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Predicting primate-parasite associations using exponential random graph models.

James P Herrera1, James Moody2, Charles L Nunn3,4

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Summary
This summary is machine-generated.

Threatened primate species host fewer parasites, but share more, indicating a loss of specialists and a rise in generalist parasites. This study used network analysis to explore host-parasite interactions and traits.

Keywords:
bipartite networkcomparative analysisnetwork analysisthreat status

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Area of Science:

  • Ecology
  • Parasitology
  • Network Analysis

Background:

  • Host-parasite interactions are shaped by host exposure, susceptibility, and parasite transmission modes.
  • Network analysis offers advanced tools to study ecological networks and host-parasite relationships.

Purpose of the Study:

  • To investigate the biogeographic, phylogenetic, and ecological traits influencing interactions between nonhuman primates and their parasites.
  • To test existing hypotheses and explore new predictors of host-parasite associations using a comprehensive database.

Main Methods:

  • Utilized a network-based framework, specifically exponential random graph models (ERGMs).
  • Analyzed an expanded host-parasite database with 213 primate nodes, 763 parasite nodes, and 2319 interactions.
  • Incorporated analyses of phylogenetic relatedness, sampling effort, and spatial overlap among hosts.

Main Results:

  • More threatened hosts exhibited fewer parasites, independent of their geographic range.
  • Threatened species shared more parasites, suggesting a loss of specialist parasites and reliance on generalist ones.
  • Viruses, protozoa, and helminths displayed broader host ranges than bacteria or fungi.
  • Parasites infecting non-primates were more likely to infect multiple primate species.

Conclusions:

  • The ERGM approach provides a comprehensive view of factors structuring host-parasite networks.
  • Identified new associations between host and parasite traits, highlighting the importance of network structure in host-parasite dynamics.
  • Results support previous findings and reveal novel insights into primate-parasite ecological networks.