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6 - Estimating Travel Distance and Linearity of Primate Routes

Ideas on How to Clean and Smooth Track Data Collected with a Handheld GPS

from Part I - GPS for Primatologists

Published online by Cambridge University Press:  29 January 2021

Francine L. Dolins
University of Michigan, Dearborn
Christopher A. Shaffer
Grand Valley State University, Michigan
Leila M. Porter
Northern Illinois University
Jena R. Hickey
University of Georgia
Nathan P. Nibbelink
University of Georgia
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Primatologists use data collected by GPS devices to answer a wide variety of scientific questions. GPS data on locations where individuals were recorded as present or absent can provide insight into primate genetic diversity, dispersal patterns, densities, and habitat suitability (e.g., Guschanski et al. 2009; Hickey et al. 2012; Junker et al. 2012; Kouakou et al. 2009). GPS data on locations of primates’ daily travel paths provide an even wider range of information. Knowing how locations change over time can inform us on disease transmission probabilities, the impact of seasonality in food availability, or differences in social organization (e.g., Lehmann & Boesch 2005; Olupot et al. 1997; Walsh et al. 2005). Calculations of travel distances reveal indices of energy expenditure (e.g., Steudel 2000), while calculations of travel speed provide information on vigilance behavior, levels of food competition, and anticipation of food finding (e.g., Janmaat et al. 2006; Noser & Byrne 2009; Pochron 2001). In addition, travel shape (e.g., linearity of or directional changes in the travel path) can help us reveal cognitive abilities, such as spatio-temporal memory or planning skills (Milton 2000; Noser & Byrne 2007; Valero & Byrne 2007). Lastly, knowledge about directional changes improves our understanding of the importance of specific locations in the habitat, such as fruit trees (Asensio et al. 2011; Byrne et al. 2009). Within this large number of studies, very few reported that GPS devices make errors that can affect the scientific conclusions that are drawn. Even fewer studies investigated how we can limit or correct these errors. In this chapter, we therefore discuss the issues we encountered when using a handheld commercial GPS device (Garmin GPSMAP® 60CSx) to estimate travel locations of wild chimpanzees (Pan troglodytes verus) in a West African rain forest. We present methods we used for testing the accuracy of the GPS device and provide primatologists with ideas on how to clean and smooth track data.

Spatial Analysis in Field Primatology
Applying GIS at Varying Scales
, pp. 106 - 120
Publisher: Cambridge University Press
Print publication year: 2021

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Asensio, N., Brockelman, W. Y., Malaivijitnond, , Reichard, S., U. H. 2011. Gibbon travel paths are goal oriented. Animal Cognition 14: 395405.CrossRefGoogle ScholarPubMed
Byrne, R. W., Noser, R. N., Bates, L. A., and Jupp, P. E. 2009. How did they get here from there? Detecting changes of direction in terrestrial ranging. Animal Behaviour 77: 619631.CrossRefGoogle Scholar
Coyne, M. S. and Godley, B. J. 2005. Satellite tracking and analysis tool (STAT): an integrated system for archiving, analyzing and mapping animal track data. Marine Ecology Progress Series 301: 17.CrossRefGoogle Scholar
Guschanski, K., Vigilant, L., McNeilage, A., et al. 2009. Counting elusive animals: comparison of a field and genetic census of the entire population of mountain gorillas of Bwindi Impenetrable National Park, Uganda. Biological Conservation 142: 290300.CrossRefGoogle Scholar
Hickey, J. R., Carroll, J. P., and Nibbelink, N. P. 2012. Applying landscape metrics to characterize potential habitat of bonobos (Pan paniscus) in the Maringa-Lopori-Wamba landscape, Democratic Republic of Congo. International Journal of Primatology 33: 381400.CrossRefGoogle Scholar
Janmaat, K. R. L., Byrne, R. W., and Zuberbühler, K. 2006. Evidence for spatial memory of fruiting states of rainforest fruit in wild ranging mangabeys. Animal Behaviour 71: 797807.CrossRefGoogle Scholar
Junker, J., Blake, S., Boesch, C., et al. 2012. Recent decline in suitable environmental conditions for African great apes. Diversity and Distribution 18: 10771091.CrossRefGoogle Scholar
Kouakou, C. Y., Boesch, C., and Kühl, H. 2009. Estimating chimpanzee population size with nest counts: validating methods in Taï National Park. American Journal of Primatology 71(6): 7176.CrossRefGoogle ScholarPubMed
Lehmann, J. and Boesch, C. 2005. Bisexually-bonded ranging in chimpanzees (Pan troglodytes verus). Behavioral Ecology and Sociobiology 57: 525535.CrossRefGoogle Scholar
Milton, K. 2000. Quo Vadis? Tactics of food search and group movement in primates and other animals. Pages 375417 in On the Move: How and Why Animals Travel in Groups. Boinski, S., and Garber, P. A. (Eds.). University of Chicago Press, Chicago, IL.Google Scholar
Noser, R. and Byrne, R. W. 2007. Travel routes and planning of visits to out-of-sight resources in wild chacma baboons (Papio ursinus). Animal Behaviour 73: 257266.CrossRefGoogle Scholar
Noser, R. and Byrne, R. W. 2009. How do wild baboons (Papio ursinus) plan their routes? Travel among multiple high-quality food sources with inter-group competition. Animal Cognition 13: 145155.CrossRefGoogle ScholarPubMed
Olupot, W., Chapman, C. A., Waser, P. M., and Isabirye-Basuta, G. 1997. Mangabey (Cercocebus albigena) ranging patterns in relation to fruit availability and the risk of parasite infection in Kibale National Park, Uganda. American Journal of Primatology 43: 6578.3.0.CO;2-W>CrossRefGoogle ScholarPubMed
Patterson, T. A., Thomas, L., Wilcox, C., Ovaskainen, O., and Matthiopoulos, J. 2008. State-space models of individual animal movement. Trends in Ecology and Evolution 23: 8794.CrossRefGoogle ScholarPubMed
Pochron, S. 2001. Can concurrent speed and directness of travel indicate purposeful encounter in the yellow baboons (Papio hamadryas cynocephalus) of Ruaha National Park, Tanzania? International Journal of Primatology 22(5): 773785.CrossRefGoogle Scholar
R Development Core Team. 2012. R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna.Google Scholar
Steudel, K. 2000. The physiology and energetics of movement effects on individual and groups. Pages 923 in On the Move: How and Why Animals Travel in Groups. Boinski, S. and Garber, P. A. (Eds.). University of Chicago Press, Chicago, IL.Google Scholar
Tremblay, Y., Robinson, P. W., and Costa, D. P. 2009. A parsimonious approach to modelling animal movement data. PLoS ONE 4(3): 4711.CrossRefGoogle Scholar
Valero, A. and Byrne, R. W. 2007. Spider monkey ranging patterns in Mexican subtropical forest: do travel routes reflect planning? Animal Cognition 10: 305315.CrossRefGoogle ScholarPubMed
Walsh, P. D., Biek, R., and Real, L. A. 2005. Wave-like spread of ebola Zaire. PLoS Biology 3(11): e371.CrossRefGoogle ScholarPubMed

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