The coypu is a semi-aquatic, herbivorous rodent. When it is wild, it often inhabits streams, lakes, rivers, and swamps that are not frozen all year round, and are rich in grass. They are good at swimming. Living in caves that are 3 to 5 meters long and 1 to 2 meters deep, or nests made of water and grass, there are no holes in the caves, and the nests are like burial mounds. There are many vegetation around the holes and nests as cover.
The coypu has a weak vision, is sensitive to light and likes nocturnal activities. Sensitive to hearing, it can perceive the subtle sounds around the environment, especially when there are natural enemies. Every year, the hair is changed once and there is no obvious hair change every year. The hair change is obvious from March to May and from August to September.
The coypu is more clumsy on land, is comfortable in water activities, and is good at diving and swimming. Its life span can be 8 to 9 years. The natural enemies are mainly carnivores and raptors.
The coypu is a cultured species with high economic value. The main products are fur, meat, fat and tail reinforcements. Coypu fur coat is thick, soft, wear-resistant and tightly velvety. The heat preservation and waterproof performance is similar to that of water fur, and its appearance is gorgeous. With its fur, it can be made into all kinds of high-grade fur clothing, which is welcomed by consumers at home and abroad. Coypu meat is called Hailong Meat in the international market. It is high in protein, low in fat, and has a high hemoglobin content. According to the National Meat Quality Supervision and Inspection Center and Beijing Institute of Nutrition Research, the crude protein content is 25%, contains 18 kinds of amino acids, and contains more than 30 trace elements such as zinc, calcium and selenium. Fatty fats account for 96% of unsaturated fats, and linoleic acid is also high. It has the effects of softening blood vessels, beauty, and cholesterol breakdown. Coypu oil can be made into advanced cosmetics. Coypu bone made from medicinal wine, can be used to treat rheumatism, cold leg disease, has a significant effect on the recovery of fractures. Coypu tail medicine has nourishing yin and yang effect. The coypu tendon has been scientifically processed into surgical sutures for suturing the wounds, which is beneficial to wound cell regeneration and tissue repair, and can promote wound healing without removing stitches. With the deep processing of the coypu product, some high value-added products have been developed.
The coypu is a herbivorous fur beast. The basic food is plant-based feed. It is easy to solve, has a gentle temperament, is easy to raise, and has a fast breeding speed and a high economic value. It has broad prospects.
Sites for artificial breeding of the coypu should be selected for high ground, leeward sunny, dry site, drainage and irrigation facilities, and require sandy soil, there is a certain shade and secluded areas around. In order to avoid the mutual infection of immune diseases, the coypu farm should be kept away from the livestock farm (usually 500-1000 meters). At the same time, transportation and power conditions must also be considered. North winter cold regions should also consider the issue of warming and heating in winter. The coypu is a herbivore dominated by green feed. The site should be built in a place where there is a wide range of feed sources, or where it can be solved or purchased. Each pair of nutria, including one-year-old cubs, needs 200-250 kg of green feed (including weeds, wild herbs) and about 40-50 kg of grain feed.
The majority of farmed coypu is currently reared in cages or cages. Captive farming, though applicable and economical, covers a large area and the pool in winter is susceptible to freezing. Cage raising is suitable for indoor use, and the rearing density is higher than that of breeding. The shed can be built into a simple building with a slope. General use of angle steel or wood, bamboo, etc. made of pillars, covered with asbestos tiles, linoleum paper or ramie grass cover. The shed is 1.2-1 meters high, 23.5 meters long and 3.5 meters wide. Cement floors and cement walls are generally used on the ground and around to prevent coypu from making holes. Leave a one-meter wide passage in the shed, and open a hole in the shed to connect the small room and the fence. The base of the fence is 180 centimeters long, 75 centimeters wide, 40 centimeters wide and 70 centimeters high. The entire fence encloses a square platform with a narrow width and a narrow width. The mesh should be less than 3 centimeters and 3 centimeters. On a metal stand, 60 male and 50 female mice can be raised. There are also vegetable kiln or plastic sheds for feeding in winter. The top floor of the nest is covered with a wire mesh of 2.5 cm or 2.5 cm mesh or an asbestos board, which requires the chamber to be dry, warm, and airproof. The adult can be kept in a single cage, and the barracks are composed of two parts: a small room and a fence.
The basic food of the coypu is plant-based feed, especially the succulent grasses and aquatic plants. It can be fed according to the nutritional needs of different periods. Grass species include a variety of wild grasses, reeds, aquatic plants, alfalfa, and crop young crops. The dishes include various vegetables, Chinese cabbage, carrots, beets, potatoes, sweet potatoes and so on. The branches consist of twigs of banyan, willow, mulberry, and apple trees; fresh, larger branches allow them to grind their teeth and eat their bark. Cereals include various food and grain by-products such as corn, soybeans, wheat bran, rice bran, peanut cakes, and bean cakes. Animal feed is a kind of feed with the highest nutritional value. It has a great effect on the reproduction, lactation and growth of nutria. Animal feed non-ferrous, fish meal, silkworm cocoon powder, egg yolk powder, milk, goat milk, condensed milk, milk boat, cod liver oil, etc. In order to ensure the health of the coypu and obtain high-quality fur, 5%-7% animal feed should be added to the diet. If it exceeds 10%, the coypu would not love to eat. The Additions Section supplements nutrients, vitamins, antibiotics, minerals or trace elements that are either lacking or insufficient in the general nutria diet. When feeding, the finished product of livestock trace mineral supplements is generally used and evenly mixed in the concentrate feed. The temperature of the ingredients should not exceed 50°C. After the general grain feed is mixed with the added feed, it is made into pelleted feed or steamed into the follicle-nose head. Other feeds are washed and fed. Potatoes can also be cooked and can replace part of the feed.
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