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Lake Victoria East Africa

Lake Victoria East Africa. Introduce aspects of the ecology and management of Lake Victoria with special emphasis on changes in its endemic fish fauna. Mean depth = 40m Maximum depth = 79m Surface area = 68,000 km 2 Altitude = 1,134m Shoreline development index = 3 . 7.

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Lake Victoria East Africa

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  1. Lake Victoria East Africa Introduce aspects of the ecology and management of Lake Victoria with special emphasis on changes in its endemic fish fauna.

  2. Mean depth = 40m Maximum depth = 79m Surface area = 68,000 km2 Altitude = 1,134m Shoreline development index = 3.7

  3. Basin size = 263,000 km2 Population = 27.7 million

  4. Start of the rainy season (cool/windy)

  5. Lake Victoria – water hyacinth Eichhornia crassipes Lake Victoria – papyrus Cyperus papyrus

  6. Source: Bootsma and Hecky1993

  7. Core taken in 1996 from a depth of 68m Discontinuity near 25cm depth in the core represents a hiatus of ca. 40 years (stippled zone) Note: Increasing abundance of diatoms starting in the 1960s but decrease again in the 1980s. Diatoms replace by bloom-forming cyanobacteria Source: Verschuren et al. 2002. History and timing of human impact on lake Victoria. Proc. Royal Society London 269: 289-294

  8. Microcystis Cyanobacteria bloom Anabaena

  9. Haplochromine cichlids

  10. [Haplochromids in black] Lake Victoria food web prior to the introduction of the Nile perch

  11. Lake Victoria food web following the introduction of the Nile perch

  12. Witte et al. 1992

  13. Witte et al. 1992

  14. Goudswaard et al. 2008

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