, Volume 1, Issue 2, pp 101–115 | Cite as

Effects of DDT treatments applied for tsetse fly control on White-headed Black Chat (Thamnolaea arnoti) populations in Zimbabwe. Part II: cause of decline

  • R. J. Douthwaite
  • C. C. D. Tingle


Food supply, breeding success and DDT residue accumulation were investigated as possible causes for the decline of White-headed Black Chat populations in woodland sprayed for tsetse fly control. Gut contents from 21 birds were examined. A variety of invertebrates had been eaten, but ants, especiallyCamponotus spp. (Formicidae: Formicinae),Pheidole spp. (Myrmicinae), and termites, especiallyOdontotermes spp. (Isoptera: Termitidae), predominated in the dry season. In the early rains, more beetles (Coleoptera (predominantly Curculionidae)) and fewer termites were eaten. Ant and termite activity at sprayed sites in the study area was as great as or greater than that at unsprayed sites. Ants (Camponotus spp.) from sprayed sites held mean residue levels of 8.71 µg g−1 dry weight (max. 218 µg g−1 dry weight) total DDT, of which 67% was unaltered DDT. Termites and beetles had mean residue levels of 3.32 µg g−1 dry weight (max. 14 µg g−1 dry weight) and 0.92 µg g−1 dry weight (max. 8 µg g−1 dry weight) total DDT, of which 44% and 37% was unaltered DDT, respectively. Fledging success of White-headed Black Chats in adjacent sprayed and unsprayed areas was similar. Residues of DDT, DDD and DDE were found in all 23 chat carcasses examined. Birds collected in the dry season (July) from an area sprayed one month before contained up to 2206 µg DDT, 367 µg DDD and 578 µg DDE, g−1 extractable lipid (86, 17 and 27 µg g−1 dry weight, respectively). On average, residue levels were 50 times higher than in birds from the unsprayed area, and 4 times higher than in birds taken from another, recently sprayed area in the early rains (November). It is concluded that DDT spraying did not reduce availability of prey or fledging success. Initial population decline in sprayed areas was due to a lethal accumulation of DDT residues from prey, especiallyCamponotus spp. ants. Possible reasons for continued decline for 2–3 years after spraying, are discussed.


DDT Thamnolaea arnoti population decline prey contamination residue burdens 


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  1. ADAS (1990)Determination of Organochlorine Pesticide Residues in Avian Tissue Samples. Contract Report No. C/89/0059. Tolworth, UK: Agricultural Development and Advisory Service, Ministry of Agriculture Fisheries and Food.Google Scholar
  2. Bailey, S., Bunyan, P.J., Rennison, B.D. and Taylor, A. (1969a) The metabolism of 1,1-di(p-chlorophenyl)-2,2,2-trichloroethane and 1,1-di(p-chlorophenyl)-2,2-dichloroethane in the pigeon.Toxicol. Appl. Pharmacol. 14, 13–22.CrossRefPubMedGoogle Scholar
  3. Bailey, S., Bunyan, P.J., Rennison, B.D. and Taylor, A. (1969b) The metabolism of 1,1-di(p-chlorophenyl)-2,2,2-dichloroethylene and 1,1-di(p-chlorophenyl)-2-chloroethylene in the pigeon.Toxicol. Appl. Pharmacol. 14, 23–32.CrossRefPubMedGoogle Scholar
  4. Bailey, S., Bunyan, P.J., Jennings, D.M. and Taylor, A. (1970) Hazards to wildlife from the use of DDT in orchards.Pesticide Sci. 1, 66–9.Google Scholar
  5. Bailey, S., Bunyan, P.J., Jennings, D.M., Norris, J.D., Stanley, P.I. and Williams, J.H. (1974) Hazards to wildlife from the use of DDT in orchards: II. A further study.Agro-Ecosystems 1, 323–38.CrossRefGoogle Scholar
  6. Barker, P.S. and Morrison, F.O. (1964) Breakdown of DDT to DDD in mouse tissue.Can. J. Zool. 42, 324–5.Google Scholar
  7. Barker, R.J. (1958) Notes on some ecological effects of DDT sprayed on elms.J. Wildlife Manage. 22, 269–74.Google Scholar
  8. Clark, D.R. (1981). Death in bats from DDE, DDT, or dieldrin: diagnosis via residues in carcass fat.Bull. Environ. Contamin. Toxicol. 26, 367.Google Scholar
  9. Coaton, W.G.H. (1950)Termites and their Control in Cultivated Areas in South Africa. Bulletin No. 305, 1–27, Pretoria, Union of South Africa: Department of Agriculture.Google Scholar
  10. Das, G.M. (1958) Observations on the termites affecting tea in north-east India and their control.Indian J. Agric. Sci. 28(4), 553–60.Google Scholar
  11. Douthwaite, R.J. (1992a) Effects of DDT treatments applied for tsetse fly control on White-headed Black Chat (Thamnolaea arnoti) populations in Zimbabwe. Part I: population changes.Ecotoxicol. 1, 17–30.CrossRefGoogle Scholar
  12. Earle, R.A. and Louw, S.v.d.M. (1988). Diet of the ant-eating chatMyrmecocichla formicovora in relation to terrestrial arthropod abundance.South African J. Zool. 23(3), 224–9.Google Scholar
  13. French, M.C. and Jefferies, D.J. (1971) The preservation of biological tissue for organochlorine insecticide analysis.Bull. Environ. Contamin. Toxicol. 6, 460–3.Google Scholar
  14. Harris, W.V. (1948) Report on a trial with DDT and BHC for the protection of timber against termites.East African Agric. J. 14(1), 49–50.Google Scholar
  15. Holloway, M.T.P. (1990) Alternatives to DDT for use in ground spraying operations against tsetse flies (Diptera: Glossinidae).Trans. Zimbabwe Sci. Assoc. 64(4), 33–40.Google Scholar
  16. Jefferies, D.J. and Walker, C.H. (1966) Uptake ofpp′-DDT and its post-mortem breakdown in avian liver.Nature 212, 533–4.Google Scholar
  17. Mackworth-Praed, C.W. and Grant, C.H.B. (1963).Birds of the Southern Third of Africa, African Handbook of Birds, Series 2, Vol. 2. London: Longmans.Google Scholar
  18. Matthiessen, P. (1985) Contamination of wildlife with DDT insecticide residue in relation to tsetse fly control operations in Zimbabwe.Environ. Pollut. B10, 189–211.Google Scholar
  19. McLachlan, G.R. and Liversidge, R. (1978)Roberts Birds of South Africa. Cape Town: John Voelcker Bird Book Fund.Google Scholar
  20. Mehner, J.F. and Wallace, G.J. (1959) Robin populations and insecticides.Atlantic Naturalist 14, 4–9.Google Scholar
  21. Mitchell, B.L. (1980) Report on a survey of the termites of Zimbabwe.Occasional Papers of the National Museum and Monuments, Rhodesia, B,Natural Science 6, 187–323.Google Scholar
  22. NRI (1990)DDT and Deltamethrin in Avian Tissue. Pesticide Residues Analysis Report No. 89BY. Chatham, UK: Natural Resources Institute.Google Scholar
  23. Okwakol, M.J.N. (1988) The present knowledge on soil fauna in East Africa.J. African Zool. 102, 323–31.Google Scholar
  24. Risebrough, R.W. (1986) Pesticides and bird populations.Current Ornithol. 3, 397–427.Google Scholar
  25. Robinson, J. (1967) Residues of organochlorine insecticides in dead birds in the United Kingdom.Chem. Ind. 1974–86.Google Scholar
  26. Rudd, R.L., Craig, R.B. and Williams, W.S. (1981) Trophic accumulation of DDT in a terrestrial food web.Environ. Pollut. A25, 219–28.Google Scholar
  27. Stickel, W.H., Stickel, L.F. and Christensen, R. (1966) Residues of DDT in brains and bodies of birds that died on dosage and in survivors.Science 151, 1549–51.PubMedGoogle Scholar
  28. Stickel, W.H., Stickel, L.F. and Coon, F.B. (1970) DDE and DDD residues correlated with mortality of experimental birds.Pesticides Symposia, pp. 287–94. Miami: Halos Assoc.Google Scholar
  29. Stickel, W.H., Stickel, L.F., Dyrland, R.A. and Hughes, D.L. (1984) DDE in birds: lethal residues and loss rates.Arch. Environ. Contamin. Toxicol. 13, 1–6.Google Scholar
  30. Telling, G.M., Sissons, D.J. and Brinkman, H.W. (1977) Determination of organochlorine insecticide residues in fatty foodstuffs using a clean-up technique based on single column of activated alumina.J. Chromatogr. 137, 405–23.CrossRefPubMedGoogle Scholar
  31. Thomé, J.P. Debouge, M.H. and Louvet, M. (1987) Carnivorous insects as bioindicators of environmental contamination: organochlorine insecticide residues related to insect distribution in terrestrial ecosystems.Int. J. Environ. Anal. Chem. 30, 219–32.Google Scholar
  32. Tingle, C.C.D. (1993) Bait location by ground-foraging ants (Hymenoptera: Formicidae) in mopane woodland selectively sprayed to control tsetse fly (Diptera: Glossinidae) in Zimbabwe.Bull. Entomol. Res. 83 (in press).Google Scholar
  33. Tingle, C.C.D., Lauer, S. and Armstrong, G. (1992) Dry season, epigeal invertebrate fauna of mopane woodland in north western Zimbabwe.J. Arid Environ. 27, (in press).Google Scholar
  34. Usher, M.B. (1988) Soil invertebrates: a review of species, populations, communities, modelling and conservation with special reference to the African continent.J. African Zool. 102, 285–300.Google Scholar
  35. Wallace, G.J., Nickell, W.P. and Bernard, R.F. (1961)Bird Mortality in the Dutch Elm Disease Program in Michigan. Bulletin 41, Bloomfield Hills: Cranbrook Institute of Science.Google Scholar

Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • R. J. Douthwaite
    • 1
  • C. C. D. Tingle
    • 2
  1. 1.Tsetse and Trypanosomiasis Control BranchCausewayZimbabwe
  2. 2.Natural Resources InstituteChathamUK

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