Abstract
We monitored the impact of habituation for tourism through changes in gorillas' behavior during the habituation process at Bai Hokou (Dzanga-Ndoki National Park, Central African Republic) from August 1996 to December 1999. From August 1998 onwards we focused on one gorilla group: the Munye. During the habituation process, it became increasingly easier to locate and to remain with the gorillas. Their initial reactions of aggression, fear and vocalization upon contact were replaced increasingly by ignoring us. Curiosity appeared to be an intermediate stage in the process. The way in which contacts with the Munye ended became more subdued over time. Regular daily contact is important in promoting habituation. Likewise, contacting gorillas while they are in a tree or in dense forest provides positive results compared to open habitat. Contacts within 10 m and contacts without forewarning the gorillas of observer presence, e.g., via tongue clacking, should be avoided. As of December 1999, habituation had progressed well; habituation of western gorillas is feasible. However, the gorillas experience negative effects during the habituation process, showing, for example, an increase in daily path length, and reactions of aggression, fear and vocalization upon contact. Impacts diminish over time. Given these and other potentially negative effects, the decision to begin habituation should not be taken lightly.
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Almasši, A., Blom, A., Otto, K., Knapou, J.-B., and Prins, H. H. T. (in prep.). Survey of elephants (Loxodonta Africana) in the Dzanga-Sangha Reserve, Central African Republic.
Aveling, C. (1996). Update on gorilla news from the ECOFAC programme. Gorilla Conserv. News 10: 7-9.
Aveling, C., and Aveling, R. (1989). Gorilla conservation in Zaire. Oryx 23(2): 64-70.
Bermejo, M. (1997). Study of western lowland gorillas in the Lossi forest of North Congo and a pilot gorilla tourism plan. Gorilla Conserv. News 11: 6-7.
Bermejo, M. (1999). Update on the Lossi gorillas study and future sancuary of gorillas, 1998, Popular Republic of Congo. Gorilla Conserv. News 13: 2p.
Blom, A. (2001). Ecological and Economic Impacts of Gorilla-Based Tourism in Dzanga-Sangha, Central African Republic, Doctoral Thesis, Wagenigen University, Wagenigen, Netherlands.
Blom, A., Almasši, A., Heitkonig, I. M. A., Kpanou, J.-B., and Prins, H. H. T. (2001). A survey of the apes in the Dzanga-Ndoki National Park, Central African Republic. Afr. J. Ecol. 39: 98-105.
Butynski, T., and Kalina, J. (1998a) Is Gorilla tourism sustainable? Gorilla J. 16: 15-19.
Butynski, T. M., and Kalina, J. (1998b). Gorilla tourism: A critical look. In Milner-Gulland, E. J., and Mace, R. (eds.). Conservation of Biological Resources, Blackwell Science, Oxford, pp. 294-370.
Cameron, K., Cooper, J., Drciru, M., Falcon, A., Kalema, G., Mudakikwa, A., Nizeyi, J.-B., Sherman, D., and Sleeman, J. (1997). Mountain Gorilla PHVA Workshop: Health and Disease Working Group Final Report, 13pp.
Carroll, R. W. (1986). Status of the lowland gorilla and other wildlife in the Dzanga-Sangha region of southwestern Central African Republic. Primate Conserv. 7: 38-41.
Carroll, R. W. (1988a). Relative density, range extension, and conservation potential of the lowland gorilla (Gorilla gorilla gorilla) in the Dzanga-Sangha region of southwestern Central African Republic. Mammalia 52: 309-323.
Carroll, R. W. (1988b). Elephants of the Dzanga-Sangha dense forest of southwestern C.A.R. Pachyderm 10: 12-15.
Carroll, R. W. (1997). Feeding Ecology of Lowland Gorillas (Gorilla gorilla gorilla) in Dzanga-Sangha Reserve of the Central African Republic, PhD Thesis, University of Yale.
Cipolletta, C. (submitted). Ranging patterns of a western lowland gorilla group (Gorilla gorilla gorilla) during habituation to humans in the Dzanga-Ndoki National Park, Central African Republic. Am. J. Primatol.
Doran, D., McNeilage, A., and Demmers, P. (1996). Mondika research center, Central African Republic. Gorilla Conserv. News 10: 9.
Fay, J. M. (1989). Partial completion of a census of the lowland gorilla (Gorilla g gorilla) in the Central African Republic. Mammalia 53: 203-215.
Fay, J. M. (1991a). An elephant (Loxodonta africana) survey using dung counts in the forests of the Central African Republic. J. Trop. Ecol. 7: 25-36.
Fay, J. M. (1991b). Forest elephant populations in the Central African Republic and Congo: The Central African Republic. Pachyderm 14: 4-12.
Fay, J. M. (1997). The Distribution, Habitat, Ecology, Evolution, and Origin of the Western Lowland Gorilla (Gorilla gorilla gorilla Savage and Wyman), PhD Thesis, Washington University.
Forthman, D. L., Burks, K. D., and Maple, T. L. (1996). Letter to the editor: African great ape ecotourism considered. Afr. Primates 2: 52-54.
Fossey, D. (1983) Gorillas in the Mist, Houghton Mifflin, Boston, MA.
Goldsmith, M. L. (1996). Ecological Influences on the Ranging and Grouping Behaviour of Werstern Lowland Gorillas at Bai Hokou, Central African Republic, PhD Thesis, State University of New York at Stony Brook, New York.
Goldsmith, M. L. (2000). Effects of ecotourism on the behavioral ecology of Bwindi gorillas, Ugnada: Preliminairy results. Am. J. Physical Anthropol. AAPA Abstr. Suppl. 30: 161.
Harcourt, A. H. (1986). Gorilla conservation: Anatomy of a campaign. In Ernischke, K. (ed.), Primates: The Road to Self-Sustaining Populations, Springer, New York.
Harcourt, A. H., Kineman, J., Campbell, G., Yamagiwa, J., Redmond, I., Aveling, C., and Condiotti, M. (1983). Conservation and the Virunga gorilla population. Afr. J. Ecol. 21(2): 139-142.
Homsy J. (1999). Consultancy on Ape Tourism and Human Disease, IGCP Regional Meeting, Rwanda.
Johns, B. (1999) Responses of chimpanzees to habituation and tourism in the Kibale forest, Uganda. Biol. Conserv. 78: 257-262.
Kalema, G. (1998). An Outbreak of Sarcoptic Mange in Free-Ranging Mountian Gorillas (Gorilla gorilla berengei) in Bwindi Impenetrable National Park, South Werstern Uganda, AAZV and AAWV Joint Conference, pp. 438.
Klaus, G. (1998). Natural Licks and Geophagy (Soil Ingestion) by Large Mammals in the Rainforest of the Central African Republic, Universitat Zurich, Zurich.
Klaus-Hugi, C. S. (1998). Home Range, Feeding Behaviour and Social Organization of the Bongo (Tragelaphus eurycerus) in the Rainforest of the Central African Republic, Universitat Zurich, Zurich.
Lilly, A. A., Mehlman, P. T., and Doran, D. (2002). Intestinal parasites in gorillas, chimpanzees, and humans at Mondika research site, Dzanga-Ndoki National Park, Central African Republic. Int. J. Primatol. 23(3): 555-573.
Macfie, L. (1996). Case report on scabies infection in Bwindi gorillas. Gorilla J., 19-20.
Magliocca, F. (1999). 1998 Update on the gorillas of the Odzala National Park, Popular Republic of Congo. Gorilla Conserv. News 13: 2p.
Magliocca, F., and Querouil, S. (1997). Preliminairy report on the use of the Maya-Maya north saline (Odzala National Park, Congo) by lowland gorillas. Gorilla Conserv. News 11: 5.
Magliocca, F., Querouil, S., and Gautier Hion, A. (1999). Population structure and group composition of Western Lowland Gorillas in North-Western Republic of Congo. Am. J. Primatol. 48: 1-14.
McNeilage, A. (1996). Ecotourism and mountain gorillas in the Virunga Volcanoes. In Taylor, V. and Dunstone, N. (eds.), The Exploitation of Mammal Populations, Chapman and Hill, London, pp. 334-344.
Mudakikwa, A. B. (1998). An Indicator of Human Impact: Gastrointestinal Parasites of Mountain Gorillas (Gorilla gorilla berengei) From the Virunga Volcanoes Region, Central Africa, AAZV and AAWV Joint Conference, pp. 436-437.
Noss, A. J. (1998). The impacts of cable snare hunting on wildlife populations in the forests of the Central African Republic. Conserv. Biol. 12: 390-398.
Olejniczak, C. (1996). Update on the Mbeli Bai gorilla study, Nouabale-Ndoki National Park, Congo. Gorilla Conserv. News 10: 6-7.
Olejniczak, C. (1997). 1996 update on the Mbeli Bai gorilla study, Nouabale-Ndoki National Park, Congo. Gorilla Conserv. News 11: 7-10.
Remis, J. M. (1994). Feeding Ecology and Positional Behavior of Western Lowland Gorillas (Gorilla gorilla gorilla) in the Central African Republic, PhD Thesis, Yale University, New Haven, CT.
Sholley, C. R. (1989). Mountain gorilla update. Oryx 57-58.
Sokal, R. R., and Rohlf, F. J. (1995). Biometry, 3rd edn., W. H. Freeman, New York.
SPSS (1997). SPSS Base 8.0, SPSS, Chicago.
Tutin, C. E. G. (1996). Ranging and social structure of lowland gorillas in the Lope Reserve, Gabon. In McGrew, W. C., Marchant, L. F., and Nishida, T. (eds.), Great Ape Societies, Cambridge University Press, 58-70.
Tutin, C. E. G., and Abernethy, K. A. (1997). Station d'Etude des Gorilles et Chimpanzes, Reserve de la Lope, Gabon. Gorilla Conserv. News 11: 2p.
Tutin, C. E. G., Abernethy, K. A., and Fontaine, F. (1996). Station d'Etude des Gorilles et Chimpanzes, Reserve de la Lope, Gabon—1995. Gorilla Conserv. News 10: 4-5.
Tutin, C. E. G., and Fernandez, M. (1991). Responses of wild chimpanzees and gorillas to the arrival of primatologists: Behaviour observed during habituation. In Box, H. O. (ed.), Primate responses to Environmental Change, Chapman & Hall, New York, pp. 187-196.
van Krunkelsven, E., Dupain, J., van Elsacker, L., and Verheyen, R. (1999). Habituation of bonobos (Pan paniscus): First reaction to the presence of observers and the evolution of response over time. Folia Primatol. 70: 365-368.
Wallis, J., and Lee, D. R. (in prep.). Primate Conservation: The Prevention of Disease Transmission, 27pp.
Wonnacott, T. H., and Wonnacott, R. J. (1977). Introductory Statistics, (3rd edn.), Wiley, New York.
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Blom, A., Cipolletta, C., Brunsting, A.M.H. et al. Behavioral Responses of Gorillas to Habituation in the Dzanga-Ndoki National Park, Central African Republic. International Journal of Primatology 25, 179–196 (2004). https://doi.org/10.1023/B:IJOP.0000014649.15973.3a
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DOI: https://doi.org/10.1023/B:IJOP.0000014649.15973.3a