| esterase inhibition in tadpoles of scinax fuscovarius (anura, hylidae) as a biomarker for exposure to organophosphate pesticides. | organophosphate pesticides (ops) are among the most used insecticides in agriculture, causing the inhibition of esterases like acetylcholinesterase (ache), butyrylcholinesterase (bche) and carboxylesterase (cbe). pesticides can reach the aquatic environment, posing risks to non-target organisms, including tadpoles. | 2010 | 20383595 |
| dero (allodero) lutzi michaelsen, 1926 (oligochaeta: naididae) associated with scinax fuscovarius (lutz, 1925) (anura: hylidae) from semi-deciduous atlantic rain forest, southern brazil. | amphibians are hosts for a wide variety of ecto- and endoparasites, such as protozoans and parasitic worms. naididae is a family of oligochaeta whose species live on a wide range of substrates, including mollusks, aquatic macrophytes, sponges, mosses, liverworts, and filamentous algae. however, some species are known as endoparasitic from vertebrates, such as dero (allodero) lutzi, which is parasitic of the urinary tracts of frogs, but also have a free-living stage. specimens in the parasitic st ... | 2018 | 25945624 |
| first record of the lesser snouted treefrog scinax nasicus (cope, 1862) in brazilian coast and new species records for the state of rio grande do sul. | herein, we provide new occurrence records of scinax nasicus (cope, 1862) for the state of rio grande do sul, southern brazil. all new records here provide are located on southern half of the state. besides this, we provide the first record for species in brazilian coastal zone. those records improve considerably our knowledge regarding species distribution in southern brazil. | 2018 | 27849254 |
| a new species of amazonian snouted treefrog (hylidae: scinax) with description of a novel species-habitat association for an aquatic breeding frog. | the genus scinax is one of the most specious genera of treefrogs of the family hylidae. despite the high number of potential new species of scinax revealed in recent studies, the rate of species descriptions for amazonia has been low in the last decade. a potential cause of this low rate may be the existence of morphologically cryptic species. describing new species may not only impact the taxonomy and systematics of a group of organisms but also benefit other fields of biology. ecological studi ... | 2018 | 29441233 |
| a review of the elusive bicolored iris snouted treefrogs (anura: hylidae:scinax uruguayus group). | the genus scinax currently includes more than 120 species, recovered in two major clades, the s. catharinae and the s. ruber clades. the latter comprises 75 species, most of which remain unassigned to any species groups, while 12 are included in the s. rostratus and s. uruguayus groups. in this paper we present a taxonomic review of the two species currently included in the s. uruguayus group, discussing some putative phenotypic synapomorphies of this group. although s. pinima and s. uruguayus h ... | 2019 | 31553727 |
| correction: a review of the elusive bicolored iris snouted treefrogs (anura: hylidae:scinax uruguayus group). | [this corrects the article doi: 10.1371/journal.pone.0222131.]. | 2020 | 31725800 |
| 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 |
| dynamics of steroid-induced oocyte maturation in three amphibian species: mathematical modeling and simulation. | oocyte maturation in vertebrates involves morphological, biochemical, and functional changes through which meiosis, previously arrested in profase i, is resumed. within these changes, germinal vesicle breakdown (gvbd) constitutes morphological evidence of the resumption of the cellular cycle. sex steroids (progestins and androgens) play a key role in oocyte maturation and are considered inducers of this process. the aims of this study were to analyze the effect of sex steroids on the oocyte matu ... | 2018 | 30156763 |
| monitoring the morphological integrity of neotropical anurans. | amphibians are considered to be excellent bioindicators to their morphophysiological characteristics and life cycle. in this context, the present study investigated the morphological integrity of anuran larvae collected in preserved environments in the emas national park, in the municipality of mineiros (goiás state, brazil), and in environments representative of the agricultural matrix of the rio verde region, also in goiás, where there is a long history of the use of agricultural pesticides. s ... | 2019 | 30474816 |
| 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 |
| comparative cytogenetic analysis on four tree frog species (anura, hylidae, hylinae) from brazil. | a comparative cytogenetic analysis was carried out on four hylinae tree frogs from brazil ((aparasphenodon brunoi, corythomantis greeningi, osteocephalus langsdorffii, and scinax fuscovarius) using giemsa staining, brdu replication banding, ag-nor staining, c-banding, dapi and cma(3) fluorochrome staining, and fluorescence in situ hybridization (fish) with an rdna probe. all the species share closely similar 2n = 24 karyotypes, almost indistinguishable by standard staining. the technique of brdu ... | 2003 | 15004480 |
| diet of the colubrid snake, thamnodynastes strigatus (günther, 1858) from paraná state, brazil, with field notes on anuran predation. | dissection of 44 specimens of the colubrid snake thamnodynastes strigatus (serpentes: colubridae) provided data on food habits. prey items include frogs (71.4% of the sample), rodents (14.3%), fishes (10.7%), and lizards (3.6%). the most of the anuran species recorded (bufo sp., leptodactylus sp., physalaemus cuvieri and scinax fuscovarius) are ground dwellers or call at the water level. field observations provided information on the feeding behavior. | 2000 | 11241971 |
| genotoxic evaluation in tadpoles associated with agriculture in the central cerrado, brazil. | many agricultural practices cause environmental degradation that affects the cellular integrity of anurans. in the present study, we provided in situ data of dendropsophus minutus, physalaemus cuvieri, and scinax fuscovarius collected in soybean/corn and conservation units in the brazilian cerrado. the in situ data showed no significant variation in the micronucleus frequency between the sites, only the reniform cells had a higher rate for the agricultural environment. a combined analysis of all ... | 2019 | 30949743 |
| biochemical biomarkers in scinax fuscovarius tadpoles exposed to a commercial formulation of the pesticide fipronil. | one of the main pesticides used in the cultivation of sugarcane in são paulo state, brazil, is regent(®)800wg, the main active compound of which is fipronil. fipronil is a potent insecticide that eliminates pests, including insects resistant to pyrethroids, organophosphates (op) and carbamates (ca). there is little known on the toxic effects of fipronil on non-target organisms, such as tadpoles of frogs. it is possible that this compound carries a high toxicity for these organisms, since the pes ... | 2013 | 23489839 |