OJE  Vol.5 No.7 , July 2015
Ecological Devastation in Lake Victoria: Part B: Plankton and Fish Communities
Abstract: A few specimens of the exotic fish, Nile Perch, (Lates niloticus, Linnaeus 1758) were transferred into Lake Victoria in early 1950’s. In early 1980’s this fish occupied the Lake Victoria ecosystem eliminating the local endemic Haplochromines (app. 400 species). As a result of this change, together with intensification of pollution constrains from the catchment and dust deposition the ecology of Victoria’s ecosystem was modified: cyanobacteria replaced diatoms, anoxia enhanced, secchi depth became shallower, euphotic zone became thinner, fishery enhanced fully comprised of Nile Perch and Rastrineobola. The ecological significances are discussed and future propositions are presented.
Cite this paper: Gophen, M. (2015) Ecological Devastation in Lake Victoria: Part B: Plankton and Fish Communities. Open Journal of Ecology, 5, 315-325. doi: 10.4236/oje.2015.57026.

[1]   Barel, C.D.N., Dorit, R., Greenwood, P.H., Fryer, G., Hughes, N., Jackson, P.B.N., Kawanabe, H. and Lowe-McConell, R.H. (1985) Destruction of Fisheries in Africa’s Lakes. Nature, 325, 19-20.

[2]   Ochumba, P.B.O., Gophen, M. and Pollingher, U. (1994) Ecological Changes in Lake Victoria after the Introduction of Nile Perch (Lates niloticus): The Catchment, Water Quality and Fisheries Management. In: Cowx, I.G., Ed., Rehabilitation of Freshwater Fisheries, Fishing News Books, Blackwell Scientific Publications Ltd., 338-347.

[3]   Gophen, M., Ochumba, P.B.O. and Kaufman, L.S. (1995) Some Aspects of Perturbations in the Structure and Biodiversity of the Ecosystem of Lake Victoria. Aquatic Living Resources, 8, 27-41.

[4]   Talling, J.F. (1965) The Pjtosymthetic Cativity of Phtoplankton in East African Lakes. Internationale Revue der gesamten Hydrobiologie und Hydrographie, 50, 1-32.

[5]   Talling, J.F. (1966) The Annual Cycle of Stratification and Phytoplankton Growth in Lake Victoria (East Africa). Internationale Revue der gesamten Hydrobiologie und Hydrographie, 51, 545-621.

[6]   Akiyama, T., Kajumulo, A. and Olsen, S. (1977) Seasonal Variation of Plankton and Physico-Chemical Condition in Mwanza Gulf, Lake Victoria. Bulletin Freshwater Fisheries Research Laboratory, 27, 49-61.

[7]   Melack, J.M. (1979) Photosynthetic Rates in Four Tropical African Freshwatrs. Freshwater Biology, 9, 555-571.

[8]   LBDA (Lake Basin Development Authority) (1984) Technical Report on Current and Future Implications of Development to the Aquatic Environment of Lake Victoria. Wynam Gulf Baseline Study Report, LBDA, Kisumu, 55 p.

[9]   Ochumba, P.B.O. and Kibara, D. (1989) Observation on Blue-Green Algal Blooms in the Open Waters of Lak Victoria, Kenya. African Journal of Ecology, 27, 23-34.

[10]   Rzoska, J. (1956) The Planktonic Crustacea of Lake Victoria. Proceedings of the Linnean Society of London, 168, 116-125.

[11]   Rzoska, J. (1957) Notes on the Crustaceans of Lake Victoria. Proceedings of the Linnean Society of London, 168, 116-125.

[12]   Rzoska, J. (1978) Zooplankton of the Nile System. In: Rzoska, J., Ed., The Nile, Biology of an Ancient River, Dr Junk Publishers, The Hgue, 333-343.

[13]   Mavuti, K.M. and Litterick, M.R. (1991) Composition, Distribution and Ecological Role of Zooplankton Community in Lake Victoria, Kenia Waters. Verhandlungen des Internationalen Verein Limnologie, 24, 1117-1122.

[14]   Green, J. (1971) Association of Cladocera in the Zooplankton of the Lake Sources of the White Nile. Journal of Zoology, 165, 373-414.

[15]   Fryer, G. and Iles, T.D. (1972) The Cichlid Fishes of the Great Lakes of Africa: Their Biology and Evolution. Oliver and Boyd, Edinburgh, 641 p.

[16]   Kaufman, L.S. (1991) The Anatomy of Vertebrate Mass Extinction as Revealed by a Faunal Survey of Lake Victoria. Annual Report, New England Aquarium, Boston, 51 p.

[17]   Greenwood, P.H. (1974) The Haplochromine Fishes of Lake Victoria, East Africa: The Biology and Evolution of a Species Flock. Bulletin of the British Museum of Natural History Zoology, 6, 1-134.

[18]   Greenwood, P.H. (1981) The Haplochromine Fishes of East African Lakes: Taxonomy, Biology and Evolution. Kraus International Publications, Munich, 839 p.

[19]   Silsbe, G.M., Hecky, R.E., Guildford, S.J. and Mugidde, R. (2006) Variability of Chlorophyll A and Photosynthetic Parameters in a Nutrient-Saturated Tropical Great Lake. Limnology and Oceanography, 51, 2052-2063.

[20]   Kling, H.J., Mugidde, R. and Hecky, R.E. (2001) Recent Changes in the Phytoplankton Community of Lake Victoria in Response to Eutrophication. In: Munawar, M. and Hecky, R.E., Eds., The Great Lakes of the World (GLOW): Food Web, Health and Integrity, Backhuys Publishers, Leiden, 47-65.

[21]   Hecky, R.E., Mugidde, R., Ramlal, P.S., Talbot, M.R. and Kling, G.W. (2010) Multiple Stressors Cause Rapid Ecosystem Change in Lake Victoria. Freshwater Biology, 55, 19-42.

[22]   Kaufman, L.S. (1992) Catastrophic Change in Species-Rich Freshwater Ecosystems: The Lesson of Lake Victoria. BioScience, 42, 846-858.

[23]   Shi, Z.F., Liu, Z.Y., Li, J.L. and Mei, Z.P. (1997) Effects of Dissolved Oxygen on the Feeding Intensity of Silver Carp (H. molitrix), and Bighead Carp (A. nobilis). In: Mathias, J.A., Charles, A.T. and Baotong, H., Eds., Proceedings of a Workshop on Integrated Fish Farming, CRC Press, LLC, Boca Raton, 205-212.