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Hucho Bleekeri
''Hucho bleekeri'', the Sichuan taimen, is a species of freshwater fish in the salmon family (Salmonidae), endemic to the Yangtze basin in China. Their typical habitat includes mountain streams and small rivers. They are found in rivers and tributaries in the Sichuan, Shaanxi, and Qinghai provinces. The Sichuan taimen is valued in various academic fields, and may prove helpful in studying fish evolution, and the impacts of climate change on inland, cold-water fish species. They are listed as "critically endangered" by the International Union for Conservation of Nature. Species description The Sichuan taimen typically has a dark black, dorsal, and adipose fin; a silvery white underside; and small, irregular dark spots across the body, head, and gill cover. Their coloring can range from a darker orange/red, to a lighter tan/yellow depending on stage of life. They typically have between 125 and 152 scales, 14 gill rakers, and can grow to 72 cm (2 ft 3in) in length. Biolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shigeru Kimura
Shigeru (written: , , , in hiragana or in katakana) is a masculine Japanese given name. Notable people with the name include: *, a Japanese architect *, a Japanese voice actor *, Japanese karateka *, Japanese sport wrestler *, Japanese socialist politician *, Japanese painter and printmaker *, Japanese actor and singer *, Japanese artistic gymnast *, Japanese Ainu activist *, Japanese baseball player *, Japanese rower *, a video game designer for Nintendo, notable for creating Mario among many other characters *, expert on yokai and creator of the popular manga series ''Ge Ge Ge no Kitaro'', and others *, Japanese baseball player *, Japanese voice actor *, Japanese politician *, Japanese karateka *, Japanese general *, Japanese ice hockey player * Shigeru Takashina (1943–2013), Japanese karateka *, a Japanese automotive team lead, designer, and engineer at Honda, notable for his work on Honda NSX and Honda S2000 projects *, a Japanese film score composer *, Japanese diplomat and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gill Cover
The operculum is a series of bones found in bony fish and Chimaera, chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding. Anatomy The opercular series contains four bone segments known as the preoperculum, suboperculum, interoperculum and operculum. The preoperculum is a crescent-shaped structure that has a series of ridges directed posterodorsally to the organism’s canal pores. The preoperculum can be located through an exposed condyle that is present immediately under its ventral margin; it also borders the operculum, suboperculum, and interoperculum posteriorly. The suboperculum is rectangular in shape in most bony fish and is located ventral to the preoperculum and operculum components. It is the thinnest bone segment out of the opercular series and is located directly above the gills. The interoperculum is triangular shaped and borders the suboperculum posterodorsally and the preoperculum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haplotypes
A haplotype (haploid genotype) is a group of alleles in an organism that are inherited together from a single parent. Many organisms contain genetic material (DNA) which is inherited from two parents. Normally these organisms have their DNA organized in two sets of pairwise similar chromosomes. The offspring gets one chromosome in each pair from each parent. A set of pairs of chromosomes is called diploid and a set of only one half of each pair is called haploid. The haploid genotype (haplotype) is a genotype that considers the singular chromosomes rather than the pairs of chromosomes. It can be all the chromosomes from one of the parents or a minor part of a chromosome, for example a sequence of 9000 base pairs or a small set of alleles. Specific contiguous parts of the chromosome are likely to be inherited together and not be split by chromosomal crossover, a phenomenon called genetic linkage. As a result, identifying these statistical associations and a few alleles of a specif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Diversity
Genetic diversity is the total number of genetic characteristics in the genetic makeup of a species. It ranges widely, from the number of species to differences within species, and can be correlated to the span of survival for a species. It is distinguished from '' genetic variability'', which describes the tendency of genetic characteristics to vary. Genetic diversity serves as a way for populations to adapt to changing environments. With more variation, it is more likely that some individuals in a population will possess variations of alleles that are suited for the environment. Those individuals are more likely to survive to produce offspring bearing that allele. The population will continue for more generations because of the success of these individuals. The academic field of population genetics includes several hypotheses and theories regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flow Velocity
In continuum mechanics the flow velocity in fluid dynamics, also macroscopic velocity in statistical mechanics, or drift velocity in electromagnetism, is a vector field used to mathematically describe the motion of a continuum. The length of the flow velocity vector is scalar, the ''flow speed''. It is also called velocity field; when evaluated along a line, it is called a velocity profile (as in, e.g., law of the wall). Definition The flow velocity ''u'' of a fluid is a vector field : \mathbf=\mathbf(\mathbf,t), which gives the velocity of an '' element of fluid'' at a position \mathbf\, and time t.\, The flow speed ''q'' is the length of the flow velocity vector :q = \, \mathbf \, and is a scalar field. Uses The flow velocity of a fluid effectively describes everything about the motion of a fluid. Many physical properties of a fluid can be expressed mathematically in terms of the flow velocity. Some common examples follow: Steady flow The flow of a fluid is sai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Sinuosity
Sinuosity, sinuosity index, or sinuosity coefficient of a continuously differentiable curve having at least one inflection point is the ratio of the curvilinear length (along the curve) and the Euclidean distance (straight line) between the end points of the curve. This dimensionless quantity can also be rephrased as the "actual path length" divided by the "shortest path length" of a curve. The value ranges from 1 (case of straight line) to infinity (case of a closed loop, where the shortest path length is zero for an infinitely-long actual path). Interpretation The curve must be continuous (no jump) between the two ends. The sinuosity value is really significant when the line is continuously differentiable (no angular point). The distance between both ends can also be evaluated by a plurality of segments according to a broken line passing through the successive inflection points (sinuosity of order 2). The calculation of the sinuosity is valid in a 3-dimensional space (e.g. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Han River (Yangtze River Tributary)
The Han River, also known by its Chinese names Hanshui and Hanjiang, is a major river in Central China. A left tributary of the Yangtze, the longest river in Asia, it has a length of and is the longest tributary of the Yangtze system. The river gave its name to the ancient Chinese Han dynasty, which marked one of ancient China's first golden ages and through it, to the Han Chinese, the dominant ethnic group in modern China and the most populous ethnic group in the world. It is also the namesake of the city of Hanzhong on its upper course. Geography The headwaters of the Han flow from Mount Bozhong in southwestern Shaanxi. The stream then travels east across the southern part of that province. Its highland valley—known as the Qinba Laolin—divides and is protected by the Qinling or Qin Mountains to its north and the Dabashan or Daba Mountains to its south. The main cities are Hanzhong in the west and Ankang in the east. It then enters Hubei. It crosses most of Hubei from th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xushui
Xushui District () is a District of the People's Republic of China, district of the city of Baoding, Hebei province, China. Administrative divisions Towns: *Ansu, Hebei, Ansu (), Cuizhuang (), Dayin, Xushui County, Dayin (), Suicheng, Xushui County, Suicheng (), Gaolincun (), Dawangdian (), Caohe, Xushui County, Caohe () Townships: *Dongshiduan Township (), Liucun Township, Xushui County, Liucun Township (), Zhengcun Township (), Humi Township (), Puhe Township (), Dongfushan Township (), Yilianzhuang Township () Climate References Geography of Baoding County-level divisions of Hebei {{Baoding-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dadu River
The Dadu River (, ), known in Tibetan as the Gyelmo Ngul Chu (), is a major river located primarily in Sichuan province, southwestern China. The Dadu flows from the eastern Tibetan Plateau into the Sichuan Basin where it joins with the Min River, a tributary of the Yangtze River. Measured from its geographic source, the Dadu is actually longer than the Min River, with a total length of and thus forms the main stem of the Min River system. Shuangjiangkou Dam, expected to be the tallest dam in the world, is being built on the Dadu River. Geography Sources The Dadu River originates, in name, in Danba and ends in Leshan where it meets the Min River. The true source of Dadu, and thus the entire Min River system, however, lies in Qinghai Province in the eastern Tibetan Plateau. In this region there are multiple headwaters of the Dadu with nearly identical lengths that have resulted in competing claims as the true source of the Dadu. In 2013, the China Academy of Sciences ann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yangtze River
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] |
Min River (Sichuan)
The Min River () is a in central Sichuan province, China. It is a tributary of the upper Yangtze River, which flows through Chengdu and joins at Yibin. Within China, it was traditionally taken as the main course of the upper Yangtze before extensive exploration of its sources. Geography The Min River flows in the general southern direction. It starts in north-central Sichuan, where its basin is limited by the Qionglai Mountains in the west and the Min Mountains in the east. The river passes through the Longmen Mountains and enters the plains of the Sichuan Basin near Dujiangyan. In that area, the ancient Irrigation System and the modern Zipingpu dam are located. The Giant Buddha of Leshan is built into the stone banks of the Min River. Names Some 19th-century Western authors used the name Blue River as the "colloquial name" for the Minjiang, after the former local Chinese name ''Qingshui'' (, lit. "Clear water"), and the belief that the Min constituted the main c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yangtze Basin
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] |
