Honorary Chair Sir Edmund Hillary 1919-2008	President Daniel A. Bennett	Honorary President Don Walsh, Ph.D.

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EXPEDITIONS Grant Reports   REPORT—YOUTH ACTIVITY FUND Seasonal variation and Potential Fitness Costs of Trombiculid Mite Infestation of Collared Lizards 2005 By Jennifer L. Curtis Expedition Leader: Jennifer L. Curtis Introduction Ectoparasites are hypothesized to decrease the physical condition and perhaps the fitness of their hosts. Larval mites feed on lymph and skin cells and cause skin lesions, inflammation, increased immune activity, and are vectors for disease, and decrease host survivorship. Despite long-standing interest in host-parasite relationships, relatively few studies have examined variation in mite loads among individuals and temporal patterns of mite infestation and abundance, or the possibility that heavy parasite loads have potential fitness consequences for their hosts. During my pilot study in June 2004, I documented extreme (> 10-fold) variation in the number of larval mites on lizards that occupied two separate homogeneous rock habitat patches at the Arcadia Lake (AL), Oklahoma, study site. FULL REPORT in pdf RETURN TO LIST

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