Mink and its artificial breeding

Mink and its artificial breeding

Modern medical research proves that leech contains an important substance called hirudin. Because of the special effects of anti-thrombotic drugs, the drugs processed with leeches have been used by the world medical community as the drug of choice for anticoagulation and antithrombotic therapy. However, due to the extensive use of pesticides in recent years, the growth environment of leeches has been severely damaged, resulting in the rapid reduction of wild leeches resources. In order to meet the needs of the pharmaceutical market, artificial breeding of mink has become a promising breeding program. Now I will introduce the relevant common sense of Minamata and the key points that need to be grasped in artificial breeding.

First, relevant knowledge of Minamata

Minamata is a valuable Chinese herbal medicine. China is one of the earliest countries in the world to use the medicinal properties of mink, and it is recorded in such medical works as "Compendium of Materia Medica", "The Classics", and "Shen Nong's Herbal Classic". Hydroquinone has special effects on various kinds of diseases such as heartache, heart failure, hypertension, cerebral thrombosis, bruises, and tumors.

Leeches are commonly known as grasshoppers, horses, and horses. The biological classification belongs to the phylum of the phyla and the skeleton, with no bristles on the surface, suckers on both the front and the back, and a small body cavity, but the body muscles are developed, and it is a highly specialised annelid. Hydra and hermaphrodites, each otter can spawn, generally one otter can spawn 6 to 10 eggs, each oviposition can breed 80 - 100 young otter, after 6 months to 9 months Mature and mature. At present, there are about 500 species of leech in the world, nearly 100 species in China, and three species that can be used as medicines, namely, Japanese doctor's orders, tapering gold lines, and wide-body gold lines (also known as money puppets). Because money is often crawled to the cattle to suck blood, the rural area is commonly called cattle grasshoppers. It is flat, fat, and spindle-shaped, measuring 6 cm to 13 cm in length and 1.2 cm to 2.2 cm in width. Its back is usually dark green with five black or yellowish lines. The leeches are characterized by strong vitality and rapid reproduction. It is an excellent breed for artificial feeding.

Second, the four key links need to be grasped in the artificial breeding of otter.

1. Improving water quality Water is a necessary condition for the survival of water otters, and the quality of water will directly affect the growth and reproduction of otters. Due to the limited area of ​​artificial breeding and the high density of cultivation, the water in the pool must be clean. Especially in the hot summer, the water temperature is high and it is easy to degenerate. It must be replaced regularly, and the pollution of acid-base substances and fertilizers and pesticides must be prevented. In order to increase the oxygen content in the water, some aquatic plants and other aquatic plants can be planted in the water. At the same time, an aerator should be configured to ensure the oxygen demand of the otters. Only the pool water is clean, the oxygen content is sufficient, the water is rich in microorganisms, there is plenty of organic matter, and the aquatic plants are lush. The cultivation of leeches can be successful.

2. Maintaining the optimum temperature When the water temperature is below 10°C, the leeches stop feeding and hibernate into the soil. At temperatures above 30°C, the blister stops growing. Under natural conditions, otters reproduce twice a year, and spring and autumn are breeding seasons. In order to improve the breeding efficiency, shorten the feeding cycle, and accelerate the growth and reproduction of leeches, the water temperature must be kept between 15°C and 30°C for a long time. From late September to April of the following year, the temperature is below 15°C. This time should be artificially heated. When the temperature is higher than 30°C in the summer, it can be cooled by watering, sunshading, or exhaust. Of course, installing an automatic temperature control device works better. It can change the state of hibernation in hibernation, increase the number of leeches breeding, and increase production.

3. To ensure that the food nutrition water has a wide range of feeding habits. In the natural environment, it mainly feeds aquatic plants, water microorganisms and organic matter. Artificial breeding, in addition to ensuring the natural conditions of food supply in the natural environment, snails, sterile fly maggots, cockroaches, snails, grass powder is also a high quality feed for mink. Hydra also eats animal blood clots. Feeding method: Place blood clots and other foods on floating objects in the water and place them every 5 meters or so. Let the mink feed freely and feed once a week. The feeding time is usually in the evening and the summer is 8-9. In winter, it is from 6 to 7; the food intake is calculated at 0.02 kilograms each, and the remaining food and blood clots are cleaned early in the morning to reduce the pollution to the water quality. Blood clots should be fed regularly, quantitatively and fixedly.

4. Choosing the right environment The otters like to live in paddy fields, ditches, lakes, rocks and under rocks. They also like to live in places where aquatic plants can hide. In addition to simulating the natural environment, the artificial breeding should also be selected in a place where there is no pollution, away from noise, leewardness, sunny, and irrigation and drainage. The area should be appropriate, and it is generally advisable to raise 1,000 to 5,000 trees per square meter. The depth of the pool is 1m to 1.5m, and the water depth is 0.6m to 0.8m. The bottom layer of the pool is first covered with a layer of 10cm thick pure soil. Put some stones on the soil layer and plant aquatic plants to supply water. Resting and growing, 80 cm high protective nets are set around the pool to prevent natural enemies such as rodents and frogs from invading, ensuring the spawning, hatching and life safety of the otters.

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