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Greek Lamprey
The Greek lamprey (''Caspiomyzon hellenicus'') (also known as the Greek or Macedonia brook lamprey) is a species of jawless fish in the Petromyzontidae family. It is endemic to Greece. Its natural habitats are rivers and freshwater springs. It is threatened by habitat loss. Originally considered a species of the genus ''Eudontomyzon'', later phylogenetic analyses suggested that a placement within ''Caspiomyzon'' was more likely. It is the most endangered species of lamprey, living only in the Strymon and Louros Louros () is a town and a former municipality in the Preveza regional unit, Epirus, Greece. It was the center of a kaza of the Preveza Sanjak under the Ottoman Empire. Since the 2011 local government reform it is part of the municipality Preveza ... river basins. References * Freshwater fish of Europe Fish described in 1982 Endemic fauna of Greece Petromyzontidae Taxonomy articles created by Polbot {{jawless-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vadim Dimitrievitch Vladykov
Vadim (Cyrillic: Вадим) is a Slavic masculine given name derived from the Ruthenian word ''vaditi'' (), meaning ''to blame'' or as a diminutive of Vadimir. ''Dictionary of Russian Names''. : Vadym; : Vadzim. Notable people with the name include: Mononymic *[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat Loss
Habitat destruction (also termed habitat loss or habitat reduction) occurs when a natural habitat is no longer able to support its native species. The organisms once living there have either moved elsewhere, or are dead, leading to a decrease in biodiversity and Abundance (ecology), species numbers. Habitat destruction is in fact the leading cause of biodiversity loss and species extinction worldwide. Humans contribute to habitat destruction through the Exploitation of natural resources, use of natural resources, agriculture, industrial production and urbanization (urban sprawl). Other activities include mining, logging and trawling. Environmental factors can contribute to habitat destruction more indirectly. Geological processes, climate change, introduced species, introduction of invasive species, ecosystem nutrient depletion, water pollution, water and noise pollution are some examples. Loss of habitat can be preceded by an initial habitat fragmentation. Fragmentation and lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Described In 1982
A fish (: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits. Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians. In a break to the long tradition of grouping all fish into a single class (Pisces), modern phylogenetics views fish as a paraphyletic group. Most fish are cold-blooded, their body temperature varying with the surrounding water, though some large active swimmers like white shark and tuna can hold a higher core temperature. Many fish can communicate acoustically with each other, such as during courtship displays. The study of fish is known as ichthyology. The earliest fish appeared during the Cambrian as small filter feeders; they continued to evolve through the Paleozoic, diversifying into many forms. The earliest fish wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Fish Of Europe
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but 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. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of vascular plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh water is the water resource that is of the most and immediate use to humans. Fresh water is not always pot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louros (river)
The Louros () is a river in the Epirus region, in northwestern Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th .... It is long, and its drainage area is . It emerges from the ground in a large spring located immediately north of the village of Vouliasta, in the Ioannina regional unit. It flows south through a canyon, and then a dam followed by a hydroelectric power station. The Louros flows past the town of Filippiada, forming the boundary between Arta regional unit and the Preveza regional unit. The river then veers east into the Preveza regional unit, flowing through the municipality of Louros, named after the river. The Louros then empties into the marshes at the northern end of the Ambracian Gulf. With Strymon River, Louros is one of only two rivers in the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struma River
The Struma or Strymonas (, ; , ) is a river in Bulgaria and Greece. Its ancient name was Strymon (, ). Its drainage area is , of which in Bulgaria, in Greece and the remaining in North Macedonia and Serbia. It takes its source from the Vitosha Mountain in Bulgaria, runs first westward, then southward, forming a number of gorges, enters Greece near the village of Promachonas in eastern Macedonia. In Greece it is the main waterway feeding and exiting from Lake Kerkini, a significant centre for migratory wildfowl. Also in Greece, the river entirely flows in the Serres regional unit into the Strymonian Gulf in Aegean Sea, near Amphipolis. The river's length is (of which in Bulgaria, making it the country's fifth-longest and one of the longest rivers that run solely in the interior of the Balkans. Parts of the river valley belong to a Bulgarian coal-producing area, more significant in the past than nowadays; the southern part of the Bulgarian section is an important wine r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caspiomyzon
''Caspiomyzon'' is a genus of lamprey in the family Petromyzontidae. They are native to Eastern Europe and parts of Western and Central Asia. Two of the three species in the genus are endemic to Greece. Taxonomy Species There are currently three recognized species in this genus: * '' Caspiomyzon graecus'' (Renaud & Economidis, 2010) (validity doubtful, may be junior synonym of ''C. hellenicus'') * '' Caspiomyzon hellenicus'' ( Vladykov, Renaud, Kott & Economidis), 1982 (Greek brook lamprey) * '' Caspiomyzon wagneri'' ( Kessler, 1870) (Caspian lamprey) This was formerly considered a monotypic genus containing only ''C. wagneri'', but phylogenetic studies suggest that ''hellenicus'' and ''graecus'', formerly placed in '' Eudontomyzon'', also belong to this genus. Evolution Phylogenetic studies indicate that they are the most basal members of the family Petromyzontidae, and their lineage diverged from the other genera in the family ('' Petromyzon'' and '' Ichthyomyzon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetic Analyses
In biology, phylogenetics () is the study of the evolutionary history of life using observable characteristics of organisms (or genes), which is known as Computational phylogenetics, phylogenetic inference. It infers the relationship among organisms based on empirical data and observed heritable traits of DNA sequences, protein amino acid sequences, and Morphology (biology), morphology. The results are a phylogenetic tree—a diagram depicting the hypothesis, hypothetical relationships among the organisms, reflecting their inferred evolutionary history. The tips of a phylogenetic tree represent the observed entities, which can be living Taxon, taxa or fossils. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the taxa represented on the tree. An unrooted tree diagram (a network) makes no assumption about directionality of character state transformation, and does not show the origin or "root" of the taxa in questi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eudontomyzon
''Eudontomyzon'' is a genus of lamprey in the family Petromyzontidae. Most species are found in Eastern Europe. Species There are currently five recognized species in this genus: * '' Eudontomyzon danfordi'' Regan, 1911 (Carpathian lamprey) * '' Eudontomyzon mariae'' ( L. S. Berg, 1931) (Ukrainian brook lamprey) * '' Eudontomyzon morii'' L. S. Berg, 1931 (Korean lamprey) * '' Eudontomyzon stankokaramani'' M. S. Karaman ( sr), 1974 (Drin brook lamprey) * '' Eudontomyzon vladykovi'' Oliva Oliva (, ; ) is a Municipalities of Spain, municipality in the Comarques of the Valencian Community, ''comarca'' of Safor in the Valencia (autonomous community), Valencian Community, Spain. To its east lie of coastline and beaches fronting t ... & Zanandrea, 1959 (Danubian brook lamprey) A sixth possible undescribed species, the Ukrainian migratory lamprey, ''Eudontomyzon sp. nov. 'migratory, became extinct in the late 19th century. References Jawless fish genera Taxa name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spring (hydrosphere)
A spring is a natural exit point at which groundwater emerges from an aquifer and flows across the ground surface as surface water. It is a component of the hydrosphere, as well as a part of the water cycle. Springs have long been important for humans as a source of fresh water, especially in arid regions which have relatively little annual rainfall. Springs are driven out onto the surface by various natural forces, such as gravity and Hydrostatics#Hydrostatic pressure, hydrostatic pressure. A spring produced by the emergence of Geothermal activity, geothermally heated groundwater is known as a hot spring. The yield (hydrology), yield of spring water varies widely from a volumetric flow rate of nearly zero to more than for the biggest springs. Formation Springs are formed when groundwater flows onto the surface. This typically happens when the water table reaches above the surface level, or if the terrain depression (geology), depresses sharply. Springs may also be formed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Claude B
Claude may refer to: People and fictional characters * Claude (given name), a list of people and fictional characters * Claude (surname), a list of people * Claude Callegari (1962–2021), English Arsenal supporter * Claude Debussy (1862–1918), French composer * Claude Kiambe (born 2003), Congolese-born Dutch singer * Claude Lévi-Strauss (1908–2009), French anthropologist and ethnologist * Claude Lorrain (c. 1600–1682), French landscape painter, draughtsman and etcher traditionally called just "Claude" in English * Claude Makélélé (born 1973), French football manager * Claude McKay (1890–1948), Jamaican-American writer and poet * Claude Monet (1840–1926), French painter * Claude Rains (1889–1967), British-American actor * Claude Shannon (1916–2001), American mathematician, electrical engineer and computer scientist * Madame Claude (1923–2015), French brothel keeper Fernande Grudet Places * Claude, Texas, a city * Claude, West Virginia, an unincorporated community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River
A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of its course if it runs out of water, or only flow during certain seasons. Rivers are regulated by the water cycle, the processes by which water moves around the Earth. Water first enters rivers through precipitation, whether from rainfall, the Runoff (hydrology), runoff of water down a slope, the melting of glaciers or snow, or seepage from aquifers beneath the surface of the Earth. Rivers flow in channeled watercourses and merge in confluences to form drainage basins, or catchments, areas where surface water eventually flows to a common outlet. Rivers have a great effect on the landscape around them. They may regularly overflow their Bank (geography), banks and flood the surrounding area, spreading nutrients to the surrounding area. Sedime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
