The schistosome intermediate host, Bulinus nyassanus, is a 'preferred' food for the cichlid fish, Trematocranus placodon, at Cape Maclear, Lake Malawi

REFERENCES

• Anon. (1977). A Field Guide to African Freshwater Snails. 4. South East African. Charlottenlund, Denmark: Danish Bilharziasis Laboratory.
   Google Scholar
• Brodersen, J., Chimbari, M. J. & Madsen, H. (2003). Prosobranch mollusc species- and size- preference of Sargochromis codringtonii (Cichlidae) in Lake Kariba, Zimbabwe. African Journal of Aquatic Science, 28, 1–4.
   Google Scholar
• Brönmark, C. & Weisner, S. E. B. (1996). Decoupling of cascading trophic interactions in a freshwater benthic food chain. Oecologia, 108, 534–541.
   PubMed Web of Science ®Google Scholar
• Cetron, M. S., Chitsulo, L., Sullivan, J. J., Filcher, J., Noh, J., Tsang, V. C., Hightower, A. W. & Addis, D. G. (1996). Schistosomiasis in Lake Malawi. Lancet, 348, 1247–1278.
   Google Scholar
• Chiota, S. S., McKaye, K. R. & Stauffer, J. R (1991). Prey handling in Trematocranus placodon, a snail-eating cichlid fish from Malawi. Ichthyological Exploration of Freshwater, 2,203–208.
   Google Scholar
• Eldblom, C. & Kristensen, T. K. (2003). A revision of the genus Melanoicles (Gastropoda: Thiaridae) in Lake Malawi. African Zoology, 38, 357–369.
   Web of Science ®Google Scholar
• Elliott, J. M. (1975). Some Methods for the Statistical Analysis of Samples of Benthic Invertebrates. Scientific Publications No. 25. Ambleside, U.K.: Freshwater Biological Association.
   Google Scholar
• Evers, B. N. (2004). Studies on Trematocranus placo-don as a predator of schistosome intermediate host snails in Lake Malawi. M.Sc thesis, University of Copenhagen, Copenhagen, Denmark.
   Google Scholar
• Fryer, J. & Iles, T. D. (1972). The Cichlid Fishes of the Great Lakes of Africa. London: Oliver & Boyd.
   Google Scholar
• Genner, M. J. & Michel, E. (2003). Fine-scale habitat associations of soft-sediment gastropods at Cape Maclear, Lake Malawi. Journal of Molluscan Studies, 69,325–328.
   Web of Science ®Google Scholar
• Genner, M. J., Michel, E., Erpenbeck, D., de Voogd, N., Witte, F. & Pointier, J.-P. (2004). Camouflaged invasion of Lake Malawi by an Oriental gastropod. Molecular Ecology, 13, 2135–2141.
   PubMed Web of Science ®Google Scholar
• Hoogerhoud, R. J. C. (1986). Taxonomic and ecolo-gical aspects of morphological plasticity in mollusci-vorous haplochromines (Pisces, Cichlidae). Annalen Zoologische Wetenschappen, 251, 131–134.
   Google Scholar
• Konings, A. (2001). Malawi Cichlich in their Natural Habitat, 3rd Edn. El Paso, TX: Cichlid Press.
   Google Scholar
• Louda, S. M., Gray, W. N., McKaye, K. R. & Mhone, O. J. (1983). Distribution of gastropod genera over a vertical depth gradient at Cape Maclear, Lake Malawi. The Veliger, 25, 387-392.
   Google Scholar
• Madsen, H., Bloch, P., Phiri, H., Kristensen, T. K. & Furu, P. (2001). Bulinus nyassanus is an intermediate host for Schistosoma haematobium in Lake Malawi. Annals of Tropical Medicine and Parasitology, 95, 353–360.
   Google Scholar
• Madsen, H., Stauffer, J. R, Bloch, P., Konings, A., McKaye, K. R & Lilongwe, J. S.(2004). Schistosomiasis haematobium transmission in Lake Malawi. African Journal of Aquatic Science, 29, 117–119.
   Google Scholar
• Mandahl-Barth, G. (1972). The freshwater mollusca of Lake Malawi. Revue de Zoologie et de Botanique Africaines, 86, 257–289.
   Google Scholar
• McKaye, K. R., Stauffer, J. R. & Louda, M. (1986). Fish predation as a factor in the distribution of Lake Malawi gastropods. Experimental Biology, 45, 279–289.
   PubMedGoogle Scholar
• Mittelbach, G. (1984). Predation and resource parti-tioning in two sunfishes (Centrarchidae). Ecology, 65, 499–513.
   Web of Science ®Google Scholar
• Msukwa, A. V. & Ribbink, A. J. (1997). The potential role of sanctuary areas for biological control of schistosomiasis in Lake Malawi national park. In Proceedings of a Workshop on Medical Malacology in Africa, Harare, Zimbabwe, September 22-26, eds
   Google Scholar
• Madsen, H., Appleton, C. C. & Chimbari, M. pp. 305-317. Charlottenlund, Denmark: Danish Bilharziasis Laboratory.
   Google Scholar
• Osenberg, C. W. & Mittelbach, G. G. (1989). Effects of body size on the predator-prey interaction between pumpkinseed sunfish and gastropods. Ecological Monographs, 59, 405–432.
   Web of Science ®Google Scholar
• Phiri, H., Bloch, P., Madsen, H. & Dudley, C. (1999). Distribution and population dynamics of Bulinus globosus and B. nyassanus on Nankumba Peninsula, Mangochi district, Malawi. Prelimnary findings. In Proceedings of a Workshop on Medical and Veterinary Malacology in Africa, Harare, Zimbabwe, November 8-12, eds. Madsen, H., Appleton, C. C. & Chimbari, M. pp. 273-286. Charlottenlund, Denmark: Danish Bilharziasis Laboratory.
   Google Scholar
• Slootweg, R. (1987). Prey selection by molluscivorous cichlids foraging on schistosomiasis vector snail, Biomphalaria glabrata. Oecologia, 74,193–202.
   PubMed Web of Science ®Google Scholar
• Sørensen, L. V. G., Jorgensen, A. & Kristensen, T. K. (2005). Molecular diversity and phylogenetic rela-tionships of the gastropod genus Melanoides in Lake Malawi. African Zoology, 40, 179–191.
   Web of Science ®Google Scholar
• Stauffer, J. R., Arnegard, M. E., Cetron, M., Sullivan, J. J., Chitsulo, L. A., Turner, G. F., Chiota, S. & McKaye, K. R (1997). Controlling vectors and hosts of parasitic diseases using fishes. BioScience, 47,41–49.
   Web of Science ®Google Scholar
• Stephens, D. W. & Krebs, J. R. (1984). Foraging Theory. Princeton, NJ: Princeton University Press.
   Google Scholar
• Strauss, R. E. (1979). Reliability estimates for Ivlev's electivity index, the forage ratio, and a proposed linear index of food selection. Transactions of the American Fisheries Society, 108, 344–354.
   Web of Science ®Google Scholar
• World Health Organization (2002). Prevention and Control of Schistosomiasis and Soil-transmitted Helminthiasis: Report of a WHO Expert Committee. Technical Report Series No. 912. Geneva: WHO.
   Google Scholar
• Wright, C. A., Klein, J. & Eccles, D. H. (1967). Endemic species of Bulinus in Lake Malawi. Journal of Zoology, 151, 199–209.
   Web of Science ®Google Scholar
• Zar, J. H. (1984). Biostatistical Analysis, 2nd Edn. Englewood Cliffs, NJ: Prentice-Hall.
   Google Scholar