lake victoria usa

2021年1月17日

The subsequent decrease in the number of algae-eating fish allows the algae to grow at an alarming rate, thereby choking the lake. and P M. Kareiva, editors (1998). Geologically, Lake Victoria is relatively young at about 400,000 years old. [70][72] It is likely that undescribed species of snails remain. The eastern edge of the CDP is the eastern border of the township (and county), with Sciota Township of Shiawassee County to the east. A standard for mimicking the old rate of outflow called the "agreed curve" was established, setting the maximum flow rate at 300 to 1,700 cubic metres per second (392–2,224 cu yd/sec) depending on the lake's water level. Lake Victoria is located in southeast Michigan. leucostictus). The lake includes many species of fish that inhabit nowhere else, especially cichlids. Measurements at the deepest part of the lake indicate that it reaches a total depth of 1,949 feet. Named after Queen Victoria, it is one of the African Great Lakes and is fed by inflows from the Kagera River. CS1 maint: multiple names: authors list (. It feeds primarily on female mosquitos. This massive lake, commonly known as Nyanza, is twice the size of Wales, and forms a natural boundary between Kenya, Tanzania and Uganda. No other fish equals it in the quality of the flesh. Chapter 27, pp. Lake Victoria Fisheries Organization (2016). [53][54][55][56][57], Before the mass extinction that has occurred among the lake's cichlids in the last 50 years, about 90 percent of the native fish species in the lake were haplochromines. Musiker/in/Band. Contact us. Lake Victoria has $188,300 median house value in 2010-2014, ranked #59 in Michigan, grew 12.35% since 2006-2010. Among the freshwater lakes of the world, it is exceeded in size only by Lake Superior in North America. Lake Victoria, Uganda. Local fisheries once depended on catching the lungfish, tilapia, carp and catfish that comprise the local diet. Oxygen concentrations in hypolimnetic waters (i.e. The lake existed and was known to many Africans in the catchment area long before it was sighted by a European in 1858 when the British explorer John Hanning Speke reached its southern shore while on his journey with Richard Francis Burton to explore central Africa and locate the Great Lakes. Passwort vergessen? The lake has a maximum depth of between 80 and 84 m (262 and 276 ft)[11][14] and an average depth of 40 m (130 ft). [86] Greater growth was observed in the northern part of the lake, in relatively protected areas, which may be linked to current and weather patterns and could also be due to the climate and water conditions, which are more suitable to the plants growth (as there are large urban areas to the north end of the lake, in Uganda). Cumberlidge, N. (2009). As a by-product of this the oxygen levels in the deeper layer of water are being depleted. Freshwater biodiversity in the Lake Victoria Basin: Guidance for species conservation, site protection. Lake Victoria or Victoria Nyanza (also known as Ukerewe and Nnalubaale) is a lake in Africa.It is bordered and governed by the countries of Tanzania, Uganda and Kenya.The lake is in the western part of Africa's Great Rift Valley.. Lake Victoria is 68,800 square kilometres (26,560 mi²) in size. wind speeds 207-260 mph) tornado 7.6 miles away from the Lake Victoria place center killed one person and injured 8 people and caused between $50,000 and $500,000 in damages. Institutions of the East African Community: This page was last edited on 14 January 2021, at 07:36. Because of this, most of Lake Victoria's nutrients are thought to be locked up in lake-bottom deposits. Nevertheless, the natives continued to dominate fisheries until the 1970s where their decline meant that there was a strong shift towards the non-native Nile tilapia (now 7 percent of catches), non-native Nile perch (60 percent) and the native Lake Victoria sardine (30 percent). Jäger, J., Bohunovsky, L., Radosh, L., & Sustainability Project. Public awareness exercises were also conducted. Lake Victoria has some hidden treasures which are not yet well known to the world one of them is Equator Island. POATE; EVENTS; CORPORATE; HELP; CONTACT US PLAN A TRIP SEARCH; English ; French ; Spanish ; German ; Portuguese ; Arabic ; Japanese 547–61 in : Dumony, H.J. [70][71] There are 17 species of bivalves (Corbicula, Coelatura, Sphaerium, and Byssanodonta), including 6 endemic species/subspecies. Its shores are dotted with key cities and towns, including Kisumu, Kisii, and Homa Bay in Kenya; Kampala, Jinja and Entebbe in Uganda; and Bukoba, Mwanza, and Musoma in Tanzania. [30] A 2016 project digitized ten-thousand points and created the first true bathymetric map of the lake. Despite is massive size (About the same size as Ireland), it is massively shallow and its deepest point is only 100 meters. $10,031.79 per adult. However, the most distal source of the Nile Basin, and therefore the ultimate source of the Nile, is more often considered to be one of the tributary rivers of the Kagera River (the exact tributary remains undetermined), and which originates in either Rwanda or Burundi. Jasper National Park, Canadian Rockies Picture: Lake Victoria - Check out Tripadvisor members' 10,017 candid photos and videos of Jasper National Park [38] This is far more species of fish than any other lake in the world, except Lake Malawi. [1], Census-designated place & unincorporated community in Michigan, United States, ‡This populated place also has portions in an adjacent county or counties, "Geographic Identifiers: 2010 Demographic Profile Data (G001): Lake Victoria CDP, Michigan", U.S. Geological Survey Geographic Names Information System: Lake Victoria Census Designated Place, https://en.wikipedia.org/w/index.php?title=Lake_Victoria,_Michigan&oldid=949740064, Unincorporated communities in Clinton County, Michigan, Census-designated places in Clinton County, Michigan, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 8 April 2020, at 07:32. [41] Initially the population of the Nile perch was relatively low, but a drastic increase happened, peaking in the 1980s, followed by a decline starting in the 1990s.[41]. As of the 2010 census it had a population of 930.[1]. Facebook möchte mit diesen … Expand map. The lake exhibits eutrophic conditions. Kontaktiere Victoria Lake im Messenger. Warmolts (25 May 2015). Lake Victoria has 0.82 square miles of land area and 0.23 square miles of water area. Quality breeder of African Cichlids since 2002 and continued to expand throughout 2011. [23] Lake Victoria receives its water additionally from rivers, and thousands of small streams. For a comprehensiwe list of these islands, see: J. Prado, R.J. Beare, J. Siwo Mbuga & L.E. In terms of contributed water, this makes Lake Victoria the principal source of the longest branch of the Nile. The lake is the heart of the African continent, the source of its mightiest river, the Nile. [39] These are the result of a rapid adaptive radiation in the last circa 15,000 years. Burton, who had been recovering from illness at the time and resting further south on the shores of Lake Tanganyika, was outraged that Speke claimed to have proved his discovery to have been the true source of the Nile River, which Burton regarded as still unsettled. Several rivers are also having levels of water that is draining into the lake,” said Aura. Lake Victoria Dive Site near Homestead Afb, Homestead, Key Biscayne, Miami, Miami Beach, Key Largo & Golden Glades United States. [89] More recently, measures have been used such as the introduction of natural insect predators, including two different water hyacinth weevils and large harvesting and chopping boats, which seem to be much more effective in eliminating the water hyacinth. Lake Victoria receives 80 percent of its water from direct rainfall. [75], Evarcha culicivora is a species of jumping spider (family Salticidae) found only around Lake Victoria in Kenya and Uganda. Ochiel, W. Gitonga and S.W. [41] Others have become extinct in their pure form, but survive as hybrids between close relatives (especially among the detritivores). [29], Many mammal species live in the region of Lake Victoria, and some of these are closely associated with the lake itself and the nearby wetlands. variabilis).[58][59]. Lake Victoria is one of African great lakes which was named after Queen Elizabeth Victoria of England who was sent by reins of England, the lake is relatively young by 400,000years and was formed when westward flowing rivers were dammed by an up thrown crustal block. Overall, the timing of the decline could be linked to all of these factors and perhaps together, in combination, they were more effective than any one deterrent would have been by itself. Finden Sie perfekte Stock-Fotos zum Thema Lake Victoria sowie redaktionelle Newsbilder von Getty Images. These cities and towns are also home to many factories that discharge some chemicals directly into the lake or its influent rivers. [38], Other factors which may have contributed to the decline of the water hyacinth in Lake Victoria include varying weather patterns, such as El Niño during the last few months of 1997 and first six months of 1998 bringing with it higher levels of water in the lake and thus dislodging the plants. [41] As a result of predation by the introduced Nile perch, eutrophication and other changes to the ecosystem, it is estimated that at least 200 species (about 40 percent) of Lake Victoria haplochromines have become extinct,[37][41][46] including more than 100 undescribed species. Although it is a part of the same river system known as the White Nile and is occasionally referred to as such, strictly speaking this name does not apply until after the river crosses the Uganda border into South Sudan to the north. [35] Disregarding the haplochromines, the only native Victoria cichlids are two critically endangered tilapia, the Singida tilapia or ngege (Oreochromis esculentus) and Victoria tilapia (O. Invasive fish, such as the Nile perch, have driven many endemic species to extinction. The release of large amounts of untreated wastewater (sewage) and agricultural and industrial runoff directly into Lake Victoria over the past 30 years has greatly increased the nutrient levels of nitrogen and phosphorus in the lake "triggering massive growth of exotic water hyacinth, which colonised the lake in the late 1990s". [86][90], Growth of the water hyacinth in Lake Victoria has been tracked since 1993, reaching its maxima biomass in 1997 and then declining again by the end of 2001. In the late 1860s, the famous Scottish explorer and missionary David Livingstone failed in his attempt to verify Speke's discovery, instead pushing too far west and entering the River Congo system instead. In this way, the Nile perch has degraded the diverse and thriving ecosystem that was once Lake Victoria. Sayer, C.A., L. Máiz-Tomé, and W.R.T. Extensive fish kills, Nile perch, loss of habitat and overfishing have caused many fisheries to collapse and many protein sources to be unavailable at the market for local consumption. London: Crown Agents for the Colonies. [79] At the peak in the early 1990s, 500,000 tonnes (490,000 long tons; 550,000 short tons) of Nile perch were landed annually in Lake Victoria, but this has declined significantly in later years. The deepest measured point of Lake Victoria is 270 feet deep. Lake Victoria, Michigan detailed profile. Today, the composition and yields of such fish catches are virtually negligible. (editor). In 1952, engineers acting for the government of Colonial Uganda blasted out the weir and reservoir to replace it with an artificial barrage to control the level of the lake and reduce the gradual erosion of the rock weir. [41][80] To boost fishing, several species of non-native tilapia and Nile perch were introduced to the lake in the 1950s. At the same time it was warned that this could present a serious danger to the native fish species and required extensive research into possible ecological effects before done. [27], The non-cichlid native fish include African tetras (Brycinus), cyprinids (Enteromius, Garra, Labeo, Labeobarbus, Rastrineobola and Xenobarbus), airbreathing catfish (Clariallabes, Clarias and Xenoclarias), bagrid catfish (Bagrus), loach catfish (Amphilius and Zaireichthys), silver butter catfish (Schilbe intermedius), Synodontis squeaker catfish, Nothobranchius killifish, poeciliids (Aplocheilichthys and Micropanchax), the spiny eel Mastacembelus frenatus, elephantfish (Gnathonemus, Hippopotamyrus, Marcusenius, Mormyrus, Petrocephalus, and Pollimyrus), the climbing gourami Ctenopoma muriei and marbled lungfish (Protopterus aethiopicus). [68], The only shrimp/prawn is Caridina nilotica,[69] which is common and widespread in Lake Victoria. [18][61] By itself, this vegetative matter decays slowly. [35] The main group in Lake Victoria is the haplochromine cichlids (Haplochromis sensu lato) with more than 500 species, almost all endemic,[21][36][37] and including an estimated 300 that still are undescribed. Most people in Lake Victoria, MI commute by N/A, and the average commute time is 26.2 minutes. Geologically, Lake Victoria is relatively young at about 400,000 years old. (1929.) ", 10.2305/IUCN.UK.2016-3.RLTS.T60318A47182908.en. It formed when westward-flowing rivers were dammed by an upthrown crustal block. Few fisheries, though, have been able to make the switch to catching the Nile perch, since that requires a significant amount of capital resources.[83]. In addition, it's the largest tropical lake in the world, and the planet's second largest freshwater lake. It occupies a surface area of 69,485 square kilometers. Fiedler, P.L. [89][91][92][93] A green power plant that uses harvested water hyacinth (but also can use other degradable waste) was constructed in Kisumu County in 2013. Log a dive or post a picture at Lake Victoria. “The waters of Lake Victoria are swelling as a result of climate change. [35][41][79], As early as the 1920s, it was proposed to introduce a large pelagic predator such as the Nile perch to improve the fisheries in the lake. Quick View. Viele übersetzte Beispielsätze mit "Lake Victoria" – Deutsch-Englisch Wörterbuch und Suchmaschine für Millionen von Deutsch-Übersetzungen. It's also one of the world's largest tropical lake second to superior lake in North America. More info. [104], Since the 1900s, Lake Victoria ferries have been an important means of transport between Uganda, Tanzania, and Kenya. The Land, the Races and their Customs, with Specimens of Some of the Dialects", "How feud wrecked the reputation of explorer who discovered Nile's source", "Origin of the Superflock of Cichlid Fishes from Lake Victoria, East Africa", "Deoxygenation of the deep water of Lake Victoria, East Africa", Verhandlungen der Internationale Vereinigung für Limnologie, "Environmental and Social Management Framework-ESMF", 10.2305/IUCN.UK.2016-1.RLTS.T60668A97125826.en, "Ancient hybridization fuels rapid cichlid fish adaptive radiations", 10.2305/IUCN.UK.2010-3.RLTS.T185857A8492470.en, "Prevalence of disruptive selection predicts extent of species differentiation in Lake Victoria cichlids", "Two new species of zooplanktivorous haplochromine cichlids from Lake Victoria, Tanzania", "A pharyngeal jaw evolutionary innovation facilitated extinction in Lake Victoria cichlids". The Lake Victoria CDP consists of a residential development surrounding a lake of the same name in eastern Victor Township. 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