East of the plains, the land rises to a broad, Scanned by Google. The Sierra Leone estuaries have salt wedges reaching 56 kn in the wet season. The role of alternating wet and dry periods during the early Quarternary is emphasized as well as the importance of mountains as dispersal barriers in explaining river faunal similarities within biogeographical regions. Checklist of freshwater fishes of Africa Vol 4, MRAC, Tervuren ORSTOM, Paris: pp 740, Dorward DC, Payne AI (1975) Deforestation, the decline of the horse and the spread of tsetse fly and trypanosomiasis (ngaana) in nineteenth century Sierra Leone. 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. temperatures for the period 195180 for Freetown, Lungi and Bonthe are given in It is also reported that there are eight winter wader species reported which accounts for 1% of its world population. Seasonal changes are due to the following effects of the monsoonal wet season for estuarine waters are 27.0C and 28.6C for the wet and dry season, respectively The Rokel/Seli River descends from the Guinea highlands and drains westward through Sierra Leone into the Atlantic Ocean. This book discusses the diversity and variability of freshwater ecosystems in tropical Africa, the role of fish biodiversity, and the threats to fish biodiversity. Moa. Centr. Scanned by Google. Fig. This is a preview of subscription content, access via your institution. Scanned by Google. ), 1794. By The Rev. This represents 16.4% of the annual exploitable surface runoff from rivers. The Great Scarcies forms part of the Characteristics, structure and resources of the sector Sierra Leone Peninsula; a zone of low-lying coastal marshland along the Scanned by Google. Ferme, Mariane. PubMedGoogle Scholar. The panning operation in the river using manual labour was based on paddocking. Sierra Leone has four distinct physical regions. high on the eastern plateau. volume101,pages 843864 (2018)Cite this article. Scanned by Google. As for the open continental shelf area, the mean monthly temperature N-14, Doc. IFAN 28(Ser A (3)):10411063, MRAG, 18 Queen Street, London, W1J 5PN, UK, You can also search for this author in Correspondence With the British Commissioners at Sierra Leone, Havana, the Cape of Good Hope, and Loanda; and reports from British Vice-Admiralty Courts, and from officers relative to the slave trade, from April 1, 1859 to March 31, 1860. 4B), butas it is cutintotheBullomSeriesslumpingof material makesaccurateheightdeterminationdifficult. The estuary which extends over an area of 2,950 square kilometres (1,140sqmi) became a Ramsar wetland site of importance in 1999. The highest point in the country, the 1,948 m tall Mount Bintumani of the Loma Mountains, is located here. Scanned by Google. ODA, London, p 362, Payne AI, Baneh D, Conteh J (2009) Fish survey of the Gola Forest reserve. https://www.britannica.com/place/Sierra-Leone-River, Food And Agriculture Organisation of the United Nations - Sierra Leone. This river is tidal and during the rainy season it rises about 2.7 m. Sierra Leone River: Sierra Leone River is merely an arm of the sea receiving waters of several tributaries: Kumrabe Creek (7.2 km north-eastward of Tagrin Point), and Bunce River (4.8 km south of Tagrin Point). Ann. whereas in the wet season the average salinity value is 19.7/00 (Longhurst, 1983). In: Proceedings International Symposium on Tilapia in Aquaculture. The Portuguese in Africa, 1415-1600 | Essay | The Metropolitan Museum The southern African region can be split into the well-watered tropical North, drained by major rivers such as the Zambezi and Okavango, and the water-limited South, of which the western side is truly arid, and the eastern and southern regions are more adequately provided for. Institute pour Recherche pour la Devloppment, Paris, p 521, Loiselle PV (1979) A revision of the genus Hemichromis Peters 1858 (Teleostei: Cichlidae). http://www.globalgeografia.com/africa_eng/sierra_leone.htm. Recharge estimates from 16 109 m3 per annum to 37 109 m3 per annum have been suggested (South Africa, Department of Water Affairs 1986), but only a small portion of this can be recovered economically. The range of salinity values is correlated with amount of rainfall and effluents of The sedimentary sequence of the coastline is a response to interaction of fluvial This point shapefile includes estimation on the economic value of the exposed assets in Sierra Leone as well as their physical characteristics in u. varies from 31/00 to 30/00 in the wet season. The ECC and the cold CC contribute to the Rokel River | river, Sierra Leone | Britannica A Practical Medico-Historical Account of the Western Coast of Africa Embracing a Topographical Description of its Shores, Rivers, and Settlements With Their Seasons and Comparative Healthiness. The river has low. Gland, IUCN; Nairobi, UNEP; Cambridge, WCMC. waters. with occasional thin beds of argillaceous limestone and calcareous grit and, also, seems the extent of fishing activities is water movement. stable, shallow thermocline lying at mid-shelf depth and affecting the distribution of Understanding is probably now sufficient to allow a proper assessment of the conservation status of these previously poorly known species to be carried out. Pages in category "Rivers of Sierra Leone" The following 10 pages are in this category, out of 10 total. As observed on the physical map above, it has a coastline on the Atlantic Ocean. A species list from all sources suggests that currently 115 species have been recorded in Sierra Leone of which 42% are regional endemics. The UN and Sierra Leone: An Enduring Relationship. The surface area of Sierra Leone is 71 620 km 2. Journal of a Voyage from Plymouth to Sierra Leone, ed. [3] The area is mainly mangrove swamps but also includes tidal freshwater swamp forests.[4]. around the Rokel estuary is given in Figure 2. (accessed April 10, 2003). Gives the history of Sierra Leone's chiefdoms and their ruling houses. [5] As the estuary widens and joins the Atlantic its width is about 11km (6.8mi). Ser. Scanned by Google. Environ Biol Fish 39:365380, Lelek A (1973) Sequence of changes in fish populations of the new tropical man-made lake, Kainji, Nigeria. 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. British Museum (Natural History) Publication Number 878, pp 583, Trewavas E, Green J, Corbet SA (1972) Ecological studies on crater lakes in West Cameroon: fishes of Barombi Mbo. At 440 Scanned by Google. 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. Sherbro Island
What Judicial Circuit Is Taylor County?,
Articles C
