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Host-parasite interaction explains variation in prevalence of avian haemosporidians at the community level

View ORCID ProfileL. Garcia-Longoria, A. Marzal, F. de Lope, L. Z. Garamszegi
doi: https://doi.org/10.1101/432260
L. Garcia-Longoria
1Departamento de Anatomía, Biología Celular y Zoología, Universidad de Extremadura, E-506071 Badajoz (Spain).
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  • For correspondence: luzlongoria@unex.es
A. Marzal
1Departamento de Anatomía, Biología Celular y Zoología, Universidad de Extremadura, E-506071 Badajoz (Spain).
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F. de Lope
1Departamento de Anatomía, Biología Celular y Zoología, Universidad de Extremadura, E-506071 Badajoz (Spain).
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L. Z. Garamszegi
2Department of Evolutionary Ecology, Estación Biológica de Doñana-CSIC, E-41092 Seville, Spain
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ABSTRACT

Parasites are a selective force that shape host community structure and dynamics, but host communities can also influence parasitism. Understanding the dual nature from host-parasite interactions can be facilitated by quantifying the variation in parasite prevalence (i.e. the proportion of infected host individuals in a population) among host species and then comparing that variation to other ecological factors that are known to also shape host communities. Avian haemosporidian parasites (e.g. Plasmodium and Haemoproteus) are abundant and widespread representing an excellent model for the study of host-parasite interactions. Several geographic and environmental factors have been suggested to determine prevalence of avian haemosporidians in bird communities. However, much remains to be known regarding whether host and parasite traits, represented by phylogenetic distances among species and degree of specialization in host-parasite relationships, can influence parasite prevalence. The aims of this study were to analyze factors affecting prevalence in a bird community and to test whether the degree of parasite specialization on their hosts is determined by host traits. Our statistical analyses suggest that prevalence is mainly determined by the interaction between host species and parasite lineages where tolerance and/or susceptibility to parasites plays an essential role. Additionally, we found that although some of the parasite lineages infected a low number of bird species, the species they infected were distantly related and therefore the parasites themselves should not be considered typical host specialists. Prevalence was higher for generalist than for specialist parasites in some, but not all, host species. These results suggest that prevalence mainly results from the interaction between host immune defences and parasite exploitation strategies wherein the result of an association between particular parasite lineages and particular host species is idiosyncratic.

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Posted October 01, 2018.
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Host-parasite interaction explains variation in prevalence of avian haemosporidians at the community level
L. Garcia-Longoria, A. Marzal, F. de Lope, L. Z. Garamszegi
bioRxiv 432260; doi: https://doi.org/10.1101/432260
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Host-parasite interaction explains variation in prevalence of avian haemosporidians at the community level
L. Garcia-Longoria, A. Marzal, F. de Lope, L. Z. Garamszegi
bioRxiv 432260; doi: https://doi.org/10.1101/432260

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