Ectoparasites of bats (Mammalia: Chiroptera) in the state of RIO de Janeiro: Population dynamics in refuges
Host-parasite, Streblidae, Spinturnicidae e Macronyssidae.
The ectoparasites of bats establish with their hosts a strong relation of dependence, mainly the dípteros streblídeos. However, there are few studies on ectoparasites of bats, mainly in refuges, due to the difficulty of finding the shelters of these animals. For this general objective of this work was to report the parasitism of bats in urban refuges in the State of Rio de Janeiro. Having the first chapter with the objective of (a) Register the hematophagous arthropod parasites of bats that use urban refuges; (b) To verify the prevalence, average abundance and intensity of ectoparasites for each host species per sampled refuge; (c) Verify sex ratio of parasites; (d) Check the possible specificity of the ectoparasites found. Four refuges belonging to three municipalities of the State of Rio de Janeiro, Seropédica and Nova Iguaçu were sampled. Bats were captured with mist nets and accommodated in cloth sacks. Subsequently, they were measured, identified and classified according to sex and age. Their ectoparasites were removed with the use of fine-tipped tweezers and placed in tubes with absolute ethanol and identified using dichotomous keys. A total of 1,252 bats were captured in the four refuges sampled, of which 21.48% (N = 269) were recaptured. Fourteen species belonging to three families, Phyllostomidae, Molossidae and Vespertillionidae, were identified in the four refuges. 965 ectoparasites were identified, being 697 Streblidae, 263 Spinturnicidae and 5 Nycteribiidae. The group regarding other Acari could not be counted and only identified by sampling in the plastic tubes per host / collection. It was concluded that the accomplishment of works in refuges can provide the increase of species of ectoparasites, even of hosts already widely studied. In chapter II the objective was (a) to verify possible seasonal patterns of ectoparasites of bats; (b) to verify the prevalence, average abundance and intensity of ectoparasites throughout the year for each sampled refuge; (c) To determine the population fluctuation of the ectoparasites of bats in the different refuges during the collection (d) to verify the factors that will influence the parasitism as: Host sex, reproductive condition, number of bats and species of bats and ) Check that the entry of new animals into refuges is related to the average abundance of ectoparasites in the following months. To verify the seasonality of the abundances of ectoparasites in the different months of collection, the ANOVA test was used and for the Tukey test it was used to know in which months the difference was. Before, the normality of the data was tested through the Shapiro-Wilk test with PAST software version 3.01. The highest values of prevalence were found in winter and those of medium intensity in the summer. Female males and young males were more parasitized to Spinturnicidae and the smaller parasitized bats to Streblidae. The study may contribute to better understand the preferences of ectoparasites present in bats in urban refuges.