The reproductive biology of two ‘small barbs’ (. Diversity, abundance and biology of fishes from Beles and Gilgel Beles Rivers, Abbay basin Ethiopia. Environmental impact assessment for unusual reduced water level of Lake Tana. In Khartoum, the capital of Sudan, the section of the Nile is called White Nile. ), The Nile, Biology of an Ancient River. It has a total length of 390 kilometres (240 mi), and drains an area of 70,000 square kilometres (27,000 sq mi). 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. Speciation of endemic Lake Tana barbs (, Stiassny, M. L. J. ), The Nile, Biology of an Ancient River. Seasonal variation in primary production of a large high altitude tropical lake (Lake Tana, Ethiopia): effects of nutrient availability and water transparency. Tano River, river, western Ghana, West Africa. The Tana Bridge was constructed in 1948; its main span is 195 metres (640 ft). The term White Nile is used to highlight the area separating Lake No and Khartoum. •The Masinga Dam is the most significant in terms of regulating the hydrology of the Tana river due to its size. Kruiswijk, C. P., T. Hermsen, J. van Heerwaarden, B. Dixon, H. F. J. Savelkoul & R. J. M. Stet, 2005. D. thesis, Wageningen Institute of Animal Sciences, Wageningen University, The Netherlands, pp. Tana River County has four main livelihood zones namely; Pastoral, Marginal mixed farming, Mixed farming and National park as shown in figure 1. Hydrobiologia 513: 39–49. Howell, P. P. & P. Allan, 1994. 431–463). Spatial and temporal variation of cestode infection and its effects on two small barbs (. Demographics. Main Crop. Labels. depth 14 m) is Ethiopia's largest lake, containing half the country's freshwater resources, and the third largest in the Nile Basin. ), The Nile. In T. J. Pitcher & P. J. Phytoplankton: composition, development and productivity. The Sami Bridge at Utsjoki was constructed in 1993. Science 273: 1091–1093. Duration of development, biomass and rate of production of the dominant copepods (Calanoid and cyclopoida) in Lake Tana, Ethiopia. Tana River, river, Kenya, flowing 440 miles (708 km) from its headwaters in the Aberdare Range and Mount Kenya to the Indian Ocean. This service is more advanced with JavaScript available, The Nile Birds of Eastern Africa. Vol. Aquatic Ecology 41: 195–207. thesis, Department of Biology, Addis Ababa University. 61–74. Chapman & Hall, London, pp. Tana River district has a total area of 38,694km2 while Garissa is 43,931km2. Tana River County is one of the six Counties in the Coast Region. The Lake has been formed by volcanic activity, blocking the course of inflowing rivers in the early Pleistocene times ca 5 million years ago. Dragonflies from the Ethiopian Plateau and from Lake Tana. In Proceedings of the Symposium on Lake Tana Watershed Management. 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. Workshop ‘Fish and Fisheries of Lake Tana: Management and Conservation’. In H. J. Dumont (ed. The Blue Nile’s principal tributaries are the Rahad and Dinder rivers, which source their waters from the Ethiopian Highlands. Water is abstracted through pumping, conveyed and distributed in open earth canal and applied through furrow irrigation system. Source of irrigation water. Lake Tana large barbs: phenetics, growth and diversification. Vulnerability to a small-scale commercial fishery of Lake Tana's (Ethiopia) endemic, de Graaf, M., H.-J. The main tributaries to the lake are Gilgel Abbay (Little Nile River), and the Megech, Gumara, and Rib rivers. Download preview PDF. The fish community of the Lake is dominated by cyprinid fishes, 20 of the 27 fish species (e.g. This gorge is a tremendous obstacle for travel and communication from the north half of Ethiopia to the southern half. Harper & Collins, London, 301 pp. 1050 Households. Together they contribute more than 95% of the total annual inflow. Berie, Z., 2007. In J. Rzóska (ed. 89: 705–720. 75–88. There are large deposits of sand in the delta that are exposed sandbars at low tide.[1]. based, conflicts, Tana River County, Kenya INTRODUCTION Natural resources are an integral part of society, as a source of income, industry, and identity. Sibbing, 2009. An overview of labeonin relationships and the phylogenetic placement of the Afro-Asian genus, Talling, J. F., 1976. The county lies between latitudes 000’53” and 200’41’’ South and longitudes 38025’43” and 40015’ East. Over 10 million scientific documents at your fingertips. de Graaf, M., M. A. M. Machiels, T. Wudneh & F. A. Sibbing, 2004. Nile Basin asymmetries: a closed freshwater resource, soil water potential, the political economy and Nile transboundary hydropolitics. B. Dixon, A. Hailu & A. P. Wood (eds), Proceedings of the Wetland Awareness Creation and Activity Identification Workshop in Amhara National Regional State. Kindie, A., 2001. Describing a wide arc, the Tana then veers south and opens into a wide valley, where it meanders … In H. J. Dumont (ed. ), The Nile, Biology of an Ancient River. Anonymous, 2003. Junk, The Hague, pp. In winter, there are usually two ice roads that are in use from December to April. & F. A. Sibbing, 2000. pp 163-192 | Reale Accademia d'Italia 3: 71–116. The main tributaries of Tana are Anarjohka and Karasjohka rivers. Mishrigi, S. Y., 1970. 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. (ed. The suspended sediments reduce the under water light intensity and as such the primary production, the basis of the food web. The Blue Nile in the plains. In R. T. Oglesby, C. A. Carlson & J. Kluwer, Dordrecht, pp. Proceedings of the Royal Society of London B 267: 1833–1842. Tana River and Garissa districts. The river is the fifth longest in Norway. Evolution of. Teshale, B., 2003. Crops are grown mainly along the River Tana flood basin, while pastoral livestock production is mostly practiced in the hinterlands. 14–17. 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. Palstra, A. P., M. de Graaf & F. A. Sibbing, 2004. Ph. © Springer Science + Business Media B.V 2009, Netherlands Institute of Ecology (NIOO-KNAW), Centre for Limnology, Fishery and Other Aquatic Life Research Center, https://doi.org/10.1007/978-1-4020-9726-3_9. Dejen, E., J. Vijverberg & F. A. Sibbing. The river contributes approximately 80% of River Nile’s proper waters during the rainy season. Hammerton, D., 1976. Sign Up Login. The County has three main livelihood zones University College of Addis Ababa Press. This lake and adjacent wetlands provide directly and indirectly a livelihood for more than 500,000 people. Journal of Fish Biology 66: 1214–1236. Thinking the unthinkable: a candidate model for predicting sustainable yields of introduced fish species in African lakes. In African wetlands and shallow water bodies. Tana River. 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. Ph. Internal Report ARARI, Bahir Dar, Ethiopia, 14 pp. Dordrecht. The annual sea trout catch for that year on the river was 4,426 kilograms (9,758 lb). 216.70.68.19. Notes on the biogeography of the Blue Nile (Great Abbai) Gorge in Ethiopia. In A. Wondie, A. 89: 723–747. Journal of Ecology 55: 637–662. Dumont, H. J., 2009. & A. Getahun, 2007. Teshale, B., R. Lee & G. Zawdie, 2001. D. thesis, Wageningen University, The Netherlands, 296 pp, Nagelkerke, L. A. J. Pitcher, T. J., 1995. Site language: English français Homepage Data Catalog Gallery SDG NSDP. Bacci, G., 1951–1952. Download preview. Other Crops. In M. J. Burgis & J. J. Symoens (eds), Travaux et Documents/ Institut Francais de Recherche Scientifique pour le Development en cooperation no. In H. J. Dumont (ed. ), The Nile, Biology of an Ancient River. The river flows through Troms og Finnmark county, Norway and the Lapland region of Finland. Morris, P., M. J. Largen & D. W. Yalden, 1976. The Geographical Journal 166: 49–62. 89: 495–498. Fishes of the Blue Nile between Khartoum and Roseires. Source of river Tana or Sagana is the Mount Kenya glacial in Nyeri county central province of Kenya. 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. Molecular systematics of European Hyalodaphnia: the role of contemporary hybridisation in ancient species. 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. In H. J. Dumont (ed. Wondie, A., S. Mengistu, J. Vijverberg & E. Dejen, 2007. 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). Witte, F., M. de Graaf, O. Mkumbo, A.I. B. Hart (eds), The Impact of Species Changes in African Lakes. Molla, M. & T. Menelik, 2004. The river then plunges about 6,560 feet while on its 497-mile flow from the Ethiopian Highlands to the Sudanese plains. Filed Report, RSPB International Division, UK, 91 pp. Junk, The Hague, pp. Mohr, P. A., 1962. Both Finland and Norway regulate the fishing on the river and drift net fishing is allowed on the river.[1]. The Blue Nile System. 2006a. Reconnaissance survey on the river fisheries of Benishangul—Gumuz regional state. 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. Ricerche limnologiche B. Chimica e Biologia. Part of Springer Nature. Together they are the largest in the country and integral parts of the complex Tana-ecosystem. Journal of Fish Biology 69: 1356–1378. The river discharges into the Tanafjorden, one of the largest and most unspoiled river deltas in Europe. The Nile: Sharing a Scarce Resource. In J. Rzóska (ed. 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. In B. R. Davies & K. F. Walker (eds), The Ecology of River Systems. Lake Net, USA: 35–48. It also provides 70 per cent of the country’s hydropower. Demographics. It is estimated that Tana River County department of health with support from UNICEF carried out a SMART survey in the entire County in Feb 2018. 6–8 October 2003, Bahir Dar, Ethiopia. Rapid speciation of Lake Tana's Barbus (Cyprinidae; East-Africa) as inferred from mtDNA markers. The main tributaries of Tana are Anarjohka and Karasjohka. The development of plankton in relation to the hydrological regime in the Blue Nile. 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. Dejen, E., J. Vijverberg, L. A. J. Nagelkerke & F. A. Sibbing, 2004. They consist of permanent swamps, seasonal swamps, and areas subjected to regular inundation. This is a preview of subscription content. Dejen, E., J. Vijverberg, L. A. J. Nagelkerke & F. A. Sibbing, submitted. & F. A. Sibbing, 1996. In B. R. Davies & K. F. Walker (eds), The Ecology of River Systems. A revision of the large. Lake Tana fishery and its sustainable development (in Amharic). Components of the malacofauna of Abissynia and Somalia (in Italian). Dordrecht. 2006b. It is poor in nutrients and the source of the Blue Nile River (Great Abbay), with a catchment area of ca 16,500 km 2. ), The Nile, Biology of an Ancient River. Labeobarbus spp., Barbus spp., Garra spp.) Predicting and testing resource partitioning in a tropical fish assemblage of zooplanktivorous ‘barbs’: an ecomorphological approach. This process is experimental and the keywords may be updated as the learning algorithm improves. Fishes of Lake Roseires on the Blue Nile. The expansive delta created by the river is characterized by wetlands, presenting great potential for agriculture. Megens, J. Samallo & F. A. Sibbing, 2007. de Graaf, M., E. D. Nentwich, J. W. M. Osse & F. A. Sibbing, 2005. Tana River County is a county in the former Coast Province, Kenya.It is named after the Tana River.It has an area of 35,375.8 square kilometres (13,658.7 sq mi) and a population of 315,943. van Perlo, B., 1995. water streams recording higher signatures compared to main Tana River. 171–214. Before meeting the White Nile, the Blue Nile is joined by a number of rivers, the main ones being the Rahad and Dinder, both originating in the Ethiopian Highlands. of household farmers. Junk, The Hague, pp. Reproductive segregation among the, Nagelkerke, L. A. J. 2015).Tana River County is one of the Counties in the Coastal region and experiences erratic rainfall leading to the occurrence of recurring drought episodes. Seven large permanent rivers feed the lake as well as ca 40 small seasonal rivers. Evolutionary origin of Lake Tana's (Ethiopia) small, de Graaf, M., E. Dejen, J. W. M. Osse & F. A. Sibbing, 2008. Frances, I. In J. Rzóska (ed. Allan, J. January 23rd 2001, Bahar Dar, Ethiopia, 33–43. Report of the Amhara National Region Rehabilitation Development Organisation (TIRET). They contribute about 82% of household incomes and more than 80% of employment. Late Pleistocene desiccation of Lake Victoria and rapid evolution of cichlid fishes. Journal of Fish Biology 48: 383–404. Rzóska, J., 1976b. Ecological differentiation among the eight piscivores within the, de Graaf, M., G. H. van de Weerd, J. W. M. Osse & F. A. Sibbing, 2003b. Growth, biomass and production of two small barbs (, Dgebuadze, Y. Y., A. S. Golubtsov, V. N. Mikheev & M. V. Mina, 1994. The Blue Nile drains the NE Ethiopian Plateau (total catchment: 324,000 km2). Tis Abay Printing Press, Bahir Dar, Ethiopia: 84 pp. 211 Paris, ORSTOM, 300–311. 495–525. River Tana. de Graaf, M., J. Samallo & H. J. Megens, 2003c. Wetlands are located all around the lake, with the exception of the Northeast. 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