| small mammal populations of an agroecosystem in the atlantic forest domain, southeastern brazil. | this study reports 2 years of the population dynamics and reproduction of a small mammal community using the removal method. the study was conducted in a rural area of the atlantic forest, in sumidouro, rio de janeiro state, brazil. the population sizes, age structure and reproduction were studied for the four most common species in the study area. the overall diversity was 1.67 and ranged between 0.8 to 1.67. the species richness was 13 considering the whole study. the most abundant species wer ... | 2007 | 17505767 |
| habitat associations of small mammals in southern brazil and use of regurgitated pellets of birds of prey for inventorying a local fauna. | we inventoried terrestrial small mammals in an agricultural area in southern brazil by using trapping and prey consumed by barn owls (tyto alba) and white-tailed kites (elanus leucurus). small mammals were trapped in three habitat types: corn fields, uncultivated fields ("capoeiras"), and native forest fragments. a total of 1,975 small mammal specimens were trapped, another 2,062 identified from the diet of barn owls, and 2,066 from the diet of white-tailed kites. both trapping and prey in the p ... | 2007 | 18278312 |
| genetic characterization of hantaviruses associated with sigmodontine rodents in an endemic area for hantavirus pulmonary syndrome in southern brazil. | an ecological assessment of reservoir species was conducted in a rural area (jaborá) in the mid-west of the state of santa catarina in southern brazil, where hantavirus pulmonary syndrome is endemic, to evaluate the prevalence of hantavirus infection in wild rodents. blood and tissue samples were collected from 507 rodents during seven field trips from march 2004 to april 2006. some of the animals were karyotyped to confirm morphological identification. phylogenetic reconstructions of rodent spe ... | 2010 | 21138380 |
| permanent genetic resources added to molecular ecology resources database 1 april 2010 - 31 may 2010. | this article documents the addition of 396 microsatellite marker loci to the molecular ecology resources database. loci were developed for the following species: anthocidaris crassispina, aphis glycines, argyrosomus regius, astrocaryum sciophilum, dasypus novemcinctus, delomys sublineatus, dermatemys mawii, fundulus heteroclitus, homalaspis plana, jumellea rossii, khaya senegalensis, mugil cephalus, neoceratitis cyanescens, phalacrocorax aristotelis, phytophthora infestans, piper cordulatum, pte ... | 2010 | 21565124 |
| ecological study of hantavirus infection in wild rodents in an endemic area in brazil. | a 3-year ecological study of small mammals was carried out in an endemic area for hantavirus pulmonary syndrome in the state of santa catarina in southern brazil. a total of 994 rodents of 14 different species corresponding to the subfamilies of sigmodontinae, murinae, eumysopinae, and caviinae were captured during 2004-2006. oligoryzomys nigripes and akodon montensis were the most abundant species and showed a clear seasonal pattern with higher population sizes during the winter. rodent populat ... | 2014 | 24291677 |
| paracoccidioides brasiliensis infection in small wild mammals. | paracoccidioidomycosis (pcm) is a systemic mycosis prevalent in brazil and other latin american countries. the etiological agents of pcm are the thermo-dimorphic fungi paracoccidioides brasiliensis and p. lutzii. taking into account that the natural habitat of paracoccidioides spp. is still undefined, domestic and wild animals could be useful as indicators of paracoccidioides spp. presence in endemic areas. the objective of this study was to evaluate the infection of small wild mammals by p. bra ... | 2015 | 26232125 |
| microhabitat of small mammals at ground and understorey levels in a deciduous, southern atlantic forest. | each animal species selects specific microhabitats for protection, foraging, or micro-climate. to understand the distribution patterns of small mammals on the ground and in the understorey, we investigated the use of microhabitats by small mammals in a deciduous forest of southern brazil. ten trap stations with seven capture points were used to sample the following microhabitats: liana, fallen log, ground litter, terrestrial ferns, simple-trunk tree, forked tree, and piper sp. shrubs. seven fiel ... | 2013 | 23828340 |
| the genus guerrerostrongylus (nematoda: heligmonellidae) in cricetid rodents from the atlantic rain forest of misiones, argentina: emended description of guerrerostrongylus zetta (travassos, 1937) and description of a new species. | two species of guerrerostrongylus sutton and durette-desset, 1991, are reported in cricetid rodents from the atlantic rain forest of misiones, argentina. guerrerostrongylus zetta (travassos, 1937) is redescribed on the basis of material collected from oligoryzomys nigripes from argentina and material loaned by chioc from brazil. it is characterized by a synlophe with about 40-45 (35-48) well-developed cuticular ridges, caudal bursa with long rays 6 and dorsal ray divided at mid-length, and well- ... | 2012 | 22494032 |
| description of the helminth communities of sympatric rodents (muroidea: cricetidae) from the atlantic forest in northeastern argentina. | taxonomic and ecological aspects of the helminths found in the assemblage of sigmodontine rodents (cricetidae-muroidea) of the atlantic forest in argentina are studied in this paper. the following species akodon montensis, brucepattersonius sp. and thaptomys nigrita (tribe akodontini), as well as, euryoryzomys russatus, nectomys squamipes, oligoryzomys nigripes, and sooretamys angouya (tribe oryzomyini) are analyzed. a complete taxonomic list with a total of 25 species of helminths, including di ... | 2017 | 29242441 |
| vaccinia virus in feces and urine of wild rodents from são paulo state, brazil. | the origin of vaccinia virus (vacv) outbreaks in brazil remains unknown, but since the isolation of vacv in mus musculus mice during a zoonotic outbreak affecting cattle and milkers, peridomestic rodents have been suggested to be a link between cows and wild animals. considering that experimentally infected mice eliminate viral particles in their feces, we investigated the presence of vacv in the feces and urine of wild rodents that were captured in the forest areas surrounding milking farms in ... | 2018 | 29360742 |
| a new species of syphacia (seuratoxyuris) (nematoda: oxyuridae) from sooretamys angouya fischer, 1814 (rodentia: cricetidae) in argentina. | syphacia (seuratoxyuris) hugoti n. sp. (nematoda: oxyuridae) is described from the cecum of sooretamys angouya (cricetidae: sigmodontinae: oryzomyini) captured in formosa province, argentina. the diagnosis of the subgenus is emended, and the new species is separated from eight congeners by the distribution of submedian papillae and amphids, shape of the cephalic plate, presence of deirids, absence of cervical and lateral alae, length of the spicule, structure of the accessory hook of the guberna ... | 2014 | 24995650 |
| description of litomosoides ysoguazu n. sp. (nematoda, onchocercidae), a parasite of the tuft-toed rice rat sooretamys angouya (fischer) (rodentia: cricetidae), and a first record of l. esslingeri bain, petit & berteaux, 1989 in paraguay. | paraguay is a small landlocked country whose mammalian fauna is among the least studied in south america, as well as their parasites. as a result of a study of the effects of habitat fragmentation on small mammal biodiversity in eastern paraguay, we have collected some parasites of cricetid rodents. herein, we describe a new species of litomosoides chandler, 1931 parasitising the body cavity of the tuft-toed rice rat sooretamys angouya (fischer) and litomosoides esslingeri bain, petit & diagne, ... | 2015 | 25962465 |
| geographic patterns of genetic variation and conservation consequences in three south american rodents. | in this study, the geographic patterns of genetic variation of three rodent species belonging to the tribe oryzomyini were investigated using the mitochondrial cytochrome b and nuclear irbp genes in biomes that are undergoing degradation processes to a greater or lesser degree. the samples are from 25 collecting localities distributed throughout the amazon, cerrado, atlantic forest, and pampa biomes. the results show that the three species have a population and geographic structure, besides bein ... | 2007 | 17939030 |
| on the origin and evolution of the extant system of b chromosomes in oryzomyini radiation (rodentia, sigmodontinae). | heterogeneous supernumerary chromosomes (bs) are recognized in the oryzomyines holochilus brasiliensis, nectomys rattus, n. squamipes, oligoryzomys flavescens and sooretamys angouya, representing about 10% of all known b-containing rodent species. they provide an outstanding model for understanding the origin, evolution and diversity of bs in a phylogenetic context. therefore, whole chromosome-specific probes were generated from flow-sorted holochilus brasiliensis (hbr) autosomes 11 and 25+26 an ... | 2015 | 26305702 |
| amblyomma yucumense n. sp. (acari: ixodidae), a parasite of wild mammals in southern brazil. | during 2013-2014, adult ticks were collected on the vegetation and subadult ticks were collected from small mammals [didelphis aurita wied-neuwied, sooretamys angouya (fischer), euryoryzomys russatus (wagner), akodon montensis thomas, oxymycterus judex thomas] in an atlantic rainforest reserve in southern brazil. analyses of the external morphology of the adult ticks revealed that they represent a new species, amblyomma yucumense n. sp. partial 16s rrna sequences generated from males, females, a ... | 2015 | 26336277 |
| b chromosomes in brazilian rodents. | b chromosomes are now known in eight brazilian rodent species: akodon montensis, holochilus brasiliensis, nectomys rattus, n. squamipes, oligoryzomys flavescens, oryzomys angouya, proechimys sp. 2 and trinomys iheringi. typically these chromosomes are heterogeneous relative to size, morphology, banding patterns, presence/absence of nors, and presence/absence of interstitial telomeric signals after fish. in most cases, bs are heterochromatic and late replicating. active nors were detected in two ... | 2004 | 15292600 |
| [identification of wild rodents as hosts of angiostrongylus costaricencis in southern brazil]. | increasing number of human cases of abdominal angiostrongyliasis has been diagnosed in the south of brazil. the main definitive host of angiostrongylus costaricensis in central america is the cotton rat (sigmodon hispidus) that does not occur in south america, except in the north of colombia, peru and venezuela. rodents were captured in the endemic area in rio grande do sul (rs) and definitive hosts were identified for the first time in brazil: oryzomys nigripes and oryzomys ratticeps. o. nigrip ... | 1990 | 2135366 |