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Culter Alburnus
''Culter alburnus'', the topmouth culter, is an East Asian species of freshwater ray-finned fish genus '' Culter'', this belongs to the family Xenocyprididae. Geographic distribution and habitat ''Culter alburnus'' occurs in Lake Buir, the Onon and Kherlen River drainages in Mongolia, as well as the Amur and Red River drainages in Far East Russia and China, it has also been recorded from Taiwan and Hainan. It can be found in rivers and floodplain lakes which have dense growth of macrophytes Aquatic plants, also referred to as hydrophytes, are vascular plants and non-vascular plants that have adapted to live in aquatic environments ( saltwater or freshwater). In lakes, rivers and wetlands, aquatic vegetations provide cover for aquat .... References Culter (fish) Fish described in 1855 {{Cultrinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stepan Ivanovich Basilewsky
Stepan (; ; ) is a rural settlement in Sarny Raion (district) of Rivne Oblast (province) in western Ukraine. Its population was 4,073 as of the 2001 Ukrainian Census. Current population: The settlement is located in the historic Volhynia region of Ukraine, on the left bank of the Horyn, a tributary of the Prypiat. History The first written mention of Stepan dates back to 1290. In 1900, the Jewish population of Stepan totaled 1,854. During the World War II occupation of Ukraine, the Nazi German occupying forces established a Jewish ghetto, where nearly 3000 Jews were killed. In 1960, Stepan acquired the status of an urban-type settlement. On 26 January 2024, a new law entered into force which abolished this status, and Stepan became a rural settlement. People from Stepan * Stanisław Gabriel Worcell (1799–1857), socialist Polish revolutionary See also * Klesiv Klesiv (; ) is a rural settlement in Sarny Raion (district) of Rivne Oblast ( province) in western Ukrain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Asia
East Asia is a geocultural region of Asia. It includes China, Japan, Mongolia, North Korea, South Korea, and Taiwan, plus two special administrative regions of China, Hong Kong and Macau. The economies of Economy of China, China, Economy of Japan, Japan, Economy of South Korea, South Korea, and Economy of Taiwan, Taiwan are among the world's largest and most prosperous. East Asia borders North Asia to the north, Southeast Asia to the south, South Asia to the southwest, and Central Asia to the west. To its east is the Pacific Ocean. East Asia, especially History of China, Chinese civilization, is regarded as one of the earliest Cradle of civilization#China, cradles of civilization. Other ancient civilizations in East Asia that still exist as independent countries in the present day include the History of Japan, Japanese, History of Korea, Korean, and History of Mongolia, Mongolian civilizations. Various other civilizations existed as independent polities in East Asia in the past ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Fish
Freshwater fish are fish species that spend some or all of their lives in bodies of fresh water such as rivers, lakes, ponds and inland wetlands, where the salinity is less than 1.05%. These environments differ from marine habitats in many ways, especially the difference in levels of osmolarity. To survive in fresh water, fish need a range of physiological adaptations. 41.24% of all known species of fish are found in fresh water. This is primarily due to the rapid speciation that the scattered habitats make possible. When dealing with ponds and lakes, one might use the same basic models of speciation as when studying island biogeography. Physiology Freshwater fish differ physiologically from saltwater fish in several respects. Their gills must be able to diffuse dissolved gases while keeping the electrolytes in the body fluids inside. Their scales reduce water diffusion through the skin: freshwater fish that have suffered too much scale loss will die. They also have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray-finned Fish
Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of skin supported by radially extended thin bony spines called '' lepidotrichia'', as opposed to the bulkier, fleshy lobed fins of the sister clade Sarcopterygii (lobe-finned fish). Resembling folding fans, the actinopterygian fins can easily change shape and wetted area, providing superior thrust-to-weight ratios per movement compared to sarcopterygian and chondrichthyian fins. The fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the articulation between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). The vast majority of actinopterygians are teleosts. By species count, they dominate the subphylum Vertebrata, and constitute nearly 99% of the over 30,000 extant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Culter (fish)
''Culter'' is a genus of freshwater ray-finned fishes belonging to the family Xenocyprididae, the East Asian minnows or sharpbellies. The fishes in this genus are found in eastern Asia from Siberia to Viet Nam. The name is derived from the Latin word ''culter'', meaning "knife". ''Culter'' is closely related to ''Chanodichthys ''Chanodichthys'' is a genus of freshwater ray-finned fishes belonging to the family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other ...'' and some species have been moved between these genera. Species ''Culter'' has the following species classified within it: * '' Culter alburnus'' Basilewsky, 1855 * '' Culter compressocorpus'' P. L. Yih & C. R. Chu, 1959 References Xenocyprididae Taxa named by Stepan Ivanovich Basilewsky Ray-finned fish genera {{Cultrinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family (, : ) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xenocyprididae
Xenocyprididae, is a family of freshwater ray-finned fishes commonly called the East Asian minnows or sharpbellies with a natural distribution in Asia. This taxon, sometimes spelt Xenocypridae, was previously regarded to be a subfamily, Xenocyprinae, of the family Cyprinidae. Cyprinidae '' sensu lato'' is now divided into a number of smaller families within the suborder Cyprinoidei, in the order Cypriniformes. Genera Xenocyprididae contains the following valid genera: A potential fossil genus of the Xenocyprinae is '' Planktophaga'' from the middle-late Eocene of Vietnam. Although initially classified under the East Asian group of Leuciscinae ''sensu lato'' (as ''Hypophthalmichthys'' was previously classified under it), it has unique pharyngeal teeth only shared with ''Hypophthalmichthys'', and thus may represent a basal member of the group. Fossil teeth of indeterminate xenocyprines were found from the same site. Taxonomy Xenocyprididae was previously considered to be a part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Buir
Buir Lake (; ) is a freshwater lake that straddles the border between Mongolia and China. It lies within the Buir Lake Depression. The Chinese city of Hulunbuir is named after both this lake and Hulun Lake, which lies entirely on the Chinese side of the border in Inner Mongolia Inner Mongolia, officially the Inner Mongolia Autonomous Region, is an Autonomous regions of China, autonomous region of China. Its border includes two-thirds of the length of China's China–Mongolia border, border with the country of Mongolia. .... In 1388, Ming forces under Lan Yu won a major victory over the Northern Yuan on the Buir Lake region. Northern Yuan ruler Tögüs Temür tried to escape but was killed shortly afterwards.The Mongol empire & its legacy, by Reuven Amitai-Preiss, David Morgan, pg 293 It is currently the only place where Mongolian navy is useful and patrols, with a small number of motorboats used by border guards. Indeed, Mongolia has no navy due to its landlocked status, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onon River
The Onon is a river in Mongolia and Russia. It is long, and has a drainage basin of .Онон Course It originates at the eastern slope of the Khentii Mountains. For 298 km it flows within Mongolia, before entering the Khentei-Daur Highlands region of the flowing along the[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kherlen River
Kherlen River (also known as Kerülen; ; ) is a 1,254 km river in Mongolia and China. It is also one of the two longest rivers in Mongolia, along with the Orkhon River. Course The river originates in the south slopes of the Khentii mountains, near the Burkhan Khaldun mountain in the Khan Khentii Strictly Protected Area, about northeast of Ulaanbaatar. This area constitutes the divide between the Arctic ( Tuul River) and Pacific (Kherlen, Onon) basins and is consequently named "Three River Basins". From there the Kherlen flows in a mostly eastern direction through the Khentii ''aimag''. Further downriver, it crosses the eastern Mongolian steppe past Ulaan Ereg and Choibalsan, entering China at and emptying into Hulun Nuur after another . The mean streamflow of Kherlen River has decreased by more than a half from 2000 to 2008 when compared with prior decades. Kherlen-Ergune-Amur In years with high precipitation, the normally exitless Hulun Lake may overflow at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
