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Deuterodon Oyakawai
''Deuterodon oyakawai'' is a small species of characin endemic to a large river basin along the Atlantic coast in southeast Brazil. It was originally one of three members of the genus ''Probolodus'', but ''Probolodus'' is now considered obsolete, synonymized with '' Deuterodon''. Much like other members of ''Deuterodon'', and like some species in related genera, ''D. oyakawai'' is a small, silvery fish with fins in some combination of red and clear. It has a defined humeral spot that can be used for identification. Upon its nomination, congener '' Deuterodon heterostomus'' was considered the only member of the genus ''Probolodus'', but ''D. oyakawai'' (and '' D. sazimai'') were established therein in 2014. Prior to this, specimens of ''D. oyakawai'' were likely mislabeled as ''D. heterostomus''. All three species were moved to the genus ''Deuterodon'' upon a phyletic review in 2020. All three species are also noted to perform lepidophagy, which is a specialized feeding behavior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazil
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area and the seventh most populous. Its capital is Brasília, and its most populous city is São Paulo. The federation is composed of the union of the 26 states and the Federal District. It is the largest country to have Portuguese as an official language and the only one in the Americas; one of the most multicultural and ethnically diverse nations, due to over a century of mass immigration from around the world; and the most populous Roman Catholic-majority country. Bounded by the Atlantic Ocean on the east, Brazil has a coastline of . It borders all other countries and territories in South America except Ecuador and Chile and covers roughly half of the continent's land area. Its Amazon basin includes a vast tropical forest, ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deuterodon
''Deuterodon'' is a genus of characins from river basins in southern and southeastern Brazil ( Rio Grande do Sul to Espírito Santo), with a single species of uncertain taxonomic status, ''D. potaroensis'', from Guyana. These are small fish that reach up to in total length. They are omnivores with a specialized mouth structure that allows them to scrape algae and debris off bedrock. Species formerly considered members of the genera ''Probolodus'' and ''Myxiops'' are considered to be members of ''Deuterodon'' by modern researchers, following a thorough phyletic review of several characid genera in 2020. Species The following 24 species are recognized in the genus ''Deuterodon'':Silva, P.C.; M.C. Malabarba; L.R. Malabarba (2017)Using ancient DNA to unravel taxonomic puzzles: the identity of ''Deuterodon pedri'' (Ostariophysi: Characidae) Neotrop. ichthyol. 15(1). * ''Deuterodon aphos'' (Zanata & Akama, 2004) * ''Deuterodon burgerai'' (Zanata & Camelier, 2009) * ''Deuterodon git ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humeral Spot
Humeral spot (from Latin ''humerus'', pertaining to the shoulder) is a mark or pattern found on several species of fish, typically above the pectoral fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as .... In insects, the humeral spot may be found on the costal area of the wing. References {{Animal-physiology-stub Humerus Fish physiology Insect physiology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deuterodon Heterostomus
''Deuterodon heterostomus'' is a small species of characin endemic to a large river system in southeast Brazil. It was originally the only member of the genus ''Probolodus'', but ''Probolodus'' is now considered obsolete, synonymized with ''Deuterodon''. Much like other members of ''Deuterodon'', and like some fish in related genera, ''D. heterostomus'' is a small, silvery fish with fins in some combination of red and clear. It has a defined humeral spot that can be used for identification. Its diet was not well-known until a 1970 study that classified it as a voracious lepidophage, preying on other fish species for their scales. Most of its food is sourced from related fishes such as ''Psalidodon fasciatus'', a cryptic species to which ''D. heterostomus'' bears a strong visual resemblance. This resemblance has been proposed to be a form of mimicry, allowing ''D. heterostomus'' to easily approach its prey. Taxonomy When originally described by German-American ichyhtologist Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deuterodon Sazimai
''Deuterodon sazimai'' is a small freshwater fish endemic to a handful of river basins in southeastern Brazil. Upon being first described, it was considered a member of genus ''Probolodus''; ''Probolodus'' is now considered obsolete, synonymized with '' Deuterodon''. Much like other members of ''Deuterodon'', and like some species in related genera like '' Astyanax'' or ''Jupiaba'', ''D. oyakawai'' is a silvery fish with fins in some combination of red and clear. It sports a wedge-shaped humeral spot, and an oval-shaped blotch on its tail joint. This species demonstrates lepidophagy, or scale-eating, which is not uncommon in closely related congeners. Its most likely targets include other members of ''Deuterodon''. Its diet is occasionally supplemented by leaves and insects, though these are rare additions. Further details, regarding aspects such as behavior and biotope preferences, are sparse. Taxonomy ''Deuterodon sazimai'' was originally described as ''Probolodus sazimai'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidophagy
Lepidophagy is a specialised feeding behaviour in fish that involves eating the scales of other fish. Lepidophagy is widespread, having evolved independently in at least five freshwater families and seven marine families. A related feeding behavior among fish is pterygophagy: feeding on the fins of other fish. Species Lepidophagy, or scale-eating, has been reported in a range of fish, including: '' Chanda nama'' (family Ambassidae), '' Plagiotremus'' (family Blenniidae), '' Terapon jarbua'' (family Terapontidae), a few '' Ariopsis'' and '' Neoarius'' species (family Ariidae), Pachypterus khavalchor (family Pachypteridae), Macrorhamphoides uradoi (family Triacanthodidae), several pencil catfish (family Trichomycteridae), some piranha, ''Exodon paradoxus'', '' Probolodus'', '' Roeboides'' and '' Roeboexodon'' species (order Characiformes), '' Cyprinodon desquamator'' (family Cyprinodontidae), along with both '' Perissodus'' species, all four '' Plecodus'' species, '' Xenoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribeira De Iguape River
The Ribeira de Iguape River ( pt, Rio Ribeira de Iguape), or simply the Ribeira River ( pt, Rio Ribeira), is a river of Paraná and São Paulo states in southeastern Brazil. It flows into the Atlantic Ocean near Iguape. The river is home to several endemic species of fish. So far no dams have been built on the river, although four have been proposed. Although it flows through a relatively sparsely populated region with untouched areas of Atlantic Forest, the river has been contaminated with heavy metals from mining beyond the point where it is considered safe to eat the molluscs found in the river and its estuary. Course The Ribeira de Iguape River is long, and is the largest in São Paulo to have no dams along its length. It forms at the confluence of the Ribeirinha River and the Açunguí River in the state of Paraná less than from Curitiba. The elevation at its origin is about . The main source is in the Campos Gerais National Park. About of the river is in the state ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Length
Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. Simply put, this measurement excludes the length of the caudal (tail) fin. * Total length (TL) is the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. Standard length measurements are used with Teleostei (most bony fish), while total length measurements are used with Myxini (hagfish), Petromyzontiformes (lampreys), and (usually) Elasmobranchii (shark Sharks are a group of elasmobranch fish characterize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guanine
Guanine () (symbol G or Gua) is one of the four main nucleobases found in the nucleic acids DNA and RNA, the others being adenine, cytosine, and thymine ( uracil in RNA). In DNA, guanine is paired with cytosine. The guanine nucleoside is called guanosine. With the formula C5H5N5O, guanine is a derivative of purine, consisting of a fused pyrimidine- imidazole ring system with conjugated double bonds. This unsaturated arrangement means the bicyclic molecule is planar. Properties Guanine, along with adenine and cytosine, is present in both DNA and RNA, whereas thymine is usually seen only in DNA, and uracil only in RNA. Guanine has two tautomeric forms, the major keto form (see figures) and rare enol form. It binds to cytosine through three hydrogen bonds. In cytosine, the amino group acts as the hydrogen bond donor and the C-2 carbonyl and the N-3 amine as the hydrogen-bond acceptors. Guanine has the C-6 carbonyl group that acts as the hydrogen bond acceptor, while a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidophagy
Lepidophagy is a specialised feeding behaviour in fish that involves eating the scales of other fish. Lepidophagy is widespread, having evolved independently in at least five freshwater families and seven marine families. A related feeding behavior among fish is pterygophagy: feeding on the fins of other fish. Species Lepidophagy, or scale-eating, has been reported in a range of fish, including: '' Chanda nama'' (family Ambassidae), '' Plagiotremus'' (family Blenniidae), '' Terapon jarbua'' (family Terapontidae), a few '' Ariopsis'' and '' Neoarius'' species (family Ariidae), Pachypterus khavalchor (family Pachypteridae), Macrorhamphoides uradoi (family Triacanthodidae), several pencil catfish (family Trichomycteridae), some piranha, ''Exodon paradoxus'', '' Probolodus'', '' Roeboides'' and '' Roeboexodon'' species (order Characiformes), '' Cyprinodon desquamator'' (family Cyprinodontidae), along with both '' Perissodus'' species, all four '' Plecodus'' species, '' Xenoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic Forest
The Atlantic Forest ( pt, Mata Atlântica) is a South American forest that extends along the Atlantic coast of Brazil from Rio Grande do Norte state in the northeast to Rio Grande do Sul state in the south and inland as far as Paraguay and the Misiones Province of Argentina, where the region is known as Selva Misionera. The Atlantic Forest has ecoregions within the following biome categories: seasonal moist and dry broad-leaf tropical forests, tropical and subtropical grasslands, savannas, and shrublands, and mangrove forests. The Atlantic Forest is characterized by a high biodiversity and endemism. It was the first environment that the Portuguese colonists encountered over 500 years ago, when it was thought to have had an area of , and stretching an unknown distance inland, making it, back then, the second largest rainforest on the planet, only behind the Amazon rainforest. Over 85% of the original area has been deforested, threatening many plant and animal species with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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