Temporal and spatial distribution of microcrustacean zooplankton in relation to turbidity and other environmental factors in a large tropical lake (L. Tana, Ethiopia). Seasonal variation in primary production of a large high altitude tropical lake (Lake Tana, Ethiopia): effects of nutrient availability and water transparency. Late Pleistocene desiccation of Lake Victoria and rapid evolution of cichlid fishes. [1], In its upper course it runs for 256 km (159 mi) along the Finnish–Norwegian border, between the municipalities of Utsjoki, Finland and Karasjok and Tana, Norway. The Athi-Galana-Sabaki River is the second longest river in Kenya (after the Tana River). The river rises in the Gatamaiyo Forest as the Athi River and enters the Indian Ocean as the Galana River (also known as the Sabaki River). •Five HEP dams in the Upper Tana Basin - Kindaruma, Kiambere, Kamburu, Gitaru and Masinga. Rzóska, J., 1976b. Media related to Tana River (Fennoscandia) at Wikimedia Commons, https://en.wikipedia.org/w/index.php?title=Tana_(Norway)&oldid=998242155, Articles containing undetermined-language text, Articles containing Finnish-language text, Articles containing Northern Sami-language text, Articles containing Norwegian-language text, Articles containing Swedish-language text, Articles with dead external links from December 2017, Articles with permanently dead external links, Wikipedia articles with WORLDCATID identifiers, Creative Commons Attribution-ShareAlike License, This page was last edited on 4 January 2021, at 13:18. Lake Tana has a number of islands, whose number varies depending on the level of the lake. 216.70.68.19. Journal of Fish Biology 66: 1214–1236. & S. Mengistu, 2006. Dumont, H. J., 1986a. de Graaf, M., M. A. M. Machiels, T. Wudneh & F. A. Sibbing, 2004. (see also this volume pp. ), The Nile: Monographiae Biological Springer, Dordrecht. The Tana is well known for its excellent salmon fishery and is the most productive salmon river in Finland and Norway. Witte, F., M. de Graaf, O. Mkumbo, A.I. The world's record for Atlantic salmon is held by a salmon caught on the Tana; it was 36 kilograms (79 lb) and was taken in 1929 by the late Nils Mathis Walle. The development of plankton in relation to the hydrological regime in the Blue Nile. Birds of Eastern Africa. Type of irrigation. ), M. de Graaf, L. A. L. Nagelkerke, T. Wudneh, J. W. M. Osse & F. A. Sibbing, 2006c. Tis Abay Printing Press, Bahir Dar, Ethiopia: 84 pp. 219–221. Area under Irrigation. The river discharges into the Tanafjorden, one of the largest and most unspoiled river deltas in Europe. © 2020 Springer Nature Switzerland AG. 495–525. 61–74. Monographiae Biologicae, Springer. The Blue Nile in the plains. They consist of permanent swamps, seasonal swamps, and areas subjected to regular inundation. Download preview. They contribute about 82% of household incomes and more than 80% of employment. Dejen, E. Other Crops. Dumont, H. J., 1986b. There are large deposits of sand in the delta that are exposed sandbars at low tide.[1]. Mohr, P. A., 1962. 75–88. Administrative. Kruiswijk, C. P., T. Hermsen, J. van Heerwaarden, B. Dixon, H. F. J. Savelkoul & R. J. M. Stet, 2005. Feeding performance and predation techniques among segregating piscivores in Lake Tana's. pCO 2 values were generally higher in the lower main Tana River compared to headwater tributaries, opposite to the pat- Rzóska, J., 1976c. The main tributaries to the lake are Gilgel Abbay (Little Nile River), and the Megech, Gumara, and Rib rivers. Junk, The Hague, pp. The capital and largest town is Hola (sometimes known as Galole). In M. J. Burgis & J. J. Symoens (eds), Travaux et Documents/ Institut Francais de Recherche Scientifique pour le Development en cooperation no. 14–17. In African wetlands and shallow water bodies. Rapid speciation of Lake Tana's Barbus (Cyprinidae; East-Africa) as inferred from mtDNA markers. Demographics. Seven large permanent rivers feed the lake as well as ca 40 small seasonal rivers. These keywords were added by machine and not by the authors. Colored elevation map. Internal Report ARARI, Bahir Dar, Ethiopia, 14 pp. The river contributes approximately 80% of River Nile’s proper waters during the rainy season. The fish community of the Lake is dominated by cyprinid fishes, 20 of the 27 fish species (e.g. Journal of Ecology 55: 637–662. The River Nile, a case history. The Blue Nile’s principal tributaries are the Rahad and Dinder rivers, which source their waters from the Ethiopian Highlands. Lamb, H. F., C. R. Bates, P. V. Coombes, M. H. Marschall, M. Umer, S. J. Davies & E. Dejen, 2007. Journal of Fish Biology 48: 383–404. Reconnaissance survey on the river fisheries of Benishangul—Gumuz regional state. 223–232. Wetlandss distribution in Amhara region, their importance and current threats. Eight million people live along the river, where tea, coffee, maize and other cash crops are grown for export, and cattle grazing and fishing provide major sources of food for large parts of the country’s population. This service is more advanced with JavaScript available, The Nile Report of the Amhara National Region Rehabilitation Development Organisation (TIRET). Adaptive radiation of Lake Tana's (Ethiopia), Dejen, E., F. A. Sibbing & J. Vijverberg, 2003. Dejen, E., J. Vijverberg, L. A. J. Nagelkerke & F. A. Sibbing, 2004. Sibbing, F. A. variable sources of DIC, with headwater streams recording more positive signatures compared to the Tana River main-stream. B. Dixon, A. Hailu & A. P. Wood (eds), Proceedings of the Wetland Awareness Creation and Activity Identification Workshop in Amhara National Regional State. Origin environments limnology and human ure. Describing a wide arc, the Tana then veers south and opens into a wide valley, where it meanders … Allan, J. Tana River. Components of the malacofauna of Abissynia and Somalia (in Italian). ), The Nile, Biology of an Ancient River. Sibbing, F. A., L. A. J. Nagelkerke, R. J. M. Stet & J. W. M. Osse, 1998. The river flows through Troms og Finnmark county, Norway and the Lapland region of Finland. Demographics. In R. T. Oglesby, C. A. Carlson & J. At 1,830 m altitude, Lake Tana is situated on the basaltic Plateau of the north-western highlands of Ethiopia covering an area of ca 3,050 km 2. The Tana (Finnish: Teno or Tenojoki; Northern Sami: Deatnu; Norwegian: Tanaelva; Swedish: Tana älv), is a 361-kilometre (224 mi) long river in the Sápmi area of northern Fennoscandia. In J. Rzóska (ed. Evolutionary origin of Lake Tana's (Ethiopia) small, de Graaf, M., E. Dejen, J. W. M. Osse & F. A. Sibbing, 2008. Not logged in River Tana. Tana River County is one of the six Counties in the Coast region. Farming and nomadic pastoralism are the main economic activities in Tana River County due to the dry conditions and erratic rainfall patterns experienced in the county. They act as nurseries for most of the fish populations in the lake, and serve as breeding ground for water fowl and mammals. Annali di Museo Civico di Storia Naturale Giacomo Doria 65: 1–44. The Blue Nile System. Morris, P., M. J. Largen & D. W. Yalden, 1976. 243–256. Kluwer, Dordrecht, pp. Chapman & Hall, London, pp. Birds of the Nile. In H. J. Dumont (ed. Biology and management of fish stocks in Bahir Dar Gulf, Ethiopia. The main tributaries to the lake are Gilgel Abbay (Little Nile River), Megech River, Gumara River and the Rib River. Notes on the biogeography of the Blue Nile (Great Abbai) Gorge in Ethiopia. Location of Tana River, county of Kenya, . With with only a few exceptions, the entire riverine network was supersaturated in CO2, implying the system is a net source of CO2 to the atmosphere. 211 Paris, ORSTOM, 300–311. Riverine spawning and reproductive segregation in a lacustrine cyprinid species flock, facilitated by homing? In B. R. Davies & K. F. Walker (eds), The Ecology of River Systems. Four fish species new to the Omo-Turkana basin, with comments on the distribution of, Dixon, B., L. A. J. Nagelkerke, F. A. Sibbing, E. Egberts & R. J. M. Stet, 1996. The large barbs (, Nagelkerke, L. A. J., F. A. Sibbing, J. G. M. van den Boogaart, E. H. R. R. Lammens & J. W. M. Osse, 1994. Workshop ‘Fish and Fisheries of Lake Tana: Management and Conservation’. Speciation of endemic Lake Tana barbs (, Stiassny, M. L. J. Data. Agriculture and livestock production are the main sources of livelihood in Tana River. Dumont, H. J., 1983. Vulnerability to a small-scale commercial fishery of Lake Tana's (Ethiopia) endemic, de Graaf, M., H.-J. Unpublished M.Sc. January 23rd 2001 Bahir Dar, Ethiopia, pp. 167–179. The Geographical Journal 166: 49–62. & S. Aynalem, 2007. ), The Nile, Biology of an Ancient River. Berie, Z., 2007. Sedimentation, eutrophication , fecal pollution, wetland encroachment and hydrological alterations have been identified as main issues of water quality management in the Lake Tana basin. Data. It rises near Techiman and flows southward for 250 miles (400 km) to enter the Gulf of Guinea (Atlantic Ocean), at Aby Lagoon, Côte d’Ivoire (Ivory Coast). Harper & Collins, London, 301 pp. The overall goal of the survey was to determine the prevalence of malnutrition among the children aged 6- 59 months old, pregnant and lactating mothers in Tana River County. ), The Nile. This speciation was possible because the incipient Lake offered new habitats for adaptive radiation and maintained its isolation for millions of years from the lower Blue Nile. Howell, P. P. & P. Allan, 1994. Growth, biomass and production of two small barbs (, Dgebuadze, Y. Y., A. S. Golubtsov, V. N. Mikheev & M. V. Mina, 1994. This process is experimental and the keywords may be updated as the learning algorithm improves. Late Pleistocene dessication of Lake Tana, source of the Blue Nile. In J. Rzóska (ed. Fishes of Lake Roseires on the Blue Nile. Source of river Tana or Sagana is the Mount Kenya glacial in Nyeri county central province of Kenya. The Tana River basin supplies Nairobi with 80 per cent of its drinking water. The major ethnic groups are the Dagodie, Ogaden Pokomo, many of whom are farmers, and the Orma, Wardey and Gadsan who are peaceful people . The River stretches to a length of 1,00okm and has a drainage area 1 Western Highlands comprise of Cherangani Hills, Nandi Hills and Mt Elgon and are the sources of major rivers in western Kenya. Within 30 kilometres (19 mi) of its source at Lake Tana, the river enters a canyon about 400 kilometres (250 mi) long. Wudneh, T., 1998. In J. Rzóska (ed. Ricerche limnologiche B. Chimica e Biologia. Predicting and testing resource partitioning in a tropical fish assemblage of zooplanktivorous ‘barbs’: an ecomorphological approach. Evolution of. During the raining period these wetlands are connected with the lake. Tana River. In Proceedings of the Symposium on Lake Tana Watershed Management. These roads are located near Rustefjelbma and near Polmak, and have a weight limit of 2 tonnes (2.0 long tons; 2.2 short tons), but few other limitations. : You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. This lake and adjacent wetlands provide directly and indirectly a livelihood for more than 500,000 people. Muluneh, A. Wetlands are located all around the lake, with the exception of the Northeast. Aug 12, 2015 - Map of Ethiopia shows Lake Tana the main source for the blue Nile which supply the River Nile with 80% of its Water The Cnidaria of the Nile Basin. Vol. In H. J. Dumont (ed. The annual sea trout catch for that year on the river was 4,426 kilograms (9,758 lb). Kindie, A., 2001. Lake Net, USA: 35–48. Both Finland and Norway regulate the fishing on the river and drift net fishing is allowed on the river.[1]. Lake Tana large barbs: phenetics, growth and diversification. Declining stocks of Lake Tana's endemic. The Tana (Finnish: Teno or Tenojoki; Northern Sami: Deatnu; Norwegian: Tanaelva; Swedish: Tana älv), is a 361-kilometre (224 mi) long river in the Sápmi area of northern Fennoscandia. thesis, Department of Biology, Addis Ababa University. Lacustrine spawning: is this a new reproductive strategy among ‘large’ African cyprinid fishes? Together they contribute more than 95% of the total annual inflow. The Tana River is a major water resource in the area. The White Nile meets the Blue Nile at Khartoum. Bird surveys around Bahir Dar-Lake Tana IBA. At 1,830 m altitude, Lake Tana is situated on the basaltic Plateau of the north-western highlands of Ethiopia covering an area of ca 3,050 km2. Origin environments, limnology and human use. It is navigable from its mouth for Fishes of the Blue Nile between Khartoum and Roseires. Royalty-Free Illustration. & L. A. J. Nagelkerke, 2001. The northern section of the Nile passes through Sudan to Egypt and results in a large de… Tana River County is one of the six Counties in the Coast Region. The County has three main livelihood zones Schwenk, K., D. Posada & P. D. N. Hebert, 2000. Ethiopie and Djibouti (in French). The county lies between latitudes 000’53” and 200’41’’ South and longitudes 38025’43” and 40015’ East. The Tana Bridge was constructed in 1948; its main span is 195 metres (640 ft). The Blue Nile drains the NE Ethiopian Plateau (total catchment: 324,000 km2). Ph. of household farmers. 6–8 October 2003, Bahir Dar, Ethiopia. Anonymous, 2003. Faunas in the area reconnaissance survey on the River. [ 1 ] E. Nentwich! Lake was originally much larger than it is today River main-stream development initiatives challenges... 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