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Macroparasite dynamics of migratory host populations

Author

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  • Peacock, Stephanie J.
  • Bouhours, Juliette
  • Lewis, Mark A.
  • Molnár, Péter K.

Abstract

Spatial variability in host density is a key factor affecting disease dynamics of wildlife, and yet there are few spatially explicit models of host–macroparasite dynamics. This limits our understanding of parasitism in migratory hosts, whose densities change considerably in both space and time. In this paper, we develop a model for host–macroparasite dynamics that considers the directional movement of host populations and their associated parasites. We include spatiotemporal changes in the mean and variance in parasite burden per host, as well as parasite-mediated host mortality and parasite-mediated migratory ability. Reduced migratory ability with increasing parasitism results in heavily infested hosts halting their migration, and higher parasite burdens in stationary hosts than in moving hosts. Simulations reveal the potential for positive feedbacks between parasite-reduced migratory ability and increasing parasite burdens at infection hotspots, such as stopover sites, that may lead to parasite-induced migratory stalling. This framework could help understand how global change might influence wildlife disease via changes to migratory patterns and parasite demographic rates.

Suggested Citation

  • Peacock, Stephanie J. & Bouhours, Juliette & Lewis, Mark A. & Molnár, Péter K., 2018. "Macroparasite dynamics of migratory host populations," Theoretical Population Biology, Elsevier, vol. 120(C), pages 29-41.
    • Handle: RePEc:eee:thpobi:v:120:y:2018:i:c:p:29-41
    DOI: 10.1016/j.tpb.2017.12.005
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    References listed on IDEAS

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    1. David S Wilcove & Martin Wikelski, 2008. "Going, Going, Gone: Is Animal Migration Disappearing," PLOS Biology, Public Library of Science, vol. 6(7), pages 1-4, July.
    2. Morgan, E.R. & Medley, G.F. & Torgerson, P.R. & Shaikenov, B.S. & Milner-Gulland, E.J., 2007. "Parasite transmission in a migratory multiple host system," Ecological Modelling, Elsevier, vol. 200(3), pages 511-520.
    3. Mathieu Pruvot & Manigandan Lejeune & Susan Kutz & Wendy Hutchins & Marco Musiani & Alessandro Massolo & Karin Orsel, 2016. "Better Alone or in Ill Company? The Effect of Migration and Inter-Species Comingling on Fascioloides magna Infection in Elk," PLOS ONE, Public Library of Science, vol. 11(7), pages 1-16, July.
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