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Pleurodeles
''Pleurodeles'' is a genus of three species, the ribbed newts: The Iberian ribbed newt is the most common of the species, and the most frequently used as a model organism by scientists. However, its numbers in the wild are declining, and in 2006 it became a near threatened species. The other two species are in fact threatened, with ''P. nebulosus'' considered vulnerable species, vulnerable to extinction and ''P. poireti'' classified as an endangered species. The numbers of all three species are declining in the wild. Livestock agriculture is an ongoing major cause of habitat loss and degradation, and of water pollution, for all three species. References Newts Amphibian genera Taxa named by Karl Michahelles {{Salamandridae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iberian Ribbed Newt
The Iberian ribbed newt, gallipato or Spanish ribbed newt (''Pleurodeles waltl'') is a newt endemic to the central and southern Iberian Peninsula and Morocco. It is the largest European newt species and it is also known for its sharp ribs which can puncture through its sides, and as such is also called the sharp-ribbed newt. This species should not be confused with the different species with similar common name, the Iberian newt (''Lissotriton boscai''). Description The Iberian ribbed newt has tubercles running down each side. Through these, its sharp ribs can puncture. The ribs act as a defense mechanism, causing little harm to the newt. This mechanism could be considered as a primitive and rudimentary system of envenomation, but is completely harmless to humans. At the same time as pushing its ribs out the newt begins to secrete poison from special glands on its body. The poison coated ribs create a highly effective stinging mechanism, injecting toxins through the thin skin i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurodeles Waltl
The Iberian ribbed newt, gallipato or Spanish ribbed newt (''Pleurodeles waltl'') is a newt endemic to the central and southern Iberian Peninsula and Morocco. It is the largest European newt species and it is also known for its sharp ribs which can puncture through its sides, and as such is also called the sharp-ribbed newt. This species should not be confused with the different species with similar common name, the Iberian newt (''Lissotriton boscai''). Description The Iberian ribbed newt has tubercles running down each side. Through these, its sharp ribs can puncture. The ribs act as a defense mechanism, causing little harm to the newt. This mechanism could be considered as a primitive and rudimentary system of envenomation, but is completely harmless to humans. At the same time as pushing its ribs out the newt begins to secrete poison from special glands on its body. The poison coated ribs create a highly effective stinging mechanism, injecting toxins through the thin skin i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurodeles Waltl07
''Pleurodeles'' is a genus of three species, the ribbed newts: The Iberian ribbed newt is the most common of the species, and the most frequently used as a model organism by scientists. However, its numbers in the wild are declining, and in 2006 it became a near threatened species. The other two species are in fact threatened, with ''P. nebulosus'' considered vulnerable to extinction and ''P. poireti'' classified as an endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv .... The numbers of all three species are declining in the wild. Livestock agriculture is an ongoing major cause of habitat loss and degradation, and of water pollution, for all three species. References Newts Amphibian genera Taxa named by Karl Michahelles {{Salamandridae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurodeles Nebulosus
The Algerian ribbed newt (''Pleurodeles nebulosus'') is a species of salamander in the family Salamandridae found in Algeria and Tunisia. The natural habitats of this newt are rivers, intermittent rivers, swamps, cisterns, freshwater marshes, intermittent freshwater marshes, and ponds. It is threatened by habitat destruction. Taxonomy Formerly, this species was confused with ''Pleurodeles poireti''. Carranza and Wade (2004) found out that most North African ''Pleurodeles'' species that had previously been referred to as ''P. poireti'' were in fact ''Pleurodeles nebulosus'', an altogether different species. The true ''P. poireti'' newts are found only on the Edough Massif, in northeast Algeria. Description The Algerian ribbed newt is a medium-sized species growing to a length of about . The head is flattened and has small eyes and a rounded snout. The body is somewhat flattened and the tail of the male is longer than that of the female. In the breeding season, fins grow above and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newts
A newt is a salamander in the subfamily Pleurodelinae. The terrestrial juvenile phase is called an eft. Unlike other members of the family Salamandridae, newts are semiaquatic, alternating between aquatic and terrestrial habitats. Not all aquatic salamanders are considered newts, however. More than 100 known species of newts are found in North America, Europe, North Africa and Asia. Newts metamorphose through three distinct developmental life stages: aquatic larva, terrestrial juvenile (eft), and adult. Adult newts have lizard-like bodies and return to the water every year to breed, otherwise living in humid, cover-rich land habitats. Newts are threatened by habitat loss, fragmentation and pollution. Several species are endangered, and at least one species, the Yunnan lake newt, has become extinct recently. Etymology The Old English name of the animal was , (of unknown origin), resulting in Middle English ; this word was transformed irregularly into , , or . The initial "n" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurodeles Poireti
''Pleurodeles poireti'', the Edough ribbed newt or Poiret's newt, is a species of salamander in the family Salamandridae. It is found only in the Edough Massif, in the north east of Algeria. The natural habitats are of these newts are rivers, intermittent rivers, swamps, freshwater marshes, intermittent freshwater marshes, cisterns and ponds. They are threatened by habitat loss Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby .... The true ''P. poireti'' newts are restricted to the Edough Massif area, in Numidia. Formerly, this species was confused with the Algerian ribbed newt ''Pleurodeles nebulosus'', which has a much wider distribution. References External links Algerian Newt at www.amphibiaweb.orgLink to photo Newts Amphibians of North Africa Endemic fauna of Alger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edough Ribbed Newt (Pleurodeles Poireti)
''Pleurodeles poireti'', the Edough ribbed newt or Poiret's newt, is a species of salamander in the family Salamandridae. It is found only in the Edough Massif, in the north east of Algeria. The natural habitats are of these newts are rivers, intermittent rivers, swamps, freshwater marshes, intermittent freshwater marshes, cisterns and ponds. They are threatened by habitat loss. The true ''P. poireti'' newts are restricted to the Edough Massif area, in Numidia Numidia ( Berber: ''Inumiden''; 202–40 BC) was the ancient kingdom of the Numidians located in northwest Africa, initially comprising the territory that now makes up modern-day Algeria, but later expanding across what is today known as Tunis .... Formerly, this species was confused with the Algerian ribbed newt ''Pleurodeles nebulosus'', which has a much wider distribution. References External links Algerian Newt at www.amphibiaweb.orgLink to photo Newts Amphibians of North Africa Endemic fauna of Algeria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Michahelles
Georg Christian Karl Wilhelm Michahelles (5 May 1807, Nuremberg – 15 August 1834, Nafplio, Nauplia) was a German zoology, zoologist and physician originally from Bavaria. From 1827, he studied medicine at the University of Munich, where he made the acquaintance of naturalist Lorenz Oken. In 1831 he received his doctorate of medicine and surgery with the thesis ''Das Malo Di Scarlievo in Historischer Und Pathologischer Hinsicht''.Saecular-Feier der Naturhistorischen Gesellschaft in Nürnberg 1801-1901 ... (Google Books) by Naturhistorische Gesellschaft Nürnberg Michahelles travelled extensively in Dalmatia, Kingdom of Illyria (1816–49), Illyria and Croatia, becoming well known for his study of the birds of the area. He died after being affected with dysentery in G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Model Organism
A model organism (often shortened to model) is a non-human species that is extensively studied to understand particular biological phenomena, with the expectation that discoveries made in the model organism will provide insight into the workings of other organisms. Model organisms are widely used to research human disease when human experimentation would be unfeasible or unethical. This strategy is made possible by the common descent of all living organisms, and the conservation of metabolic and developmental pathways and genetic material over the course of evolution. Studying model organisms can be informative, but care must be taken when generalizing from one organism to another. In researching human disease, model organisms allow for better understanding the disease process without the added risk of harming an actual human. The species chosen will usually meet a determined taxonomic equivalency to humans, so as to react to disease or its treatment in a way that resembles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Near Threatened
A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify for the threatened status. The IUCN notes the importance of re-evaluating near-threatened taxon at appropriate intervals. The rationale used for near-threatened taxa usually includes the criteria of vulnerable which are plausible or nearly met, such as reduction in numbers or range. Near-threatened species evaluated from 2001 onwards may also be ones which are dependent on conservation efforts to prevent their becoming threatened, whereas before this conservation-dependent species were given a separate category ("Conservation Dependent"). Additionally, the 402 conservation-dependent taxa may also be considered near-threatened. IUCN Categories and Criteria version 2.3 Before 2001, the IUCN used the version 2.3 Categories and Criteria ... [...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] |
Endangered Species
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and invasive species. The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas. Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. Some endangered species are the target of extensive conservation efforts such as captive breeding and habitat restoration. Human activity is a significant cause in causing some species to become endangered. Conservation status The conservation status of a species indicates the likelihood that it will become extinct. Multiple factors are considered when assessing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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