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Pseudobarbus Verloreni
The Verlorenvlei redfin (''Pseudobarbus verloreni'') is a species of barb endemic to the Verlorenvlei River in South Africa. Etymology The Verlorenvlei redfin takes its name from the Verlorenvlei River, its only remaining habitat. Description The species can be distinguished from the related '' P. skeltoni'', '' P. burchelli'', and '' P. burgi'' by two pairs of barbels around the mouth. Upon dissection, it can also be distinguished by the length of its intestine, which is longer (relative to body length) than any other species of ''Pseudobarbus''. Individuals of ''Pseudobarbus verloreni'' grow long. The species has large eyes and a compressed snout. General colouration is golden, with a silver ventral surface. A lateral stripe runs from behind the head to a dark spot on the caudal peduncle. Fins are often red or orange around the base. Reproduction and development The species is believed to spawn between October and December. The lateral band fades as the individual matures ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul H
Paul may refer to: People * Paul (given name), a given name, including a list of people * Paul (surname), a list of people * Paul the Apostle, an apostle who wrote many of the books of the New Testament * Ray Hildebrand, half of the singing duo Paul & Paula * Paul Stookey, one-third of the folk music trio Peter, Paul and Mary * Billy Paul, stage name of American soul singer Paul Williams (1934–2016) * Vinnie Paul, drummer for American Metal band Pantera * Paul Avril, pseudonym of Édouard-Henri Avril (1849–1928), French painter and commercial artist * Paul, pen name under which Walter Scott wrote ''Paul's letters to his Kinsfolk'' in 1816 * Jean Paul, pen name of Johann Paul Friedrich Richter (1763–1825), German Romantic writer Places * Paul, Cornwall, a village in the civil parish of Penzance, United Kingdom * Paul (civil parish), Cornwall, United Kingdom * Paul, Alabama, United States, an unincorporated community * Paul, Idaho, United States, a city * Paul, Nebrask ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eerste River
The Eerste River, located in the Western Cape, South Africa, rises on Dwarsberg 60 km east of Cape Town at the head of Jonkershoek valley. The Eerste River catchment covers the eastern part of the Cape Flats lying to the west of the Hottentots Holland Mountains and south of the Tygerberg where the Kuils River tributary rises east of Kanonkop. The Eerste River is a short river; its length has been given as 40 km. The major tributary, Kuils River, is approximately 30 km long to its point of confluence with the Eerste River. For a significant part of its course, the river flows through the City of Cape Town. A population of the endangered local endemic Berg River Redfin (''Pseudobarbus burgi'') was found in the Eerste River, but may be extinct in this river system. Tributaries From "Rivers and Wetlands of Cape Town", ordered from source to sea: *Jonkershoek River *Plankenbrug River (R) **Klipies River (L) **Kromme River (L) *Veldwachters River (R) *Sanddrif R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Fish Of South Africa
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or becoming ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Fish Of South Africa
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 pota ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Carp
The common carp (''Cyprinus carpio''), also known as European carp, Eurasian carp, or simply carp, is a widespread freshwater fish of eutrophic waters in lakes and large rivers in Europe and Asia.Fishbase''Cyprinus carpio'' Linnaeus, 1758/ref>Arkive The native wild populations are considered Vulnerable species, vulnerable to extinction by the International Union for Conservation of Nature (IUCN), but the species has also been Domestication, domesticated and Introduced species, introduced (see aquaculture) into environments worldwide, and is often considered a destructive invasive species, being included in the list of the world's 100 worst invasive species. It gives its name to the carp family, Cyprinidae. Taxonomy The type subspecies is ''Cyprinus carpio carpio'', native to much of Europe (notably the Danube and Volga Rivers).Jian Feng Zhou, Qing Jiang Wu, Yu Zhen Ye & Jin Gou Tong (2003). Genetic divergence between ''Cyprinus carpio carpio'' and ''Cyprinus carpio haematopterus' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreochromis Mossambicus
''Oreochromis'' is a large genus of Oreochromini, oreochromine cichlids, fishes Endemism, endemic to Africa and the Middle East. A few species from this genus have been Introduced species, introduced far outside their native range and are important in Aquaculture of tilapia, aquaculture. Many others have very small ranges; some are seriously Threatened species, threatened, and ''O. ismailiaensis'' and ''O. lidole'' possibly are extinct. Although ''Oreochromis'' primarily are freshwater fish of rivers, lakes and similar habitats, several species can also thrive in brackish waters and some even survive in hypersaline conditions with a salinity that far surpasses that of seawater. In addition to overfishing and habitat loss, some of the more localized species are threatened by the introduction of other, more widespread ''Oreochromis'' species into their ranges. This is because they—in addition to competing for the local resources—often are able to Hybrid (biology), hybridize. '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tilapia Sparrmanii
''Tilapia sparrmanii'', the banded tilapia, or vlei kurper, is a widespread and adaptable cichlid fish that is found in warmer freshwater habitats of southern Africa. They prefer water with ample plant cover, and occur naturally as far north as DR Congo and Tanzania. They have been introduced locally in the northern hemisphere. Younger banded tilapia feed on crustaceans and insect larvae, while the adults feed on terrestrial and aquatic plants and other debris. They undertake local migrations and may shoal before and during spawning time. They guard their own eggs, and although they may move eggs or fry in the mouth, they are not known to be actual mouthbrooders like several other tilapia species. This species can reach a length of TL and is an important foodfish. The identity of the person honoured in the specific name is uncertain but it is probably the Swedish naturalist Anders Sparrman (1748-1820) who was in the Cape A cape is a clothing accessory or a sleeveless out ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micropterus
''Micropterus'' is a genus of North American freshwater fish collectively known as the black bass, which belong to the sunfish family (biology), family Centrarchidae of order (biology), order Centrarchiformes. They are sometimes erroneously called "black trout", but the name trout more correctly refers to certain potamodromous members of the family Salmonidae (order Salmoniformes). ''Micropterus'' are widely distributed east of the Rocky Mountains, from the Hudson Bay basin in Canada to northeastern Mexico. Several species, notably the largemouth bass, largemouth and smallmouth bass, have been very widely introduced species, introduced throughout the world, and are now considered cosmopolitan (species), cosmopolitan. All black bass species are highly sought-after game fish and well known as strong fighters when angling, hooked, and bass fishing is an extremely popular outdoor sport throughout their native range. Their meat is quite edible and firm, although they are not regarde ... [...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, invasive species, and climate change. 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Genetic Association
The American Genetic Association (AGA) is a US-based professional scientific organization dedicated to the study of genetics and genomics which was founded as the American Breeders Association in 1903. The association has published the '' Journal of Heredity'' since 1914, which disseminates peer-reviewed organismal research in areas of general interest to the genetics and genomics community. Recent articles have focused on conservation genetics of endangered species and biodiversity discovery, phylogenomics, molecular adaptation and speciation, and genotype to phenotype associations. History The American Breeders Association held its first meeting in 1903 to discuss the "new" science of genetics that arose from Charles Darwin's theory of evolution and Gregor Mendel's discoveries of the laws of inheritance. The organization was established "to study the laws of breeding and to promote the improvement of plants and animals by the development of expert methods of breeding." In 191 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek () 'most' and (; Latinized as ) 'new'. The aridification and cooling trends of the preceding Neogene were continued in the Pleistocene. The climate was strongly variable depending on the glacial cycle, oscillating between cold Glacial period, glacial periods and warmer Interglacial, int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Heredity
The ''Journal of Heredity'' is a peer-reviewed scientific journal concerned with heredity in a biological sense, covering all aspects of genetics. It is published by Oxford University Press on behalf of the American Genetic Association. History The trends in topics that have been published in the journal reflect the history of the discipline of genetics.Crow, J F (2004). "Genetics: Alive and Well. The First Hundred Years as Viewed Through the Pages of the Journal of Heredity. WILHEMINE E. KEY 2003 INVITATIONAL LECTURE". J Hered (95(5):365–374. Early issues included many papers on eugenics, particularly under the editorial leadership of the journal's first two editors-in-chief, Paul Popenoe and R. C. Cook. Emphasis on eugenics in the journal declined throughout the 1940s and 1950s as support for the topic waned in the scientific community and the general public; when Cook's daughter, Barbara Kuhn, took over as editor in 1962 after her father's 40-year service, "...the subject ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
