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Massive fish kills within the Nyanza Gulf of Lake Victoria, Kenya

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Abstract

The morphometry and hydrology of the Nyanza Gulf of Lake Victoria can be greatly affected by violent storms. This can result in a condition in which nutrient-rich bottom mud is mixed with the sediment-laden runoff water from neighbouring marshes and rivers. This situation can lead to massive fish kills. It is such an event in 1984 which will be described that caused the sudden death of over 400 000 fish weighing over 2400 tonnes.

The unusually low precipitation in the catchment area during that year resulted in a drop in the lake level from 12.4 to 11.8 m. This low water level, combined with a severe storm created the conditions which caused this large fish kill. The species affected were Lates niloticus and Oreochromis niloticus. Mortality was attributed to several factors which included high levels of suspended material in the water column (detritus and algae) which clogged the gills of the fish, low dissolved oxygen, low pH, and high concentrations of algae.

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References

  • Akiyama, T., A. A. Kajumulo & S. Olsen, 1977. Seasonal variation of plankton and physico-chemical condition in Mwanza Gulf, Lake Victoria. Bull. Freshwat. Fish. Res. Lab. 27: 49–61.

    Google Scholar 

  • Alabaster, J. S., FAO/UN, Rome, 1981. Review of the state of aquatic pollution of East African waters. CIFA Occ. Pap. No. 9, 39 pp.

  • Beadle, L. C., 1974. The inland waters of tropical Africa. An introduction to tropical limnology. Longman, London, 365 pp.

    Google Scholar 

  • Bell, G. R., 1978. Investigation of mortalities in the wild. In T. Bagenal (ed.), Methods for Assessment of Fish Production in Freshwaters. Blackwell Scientific Publications, Oxford: 253–273.

    Google Scholar 

  • Carmichael, W. W. & P. R. Gorham, 1978. Anatoxins from clones of Anabaena flos-aquae isolated from lakes of Western Canada. International Symposium on Experimental Use of Algal Cultures in Limnology. Mitt. int. Ver. Limnol. 21: 285–295.

    Google Scholar 

  • Coe, M. J., 1966. The biology of Tilapia grahami Boulenger in Lake Magadi, Kenya. Acta trop. 23: 146–177.

    Google Scholar 

  • Copley, H., 1953. The tilapia fishery of the Kavirondo Gulf. J. East Afr. nat. Hist. Soc. 22: 57–61.

    Google Scholar 

  • Denny, P., 1972. Lakes of Southwestern Uganda. 1. Physical and chemical studies on Lake Bunyonyi. Freshwat. Biol. 2: 143–158.

    Google Scholar 

  • Fish, G. R., 1956a. Some aspects of the respiration of six species of fish from Uganda. J. exp. Biol. 33: 186–195.

    Google Scholar 

  • Fish, G. R., 1956b. Chemical factors limiting phytoplankton growth in Lake Victoria. East Afr. Agri. For. J. 21: 152–158.

    Google Scholar 

  • Fish, G. R., 1957. A seiche movement and its effect on the hydrology of Lake Victoria. Col. Of. Fish. Publ., Lond. 10: 1–68.

    Google Scholar 

  • Foxall, C. D., 1981. Levels of organochlorine biocide residues in fish from Lake Victoria. Some preliminary findings. Proceedings of the Workshop of the Kenya Marine and Fisheries Research Institute, on Aquatic Resources of Kenya. July 13–19, 1981. Mombasa, Kenya. 256–263.

  • Graham, M., 1929. The Victoria Nyanza and its fisheries. A report on the fishing survey of Lake Victoria 1927–28, and appendices. Crown Agents, Lond., 255 pp.

    Google Scholar 

  • Gwahaba, J. J., 1973. Effect of fishing on the Tilapia niloticus (Linne 1757), population in Lake George Uganda over the past 20 years. East Afr. Wildl. J. 11: 317–328.

    Google Scholar 

  • Hach Chemical Co., 1982. Hach Drel portable engineers laboratory methods manual, 8th ed., Ames, Iowa.

  • Hunter, J. B., 1970. Observations on the taxonomy and biology of Lates niloticus (Cuvier 1828) in Lake Albert. Occ. Pap. No. 3, Fish. Dept., Uganda, 7 pp.

    Google Scholar 

  • Kallqvist, T. & B. S. Meadows, 1977. Pesticide levels in the Kenya rural environment. Afr. Envir. (2 and 3) 1: 163–170.

    Google Scholar 

  • Kenya Government Report, 1983. Report on Kenya Fisheries for 1977. Nairobi, Kenya, 32 pp.

  • Lowe-McConnell, R. H., 1958. Observations on the biology of Tilapia niloticus Linne (Pisces, Cichlidae) in East African Waters. Revue Zool. Bot. afr. 55: 353–373.

    Google Scholar 

  • Lowe-McConnell, R. H., 1975. Fish communities in tropical fresh waters. Longman, Lond., 337 pp.

    Google Scholar 

  • Melack, J. M., 1976. Limnology and dynamics of phytoplankton in equatorial African lakes. Ph. D. thesis, Duke Univ., Durham, 453 pp.

    Google Scholar 

  • Melack, J. M., 1979. Photosynthetic rates in four tropical African freshwaters. Freshwat. Biol. 9: 555–571.

    Google Scholar 

  • Newell, B. S., 1957. The nocturnal reduction of dissolved oxygen in dams. E. Afr. Agr. For. J. 23: 127–129.

    Google Scholar 

  • Newell, B. S., 1960. The hydrology of Lake Victoria. Hydrobiologia 15: 363–383.

    Google Scholar 

  • Ochumba, P. B. O., 1984. The Status of Lake Environment in Kenya: Lake Victoria. In Proceedings of the Shiga Conference 1984 on Conservation and Management of World Lake environment. August 27–31, 1984 Otsu, Japan: 86–89.

  • Ogalo, L., 1981. Trend of rainfall in East Africa. Kenya J. Sci. Tech. (A) 2: 83–90.

    Google Scholar 

  • Okedi, J., 1971. Further observations on the ecology of the Nile perch Lates niloticus in Lake Victoria and Lake Kyoga. Ann. Rep. East Afr. Freshwat. Fish. Res. Org. 1970, 42–54.

  • Okemwa, E. N., 1984. Potential fishery of Nile perch Lates niloticus Linne (Pisces: Centropomidae) in Nyanza Gulf of Lake Victoria, East Africa. Hydrobiologia 108: 121–126.

    Article  Google Scholar 

  • Rinne, J. N. & B. Wanjala, 1982. Observations on movement patterns of Tilapia spp. in Nyanza Gulf, Lake Victoria, East Africa. J. Fish. Biol. 20: 317–327.

    Google Scholar 

  • Tait, C. C., 1967. Mass fish mortalities. Fish. Res. Bull. No. 3 July 1964–June 1965. Republic of Zambia, Ministry of Natural Resources and Tourism, Fish. Res. Div. Dept. Game Fish. 28–30.

  • Talling, J. F., 1957. Some observations on the stratification of Lake Victoria. Limnol. Oceanogr. 2: 213–221.

    Google Scholar 

  • Talling, J. F., 1966. The annual cycle of stratification and phytoplankton growth in Lake Victoria (East Africa). Int. Revue ges. Hydrobiol. 51: 545–621.

    Google Scholar 

  • Talling, J. F. & I. B. Talling, 1965. The chemical composition of African lake waters. Int. Revue ges. Hydrobiol. 50: 421–463.

    Google Scholar 

  • Visser, S. A., 1974. Composition of water of lakes and rivers in East Africa and West Africa. Afr. J. trop. Hydrobiol. Fish. 3: 43–60.

    Google Scholar 

  • Worthington, E. B., 1930. Observations on the temperature, hydrogen-ion concentration, and other physical conditions of the Victoria and Albert Nyanzas. Int. Revue ges. Hydrobiol. 24: 328–357.

    Google Scholar 

Download references

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  1. Kenya Marine and Fisheries Research Institute, Kisumu Laboratory, P.O. Box 1881, Kisumu, Kenya

    Peter B. O. Ochumba

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  1. Peter B. O. Ochumba
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Ochumba, P.B.O. Massive fish kills within the Nyanza Gulf of Lake Victoria, Kenya. Hydrobiologia 208, 93–99 (1990). https://doi.org/10.1007/BF00008448

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