Publications

a comparative study of lymph node mast cell populations in five marsupial species.	in order to determine whether different subpopulations of mast cells exist, mast cells of mandibular and axillary lymph nodes from five species (didelphis aurita, metachirus nudicaudatus, philander opossum, marmosops incanus and gracilinanus agilis) of south american marsupials were studied. our results showed that mast cells present in the connective tissue of the capsule and septa (ctmc) were similar to those described for eutherian mammals. however, a population of mast cells that was present ...	1999	10481303
ecology and host specificity of laelapine mites (acari: laelapidae) of small mammals in an atlantic forest area of brazil.	mesostigmatic mites of the laelapinae berlese, 1892 (acari: laelapidae) are nidicolous arthropods that commonly occur in the fur of neotropical small mammmals. in this 2-yr study, the laelapine acarofauna associated with the small mammal community in an area of atlantic forest on ilha grande, rio de janeiro state, was examined, including observations on patterns of host specificity, mite dispersal, ecology, and food habits. a total of 1,347 laelapines was sampled from the pelage of 6 species of ...	2002	12053977
androlaelaps marmosops (acari: laelapidae), a new species associated with the mouse opossum, marmosops incanus (lund, 1840) in the atlantic forest of rio de janeiro state, brazil.	androlaelaps marmosops, a new species of laelapid mite, is described from the pelage of the mouse opossum, marmosops incanus (lund, 1840) (mammalia: didelphidae), in two areas of atlantic forest of rio de janeiro state. measurements and illustrations are included for females only.	2002	12071326
mapping the distribution of the interstitial telomeric (ttaggg)n sequences in eight species of brazilian marsupials (didelphidae) by fish and the correlation with constitutive heterochromatin. do its represent evidence for fusion events in american marsupials?	the c-band pattern and the distribution of the (ttaggg)(n) sequence after fluorescence in situ hybridization (fish), were studied in eight species of didelphidae marsupials: four species with 2n = 14 (marmosops parvidens, marmosops incanus, marmosa murina and metachirus nudicaudatus), two species with 2n = 18 (monodelphis domestica and m. americana), and two with 2n = 22 (didelphis marsupialis and lutreolina crassicaudata). the hybridization signals were observed at both termini telomeres of all ...	2002	12826754
host-ectoparasite specificity in a small mammal community in an area of atlantic rain forest (ilha grande, state of rio de janeiro), southeastern brazil.	the analyses of the ectoparasite species associated with a small mammal community on ilha grande, a coastal island in southern of the state of rio de janeiro, brazil, evaluated the level of host-ectoparasite specificity. was used the jaccard index for qualitative data to analyse the similarity. the lowest value of similarity occurred between proechimys iheringi and marmosops incanus and between sciurus aestuans and nectomys squamipes (cj=0.08) and the highest between p. iheringi and oxymycterus ...	2003	14595458
karyotype composition of some rodents and marsupials from chapada diamantina (bahia, brasil).	the chapada diamantina (cd) is located in bahia state, between 11-14 degrees s and 41-43 degrees w, being part of the serra do espinhaço. the occurrence of different habitats and transition areas permits an interesting mammal fauna composition, with species from different biomes living in sympatry. species of didelphimorphia and rodentia are important members of mammal communities in almost all different habitats, and morphological and cytogenetic characters are important for a correct identific ...	2007	18094834
selection, diversity and evolutionary patterns of the mhc class ii dab in free-ranging neotropical marsupials.	research on the genetic architecture and diversity of the mhc has focused mainly on eutherian mammals, birds and fish. so far, studies on model marsupials used in laboratory investigations indicated very little or even no variation in mhc class ii genes. however, natural levels of diversity and selection are unknown in marsupials as studies on wild populations are virtually absent. we used two endemic south american mouse opossums, gracilinanus microtarsus and marmosops incanus, to investigate c ...	2008	18534008
small mammals in a fragment and adjacent matrix in southeastern brazil.	between may 2002 and may 2003, we studied a small mammal community from an atlantic forest fragment surrounded by a coffee plantation in the municipality of santa teresa, espírito santo state, brazil. we obtained a total of 300 captures of 114 individuals belonging to 11 mammal species. seventy three percent of the species captured in the forest also used the coffee plantation, mainly males (90%) and young (80%) individuals of marmosops incanus. the exceptionally low recapture rate in the coffee ...	2009	19675931
permanent genetic resources added to molecular ecology resources database 1 may 2009-31 july 2009.	this article documents the addition of 512 microsatellite marker loci and nine pairs of single nucleotide polymorphism (snp) sequencing primers to the molecular ecology resources database. loci were developed for the following species: alcippe morrisonia morrisonia, bashania fangiana, bashania fargesii, chaetodon vagabundus, colletes floralis, coluber constrictor flaviventris, coptotermes gestroi, crotophaga major, cyprinella lutrensis, danaus plexippus, fagus grandifolia, falco tinnunculus, fle ...	2009	21564933
Immigration rates in fragmented landscapes - empirical evidence for the importance of habitat amount for species persistence.	The total amount of native vegetation is an important property of fragmented landscapes and is known to exert a strong influence on population and metapopulation dynamics. As the relationship between habitat loss and local patch and gap characteristics is strongly non-linear, theoretical models predict that immigration rates should decrease dramatically at low levels of remaining native vegetation cover, leading to patch-area effects and the existence of species extinction thresholds across frag ...	2011	22125643
a small mammal community in a forest fragment, vegetation corridor and coffee matrix system in the brazilian atlantic forest.	the objective of our work was to verify the value of the vegetation corridor in the conservation of small mammals in fragmented tropical landscapes, using a model system in the southeastern minas gerais. we evaluated and compared the composition and structure of small mammals in a vegetation corridor, forest fragments and a coffee matrix. a total of 15 species were recorded, and the highest species richness was observed in the vegetation corridor (13 species), followed by the forest fragments (1 ...	2011	21912591
first evidence of gregarious denning in opossums (didelphimorphia, didelphidae), with notes on their social behaviour.	the didelphidae are considered solitary opossums with few social interactions, usually limited to mating-related or mother-pouch young interactions. anecdotal reports suggest that additional interactions occur, including den sharing by a few individuals, usually siblings. here, we report novel observations that indicate opossums are more social than previously thought. these include nest sharing by males and females of marmosa paraguayana, gracilinanus microtarsus and marmosops incanus prior to ...	2015	26085500
detection of leishmania spp in silvatic mammals and isolation of leishmania (viannia) braziliensis from rattus rattus in an endemic area for leishmaniasis in minas gerais state, brazil.	knowledge of potential reservoirs of leishmania spp. in an anthropic environment is important so that surveillance and control measures can be implemented. the aim of this study was to investigate the infection by leishmania in small mammals in an area located in minas gerais, brazil, that undergoes changes in its natural environment and presents autochthonous human cases of cutaneous leishmaniasis (cl) and visceral leishmaniasis (vl). for the capture of the animals, sherman and tomahawk traps w ...	2017	29176902
survey of anti-toxoplasma gondii antibodies in wild mammals captured from atlantic forest fragments in bahia, northeastern brazil.	the objective of this study was to investigate the frequency of antibodies to toxoplasma gondii present in wild mammals that were trap captured in forest fragments in the state of bahia, northeastern brazil. a total of 368 individuals (246 rodents, 104 marsupials and 18 bats) were captured using live catch traps. serum samples were tested using the modified agglutination test, with a cut-off point at 1:25 dilution. the total occurrence of antibodies to t. gondii was 10.6% (39/368), being 16.3% ( ...	2020	33111842