| bats (mammalia: chiroptera) in native and reforested areas in rancho alegre, paraná, brazil. | abstract: generally, natural environments have been transformed into small forest remnants, with the consequent habitat loss and species extinction. the north paraná state is not an exception, since only 2 to 4% of the original ecosystem occurs in small fragments of stational semidecidual forest. we studied the species richness and abundance of bats in two forest fragments from the fazenda congonhas, in rancho alegre city, parana state, brazil. four samplings were undertaken in a legally protect ... | 2010 | 21246993 |
| meiotic analysis of xx/xy and neo-xx/xy sex chromosomes in phyllostomidae by cross-species chromosome painting revealing a common chromosome 15-xy rearrangement in stenodermatinae. | we analyzed the meiotic behavior of the sex chromosomes of the bats glossophaga soricina (xx/xy), artibeus cinereus and uroderma magnirostrum (neo-xx/xy) using multicolor fish. the x chromosome and pair 15 autosome probes are from phyllostomus hastatus and the y from carollia brevicauda. on both species with the neo-xx/xy system, the autosome translocated to the sex chromosomes is the pair 15 in p. hastatus, a synapomorphy. the analysis of meiosis confirms that the x and y have a pseudo-autosoma ... | 2010 | 20635197 |
| a phylogenetic analysis using multidirectional chromosome painting of three species (uroderma magnirostrum, u. bilobatum and artibeus obscurus) of subfamily stenodermatinae (chiroptera-phyllostomidae). | the species of genera uroderma and artibeus are medium-sized bats belonging to the family phyllostomidae and subfamily stenodermatinae (mammalia, chiroptera) from south america. they have a wide distribution in the neotropical region, with two currently recognized species in uroderma and approximately 20 species in artibeus. these two genera have different rates of chromosome evolution, with artibeus probably having retained the ancestral karyotype for the subfamily. we used whole chromosome pai ... | 2013 | 23775139 |
| 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 |
| detection of specific antibody responses to vaccination in variable flying foxes (pteropus hypomelanus). | megachiropteran bats are biologically important both as endangered species and reservoirs for emerging human pathogens. reliable detection of antibodies to specific pathogens in bats is thus epidemiologically critical. eight variable flying foxes (pteropus hypomelanus) were immunized with 2,4-dinitrophenylated bovine serum albumin (dnp-bsa). each bat received monthly inoculations for 2 months. affinity-purified igg was used for production of polyclonal and monoclonal anti-variable flying fox igg ... | 2009 | 18242703 |
| experimental transmission of the parasitic flagellates trypanosoma cruzi and trypanosoma rangeli between triatomine bugs or mice and captive neotropical bats. | trypanosoma cruzi and trypanosoma rangeli-like trypanosomes have been found in a variety of neotropical bat species. in this study, bats (artibeus lituratus, carollia perspicillata, desmodus rotundus, glossophaga soricina, molossus molossus, phyllostomus hastatus) were maintained under controlled conditions, and experiments were conducted to determine how they might become infected naturally with trypanosomes. all bats were first screened for existing infections by hemoculture and the examinatio ... | 2007 | 17710299 |
| colony size, sex ratio and cohabitation in roosts of phyllostomus hastatus (pallas) (chiroptera: phyllostomidae). | phyllostomus hastatus bat is species broadly distributed over the neotropical region, which uses as diurnal roosts caves, hollow trees, palm leaves and human buildings. thirteen diurnal roosts of p. hastatus were analysed from 1990 to 2009 in several localities of rio de janeiro state, regarding environment (rural, urban or protected area), type of roost (hollow tree, basement or roof), sex ratio and cohabitation. a nocturnal roost was also analysed. sex ratio of p. hastatus varied considerably ... | 2010 | 21180912 |
| use of binaural cues for sound localization in two species of phyllostomidae: the greater spear-nosed bat (phyllostomus hastatus) and the short-tailed fruit bat (carollia perspicillata). | unlike humans, not all mammals use both of the binaural cues for sound localization. whether an animal uses these cues can be determined by testing its ability to localize pure tones; specifically, low frequencies are localized using time-difference cues, and high frequencies are localized using intensity-difference cues. we determined the ability to use binaural cues in 2 new world bats, phyllostomus hastatus, large omnivores, and carollia perspicillata, small frugivores, by testing their tone- ... | 2010 | 21090890 |
| trypanosoma cruzi (kinetoplastida, trypanosomatidae) genotypes in neotropical bats in brazil. | few studies have been conducted to investigate the role played by the order chiroptera in the sylvatic transmission cycle of trypanosoma cruzi or their putative association with the main genotypes of the parasite. here, the purpose was to enlarge the knowledge of this issue, in this sense, 93 specimens of bats included in 4 families, respectively molossidae, noctilionidae, phyllostomidae and vespertilionidae collected in distinct regions of brazil were submitted to fresh blood smears and hemocul ... | 2008 | 18650015 |
| cell surface analysis of trypanosomes of the subgenus schizotrypanum isolated from bats. | two stocks (m5, m29) of trypanosomes of the subgenus schizotrypanum were isolated from the bat phyllostomus hastatus and analyzed for cell electrophoretic mobility (epm) and lectin binding surface sites. epimastigotes from the m5 and m29 stocks presented a mean epm of around -0.57 and -0.56 microns. s-1.v-1.cm respectively. differences in the agglutination profiles were detected between epimastigotes or trypomastigotes from the two parasite populations using lectins with specificity for d-glcnac ... | 1996 | 8758552 |
| schizodeme and zymodeme analysis of trypanosomes of the subgenus schizotrypanum from the bat. | two stocks and nine clones of trypanosomes of the subgenus schizotrypanum were analyzed based on their electrophoretic pattern of ecor1 digestion products of kinetoplast dna (k-dna) minicircles (schizodeme) and isoenzymes (zymodeme). the trypanosome stocks were isolated from phyllostomus hastatus bats collected in different locations in minas gerais state, brazil. the k-dna pattern showed major variations between stocks and microvariations among the clones. furthermore, in one of several cloning ... | 1993 | 8415566 |
| concentration of carotenoids, retinol and alpha-tocopherol in plasma of six microchiroptera species. | to adequately feed species in captivity it is necessary to know their nutritional habits and their natural availability of specific nutrients. such essential nutrients are vitamin a, vitamin e and selected carotenoids as vitamin-a-precursors. because their blood plasma concentration are valid biomarkers of nutritional status of dietary intake, we determined the concentrations of carotenoids, retinol and alpha-tocopherol by hplc as well as the transport proteins for retinol, the retinol-binding p ... | 2007 | 17462932 |
| phylogenetic diversity of bat trypanosomes of subgenus schizotrypanum based on multilocus enzyme electrophoresis, random amplified polymorphic dna, and cytochrome b nucleotide sequence analyses. | trypanosome stocks isolated from bats (chiroptera) and belonging to the subgenus schizotrypanum were analyzed by multilocus enzyme electrophoresis (mlee) at 22 loci, random amplified polymorphic dna (rapd) with 14 primers and/or cytochrome b nucleotide sequence. bat trypanosomes belonged to the species trypanosoma cruzi marinkellei (10 stocks), trypanosoma dionisii (four stocks) and trypanosoma vespertilionis (three stocks). one t. rangeli stock and seven stocks of t. cruzi sensu stricto, the ag ... | 2003 | 12797982 |
| sound-localization acuity and its relation to vision in large and small fruit-eating bats: i. echolocating species, phyllostomus hastatus and carollia perspicillata. | passive sound-localization acuity for 100-ms noise bursts was determined behaviorally for two species of bats: phyllostomus hastatus, a large bat that eats fruit and vertebrates, and carollia perspicillata, a small species that eats fruit and nectar. the mean minimum audible angle for two p. hastatus was 9 degrees , and that for two c. perspicillata was 14.8 degrees . this places their passive sound-localization acuity near the middle of the range for mammals. sound localization varies widely am ... | 2007 | 17630232 |
| [wild reservoirs and vectors of trypanosoma cruzi. lvii=natural infection of phyllostomus hastatus hastatus (tallas, 1767) by t. cruzi]. | | 1974 | 4219637 |
| molecular phylogeny of the superorder archonta. | the superorder archonta has been hypothesized to include primates, tree shrews, bats, and flying lemurs as descendants of a common ancestor. more recently, a diphyletic origin for bats has been proposed. to evaluate these hypotheses, the nucleotide sequence of the mitochondrial cytochrome oxidase subunit ii gene was determined from a bushbaby (galago senegalensis), flying lemur (cynocephalus variegatus), tree shrew (tupaia glis), spear-nosed bat (phyllostomus hastatus), rousette bat (rousettus l ... | 1991 | 1658802 |
| lunarperiodic variation of the phase-angle difference in nocturnal animals under natural zeitgeber-conditions near the equator. | several months' studies under natural illumination conditions in the vicinity of the equator show that night monkeys (aotus trivirgatus), and leaf-nosed bats (artibeus lituratus) exhibit species-specific lunarperiodic changes of the phase position of their activity rhythm to the zeitgeber rhythm (figures 1-3). these changes are closely to nightly illumination conditions. in aotus the phase-angle differences (p.a.ds) of the onset and end of the activity phase, and in artibeus the p.a.ds of the mi ... | 1976 | 829232 |
| metabolism during flight in two species of bats, phyllostomus hastatus and pteropus gouldii. | the energetic cost of flight in a wind-tunnel was measured at various combinations of speed and flight angle from two species of bats whose body masses differ by almost an order of magnitude. the highest mean metabolic rate per unit body mass measured from p. hastatus (mean body mass, 0.093 kg) was 130.4 wkg-1, and that for p. gouldii (mean body mass, 0.78 kg) was 69.6 wkg-1. these highest metabolic rates, recorded from flying bats, are essentially the same as those predicted for flying birds of ... | 1975 | 1159367 |
| growth and differentiation on a trypanosome of the subgenus schizotrypanum from the bat phyllostomus hastatus. | the effects of temperature, ph, osmolarity and aeration on the growth and differentiation of a trypanosome of the subgenus schizotrypanum isolated from the bat phyllostomus hastatus were studied. in general, the growth characteristics of the flagellate were similar to those of trypanosoma (schizotrypanum) cruzi. however, the parasite did not growth at 33 or 37 c. increase in the osmolarity and aeration promoted growth at 33 c. significant metacyclogenesis was detected only in the growth conditio ... | 1993 | 8159823 |
| paternity and genetic heterogeneity in the polygynous bat, phyllostomus hastatus. | wild colonies of greater spearnose bats were marked, censused regularly, and genotyped at three polymorphic allozyme loci. while adult composition of social units is very stable and strong polygyny results in marked changes in gene frequencies between generations, dispersal of offspring is sufficient to prevent significant genetic heterogeneities between social units. kin selection cannot explain social cohesiveness in these highly social mammals. | 1977 | 17770506 |
| non-kin cooperation in bats. | many bats are extremely social. in some cases, individuals remain together for years or even decades and engage in mutually beneficial behaviours among non-related individuals. here, we summarize ways in which unrelated bats cooperate while roosting, foraging, feeding or caring for offspring. for each situation, we ask if cooperation involves an investment, and if so, what mechanisms might ensure a return. while some cooperative outcomes are likely a by-product of selfish behaviour as they are i ... | 2016 | 26729934 |
| karyotype, evolution and phylogenetic reconstruction in micronycterinae bats with implications for the ancestral karyotype of phyllostomidae. | the micronycterinae form a subfamily of leaf-nosed bats (phyllostomidae) that contains the genera lampronycteris sanborn, 1949, and micronycteris gray, 1866 (stricto sensu), and is characterized by marked karyotypic variability and discrepancies in the phylogenetic relationships suggested by the molecular versus morphological data. in the present study, we investigated the chromosomal evolution of the micronycterinae using classical cytogenetics and multidirectional chromosome painting with whol ... | 2019 | 31064342 |
| two new cytotypes reinforce that micronycteris hirsuta peters, 1869 does not represent a monotypic taxon. | the genus micronycteris is a diverse group of phyllostomid bats currently comprising 11 species, with diploid number (2n) ranging from 26 to 40 chromosomes. the karyotypic relationships within micronycteris and between micronycteris and other phyllostomids remain poorly understood. the karyotype of micronycteris hirsuta is of particular interest: three different diploid numbers were reported for this species in south and central americas with 2n = 26, 28 and 30 chromosomes. although current evid ... | 2013 | 24359225 |
| chromosomal phylogeny of vampyressine bats (chiroptera, phyllostomidae) with description of two new sex chromosome systems. | the subtribe vampyressina (sensu baker et al. 2003) encompasses approximately 43 species and seven genera and is a recent and diversified group of new world leaf-nosed bats specialized in fruit eating. the systematics of this group continues to be debated mainly because of the lack of congruence between topologies generated by molecular and morphological data. we analyzed seven species of all genera of vampyressine bats by multidirectional chromosome painting, using whole-chromosome-painting pro ... | 2016 | 27260645 |
| 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 mea ... | 2018 | 29222666 |
| echolocation in bats: signal processing of echoes for target range. | echolocating bats eptesicus fuscus and phyllostomus hastatus can discriminate between the nearer and farther of two targets. their errors in discrimination are predicted accurately by the autocorrelation functions of their sonar cries. these bats behave as though they have an ideal sonar system which cross correlates the transmitted cry with the returning echo to extract targetrange information. | 1971 | 5541661 |
| hearing in american leaf-nosed bats. i: phyllostomus hastatus. | we determined the audiogram of phyllostomus hastatus (the greater spear-nosed bat), a large, omnivorous american leaf-nosed bat native to central and south america. a conditioned suppression/avoidance procedure with a fruit juice reward was used for testing. at an intensity of 60 db sound pressure level (spl re 20 micron/m(2)), the hearing range of p. hastatus extends from 1.8 to 105 khz, with a best sensitivity of 1 db spl at 20 khz. both its high-frequency and low-frequency hearing are not unu ... | 2002 | 12204353 |
| greater spear-nosed bats discriminate group mates by vocalizations. | individuals often benefit from identifying their prospective social partners. some species that live in stable social groups discriminate between their group mates and others, basing this distinction on calls that differ among individuals. vocalizations that differ between social groups are much less common, and few studies have demonstrated that animals use group-distinctive calls to identify group mates. female greater spear-nosed bats, phyllostomus hastatus, live in stable groups of unrelated ... | 1998 | 9642014 |
| vocal learning by greater spear-nosed bats. | vocal learning is well known among passerine and psittacine birds, but most data on mammals are equivocal. specific benefits of vocal learning are poorly understood for most species. one case where vocal learning should be favoured by selection is where calls indicate group membership and group mates are unrelated. female greater spear-nosed bats, phyllostomus hastatus, live in stable groups of unrelated bats and use loud, broadband calls to coordinate foraging movements of social group mates. b ... | 1998 | 9493408 |
| social calls coordinate foraging in greater spear-nosed bats | the function of social calls emitted by foraging bats has received little study. here we use observations of free-ranging greater spear-nosed bats, phyllostomus hastatus, and field playbacks to determine whether audible, broad-band 'screech' calls attract mates, warn conspecifics or influence access to food. five lines of evidence suggest that screech calls enable adult females from the same roosting group to fly together from the day roost to feeding sites. (1) seasonal differences in diet infl ... | 1998 | 9480702 |
| milk composition and lactational output in the greater spear-nosed bat, phyllostomus hastatus. | growth rates of mammalian young are closely linked to the ability of the mother to provide nutrients; thus, milk composition and yield provide a direct measure of maternal investment during lactation in many mammals. we studied changes in milk composition and output throughout lactation in a free-ranging population of the omnivorous bat, phyllostomus hastatus. fat and dry matter of milk increased from 9 to 21% and from 21 to 35% of wet mass, respectively, throughout lactation. energy increased f ... | 1997 | 9265749 |
| a morphometric study of the lungs of different sized bats: correlations between structure and function of the chiropteran lung. | 1. the lungs of four species of bats, phyllostomus hastatus (ph, mean body mass, 98 g), pteropus lylei (pl, 456 g), pteropus alecto (pa, 667 g), and pteropus poliocephalus (pp, 928 g) were analysed by morphometric methods. these data increase fivefold the range of body masses for which bat lung data are available, and allow more representative allometric equations to be formulated for bats. 2. lung volume ranged from 4.9 cm3 for ph to 39 cm3 for pp. the volume density of the lung parenchyma (i.e ... | 1991 | 1682957 |
| influence of air temperature on ventilation rates and thermoregulation of a flying bat. | to assess the involvement of the ventilatory system in thermoregulation during flight, breathing frequencies and tidal volumes were measured from three phyllostomus hastatus undertaking steady wind tunnel flights at a constant speed over a range of air temperatures (ta) from 17.7 to 31.1 degrees c. mean breathing frequency was independent of ta, and tidal volume increased only modestly with increasing ta. consequently, minute ventilation rate increased insignificantly over the range of ta values ... | 1991 | 2035709 |
| operant conditioning in the bat phyllostomus hastatus. | bats of the species phyllostomus hastatus were trained to press a pigeon key with food as the reinforcer. patterns of responding under fixed-ratio, fixed-interval, and variable-interval schedules of reinforcement were similar to those typically shown by other species. in a simple auditory discrimination, responding readily came under stimulus control. it is suggested that the behavioral method could be applied to various problem areas of bat behavior. | 1971 | 5121858 |
| the homing ability of the neotropical bat phyllostomus hastatus, with evidence for visual orientation. | | 1966 | 5972806 |
| discrimination of infant isolation calls by female greater spear-nosed bats, phyllostomus hastatus. | in colonial species, recognition of offspring should be under strong selection. for accurate identification to occur offspring must emit individually distinctive signals and parents must be able to discriminate between signals. female greater spear-nosed bats (phyllostomus hastatus) roost in stable social groups and use infant vocalizations, termed isolation calls, to locate and identify their young. in this study, we investigate both the production and perception of isolation calls in p. hastat ... | 0 | 18311319 |
| reinforcement of the larynx and trachea in echolocating and non-echolocating bats. | the synchronization of flight mechanics with respiration and echolocation call emission by bats, while economizing these behaviors, presumably puts compressive loads on the cartilaginous rings that hold open the respiratory tract. previous work has shown that during postnatal development of artibeus jamaicensis (phyllostomidae), the onset of adult echolocation call emission rate coincides with calcification of the larynx, and the development of flight coincides with tracheal ring calcification. ... | 2020 | 32319086 |
| redescription of brennanacarus annereauxi (trombidiformes: trombiculidae) with new records for uruguay. | brennanacarus annereauxi (brennan and yunker, 1969) was described from venezuela parasitizing the greater spear-nosed bat. the monotypic genus brennanacarus goff, yunker and wheeler, 1987 is a replacement name for nasicola brennan and yunker, 1969, which was preoccupied by nasicola yamaguti, 1968. here, we redescribe the genus brennanacarus and the type species b. annereauxi. also, this is the first record of this species, as well as the second record of any chigger, for uruguay. | 2020 | 32869055 |
| hantavirus antibodies among phyllostomid bats from the arc of deforestation in southern amazonia, brazil. | in order to determine whether southern amazonian bats could harbour hantaviruses we, serologically and molecularly, screened blood, saliva, excreta and organ tissues of 47 bats captured from september to december 2015. we found that only phyllostomid bats presented antibodies against hantavirus. the seropositive bats belonged to two species of phyllostomid bats: the greater spear-nosed bat phyllostomus hastatus (omnivorous) and the gnome fruit-eating bat dermanura gnoma. the overall seroprevalen ... | 2020 | 31793244 |
| cytoarchitecture of the superior olivary complex of three neotropical species of bats (noctilio leporinus, phyllostomus hastatus and carollia perspicillata) with different foraging behavior. | the understanding of the echolocation by studying different auditory nuclei of echolocating bats can be an important link in elucidating questions arising in relation to their foraging behavior. the superior olivary complex (soc) is the primary center for processing the binaural cues used in sound localization since echo locating bats rely on acoustic cues to navigate and capture prey while in flight. the present study was taken to test the hypothesis that the soc of echolocating neotropical bat ... | 2020 | 31090816 |
| male scent gland signals mating status in greater spear-nosed bats, phyllostomus hastatus. | chemical signals are ubiquitous, but often overlooked as potentially important for conveying information relevant for sexual selection. the male greater spear-nosed bat, phyllostomus hastatus, possesses a sexually dimorphic gland on the chest that produces an odoriferous secretion. here, we investigate the potential for this glandular secretion to act as a sexually selected olfactory signal by examining gland activity in and out of the mating season and determining if variation in its chemical c ... | 2018 | 30078062 |
| chromosomal evolution and phylogeny in the nullicauda group (chiroptera, phyllostomidae): evidence from multidirectional chromosome painting. | the family phyllostomidae (chiroptera) shows wide morphological, molecular and cytogenetic variation; many disagreements regarding its phylogeny and taxonomy remains to be resolved. in this study, we use chromosome painting with whole chromosome probes from the phyllostomidae phyllostomus hastatus and carollia brevicauda to determine the rearrangements among several genera of the nullicauda group (subfamilies gliphonycterinae, carolliinae, rhinophyllinae and stenodermatinae). | 2018 | 29699485 |
| reciprocal chromosome painting between two south american bats: carollia brevicauda and phyllostomus hastatus (phyllostomidae, chiroptera). | the neotropical phyllostomidae family is the third largest in the order chiroptera, with 56 genera and 140 species. most researchers accept this family as monophyletic but its species are anatomically diverse and complex, leading to disagreement on its systematics and evolutionary relationships. most of the genera of phyllostomidae have highly conserved karyotypes but with intense intergeneric variability, which makes any comparative analysis using classical banding difficult. the use of chromos ... | 2005 | 15973499 |
| chromosomal homologies among vampire bats revealed by chromosome painting (phyllostomidae, chiroptera). | substantial effort has been made to elucidate karyotypic evolution of phyllostomid bats, mostly through comparisons of g-banding patterns. however, due to the limited number of g-bands in respective karyotypes and to the similarity of non-homologous bands, an accurate evolutionary history of chromosome segments remains questionable. this is the case for vampire bats (desmodontinae). despite several proposed homologies, banding data have not yet provided a detailed understanding of the chromosoma ... | 2011 | 21178354 |
| bats are unusually insensitive to brief low-frequency tones. | bats use brief calls for echolocation, suggesting that they might be more sensitive to brief sounds than non-echolocating mammals. to investigate this possibility, absolute thresholds for brief tones were determined for four species of bats: the common vampire bat (desmodus rotundus) and the greater spear-nosed bat (phyllostomus hastatus), both of which use frequency-modulated calls, the egyptian fruit bat (rousettus aegyptiacus), an echolocator that uses tongue-clicks rather than laryngeal call ... | 2019 | 31147738 |
| a new species of parichoronyssus (acari: dermanyssoidea: macronyssidae) from bats of the genus phyllostomus (chiroptera: phyllostomidae) in peru and venezuela, with keys to the species of parichoronyssus. | parichoronyssus bakeri new species was found on two phyllostomid bats species, the greater spear-nosed bat, phyllostomus hastatus (pallas), and the lesser spear-nosed bat, phyllostomus elongatus (e. geoffroy), in pakitza, national park manu, madre de dios, peru, including additional material examined from venezuela. the female, male, deutonymph, and protonymph are described and illustrated. a key to the seven species of parichoronyssus is provided. | 2007 | 17294915 |
| trichobius longipes (diptera, streblidae) as a parasite of phyllostomus hastatus (chiroptera, phyllostomidae). | 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 on ... | 2016 | 25271450 |
| auditory sensitivity and frequency selectivity in greater spear-nosed bats suggest specializations for acoustic communication. | we investigated the relationship between auditory sensitivity, frequency selectivity, and the vocal repertoire of greater spear-nosed bats ( phyllostomus hastatus). p. hastatus commonly emit three types of vocalizations: group-specific foraging calls that range from 6 to 11 khz, low amplitude echolocation calls that sweep from 80 to 40 khz, and infant isolation calls from 15 to 100 khz. to determine if hearing in p. hastatus is differentially sensitive or selective to frequencies in these calls, ... | 2004 | 14727133 |
| cytoarchitecture of the medial nucleus of trapezoid body of three neotropical species of bats (noctilio leporinus, phyllostomus hastatus, and carollia perspicillata) with different foraging behavior. | the present study was taken to test the hypothesis that the medial nucleus of the trapezoid body (mntb) of echolocating neotropical bats with different foraging behavior will exhibit morphological variations in relative size, degree of complexity and spatial distribution. the brains were collected from six male adult bats of each species: noctilio leporinus (fish-eating), phyllostomus hastatus (carnivorous/ omnivorous) and carollia perspicillata (fruit-eating) and were double-embedded and transv ... | 2020 | 33084736 |
| karyotypic variation in rhinophylla pumilio peters, 1865 and comparative analysis with representatives of two subfamilies of phyllostomidae (chiroptera). | the family phyllostomidae belongs to the most abundant and diverse group of bats in the neotropics with more morphological traits variation at the family level than any other group within mammals. in this work, we present data of chromosome banding (g, c and ag-nor) and fluorescence in situ hybridization (fish) for representatives of rhinophylla pumilio peters, 1865 collected in four states of brazil (amazonas, bahia, mato grosso and pará). two karyomorphs were found in this species: 2n=34, fn=6 ... | 2012 | 24260663 |
| phylogenetic reconstruction by cross-species chromosome painting and g-banding in four species of phyllostomini tribe (chiroptera, phyllostomidae) in the brazilian amazon: an independent evidence for monophyly. | the subfamily phyllostominae comprises taxa with a variety of feeding strategies. from the cytogenetic point of view, phyllostominae shows different rates of chromosomal evolution between genera, with phyllostomus hastatus probably retaining the ancestral karyotype for the subfamily. since chromosomal rearrangements occur rarely in the genome and have great value as phylogenetic markers and in taxonomic characterization, we analyzed three species: lophostoma silvicola (lsi), phyllostomus discolo ... | 2015 | 25806812 |
| sunset-related timing of flight activity in neotropical bats. | the times of onset and completion of the hunting flights of three colonies of neotropical bats, each comprising 100-200 individuals, were observed for nine months. the colonies were of different species: molossus ater (m.a.) and molossus molossus (m.m.) of the molossidae, and myotis nigricans (my. n.) of the vespertilionidae. individuals of phyllostomus hastatus (p.h., phyllostomidae) were also observed. all the bats roosted in a building near restrepo, colombia (4°16'n, 73°34'w). times of emerg ... | 1978 | 28309285 |