Synopsis
There has been a decline, and in some cases an almost total disappearance, of many of the native fish species of lakes Victoria and Kyoga in East Africa since the development of the fisheries of these lakes was initiated at the beginning of this century. The Nile perch, Lates niloticus, a large, voracious predator which was introduced into these lakes about the middle of the century along with several tilapiine species, is thought to have caused the reduction in the stocks of several species. But overfishing and competition between different species also appear to have contributed to this decline. By the time the Nile perch had become well established, stocks of the native tilapiine species had already been reduced by overfishing. The Labeo victorianus fishery had also deteriorated following intensive gillnetting of gravid individuals on breeding migrations. L. niloticus is, however, capable of preying on the species which haven been overfished and could have prevented their stocks from recovering from overfishing. L. niloticus is also directly responsible for the decline in populations of haplochromine cichlids which were abundant in these lakes before the Nile perch became established. Even without predation by Nile perch, it has been shown that the haplochromine cichlids could not have withstood heavy commercial exploitation if a trawl fishery had been established throughout Lake Victoria. Their utilisation for human food has also posed some problems. The abundance of the native tilapiine species may also have been reduced through competition with introduced species which have similar ecological requirements. At present, the Nile perch and one of the introduced tilapiine species, Oreochromis niloticus, form the basis of the fisheries of lakes Victoria and Kyoga.
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References
Balon, E.K. & M.N. Bruton, 1986. Introduction of alien species or why scientific advice is not heeded. Env. Biol. Fish. 16: 225–230.
Barel, C.D.N., R. Dorit, P.H. Greenwood, G. Fryer, N. Hughes, P.B.N. Jackson, H. Kawanabe, R.H. Lowe-McConnell, M. Nagoshi, A.J. Ribbink, E. Trewavas, F. Witte & K. Yamaoka. 1985. Destruction of fisheries in Africa's lakes. Nature 315: 19–20.
Barlow, C.G. & A. Lisle, 1986. Biology of the Nile perch, Lates niloticus (Pisces: Centropomidae) with reference to its proposed role as a sport fish in Australia. Biol. Conserv. 39: 269–289.
Beauchamp, R.S.A. 1956. The efficient utilisation of the fisheries of Lake Victoria, EAFFRO Ann. Rep. 1955/56. Appendix A: 1–7.
Benda, R.S. 1979. Analysis of catch data from 1968 to 1976 from 9 fish landings in the Kenyan waters of Lake Victoria. J. Fish Biol. 15: 395–387.
Benda, R.S. 1981. A comparison of bottom trawl catch rates in the Kenyan waters of Lake Victoria. J. Fish Biol. 18: 609–613.
Beverton, R.J.H. 1959. Report on the state of the Lake Victoria fisheries. Fisheries Laboratory, Lowestoft (mimeo.).
Bwathondi, P.O.J. 1987. The state of Lake Victoria fisheries Tanzanian sector. Committee for Inland Fisheries of Africa, Fourth Session of the Sub-committee for Development and Management of the Fisheries of Lake Victoria, Kisumu, Kenya, 6–10 April 1987.
Cadwalladr, D.A. 1965. Notes on the breeding biology and ecology of Labeo victorianus Boulenger (Pisces: Cyprinidae) of Lake Victoria. Rev. Zool. Bot. afr. 72: 109–134.
Cadwalladr, D.A. 1969. A discussion of possible management methods to revive the Labeo victorianus fishery of Lake Victoria with special reference to the Nzoia River, Kenya. Uganda Fisheries Dept. Occasional Paper 2: 1–6.
Coulter, G.W., B.R. Allanson, M.N. Bruton, P.H. Greenwood, R.C. Hart, P.B.N. Jackson & A.J. Ribbink. 1986. Unique qualities and special problems of the African Great Lakes. Env. Biol. Fish. 17: 161–183.
Fryer, G. 1960. Concerning the proposed introduction of Nile perch into Lake Victoria. E. Afr. Agric. For. J. 25: 267–270.
Fryer, G. 1961. Observations on the biology of the cichlid fish Tilapia variabilis Boulenger in northern waters of Lake Victoria (East Africa) Revue Zool. Bot. afr. 64: 1–33.
Fryer, G. 1973. The Lake Victoria fisheries: some facts and fallacies. Biol. Conserv. 5: 305–308.
Fryer, G. 1984. The conservation and rational exploitation of the biotas of African Great Lakes. pp. 135–154. In: A.V. Hall (ed.) Conservation of Threatened Natural Habitats, South African National Scientific Programmes Report no. 92, CSIR, Pretoria.
Fryer, G. & T.D. Iles. 1972. The cichlid fishes of the Great Lakes of Africa: their biology and evolution. Oliver and Boyd, London. 641 pp.
Garrod, D.J. 1960. The fisheries of Lake Victoria, 1954–1959. Afr. agric. For. J. 26: 42–48.
Garrod, D.J. 1961a. The history of the fishing industry of Lake Victoria, East Africa, in relation to the expansion of marketing facilities. E. Afr. agric. For. J. 27: 95–99.
Garrod, D.J. 1961b. The rational exploitation of the Tilapia esculenta stock of the North Buvuma Island area, Lake Victoria. E. Afr. agric. For. J. 27: 69–76.
Gee, J.M. 1969. A comparison of certain aspects of the biology of Lates niloticus (Linne) in some East African Lakes. Rev. Zool. Bot. aft. 80: 244–262.
Goudswaard, P.C. 1987. A comparison of trawl surveys in 1969/70 and 1984/85 in the Tanzania part of Lake Victoria. Report of Haplochromis Ecology Survey Team (HEST), No. 36, Mwanza, Tanzania/Leiden, the Netherlands. 8 pp.
Goudswaard, P.C. & F. Witte. 1984. Observations on Nile perch — Lates niloticus (L)1758—in Tanzanian waters of Lake Victoria. Committee for Inland Fisheries of Africa. Report of the Third Session of the Sub-Committee for Development and Management of the Fisheries of Lake Victoria, Jinja, Uganda, 4–5 October 1984. FAO Fish. Rep. (335): 62–67.
Goudswaard, P.C. & W. Ligtvoet. 1987. Recent developments in the fishery for haplochromines (Pisces: Cichlidae) and the Nile perch, Lates niloticus (L) (Pisces: Centropomidae) in Lake Victoria. In: Reports from the Haplochromis Ecology Survey Team (HEST) operating in Lake Victoria no. 35, Mwanza, Tanzania/Leiden, the Netherlands. 14 pp.
Graham, M. 1929. The Victoria Nyanza and its fisheries. A report on the fish survey of Lake Victoria 1927–1928 and Appendices. Crown Agents for the Colonies, London. 255 pp.
Greenwood, P.H. 1951. Fish remains from Miocene deposits of Rusinga Island and Kavirondo Province, Kenya. Ann. Mag. nat. Hist. 4: 1192–1200.
Greenwood, P.H. 1966. The fishes of Uganda. The Uganda Society, Kampala. 131 pp.
Gwahaba, J.J. 1973. Effects of fishing on the Tilapia nilotica populations of L. George, Uganda, over the past 20 years. E. Afr. Wildl. J. 11: 317–328.
Hamblyn, E.L. 1966. The food and feeding habits of Nile perch, Lates niloticus (Linne) (Pisces: Centropomidae). Rev. Zool. Bot. afr. 74: 1–28.
Hest, 1987. Haplochromis Ecology Survey Team; Progress Report for 1986. Report from the Haplochromis Ecology Survey Team (HEST), no. 39. Mwanza, Tanzania/Leiden, the Netherlands. 10 pp.
Hopson, A.J. 1964. Federal fisheries service, Lake Chad research station, Malamfatori. Report for 1963. Lagos, Nigeria.
Hopson, A.J. 1972 A study of the Nile perch [Lates niloticus (L), Pisces: Centropomidae] in Lake Chad. pp. 1–93. In: Overseas Research Publication no. 19, Overseas Development Administration, London.
Hughes, N.F. 1986. Changes in feeding biology of the Nile perch, Lates niloticus (L) (Pisces: Centropomidae) in Lake Victoria, East Africa, since its introduction in 1960, and its impact on the native fish community in the Nyanza Gulf. J. Fish Biol. 29: 541–548.
Jackson, P.B.N. 1971. The African Great Lakes fisheries: past, present and future. Afr. J. Trop. Hydrobiol. Fish. 1: 35–49.
Kenya Fisheries Department. 1961. Annual Report for 1960. Colony of the Protectorate of Kenya. Govt. Printers, Nairobi. 27 pp.
Kudhongania, A.W. 1972. Past trends and recent research on the fisheries of Lake Victoria in relation to possible future developments. Afr. J. Hydrobiol. Fish., Special Issue 2: 93–106.
Kudhongania, A.W. & A.J. Cordone. 1974. Batho-spatial distribution patterns and biomass estimate of the major demersal fishes in Lake Victoria. Afr. J. Trop. Hydrobiol. Fish. 3: 15–31.
Lowe-McConnell, R.H. 1988. Broad characteristics of the ichthyofauna. pp. 93–110. In: C. Leveque, M.N. Bruton & G.W. Ssentongo (ed.) Biologie et Ecologie des Poissons d'Eau Douce Africains/Biology and Ecology of African Freshwater Fishes, ORSTOM, Paris.
Mann, M.J. 1970. A resume of the Tilapia fisheries of Lake Victoria up to the year 1960. EAFFRO Annual Report 1969, Appendix B: 21–27.
Marten, G.G. 1979. The impact of fishing on the inshore fishery of Lake Victoria (East Africa). J. Fish. Res. Board Can. 36: 891–900.
Muller, R.C. & R.S. Benda 1981. Comparison of bottom trawl densities in the inner Kavirondo Gulf of Lake Victoria. J. Fish Biol. 19: 399–401.
Ogari, J. 1984. Distribution, food and feeding habits of Lates niloticus in the Nyanza Gulf of Lake Victoria (Kenya). Committee for Inland Fisheries of Africa, Report of the Third Session of the Sub-committee for Development and Management of Fisheries of Lake Victoria, Jinja, Uganda, 4–5 October, 1984. FAO Fish. Rep. (335): 68–80.
Ogutu-Ohwayo, R. 1984a. Predation by the Nile perch, Lates niloticus, introduced into Lake Kyoga (Uganda) and its effects on the populations of fish in the lake. M. Sc. Thesis, University of Dar es Salaam, Tanzania. 147 pp.
Ogutu-Ohwayo, R. 1984b. The effects of predation by Nile perch, Lates niloticus (Linne), introduced into Lake Kyoga (Uganda) in relation to the fisheries of Lake Kyoga and Lake Victoria. Committee for Inland Fisheries of Africa, Report of the Third Session of the Sub-committee for Development and Management of Fisheries of Lake Victoria. Jinja, Uganda, 4–5 October, 1984. FAO Fish. Rep. (335): 18–39.
Ogutu-Ohwayo, R. 1988. Reproductive potential of the Nile perch Lates niloticus (L.) and the establishment of the species in Lakes Kyoga and Victoria (East Africa). Hydrobiologia 162: 193–200.
Oijen, M.J.P. van, F. Witte & E.L.M. Witte-Maas. 1984. An introduction to ecological and taxonomic investigations on the haplochromine cichlids from the Mwanza Gulf of Lake Victoria. Neth. J. Zool. 31: 149–174.
Okaronon, J., J. Acere & D. Oce-Odongo. 1984. The current state of the fisheries in the northern portion of Lake Victoria (Uganda). Committee for Inland Fisheries of Africa, Report of the Third Session of the Sub-committee for Development and Management of the Fisheries of Lake Victoria, Jinja, Uganda, 4–5 October, FAO Fish. Rep. (335): 89–98.
Okedi, J.Y.O. 1970. Further observations on the ecology of the Nile perch (Lates niloticus Linne) in Lake Victoria and Lake Kyoga. Ann. Rep. E. Aft. Freshwat. Fish. Res. Org. (1970): 42–55.
Okedi, J.Y.O. 1981. The Engraulicypris ‘dagaa’ fishery of Lake Victoria: a pilot study of the Ukerewe island-complex ‘dagaa’ fishing industry. In: Annual report 1978–79, Freshwater Fisheries Research Institute, Mwanza, Tanzania. pp. 25–79.
Okemwa, E. 1984. Potential fishery of Nile perch Lates niloticus Linn. (Pisces, Centropomidae) in Nyanza Gulf of Lake Victoria, East Africa. Hydrobiologia 108: 121–126.
Ribbink, A.J. 1987. African lakes and their fishes: conservation scenarios and suggestions. Env. Biol. Fish. 19: 3–26.
Skelton, P.H. 1988. The distribution of African freshwater fishes. pp. 65–91. In: C. Leveque, M.N. Bruton & G.W. Ssentongo (ed.) Biologie et Ecologie des Poissons d'Eau Douce Africains/Biology and Ecology of African Freshwater Fishes, ORSTOM, Paris.
Stoneman, J. & J.F. Rogers. 1970. Increase in fish production achieved by stocking exotic species (Lake Kyoga, Uganda). Uganda Fisheries Department, Occasional Paper (3): 16–19.
Trewavas, E. 1983. Tilapiine fishes of the genera Sarotherodon, Oreochromis and Danakilia. Bull. Br. Mus. Nat. Hist. (zool.) 878: 1–583.
Turner, J.L. 1977a. Some effects of demersal trawling in Lake Malawi (Lake Nyasa) from 1968 to 1974. J. Fish Biol. 10: 261–271.
Turner, J.L. 1977b. Changes in the size structure of cichlid populations of Lake Malawi resulting from bottom trawling. J. Fish. Res. Board Can. 34: 232–238.
Twongo, T. & R. Ogutu-Ohwayo. 1979. Changes in the composition and distribution of the commercial fish species in Lake Kyoga (Uganda) following introduction of non-endemic fishes. Workshop on African Limnology, Inland Waters, their Ecology and Utilisation, Nairobi, Kenya.
Uganda Game and Fisheries Department. 1951. Annual Report for 1950, Uganda Government Printer, Entebbe.
Uganda Game and Fisheries Department. 1958. Annual Report for 1956/57, Uganda Government Printer, Entebbe.
Welcomme, R.L. 1964. Notes on the present distribution and habits of the non-endemic species of Tilapia which have been introduced into Lake Victoria. Rep. E. Afr. Freshwat. Fish. Res. Org. 1962/63: 36–39.
Welcomme, R.L. 1966. Recent changes in the stocks of Tilapia in Lake Victoria. Nature 212: 52–54.
Worthington, E.B. 1929. A report on the fishing survey of Lakes Albert and Kioga. March–July, 1928. Crown Agents, London. 136 pp.
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Ogutu-Ohwayo, R. The decline of the native fishes of lakes Victoria and Kyoga (East Africa) and the impact of introduced species, especially the Nile perch, Lates niloticus, and the Nile tilapia, Oreochromis niloticus . Environ Biol Fish 27, 81–96 (1990). https://doi.org/10.1007/BF00001938
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DOI: https://doi.org/10.1007/BF00001938