First, the whitebait in Taihu Lake, also known as noodle fish and silver striped fish, belongs to freshwater fish, and is a small economic fish which is a specialty of our country. It is slender in shape, silvery in color, delicious and tender in meat, free of phosphorus and wordless, edible for all fish, and rich in nutrition, and contains protein, fat, iron, riboflavin, calcium and phosphorus. With high economic value, it is known as the queen of fish. In the 1970s, except Japan, many foreign countries had whitebait trade with China, which became an important export variety in China. Earlier, whitebait was only cultured in Taihu Lake, but 1979, whitebait in Taihu Lake was transplanted to other places for the first time, and fishermen in Dianchi Lake became the first people to eat crabs. 1985, the output of whitebait in Dianchi Lake successfully surpassed that in Taihu Lake, resulting in economic benefits far exceeding 70 million. Seeing the success of whitebait in Dianchi Lake, more and more places have gradually started to make a profit. Since then, there has been a craze for transplanting whitebait in China. Whitebait in Taihu Lake has been transplanted to 2 1 different provinces in China, except Taiwan Province and Shaanxi provinces.
Second, the price of domestic tours ranges from 25 to a catty in 60 yuan. A good catty costs hundreds of yuan, and a fish can create an output value of tens of millions of yuan in the 1990s. Such a big profit is really enough to make people crazy. In addition, the adaptability and reproductive ability of whitebait are not weak, and it can reproduce naturally, with the amount of eggs reaching about 3 thousand meters, and it is not necessary to throw in the seedlings every year, so the breeding cost is low, and it can be quickly propagated and weighed within five months. For various reasons, a whitebait has become a violent attack. However, it is worth noting that the whitebait in Taihu Lake does not only refer to a kind of fish, but also includes several major species of whitebait in Taihu Lake, whitebait with short teeth, whitebait with large teeth, whitebait in Leishi and whitebait in Taihu Lake. Among them, the most economically valuable ones are the new whitebait and whitebait in Taihu Lake, which are also widely cultivated by everyone. Although whitebait has its own advantages, not every transplant can guarantee success.
Third, it is understood that the cost per 1 10,000 whitebait fertilized eggs is about 50 yuan, and the cost of 1 10,000 mu of water is about170,000 yuan, which seems to be very high, but once the transplantation is successful, it seems that this cost is not worth mentioning, but if it fails to be put into use many times, it will eventually lose all its money. The Inner Mongolia Sea is a typical example. When the sea first agreed to English, it was very smooth, and the output gradually increased. Soon, it could form a considerable fishing output, but people were caught off guard. In the end, the whitebait in the lake disappeared without warning, resulting in heavy losses in the local area. In 20 16, the population of whitebait in a city of Heilongjiang also broke out, but at that time, male and female fish could not complete mating, resulting in a sharp drop in output, and all kinds of unexpectedly lost whitebait industries fell into a trough again.
Fourthly, some studies show that the success rate of natural hatching of whitebait is very low, and the water quality is very high. Once the water environment is abnormal, whitebait eggs may not hatch, which will eventually lead to the annihilation of the whole population, and the breeding cost and technology are very high. For the sake of insurance, fishermen will not choose to breed. In addition, the whitebait in Taihu Lake has the habit of swallowing fish eggs, small fish and shrimps, resulting in the disappearance of indigenous fish in the box. It can be seen that although the whitebait in Taihu Lake has brought huge economic benefits, it also poses a threat to the entire ecosystem.