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Environmental Biology of Fishes

, Volume 97, Issue 7, pp 787–796 | Cite as

Bushmeat, over-fishing and covariates explaining fish abundance declines in the Central Congo Basin

  • Bila-Isia InogwabiniEmail author
Article

Abstract

Fish stocks are declining at alarming rates in the Central African forests but little is known about patterns of fishing pressure for different areas. To contribute to the understanding of covariates that could explain these trends, this study documented the relative abundances of fish in eleven sites in the western Democratic Republic of Congo in relation to human density, distance from the nearest markets and mean numbers of fishing nets. Linear regression indicated that, taken alone, 88 % of observed differences in fish relative abundance correlated with the mean number of fishing nets and 60 % of these differences were attributable to distance from the nearest market. Human density was marginally associated with fish abundance. The study also shows that fish and wildlife relative abundances followed the same trends: where more wildlife species remain, there are more abundant fish stocks. The two conservation messages of this paper are that, as is the case for bushmeat, fishing becomes a problem when the commercial market is its prime driver and a solution to the bushmeat crisis could also reduce over-fishing.

Keywords

Bushmeat Fish abundance Large mammal Encounter rates Human density Market Mean number of nets 

Notes

Acknowledgments

Data from the Salonga National Park were collected while I was working for the Zoological Society of Milwaukee and the Wildlife Conservation Society. Data from Lake Tumba were from my work with the WWF DRC Program. Two people reviewed the language and improved the shape and the message of this paper but wished to remain anonymous. Five anonymous peers reviewed the content of this paper and help greatly improve its quality. The writing up of this paper has been made possible through the postdoctoral grant in Aquatic Assessment - Identifying human influence in waters of the Lake Tumba landscape of the Swedish University of Agricultural Sciences, department of Aquatic Sciences and Assessment, Uppsala. Kevin H. Bishop commented earlier drafts of this manuscript. The research in the Salonga National Park was approved by the Congolese Institute for Conservation of Nature and the research in the Lake Tumba Landscape was approved by the Ministry of Environment and Nature conservation.

References

  1. Apaza L, Wilkie D, Byron E, Huanca T, Leonard W, Pérez E, Vadez RG V, Godoy (2002). Meat prices influence the consumption of wildlife by the Tsimane’ Amerindians of Bolivia. Oryx 36: doi:  10.1017/S0030605302000000
  2. Aubray R (1976) The fishery of Cameroon: An economic review. Type-scripted report submitted to The Food Aid Organization. Rome, ItalyGoogle Scholar
  3. Aveling C, Botaka B, Hall JS, Hart JA, Hart TB, Inogwabini BI, Plumptre A, Wilkie D (2003) Democratic Republic of Congo Environmental Analysis - Final Report. Type-scripted report submitted to the United States Agency of International Development, Washington DC, United States of AmericaGoogle Scholar
  4. Bailey RG (1986) The Zaïre River system. In: Davies BR, Walker KF (eds) The ecology of river systems. Junk Publishers, Dordrecht, pp 201–214CrossRefGoogle Scholar
  5. Banister KE (1986) Fish of the Zaire system. In: Davies BR, Walker KF (eds) The ecology of river systems. Junk Publishers, Dordrecht, pp 215–224Google Scholar
  6. Barnes RFW (2002) Bushmeat boom and bust in West and Central Africa. Oryx 36:236–242CrossRefGoogle Scholar
  7. Barnes RFW, Barnes K, Alers M, Blom A (1991) Man determines the distribution of elephants in the rain forests of northeastern Gabon. Afr J Ecol 29:54–63CrossRefGoogle Scholar
  8. BPOST (British Parliament Office of Science and Technology) (2005) The bushmeat trade. Postnote available from www.parliament.uk/post/home.htm
  9. Brashares JS, Arcese P, Sam MK, Coppolillo PB, Sinclair ARE, Balmford A (2004) Bushmeat hunting, wildlife declines, and fish supply in West Africa. Science 306:1180–1183PubMedCrossRefGoogle Scholar
  10. Bennett EL (2002) Is there a link between wild meat and food security? Conserv Biol 16:590–592CrossRefGoogle Scholar
  11. Bennett EL, Robinson JG (2000) Hunting of Wildlife in Tropical Forests Implications for Biodiversity and Forest Peoples. The World Bank Environment Department. Biodiversity Series — Impact Studies. Paper No 76Google Scholar
  12. Bowen-Jones E, Pendry S (1999) The threat to primates and other mammals from bushmeat trade in Africa, and how this could be diminished. Oryx 33:233–246Google Scholar
  13. CEFDHAC (Conference on the Central African Moist Forest Ecosystems) (2001) Regional Strategic Action Plan and Biodiversity Resources on the Congo Basin Ecosystems. United Nations Development Program, International Union for the Conservation of Nature, the Global Environment Facility, Yaounde, CameroonGoogle Scholar
  14. Chamberlain JL, Cunningham AB, Nasi R (2004) Diversity in forest management: non-timber forest products and bush meat. Renew Resour J 22:11–19Google Scholar
  15. Chapman LJ (2001) Fishes of African rain forests – diverse adaptations to environmental challenge. In: Weber W, White LJT, Vedder A, Naughton-Treves L (eds) African rain forest – ecology and conservation: An interdisciplinary perspective. Yale University Press, New Haven, pp 263–290Google Scholar
  16. Colom A, Bakanza A, Mundeka J, Hamza T, Ntumbandzondo B (2006) The socio-economic dimensions of the management of biological resources, in the Lac Télé – Lac Tumba Landscape, DRC Segment: A segment-wide baseline Socio-Economic study’s Report. Submitted to the World Wide Fund for Nature DRC, Kinshasa Office, Democratic Republic of CongoGoogle Scholar
  17. Cowlishaw G, Mendelson S, Rowcliffe MJ (2005) Structure and operation of a bushmeat commodity chain in southwestern Ghana. Conserv Biol 19:139–149Google Scholar
  18. De Merode E, Homewood K, Cowlishaw G (2004) The value of bushmeat and other wild foods to rural households living in extreme poverty in Democratic Republic of Congo. Biol Conserv 18:573–581CrossRefGoogle Scholar
  19. De Merode E, Hillman-Smith K, Nicholas A, Ndey A, Likango M (2000) The spatial correlates of wildlife distribution around Garamba National Park, Democratic Republic of Congo. Int J Remote Sens 21:2665–2683CrossRefGoogle Scholar
  20. Evrard C (1968) Recherches écologiques sur le peuplement forestier des sols hydromorphes de la Cuvette Centrale congolaise. Serie scientifique No110/Office National de la recherche Scientifique et du Développement – Ministère Belge de l’Education Nationale et de la CultureGoogle Scholar
  21. Fa JE, Currie D, Meeuwing J (2003) Bushmeat and food security in the Congo Basin: linkages between wildlife and people’s future. Environ Conserv 30:71–78CrossRefGoogle Scholar
  22. FAO (2008) Database on introduction of aquatic species. Avalaible at http://www.fao.org/fishery/dias/1. 14 Dec 2012
  23. Foley JA, DeFries R, Asner GP, Barford C, Bonan G, Carpenter SR, Chapin FS, Coe MT, Daily GC, Gibbs HK, Helkowski JH, Holloway T, Howard EA, Kucharik JC, Monfreda C, Patz JA, Prentice IC, Ramankutty N, Snyder PK (2005) Global consequences of land use. Science 309:570–574PubMedCrossRefGoogle Scholar
  24. Gautier-Hion A, Colyn M, Gautier JP (1999) Histoire naturelle des primates d’Afrique Centrale. Ecosystèmes Forestiers d’Afrique Centrale (ECOFAC), Union Douanière d’Etats d’Afrique Centrale (UDEAC). Edition Multipress, LibrevilleGoogle Scholar
  25. Ghimire KB, Pimbert PM (2000) Social changes and conservation: an overview of issues and concepts. In: Ghimire KB, Pimbert PM (eds) Social changes and conservation. Earth Scan, London, United Kingdom, pp 1–45Google Scholar
  26. Griffiths JF (1972) Climates of Africa. Elsevier Publishing CompanyGoogle Scholar
  27. Hall JS, Inogwabini BI, Williamson EA, Omari I, Sikubwabo C, White LJT (1997) A survey of Elephants (Loxodonta africana) in the Kahuzi-Biega National Park lowland sector and adjacent forest in eastern Zaire. Afr J Ecol 35:213–223CrossRefGoogle Scholar
  28. Hoyt RA, Frayne JM (2003) Primate exploitation and bushmeat marketing in Liberia, West Africa. Am J Phys Anthropol Suppl 36:118Google Scholar
  29. Infield M (1988) Hunting, trapping and fishing in villages within and on the periphery of the Korup National Park. Type-scripted Report to World Wide Fund for Nature, Washington, United States of AmericaGoogle Scholar
  30. Inogwabini BI (2013) The Lake Télé - Lake Tumba Landscape. In: Howarth RW (ed) Biomes and Ecosystems: An Encyclopaedia. Salem Press & Golson Media, pp: 749 – 751Google Scholar
  31. Inogwabini BI (2010) Conserving great apes living outside protected areas: the distribution of bonobos in the Lake Tumba landscape, Democratic Republic of Congo. PhD Thesis, Durrell Institute of Conservation and Ecology, University of Kent at Canterbury, United KingdomGoogle Scholar
  32. Inogwabini BI (2006) A preliminary checklist of Mammals and Plants: conservation status of some species in the Salonga National Park, Democratic Republic of Congo. Endanger Species Updat 23:104–117Google Scholar
  33. Inogwabini BI (2005) Fish of the Salonga National Park, Democratic Republic of Congo: survey and conservation issues. Oryx 39:78–81CrossRefGoogle Scholar
  34. Inogwabini BI, Leader-Williams N (2013) Conservation paradigms seen through the lenses of bonobos. In: Sodhi NS, Raven P (eds) Conservation biology: Lessons from the tropics. Oxford University Press, Oxford, pp 7–18Google Scholar
  35. Inogwabini BI, Lingopa Z (2013) Fish species occurrence, estimates and human activities on the islands of the Congo River, Central Africa. Environ Biol Fish. doi: 10.1007/s10641-0136-4 Google Scholar
  36. Inogwabini BI, Matungila B, Mbende L, Abokome M, Tshimanga WT (2007) Great apes in the Lake Tumba landscape, Democratic Republic of Congo: newly described populations. Oryx 41:532–538CrossRefGoogle Scholar
  37. Inogwabini BI, Sandokan MB, Ndunda M (2006) A dramatic decline in rainfall regime in the Congo Basin: evidence from a thirty-four year data set from the Mabali Scientific Research Centre, Democratic Republic of Congo. Int J Meteorol 31:278–285Google Scholar
  38. Inogwabini BI, Hall JS, Vedder A, Curran B, Yamagiwa J, Basabose K (2000) Conservation Status of large mammals in the mountain sector of Kahuzi-Biega National Park, Democratic Republic of Congo in 1996. Afr J Ecol 38:269–276CrossRefGoogle Scholar
  39. INS (Institut National des Statistiques) (1984) Recensement scientifique de la population 1984: Zaïre et régions 1984 – 2000. Ministère du Plan et Aménagement du Territoire, KinshasaGoogle Scholar
  40. IRD (Institut de Recherche pour le Développement) (2002) Congo River Basin: geology and soil types influence drought. http://www.ewaonline.de 7 July 2013
  41. Kashema JM (2006) How the DRC (ex-Zaïre) could become self-sufficient in fish production. Agric Int Mag 92:1–45Google Scholar
  42. Kortlandt A (1995) A survey of the geographical range, habitat and conservation of the pygmy chimpanzee (Pan paniscus): an ecological perspective. Primate Conserv 16:21–36Google Scholar
  43. Laporte N (2000) The Map of the Salonga National Park, using the Land Sat mosaic. University of Maryland, CARPE and the Zoological Society of MilwaukeeGoogle Scholar
  44. Matuka K (1975) La conservation de la nature au Zaïre: Aspects. Editions Lokole, KinshasaGoogle Scholar
  45. Meye JA, Ikomi RB (2012) seasonal fish abundance and fishing gear efficiency in River Orogodo, Niger Delta, Nigeria. World J Fish Marine Sci 4:191–200Google Scholar
  46. Misund OA, Kolding J, Fréon P (1999) Fish capture devices in industrial and artisanal fisheries and their influence on management. In: Hart PJB, Reynolds JD (eds) Handbook of fish biology and fisheries. Volume 2: Fisheries. Blackwell Publishing., pp: 13 – 36Google Scholar
  47. Morra W, Hearn G, Buck AJ (2009) The market for bushmeat: Colobus Satanas on Bioko Island. Ecol Econ. doi: 10.1016/j.ecolecon.2009.04.015 Google Scholar
  48. Nasi R, Brown D, Wilkie D, Bennett E, Tutin C, Van Tol G, Christophersen T (2008) Conservation and use of wildlife-based resources: the bushmeat crisis. Secretariat of the Convention on Biological Diversity, Montreal, and Center for International Forestry Research (CIFOR), Bogor. Technical Series No. 33Google Scholar
  49. Neiland A, Béné C (2002) Review of River Fisheries Valuation in West and Central Africa. In Food Aid Organization (FAO) (ed) Tropical river fisheries valuation: background papers to global synthesis. Rome, pp: 48 – 106Google Scholar
  50. Owusu RA, Birsel A, Cassells D, Courrau J, Hamilton L, Kalem S, Keng WL, Lacerda L, Lise Y, Pagiola S, Scherr S, Sericchio C (2003) Running pure: the importance of protected areas to drinking water – A research report for the World Bank/WWF Alliance for forest conservation and sustainable use. WWF International, Gland, Switzerland & The World Bank, Washington DC, United States of AmericaGoogle Scholar
  51. PNUD (Programme des Nations Unies pour le Développement), UNOPS (United Nations Office for Project Services) (1988) Plan triennal (1998 – 2000) : Province de l’Equateur, République Démocratique du Congo. Ministères de l’Agriculture et de l’Elevage, du Plan, de l’Education Nationale et de l’Environnement Conservation de la Nature, Forêts et Pêche, Kinshasa, République Démocratique du CongoGoogle Scholar
  52. Redmond I, Aldred T, Jedamzik K, Westwood M (2006) Recipes for survival: controlling the bushmeat trade. The World Society for the Protection of Animals, London, United KingdomGoogle Scholar
  53. Reinartz GE, Guislain P, Bolinga TDM, Isomana E, Inogwabini BI, Bokomo N, Ngamankosi M, Wema-Wema L (2007) Ecological factors influencing Bonobo density and distribution in the Salonga National Park: Applications for population assessment. In: Takeshi F, Thompson J (eds) The Bonobos behavior, ecology, and conservation. Springer, New York, pp 167–188Google Scholar
  54. Reinartz G, Inogwabini BI, Ngamankosi M, Wema-Wema (2006) Effects of forest type and human presence on bonobo (Pan paniscus) density in the Salonga National Park. Int J Primatol 27:603–634CrossRefGoogle Scholar
  55. Rowcliffe JM, Cowlishaw G, Long J (2003) A model of human hunting impacts in multi-prey communities. J Appl Ecol 40:872–889CrossRefGoogle Scholar
  56. Saunders DL, Meeuwing JJ, Vincent ACJ (2002) Fresh water protected areas: strategies for conservation. Conserv Biol 16:30–41CrossRefGoogle Scholar
  57. Sparre P (1990) Can we use traditional length-based fish stock assessment when growth is seasonal? Fishbyte 1990:29–32Google Scholar
  58. Thieme ML, Abell R, Stiassny MLJ, Skelton P, Lehner B, Teugels GG, Dinerstein E, Toham AK, Burgess N, Olson D (2005) Freshwater ecoregions of Africa and Madagascar: A conservation assessment. Island Press, Washington DC (United States of America), Covelo (Spain) and London (United Kingdom)Google Scholar
  59. Thompson AB, Allison EH, Ngatunga BP (1995) Spatial and temporal distribution of fish in the pelagic waters. In: Menz A (ed) The fishery potential and productivity of the pelagic zone of Lake Malawi/Niassa. Natural Resources Institute, Chatham, pp 201–232Google Scholar
  60. Twagirashyaka F, Inogwabini BI (2009) Lake TéLé-Lake Tumba landscape. In: De Wasseige C, Devers D, De Marcken P, Eba’a Atyi R, Nasi R, Mayaux P (eds) The forests of the Congo Basin - State of the Forest 2008. Publications Office of the European Union, Luxembourg, pp 305–316Google Scholar
  61. UNEP (United Nations Environmental Program) (2004) World Heritage Sites – Salonga National Park, Democratic Republic of Congo. www.unep-wcmc/sites/salonga.html 14 December 2012
  62. USAID (The United States of America Agency for International Development) (2010) Democratic Republic of Congo: biodiversity and tropical forestry assessment (118/119) – Final Report. USAID, Washington DC, United States of AmericaGoogle Scholar
  63. Van Krunkelsven E, Inogwabini BI, Draulans D (2000) A survey of bonobos and other large mammals in the Salonga National Park, Democratic Republic of Congo. Oryx 34:180–187CrossRefGoogle Scholar
  64. Venter O, Brodeur NN, Nemiroff L, Belland B, Dolinsek IJ, Grant JWA (2006) Threats to endangered species in Canada. Bioscience 56:1–8CrossRefGoogle Scholar
  65. Walsh PD, White LJT (1999) What will it take to monitor forest elephant populations? Conserv Biol 13:1194–1202CrossRefGoogle Scholar
  66. WB (The World Bank) (2009) Democratic Republic of Congo: strategic framework for the preparation of a pygmy development program. Fragile States, Conflict & Social Development Unit. Sustainable Development Department. Africa Region. Washington, DC, United States of America. Report No. 51108–ZRGoogle Scholar
  67. WC (The World Fish Center) (2008) Tropical river fisheries valuation: Establishing economic value to guide policy. Issues Brief 1890Google Scholar
  68. White F (1983) The vegetation of Africa: a descriptive memoire to accompany the UNESCO/AETFA vegetation map of Africa. United Nations Educational, Scientific and Cultural Organization (UNESCO)/Association pour l’Etude Taxonomique de la Flore d’Afrique Tropicale (AETFA). Paris, FranceGoogle Scholar
  69. White LJT, Edwards A (2000) Conservation research in the African Rain forest: A technical handbook. Wildlife Conservation Society. Edition Multipress, LibrevilleGoogle Scholar
  70. Whitfield J (2003) Bushmeat: the law of the jungle. Nature 421:8–9PubMedCrossRefGoogle Scholar
  71. Wilkie DS, Starkey M, Abernethey K, Effa EN, Telfer P, Godoy R (2005) Role of prices and wealth in consumer demand for bushmeat in Gabon, central Africa. Conserv Biol 19:268–274CrossRefGoogle Scholar
  72. Wilkie DS, Shaw E, Rotberg F, Morelli G, Auzel P (2000) Roads, development, and conservation in the Congo Basin. Conserv Biol 14:1614–1622CrossRefGoogle Scholar
  73. Winemiller KO, Jepsen DB (1998) Effects of seasonality and fish movement on tropical river food webs. J Fish Biol 53:267–296CrossRefGoogle Scholar
  74. Wright JH, Priston NEC (2010) Hunting and trapping in Lebialem Division, Cameroon: bushmeat harvesting practices and human reliance. Endanger Species Res 11:1–12CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Swedish University of Agricultural SciencesUppsalaSweden

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