| hemoparasites of the genus trypanosoma (kinetoplastida: trypanosomatidae) and hemogregarines in anurans of the são paulo and mato grosso do sul states - brazil. | wild animals are exposed to numerous pathogens, including hemoparasites. the trypanosoma and hemogregarinegroup are frequently reported as parasites in anurans (frogs, tree frogs and toads). the identification of these hemoparasites is usually made through stage observation of their morphology in the peripheral blood of the host. there areno studies, however, based on the biological cycle of these hemoparasites. the objective of the present study was toevaluate the presence of hemogregarines and ... | 2009 | 19488624 |
| diversity of anurans in dry forest fragments of a subtropical region in brazil. | this study aimed to identify and compare the diversity between two areas within different matrices located in the mesophytic semideciduous forest; to compare composition and diversity registered to other assemblages; and to evaluate which criteria used here were the most important when sampling them. data was obtained from september 2011 to march 2012 from 10 sites with different habitats in two areas of mid northern state of paraná, southern brazil. we recorded 18 species. alfa-diversity betwee ... | 2016 | 27901198 |
| acoustic niche partitioning in an anuran community from the municipality of floriano, piauí, brazil. | vocalizations are an important trait for the identification of cryptic and/or closely related amphibian species. different vocalizations also contribute to partitioning of the acoustic space by sympatric species. this study aimed to describe the advertisement calls of anurans in a pond of the municipality of floriano, state of piauí, brazil, and infer the acoustic niche partitioning of amphibians. euclidean distance was used in a cluster analysis approach to infer the acoustic similarities among ... | 2019 | 30365635 |
| atlantic amphibians: a data set of amphibian communities from the atlantic forests of south america. | amphibians are among the most threatened vertebrates in the world and this is also true for those inhabiting the atlantic forest hotspot, living in ecosystems that are highly degraded and threatened by anthropogenic activities. we present a data set containing information about amphibian communities sampled throughout the atlantic forest biome in south america. the data were extracted from 389 bibliographic references (articles, books, theses, and dissertations) representing inventories of amphi ... | 2018 | 29953585 |
| comparative cytogenetic analysis of some species of the dendropsophus microcephalus group (anura, hylidae) in the light of phylogenetic inferences. | dendropsophus is a monophyletic anuran genus with a diploid number of 30 chromosomes as an important synapomorphy. however, the internal phylogenetic relationships of this genus are poorly understood. interestingly, an intriguing interspecific variation in the telocentric chromosome number has been useful in species identification. to address certain uncertainties related to one of the species groups of dendropsophus, the d. microcephalus group, we carried out a cytogenetic analysis combined wit ... | 2013 | 23822759 |
| geographic variation in the advertisement calls of hyla eximia and its possible explanations. | populations of species occupying large geographic ranges are often phenotypically diverse as a consequence of variation in selective pressures and drift. this applies to attributes involved in mate choice, particularly when both geographic range and breeding biology overlap between related species. this condition may lead to interference of mating signals, which would in turn promote reproductive character displacement (rcd). we investigated whether variation in the advertisement call of the mou ... | 2014 | 25024904 |
| feeding mechanisms in two treefrogs, hyla nana and scinax nasicus (anura: hylidae). | after the description of the chondrocranium, hyobranchial apparatus, associated musculature, buccal apparatus, buccopharyngeal cavity, digestive tract, and gut contents, it was possible to define the feeding modes of scinax nasicus and hyla nana tadpoles (gosner stages 31-36). scinax nasicus larvae are "typical" microphagous tadpoles, with keratodonts and robust rostrodonts appropriate for rasping surfaces and mincing of food particles; the buccopharyngeal cavity is equipped with filtering struc ... | 2004 | 15216525 |
| chromosomal differentiation of hyla nana and hyla sanborni (anura, hylidae) with a description of nor polymorphism in h. nana. | specimens of hyla nana and hyla sanborni from a syntopic population were studied cytogenetically. these species are morphologically very similar and are frequently misidentified, confused with each other. both species had a diploid chromosome number, 2n = 30. however, the karyotypes of h. nana and h. sanborni differed considerably from each other in the number of submetacentric and telocentric chromosomes. the two species also differed in their primary nor-bearing chromosomes (metacentric pair 1 ... | 2006 | 12721226 |
| expression of n-cam-180 and n-cadherin during development in two south-american anuran species (bufo arenarum and hyla nana). | cadherins and n-cam are ca++-dependent and ca++-independent cell adhesion molecules respectively. these molecules play a key role in morphogenesis and histogenesis. we determined the spatiotemporal pattern of n-cadherin and n-cam-180 kda expression by immunohistochemistry during development in two south-american anuran species (bufo arenarum, toad and hyla nana, frog). both n-cadherin and n-cam were not detectable during early developmental stages. expression of n-cadherin appeared between the i ... | 2000 | 11214866 |
| [feeding of two amphibian species (anura: hylidae) during the low temperatures season and its relationship with energy storage in santa fe, argentina]. | feeding of two amphibian species (anura: hylidae) during the low temperatures season and its relationship with energy storage in santa fe, argentina. in environments with thermal and pluvial seasonality such as those of the middle paraná river floodplain (province of santa fe, argentina), most amphibian species reproduce during the warm season and drastically diminish their activity during winter. even though, a few species remain active during the cold season, such as hypsiboas pulchellus that ... | 2013 | 23885597 |
| pond characteristics influence the intraspecific variation in the morphometry of the tadpoles of two species of dendropsophus (anura: hylidae) from the cerrado savanna of northeastern brazil. | spatial variation in the environment may be an important source of morphological variation in many organisms. tadpoles are valuable model organisms for studies of morphological variation, and in particular, the evaluation of the relationship between environmental and morphological variables. in heterogeneous environments, such as the temporary ponds found in the cerrado savanna of central brazil, understanding how environmental variables influence the morphological variation found in tadpole pop ... | 2020 | 33146260 |
| bioacoustic analysis of advertisement call in hyla nana and hyla sanborni (anura, hylidae) in botucatu, são paulo, brazil. | vocal communication traits of hyla nana and hyla sanborni, of the nana species group, were studied from august 1997 until june 1999 in two large permanent ponds located in an open field in botucatu, são paulo state. one hundred thirty-one individuals, 71 of h. nana and 58 of h. sanborni, were recorded in the beginning of their vocalization activity and during chorus vocalization. the rhythms of sound emission on the two occasions were different. an advertisement call consists in a consecutive se ... | 2003 | 14758710 |