Os fatores que influenciam a diversidade de artrópodes ectoparasitos no morcego hospedeiro incluem o tipo de abrigo e o comportamento social da espécie hospedeira. Aspectos como sexo, condição reprodutiva e tamanho do hospedeiro podem influenciar a distribuição e a abundância dos ectoparasitos. Este trabalho teve como objetivo analisar a variação no parasitismo de estreblídeos em Phyllostomus hastatus, considerando os sexos e diferentes abrigos. Os morcegos foram capturados em quatro casas na Ilha da Marambaia, município de Mangaratiba, e em uma casa na Universidade Federal Rural do Rio de Janeiro, município de Seropédica. Foram capturados 65 fêmeas e 50 machos de P. hastatus e 664 dípteros estreblídeos distribuídos em quatro espécies: Aspidoptera phyllostomatis, Strebla consocia, Trichobius complexo “dugesii” e Trichobius longipes. A espécie T. longipes representou mais de 99% das capturas de Streblidae. Fêmeas de morcegos foram mais parasitadas que os machos, tanto em prevalência quanto em intensidade média. O total de parasitos não variou entre os morcegos residentes e os não residentes. O modelo considerado entre o total de T. longipes, o sexo e o abrigo para indivíduos residentes mostrou-se significativo. O total de parasitos em machos não difere entre aqueles oriundos de abrigos de machos solteiros e de abrigos heterossexuais. As diferenças entre os abrigos refletem a diferença no parasitismo entre os sexos dos hospedeiros.

Among the factors that influence the diversity of ectoparasites on bat hosts are the kind of roost and the host's social behavior. Other factors such as sex, reproductive condition and host size may influence the distribution and abundance of ectoparasites. The aim of the present study was to analyze the variation in Streblidae ectoparasites on the bat Phyllostomus hastatus, according to sex and roost type. We caught bats in four houses on Marambaia Island, municipality of Mangaratiba, and in one house at the Federal Rural University of Rio de Janeiro, municipality of Seropédica. We caught 65 females and 50 males of P. hastatus and 664 streblids of four species: Aspidoptera phyllostomatis, Strebla consocia, Trichobius“dugesii” complex and Trichobius longipes. The species T. longipes accounted for more than 99% of all the ectoparasites caught. Female bats were more parasitized than males, in terms of both prevalence and average intensity. The total number of parasites did not vary between resident and non-resident bats. The relationship between the number of individuals of T. longipes and sex and roost type was significant for resident bats. The total number of parasites on males did not differ between bachelor roosts and mixed-sex roosts. The differences found between roosts reflected the differences between the sexes.

Various studies have focused on the richness and abundance of bats in tropical forests and how the composition of these forests affects bat assemblages, but there are few studies on the relationship of bats with riparian forests. The aim of this study was to ascertain the differences among bat assemblages of three riparian forest areas of the Tinguá region, state of Rio de Janeiro, Brazil. These areas were: I) an agricultural area (Takume); II) a reforested area in primary succession (Canavarro); and III) an area with late secondary vegetation (Tinguá Biological Reserve). Assessments of bat species composition in these areas may shed light on how anthropogenic modifications in riparian forests can influence local bat assemblages. Bats were captured with mist nets during 72 sampling nights. Total bat abundance was 1,511 individuals in 26 species. The three areas differed in their species composition. The Tinguá Biological Reserve was the richest area, Canavarro presented the lowest diversity and the highest abundance of individuals, and the evenness index was highest in Takume. The differences found in the composition and ecological indices indicate that bat assemblages have distinct characteristics in the three areas studied, with varied degrees of transformation and anthropization.

O presente estudo registra a ocorrência de Parakosa flexipes (Pinichpongse) pela primeira vez no Brasil, bem como seus sítios de infecção em Molossus rufus E. Geoffroy. Foram capturados 38 morcegos com redes-de-neblina, dispostas próximas a uma residência da "Mars Center for Cocoa Science" no Sul da Bahia, dos quais 14 (37%) estavam parasitados por P. flexipes. Parakosa flexipes foi observada parasitando M. rufus em pelos evidentemente maiores que os demais distribuídos pelo corpo do morcego, onde se pôde observar até três parasitos em um único pelo.

The present study reports the occurrence of Parakosa flexipes (Pinichpongse) (Chirodiscidae) for the first time in Brazil, along with its infection sites on Molossus rufus E. Geoffroy. Thirty-eight bats were caught using mist nets that were placed near a house at the Mars Center for Cocoa Science in the state of Bahia, of which 14 (37%) were parasitized by P. flexipes. Parakosa flexipes was observed parasitizing M. rufus on hairs that were evidently longer than others distributed over the bat's body, where up to three parasites could be spotted on a single hair.

In the present study, we investigated the prevalence and intensity of Hectopsylla pulex infection in Molossus rufus and Molossus molossus, the parasite's choice of attachment site, and whether this host-parasite system varies with host size. Twenty-four bats were captured by hand from the roof of a house in Southeastern Brazil. M. rufus exhibited a prevalence of 71.4% and the mean intensity averaged 5 ectoparasites per bat. M. molossus exhibited a prevalence of 90%, and the average mean intensity was 2.11 ectoparasites. The attachment sites were: ear, tragus, shoulder blade and tibia, anus, wing, axilla, mouth and dactylopatagium. A positive correlation was observed between the bats' weight and the number of fleas.