On June 6th, 2006,165438+1October 6th-65438+February 65438+March 3rd, the Institute of Hydrobiology, Chinese Academy of Sciences and Swiss Baiji Dolphin Conservation Foundation jointly launched the "2006 Yangtze River Freshwater Dolphin Survey", with China, Japan, the United States, Canada, Britain and Switzerland.
2018165438+1October 14, updated by the international union for conservation of nature, but the extinction of baiji has not been confirmed, maintaining the original rating of "extremely dangerous".
Living habits of baiji dolphin;
The baiji breathes with its lungs and comes out of the water for air every 10- 100 seconds, making a hissing sound and sometimes spraying water. When breathing, the top of the head and the breathing hole are exposed to the water first, and then the back is exposed.
The breathing time is about 1-2 seconds, and the diving time is about 20 seconds each time. You can dive for 200 seconds without breathing after being frightened or under special circumstances when you feel danger. Under normal circumstances, the respiratory rate is 109- 150 times per hour. The weather is sultry. In shanghai dawn, it will surface frequently and fall together, so the baiji is also called "baijiang pig".