Publications

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distribution of lines and other repetitive elements in the karyotype of the bat carollia: implications for x-chromosome inactivation.the lyon repeat hypothesis postulates that long interspersed elements (lines) play a role in x-chromosome inactivation. evidence to support this hypothesis includes the observation that the degree of inactivation of autosomes translocated to the x chromosome is correlated with line density on that autosome. we examined the distribution of lines in the fruit bat carollia brevicauda, which has an autosomal translocation to the x that occurred at least 7 million years ago. a quantitative analysis o ...200212438798
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 ...200515973499
field metabolic rates of phytophagous bats: do pollination strategies of plants make life of nectar-feeders spin faster?recently, it was argued that extrinsic factors, such as high foraging costs, lead to elevated field metabolic rates (fmr). we tested this suggestion by comparing the fmr of nectar-feeding and fruit-eating bats. we hypothesized that the foraging effort per energy reward is higher for nectar-feeding mammals than for fruit-eating mammals, since energy rewards at flowering plants are smaller than those at fruiting plants. using the doubly labelled water method, we measured the fmr of nectar-feeding ...200616283331
dengue virus in mexican bats.individuals belonging to five families, 12 genera, and 19 different species of bats from dengue endemic areas in the gulf and pacific coasts of mexico were examined by elisa, rt-pcr, and for the presence of dengue virus (dv) ns1 protein. nine individuals from four species were seropositive by elisa: three insectivorous, myotis nigricans (four positives/12 examined), pteronotus parnellii (3/19), and natalus stramineus (1/4), and one frugivorous artibeus jamaicensis (1/35) (12.86% seroprevalence i ...200818325131
neo-xy body: an analysis of xy1y2 meiotic behavior in carollia (chiroptera, phyllostomidae) by chromosome painting.classical and molecular cytogenetic analyses of mitotic and meiotic cells were performed on two species of carollia from the family phyllostomidae (chiroptera), which have an xx/xy(1)y(2) sex determination system. our results show that the species carollia perspicillata and carollia brevicauda have the same xq-autosome translocation (neo-x). using multicolor fish we observed different levels of condensation of the original x and y chromosomes when compared to the translocated autosomal segment, ...200919372667
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 ...201020635197
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 ...201121178354
morphological variation in the short-tailed fruit bat (carollia) in ecuador, with comments on the practical and philosophical aspects of boundaries among species.the mechanisms for the morphological delimitation of species in carollia remain poorly understood. this is the first study to assess variation in size and shape from strictly geometric terms. both factors are assessed by statistical perspectives of distribution, overlap and relative distances. despite its overlap, the size of the skull seems to be the most influential character for the discrimination of species, with shape playing a much smaller role. the smallest species seems to be the most di ...201021392341
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 ...201323775139
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 ...201324359225
landscape ecology of trypanosoma cruzi in the southern yucatan peninsula.landscape interactions of trypanosoma cruzi (tc) with triatoma dimidiata (td) depend on the presence and relative abundance of mammal hosts. this study analyzed a landscape adjacent to the calakmul biosphere reserve, composed of conserved areas, crop and farming areas, and the human community of zoh laguna with reported chagas disease cases. sylvatic mammals of the chiroptera, rodentia, and marsupialia orders were captured, and livestock and pets were sampled along with t. dimidiata in all habit ...201526219998
cranial and mandibular shape variation in the genus carollia (mammalia: chiroptera) from colombia: biogeographic patterns and morphological modularity.neotropical bats of the genus carollia are widely studied due to their abundance, distribution and relevance for ecosystems. however, the ecomorphological boundaries of these species are poorly differentiated, and consequently correspondence between their geographic distribution, ecological plasticity and morphological variation remains unclear. in this study, patterns of cranial and mandibular morphological variation were assessed for carollia brevicauda, c. castanea and c. perspicillata from c ...201526413433
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 ...201627260645
sources of assimilated protein in five species of new world frugivorous bats.fruits are n-poor items and their availability in the tropics varies throughout the year. field and experimental studies debate whether frugivorous bats have to switch to n-rich sources of food during part of the year or if they are able to subsist on a fruit-only diet. different strategies to meet their n requirements may influence the way in which frugivorous bats partition food resources allowing the coexistence of numerous species in tropical communities. we examined the extent to which five ...200228466224
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