| rickettsial infection in ticks infesting wild birds from two eco-regions of argentina. | several tick-borne rickettsia species are recognized human pathogens in argentina. here we evaluated rickettsial infection in ticks collected on passerine birds during 2011-2012 in two eco-regions of argentina. the ticks were processed by molecular analysis through polymerase chain reaction (pcr) detection and dna sequencing of fragments of two rickettsial genes, glta and ompa. a total of 594 tick specimens (532 larvae and 62 nymphs), representing at least 4 species (amblyomma tigrinum, ixodes p ... | 2016 | 27580393 |
| sex determination in turdus amaurochalinus (passeriformes: muscicapidae): morphometrical analysis supported by chd gene. | sex determination is important for conservation and population studies, particularly for reproduction programs of threatened species and behavioural ecology. turdus amaurochalinus, creamy-bellied thrush, only exhibits sexual dimorphism during the breeding season, when males are considered to show intense yellow bills, and females and immature males show dark brown bills. the objectives of this study were: 1) to determine the sex of individuals using genetic techniques, and 2) to test the hypothe ... | 2011 | 21717857 |
| a new feather mite of the genus pteronyssoides hull, 1931 (astigmata: pteronyssidae) from thrushes (passeriformes: turdidae) in the new world. | a new feather mite species, pteronyssoides turdinus n. sp. (acariformes: pteronyssidae), is described from two species of thrushes, turdus amaurochalinus cabanis (type-host) and t. leucomelas vieillot (passeriformes: turdidae) in minas gerais, brazil. the new species belongs to the parinus species group and most clearly differs from previously known species of this group by the following features: in both sexes of p. turdinus, setae c2 are anterior to the level of the sejugal furrow; in males, t ... | 2016 | 26739290 |
| immature ticks on wild birds and the molecular detection of a novel rickettsia strain in the ibitipoca state park, southeastern brazil. | birds are recognized hosts of ticks, especially for the immature stages which may harbor various species and strains of rickettsia. to explore landscapes inhabited by birds and their ticks would expand the knowledge on host-parasite relationships and the rickettsiae. the aim of this paper was to record the diversity of ticks collected on wild birds and assess the phylogenetic position of a novel rickettsia strain detected in immature ticks. birds were captured in the ibitipoca state park, locate ... | 2020 | 32643110 |
| trophic niche similarities of sympatric turdus thrushes determined by fecal contents, stable isotopes, and bipartite network approaches. | an ecological niche has been defined as an n-dimensional hypervolume formed by conditions and resources that species need to survive, grow, and reproduce. in practice, such niche dimensions are measurable and describe how species share resources, which has been thought to be a crucial mechanism for coexistence and a major driver of broad biodiversity patterns. here, we investigate resource partitioning and trophic interactions of three sympatric, phylogenetically related and morphologically simi ... | 2020 | 32953047 |
| borrelia genospecies in ixodes sp. cf. ixodes affinis (acari: ixodidae) from argentina. | the aim of this work was to evaluate the presence of borrelia infection in ixodes sp. cf. ixodes affinis ticks from argentina. specimens of ixodes sp. cf. i. affinis were collected on vegetation and birds in five locations belonging the most humid part of the chaco biogeographic province. specimens were tested for borrelia infection by nested-pcr targeting the flab gene and the rrfa-rrlb intergenic spacer region (igs), sequenced and phylogenetically analyzed. a total of 48 ixodes sp. cf. i. affi ... | 2020 | 32993952 |
| isospora brasilsatoae n. sp. (apicomplexa: eimeriidae) from thrushes turdus spp. (passeriformes: turdidae) from brazil. | a new species of coccidia (protozoa: apicomplexa: eimeriidae) found parasitizing the yellow-legged thrush turdus flavipes (vieillot, 1818), the pale-breasted thrush turdus leucomelas vieillot, 1818 and the creamy-bellied thrush turdus amaurochalinus cabanis, 1850 in southeastern brazil is described. isospora brasilsatoae n. sp. has oocysts that are ovoidal to pyriform, 26.8 × 21.1 μm, with smooth, bilayered wall, ~1.6 μm thick. micropyle present. oocyst residuum absent, but one to three polar gr ... | 2019 | 30790929 |
| potential role of frugivorous birds (passeriformes) on seed dispersal of six plant species in a restinga habitat, southeastern brazil. | restingas are considered stressful habitats associated with the brazilian atlantic forest, and their ecological interactions are poorly known. the goal of the present study was to determine the potential role of frugivorous birds as seed dispersers in a restinga habitat. data were collected in parque nacional da restinga de jurubatiba, southeastern brazil, where the main physiognomy (open clusia formation) is characterized by the presence of patches of vegetation covering 20 to 48 % of the sandy ... | 2008 | 18624238 |
| community of arthropod ectoparasites of two species of turdus linnaeus, 1758 (passeriformes: turdidae) in southern rio grande do sul, brazil. | this study was aimed at describing the community of arthropod ectoparasites associated with sympatric populations of turdus amaurochalinus and turdus rufiventris and analyzing the aggregation patterns of the chewing lice species, during reproductive and nonreproductive periods, of both turdus species in three areas of the atlantic forest in southern rio grande do sul state (rs), brazil. altogether, we captured 36 specimens of t. amaurochalinus and 53 specimens of t. rufiventris. we identified tw ... | 2013 | 23093206 |