Understanding is probably now sufficient to allow a proper assessment of the conservation status of these previously poorly known species to be carried out. The project implementation was assisted by China for sugarcane cultivation. Sierra Leone is bounded on the southwest and west by the Atlantic Ocean; with occasional thin beds of argillaceous limestone and calcareous grit and, also, seems dark grey muddy silts and sandy muds. Articles by various contributors, including information on Sierra Leone, from page 481, 1795. The city of Bonthe is located on this island. Scanned by Google. The Rokel River (also Seli River; previously Pamoronkoh River) is the largest river in the Republic of Sierra Leone in West Africa. Scanned by Google. The panning operation in the river using manual labour was based on paddocking. Excerpt: The Sierra Leone River is a river estuary on the Atlantic Ocean in Western Sierra Leone. PhD Dissertation, CNAA, Coventry Polytechnic, UK, p 402, Moriarty DJW (1973) The physiology of digestion of blue-green algae in the cichlid fish Tilapia nilotica. Several islands, including Tasso Island (the largest), Tombo Island, and the historically important Bunce Island, are located in the estuary.[2]. By J.A. Scanned by Google. The area of the continental shelf up to Ferme, Mariane. The ecology, distribution and diversity of fish species in Sierra Leone rivers and response to human impacts. S. Gregory, M.a., Ph.d. - Jstor PHYSICAL CHARACTERISTICS OF RIVERS - The Principles and Practice of The tilapiines themselves have diversified considerably in the Upper Guinean with nine species, seven being endemic. Other major rivers include the Jong, Sewa, Soa, and A brief account of the characteristics of some of the United Nations. Tucker (1973) and Strasser-King (1979) recognize the following features: Sand bars, parallel to the current direction and occurring mainly in lower Sierra Leone Web - Sierra Leone Books muddy and sandy areas of the continental shelf have similar salinity ranges. Sierra Leone has four distinct physical regions. of lignite. Tervuren ORSTOM, Paris, p 520, Daget J, Gosse JP, Thys van den Audenaerd DFE (1986b) CLOFFA 3. Schlenker, 1861. Oliver and Boyd, Edinburgh, Ganda GP (1987) The relationship of the reproductive cycle of selected fish species to the hydrological changes of the river Taia in Sierra Leone. The cichlids in Barombi Mbo probably evolved there from two or three ancestral populations and now show clear ecological separation in their feeding and breeding, and the problem of speciation within the lake is of particular interest. MRAC, Tervuren ORSTOM, Paris, p 410, Daget J, Gosse JP, Thys van den Audenaerd DFE (1986a) CLOFFA 2. continue to flow under the sea. 71,740 square kilometers (27,699 square miles), Highest point on mainland: barrier 810 km long between the open sea and coast, thus forming a long narrow lagoon. Includes initial contacts by Carthage, Portugal and Britain. mountains, which receive more than 580 centimeters (230 inches) of The geological formation in this group is reported to be of the Tabe formation with glacial sediments dominating its eastern edge and are exposed along the river in some stretches; the geological formation noted in the river is granite rocks. RSPB, Sandy, UK, p 45, Philippart J-C, Ruwet J-C (1982) Ecology and distribution of tilapias. Final Report. XXIX. By James McQueen, 1825. the North and South Equatorial Currents. Pleistocene sediments overlie the Rokel estuarine sector of Sierra Leone It lies in the Northern and Western Hemispheres of the Earth. Culture of Sierra Leone - history, people, clothing, traditions, women The By Sir Harry H. Johnston, K.C.B., 1899. around the Rokel estuary is given in Figure 2. Characterization of the mangrove swamp rice soils along the Great and W.G. Types of rivers and their characteristics | SpringerLink Scanned by Google. 3.3 in Chapter 3 summarizes the rainfall of the region. Official name: Freetown is located, and Yawri Bay, which is located in the center of Figure 1 The West African coastline between Liberia and Guinea with silty clays at the mouth of the estuary (Strasser-King, 1979). The UN and Sierra Leone: An Enduring Relationship. (= 80F) with the range of 5.6C (42C). mountains. [3] The area is mainly mangrove swamps but also includes tidal freshwater swamp forests.[4]. Preliminary work was carried out, The authors present an up-to-date check-lis1 of the freshwater fishes of the coastal basins of Sierra Leone and Liberia. As for the open continental shelf area, the mean monthly temperature By F. Harrison Rankin, 1936. Scanned by Google. Institute pour Recherche pour la Devloppment, Paris, p 521, Loiselle PV (1979) A revision of the genus Hemichromis Peters 1858 (Teleostei: Cichlidae). Mean monthly temperatures Within and between river differences were analysed and a high degree of statistical similarity was found between the species composition of . (PDF) Freshwater fishes of Sierra Leone and Liberia: annotated . Characteristics, structure and resources of the sector There are several major rivers which influence the hydrographic conditions along the Key Facts. is roughly circular in shape, is a compact country in the southwestern Within and between river differences were analysed and a high degree of statistical . By William Latimer Neville, 1858. Journal of a Voyage from Plymouth to Sierra Leone, ed. Scanned by Google. https://doi.org/10.1038/192078b0, Mayland HJ (1995) Cichliden. The climate is characterized by two distinct seasons: the dry season This is a list of rivers in Sierra Leone. the sea. Guinea, Liberia. feet). The wood of each tree species has its own characteristics, and by measuring their forms and structures, the trees give us information about their environments. Includes several references to Sierra Leone, including the death of Prince Naimbonna (sic. Additionally, there are effects of the equatorial undercurrent (Lomonosov Current) which It is formed by the Port Loko Creek and Rokel River and is between 4 and 10 miles wide (616 km) and 25 miles (40 km) long. Scanned by Google. Scanned by Google. Two Voyages to Sierra Leone during the years 1791-2-3. Most of the small lakes in Sierra Leone are located in the south. It is situated between the seventh and tenth parallels of latitude north of the equator. Eucalyptus trees survive along the mostly dry river beds, fed by occasional downpours during the summer . A series of collections and surveys provided the basis for a detailed account of the distribution and ecological characteristics of the fish species assemblages in the rivers of Sierra Leone which comprises a central part of the Upper Guinean eco-region. Atlantic Ocean. Scanned by Google. By The Rev. The provinces are Eastern, Northern, North Western, and Southern. . Scanned by Google. of rolling terrain, which is 64 kilometers (40 miles) wide at certain reaches a width of 125 km (Longhurst, 1983); it is wider in the northern sector and The river basin measures 10,622 square kilometres (4,101sqmi) in size, with the drainage divided by the Gbengbe and Kabala hills and the Sula Mountains. Anyone you share the following link with will be able to read this content: Sorry, a shareable link is not currently available for this article. by H. Caswall, Volume 4. Scanned by Google. 480 g cal cm-2 day -1 and 69 g cal cm-2 day -1 for the dry and wet season, respectively. Language links are at the top of the page across from the title. The mean Gola Forest research Programme. They write new content and verify and edit content received from contributors. The clays deposited in tidal flats are subsequently invaded by July, August and September. [8], The iron ore mining at Marampa is dependent on pumped water supply from the river. Pages in category "Rivers of Sierra Leone" The following 10 pages are in this category, out of 10 total. This book discusses the diversity and variability of freshwater ecosystems in tropical Africa, the role of fish biodiversity, and the threats to fish biodiversity. Environ Biol Fish 101, 843864 (2018). PDF THE SIERRA LEONE RIVER ESTUARY - WA BiCC During the rainy season, the discharge of Rokel, Scarcies and Sulima Rivers estuarize A Rokel River Water Rights Agreement (Ratification) Act was signed with the developers of the mines; the mines are in operation since 1933 to 1975 by Sierra Leone Development Company (DELCO) and Astro Minerals from 1983. PubMed mangrove during periods of non-deposition. It is formed by the Bankasoka River and Rokel River and is between 4 and 10 miles wide (616km) and 25 miles (40km) long. By Tobias George Smollett, 1788. Scanned by Google. The estuary is also important for shipping. predominantly muddy areas shaded and the predominantly sandy areas of This disease, By clicking accept or continuing to use the site, you agree to the terms outlined in our. Gives the history of Sierra Leone's chiefdoms and their ruling houses. The topography and hydrographic regimes of the West African continental shelf affect There are many projects developed in the river basin which derive their water supply requirements from this river. The ECC and the cold CC contribute to the (Watts, 1958). the capital city of Freetown. This list is arranged by drainage basin, with respective tributaries indented under each larger stream's name. Cambridge University Press, Cambridge, p 438, Leveque C, Paugy D (1984) Guide des Poissons dEau douce de la zone du Programme de Lutte Contre lOnchocercose. This is a preview of subscription content, access via your institution. the distribution and constituents of benthic fauna. This is a preview of subscription content, access via your institution. Inland Waters of Southern Africa: An Ecological Perspective pp 6581Cite as, Part of the Monographiae Biologicae book series (MOBI,volume 64). The continental shelf has an estimatedarea of 25 000 km2 . Journal of the House of Comments, Vol. Scanned by Google. 195180 was 122.7 in (311.6 cm). waters of Sierra Leone are affected by influx of solar energy. The southern shore is the deepest and forms a natural harbour, which is reported to be the third largest in the world.[1]. J.S. Flag. The Debate on a Motion for the Abolition of the Slave Trade, &c. British Parliament, House of Commons, 1792. The blank outline map respresents mainland Sierra Leone. Bioscience 58:403414. With a land area of 27,699 square miles (71,740 square kilometers), it is slightly smaller than the state of South Carolina. the extent of fishing activities is water movement. The Sierra Leone estuaries have salt wedges reaching 56 kn in the wet season. The notable cascade in the river is known as the Bumbuna water falls where the river drops by 15 metres (49ft) providing for building a hydroelectric project. parallels of latitude north of the equator. Biafra (Nigeria). From page 530, details the voyage of Pedro de Cintra and the various geographical features he named along the coast which includes present-day Sierra Leone. Sierra Leone River | river, Sierra Leone | Britannica Outlines of a Grammar of the Vei Language, Together With a Vei-English Vocabulary, and an Account of the Discovery and Nature of the Vei Mode of Syllabic Writing. Guinea Current (GC) which runs along the West African coast from Senegal to the Bight of Report by Her Majesty's Commissioner and Correspondence on the Subject of the Insurrection in the Sierra Leone Protectorate 1898. 228. pp 124, Lowe McConnell RH (1987) Ecological studies in tropical fish communities. Marine Fishery Resources of Sierra Leone: a Review of Exploited Fish Stocks [1][2], The Rokel rises in the 900 metres (3,000ft) high interior plateau of the Loma Mountains, in the Guinea Highlands of north central Sierra Leone, flows southwest about[vague] 240 miles (390km) through hill ranges and, together with a smaller, parallel stream called Port Loko Creek, feeds into the Rokel estuary before entering the Atlantic Ocean. The Sierra Leone River is a river estuary on the Atlantic Ocean in Western Sierra Leone. Google Scholar, Bernacsek GM, Hughes RH, Hughes JS (1992) A directory of African wetlands. Written by Sen Farren, and published in 2011 by the Sierra Leone Irish Partnership. It is indented with many estuaries and creeks. The mean annual temperature is 26.6C The estuary is also important for shipping. It is suggested that this factor is probably the rainfall and discharge pattern as evidenced by the coincidence, almost exactly, of the Upper Guinean with the 2500mm per year isohyet. CAS Finally, further inland, covering nearly the entire easter half of Sierra Leone is a plateau and mountain region. There is marked fluctuation of total river flows along the coast South of the Zambezi there are very few natural freshwater lakes. 1830, includes information and correspondence on the Courts of Mixed Commission in Freetown. The West African country of Sierra Leone occupies an area of 71,740 sq. Category:Rivers of Sierra Leone - Wikipedia 2023 Springer Nature Switzerland AG. Sierra Leone is divided into four provinces and one area. The dry season lasts from November to There is a research gap on the growth or wellbeing of tilapia fish species in Sierra. Of the numerous rivers, the most [6] This indicates that the fish communities in the rivers of the Upper Guinean region are not so dependent on the equatorial forests that covered most, but not the entire region, but rather some other factor. moderately elevated plateau interspersed with occasional hills and Afr Tervuren 13:2940, Thys van den Audenaerd DFE (1969) An annotated bibliography of Tilapia (Pisces, Cichlidae). By the Right Rev. varies from 31/00 to 30/00 in the wet season. (July 23, 2022). In: Inland Waters of Southern Africa: An Ecological Perspective. As observed on the physical map above, it has a coastline on the Atlantic Ocean. MRAG Ltd, London, p 77, Payne AI, McCarton B (1985) Estimation of population parameters and their application to the development of fishery management models in two African rivers. temperature is about 27C (81F) on the coast and almost as
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