How to breed Chinese Rana in the South
The Chinese Rana sylvatica is commonly known as Hu Shichao, and it is the main animal in the north of Guangdong Province. It is a state-level second-level protected animal. It is a famous medicinal economic frog species in China. The frog oil made from the frog's fallopian tube is a precious Chinese medicinal material and has a lung and nourishing yin. , Bushenyijing, brain puzzle and other effects. The natural resources of China's Rana sylvatica become increasingly depleted with the development of the market economy. In recent years, artificial breeding of Rana sylvatica has begun to take shape in the northeast of its main producing area, and it is developing in the direction of industrialization and intensification. In the 1950s, Zhao Zhenlu of Shanghai Fisheries University proposed the concept of Chinese forest frog breeding in the South. Many people have done a lot of basic research work in this area for many years. Based on previous work, in recent years, the College of Fisheries of Soochow University has been funded by the Science and Technology Committee of Suzhou City, and the experiment of southern migration of Chinese Rana sylvatica has been carried out in the suburbs of Suzhou. 1, winter. Hibernation is a physiological reaction of Chinese wood frogs avoiding bad weather conditions. Chinese Rana can hibernate in water or hibernate on land. The depth of winter should be above 1.5m, and the water level should be kept at around lm. The density of Chinese Rana sylvatica in wintering ponds is preferably about 300 pairs per square meter. The land overwintering site is to be protected from light, sheltered from wind, and relatively humid place. First, a layer of rubble is laid on the surface of the ground, and then a layer of leaves or straw is laid on the rubble. The Chinese Rana sylvatica drills into the rubble under the leaves or straw to hibernate. During the winter, you should regularly spray water on the site, and at the same time strengthen the prevention of natural enemies and regular disinfection. 2, hold to spawn. When the water temperature rises to about 10°C in early March, the species of frogs is moved from the wintering pond into the spawning pond. The density of the breeding frogs is 30 pairs per square meter. The spawning pond should be built in a place where there is sufficient sunlight and convenient drainage and irrigation. The depth of the spawning pool should be 1.2m or more, and the water level in the pool should not exceed 25cm. There should be a slope on one side of the pool, with a slope below 45 degrees, so that the Chinese forest frogs can rest after spawning. A 1.5m high fence is built around the spawning pool. 3, hatching. The hatchery should be built in a place sheltered from wind and shading and sheltering facilities. The water level in the hatching pool should be kept at about 80cm. The water level in the hatching pool should be kept stable. The walls and bottom of the pool should be sealed with cement or plastic film. The pool should be kept clean and free from any pollution, otherwise it will affect the hatching rate of Chinese Rana sylvatica. . The density is 4 eggs per square meter. Egg hatching is closely related to temperature. In early March, the water temperature in the southern part is generally around 13°C. Fertilized eggs can hatch out in 4-5 days. 4, alfalfa breeding and metamorphosis. The depth of the rearing pond can depend on the specific conditions, from 20cm to 120cm. But the water retention of the pool is better, and the pool that is seriously leaking can never be used. The key to the success of quail feeding depends on four factors: water quality, water temperature, food, and density. Under normal circumstances, the water should be changed every 4-5 days. The newly hatched quail mainly eats the egg glue film. In the first ten days, only a small amount of soybean milk can be fed, and gradually the cooked pork lung, corn flour, and greens are gradually fed. During the period of metamorphosis, we stopped feeding. At this time, the abnormal frog's tail has not been fully absorbed. It is often active at the water's edge. When frightened, it enters the water. Since the Chinese Rana sylvatica activity is not flexible at this time, it must be strengthened against natural enemies. defense. 5, young frog breeding. China's forest frog breeding must meet the following basic conditions: 1. The breeding site should be equipped with shading facilities to avoid direct sunlight to the Chinese forest frogs; 2. Water spray facilities should be provided to maintain the site humidity and provide a relative humidity for the Chinese forest frogs. The environment, 3, to have anti-escape and anti-predator facilities, beware of Chinese Rana escaping and natural enemies; 4, to provide adequate food for the Chinese forest frog. The breeding of young frogs can be carried out in plastic greenhouses, or can be carried out in simple rooms, and can also be carried out in cement ponds with shaded and sheltered facilities outdoors. The breeding density is generally 300 frogs per square meter. Young frog breeding bait should have the following characteristics: l, bait should be able to be active, can be found by Chinese Rana; 2, the individual food can not be too large, especially the bait for young frog breeding, on the one hand to be small, the other On the one hand, it should be soft; 3. The cost of bait should be low, and it should be more convenient to obtain; 4. The variety of bait should be changed and it cannot be fed to the Chinese forest frog for a long time. According to the changes of seasonal temperature and the physiological characteristics of Chinese Rana sylvatica during various developmental stages, Tenebrio is generally used as the main bait in May, June and October. In July, August and September, the fly maggot is generally selected as the main bait. Feed the bait once.