title: Patterns of infestation by chigger mites in four diurnal lizard species from a Restinga habitat (Jurubatiba) of southeastern Brazil.
abstract: We studied the parasitism by larvae of the chigger mite Eutrombicula alfreddugesi on the lizard community of Restinga de Jurubatiba, Rio de Janeiro State, Southeastern Brazil. We investigated the patterns of infestation (prevalence and intensity) of chigger mites in four sympatric lizards: Tropidurus torquatus, Mabuya agilis, M. macrorhyncha and Cnemidophorus littoralis. All lizards collected were checked for the presence of mites, which were counted under stereomicroscope. We tested the relationship between intensity of infestation and lizard body size for each species using regression analysis. The prevalences and mean intensities (+ one standard deviation) of infestation on each host species were, respectively: 100%; 86.4 + 94.6 in T. torquatus (n = 62); 100%; 20.9 + 9.3 in M. agilis (n = 7); 100%; 11.1 + 13.1 in M. macrorhyncha (n = 12); and 95.2%; 19.1 + 16.8 in C. littoralis (n = 21). Only for C. littoralis did body size significantly affect the intensity of infestation (r = 0.27, p = 0.02). For all lizard species, the body parts where chiggers occurred with the highest intensity were those of skin folds and joint regions.
authors.affiliation: Setor de Ecologia, Instituto de Biologia, Universidade do Estado do Rio de Janeiro, UERJ, CEP 20550-013, Rio de Janeiro, RJ, Brazil.
authors.forename: M
authors.initials: M
authors.lastname: Cunha-Barros
authors.forename: M
authors.initials: M
authors.lastname: Van Sluys
authors.forename: D
authors.initials: D
authors.lastname: Vrcibradic
authors.forename: C A
authors.initials: CA
authors.lastname: Galdino
authors.forename: F H
authors.initials: FH
authors.lastname: Hatano
authors.forename: C F
authors.initials: CF
authors.lastname: Rocha
mesh_terms: D000818:Animals; D001938:Brazil; D006790:Host-Parasite Interactions; D008116:Lizards / Q000469:parasitology*; D008924:Mite Infestations / Q000662:veterinary*; D008925:Mites / Q000502:physiology; D015995:Prevalence