The baiji (Bá i Jiì tú n) is a kind of baiji that lived in the Yangtze River for about 25 million years. It is an ancient relic species and has survived since Miocene and Pliocene. Baiji dolphin is a small and medium-sized individual member of cetacean family, and it is the one with the least head survival among the five existing freshwater dolphins in the world (puffer fish, Asian puffer fish, constant puffer fish, Indian puffer fish and Baiji dolphin). Baiji dolphin is not only listed as a first-class protected animal in China, but also one of the most endangered animals in the world. Baiji dolphin is also called Baiji dolphin, Baiji dolphin and Baiji dolphin. The baiji family was originally a freshwater dolphin, which was founded in the late 1970s at the suggestion of Professor Zhou Kaiya, a scientist in China. The only species of the genus Baiji in Cetacea. Thirty years ago, there were more than 65,438+0,000 baiji in the Yangtze River. Due to serious river pollution and busy shipping, 1.986 baiji were listed as "1.2 Most Endangered Animals in the World" by the International Union for Conservation of Nature. In 2000, there were only 20 baiji. These amazing figures prove that this lovely creature is saying goodbye to us with the countdown.
1980 65438+ 10 In October, fishermen in Jiayu County, Hubei Province captured the world's first live male baiji near the mouth of Dongting Lake, and immediately sent it to the Institute of Aquatic Biology, Chinese Academy of Sciences, Wuhan City, Hubei Province for artificial propagation. On July 4th, 2002, this baiji dolphin died. 1986 caught a calf. Two and a half years later, the female dolphin died of pneumonia.
During the period of 1995, a mature female baiji was captured in Shishou River section of Hubei Province and raised on Swan Island in Shishou, Baiji Dolphin Nature Reserve in the old Yangtze River channel. During the summer flood of 1996, this baiji dolphin died because it hit the net.
165438+1From October 6 to 65438+February 65438+March 3, 2006, nearly 40 scientists from China, the United States, Britain, Japan, Germany and Switzerland visited the Yichang-Shanghai middle and lower reaches of the Yangtze River 1700 km section. From 1997 to 1999, the Ministry of Agriculture organized a large-scale monitoring operation for the baiji for three consecutive years, and the baiji found in the three years were 13, 4 and 4 respectively. The result of this survey is 0.
1979: China declared the baiji an endangered species.
1983: Legislation prohibits the hunting of baiji.
1986: 300 heads remain.
1997: less than 50 (23 found)
1998: Only 7 heads were found.
In July 2004, the dead baiji dolphin was found stranded in Nanjing section of the Yangtze River.
2006: 0 head