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Gambusia
''Gambusia'' is a large genus of viviparous fish in the family Poeciliidae (order Cyprinodontiformes). ''Gambusia'' contains over 40 species, most of which are principally found in freshwater habitats, though some species may also be found in brackish or saltwater habitats. The type species is the Cuban gambusia, ''G. punctata''. The greatest species richness is in Mexico, Texas, and the Greater Antilles, but species are also found elsewhere in the eastern and southern United States, the Bahamas, Central America, and Colombia. ''Gambusia'' species are often called topminnows, or simply gambusias; they are also known as mosquitofish, which, however, refers more specifically to two species, '' G. affinis'' and '' G. holbrooki'', which are often introduced into ponds to eat mosquito larvae. As a consequence, they have been introduced widely outside their native range, and frequently become invasive, threatening local species. They are only occasionally kept in aquariums, due to thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Marcos Gambusia
The San Marcos gambusia (''Gambusia georgei'') is an extinct species of gambusia from the family Poeciliidae that was found only in the San Marcos Springs of Central Texas. The fish has not been seen since 1983. The specific name of this fish honors the American ichthyologist George S. Myers (1905-1985). Description The San Marcos gambusia was typically less than 1.6 inches (4 cm) in length. It had a dark body with a slight blue tint, although the median fins were lemon yellow. The scales were strongly crosshatched, and the dorsal fin had a dark stripe along its edge. The species’ exact diet is not known, but other poeciliids typically eat insect larvae and other small invertebrates. The fish were live bearing and have been known to give birth to a few dozen young at a time. Habitat The San Marcos gambusia has only been identified in a 0.6-mile (1-km) stretch of the headwaters of the San Marcos River. They appeared to need clean and clear water, with little temp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gambusia Affinis
The western Mosquitofish (''Gambusia affinis'') is a North American freshwater fish, also known commonly, if ambiguously, as simply Mosquitofish or by its genus, generic name, ''Gambusia'', or by the common name gambezi. Its sister species, the eastern mosquitofish (''Gambusia holbrooki'') is also referred to by these names. Mosquitofish are small in comparison to many other freshwater fish, with females reaching a maximum length of and males a maximum length of . The female can be distinguished from the male by her larger size and a gravid spot at the posterior of her abdomen. The name "Mosquitofish" was given because the fish eats mosquito larvae, and has been used more than any other fishes for the biological control of mosquitoes. Gambusia typically eat zooplankton, beetles, Mayfly, mayflies, Caddisfly, caddisflies, mites, and other invertebrates; mosquito larvae make up only a small portion of their diet. Mosquitofish were introduced directly into ecosystems in many part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gambusia Holbrooki
The eastern mosquitofish (''Gambusia holbrooki'') is a species of freshwater fish, closely related to the western mosquitofish, ''Gambusia affinis''. It is a member of the family Poeciliidae of order Cyprinodontiformes. The eastern mosquitofish is native to the eastern and southern United States from Florida to Pennsylvania and inland to Alabama and Tennessee, while the western mosquitofish has a larger distribution throughout the United States. Description The Eastern mosquitofish is a small, light-colored fish with semitransparent fins. The females usually have a black stripe near their eye area and light spots can be seen on the caudal and dorsal fins of both sexes. Due to its similar size, shape, and reproductive habits, it can easily be mistaken for a guppy. Generally, males reach and females . These fish are a livebearer species, and as such, the females are larger and more rounded than the males. Pregnant females are also easily recognizable by their gravid spot; a darke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gambusia Alvarezi
The yellowfin gambusia (''Gambusia alvarezi'') is a species of fish in the family Poeciliidae. It is endemic to the Rio Conchos of Chihuahua, Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ..., where it is known as ''guayacon de san gregorio''. This species was described in 1957 by Clark Hubbs and Victor G. Springer with the type locality given as El Ojo de San Gregorio in Chihuahua. The specific name of this fish honours the Mexican ichthyologist José Alvarez del Villar (1903-1986) for his work on the fishes of Mexico and for his assistance to Clark and Springer. References Gambusia Freshwater fish of Mexico Fish described in 1957 Taxa named by Clark Hubbs Taxa named by Victor G. Springer Taxonomy articles created by Polbot {{Cyprinodontiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amistad Gambusia
The Amistad gambusia (''Gambusia amistadensis'') is an extinct species of small fish known only from a single locality, the large vegetated Goodenough Spring in Val Verde County, Texas. It apparently was driven to extinction in the wild when its habitat was submerged to a depth of about 70 feet by the construction of the Amistad Reservoir in 1968. The two captive populations, at the University of Texas System and the Dexter National Fish Hatchery in New Mexico, later failed through hybridization with the related mosquitofish and predation. The species has been classified as extinct by the United States Fish and Wildlife Service The United States Fish and Wildlife Service (USFWS or FWS) is an agency within the United States Department of the Interior dedicated to the management of fish, wildlife, and natural habitats. The mission of the agency is "working with othe ... since 1987, and by the IUCN since 2013. References Further reading * Gambusia Fish described ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Widemouth Gambusia
The widemouth gambusia (''Gambusia eurystoma'') is a species of fish in the family Poeciliidae of the order Cyprinodontiformes. It is endemic to Mexico, specifically to the Baños del Azufre (Grijalva River basin) near Teapa, Tabasco. The Baños del Azufre are sulfidic springs that contain high concentrations of toxic hydrogen sulfide (). This prevents most animals from living in them; the only other fish found in the toxic sections of Baños del Azufre is the sulphur molly The sulphur molly (''Poecilia sulphuraria''), locally known as ''molly del Teapa'', is an endangered species of fish in the family Poeciliidae. It is endemic to Mexico, specifically to the Baños del Azufre (Grijalva River basin) near Teapa, Ta ... (''Poecilia sulphuraria'').Tobler; Riesch; García de León; Schlupp; & Plath (2008). ''Two endemic and endangered fishes, Poecilia sulphuraria (Alvarez, 1948) and Gambusia eurystoma Miller, 1975 (Poeciliidae, Teleostei) as only survivors in a small sulphidic h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuban Gambusia
The Cuban gambusia (''Gambusia punctata'') is a species of freshwater fish. It is a member of the family Poeciliidae of order Cyprinodontiformes, and is the type species of its genus. It is native to Cuba, inhabiting primarily stagnant lakes or ponds and slow-moving streams. A carnivorous surface feeder, it occurs in shoals near the shoreline. This species has the terminal, upward-facing mouth typical of surface feeders, and a protruding belly. It is of plain coloration with a dark lateral stripe. Males Male (symbol: ♂) is the sex of an organism that produces the gamete (sex cell) known as sperm, which fuses with the larger female gamete, or ovum, in the process of fertilization. A male organism cannot reproduce sexually without access to ... reach a maximum overall length around 5.5 cm, with females reaching about 8.5 cm. References * * {{Taxonbar, from=Q3753967 Gambusia Live-bearing fish Ovoviviparous fish Fish described in 1854 Gambusia, Cuban F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clark Hubbs
Clark Hubbs (March 15, 1921 – February 3, 2008) was an American ichthyologist who was professor of zoology at the University of Texas from 1963 until he accepted emeritus status in 1991. He was a leading figure in ichthyology in Texas, teaching many students who went on to be renowned in the field, was actively involved in many ichthyological societies and was an editor of scientific journals. Hubbs was also an environmental activist, fighting to conserve freshwater ecosystems. Early life Clark Hubbs was born on March 15, 1921 in Ann Arbor, Michigan. His father was the ichthyologist Carl L. Hubbs and his mother was Laura C. Hubbs. The Hubbs family undertook trips to Arkansas, Florida, and the Great Basin where they collected zoological specimens. He had a brother and two sisters. His brother, Earl, became a biology teacher and his sister, Frances, married the ichthyologist Robert Rush Miller. His other sister, Margaret, died in childhood. Their father set up a system of "allowanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vulnerable Species
A vulnerable species is a species which has been Conservation status, categorized by the International Union for Conservation of Nature as being threatened species, threatened with extinction unless the circumstances that are threatened species, threatening its survival and reproduction improve. Vulnerability is mainly caused by habitat loss or destruction of the species' home. Vulnerable habitat or species are monitored and can become increasingly threatened. Some species listed as "vulnerable" may be common in captivity (animal), captivity, an example being the military macaw. There are currently 5196 animals and 6789 plants classified as Vulnerable, compared with 1998 levels of 2815 and 3222, respectively. Practices such as cryoconservation of animal genetic resources have been enforced in efforts to conserve vulnerable breeds of livestock specifically. Criteria The International Union for Conservation of Nature uses several criteria to enter species in this category. A tax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Dahl
{{disambiguation ...
Georg may refer to: * ''Georg'' (film), 1997 *Georg (musical), Estonian musical * Georg (given name) * Georg (surname) * , a Kriegsmarine coastal tanker See also * George (other) George may refer to: People * George (given name) * George (surname) * George (singer), American-Canadian singer George Nozuka, known by the mononym George * George Washington, First President of the United States * George W. Bush, 43rd President ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Frédéric Girard
Charles Frédéric Girard (8 March 1822 – 29 January 1895) was a French biologist specializing in ichthyology and herpetology. Born in Mulhouse, France, he studied at the College of Neuchâtel, Switzerland, as a student of Louis Agassiz. In 1847, he accompanied Agassiz as his assistant to Harvard University. Three years later, Spencer Fullerton Baird called him to the Smithsonian Institution to work on its growing collection of North American reptiles, amphibians and fishes. He worked at the museum for the next ten years and published numerous papers, many in collaboration with Baird. In 1854, he was naturalized as a U.S. citizen. Besides his work at the Smithsonian, he managed to earn an M.D. from Georgetown University in Washington, D.C. in 1856. In 1859 he returned to France and was awarded the Cuvier Prize by the Institute of France for his work on the North American reptiles and fishes two years later. When the American Civil War broke out, he joined the Confederate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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