Chinese forest frog breeding technology

1. The industrial significance of Rana sylvatica in China, Rana chensinensis is a frog species that combines medicinal use, food, and health care. It is also known as “the four treasures”, Hericium erinaceus, bear's paw, and dragon, and the national second class protected animal. To be used as a medicine, in particular, the eucalyptus oil made from the female fallopian tube is a precious Chinese medicinal material. It has a remarkable effect on consumptive diseases such as hepatitis and tuberculosis. It can improve the body's immunity, enhance physical fitness, beauty, anti-aging, etc. effect. At present, the Rana sylvatica rearing culture has just emerged, and the deep processing of Rana sylvatica on the market is just like the development of fire-like tea. However, the output of Chinese Rana sylvatica is very low, resulting in domestic sales price of eucalyptus and earthworms of 1800/kg, and the international market price of 1,500 USD. Kilograms are the pillar industries of the country's foreign exchange earnings. 2. The advantage of Chinese Rana sylvatica breeding in the South; Southern China has mild wet climate, especially suitable for Rana sylvatica growth and reproduction, and its main performance is three; 1. Southern air temperature is large and favorable for frogs' survival; 2. Southern China has long frost-free period, which provides a comparative advantage for frogs. Long feeding periods and growing seasons; 3. Southern bugs can provide abundant food for frogs. The annual frogs in the South have a body weight equivalent to twice the body weight in the North. III. The culture mode of Chinese Rana sylvatica; it can be intensively bred separately or mixed with other plants, but it must meet four points; shading, insulation, anti-escape natural enemies and sufficient food. There are three modes; (1) intensive culture; available simple rooms, steel racks or sheds, shade nets on top, anti-escape nets on all sides, vegetation in sheds, rubble, shading for hiding, black light traps installed, Irrigation and drainage system outside the shed; (b) polyculture; use of shades in vineyards, orchards, tea gardens, nurseries, etc., to prevent escape and natural enemies, irrigation drainage facilities, and installation of black light to attract insects; (c) to put snow on Shady special plants (such as aloe vera) are mixed with Rana sylvatica. IV. Selection and construction of breeding sites; (1) Site selection. Consider water quality, soil, vegetation, terrain and traffic. Requires good water supply, water salinity at the end of 3%, pH between 6.5 and 7, aquaculture water pollution, as far away as possible from the urban living area, the soil water retention requirements of the farm site; frog likes to hide inside the cave, the site to the soil Try to loosen, preferably sandy loam soil, or lay a thick layer of leaves on the field. For example, natural vegetation is less artificially loaded with some of the wet plants to meet their needs. (b) Construction of aquaculture sites. The structure of the site should be reasonable, save resources and reduce costs. There must be a drainage channel, aquaculture pond, adult frog breeding pond, bait grain breeding room and duty room. Into the drainage system, arrange the inlet line, the water is generally deep 50cm, width 30cm, can also be digging on the ground with bricks. The Dianchi Lake is 0.5cm deep, and the area is generally a pair of frogs requiring 5m2 of water. The wall of the pool may have a certain slope, and be left in the water outlet. There should be shelter facilities on the pool, such as a simple shed. Overwintering pool, usually a concrete pool, one meter deep, 10 square meters of pool wall to be smooth, to stay in the outlet, bait farming room for farming yellow mealworm etc., generally two to three rooms, each about 20mz . V. Rana breeding management; (a) winter management. The outside temperature dropped to 10. Below C, Rana sylvan is no longer feeding, followed by hibernation. There are two ways to hibernate; one is to hibernate directly on land, and the other is the winter in water. The land is hibernating on the ground. The fields should be covered with dry grass and rubble. The frogs can drill into the winter. The frog farm should often drink, disinfect, and be quiet. Do not disturb. This wintering method is safer. (b) Rana's hugs spawn the following spring. At the end of March and early April, the temperature dropped to around 10 degrees, and recovery and buzzing occurred. At this time, Rana sylvatica should be taken out of the wintering pool, and the ratio of males and females should be set at 1;1. It should be placed in the spawning pond for spawning, and the water depth of the spawning pool should be maintained. 12 to 20 centimeters or so, the density is 30 pairs/m, hidden objects must be set in the spawning pool, and the bottom of the tank should be loaded with no sludge. Spawning periods are around 4-15am and do not lay eggs during the day. (c) Egg egging. After the frog eggs are produced, they absorb water and swell. After 2 to 3 hours, they can be removed and placed in the egg pool. Eggs that are not produced in the same place cannot be placed in the same pool. Egg group can not be removed too early, otherwise it will affect the fertilization rate. The egg pool requires planting pollution, adequate dissolved oxygen, clean sludge, no sludge, and the depth of egg pool is about 20cm. During the day, the appropriate bottoming water level will help the water temperature rise and shorten the egg time. At the later stage of oocyte maturation, the carp has basically formed and cannot be moved or transported. Otherwise, early out of the film, the output is deformed, affecting the survival rate. (d) Feeding management of clams. After 5 days of oviposition, the eggs will come out of the egg membrane and they do not need to be fed. One week after the film began to feed artificial diet, began to splash liquor soy milk, egg yolk pulp as well, and gradually fed corn flour, skin, vegetables, fish meal, pig lung and so on. In the early period, plant-based feeds were mainly used, supplemented by animal feed, and later in the later period. The density of feed is preferably 1000 in the early stage, and the feed is divided into pools according to the size. It is advisable to feed it once a day in the early stage, with a slight surplus in the pool. Feeding twice a day at a later time, the amount is also slightly surplus in the pool. The quality of the protein in the feed should be gradually increased. From the beginning of the feeding, the water should be frequently changed, and regular disinfection should be performed. After 30 days or so, it began to grow into the metamorphosis of the hind legs and grow forelimbs later. Become a frog to live on land. (5) Breeding management of young frogs. The newly metamorphosed young frog does not feed on food. The young frog's tail completely absorbs it and starts feeding on a 2-3 month old yellow mealworm or a 1-2 day old wolfberry. In the evening and once in the evening, it is advisable to have a feeding amount to make a surplus in the field. After the young frog enters the pool, drinks should be served in time every day. The site must keep the soil moist and not have too much water. Between the time of drinking and feeding time is about 2 hours apart. Overcast, rainy days, little or no water, the site should be regularly sterilized, and the bait should be diversified. Patrol the pool every day. The main enemy is birds, rats, snakes and so on. (6) The breeding management of adult frogs is the same as that of young frogs. I have long-term supply Rana frogs each pair of $ 20 for mailing: Hubei Macheng City of Montrose Fisheries Research Institute: Following more than l article published in the "rich fishery Guide" 2003 2

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