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6 - Survey and census methods: population distribution and density

Published online by Cambridge University Press:  05 June 2012

By
Caroline Ross  and
Nigel Reeve
Edited by
Joanna M. Setchell  and
Deborah J. Curtis
Joanna M. Setchell
Affiliation:
University of Durham
Deborah J. Curtis
Affiliation:
Oxford Brookes University
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Summary

INTRODUCTION

A population study of a wild primate typically involves a considerable investment of time and resources (i.e. money, equipment, labour) and it is vital to ensure that such effort is well targeted. When designing your study, a key issue is whether your study objectives genuinely demand an absolute estimate of the population density from either a census (a total count) or a survey (in which density is estimated from statistically valid samples), or whether less information will suffice. Relative estimates of density using data from methods such as ‘catch per unit effort’ from trapping or systematic searching do not provide absolute densities but, as long as the sampling methods and other conditions are standardized, can allow reliable comparisons between locations and monitoring of population change over time. Population indices are based on indirect indicators that can be correlated with population density, such as the density of faeces or other characteristic signs. Such methods may be a more practical alternative to searching for secretive, hard-to-find animals.

In practice, no population survey or census is completely bias-free and many studies may find that a reliable relative population estimate or index is more achievable than a reliable absolute estimate of the population size (Bibby et al., 1992; Greenwood, 1996; Krebs, 1999). There is a trade-off between the depth of the data gathered and the number of replicate samples that can be obtained.

Type
Chapter
Information
Field and Laboratory Methods in Primatology
A Practical Guide
 , pp. 111 - 132
Publisher: Cambridge University Press
Print publication year: 2011

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References

Ancrenaz, M., Goossens, B., Gimenez, O., Azri Sawang, A. & Lackman-Ancrenaz, I. (2004). Determination of ape distribution and population size using ground and aerial surveys: a case study with orang-utans in lower Kinabatangan, Sabah, Malaysia. Anim. Conserv. 7, 375–85.CrossRefGoogle Scholar
Anderson, D. R., Burnham, K. P. & Crain, B. R. (1985). Estimating population size and density using line transect sampling. Biom. J. 7, 723–31.CrossRefGoogle Scholar
Begon, M. (1979). Investigating Animal Abundance, Capture–Recapture for Biologists. London: Edward Arnold.Google Scholar
Bibby, C. J., Burgess, N. D. & Hill, D. A. (1992). Bird Census Techniques. London: Academic Press.Google Scholar
Blom, A., Almasi, A., Heitkonig, I. M. A., Kpanou, J. B. & Prins, H. H. T. (2001). A survey of the apes in the Dzanga-Ndoki National Park, Central African Republic: a comparison between the census and survey methods of estimating the gorilla (Gorilla gorilla gorilla) and chimpanzee (Pan troglodytes) nest group density. Afr. J. Ecol. 39, 98–105.CrossRefGoogle Scholar
Bollinger, E. K., Gavin, T. A. & McIntyre, D. C. (1988). Comparison of transects and circular-plots for estimating bobolink densities. J. Wildlife Manag. 52, 777–86.CrossRefGoogle Scholar
Brockelman, W. Y. & Ali, R. (1987). Methods of surveying and sampling forest primate populations. In Primate Conservation in the Tropical Rain Forest, ed. Marsh, C. W. & Mittermeier, R. A., pp. 23–62. New York: Alan R. Liss.Google Scholar
Brugiere, D. & Fleury, M. C. (2000). Estimating primate densities using home range and line-transect methods: a comparative test with the black colobus monkey Colobus satanas. Primates 41, 373–82.CrossRefGoogle Scholar
Buckland, S. T., Anderson, D. R., Burnham, K. P.et al. (2001). Introduction to Distance Sampling: Estimating Abundance of Biological Populations. Oxford: Oxford University Press.Google Scholar
Charles-Dominique, P. (1977). Ecology and Behaviour of Nocturnal Primates. London: Duckworth.Google Scholar
Edwards, A. & White, L. (2000). Maps, compasses, GPS units and principles of navigation. In Conservation Research in African Rain Forests: A Technical Handbook, ed. White, L. & Edwards, A., pp. 31–51. New York: Wildlife Conservation Society.Google Scholar
Fashing, P. J. & Cords, M. (2000). Diurnal primate densities and biomass in the Kakamega Forest: an evaluation of census methods and a comparison with other forests. Am. J. Primatol. 50, 139–52.3.0.CO;2-N>CrossRefGoogle Scholar
Focardi, S., Marinis, A. M., Rizzotto, M. & Pucci, A. (2001). Comparative evaluation of thermal infrared imaging and spotlighting to survey wildlife. Wildl. Soc. Bull. 29, 133–9.Google Scholar
Fossey, D. & Harcourt, A. H. (1977). Feeding ecology of free–ranging mountain gorillas (Gorilla gorilla beringei). In Feeding Ecology, ed. Clutton-Brock, T. H., pp. 415–47. London: Academic Press.Google Scholar
Furuichi, T., Hashimoto, C. & Tashiro, Y. (2001). Extended application of a marked-nest census method to examine seasonal changes in habitat use by chimpanzees. Int. J. Primatol. 22, 913–28.CrossRefGoogle Scholar
Garner, D. L., Underwood, H. B. & Porter, W. F. (1995). Use of modern infrared thermography for wildlife population surveys. Environ. Manag. 19, 233–8.CrossRefGoogle Scholar
Gill, R. M. A., Thomas, M. L. & Stocker, D. (1997). The use of portable thermal imaging for estimating deer population density in forest habitats. J. Appl. Ecol. 34, 1273–86.CrossRefGoogle Scholar
Greenwood, J. J. D (1996). Basic techniques. In Ecological Census Techniques: A Handbook, ed. Sutherland, W. J., pp. 11–110. Cambridge: Cambridge University Press.Google Scholar
Guschanski, K., Vigilant, L., McNeilage, A.et al. (2009). Counting elusive animals: comparing field and genetic census of the entire mountain gorilla population of Bwindi Impenetrable National Park, Uganda. Biol. Conserv. 142, 290–300.CrossRefGoogle Scholar
Hashimoto, C. (1995). Population census of the chimpanzees in the Kalinzu Forest, Uganda: comparison between methods with nest counts. Primates 36, 477–88.CrossRefGoogle Scholar
Harcourt, A. H., Fossey, D. & Sabater Pi, J. (1981). Demography of Gorilla gorilla. J. Zool. Lond. 195, 215–33.CrossRefGoogle Scholar
Havens, K. J. & Sharp, E. J.. (1998). Using thermal imagery in the aerial survey of animals. Wildl. Soc. Bull. 26, 17–23.Google Scholar
Hubbs, A. H., Karels, T. & Boonstra, R. (2000). Indices of population size for burrowing mammals. J. Wildl. Manag. 64, 296–301.CrossRefGoogle Scholar
Kinzel, P. J., Nelson, J. M., Parker, R. S. & Davis, L. R. (2006). Spring census of mid-continent sandhill cranes using aerial infrared videography. J. Wildl. Manag. 70, 70–7.CrossRefGoogle Scholar
Krebs, C. J. (1999). Ecological Methodology. (2nd edn.) Menlo Park, CA: Addison Wesley Longman.Google Scholar
Marshall, A. J. & Meijaard, E. (2009). Orang-utan nest surveys: the devil is in the details. Oryx 46, 413–8.Google Scholar
Marshall, A. R., Lovett, J. C. & White, P. C. L. (2008). Selection of line-transect methods for estimating the density of group-living animals: lessons from the primates. Am J. Primatol. 70, 452–62.CrossRefGoogle ScholarPubMed
Mathewson, P. D., Spehar, S. N., Meijaard, E.et al. (2008). Evaluating orang-utan census techniques using nest decay rates: implications for population estimates. Ecol. Appl. 18, 208–21.CrossRefGoogle ScholarPubMed
McGraw, W. S. (1998). Three monkeys nearing extinction in the forest reserves of eastern Cote d'Ivoire. Oryx 32, 233–6.CrossRefGoogle Scholar
McNeilage, A., Plumtre, A. J., Brock-Doyle, A. & Vedder, A. (2001). Bwindi Impenetrable National Park, Uganda: gorilla census, 1977. Oryx 35, 39–47.CrossRefGoogle Scholar
Nichols, J. D. & Conroy, M. J. (1996). Techniques for estimating abundance and species richness. In Measuring and Monitoring Biological Diversity: Standard Methods for Mammals, ed. Wilson, D. E., Cole, F. R., Nichols, J. D., Rudran, R. &. Foster, M. S., pp. 177–234. Washington, D.C.: Smithsonian Institute Press.Google Scholar
Payne, J. (1987). Surveying orang-utan populations by counting nests from a helicopter: a pilot survey in Sabah. Prim. Conserv. 8, 92–103.Google Scholar
Parnell, R. J. (2000). Information from animal tracks and trails. In Conservation Research in African Rain Forests: A Technical Handbook, ed. White, L. & Edwards, A., pp. 157–89. New York: Wildlife Conservation Society.Google Scholar
Peres, C. A. (1999). General guidelines for standardizing line transect surveys of tropical forest primates. Neotrop. Primates 7, 11–6.Google Scholar
Plumptre, A. J. (2000). Monitoring mammal populations with line-transect techniques in African forests. J. Appl. Ecol. 37, 356–68.CrossRefGoogle Scholar
Singh, M., Lindburg, D. G., Udhayan, A., Kumar, M. A. & Kumara, H. N. (1999). Status survey of slender loris Loris tardigradus lydekkerianus in Dindigul, Tamil Nadu, India. Oryx 33, 31–7.CrossRefGoogle Scholar
Southwood, T. R. E. & Henderson, P. A. (2000). Ecological Methods. (3rd edn.) Oxford: Blackwell Science.Google Scholar
Thomas, L., Laake, J. L., Derry, J. F.et al. (1998). Distance 3.5. Research Unit for Wildlife Population Assessment. St. Andrews, UK: University of St. Andrews.Google Scholar
Tutin, C. E. G., Parnell, R. J., White, L. J. T. & Fernandez, M. (1995). Nest building by lowland gorillas in Lope Reserve, Gabon: environmental influences and implications for censusing. Int. J. Primatol. 16, 53–76.CrossRefGoogle Scholar
Krunkelsven, E., Inogwabini, B.-I. & Draulans, D. (2000). A survey of bonobos and other large mammals in Salonga National Park, Democratic Republic of Congo. Oryx 34, 180–8.CrossRefGoogle Scholar
Walsh, P. D & White, L. J. T. (2005). Evaluating the steady state assumption: simulations of gorilla nest decay. Ecol. Appl. 15, 1342–50.CrossRefGoogle Scholar
Wemmer, C., Kunz, T. H., Lundie-Jenkins, G. & McShea, W. J. (1996). Mammalian signs. In Measuring and Monitoring Biological Diversity: Standard Methods for Mammals, ed. Wilson, D. E., Cole, F. R., Nichols, J. D., Rudran, R. &. Foster, M. S., pp. 157–76. Washington, D.C.: Smithsonian Institute Press.Google Scholar
White, L. & Edwards, A. (2000). Methods for assessing the status of animal populations. In Conservation Research in African Rain Forests: A Technical Handbook, ed. White, L. & Edwards, A., pp. 225–73. New York: Wildlife Conservation Society.Google Scholar
www.ruwpa.st-and.ac.uk/distance/ – for Distance sampling.

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