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Oreochromis Placidus
The black tilapia (''Oreochromis placidus'') is a freshwater species of fish of the genus Oreochromis, found in the wide region of Southern Africa. It is a edible tropical fish. Description The black tilapia can grow to the recorded maximum length of 35.5 cm (14 inches). The fish is silvery to steel-grey, with white abdomen. There is a red or orange margin on the dorsal and grey or black marblings on the gill-cover. The species are only reported to be found in fresh water at low altitudes and latitudes which suggests its relatively low salinity and temperature tolerances. Distribution The species are mainly found in the lower Zambezi river and other rivers southwards such as Runde, Pungwe, Rovuma Ruvuma River, formerly also known as the Rovuma River, is a river in the African Great Lakes region. During the greater part of its course, it forms the border between Tanzania and Mozambique (in Mozambique known as ''Rio Rovuma''). The river is ... and Buzi river. It is also f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethelwynn Trewavas
Ethelwynn Trewavas (5 November 1900 – 16 August 1993) was an ichthyologist at the British Museum of Natural History. She was known for her work on the families Cichlidae and Sciaenidae. She worked with Charles Tate Regan, another ichthyologist and taxonomist. Academic studies and career She received her bachelor's degree and Board of Education Certificate in Teaching in 1921 from Reading University, and then worked as a teacher before being employed by the King's College of Household and Social Science as a part-time demonstrator, spending most of her time on research. She was taught by Dr. Nellie B. Eales when associated with the Freshwater Biological Association. She met Charles Regan and was employed by him as his assistant until hired by the British Museum (Natural History) as Assistant Keeper in 1935. She was appointed Deputy Keeper of Zoology in 1958, and retired in 1961. She served as the senior scientist in the Fish Section of the British Museum (Natural Histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreochromis
''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] |
Southern Africa
Southern Africa is the southernmost subregion of the African continent, south of the Congo and Tanzania. The physical location is the large part of Africa to the south of the extensive Congo River basin. Southern Africa is home to a number of river systems; the Zambezi River being the most prominent. The Zambezi flows from the northwest corner of Zambia and western Angola to the Indian Ocean on the coast of Mozambique. Along the way, the Zambezi River flows over the mighty Victoria Falls on the border between Zambia and Zimbabwe. Victoria Falls is one of the largest waterfalls in the world and a major tourist attraction for the region. Southern Africa includes both subtropical and temperate climates, with the Tropic of Capricorn running through the middle of the region, dividing it into its subtropical and temperate halves. Countries commonly included in Southern Africa include Angola, Botswana, the Comoros, Eswatini, Lesotho, Madagascar, Malawi, Mauritius, Mozambique, Namib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish As Food
Many species of fish are caught by humans and consumed as food in virtually all regions around the world. Fish has been an important dietary source of protein and other nutrients throughout human history. The English language does not have a special culinary name for food prepared from fish like with other animals (as with ''pig'' vs. ''pork''), or as in other languages (such as Spanish ''pez'' vs. '' pescado''). In culinary and fishery contexts, ''fish'' may include so-called shellfish such as molluscs, crustaceans, and echinoderms; more expansively, seafood covers both fish and other marine life used as food. Since 1961, the average annual increase in global apparent food fish consumption (3.2 percent) has outpaced population growth (1.6 percent) and exceeded consumption of meat from all terrestrial animals, combined (2.8 percent) and individually (bovine, ovine, porcine, etc.), except poultry (4.9 percent). In ''per capita'' terms, food fish consumption has grown from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical Fish
Tropical fish are generally those fish found in aquatic tropical environments around the world. Fishkeepers often keep tropical fish in freshwater and saltwater aquariums. The term "tropical fish" is not a taxonomic group, but rather is a general term for fish found in such environments, particularly those kept in aquariums. Aquarium fish Tropical fish is a term commonly used to refer to fish that are kept in heated aquariums. Freshwater tropical fish are more commonly kept than saltwater tropical fish due to the common availability of fresh water sources, such as tap water, whereas salt water is not commonly available and has to be recreated by using fresh water with sea salt additions. Salt water has to be monitored to maintain the correct salinity because of the effects of evaporation. Freshwater tropical aquariums can be maintained by simply topping up with fresh water. Tropical fish are popular choices for aquariums due to their often bright coloration, which typically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through convergent evolution they have independently evolved external superficial fish-like body plans adapted to their marine environments, including most numerously fish, but also mammals such as cetaceans (whales, dolphins, and porpoises), and even extinct ancient marine reptiles such as various known species of ichthyosaurs. Most species have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of large cetaceans to identify individuals in the field. The bony or cartilaginous bones that support the base of the dorsal fin in fish are called ''pterygiophores''. Functions The main purpose of the dorsal fin is to stabilize the animal against rollin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zambezi
The Zambezi River (also spelled Zambeze and Zambesi) is the fourth-longest river in Africa, the longest east-flowing river in Africa and the largest flowing into the Indian Ocean from Africa. Its drainage basin covers , slightly less than half of the Nile's. The river rises in Zambia and flows through eastern Angola, along the north-eastern border of Namibia and the northern border of Botswana, then along the border between Zambia and Zimbabwe to Mozambique, where it crosses the country to empty into the Indian Ocean. The Zambezi's most noted feature is Victoria Falls. Its other falls include the Chavuma Falls at the border between Zambia and Angola, and Ngonye Falls near Sioma in western Zambia. The two main sources of hydroelectric power on the river are the Kariba Dam, which provides power to Zambia and Zimbabwe, and the Cahora Bassa Dam in Mozambique, which provides power to Mozambique and South Africa. Additionally, two smaller power stations are along the Zambezi Riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Runde River
The Runde River (formerly Lundi River) is a river in southeastern Zimbabwe. It is a tributary of the Save River and its major tributaries include the Ngezi River, Tokwe River, Mutirikwe River and Chiredzi River. Characteristics and geography The lower Runde River is an ephemeral sand river system, with permanent pools forming during the dry season. The river has generally low levels of pollution. The floodplain at the confluence with the Save River is an important wetland. See also * Chiredzi * Wildlife of Zimbabwe The wildlife of Zimbabwe occurs foremost in remote or rugged terrain, in national parks and private wildlife ranches, in miombo woodlands and thorny acacia or kopje. The prominent wild fauna includes African buffalo, African bush elephant, black ... References Rivers of Zimbabwe Save River (Africa) {{Zimbabwe-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pungwe River
Pungwe River ( pt, Rio Púngoè, links=no or ''Rio Púnguè'') is a long river in Zimbabwe and Mozambique. It rises below Mount Nyangani in the Eastern Highlands of Zimbabwe and then flows southeasteastward through the Manica and Sofala provinces of Mozambique. The Pungwe enters the Urema Valley, the southernmost portion of the Great Rift Valley, where it forms the southern boundary of Gorongosa National Park. The Urema River joins it, and the river follows the rift valley southward. Large seasonal wetlands form around the Pungwe and Urema rivers in the rift valley section. It empties into the Mozambique Channel at Beira, forming a large estuary. It is one of the major rivers of Mozambique and often causes floods. Tributaries The principal left tributaries are, from upstream to downstream, the Nhazonia, Txatola, Vinduzi, and Nhandugue-Urema. The right tributaries are the Honde and the Muda. Pungwe basin Administratively, the Pungwe Basin covers parts of Sofala and Manica p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rovuma River
Ruvuma River, formerly also known as the Rovuma River, is a river in the African Great Lakes region. During the greater part of its course, it forms the border between Tanzania and Mozambique (in Mozambique known as ''Rio Rovuma''). The river is long, with a drainage basin of in size. Its mean annual discharge is at its mouth. Overview The lower Ruvuma river is formed by the junction at of two branches of nearly equal importance, the longer of which, the Lujenda, comes from the south-west, the other, which still bears the name Ruvuma, from the west. Its source lies on an undulating plateau, high, immediately to the east of Lake Nyasa, at , the head-stream flowing first due west before turning south and east. In its eastward course, the Ruvuma flows near the base of the escarpment of an arid sandstone plateau to the north, from which direction the streams, which have cut themselves deep channels in the plateau edge, have almost all short courses. On the opposite bank the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buzi River (Mozambique)
Buzi River ( pt, Rio Búzi) is a river in Mozambique. The Buzi River originates in the Eastern Highlands (or Manica Highlands) on the border of Mozambique and Zimbabwe, and flows eastward through Manica and Sofala provinces of Mozambique. It empties to the Mozambique Channel west of Beira, forming a large estuary with the Pungwe River. The Buzi River is long, with a drainage basin in size. Its mean annual discharge is 79 m³/s (2,790 cfs) at its mouth. It often causes floods, frequently forming a floodplain together with the larger Pungwe River. Dombé and Búzi are situated on the banks of the river. The Buzi and its principal tributaries rise in the Eastern Highlands, or Manica Highlands, along the border with Zimbabwe. Some of the Buzi's headwater streams rise in Zimbabwe, and in other places the international border follows the watershed boundary. The Revué river is the main northern tributary, and its headwaters are in the Eastern Highlands near Machipanda. In 1968, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
