Cytogenetic and molecular characteristics of Potamotrygon motoro and Potamotrygon sp. (Chondrichthyes, Myliobatiformes, Potamotrygonidae) from the Amazon basin: Implications for the taxonomy of the genus [PDF]
Genetics and Molecular Biology, 2021 The chromosomes of two freshwater stingrays, Potamotrygon motoro and Potamotrygon sp., from the Amazon River basin in Brazil were investigated using integrated molecular (cytochrome c oxidase subunit 1) and cytogenetic analyses.
Maria Lígia Oliveira Nobile +2 more
exaly +4 more sources
Distribution modelling for Neotropical freshwater stingrays Potamotrygon brachyura and Potamotrygon motoro ( Myliobatiformes, Potamotrygonidae ) in the Uruguay River basin [PDF]
Journal of Fish BiologyAbstract 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 Araújo Soares Pereira +2 more
exaly +3 more sources
A Severe Accident Caused by an Ocellate River Stingray (Potamotrygon motoro) in Central Brazil: How Well Do We Really Understand Stingray Venom Chemistry, Envenomation, and Therapeutics? [PDF]
Toxins, 2015 Freshwater stingrays cause many serious human injuries, but identification of the offending species is uncommon. The present case involved a large freshwater stingray, Potamotrygon motoro (Chondrichthyes: Potamotrygonidae), in the Araguaia River in ...
Nelson Jorge da Silva, Steven D Aird
exaly +4 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 +5 more
doaj +2 more sources
Testicular Morphology and Spermatogenesis in Potamotrygon motoro: Insights Into Reproduction of Freshwater Stingrays. [PDF]
J MorpholElectron 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 +6 more
europepmc +2 more sources
Foreign stingers: South American freshwater river stingrays Potamotrygon spp. established in Indonesia [PDF]
Scientific Reports, 2023 The pet trade is known to be one of the most important pathways of aquatic non-native species introduction and Indonesia is a significant trade partner. Popular ornamental South American river stingrays (Potamotrygon spp.) were introduced to Indonesia in
Rikho Jerikho +10 more
doaj +2 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 +7 more
doaj +2 more sources
DNA barcode reveals the illegal trade of rays commercialized in fishmongers in Brazil [PDF]
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 +6 more
doaj +2 more sources
Counting on Numbers—Numerical Abilities in Grey Bamboo Sharks and Ocellate River Stingrays [PDF]
Animals, 2021 Over the last decade, studies examining the cognitive abilities of fish have increased, using a broad range of approaches. One of the foci has been to test the ability of fish to discriminate quantities of items and to determine whether fish can solve ...
Nils Kreuter +4 more
doaj +2 more sources
Ichthyological ethnoknowledge of the “piabeiros” from the Amazon region, Brazil [PDF]
Journal of Ethnobiology and Ethnomedicine, 2021 Background The capture of ornamental fish is one of the main economic activities of riverine families in the Amazon. However, studies regarding the local ecological knowledge of workers in this activity are still incipient.
Daniel da Silva Ladislau +5 more
doaj +2 more sources