Chinese name: baiji dolphin
Mbth: Yangtze Dolphin
Nicknames: Baiji dolphin, Baiqi dolphin, Pig dolphin, Baiji dolphin.
Field: animal kingdom
Phylum: Chordata phylum
Class: mammals
Order: Cetacea
Suborder: Toothed Whale suborder
Family: baiji family
Genus: Baiji dolphin.
Species: baiji dolphin
Distribution: Yangtze River, Qiantang River, Dongting Lake and the middle and lower reaches of the Yangtze River.
Latin scientific name: Lipotes vexillifer
Protect the value, name the stories related to biological protection, and expand and edit the appearance characteristics of this paragraph.
The baiji, which lived in the Yangtze River for about 25 million years, was a Miocene and Pliocene baiji.
The white dolphin is an ancient relic so far. 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). Due to its small number, the 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 12. 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. It is 2 meters long and weighs 100 ~ 200 kg. The mouth is long and narrow, about 30 cm, with 130 conical teeth densely arranged on both sides of the upper and lower jaws, and the forehead is round. The skin is delicate and smooth, the back is light gray-blue, the abdomen is clean and white, the body surface is streamlined, the forelimbs are flippers, and the dorsal fins are triangular. The hind limbs degenerate, and the tail end is flat and divided into two pieces, which are crescent-shaped. There is a long and round hollow nose or breathing hole on the upper left of the head. The eyes are only the size of mung beans, which have degenerated and are located behind and above the corners of the mouth. There is only a hole in the ear the size of a needle eye, which is located behind the eye, and the external auditory canal has disappeared.
Edit the body structure of this paragraph.
Baiji dolphin is a carnivore, with about 130 fangs in its mouth, belonging to the same type. Often swim to the shallow water on the shore in the early morning and evening to hunt. Generally speaking, the whole freshwater fish with a body length of less than 6.5 cm is the main food, and a small amount of aquatic plants and insects are also eaten. When breathing, the head comes out first, then all the water comes out, 2 meters upstream of the water surface, and then enters the water. Baiji dolphin's vision is almost zero, and it has extensive scientific research value in biology, bionics and physiology by relying on echolocation to understand environmental changes. However, baiji is timid by nature and easily frightened. Generally far away from the ship, it is difficult to get close. In addition, it has a small population and a wide range of activities, so the research on baiji in the wild state is very limited. The skin of baiji is smooth and delicate, and it has a special elasticity. The principle is the same as the elastic nylon fabric used in competitive swimming suits, which can reduce the turbulence around the body when swimming fast in water. Its caudal fin is divided into two forks, the pectoral fin on both sides is flat palm-shaped and the dorsal fin is triangular. These four fins provide excellent direction and balance control for baiji swimming in the water. Coupled with smooth and elastic skin and streamlined body, baiji can swim at a speed of 60 kilometers per hour when avoiding danger. Usually, it maintains a swimming speed of 10 to 15 kilometers per hour. The baiji dolphin has lived in the turbid water of the Yangtze River for a long time, so its vision and hearing are seriously degraded. In water, it mainly uses sonar to receive signals to identify objects. The upper respiratory tract of baiji has three pairs of unique airbags and a throat shaped like a goose's head, but because it lives in water and makes sounds by water, it doesn't have the vocal cords needed by land animals to make sounds in the air. Through a special hydrophone, you can hear dozens of different sounds, such as the "answer" and "quack" sounds made by the baiji. Baiji dolphins usually make sounds in pairs. After making a sound, they will wait for the echo quietly, so as to distinguish the distance and size between themselves and the obstacle that produces the echo and consider whether to swim to the target. It will make a new pair of sounds soon after receiving the echo, and then wait for the echo quietly for a while. After receiving the second echo, it can analyze the swimming direction and speed of the target. This is how the baiji locates the echo like an artificial sonar. With this unique sonar system, it can often catch food in the mud at the bottom of the river, and it can also send out high-frequency sound waves that people can't hear, and contact companions more than ten kilometers away. The brain surface area of baiji dolphin is larger than that of dolphins, and the brain weight accounts for about 0.5% of the whole. Among them, the average weight of a male dolphin weighing 95 kilograms is 470 grams. This weight is close to the brain weight of gorillas and chimpanzees, and some scholars even think that baiji is smarter than gibbons and chimpanzees.
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Baiji dolphin mainly lives in the middle and lower reaches of the Yangtze River and its connected waters, such as Dongting Lake, Poyang Lake and Qiantang River. Usually in pairs or above 10, they like to move in deep water and rapids. The existing number is scarce. It was estimated that there were only about 300 heads 20 years ago, and it was on the verge of extinction.
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Baiji dolphins like to live in groups, especially in the spring mating season, and the group behavior is more obvious. Generally, each group has 2~ 16 heads. It has a wide range of activities, but it needs high water temperature. It often stays in a fixed area for a period of time, and then moves to another area after the water temperature changes. Feed on fish. Baiji dolphin likes to live in the deep waters of rivers, rarely near the shore and ships, but it often swims to shallow waters, chasing fish and shrimp to satisfy its hunger. Its snout is wide and slender, and there are more than 130 conical teeth in the upper and lower jaws, but it is too lazy to chew, just swallowing fish food with its mouth open, and its digestion ability is very strong. Baiji dolphin often moves together in groups of three or five or in pairs, but people rarely get a chance to see it, only when it comes out of the water to breathe. Baiji dolphins are distributed in the Yangtze River from Zhicheng, Hubei Province to the Yangtze River estuary, about 1600 km long. They eat fish and like social activities. There are about 2~3 small groups and 9~ 16 large groups. Baiji dolphin is an aquatic mammal that breathes with its lungs. Every time he breathes, the top of his head and breathing holes first emerge from the water, and then his back and low triangular dorsal fin are exposed. The breathing time of the water is about 1~2 seconds, the diving time is about 20 seconds each time, and the long-term diving can reach 200 seconds. Mature individuals is generally the longest, 2.5 meters for females and 2.3 meters for males, and weighs 100~ 150 kg. It has a constant body temperature, always around 36 degrees Celsius.
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There are two estrus periods every year, March-May and 8- 10. The gestation period is 10 ~ 1 1 month. Every birth 1 baby (some have 2 babies). Baiji dolphins breed every two years, each offspring 1, and the body length is about 80 cm at birth. Newborn larvae are slightly darker in color. Adult baiji generally has a light bluish gray back and a clean white abdomen, which is particularly bright in the sun. The upper and lower surfaces of horizontally extending flippers and caudal fins are the same color as the back and ventral surfaces, respectively, so the color distribution is just in line with the environmental color. Looking down from the water surface, it is difficult to distinguish the bluish gray on the back from the river water; Looking up from the bottom of the water, it is difficult to find that the white belly is similar to the strong light reflected from the water surface. This gives the baiji a natural hidden barrier to avoid enemies and approach prey. The life span of baiji dolphins can reach more than 30 years, and females generally reach sexual maturity at the age of 6 and males at the age of 4. Adult baiji is in estrus twice a year, from March to May and from August to 10. The gestation period is10-1month, with one litter and occasionally two litters. In the wild, the male-female ratio of adult baiji is 1: 1, but the pregnancy rate of females is generally only 30%, and the natural reproduction rate is very low. The mating period of baiji dolphins is from late winter to early spring every year, and the pregnant period of female dolphins is about 1 year, so most young dolphins are born in the spring of the following year. After birth, the small white fin dolphin was fed by its mother's milk until it was five or six years old. The average life expectancy is 30 years.
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Qiqi and Pearl Krabs-Happy Partners
In the 1950s, a large number of baiji dolphins could still be seen in the middle reaches of the Yangtze River, but since then, the number of baiji dolphins has dropped sharply and disappeared in lakes and tributaries along the Yangtze River. There are less than 100 people in the Yangtze River, leaving only a section from Zhicheng in the middle reaches of the Yangtze River to Nanjing. In recent years, the population has decreased rapidly. According to reports, in the early 1980s, there were more than 400 heads, but 1986 was reduced to 300 heads, 1990 was 200 heads, 1993 was more than 130 heads, and 195 was less than that. It is listed as 1 protected animal in the List of National Key Protected Wild Animals in China. It is listed as an endangered species in the Red Book of Endangered Animals in China, and it is listed in the appendix of Washington Convention: A Class of Protected Animals. Lonely Qiqi
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, only 300 baiji were left in 1.986, which was listed as "1.2 World's Most Endangered Animals" 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 Hydrobiology, 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. From June 6, 2006 to February 6, 2006, nearly 40 scientists from China, the United States, Britain, Japan, Germany and Switzerland visited the middle and lower reaches of the Yangtze River from Yichang to Shanghai 1700km, and no baiji was found. From 1997 to 1999, the Ministry of Agriculture organized a large-scale monitoring operation of baiji for three consecutive years, and found 13, 4 and 4 baiji respectively in three years. The result of this survey is 0. 1979: China declares the baiji as an endangered species 1983: legislation prohibits the hunting of baiji 1986: 300 remaining 1990: 200 remaining 1997: less than 50 (23 found) 60. 004: In July 2006, the corpse of baiji was found in Nanjing section of the Yangtze River. 2007: The Yangtze baiji dolphin was officially declared extinct on August 8, 2007: August 19. A citizen of Tongling, Anhui Province accidentally discovered a suspected baiji animal in the reach of Tongling Freshwater Dolphin National Nature Reserve and photographed it with a digital camera.
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According to fossil records, baiji migrated from the Pacific Ocean to the Yangtze River 25 million years ago. Erya, an ancient book written by China more than 2,000 years ago, also described Baiji dolphin as a river god. Baiji dolphins were once widely distributed in Dongting Lake and Poyang Lake in the Yangtze River basin, and were found as far as 35 kilometers upstream of Gezhouba in the Three Gorges area and the Yangtze River estuary near Shanghai. It is estimated that there used to be as many as 5000 in history. However, for a long time, affected by human activities, its population has been decreasing and its distribution area has gradually narrowed. The baiji (bái qí tún) is a kind of baiji that lived in the Yangtze River for about 25 million years. It is an ancient relic that 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.
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1978: Institute of Hydrobiology, Chinese Academy of Sciences established the Baiji Dolphin Research Group. The scientific research of baiji was officially started. 1978; The State Council promulgated the Regulations on the Protection of Water Resources Breeding and the General Order on Strict Protection of Rare Wild Animals, both of which listed Baiji Dolphin as the key protection object. 1980: The Hubei Provincial Government issued the Notice on Protecting the Precious Animal Baiji Dolphin. 1986: the international symposium on biological protection of freshwater dolphins was held in Wuhan, and baiji became the focus of scientists at home and abroad. In the same year, China Bank Governor Chen donated 500,000 US dollars to Baiji Dolphin. In the same year, Pearl Krabs was captured and farmed. 1988: Pearl Krabs passed away on September 27th. 1992: The Ministry of Agriculture approved the establishment of two national-level nature reserves of baiji in Shishou and Honghu, Hubei, and approved the establishment of five protection stations in Jianli, Hubei, Chenglingji, Hunan, Hukou, Jiangxi, Anqing, Anhui and Zhenjiang, Jiangsu. 1993: the international conference on the protection of baiji was held in Nanjing. 1995: A baiji was captured and died in the net the following year. 1996: In February, the Ministry of Agriculture held an emergency meeting on the protection of baiji to discuss the protection countermeasures. 65438+February 25th, Wuhan Baiji Dolphin Protection Foundation was formally established. 1997: In June, experts from china wildlife conservation association and some college students from Peking University and the National People's Congress proposed that1997 be designated as the Year of Saving the Endangered Wild Animal-Baiji Dolphin. 1997: In August, the "Yangtze River Treasure Baiji Dolphin Exhibition" was held in beijing museum of natural history. 2000: In April, the website "Aibaifen" was opened in Beijing. 2000: In September, Wuhan invested 600,000 yuan to hold the popular science exhibition "Saving Baiji Dolphin". Originally planned to receive 200,000-300,000 people, but the final number of visitors was 167 1, so the exhibition was forced to be cancelled in advance. 2002: In March, Tao Xingshi, a member of the Chinese People's Political Consultative Conference, submitted a proposal to strengthen the protection of baiji at the CPPCC meeting. 2002: 14 July, Qiqi died. 2006: The investigation of freshwater dolphins in the Yangtze River, the habitat of Baiji dolphins, ended without results. 2006: A thorough investigation in China found no trace of baiji, and scientists wanted to know whether this rare species had disappeared from the earth. 2007: In the reassessment on August 8th, Baiji dolphin was marked as wild extinction. 20 10:65438+ 10/2 is the 30th anniversary of Qiqi's stay in Wuhan Baiji Dolphin Museum. There is no commemoration, mourning or nostalgia in the museum, only a curious specimen soaked in formalin. 20 10: The researchers reported in a new study that according to the memories of local fishermen, even after the deadly decline of this species in the mid-1990s, they could still find the trace of baiji in the middle and lower reaches of the Yangtze River in China.
Edit the protection value of this paragraph.
Baiji dolphin is a precious "living fossil" for studying the evolution of cetaceans, which has important scientific research value for bionics, physiology, zoology and military science. Baiji dolphin, cetacean freshwater dolphin, national first-class protected animal. It is a rare aquatic mammal unique to China, and is known as the "panda in the water". It has been listed in the list of extinct species in the world, and it has been listed as one of the top ten extinct species in recent years by the United Nations Fund for Nature and the American Discovery Channel (the other nine species are: West African black rhinoceros, golden toad, Hawaiian crow, Seychelles snail, etc.
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According to the survey in the mid-1980s, the total number of Yangtze baiji dolphins has dropped to less than 200, of which 50% are distributed from Shishou County, Hubei Province to the upper reaches of Wuhan City, mainly inhabiting the large backwater area of meandering reach or meandering branch reach. Due to the increase of human activities or improper activities, the number of accidental deaths of baiji has increased. According to statistics, during the period from1973 to1985, 59 people died accidentally, among which 29 people died because of fishing hooks or other fishing gear, accounting for 48.8%; 1 1 The head died in the river blasting operation, accounting for18.6%; 12 head was killed by ship propeller, accounting for 20%; 6 heads were stranded and died, accounting for10%; 1 head mistakenly entered the sluice, accounting for 1.6%. According to statistics, one third of the accidental deaths of baiji in the lower reaches of the Yangtze River were killed by ship propellers. 1997165438+1October 4 ~ 10, organized by the Ministry of Agriculture, was attended by more than 200 scientific research and fishery workers from six provinces and cities, including Hubei, Hunan, Anhui, Jiangxi, Jiangsu and Shanghai. After 7 days of hard observation, the existing number of baiji dolphins is not optimistic, which is less than 100. The distribution range has also been greatly reduced, and it is difficult to see baiji in the upper reaches of Zhicheng, the lower reaches of Nanjing, Dongting Lake and Poyang Lake. In the past ten years, the number of baiji dolphins has dropped by nearly 100, which cannot but cause people's shock. According to experts' analysis, another main reason for the sharp decline of the baiji is the increasingly serious water pollution in the Yangtze River and the rapid decrease of fish resources, which makes the baiji's food resources increasingly scarce. The current situation tells people that no matter when the Three Gorges Project is completed, everyone must take urgent action and take comprehensive measures to rescue the baiji. After the impoundment of the Three Gorges Reservoir, the discharge and water depth in the middle and lower reaches of the Yangtze River will increase during the dry season, which is extremely beneficial for the baiji to survive the winter and is expected to avoid being stranded and dying. Strengthening management can greatly reduce accidental deaths caused by fishery activities; However, due to the development of shipping in the middle and upper reaches of the Yangtze River, there will be more and more incidents of baiji being killed by ship propellers in the middle reaches of the Yangtze River. Therefore, we should study the reasons why the baiji chased the propeller of the ship and take practical countermeasures. In order to protect the baiji, the best countermeasure is to establish a nature reserve with strict management and advanced equipment. The baiji dolphin nature reserve in Xinluo section of the Yangtze River has been approved by the Ministry of Agriculture. It starts from Luoshan and ends at Xintankou River, with a total length of135km. The river surface in this area is wide, the river course is tortuous, the water depth is about 25 meters, and the flow rate is about 0.3~0.8 meters per second. Shoals and Jiang Xinzhou are scattered all over the place, which is the most densely distributed water area of baiji. The upstream of this area is close to the Dongting Lake exit, and Honghu Lake, Huanggai Lake, Xiliang Lake, Wuhu Lake and Lushui Reservoir flow into it. There are chicken heads, Sanmao chickens and Chibi chickens along the coast, which highlight the river and control the flow direction and flow pattern. The natural conditions mentioned above work together to form many deep valleys and large backwaters in the nature reserve, which is an ideal living environment for baiji. The main tasks of nature reserves are: 1, providing superior natural living environment for protected objects, avoiding human interference and protecting rare species; 2. Resolutely ban harmful fishing gear, prohibit fishing operations in protected areas and some areas outside protected areas, investigate and correct the behaviors of motor vessels that violate the rules of navigation and discharge "three wastes" in violation of regulations; 3, rescue the injured, accidentally caught, stranded rare aquatic animals; 4. Regularly observe and record the activities and population changes of rare aquatic animals in the reserve. 5, publicize the relevant laws, regulations and protection knowledge, so that the protection of rare species becomes the conscious action of the masses; 6 to establish an experimental base for the study of rare aquatic animals, especially reproductive biology.
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Baiji dolphin is a rare aquatic mammal endemic to China, distributed in the middle and lower reaches of the Yangtze River. Its number is extremely rare and endangered, and its shape is beautiful, so it is known as the "goddess of the Yangtze River". It is the most endangered animal in China and one of the most endangered animals in the world. To some extent, baiji is more precious than giant panda! Qiqi is one of the "Goddess". On June 5438+0980+1October 1 1, it was captured by fishermen from the mouth of Dongting Lake and sent to Wuhan Institute of Hydrobiology, Chinese Academy of Sciences for artificial propagation, becoming the only baiji in the world. 1986, a female baiji was captured and named Pearl Krabs, ready to marry Kiki. However, before Pearl Krabs reached sexual maturity, she died of acute disease on 1988. In 2006, Pei Chen Xun, the first person who studied the baiji, reluctantly revealed a possible cause of Pearl Krabs's death: the sunshade on the west side of the pond was of poor quality, and iron filings, sawdust and other sundries would fall into the pond on windy days. Because there is no other pond to transfer the baiji, it has not been repaired. After Pearl Krabs died, 700 grams of iron filings, glass and stones were found in his stomach. 1995, a female dolphin was captured in the Yangtze River and temporarily placed in the old Yangtze River waterway of Swan Island in Shishou. But I didn't expect it to hit the net and die in the flood the next year. 1At the end of 999, a two-meter-long baiji ran aground on Chongming Island in Shanghai, and local fishermen ignored it because they didn't know it was a "giant panda in the water", which eventually led to the baiji starving to death. On the morning of July 14, 2002, Qiqi was lying on the edge of the underwater steps. After 22 and a half years of artificial reproduction, she died safely and alone. 1997 10 A Guiyang native of 10 learned about Qiqi from China Youth Daily, and he had an indissoluble bond with it. Guiyang people alias "Aiqi". Since 197 Wuhan Baiji Dolphin Protection Foundation was established, he insisted on sending his own pocket money 10 yuan to Qiqi every month, without interruption, until Qiqi passed away quietly in July 2002, and on 10 of that month, Aiqi gave it to Qiqi. "Archie" never allowed the media to reveal his real name. He said: "Love" is natural. Everyone has the right to choose his own love, and he has no intention to influence others through his behavior in the newspaper, so maybe love is more real and eternal. In China, the muddy water and smog of the Yangtze River, coupled with the rapid flow of the Yangtze River, people still need great patience to find the trace of baiji by boat. For the backward scientific research equipment in China in 1980s, it is even more difficult for the Institute of Aquatic Sciences of Chinese Academy of Sciences to locate and capture the female baiji alive. 1985 15 years 10 in mid-October, Dr. Gerwater, Dean of Duisburg Zoology College in West Germany, was invited to take a boat in the waters more than 800 miles near Dongting Lake in the Yangtze River basin, and used sonar equipment to find and capture the baiji, but in the end it failed. At that time, Dr. Gewater also asserted that it was impossible to capture the baiji alive in the Yangtze River without more advanced equipment and technology. However, five months later, on March 3 1, 1986, Wan Enquan, then a fisherman from Honghu Lake, and members of the Yangtze River Baiji dolphin expedition team led by local fishermen, successfully captured them in Guanyinzhou, Jingzhou, with the guidance and help of Hua, a senior engineer from Institute of Hydrology, Chinese Academy of Sciences. The two baiji dolphins were transported to the outdoor pool of the Institute of Aquatic Sciences, Chinese Academy of Sciences by the same dry transport method as their temporary homes. I didn't put them in Baigongguan at first, for fear that Qiqi wouldn't be able to adapt for a while, because Qiqi was only two years old when he was caught, but he has been artificially raised in Baigongguan for six years and has never "seen" another baiji. The researchers of Institute of Aquatic Sciences of Chinese Academy of Sciences then measured and named them. The female is called "Pearl Krabs" and the male is called "Lianlian". It is found that Lianlian is Pearl Krabs's father dolphin. After Pearl Krabs and Lian Lian moved into the Institute of Aquatic Sciences of the Chinese Academy of Sciences, they were not used to the artificial breeding environment for some time and went on a hunger strike. Hospital staff soon found that Pearl Krabs had difficulty breathing without water. Even for a few days, he didn't have the strength to swim out of the water to breathe. Even though he was on a hunger strike, he tried his best to lift Pearl Krabs's head out of the water and let it breathe to avoid suffocation. This scene touched the scientists in the hospital. They began to expand the pool for father and daughter in Bai Mansion. 1986 June 14 died before moving into baifu new pool. It only survived for 76 days under the condition of artificial reproduction. Pearl Krabs is especially sad for his dead father. After moving into the newly-built pool in Baigongguan, he began to hunger strike intermittently. Experts from China Academy of Sciences artificially fed special fish sauce to keep Pearl Krabs healthy. The newly-built swimming pool and Qiqi's swimming pool are separated by a concrete wall, because at first, I was afraid Qiqi wouldn't adapt to Pearl Krabs's invasion of its residence. However, when the swimming pool in Pearl Krabs was completed, a waterway wide enough to accommodate a dolphin was left in the middle. If they want, Pearl Krabs or Qiqi can swim into the pool of another baiji at any time. After moving into Bai Mansion for a week, he found himself swimming around the opening of the waterway. Qiqi is also curiously surrounded by another opening of the waterway. One day, the experts put the hydrophone in the middle of the waterway, and as a result, they heard the 6 kilohertz whistle of communication between dolphins. A few days later, experts found Pearl Krabs swimming in Qiqi's swimming pool. Qiqi looks a little scared and hides in a corner. This lasted for a week, and Pearl Krabs and Qiqi gradually got to know each other. Only at that time, Pearl Krabs was not sexually mature when she was captured, so she couldn't get pregnant. However, experts found that sexual characteristics began to appear after Pearl Krabs entered Qiqi's swimming pool. In the second year, Qiqi and Pearl Krabs often had sexual intercourse in estrus, but Pearl Krabs didn't reach sexual maturity after all, so she never got pregnant. 1September 27th, 988, Pearl Krabs suddenly fell ill and died unfortunately. Artificial rearing for 2.5 years is the longest-lived baiji in the protected environment after Qiqi. /kloc-0 At the end of 995, a female baiji was captured in Shishou Valley of the Yangtze River in Hubei Province. Experts haven't had time to transport it to Baigongguan to be paired with Qiqi, and this female dolphin, which was temporarily released to the Yangtze River in Shishou Swan Island, unfortunately died in the flood in the following summer. 1999 In early 1999, local migrant workers found a stranded female dolphin on the beach west of Chongming Island in the Yangtze River estuary of Shanghai, with a body length of more than 2 meters and a weight of 100 kilograms. Because those migrant workers didn't know it was a rare "giant panda in water" in China, it was trapped in the pond for seven days. Finally, the relevant departments were notified. On the tenth day, the expert rushed to the scene, but because it had been fasting for seven days, it caused heart failure. He died just after being transported to Shanghai. Three females caught by aquatic scientists looking for a mate for Qiqi died before they could mate with Qiqi in white public relations. These three failures can be said to be the last failure of artificial reproduction of baiji. Qiqi, who is sexually mature, lives alone in Bai Mansion and is particularly lonely. According to experts, every estrus from April to June, Qiqi is always "fidgeting, often hitting the pool wall with his body." Endocrine disorders complicated with hepatitis and diabetes. Its liver damage leads to hyperlipidemia and hyperglycemia. GPT index is as high as 1500 unit, which is 150 times of normal value; The triglyceride index is as high as 1, 1000 unit, which is 100 times of the normal value; The glycemic index is as high as 900 units, which is 9 times the normal value. Only after some treatment by Chinese and foreign experts can we turn the corner. 1997 spring, it started a short hunger strike again, and experts such as Zhao Qing had to feed it with fish paste. At 6 o'clock in the morning of July 14, 2002, researchers from the Institute of Aquatic Sciences of Chinese Academy of Sciences visited the Baiji Dolphin Museum of the Institute of Aquatic Sciences of Chinese Academy of Sciences as usual and saw Qiqi swimming in the pool. There is nothing unusual. The work record of the previous day said: feed at night and eat normally. At 8 o'clock, when the staff walked into the "White Mansion" again, they found Qiqi lying motionless underwater. After some rescue, it failed to be saved, and the only artificially raised baiji in the world passed away. Qiqi was about 25 years old when he died, which was equivalent to 70 years old. After 22 and a half years of artificial breeding, Qiqi is the first artificially bred baiji in modern aquatic science, the most successful baiji in artificial breeding environment and the last artificially bred baiji in the world.
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How to write Bai Bo, baiji and baiji was once a problem. Hey, it can be tested. Er Ya: "Gun, it's a gun." According to Zhou Kaiya, an authority on baiji research, baiji and baiji are many aliases of baiji. However, after the "2006 Yangtze River Freshwater Dolphin Survey", the names in the media are still different. Among the intelligent ABC pinyin input methods commonly used by China people, only the relatively nonstandard alias "Baiji Dolphin" is a word, so it is the most, followed by "Baiji Dolphin" and "Silver Carp", which can't be typed at all. They are named after "Baiji Dolphin" and are as rare as the morning star.