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白鱀豚
The baiji (''Lipotes vexillifer'') is a probably extinct species of freshwater dolphin native to the Yangtze river system in China. It is thought to be the first dolphin species driven to extinction due to the impact of humans. This dolphin is listed as "critically endangered: possibly extinct" by the IUCN, has not been seen in 20 years, and several surveys of the Yangtze have failed to find it. The species is also called the Chinese river dolphin, Yangtze river dolphin, Yangtze dolphin, and whitefin dolphin. The genus name ''Lipotes'' means "left behind" and the species epithet ''vexillifer'' means "flag bearer". It is nicknamed the "Goddess of the Yangtze" and was regarded as the goddess of protection by local fishermen and boatmen. It is not to be confused with the Chinese white dolphin (''Sousa chinensis'') or the finless porpoise (''Neophocaena phocaenoides''). This is the only species in the genus ''Lipotes''. The baiji population declined drastically in decades as Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Dolphin
River dolphins are a polyphyletic group of fully aquatic mammals that reside exclusively in freshwater or brackish water. They are an informal grouping of dolphins, which itself is a paraphyletic group within the infraorder Cetacea. Extant river dolphins are placed in two superfamilies, Platanistoidea and Inioidea. They comprise the families Platanistidae (the South Asian dolphins), the possibly extinct Lipotidae (Yangtze River dolphin), Iniidae (the Amazonian dolphins) and Pontoporiidae. There are five extant species of river dolphins. River dolphins, alongside other cetaceans, belong to the clade Artiodactyla, with even-toed ungulates, and their closest living relatives the hippopotamuses, from which they diverged about 40 million years ago. Specific types of dolphins can be pink. River dolphins are relatively small compared to other dolphins, having evolved to survive in warm, shallow water and strong river currents. They range in size from the long South Asian river dolphi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerrit S
Gerrit is a Dutch language, Dutch male name meaning "''brave with the spear''", the Dutch and Frisian form of Gerard.Behind the Name: Gerrit -> People with this name include: * Gerrit Achterberg (1905–1962), Dutch poet * Gerrit van Arkel (1858–1918), Dutch architect * Gerrit Badenhorst (born 1962), South African powerlifter and professional strongman competitor * Gerrit Battem (c. 1636 – 1684), Dutch landscape painter * Gerrit Beneker (1882–1934), American painter and illustrator * Gerrit Berckheyde (1638–1698), Dutch painter * Gerrit Berkhoff (1901–1996), Dutch chemist and university rector * Gerrit Cornelis Berkouwer (1903–1996), Dutch theologian * Gerrit Berveling (born 1944), Dutch Esperanto author * Gerrit Blaauw (1924–2018), Dutch computer engineer * Gerrit de Blanken (1894–1961), Dutch pottery artist * Gerrit van Bloclant (15 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dabry's Sturgeon
Dabry's sturgeon (''Sinosturio dabryanus''), also known as the Yangtze sturgeon, Changjiang sturgeon and river sturgeon, is a species of fish in the sturgeon family, Acipenseridae.Zhuang, P., et al. (1997)Biology and life history of Dabry's sturgeon, ''Acipenser dabryanus'', in the Yangtze River.''Environmental Biology of Fishes'' 48(1-4), 257-64. It is endemic to China and today restricted to the Yangtze River basin, but was also recorded from the Yellow River basin in the past. It was a food fish of commercial importance. Its populations declined drastically, and since 1988, it was designated an endangered species on the Chinese Red List in Category I and commercial harvest was banned. It has been officially declared extinct in the wild by the IUCN as of July 21, 2022. Taxonomy Prior to 2025, it was placed in the genus '' Acipenser'', but this placement was long found to be paraphyletic. In 2025, it was moved to the revived genus '' Sinosturio''. It is the type species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. The UK includes the island of Great Britain, the north-eastern part of the island of Ireland, and most of List of islands of the United Kingdom, the smaller islands within the British Isles, covering . Northern Ireland shares Republic of Ireland–United Kingdom border, a land border with the Republic of Ireland; otherwise, the UK is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea. It maintains sovereignty over the British Overseas Territories, which are located across various oceans and seas globally. The UK had an estimated population of over 68.2 million people in 2023. The capital and largest city of both England and the UK is London. The cities o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge
Cambridge ( ) is a List of cities in the United Kingdom, city and non-metropolitan district in the county of Cambridgeshire, England. It is the county town of Cambridgeshire and is located on the River Cam, north of London. As of the 2021 United Kingdom census, the population of the City of Cambridge was 145,700; the population of the wider built-up area (which extends outside the city council area) was 181,137. (2021 census) There is archaeological evidence of settlement in the area as early as the Bronze Age, and Cambridge became an important trading centre during the Roman Britain, Roman and Viking eras. The first Town charter#Municipal charters, town charters were granted in the 12th century, although modern city status was not officially conferred until 1951. The city is well known as the home of the University of Cambridge, which was founded in 1209 and consistently ranks among the best universities in the world. The buildings of the university include King's College Chap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switzerland
Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland is geographically divided among the Swiss Plateau, the Swiss Alps, Alps and the Jura Mountains, Jura; the Alps occupy the greater part of the territory, whereas most of the country's Demographics of Switzerland, 9 million people are concentrated on the plateau, which hosts List of cities in Switzerland, its largest cities and economic centres, including Zurich, Geneva, and Lausanne. Switzerland is a federal republic composed of Cantons of Switzerland, 26 cantons, with federal authorities based in Bern. It has four main linguistic and cultural regions: German, French, Italian and Romansh language, Romansh. Although most Swiss are German-speaking, national identity is fairly cohesive, being rooted in a common historical background, shared ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Union For Conservation Of Nature
The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status of the natural world and the measures needed to safeguard it. It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable". Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. IUCN does not itself aim to mobilize the public in support of nature conservation. It tries to influence the actions of governments, business and other stakeholders by providing information and advice and through building partners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Poyang
Poyang Lake is the largest freshwater lake in China. Located within Jiujiang Prefecture in Jiangxi Province, it is fed by the Gan, Xin, and Xiu rivers and flows northward into the Yangtze River through a channel. The area of Poyang Lake fluctuates dramatically between the wet and dry seasons, but in recent years the size of the lake has been decreasing overall. In a normal year the area of the lake averages . In early 2012, drought, sand quarrying, and the practice of storing water at the Three Gorges Dam lowered the area of the lake to about . The lake provides a habitat for half a million migratory birds and is a favorite destination for birding. During the winter, the lake becomes home to many migrating Siberian cranes, up to 90% of which spend the winter there. Formation Poyang Lake has also been called Pengli Lake () historically, but they are not the same. Before the Han dynasty, the Yangtze followed a more northerly course through what is now Longgan Lake; ''Pen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dongting Lake
Dongting Lake () is a large, shallow lake in northeastern Hunan Province, China. It is a flood basin of the Yangtze River, so its volume depends on the season. The provinces of Hubei and Hunan are named after their location relative to the lake: ''Hubei'' means "North of the Lake" and ''Hunan'', "South of the Lake". Dongting Lake is famous in Chinese culture as the place of origin of dragon boat racing and is home to the critically endangered Yangtze finless porpoise. Geography In the July–September period, flood water from the Yangtze flows into the lake, enlarging it greatly. The lake's area, which normally is (data before 1998), may increase to in flood season, when vast amounts of water and sediment from the Chang Jiang flow into the lake. The lake is also fed by four major rivers: the Xiang, Zi, Yuan and Li rivers. Small rivers also flow in, the most famous being the Miluo River, where the loyal official and poet Qu Yuan committed suicide in the early 3rd ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shanghai
Shanghai, Shanghainese: , Standard Chinese pronunciation: is a direct-administered municipality and the most populous urban area in China. The city is located on the Chinese shoreline on the southern estuary of the Yangtze River, with the Huangpu River flowing through it. The population of the city proper is the List of largest cities, second largest in the world after Chongqing, with around 24.87 million inhabitants in 2023, while the urban area is the List of cities in China by population, most populous in China, with 29.87 million residents. As of 2022, the Greater Shanghai metropolitan area was estimated to produce a gross metropolitan product (GDP (nominal), nominal) of nearly 13 trillion Renminbi, RMB ($1.9 trillion). Shanghai is one of the world's major centers for finance, #Economy, business and economics, research, science and technology, manufacturing, transportation, List of tourist attractions in Shanghai, tourism, and Culture of Shanghai, culture. The Port of Sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yichang
Yichang ( zh, s= ), Postal Map Romanization, alternatively romanized as Ichang, is a prefecture-level city located in western Hubei province, China. Yichang had a population of 3.92 million people at the 2022 census, making it the third most populous city in Hubei. The city is famous for the Three Gorges, the Three Gorges Dam and the Gezhouba Dam, all three of which are located in Yiling, Yichang, Yiling District, one of the city's districts. History In ancient times Yichang was known as Yiling. In 278 BC, during the Warring States period, the Qin (state), Qin general Bai Qi set fire to Yiling. In 222 AD, Yichang was also the site of the Battle of Yiling during the Three Kingdoms Period. Under the Qing Dynasty, Qing Guangxu Emperor, Yichang Treaty ports, was opened to foreign commerce as a trading port after the Qing and Great Britain agreed to the Chefoo Convention, which was signed by Sir Thomas Wade and Li Hongzhang in Yantai, Chefoo on 21 August 1876. The imperial government ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Echolocation
Echolocation, also called bio sonar, is a biological active sonar used by several animal groups, both in the air and underwater. Echolocating animals emit calls and listen to the Echo (phenomenon) , echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects. Echolocation is used for animal navigation , navigation, foraging, and predation, hunting prey. Echolocation calls can be Frequency modulation, frequency modulated (FM, varying in pitch during the call) or constant frequency (CF). FM offers precise range discrimination to localize the prey, at the cost of reduced operational range. CF allows both the prey's velocity and its movements to be detected by means of the Doppler effect. FM may be best for close, cluttered environments, while CF may be better in open environments or for hunting while perched. Echolocating animals include mammals, especially odontocetes (toothed whales) and some bat species, and, using s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
