Under natural conditions, due to the late maturation and low reproduction rate, coupled with the historical changes in geological features, the ecological environment of Otsuka has been severely damaged, and its wild resources have become increasingly depleted. The Chinese government has listed Otsuka as the second country in 1989. Animals are protected. Therefore, the artificial breeding of large cockroaches can not only protect the resources of multiplication giant cockroaches, but also satisfy the needs of domestic consumers and earn foreign exchange through exports.
In recent years, the results of domestication tests have shown that Daphnia can adapt to the artificial ecological environment relatively quickly, and under the conditions of sufficient feed, it has the remarkable feature of rapid growth. The following is a summary of the technology for strengthening fast-breeding in Daxie pool:
1. The construction of a large breeding pond in Dianchi Lake is to be built in a quiet, cool, well-watered and well-watered area, and the water temperature is required to be in the range of 10°C to 25°C all year round. If conditions are available, it is best to equip the facilities for heating in winter and cooling in summer, which will improve the feeding effect.
1. Juvenile ponds are mostly made of cement structure. Each pond area is suitable for 8 to 10 square meters, with a wall height of 50 to 60 centimeters and a water depth of about 20 centimeters. The bottom of the pool should be covered with a layer of silt. The wall of the pool is required to be smooth. Stone pools, rockeries, and islands are set in the pool. The pool is equipped with anti-skipping boards to allow the young cubs to climb onto the land to prevent escape.
2. Chengyu Pond uses cement structure, each pond area is suitable for 50m2 ~ 70m2, pool wall height is 1.2m ~ 1.3m, pool shape is rectangular, and inlet and outlet are provided, water depth is kept at 30 Centimeters or so. The nest is built around the bottom of the tank or in the middle. Bricks and cement boards can be used as materials. The nest is built into a rectangular box shape with a height of 15 cm to 20 cm, a depth of about 50 cm, and a width of 30 cm to 40 cm. Under artificial rearing conditions, big quails often occupies a single hole, so the visual width of the hole width can be increased accordingly. The inner wall of the den needs to be smoothed with cement mortar to make it smooth to avoid scratching the trunk. In the center of the pool, there can be a resident's desk where big gongs can move. The surface of the pool should be scaffolded or planted on the shore of the pool, and shaded with melon beans to prevent the heat from damaging the sun.
Second, the appropriate stocking density of seed stocks is beneficial to the growth of large cockroaches and to lower the bait coefficient. Production practice has shown that 25 to 30 pigs can be stocked per square meter of water, with 10 to 15 tails of 500 to 1000 grams per tail. The stocking specifications should be neat, so as not to cause strong meats due to differences in individual size. The newly built cement pool must be soaked in water for 15 days to 20 days until the pH of the pool water is stable below 8 to release the stock. One week before stocking, new and old pools should be disinfected with bleach or other drugs to kill the enemy. The seedlings were soaked in water for 5 minutes with 0.2 g furan or 0.5 g blue.
Third, the bait is fed to the larvae during the start of the feeding period, mainly feeding live larvae such as chironomid larvae and leeches to eat enough food. After feeding for 15 days, some shrimps, clams, minced meat, etc. can be properly fed for feeding at night. After feeding for 8 months or so, when the larvae weigh more than 20 grams, the bait can be eaten with small miscellaneous fish meat or chopped beef, mutton, etc. It can also be fed artificially with bait. With the use of fish meal and α-starch as main raw materials, artificial diets with a crude protein content of 42.3% to 45.6% were used to feed young calves, and their growth rate was 33.3% faster than that of fresh live bait.
Adult pupa fish can be fed with fresh low-value fish or artificial diet (Reference formula: fish meal 55%, dried cake 8%, wheat bran 5%, silkworm cocoon 5%, bone meal 1.2%, α-starch 17.3%, premix 8.5%). If live fish are used, bait fish should be cut into pieces for feeding. Artificially formulated feeds are generally powdered and can be adjusted to soft mass before use. Fresh animal viscera can also be used as a bait after boiled in boiling water, but the nutritional value is not as good as fresh fish and artificial diet. The daily feeding rate of fresh live bait is 10% to 15%, and artificial feed is about 10%. The bait is generally cast in water and is usually baited before and after darkness in the evening. In the optimum temperature range, Chengyu consumed the most food within 3 hours after dark and when the weather was hot, the food intake decreased significantly and even stopped feeding. Therefore, the specific feeding time and feeding amount should be flexibly controlled according to the weather, water temperature, water quality, and the activity of the adult.
Fourth, the daily management of large-scale special pools to strengthen the rapid raising, high stocking density, water quality is difficult to balance. Therefore, the larvae pool should be changed once a day with fresh water, and the remaining residues in the pool should be removed so that the transparency of the pool water is at a glance and the pH is maintained at 6.5-8.5. Chengyu Pond generally changes water once every two days to three days, and changes water once a week in winter. The specific number of water changes should be based on the level of temperature and water quality, in order to maintain the quality of fresh water. Always check the feeding ponds to prevent them from escaping. Regardless of cubs and pupas, after entering the pool, records of temperature, water temperature, feeding species, feeding amount, eating conditions, growth conditions, and activities should be recorded every day in order to sum up accumulated experience and further raise the maggots.
V. Disease prevention and treatment The bully is stronger in resistance and generally has no disease. However, in the special pools to enhance fast-breeding, high density, high feeding, and rapid growth, the prevention and treatment of bullous diseases should be strengthened. During the breeding process, the fish is periodically splashed with 0.710-6 cupric sulfate and ferrous sulfate mixture (ratio 5:2) once a month to kill pathogens and parasites. If skin ulcers or bites have occurred in large cockroaches, they should be immediately quarantined for isolation and treatment. Penicillin can be injected at 50,000 IU/kg once daily for 4 consecutive days and then once every 4 days for 2 consecutive times. 3 times can be cured.
China's large-scale special pool to strengthen the technology
Otsuka commonly known as giant salamanders, also known as squid, dogfish and tetrapods, is a unique large-scale amphibious aquatic animal in China. It is tender, delicious and nutritious. It is a strong nourishing food for feasting and maternity, young and old, and weak. Its meat and skin are used as medicine to treat anemia, neurasthenia, hepatogastricgia, joint pain, dysentery, and diarrhea. Burns embolism.