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Finless Porpoise
''Neophocaena'' is a genus of porpoise native to the Indian and Pacific oceans, as well as the freshwater habitats of the Yangtze River basin in China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after .... They are commonly known as finless porpoises. Genetic studies indicate that ''Neophocaena'' is the most basal living member of the porpoise family. There are three species in this genus: Description The finless porpoises are the only porpoises to lack a true dorsal fin. Instead there is a low ridge covered in thick skin bearing several lines of tiny tubercles. In addition, the forehead is unusually steep compared with those of other porpoises. With fifteen to twenty-one teeth in each jaw, they also have, on average, fewer teeth than other porpoises, although there is some o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neophocaena Sunameri
The East Asian finless porpoise (''Neophocaena sunameri'') is a species of porpoise native to the East China Sea, Yellow Sea, and the seas around Japan. The Neophocaena asiaeorientalis asiaeorientalis, Yangtze finless porpoise (''N. asiaeorientalis'') was formerly considered a subspecies but is now thought to be a distinct species. Name The Korean communities of the porpoise are sometimes known as sanggwaengi () and the Japan, Japanese communities, particularly the subspecies ''N. p. sunameri'', as sunameri ()(). Distribution The species inhabits the coastal areas off mainland China (e.g., Chongming Island) south to the Penghu, Penghu Islands. The Matsu Islands are thought to be their northern limit, and the local population in this area is physically smaller than the finless porpoise, Indo-Pacific finless porpoise. These two species overlap in the Matsu region. The population in coastal waters around Japan is geographically isolated by the deep waters between Japan and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yangtze Finless Porpoise, 12 February 2008a
The Yangtze or Yangzi ( or ) is the longest river in Eurasia and the third-longest in the world. It rises at Jari Hill in the Tanggula Mountains of the Tibetan Plateau and flows including Dam Qu River the longest source of the Yangtze, in a generally easterly direction to the East China Sea. It is the fifth-largest primary river by discharge volume in the world. Its drainage basin comprises one-fifth of the land area of China, and is home to nearly one-third of the country's population. The Yangtze has played a major role in the history, culture, and economy of China. For thousands of years, the river has been used for water, irrigation, sanitation, transportation, industry, boundary-marking, and war. The Yangtze Delta generates as much as 20% of China's GDP, and the Three Gorges Dam on the Yangtze is the largest hydro-electric power station in the world. In mid-2014, the Chinese government announced it was building a multi-tier transport network, comprising railways, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porpoises
Porpoises () are small dolphin-like cetaceans classified under the family Phocoenidae. Although similar in appearance to dolphins, they are more closely related to narwhals and belugas than to the true dolphins. There are eight extant species of porpoise, all among the smallest of the toothed whales. Porpoises are distinguished from dolphins by their flattened, spade-shaped teeth distinct from the conical teeth of dolphins, and lack of a pronounced beak, although some dolphins (e.g. Hector's dolphin) also lack a pronounced beak. Porpoises, and other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates. Porpoises range in size from the vaquita, at in length and in weight, to the Dall's porpoise, at and . Several species exhibit sexual dimorphism in that the females are larger than males. They have streamlined bodies and two limbs that are modified into flippers. Porpoises use echolocation as their primary sensory system. Some species are well adapt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found in most fish, in mammals such as whales, and in extinct ancient marine reptiles such as ichthyosaurs. Most have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of whales to identify individuals in the field. The bones or cartilages that support the dorsal fin in fish are called pterygiophores. Functions The main purpose of the dorsal fin is usually to stabilize the animal against rolling and to assist in sudden turns. Some species have further adapted their dorsal fins to other uses. The sunfish uses the dorsal fin (and the anal fin Fins are moving appendages protruding from the body of fish that interact with water to ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Asian Finless Porpoise
The East Asian finless porpoise (''Neophocaena sunameri'') is a species of porpoise native to the East China Sea, Yellow Sea, and the seas around Japan. The Yangtze finless porpoise (''N. asiaeorientalis'') was formerly considered a subspecies but is now thought to be a distinct species. Name The Korean communities of the porpoise are sometimes known as sanggwaengi () and the Japanese communities, particularly the subspecies ''N. p. sunameri'', as sunameri ()(). Distribution The species inhabits the coastal areas off mainland China (e.g., Chongming Island) south to the Penghu Islands. The Matsu Islands are thought to be their northern limit, and the local population in this area is physically smaller than the Indo-Pacific finless porpoise. These two species overlap in the Matsu region. The population in coastal waters around Japan is geographically isolated by the deep waters between Japan and continental Asia. Vagrant animals can reach the Ryukyu Islands. Habitat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neophocaena Phocaenoides DSC 03
''Neophocaena'' is a genus of porpoise native to the Indian and Pacific oceans, as well as the freshwater habitats of the Yangtze River basin in China. They are commonly known as finless porpoises. Genetic studies indicate that ''Neophocaena'' is the most basal living member of the porpoise family. There are three species in this genus: Description The finless porpoises are the only porpoises to lack a true dorsal fin A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found .... Instead there is a low ridge covered in thick skin bearing several lines of tiny tubercles. In addition, the forehead is unusually steep compared with those of other porpoises. With fifteen to twenty-one teeth in each jaw, they also have, on average, fewer teeth than other porpoises, although there is some ove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indo-Pacific Finless Porpoise
The Indo-Pacific finless porpoise (''Neophocaena phocaenoides'') is one of eight porpoise species. The species ranges throughout most of the Indian Ocean, as well as the tropical and subtropical Pacific from Indonesia north to the Taiwan Strait. Overlapping with this species in the Taiwan Strait and replacing it northwards is the East Asian finless porpoise (''N. sunameri''). Distribution The Indo-Pacific finless porpoise lives in the coastal waters of Asia, especially around Indonesia, Malaysia, India, and Bangladesh. At the western end, their range includes the length of the western coast of India and continues up into the Persian Gulf. On the eastern edge of their range, they are found throughout the Indonesian archipelago and range north to the Taiwan Strait. Finless porpoises are also one of the species protected at Sundarbans National Park. Description Finless porpoises can grow to as much as in length, and can weigh up to , although most are rather smaller. The fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamps Of Indonesia, 040-05
Stamp or Stamps or Stamping may refer to: Official documents and related impressions * Postage stamp, used to indicate prepayment of fees for public mail * Ration stamp, indicating the right to rationed goods * Revenue stamp, used on documents to indicate payment of tax * Rubber stamp, device used to apply inked markings to objects ** Passport stamp, a rubber stamp inked impression received in one's passport upon entering or exiting a country ** National Park Passport Stamps * Food stamps, tickets used in the United States that indicate the right to benefits in the Supplemental Nutrition Assistance Program Collectibles * Trading stamp, a small paper stamp given to customers by merchants in loyalty programs that predate the modern loyalty card * Eki stamp, a free collectible rubber ink stamp found at many train stations in Japan Places * Stamp Creek, a stream in Georgia * Stamps, Arkansas People * Stamp Brooksbank, English MP * Stamp Fairtex, mixed martial artist * Stamp or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yangtze Finless Porpoise
The Yangtze finless porpoise (''Neophocaena asiaeorientalis'') is a species of toothed whale in the family Phocoenidae, the porpoise family. It is endemic to the Yangtze River in China, making it the country's only known freshwater cetacean following the possible extinction of the baiji (''Lipotes vexillifer''), a freshwater dolphin also native to the Yangtze. The Yangtze finless porpoise is considered critically endangered and it is estimated that only about 1,249 in 2023 remain. This small toothed whale faces many of the same threats as the baiji: high human activity on the Yangtze, such as illegal fishing, pollution, boat traffic, and dam construction. Due to the rapidly declining population of the species, the Chinese government and conservation charities are working to help save it from extinction. Taxonomy The Yangtze finless porpoise is considered a freshwater cetacean (whales, dolphins, and porpoises that live in a variety of aquatic habitats). The finless porpoise orig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basal (phylogenetics)
In phylogenetics, basal is the direction of the ''base'' (or root) of a phylogenetic tree#Rooted tree, rooted phylogenetic tree or cladogram. The term may be more strictly applied only to nodes adjacent to the root, or more loosely applied to nodes regarded as being close to the root. Note that extant taxa that lie on branches connecting directly to the root are not more closely related to the root than any other extant taxa. While there must always be two or more equally "basal" clades sprouting from the root of every cladogram, those clades may differ widely in taxonomic rank, Phylogenetic diversity, species diversity, or both. If ''C'' is a basal clade within ''D'' that has the lowest rank of all basal clades within ''D'', ''C'' may be described as ''the'' basal taxon of that rank within ''D''. The concept of a 'key innovation' implies some degree of correlation between evolutionary innovation and cladogenesis, diversification. However, such a correlation does not make a given ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miyajima Public Aquarium
is an aquarium on the island of Itsukushima in Hatsukaichi, Hiroshima, Japan. The aquarium is accredited as a Museum-equivalent facility by the Museum Act from Ministry of Education, Culture, Sports, Science and Technology. Overview The aquarium has around 350 species of aquatic animals include finless porpoises, sea otters, Steller sea lions, sea lions and penguins. Exhibits The aquarium is divided into several sections across two floors featuring different habitats: * Mudflats of Miyajima * Sea of Healing * Whales of Setouchi * Mysteries of the Sea * Blessings of the Sea * Rocky Shore of Friendship * From Mountains to Sea * Penguin Pool * Sea Lion Pool History Miyajima Public Aquarium opened as a prefectural aquarium in 1959. It was transferred to Miyajima, Hiroshima as a town aquarium in 1967, and its buildings were reconstructed in 1981. In 2005, the aquarium was once again transferred to Hatsukaichi, Hiroshima as a city aquarium. In 2011, a roof was installed near the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
