Dalat, commonly known as the giant salamander, is unique to China. It is also known as the Chinese giant salamander and is the world’s largest precious amphibious animal. In the food, medicinal, ornamental, scientific research and other aspects have extremely important value. Because of its high economic value, it has led to a large number of illegal capture and trafficking. At the same time, with the mining of the mines and the deforestation of the mines, the natural ecological environment of the wild giant salamanders has been destroyed. As a result, we began artificial breeding of giant salamanders from the mid-1990s. By the end of 2000, we have achieved fruitful results. I. Construction of aquaculture sites 1. Selection of aquaculture sites The water source of the farms is a non-polluted mountain spring stream with clean water and moderate water temperature (the water temperature is maintained at 4 to 25°C for many years). The environment is quiet and the climate is cool. 2. Design and construction of aquaculture ponds We designed aquaculture ponds using a simulated ecological approach. The pool was built with bricks and the surface was cemented. Each pond has an area of ​​40m2 and a depth of 50cm. The pool wall is smooth, and the surface of the pool is made of cement to make a "T" shape to prevent escape. In the pool, bricks are used to cover cement slabs to make them 30 to 50 cm high, and dark holes to stack 10 to 20 cm high pebbles. The bottom of the pool is 1% lower than the bottom of the pool. The water inlet pipe is introduced from above the middle of the pool. A 20-30 cm wide pebble is placed in the ditch, which is 10 cm above the surface of the water, so that when the weather is hot, the squat can find a habitat. The entire culture tank is covered with a shading net. Second, the larvae should be disinfected and seedlings disinfected prior to launching the quail species. If it is a newly built Dianchi Lake, it must be soaked in water for a month before it can be used. The pool was disinfected with quicklime of 150 g/m2, and the disinfectant was soaked in 5% saline for 15 minutes. The delivery time is March in spring, and the water temperature is 8 to 10°C. The density is 8 to 10/m2 for the first instar, 5 to 6/m2 for the second instar, and the neat seed species are kept in the same pool. III. Routine management The daily management of pupa breeding mainly includes the adjustment of water temperature and water quality, feed feeding, disease prevention, and escape prevention. 1. The water temperature adjustment is covered with a shading net during the heat period, keeping the water temperature below 25°C. 2. Water quality The water in the pond was kept fresh. The pH of the water was 7.2-8.2, the water clarity was 30 cm, the dissolved oxygen was 5 mg/l, and the sludge and debris in the pool were cleaned up in 7 days. 3. Feeding the feed The big cockroach is a carnivorous animal. Feed the feed to four times: at regular intervals, each time in the evening feeding; positioning, feeding in a relatively stable position; set quality, feeding fresh, no impurities The feed and live bait are preferably small squid and frog. Quantitative, each feeding amount is 6% to 8% of the total weight of the pupa, and it is fed once every two days in summer and autumn, and every 5 days in winter and spring. once. 4. Disease prevention and control of escape Eel in the artificial breeding environment, due to better management, not often the disease, but the disease is still the main disease found. Symptoms are congested epidermis, oval-shaped erythema, severe point-like ulceration, lesions up to 0.8 cm2, into the back of the hind limbs fall off, the phalanges exposed. The main cause is aggressive bully, mutual biting, injury to the skin, and reinfection of bacteria. As a result, the activities of the building were slow and the food intake was reduced. Control methods: separate cultures according to size and size; regularly inspect and find isolation and treatment of sickness, soak in furazolidone at 0.05 μg/L for 30 minutes, dip once every other day until heal. During the aquaculture process, pay attention to the iron fence at the outlet to prevent it from escaping.
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