Are there giant salamanders in Hainan? Are the climatic conditions in Hainan suitable?

The giant salamander, commonly known as the giant salamander, is unique to China, so it is also called the Chinese giant salamander, which is the largest precious amphibian in the world. It has high edible, medicinal, ornamental and scientific research value. Because of its high economic value, it leads to a large number of illegal fishing and sales. At the same time, with the exploitation and deforestation of mines, the natural ecological environment of wild giant salamander has been destroyed and its stock is very small. Therefore, we began to breed giant salamanders artificially in the mid-1990s, and by the end of 2000, we had achieved fruitful results.

First, the construction of farms.

1. Selection of farm land

The water source of the farm is pollution-free mountain spring water with clean water quality, moderate water temperature (4 ~ 25℃ for many years), quiet environment and cool climate.

2. Design and construction of aquaculture ponds

We use the method of simulated ecology to design the aquaculture pond. This pool is made of bricks and coated with cement. Each swimming pool has an area of 40 square meters and a depth of 50 cm. The pool wall is smooth, and the pool surface is made of cement into a T-shaped escape eaves. Make a hole 30-50 cm high with brick cover and cement board in the pool, and pile pebbles 10-20 cm high in the hole. The slope of the bottom of the pond is 1%, and a sewage pipe is set at the lowest part of the pond. The water inlet pipe is introduced from the middle of the pool. Put a pebble with a width of 20 ~ 30 cm in the pond ditch, which is 10 cm higher than the water surface, so that the giant salamander can find a habitat when the weather is sultry. The whole culture pond is covered with a sunshade net.

Second, the species of giant salamander.

Before the giant salamander fry enter the pond, it should be disinfected and disinfected. If it is a new giant pond, it must be soaked in water for one month before it can be used. Disinfect the pond with quicklime 150g/m2 and the giant salamander with 5% salt solution 15min. The release time is March in spring, the water temperature is 8 ~ 10℃, the density of the first-year catfish is 8 ~ 10 catfish /m2, and the second-year catfish is 5 ~ 6 catfish /m2. Catfish with normal specifications are raised in the same pond.

Third, the daily management

The daily management of giant salamander adult culture mainly includes water temperature and quality regulation, feed feeding, disease prevention and escape prevention.

1. Water temperature regulation

When it is hot in summer, cover it with a sunshade net to keep the water temperature below 25℃.

2. Water quality regulation

The water quality of adult catfish pond is kept fresh, with pH value of 7.2 ~ 8.2, transparency of pond water of 30 cm and dissolved oxygen of 5 mg/L, and sludge and sundries in the pond are cleaned every 7 days.

3. Feed feeding

Giant salamander is a carnivorous animal, and there are four ways to feed it: feeding it regularly, every time in the evening; Positioning, feeding in a relatively stable position; Determine the quality, feed fresh bait without impurities, and live bait is preferably small crucian carp and frog; Quantitatively, the feeding amount is 6% ~ 8% of the total weight of giant salamander, once every two days in summer and autumn and once every five days in winter and spring.

4. Disease prevention and escape prevention

In the artificial breeding environment, the giant salamander does not often get sick because of good management, but skin rot is still the main disease found at present. The symptoms of adult giant salamander are hyperemia and oval erythema, and in severe cases, punctate ulceration occurs, with the largest lesion of 0.8 cm ~ 2. When the giant salamander comes of age, the tips of its limbs fall off, exposing its phalanges. The main reason is that giant salamanders are aggressive and bite each other, causing skin damage and bacterial reinfection. As a result, the giant salamander moves slowly and eats less. Prevention and control methods: separate cultivation according to size and specifications; Frequent examination showed that the sick salamander was treated in isolation and soaked in 0.05 μ g/L furazolidone for 30 minutes every other day/kloc-0 times until it recovered.

In the process of breeding, pay attention to setting an iron fence at the water outlet to prevent the giant salamander from escaping.

Hainan really doesn't know if there are such bad breeding conditions. If there is, it is also very few.