world's longest river. "Freshwater Crabs and Shrimps (Crustacea: Decapoda) of the Nile Basin".  Their extraordinary diversity and speed of evolution have been the subjects for many scientists studying the forces that drive the richness of life everywhere. the layer of water that lies below the thermocline, is noncirculating, and remains perpetually cold) were lower in 1990–1991 for a longer period than in 1960–1961, with values of less than 1 mg per litre (< 0.4 gr/cu ft) occurring in water as shallow as 40 metres (130 ft) compared with a shallowest occurrence of greater than 50 metres (160 ft) in 1961. Click on the tags below to find other quizzes on the same subject. 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). I can only ask if Lake Victoria has any geopolitical importances to these Nile countries? Froese, Rainer and Pauly, Daniel, eds. variabilis).. 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. The removal of Haplochromis, however, may have contributed to the increasing frequency of algal blooms, which may in turn be responsible for mass fish kills. The outflow from Lake Victoria into the NILE is in the country of UGANDA. Lake Victoria is shared among three countries in Africa. Uganda General Information Map of Uganda Kampala Kibale National Park Queen Elizabeth National Park Murchison Falls National Park Bwindi Impenetrable National Park. At the lake’s southeastern corner is Speke Gulf, and at the southwestern corner Emin Pasha Gulf. Nevertheless, others of these features are not consistent within the lakes and have not been adequately explained.…. A detailed survey of the lake was made by Sir William Garstin in 1901. Animal flesh decays considerably faster, however, so the fertility of the lake is dependent on the rate at which these nutrients can be taken up by fish and other organisms. Lake Victoria is known to be 2nd largest fresh water lake, and is the source of the White Nile river. Local fisheries once depended on catching the lungfish, tilapia, carp and catfish that comprise the local diet. Lake Victoria (or Victoria Nyanza in the Bantu language) is the largest of the African Great Lakes, the largest lake in Africa and the world’s second largest freshwater lake by surface area, after Lake Superior. The lake’s deeply indented northern coast is flat and bare. With ten countries in the Nile 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. , 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. Ochiel, W. Gitonga and S.W.  Furthermore, Graham noted that the introduction of the European flax gill net of 5 inch mesh had undoubtedly caused a diminution in the number of ngege in those parts of the Kavirondo Gulf, the northern shore of the lake, the Sesse Islands and Smith's Sound which are conveniently situated close to markets.  Although these have contributed to the extinction of native fish by causing significant changes to the ecosystem, outcompeted natives and (in the case of the Nile tilapia) possibly hybridized with the highly threatened native tilapias, the most infamous introduction was the large and highly predatory Nile perch (Lates niloticus).  In the Kenya sector, the main influent rivers are the Sio, Nzoia, Yala, Nyando, Sondu Miriu, Mogusi, and Migori. The Ugandan cities of Kampala and Entebbe lie along or near the northern coast. The only outflow for Lake Victoria is at Jinja, Uganda, where it forms the Victoria Nile. Reported in Slate, the history of Lake Victoria is a fascinating one. 2nd edition. That’s more species than in any other lake on Earth, save Lake Malawi.. 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.  The Williams' mud turtle is restricted to Lake Victoria and other lakes, rivers, and swamps in the upper Nile basin.  Lake Victoria last dried out about 17,300 years ago, and it refilled 14,700 years ago as the African humid period began.. This quiz has tags. Uganda Access points to Lake Victoria from Uganda include Kampala, Jinja & Entebbe. Omissions? , 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). Log in.  As the species was already present, there were few objections when more Nile perch were transferred to Victoria to further bolster the stock in 1962–63. Therefore, it is of utmost importance to counteract against the rapidly deteriorating water quality in the Lake Victoria Basin (LVB). Understandably so, Lake Victoria Africa attracts visitors, be they locals who come to fish the waters, or tourists hoping to enjoy the beautiful landscape. Sediment and suspended solids are filtered out using sand, which acts like a sieve. Public awareness exercises were also conducted. The search by Europeans for the source of the Nile led to the sighting of the lake by the British explorer John Hanning Speke in 1858. 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. The Kagera River, the largest and most important of the lake affluents, enters the western side of Lake Victoria just north of latitude 1° S. The only other river of note entering from the west is the Katonga, north of Kagera. No other fish equals it in the quality of the flesh. Lake Victoria (at 68 000 km 2, Africa’s largest lake, the world’s largest tropical lake and the world’s second largest freshwater lake is a shared lake with basin countries of … Lake Victoria is a huge lake in Eastern Africa - it's so big that it stretches over parts of three different countries. Lake Victoria is considered the most dangerous water body of its kind in the world due to the number of deaths recorded every year.. Articles from Britannica Encyclopedias for elementary and high school students. Lake Victoria is known to be 2nd largest fresh water lake, and is the source of the White Nile river. Lake Victoria covers an approximate 68,800 km squared.  The Victoria haplochromines are part of an older group of more than 700 closely related species, also including those of several smaller lakes in the region, notably Kyoga, Edward–George, Albert, and Kivu. The latter likely is the smallest African freshwater crab with a carapace width up to about 1.6 cm (0.6 in), although P. kantsyore of Kagera River, and Platythelphusa maculata and P. polita of Lake Tanganyika are almost as small. (See East African Rift System.) Cumberlidge, N. (2009). Victoria Nyanzanēăn´zə, nī– [key], largest lake of Africa and the world's second largest freshwater lake, c.26,830 sq mi (69,490 sq km), E central Africa, on the Uganda-Tanzania-Kenya border.  There are 17 species of bivalves (Corbicula, Coelatura, Sphaerium, and Byssanodonta), including 6 endemic species/subspecies. The three countries bordering Lake Victoria – Uganda, Kenya and Tanzania – have agreed in principle to the idea of a tax on Nile perch exports, proceeds to be applied to various measures to benefit local communities and sustain the fishery. The lake has a surface area of 68,800 square kilometers (or 26,600 square miles), which also makes it the world’s largest tropical lake. In addition, it's the largest tropical lake in the world, and the planet's second largest freshwater lake. 256pp. Today, the composition and yields of such fish catches are virtually negligible. Sitting in a fertile basin, the area is predictably heavily cultivated and densely populated, and given that much of its shoreline is marshy and infested with bilharzia, swimming is not an option.  The origin of the first Victoria introductions in the 1950s is not entirely clear and indisputable evidence is lacking. Uganda General Information Map of Uganda Kampala Kibale National Park Queen Elizabeth National Park Murchison Falls National Park Bwindi Impenetrable National Park. Among the freshwater lakes of the world, it is exceeded in size only by Lake Superior in North America. (2008). The first recorded information about Lake Victoria comes from Arab traders plying the inland routes in search of gold, ivory, other precious commodities, and slaves. 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