It is reported that bullfrog breeding requires high water quality and is generally cultivated at the water source. Bullfrog farmers must change water every 1-3 days. The dung of bullfrog contains ammonia nitrogen, total phosphorus and other components, which leads to serious eutrophication of water body. However, the dead bullfrogs were left untreated and discarded at will, which also caused the ecological environment pollution of the river.
2. Food pollution
There are parasites such as Vibrio cholerae in bullfrog, which may lead to the epidemic and outbreak of food-borne cholera. Some farmers unilaterally pursue high-density farming and abuse antibiotics to ensure survival rate. These antibiotics enter the sewage treatment plant with the tail water, which will kill beneficial bacteria, not only reduce the sewage treatment effect, but also cause hidden dangers to food safety.
3. Species pollution
Bullfrog is an alien invasive species, which was listed in the Catalogue of National Key Management Alien Invasive Species (the first batch) issued by the Ministry of Agriculture on February 65438+3, 2003 (bulletin number 1897). Adult bullfrog will prey on other frogs, and tadpoles will prey on tadpoles of other native frogs. The tadpole period of bullfrog can be as long as 1-3 years, so it has a great influence on tadpoles of other frogs.