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Emerging Avian Disease$
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Ellen Paul

Print publication date: 2012

Print ISBN-13: 9780520272378

Published to California Scholarship Online: September 2012

DOI: 10.1525/california/9780520272378.001.0001

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Ecological Associations of West Nile Virus and Avian Hosts in an Arid Environment

Ecological Associations of West Nile Virus and Avian Hosts in an Arid Environment

Chapter:
(p.3) Chapter One Ecological Associations of West Nile Virus and Avian Hosts in an Arid Environment
Source:
Emerging Avian Disease
Author(s):

Holly B. Vuong

Donald F. Caccamise

Marta Remmenga

Rebecca Creamer

Publisher:
University of California Press
DOI:10.1525/california/9780520272378.003.0001

We evaluated disease associations of West Nile virus (WNV) with avian hosts in four key habitats of southern New Mexico (agriculture, desert, riparian, and urban). Our goal was to examine the role of avian life history traits in transmission of WNV and to evaluate possible mechanisms to explain differences in seroprevalence among avian communities. Seroprevalence was highest in Summer Tanagers (Piranga rubra, 39%) and American Robins (Turdus migratorius, 33%). Serosurveys of bird communities indicated differences among habitats, age, and resident status. Urban and agricultural habitats had higher seroprevalence than desert and riparian habitats. After-hatch-year birds had higher seroprevalence than hatch-year birds. Seroprevalence in permanent resident and local breeding species were higher than migrants and winter residents. Males had higher seroprevalence in 2004, while females were higher in 2005. Analyses among communities indicated negative relationships between seroprevalence and avian species diversity and richness. Desert and riparian habitats had higher diversity and lower seroprevalence compared to urban and agriculture. This study revealed associations between WNV and avian life history traits, providing insights into mechanisms of transmission in the arid Southwest. In addition, we found relationships between complexity of avian host communities (e.g., species diversity, species richness) and patterns in seroprevalence of WNV in avian host species.

Keywords:   avian community, desert, habitat, life history, seroprevalence, southern New Mexico, West Nile virus, WNV

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