooded when it rains heavily, and water can be supplied in time when it is dry, and the pool water can be replaced at ordinary times. Frog farms should be close to farmhouses for easy management.
The soil of the frog farm must belong to clay for hydroponics. You should choose a place with frequent sunshine to raise the water temperature. There should also be enough food, such as a large number of natural bait such as insects and plankton, to ensure the growth of frogs and tadpoles.
(2) Water quality requirements of bullfrog farms
Bullfrogs have certain requirements for the water quality of their lives, so the quality of water quality has a great relationship with the success or failure of bullfrog breeding. Water quality includes oxygen content, temperature, pH value, minerals and microorganisms. Generally, the minerals and pH value of clear water have little effect on bullfrog, but oxygen content, temperature and microorganisms directly or indirectly affect the survival and life of bullfrog and tadpole. Therefore, the quality of water supply should be considered first in breeding bullfrogs.
1. Water quality conditions of cultured bullfrog
Dissolved oxygen: Animals on land live by breathing oxygen in the air, while bullfrogs live in water and live by dissolved oxygen in water. Generally speaking, the bullfrog's requirement for dissolved oxygen is above 0.4 mg/L. If the dissolved oxygen in the water is too low, the bullfrog will float its head and suffocate when it is seriously deprived of oxygen. Due to various external factors, dissolved oxygen in water changes from time to time. Generally, 1 hour is the lowest before sunrise in summer, and 1 hour is the highest from 2 pm to sunset in winter. Dissolved oxygen in water is related to the number of animals and plants in water, the decomposition of humus, the level of water temperature, the degree of sunlight exposure, the change of air pressure, the humidity of air and the size of the contact surface between water surface and air. PH value: pH value is pH value. Generally speaking, bullfrog can survive in the range of pH 5.5 to 9.5, but the optimum range is pH 7.5 to 8.5. Too high or too low pH value in the bullfrog pool will hinder the bullfrog's breathing and blood circulation, leading to weakened activity, decreased appetite, darkened color, and even stopped growing or even died in severe cases.
Transparency: Transparency is the degree of light penetrating into water, a range of water visibility, the most intuitive indicator of water environmental quality and water quality, and an important indicator of aquaculture water use. Transparency is directly related to the color of water, which in turn indicates the degree of fatness of water and the number of plankton in water. The most suitable water transparency for fish culture is 25 ~ 30cm. When the transparency is less than 25cm, it means that the water quality is too fat, the organic matter is too much, the light ability is reduced, the dissolved oxygen is reduced, and it is easy to breed a variety of harmful bacteria, which reduces the digestive ability of fish to feed and weakens the disease resistance. Transparency is
Above 60cra, it shows that the water quality is too thin, there are too few high-quality natural bait for fish, and the fat fish such as silver carp and bighead carp grow slowly and their disease resistance is reduced due to lack of bait. The weather is cold in early spring, the water temperature is relatively low, and the transparency can be controlled at 30cm.
Yes, in order to enhance the light intensity of water body, it is beneficial to improve the water temperature in the pond, advance the feeding time of fish and prolong the growth period; From May to September, as the season goes on, the temperature gradually rises, the water in the pond gradually deepens, the amount of fertilization and feeding is large, and the transparency is controlled at about 25cm, which can keep a large number of plankton with good quality appearing and dissolving alternately.
Oxygen.
Salinity: Salinity affects oxygen consumption rate and osmotic pressure of bullfrog. With the increase of salinity, the oxygen consumption rate of bullfrog increased, and the growth rate decreased. At the same time, bullfrog lost water. Generally, the salinity of water raised by bullfrog is not higher than 0.2%.
Where is the bullfrog suitable for breeding? Bullfrogs can be raised anywhere, but you have to look at the local water temperature and season. The water temperature should be 20 degrees Celsius.
Are scorpions suitable for breeding in plateau areas? I think if you keep it as a pet, as long as the owner takes good care of it, you will definitely keep it. If you want to raise, you should also pay more attention to temperature and humidity, and try to meet the living environment of scorpions. Actually, it's mainly about yourself. If you have the heart to raise it, you can raise it. If there is no intention of management, everything that is good to feed can be raised to death.
If you want to keep scorpions, you can get to know them first. I believe it will be more beneficial for you to raise scorpions on the basis of understanding. :baike . Baidu ./view/435 19 . htm
Business, what should I pay attention to in bullfrog breeding? It is necessary to have the site, water source, capital and technology suitable for bullfrog breeding, and at the same time, it is necessary to have the relevant breeding license issued by the * * * department, as well as the provenance certificate and relevant quarantine certificate for bullfrog breeding. At present, there are three breeding methods of Rana chensinensis in China: greenhouse breeding, outdoor farm breeding and field furrow sealing stocking. But the economic benefit of greenhouse cultivation is more obvious.
China Rana chensinensis mainly feeds on insects, while the living food of China Rana chensinensis cultured in greenhouse is mainly Tenebrio molitor, maggots and earthworms. Except for feeding Tenebrio molitor with bran, the other two kinds of bait can be fed with livestock manure or non-toxic organic garbage, which greatly reduces the breeding cost. Therefore, it can be said that forest frog breeding is a new industry with small capital and quick results.
The solar greenhouse investment is 6,543,800 yuan (400 square meters). Two rooms for breeding Tenebrio molitor, plus the feed cost of 5,000 yuan, can raise 8,000-65,438+10,000 young frogs, and about 20,000 female frogs can be released that year. According to the lowest market price of 5.00 yuan per frog, the output value can reach more than 654.38+10,000 yuan, which not only can recover the investment in that year, but also has a high economic return.
Bullfrog is native to North America and is the largest species of edible frog. Bullfrog grows fast, with delicious meat, rich nutrition and high protein content. Foreign bullfrogs include American bullfrog, swamp green bullfrog, spring bullfrog, African bullfrog, African bullfrog and so on. The individual weight of bullfrog can reach more than 1 kg. Bullfrogs like high temperature and damp shade, and live in the grass near the edge of the pond. They especially like to live in the semi-dry and semi-wet soil hole formed by water waves near the pond pit. Often the lower body is immersed in water, the head is exposed to the water, and the head is outward. The cry of a bullfrog is similar to that of a cow. When you hear the croak of the bullfrog, you can predict that the spawning period is coming, and then stop chirping after the spawning period.
Breeding of Bullfrogs and Breeding of Young Frogs (I) Breeding of Bullfrogs Bullfrogs begin to lay eggs from May to July. The optimum water temperature for spawning is 24-28℃, and the spawning time is 65,438+00-30 minutes. The amount of eggs laid varies with the individual size of the female frog bag, and generally thousands to 50 thousand eggs are laid. Eggs should be fished out 30 minutes after spawning. When fishing eggs, people should stand in the water, cut off all weeds around and below the eggs with scissors, and transport the eggs to the incubator with an egg picker to hatch. Incubation pond requires water depth of 50-60 cm and area of 1.2-2 m2, and it is suitable for incubating 6000 eggs per m2. For breeding eggs, the water temperature should be 20-30℃ and the pH value of water should be 7-7.5; The content of heavy metal ions shall not exceed the drinking water standard. Don't disturb the water body during incubation. Irrigation should prevent excessive flow and height, and shade shed should be built on the pool to prevent sun and rain.
2) Cultivation of tadpoles The newly hatched bullfrog tadpoles have poor swimming ability, and they have to be kept in the incubation tank for about ten days before they can be transferred to the tadpole pool. Tadpole ponds need to be cleaned and disinfected for 5-7 days before tadpoles can be put in. The pond should not be too big, 30-36 square meters is appropriate, and the minimum can be 6-8 square meters, and the water depth is 0.6- 1.2 meters. The suitable water temperature for tadpoles is 26-30℃. In order to keep the high temperature, it is necessary to build a shed, deepen the water level appropriately and change the water frequently. Tadpoles newly hatched 1000-2000 days are stocked per square meter, those hatched 10-20 days are stocked at 500- 1000 per square meter, and after 30 days, they are stocked at 100- 130 per square meter. Tadpoles began to eat unicellular algae after hatching for 4- 15 days. Later, all kinds of animal feed, such as snail meat, fish, animal offal, dead fish and so on. , can be added appropriately, and some rice bran, corn flour, bean cake, wheat bran, porridge and so on. You can add. Feeding amount: 40-70g of bait is fed daily within 7-30 days, and animal bait accounts for 60%; After 30 days of metamorphosis, every 100 tadpoles were fed with 40-80 grams of bait, and animal bait accounted for 47%. Once a day, 4-5 pm.
The breeding ground of commercial frogs should be in a cool place with sufficient water, no drought, no flood, wet, warm and sunny places and overgrown areas. Determine the area according to the number of aquaculture, and keep the water depth at 1- 1.2m in winter. The frog pond should be surrounded by reed curtain, bamboo fence or barbed wire, nylon net and brick wall. The fence should be buried at the height of 15-20cm and 1.5m to prevent the bullfrog from escaping. Ponds should be planted with lotus roots and other leafy emergent plants, and aquatic plants such as water peanuts and water lilies can also be planted. There should be a gentle slope of 1-2 meters between the water surface and the fence, and a frog hole should be built for frogs. Clay mud balls or bricks can be used as the skeleton, and a layer of mud should be coated inside and outside to avoid scratching the frog skin. The frog cave is parallel to the bottom of the pond, with a depth of 50-70cm, a width of 15-20cm and a height of 10- 15cm. There should be 2-5 cm of water in the hole. Frogs only eat live bait and need artificial supplementation. The methods are: 1, light trapping. It is best to use a 30-watt ultraviolet light or a 40-watt black light. When you turn on the lights in the dark, you can see the lively scene of bullfrogs jumping and devouring insects under the cluster lights. 2. Supplement small fish and shrimp. The first method is to dig a shallow pit near the frog pond and put in small fish and shrimp to supplement the lack of bait; Secondly, the trough bait tray made of wood and bamboo is nailed with nylon emery cloth at the bottom, and the water in the tray is connected with the pool water, fixed in the shade of the frog pond, and put in live fish and shrimp. When the weather turns cold and insects are scarce, this method is effective. 3. Insects such as locusts, mantis and mole cricket. After artificial capture, put it into the weeds in the frog pond and let the frogs feed naturally.
Prevention and treatment of frog diseases;
Red leg disease 1, symptoms: the frog moves slowly and its appetite decreases. The diseased frog has some subcutaneous bleeding on the abdomen and inner thigh. When the condition is serious, the leg muscles are obviously congested. Often complicated with diseases such as "gastroenteritis". 2. Etiology: Deterioration of water quality and high stocking density are important conditions to induce the disease. The main pathogens are Aeromonas hydrophila and Acinetobacter. 3. Harm: The disease has a long course and can occur all year round. The main onset season is from May to 65438+ 10. The incidence rate in coastal areas such as Ningbo is relatively high. If it is dry wintering, it will also happen during wintering. The incidence of red leg disease is generally 20-30%, and the mortality rate is between 20-50%, and the highest can reach more than 80%. 4, prevention and control methods
Is Guangxi suitable for bullfrog breeding? Frog farming needs a warm and humid environment. Geographically, the whole of Guangxi is suitable for breeding bullfrogs, but if subdivided, the annual average humidity in Hechi area is not as good as that in Yulin area. But if you can ensure that the relative humidity of the farm environment is above 90, Hechi can be farmed.
The prospect of bullfrog breeding, the profit of bullfrog breeding is as high as it is. Bullfrog has been recognized by the world. At present, the business market is relatively good, the price is not expensive and the benefits are considerable. Apart from the cost, it should not be a problem for bullfrogs to earn 5000 to 7000 a year.
What do you need to do to breed bullfrogs? You don't need a big one, you need a small one.
Bullfrog breeding QQ group, exchange bullfrog breeding technology, bullfrog breeding and seedling breeding experience. The largest bullfrog breeding group in China;
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Whether the southwest region is suitable for breeding bullfrogs is ok, but it seems that there are a lot of bullfrogs now.
Farming is mainly about considering good sales.
American bullfrog seedlings, bullfrog tadpoles and bullfrog breeding Guangdong Chenghai Chaoqun bullfrog farm