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Balkhash Perch
The Balkhash perch (''Perca schrenkii'') is a species of perch endemic to the Lake Balkhash and Lake Alakol watershed system, which lies mainly in Kazakhstan. It is similar to the other two species of perch, and grows to a comparable size, but has a slimmer build and is lighter in colour. It has suffered a population decline which is blamed on introduced bream and predatory fish such as the Volga pikeperch. Discovery and first scientific description An expedition of Alexander von Schrenk to eastern Turkestan collected this species in 1842, and deposited preserved specimens at the Imperial Academy of Sciences in St. Petersburg; Karl Kessler's formal description was published much later, in 1874, after the rediscovered specimens were sent to him by Alexander Strauch. The description was included in an article on fishes collected by the later expedition to Turkestan of Alexei Pavlovich Fedchenko.Mamilov p. 71 The fish is named in honor of Alexander von Schrenck (1816–1876) the Bal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Kessler
Karl Fedorovich Kessler (19 November 1815 – 3 March 1881) was a German-Russian zoologist and author of zoological taxa signed ''Kessler'', who was mostly active in Kyiv, Ukraine. He conducted most of his studies of birds in Ukrainian regions of the Russian Empire: Kiev Governorate, Volyn Governorate, Kherson Governorate, Poltava Governorate and Bessarabia. He also studied the fish of the Dniester, Dnieper, and Southern Bug rivers, and on the Ukrainian coast of the Black Sea. Kessler was one of the first zoologists to propose that mutual aid, rather than mutual struggle, was the main factor in the evolution of a species. The anarchist Peter Kropotkin later developed this theory in his book '' Mutual Aid: A Factor of Evolution''. Tribute The Kessler's gudgeon ''(Romanogobio kesslerii)'' was named after him. See also * :Taxa named by Karl Kessler *Antoine Laurent Apollinaire Fée *Jean-Charles Houzeau *Alphonse Toussenel Alphonse Toussenel (March 17, 1803 – April 30, 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FishBase
FishBase is a global species database of fish species (specifically finfish). It is the largest and most extensively accessed online database on adult finfish on the web.Marine Fellow: Rainer Froese ''Pew Environment Group''. Over time it has "evolved into a dynamic and versatile ecological tool" that is widely cited in scholarly publications. FishBase provides comprehensive species data, including information on , geographical distribution, and |
Fish Described In 1874
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Most fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Karl Kessler
In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's system in '' Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Fish Of China
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include non- salty mineral-rich waters such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Fresh water is the water resource that is of the most and immediate use to humans. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of higher plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Of Central Asia
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perch
Perch is a common name for fish of the genus ''Perca'', freshwater gamefish belonging to the family Percidae. The perch, of which three species occur in different geographical areas, lend their name to a large order of vertebrates: the Perciformes, from the el, πέρκη (), simply meaning perch, and the Latin ''forma'' meaning shape. Many species of freshwater gamefish more or less resemble perch, but belong to different genera. In fact, the exclusively saltwater-dwelling red drum is often referred to as a red perch, though by definition perch are freshwater fish. Though many fish are referred to as perch as a common name, to be considered a true perch, the fish must be of the family Percidae. The type species for this genus is the European perch, ''P. fluviatilis''. Species Most authorities recognize three species within the perch genus: * The European perch (''P. fluviatilis'') is primarily found in Europe, but a few can also be found in South Africa, and even as far ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Deficient
A data deficient (DD) species is one which has been categorized by the International Union for Conservation of Nature (IUCN) as offering insufficient information for a proper assessment of conservation status to be made. This does not necessarily indicate that the species has not been extensively studied; but it does indicate that little or no information is available on the abundance and distribution of the species. The IUCN recommends that care be taken to avoid classing species as "data deficient" when the absence of records may indicate dangerously low abundance: "If the range of a taxon is suspected to be relatively circumscribed, if a considerable period of time has elapsed since the last record of the taxon, threatened status may well be justified""The Categories," in IUCN (1983). (see also precautionary principle). See also * IUCN Red List data deficient species * List of data deficient amphibians * IUCN Red List data deficient species (Annelida) * List of data deficien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bream
Bream ( ) are species of freshwater and marine fish belonging to a variety of genera including ''Abramis'' (e.g., ''A. brama'', the common bream), ''Acanthopagrus'', '' Argyrops'', ''Blicca'', '' Brama'', ''Chilotilapia'', '' Etelis'', ''Lepomis'', ''Gymnocranius'', '' Lethrinus'', ''Nemipterus'', ''Pharyngochromis'', ''Rhabdosargus'', ''Scolopsis'', or ''Serranochromis''. Although species from all of these genera are called "bream", the term does not imply a degree of relatedness between them. Fish termed "bream" tend to be narrow, deep-bodied species. The name is a derivation of the Middle English word ''breme'', of Old French origin. The term sea bream is sometimes used for gilt-head bream (''Sparus aurata''), (''orata'' in Italy, ''dorada'' in Spain) or porgies (both family Sparidae) or pomfrets (family Bramidae) . See also * Porgie fishing * Bluegill The bluegill (''Lepomis macrochirus''), sometimes referred to as "bream", "brim", "sunny", or "copper nose" as is c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chu River
The Chu (Shu or Chüy) ( kk, Шу, Shu, شۋ; ky, Чүй, Chüy, چۉي; dng, Чў, Chwu (from , ''Chǔ''); russian: Чу, Chu) is a river in Northern Kyrgyzstan and Southern Kazakhstan. Of its total length of ,Чу (река) the first 115 kilometres are in Kyrgyzstan, then for 221 kilometres the river is the border between Kyrgyzstan and Kazakhstan and the last 731 kilometres are in Kazakhstan. It is one of the longest s in Kyrgyzstan and in Kazakhstan. It has a drainage basin of . The |
Nura River
The Nura ( kk, Нұра, ''Nura''; russian: Нура) is a major watercourse of northeast-central Kazakhstan. It is long and drains an area of . Course The river rises in the Kyzyltas mountains, a subrange of the Kazakh Uplands and flows initially north-northwestwards for about . It then turns to the west and flows in that direction for , then southwest for . The Nura turns north near Esengeldi for about , eventually turning southwest as it draws close to Nur-Sultan near the river Irtysh. From there, it flows southwest for almost , through a series of lakes, finally ending in the endorheic Lake Tengiz. The river's largest tributaries are the Sherubainura, Ulkenkundyzdy, and Akbastau rivers. It is heavily used for irrigation and municipal water supply. The average discharge at the mouth is . The Irtysh–Karaganda Canal crosses the Nura at , in what appears to be a tunnel. Some of the canals water is directed into the Nura (a chute below the dam at ), replenishing this river. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurice Kottelat
Maurice Kottelat (born 16 July 1957 in Delémont, SwitzerlandCommissioners: Dr Maurice Kottelat International Commission on Zoological Nomenclature (accessed 2014)) is a specializing in Eurasian freshwater fishes. Kottelat obtained a License in Sciences at the in 1987(outdated link: [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
