Results 1 to 10 of about 3,591 (200)

Case report: Clinical management of freshwater stingray wounds using negative pressure therapy [PDF]

Frontiers in Medicine
Stingray injuries represent a significant occupational hazard, particularly for fishermen, and are commonly caused by freshwater stingrays of the Potamotrygonidae family. These stingrays are equipped with a sharp, bilaterally serrated spine that delivers
Janio J. M. Nattrodt, Victória A. Bezerra-de-Freitas, Ana Paula S. S. Merval, Eloise T. Filardi, Felipe A. Cerni, Domingos S. M. Dantas, Alysson B. M. Lins, Alysson B. M. Lins, Luis E. B. Galan, Luis E. B. Galan, Roberto C. Carbonell, Roberto C. Carbonell, Manuela B. Pucca, Manuela B. Pucca   +13 more
doaj   +6 more sources

Morphological, cytochemical and ultrastructural aspects of blood cells in freshwater stingray species in the middle Rio Negro basin of Amazonian Brazil [PDF]

Scientific Reports, 2021
In the present work, we examined the morphology, dimensions, cytochemical staining reactions and ultrastructure of blood cells from three freshwater stingray species, Potamotrygon wallacei, Potamotrygon motoro and Paratrygon aiereba, living in the waters
Adriano Teixeira de Oliveira, Jefferson Raphael Gonzaga de Lemos, Marcio Quara de Carvalho Santos, Jackson Pantoja-Lima, Paulo Henrique Rocha Aride, Maria Lúcia Góes de Araújo, Marcos Tavares-Dias, Jaydione Luiz Marcon   +7 more
doaj   +3 more sources

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

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   +6 more sources

Ascorbic Acid Biosynthesis and Brackish Water Acclimation in the Euryhaline Freshwater White-Rimmed Stingray, Himantura signifer. [PDF]

PLoS ONE, 2013
L-gulono-γ-lactone oxidase (Gulo) catalyzes the last step of ascorbic acid biosynthesis, which occurs in the kidney of elasmobranchs. This study aimed to clone and sequence gulonolactone oxidase (gulo) from the kidney of the euryhaline freshwater ...
Samuel Z H Wong, Biyun Ching, You R Chng, Wai P Wong, Shit F Chew, Yuen K Ip   +5 more
doaj   +17 more sources

First Chromosome-level Genome Assembly and Annotation of an Endangered Freshwater Stingray (Fontitrygon garouaensis) from Africa [PDF]

Scientific Data
Fontitrygon garouaensis (Smooth Freshwater Stingray) is an evolutionarily distinct and globally endangered species and is currently the only stingray known to be strictly adapted to African freshwater systems.
Lotanna Micah Nneji, Segun Olayinka Oladipo, Oyetola Olusegun Oyebanji, Adeola Oluwakemi Ayoola, Olatunde Omotoso, Ifeanyi Christopher Nneji, Kehinde Moruff Adelakun   +6 more
doaj   +2 more sources

First report of Vandellia sp. parasiting the Raspy river stingray Potamotrygon scobina in the Amazon basin [PDF]

Revista Brasileira de Parasitologia Veterinária
This study reports the first record of candiru, Vandellia sp. parasitizing the freshwater stingray Potamotrygon scobina in the Amazon basin, Brazil. In April 2018, a specimen of Potamotrygon scobina was collected by bottom long-term using fish as bait ...
Paulo Arthur Abreu Trindade, Felipe Antônio Silva Jr, Marcos Sidney Brito Oliveira, Carson Allen Jeffres, Marcelo Ândrade, Tommaso Giarrizzo   +5 more
doaj   +2 more sources

Karyotypic variation of two populations of the small freshwater stingray Potamotrygon wallacei Carvalho, Rosa & Araújo 2016: A classical and molecular approach. [PDF]

PLoS ONE, 2023
Potamotrygoninae comprises a group of Neotropical fishes with an ancient relationship with marine environments. In the last few years, 11 new Potamotrygon species were described, including Potamotrygon wallacei Carvalho, Araújo e Rosa 2016.
Alex M V Ferreira, Patrik F Viana, Leandro Marajó, Eliana Feldberg   +3 more
doaj   +2 more sources

Testicular Morphology and Spermatogenesis in Potamotrygon motoro: Insights Into Reproduction of Freshwater Stingrays. [PDF]

J Morphol
Electron microscopy of Potamotrygon motoro spermatozoa. a – Illustration of a schematic sperm cell depicting the helical head, intermediate piece (midpiece), and flagellum. b ‐ Helical heads (Hh) of spermatozoa inserted into the cytoplasm of Sertoli cells (S) through openings in the plasma membrane. Scales: 10 μm.
Delgado MLR, Quirino PP, Gomes-Silva L, Dzyuba V, Dzyuba B, Ninhaus-Silveira A, Veríssimo-Silveira R.   +6 more
europepmc   +2 more sources

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

J Fish Biol
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 ...
Pereira DAS, Reis RE, Fontoura NF.
europepmc   +2 more sources

Interspecific Associations of the Rare and Endangered Stingray (<i>Styracura schmardae</i>) in Caribbean Sandy-Bottom Habitats. [PDF]

Ecol Evol
We document novel interspecific associations of the endangered Atlantic chupare stingray (Styracura schmardae) in Caribbean sandy‐bottom habitats. Observations include nuclear–follower interactions with needlefish (Strongylura marina) and hitchhiking by sharksuckers (Echeneis naucrates), revealed through direct in situ records and citizen science data ...
de Carvalho-Souza GF, Sparaventi E, Echeverría-Sáenz S.   +2 more
europepmc   +2 more sources