Results 31 to 40 of about 374 (150)

Potamotrygon boesemani (Chondrichthyes: Myliobatiformes: Potamotrygonidae), a new species of Neotropical freshwater stingray from Surinam

Neotropical Ichthyology
Potamotrygon boesemani, new species, is described from the Corantijn river drainage in Surinam. The species has a diagnostic dorsal color pattern formed by deep orange to red ocellated spots of irregular form, encircled by relatively broad black rings ...
Ricardo S. Rosa, Marcelo R. de Carvalho, Cristiane de Almeida Wanderley   +2 more
doaj   +1 more source

Transcriptomic Characterization of the South American Freshwater Stingray Potamotrygon motoro Venom Apparatus

Toxins, 2018
Venomous animals are found through a wide taxonomic range including cartilaginous fish such as the freshwater stingray Potamotrygon motoro occurring in South America, which can injure people and cause venom-related symptoms. Ensuring the efficacy of drug
Filipe Silva, Yu Huang, Vítor Yang, Xidong Mu, Qiong Shi, Agostinho Antunes   +5 more
doaj   +1 more source

Hábitos alimentares e sobreposição trófica das raias Potamotrygon falkneri e Potamotrygon motoro (Chondrichthyes, Potamotrygonidae) na planície alagável do alto rio Paraná, Brasil - DOI: 10.4025/actascibiolsci.v28i3.208

Acta Scientiarum: Biological Sciences, 2007
As raias Potamotrygon falkneri e Potamotrygon motoro foram avaliadas em relação à composição de suas dietas e a sobreposição do nicho trófico nos períodos de seca (agosto/2004) e cheia (janeiro/2005) na planície alagável do alto rio Paraná, em três ...
Alessandra Pasian Lonardoni, Erivelto Goulart, Edson Fontes de Oliveira, Milza Celi Fedatto Abelha   +3 more
doaj   +1 more source

Potamotrygon Garman 1877

, 2018
Published as part of Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, pp. 1-111 in Neotropical Ichthyology 16 (2) on page 15, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record ...
Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da, Pavanelli, Carla Simone   +3 more
openaire   +1 more source

Branchial localization of acid (A‐type) and base (B‐type) excreting ionocytes in Amazonian stenohaline freshwater Potamotrygon ray

Journal of Fish Biology, EarlyView.
Abstract The branchial epithelium of Potamotrygon—a member of the only strictly freshwater elasmobranch family Potamotrygonidae—was observed via immunohistochemistry, and two distinct forms of ionocytes were identified. The acid (A‐type) and base (B‐type) secreting cells with respective basolateral–apical localizations of Na+/K+‐ATPase–Na+/H+ exchanger
M. W. Rossi, C. M. Wood, A. L. Val, J. M. Wilson   +3 more
wiley   +1 more source

Heterogeneidade de hemoglobina nos peixes da Amazonia [PDF]

Acta Amazonica, 1978
Resumo Os padrões eletroforáticos de hemoglobinas de peixes da Amazônia foram descritos. Os peixes incluíram a pirambóia sul-americana, Lepidosiren paradoxa, quatro espécies de raias de água doce do género Potamotrygon e teleósteos sctinopterígeos de 77 ...
Unni E. H. Fyhn, Hans Jorgen Fyhn, Bonnie J. Davis, Dennis A. Powers, William L. Fink, Robert L. Garlick   +5 more
doaj   +1 more source

Distribution modelling for Neotropical freshwater stingrays Potamotrygon brachyura and Potamotrygon motoro (Myliobatiformes, Potamotrygonidae) in the Uruguay River basin

Journal of Fish Biology, EarlyView.
Abstract This study aimed to identify geographical distribution patterns of the giant short‐tailed river stingray Potamotrygon brachyura and the motoro stingray Potamotrygon motoro in the Uruguay River basin. Data on presence/absence of stingrays were based on fishers' knowledge accessed by interviews through expeditions in Brazil, Argentina and ...
Danilo Araujo Soares Pereira, Roberto E. Reis, Nelson F. Fontoura   +2 more
wiley   +1 more source

DNA barcode reveals the illegal trade of rays commercialized in fishmongers in Brazil

Forensic Science International: Synergy, 2020
Sequences of the mitochondrial gene COI (DNA Barcode) were used to identify species of rays and skates commercialized in fishmongers in Brazil. The comparisons of the obtained sequences with previously published data available in NCBI and BOLD showed ...
Raul B. Camacho-Oliveira, Cahique M. Daneluz, Fernanda D. do Prado, Ricardo Utsunomia, Carlos E. Rodrigues, Jr., Fausto Foresti, Fábio Porto-Foresti   +6 more
doaj   +1 more source

Linking rivers, mixing faunas: How artificial connectivity between the Middle and Upper Paraná River basins shapes fish diversity in a tributary of the Itaipu Reservoir, Brazil

Journal of Fish Biology, EarlyView.
Abstract This work aimed to investigate the distribution and occurrence of fish species along the São Francisco Falso Braço Norte (SFFBN) River basin, a tributary of the Middle Paraná River basin now artificially connected to the Upper Paraná ecoregion, to evaluate how such connectivity may affect the biogeographic distribution and regional composition
Lucas E. P. Kampfert, João C. Maicrovicz, Daniel R. Blanco, Denise Lange, Carla S. Pavanelli, Heleno Brandão   +5 more
wiley   +1 more source

Occurrence of multiple congenital anomalies in Potamotrygon amandae (Elasmobranchii, Potamotrygoninae) embryos, including the first report of bicephaly

Journal of Fish Biology, EarlyView.
Abstract Reports of teratogenic embryos in elasmobranchs have been documented in multiple species, with proposed aetiologies including environmental disturbances, genetic mutations, predation, exposure to endocrine‐disrupting compounds and maternal stress.
Douglas de Castro Ribeiro, Raquel Lopes Queiroz, Cristiéle da Silva Ribeiro   +2 more
wiley   +1 more source