Luiz Antonio Costa Gomes

Bats from the Restinga of Praia das Neves, state of Espírito Santo, Southeastern Brazil

Studies on bat richness and diversity in coastal sand dunes (‘ restinga’ ) are still scarce. Therefore, the objectives of the present study were to estimate bat richness in the restinga of Praia das Neves (state of Espirito Santo, southeastern Brazil) and to analyze species abundance. Ten sampling nights were carried out in May and July 2008, resulting in a sampling effort of 21,847.5 h.m2. We captured 125 individuals from 17 bat species. In this study, Tonatia saurophila was recorded for the first time not only in the state of Espirito Santo but also in the restinga ecosystem. The most abundant species was Artibeus lituratus with 32% of all captures. Surveys in coastal restingas are urgently needed in order to obtain more information about the bats living in this environment.

Composition of bat assemblages (Mammalia: Chiroptera) in tropical riparian forests

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 Tingua 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 (Tingua 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 Tingua 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.

Species composition and seasonal variation in abundance of Phyllostomidae bats (Chiroptera) in an Atlantic Forest remnant, southeastern Brazil

Abstract Normally, the Phyllostomidae bat community varies in number of individuals depending on food availability, which in turn varies with changes in annual rainfall. The aims of this study were to list species of Phyllostomidae bats in Curió Municipal Natural Park located in the municipality of Paracambi, state of Rio de Janeiro, southeastern Brazil, and determine possible differences in species richness, abundance and composition between rainy and dry seasons. Sampling was carried out between September 2011 and August 2012 with the use of mist nets. The total sampling effort was 51,840 m2 h, and 745 individuals of 18 bat species were caught. Myotis riparius (Vespertilionidae) was the only non-Phyllostomidae species caught. Artibeus lituratus and Carollia perspicillata were the most abundant species. The collector curve did not become stabilized, with 21±2 phyllostomid species being estimated for the park. No significant difference in species richness or change in the community composition was found between seasons; however a higher number of individuals was captured in the rainy season. The occurrence of specie indicator of good-quality habitats (Chrotopterus auritus, Micronycteris microtis and Trachops cirrhosus) and species threatened with extinction (Chiroderma doriae and Dermanura cinerea) indicate that the park is an important forest remnant for the conservation of bats and needs to be monitored.

First record of Parakosa flexipes (Acari: Chirodiscidae) parasitizing a free-tailed bat (Chiroptera: Molossidae) in Brazil

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 bats body, where up to three parasites could be spotted on a single hair.

Long-term bat study on an island in the southeastern Brazilian coast with comparison of richness and composition of species among sites

ABSTRACT Although Rio de Janeiro is one of the best sampled states of Brazil for bats, there are still some poorly studied islands on its coast. Hence, we inventoried the bat species of an island on the southwestern coast of Rio de Janeiro, compared five sites sampled within this island, and compared its bat community with seven other sites in the same region. We carried out sampling in July 1995 and from September 2006 to August 2010, comprising 58 samplings. We captured a total of 1502 individuals of 25 bat species with mist nets set far from roosts, or close to or inside roosts. The most abundant species were Artibeus lituratus, Molossus molossus, and Carollia perspicillata. Total sampling effort was 89,400 m2 h. The present study was one out of five inventories carried out in the southwestern coast of Rio de Janeiro that registered more than 1000 bat individuals from more than 24 bat species. Long-term inventories on islands are still needed, because they can result in a large number of species and captures as observed in the present study.

Morphometric variation in Periglischrus torrealbai (Acari: Spinturnicidae) on three species of host bats (Chiroptera: Phyllostomidae) with a new record of host species

We evaluated morphometric variation of the mite Periglischrus torrealbai (Spinturnicidae) on three species of host bats: Phyllostomus discolor, P. hastatus, and Tonatia bidens (Phyllostomidae). A total of 67 females and 74 males of P. torrealbai were collected from 41 host individuals of these three bat species that were sampled in Brazil, Paraguay, and Peru. Twenty-one measurements from the dorsal side and 28 from the ventral side were recorded from female mites and 21 dorsal and 34 ventral measurements were taken from males. To evaluate morphological variation of P. torrealbai on different species of host bats, principal component analysis and unweighted pair-group method using arithmetic averages cluster analysis with Euclidean distances were used. Both analyses showed three groups of mites clearly separated: group 1 comprised all ectoparasites collected from T. bidens, group 2 included all mites from P. hastatus, and group 3 had all those from P. discolor. This result indicates that P. torrealbai varies morphologically by host bat species and suggests that this nominal species comprises three morphologically distinct species. In the present study, we record for the first time, the association between P. torrealbai and T. bidens. Our data reinforce the high relationship of specificity between Periglischrus mites and phyllostomid bat species.

Bats in a Cerrado landscape of Northern Brazil: species occurrence, influence of environmental heterogeneity and seasonality, and eight new records for the State of Tocantins

Abstract Patterns of bat distribution in Cerrado can be influenced by habitat heterogeneity and seasonal variation. We described the bat fauna in Cerrado landscape during an environment-monitoring program in Tocantins State, Northern Brazil. Additionally, we tested the influence of habitat heterogeneity and seasonality on the abundance and species richness of Phyllostomidae in this region by Generalized Linear Mixed Models. In 2010, we sampled 40 nights (rainy and dry seasons) in four vegetation types of Cerrado biome. Taxonomic identification was based on measurements and qualitative diagnostics. With a sampling effort of 43,965 m2·h, we captured 274 bats of 30 species, 22 genera and six families. Carollia perspicillata was the most abundant species captured. Colinas do Tocantins municipality was richer than Goiantins (26 and 19 species respectively). The best model for abundance was the interaction between heterogeneity and seasonality and the best model for richness was a mix between these two variables. We registered eight new species for the Tocantins including three species considered threatened with extinction at national level and one at global level. Such results highlight that this region is important for new investigations on the Cerrado biome.