Publications

genotoxicological analyses of insectivorous bats (mammalia: chiroptera) in central brazil: the oral epithelium as an indicator of environmental quality.	the micronucleus (mn) test of the human buccal mucosa was developed more than 30 years ago, although this technique has only recently been applied to wild mammals. this paper presents a pioneering study in the genotoxicological evaluation of the exfoliated cells of the buccal mucosa of bats. the assay was applied to two insectivorous bat species (noctilio albiventris and pteronotus parnellii) sampled in riparian corridors located in the city of palmas (capital of the brazilian state of tocantins ...	2019	30458380
survey on helminths and protozoa of free-living neotropical bats from northeastern brazil.	bats are considered important reservoirs of pathogens of veterinary and medical relevance worldwide. however, despite the increasing attention paid towards the central role of bats in the spreading of some zoonotic infections, studies on their own parasites remain patchy especially in neotropical regions. understanding the relationships occurring between bats and their pathogens is a crucial step to determine the implications undermining the ecology and biology of these animals. the present stud ...	2018	29883575
new rickettsia species in soft ticks ornithodoros hasei collected from bats in french guiana.	in french guiana, located on the northeastern coast of south america, bats of different species are very numerous. the infection of bats and their ticks with zoonotic bacteria, especially rickettsia species, is so far unknown. in order to improve knowledge of these zoonotic pathogens in this french overseas department, the presence and diversity of tick-borne bacteria was investigated with molecular tools in bat ticks. in the beginning of 2013, 32 bats were caught in saint-jean-du-maroni, an are ...	2016	27639932
ticks infesting bats (mammalia: chiroptera) in the brazilian pantanal.	ticks associated with bats have been poorly documented in the neotropical zoogeographical region. in this study, a total of 1028 bats were sampled for tick infestations in the southern portion of the brazilian pantanal. a total of 368 ticks, morphologically identified as ornithodoros hasei (n = 364) and o. mimon (n = 4), were collected from the following bat species: artibeus planirostris, platyrrhinus lineatus, phyllostomus hastatus, mimon crenulatum and noctilio albiventris. morphological iden ...	2016	26912332
comparative analysis of the male reproductive accessory glands of bats noctilio albiventris (noctilionidae) and rhynchonycteris naso (emballonuridae).	in eutherian mammals, the male reproductive accessory glands (rags) comprise the prostate, bulbourethral glands, ampullary glands, and the seminal vesicles. their composition, anatomy and function vary widely between species. this study aimed to characterize histologically and compare the rags of bats. the rags of noctilio albiventris (noctilionidae) and rhynchonycteris naso (emballonuridae) were studied using anatomical and histological methods, and were reconstructed three dimensionally. the r ...	2016	27481105
evidence of bartonella spp. in blood and ticks (ornithodoros hasei) of bats, in french guiana.	we screened blood from 59 bats from french guiana for bartonella spp. pcrs were positive for 13.6% and culture was positive in one noctilio albiventris and one pteronotus parnellii, as well as in ornithodoros hasei ticks collected from bats. two isolated strains represent possible two new species.	2016	27305604
metabolic costs of bat echolocation in a non-foraging context support a role in communication.	the exploitation of information is a key adaptive behavior of social animals, and many animals produce costly signals to communicate with conspecifics. in contrast, bats produce ultrasound for auto-communication, i.e., they emit ultrasound calls and behave in response to the received echo. however, ultrasound echolocation calls produced by non-flying bats looking for food are energetically costly. thus, if they are produced in a non-foraging or navigational context this indicates an energetic in ...	2013	23576991
independent evolution of functional mhc class ii drb genes in new world bat species.	genes of the major histocompatibility complex (mhc) play a pivotal role in the vertebrate immune system and are attractive markers for functional, fitness-related, genetic variation. although bats (chiroptera) represent the second largest mammalian order and are prone to various emerging infectious diseases, little is known about mhc evolution in bats. in the present study, we examined expressed mhc class ii drb sequences (exons 1 to 4) of new world bat species, saccopteryx bilineata, carollia p ...	2012	22426641
evidence for the 'good genes' model: association of mhc class ii drb alleles with ectoparasitism and reproductive state in the neotropical lesser bulldog bat, noctilio albiventris.	the adaptive immune system has a major impact on parasite resistance and life history strategies. immunological defence is costly both in terms of immediate activation and long-term maintenance. the 'good genes' model predicts that males with genotypes that promote a good disease resistance have the ability to allocate more resources to reproductive effort which favours the transmission of good alleles into future generations. our study shows a correlation between immune gene constitution (major ...	2012	22615910
bat-species richness in the pantanal floodplain and its surrounding uplands.	we studied the bat fauna of the pantanal floodplain and its surrounding plateaus in mato grosso do sul, brazil, based on the scientific collection at universidade anhanguera-uniderp and on the projeto morcegos do pantanal data bank at ufms, comprising 9,037 captures of 56 species recorded from 1994 to 2007. the pantanal surveys were carried out in the nhecolândia, aquidauana, miranda, and paraguai sub-regions; the uplands surveys took place in the maracaju, bodoquena, and urucum formations. bat ...	2011	21537604
mhc class ii drb diversity, selection pattern and population structure in a neotropical bat species, noctilio albiventris.	genes of the major histocompatibility complex (mhc) have a crucial role in the immune response of vertebrates, alter the individual odour and are involved in shaping mating preferences. pathogen-mediated selection, sexual selection and maternal-fetal interactions have been proposed as the main drivers of frequently observed high levels of polymorphism in functionally important parts of the mhc. bats constitute the second largest mammalian order and have recently emerged as important vectors of i ...	2011	21245894
refueling while flying: foraging bats combust food rapidly and directly to power flight.	flying vertebrates, such as bats, face exceptionally high energy costs during active flapping flight. once airborne, energy turnover may exceed basal metabolic rate by a factor of up to 15. here, we asked whether fuel that powers flight originates from exogenous (dietary nutrients), endogenous sources (mostly body lipids or glycogen), or a combination of both. since most insectivorous bats fly continuously over relatively long time periods during foraging, we assumed that slowly mobilized glycog ...	2010	21058551
experimental evidence for group hunting via eavesdropping in echolocating bats.	group foraging has been suggested as an important factor for the evolution of sociality. however, visual cues are predominantly used to gain information about group members' foraging success in diurnally foraging animals such as birds, where group foraging has been studied most intensively. by contrast, nocturnal animals, such as bats, would have to rely on other cues or signals to coordinate foraging. we investigated the role of echolocation calls as inadvertently produced cues for social forag ...	2009	19419986
species richness and abundance of bats in fragments of the stational semidecidual forest, upper paraná river, southern brazil.	the upper paraná river floodplain is inserted in a region of the mata atlântica biome, which is a critical area to preserve. due to the scarcity of researches about the chiropterofauna in this region, the present study investigated species richness and abundance of bats in remnants from the stational semidecidual forest of the upper paraná river, southern brazil. samplings were taken every month, from january to december 2006, using 32 mist nets with 8.0 x 2.5 m, resulting in 640 m2/h and totali ...	2009	19738978
auditory scene analysis by echolocation in bats.	echolocating bats transmit ultrasonic vocalizations and use information contained in the reflected sounds to analyze the auditory scene. auditory scene analysis, a phenomenon that applies broadly to all hearing vertebrates, involves the grouping and segregation of sounds to perceptually organize information about auditory objects. the perceptual organization of sound is influenced by the spectral and temporal characteristics of acoustic signals. in the case of the echolocating bat, its active co ...	2001	11681397
frequency discrimination of brief tonal steps as a function of frequency in the lesser bulldog bat.	in a two-alternative, forced-choice task lesser bulldog bats were trained to distinguish between a pure tone pulse and a pulse composed of a series of brief tonal steps oscillating between two different frequencies. the tone-step pulse gradually approximates the pure tone pulse as the frequency difference between the steps becomes progressively smaller. frequency difference limens for the brief tonal frequency steps were determined for a broad range of ultrasonic frequencies. the variation in to ...	1999	10573865
unusual aspects of inner cell mass formation, endoderm differentiation, reichert's membrane development, and amniogenesis in the lesser bulldog bat, noctilio albiventris.	the early embryogenesis of the lesser bulldog bat, noctilio albiventris (family noctilionidae), was examined histologically in 59 pregnant females collected from a reproductively synchronized population in colombia.	1996	8888970
frequency modulated sound pattern analysis in the lesser bulldog bat: the role of interactions between adjacent frequency elements of complex sounds.	a stereotyped approach phase vocalization response of noctilio albiventris to artificial echoes simulating a virtual approaching object was used to assess the ability of the bat to analyze and extract distance information from the artificial echoes. the performance of the bats depended on the temporal pattern of frequency change of the continuously sweeping frequency modulated (fm) component of the signals. when the bats were presented with a cf/fm signal containing a time-reversed upward fm swe ...	1995	7823306
complex sound analysis in the lesser bulldog bat: evidence for a mechanism for processing frequency elements of frequency modulated signals over restricted time intervals.	a stereotypical approach phase vocalization response of the lesser bulldog bat, noctilio albiventris, to artificial echoes simulating a virtual approaching object was used to assess the ability of the bat to analyze and extract distance information from the artificial echoes. the performance of the bat was not significantly different when presented with naturally structured cf/fm echoes containing fm elements that sweep continuously from about 75-55 khz in 4 ms or with cf/fm echoes containing fm ...	1994	8006856
temperature effects on metabolism, ventilation, and oxygen extraction in a neotropical bat.	we examined the relationship between ambient temperature (ta), body temperature (tb), oxygen consumption (vo2), carbon dioxide production (vco2), evaporative water loss (mh2o), respiratory frequency (f), tidal volume (vt), minute volume (vi), and oxygen extraction (eo2) in the neotropical bat noctilio albiventris (mean mass 40 g). the factorial aerobic scope was 7.2 between ta of 1-35 degrees c (vo2 = 0.119 and 0.0165 ml/(g.min), respectively). the respiratory exchange ratio (vco2/vo2) did not c ...	1990	2259796
reproductive failure due to the entrapment of oocytes in luteinized follicles of the little bulldog bat (noctilio albiventris).	the reproductive tracts of 112 female little bulldog bats collected around the onset of a breeding season in the cauca valley of colombia were examined histologically. of the 88 females with luteinizing/luteinized follicles or new cl, 72 carried tubal ova or uterine blastocysts and 16 were non-pregnant. in 14 of the latter follicle rupture had apparently failed to occur, and the oocyte or a collapsed zona pellucida was found within a luteinizing or luteinized follicle. these structures appeared ...	1984	6726691
unilateral oviductal and uterine reactions in the little bulldog bat, noctilio albiventris.		1978	568962
preimplantation development, fate of the zona pellucida, and observations on the glycogen-rich oviduct of the little bulldog bat, noctilio albiventris.	the reproductive biology of noctilio albiventris was investigated histologically in 112 females collected at the start of their synchronized breeding season during two different sampling years in the cauca valley of colombia. both ovaries were functional, but the animals were generally observed to be monovular. embryonic development in the oviduct was found to proceed to blastocyst formation and loss of the zona pellucida. in 22 animals the discarded zona had been left behind in the oviduct upon ...	1977	562617