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Petitella Bleheri
''Petitella bleheri'' is a species of characin found in Amazon Basin in Brazil and Peru. It is one of three species commonly referred to as the rummy-nose tetra, and is also known as the firehead tetra. Taxonomy and systematics The specific name, ''bleheri'', honors the species’ discoverer, Heiko Bleher. The mitochondrial genome of ''Petitella bleheri'' was fully sequenced in 2015 using standard polymerase chain reaction (PCR) techniques, and found to be 17,021 base pairs long. Distribution and habitat This species is found in the Rio Negro and Rio Meta basins. Diet Omnivorous and will accept just about anything offered. Species does have a small mouth so correspondingly sized foods are best. Feed a mixture of dried flakes and granules and small live and frozen foods. A varied diet such as this is essential for the best colour development. In the aquarium This species is common in the aquarium trade. Between the years of 2006 to 2015, 7,178,906 specimens of ''Petitell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacques Gery
Jacques or Jacq are believed to originate from the Middle Ages in the historic northwest Brittany region in France, and have since spread around the world over the centuries. To date, there are over one hundred identified noble families related to the surname by the Nobility & Gentry of Great Britain & Ireland. Origins The origin of this surname comes from the Latin ' Iacobus', associated with the biblical patriarch Jacob. Ancient history A French knight returning from the Crusades in the Holy Lands probably adopted the surname from "Saint Jacques" (or "James the Greater"). James the Greater was one of Jesus' Twelve Apostles, and is believed to be the first martyred apostle. Being endowed with this surname was an honor at the time and it is likely that the Church allowed it because of acts during the Crusades. Indeed, at this time, the use of biblical, Christian, or Hebrew names and surnames became very popular, and entered the European lexicon. Robert J., a Knight Crusader ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Live Fish Trade
The live fish trade can refer to the live food fish trade (for human consumption) or to the ornamental fish trade (for aquariums). The fish can come from many places, but most comes from Southeast Asia. The live food fish trade is a global system that links fishing communities with markets, primarily in Hong Kong and mainland China. Many of the fish are captured on coral reefs in Southeast Asia or the Pacific Island nations. Consumer demand Within the live food trade there are certain types of fish demanded more often by consumers, particularly smaller and medium-sized fish. According to the book While Stocks Last: The Live Reef Food Fish Trade consumer demand has caused the fish captured on coral reefs to be the most valued fish in the trade. Consumers are important because they are directly purchasing these fish species at restaurants and stores. In addition to these types of fishes, many juvenile fish are used for the live food trade. There are also cultural and regional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Jacques Géry
In biology, a taxon (back-formation from ''taxonomy''; : 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, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). 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 presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Fish Of Peru
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] |
Tetras Of Brazil
Tetra is the common name of many small freshwater characiform fishes. Tetras come from Africa, Central America, and South America, belonging to the biological families Characidae, Alestidae (the "African tetras"), Lepidarchidae, Lebiasinidae, Acestrorhynchidae, Stevardiidae, and Acestrorhamphidae. In the past, all of these families were placed in the Characidae. The Characidae and their allies are distinguished from other fish by the presence of a small adipose fin between the dorsal and caudal fins. Many of these, such as the neon tetra (''Paracheirodon innesi''), are brightly colored and easy to keep in captivity. Consequently, they are extremely popular for home aquaria. ''Tetra'' is no longer a taxonomic, phylogenetic term. It is short for ''Tetragonopterus'', a genus name formerly applied to many of these fish, which is Greek for "square-finned" (literally, four-sided-wing). Because of the popularity of tetras in the fishkeeping hobby, many unrelated fish are comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petitella
''Petitella'' is a genus of freshwater fish in the family Characidae of the order Characiformes. They are all popular tropical fish in the aquarium hobby. They are commonly known as Rummy-nose tetras. Taxonomy and systematics This genus was formerly monotypic, featuring only ''P. georgiae''. The other two species were allocated to ''Hemigrammus ''Hemigrammus'' is a genus of freshwater fish in the family (biology), family Characidae native to South America (including Trinidad) and commonly seen in the aquarium trade. These are medium-small tetras where the largest species reach up to ar ...''. Before the reallocation in 2020, they were distinguished by the following common names: *''P. bleheri'' - Brilliant rummy-nose tetra, or Firehead tetra *''P. georgiae'' - False rummy-nose tetra *''P. rhodostoma'' - Rummy-nose tetra Species There are three recognized species in this genus: References Characiformes genera Characidae Fish described in 1964 {{improv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazonas State (Brazil)
Amazonas () is a state of Brazil, located in the North Region in the north-western corner of the country. It is the largest Brazilian state by area and the ninth-largest country subdivision in the world with an area of 1,570,745.7 square kilometers. It is the largest country subdivision in South America, being greater than the areas of Chile, Paraguay, and Uruguay combined. Neighbouring states are (from the north clockwise) Roraima, Pará, Mato Grosso, Rondônia, and Acre. It also borders the nations of Peru, Colombia and Venezuela. This includes the Departments of Amazonas, Vaupés and Guainía in Colombia, as well as the Amazonas state in Venezuela, and the Loreto Region in Peru. Amazonas is named after the Amazon River, and was formerly part of the Spanish Empire's Viceroyalty of Peru, a region called Spanish Guyana. It was settled by the Portuguese moving northwest from Brazil in the early 18th century and incorporated into the Portuguese empire after the Treaty o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Export
An export in international trade is a good produced in one country that is sold into another country or a service provided in one country for a national or resident of another country. The seller of such goods or the service provider is an ''exporter''; the foreign buyer is an '' importer''. Services that figure in international trade include financial, accounting and other professional services, tourism, education as well as intellectual property rights. Exportation of goods often requires the involvement of customs authorities. Firms For any firm, Global expansion strategies may include: * Franchising, * Turn Key Project, * Export, * Joint Venture, * Licensing, * Creating an owned subsidiary, * Acquisition, * Merger, etc. Exporting is mostly a strategy used by product based companies. Many manufacturing firms begin their global expansion as exporters and only later switch to another mode for serving a foreign market. Barriers There are four main types of expo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Meta
The Meta River is a major left tributary of the Orinoco River in eastern Colombia and southern Venezuela, South America. The Meta originates in the Eastern Ranges of the Andes and flows through the Meta Department, Colombia as the confluence of the Humea, Guatiquía and Guayuriba rivers. It flows east-northeastward across the Llanos Orientales ("Eastern Plains") of Colombia following the direction of the Meta Fault. The Meta forms the northern boundary of Vichada Department, first with Casanare Department, then with Arauca Department, and finally with Venezuela, down to Puerto Carreño where it flows into the Orinoco. The Meta River is long and its drainage basin is . The Meta divides the Colombian Llanos in two different parts: the western portion on the left bank is more humid, receives the relatively nutrient-rich sediments from the Andean mountain range and therefore soils and tributaries are also nutrient-rich, while the eastern portion, ''high plain'' or ''altillanura'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volker Mahnert
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Rio Negro (Amazon)
The Rio Negro ( "''Black River''"), or Guainía as it is known in its upper part, is the largest left tributary of the Amazon River (accounting for about 14% of the water in the Amazon basin), the largest blackwater river in the world, and one of the world's ten List of rivers by discharge, largest rivers by average discharge. Despite its high flow, the Rio Negro has a low Stream load, sediment load (5.76 million tonnes per year on average in Manaus). Geography Upper course The source of the Rio Negro lies in Colombia, in the Department of Guainía where the river is known as the ''Guainía River''. The young river generally flows in an east-northeasterly direction through the Puinawai Natural Reserve, Puinawai National Reserve, passing several small indigenous settlements on its way, such as Cuarinuma, Brujas, Santa Rosa and Tabaquén. After roughly the river starts forming the border between Colombia's Department of Guainía and Venezuela's Amazonas (Venezuelan state), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Base Pairs
A base pair (bp) is a fundamental unit of double-stranded nucleic acids consisting of two nucleobases bound to each other by hydrogen bonds. They form the building blocks of the DNA double helix and contribute to the folded structure of both DNA and RNA. Dictated by specific hydrogen bonding patterns, "Watson–Crick" (or "Watson–Crick–Franklin") base pairs (guanine–cytosine and adenine–thymine) allow the DNA helix to maintain a regular helical structure that is subtly dependent on its nucleotide sequence. The complementary nature of this based-paired structure provides a redundant copy of the genetic information encoded within each strand of DNA. The regular structure and data redundancy provided by the DNA double helix make DNA well suited to the storage of genetic information, while base-pairing between DNA and incoming nucleotides provides the mechanism through which DNA polymerase replicates DNA and RNA polymerase transcribes DNA into RNA. Many DNA-binding proteins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
