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
Preliminary data on the feeding habits of the freshwater stingrays Potamotrygon falkneri and Potamotrygon motoro (Potamotrygonidae) from the Upper Paran\ue1 River basin, Brazil [PDF]
Biota Neotropica, 2007 As raias da família Potamotrygonidae representam um grupo singular da ictiofauna Neotropical. Apesar de serem antigos os relatos sobre o grupo, ainda são muitas as questões que permanecem sem resposta, sobretudo no que diz respeito à biologia das ...
Silva,Thiago Buosi +6 more
core +7 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
Complete mitochondrial genome of the river stingray Potamotrygon orbignyi (Myliobatiformes: Potamotrygonidae) [PDF]
Mitochondrial DNA. Part B. Resources, 2019 The river stingray Potamotrygon orbignyi is a carnivorous bottom feeder that is widespread in the Amazonian region. We here assemble the 17,449 bp complete mitochondrial genome of the species, showing a typical gene arrangement as for related ...
David Ory +5 more
doaj +2 more sources
A histology-based study in apparently healthy wild freshwater stingrays Potamotrygon motoro [PDF]
Comparative Clinical Pathology, 2016 Histopathological studies are important as a reference in pathological process. There are a few of these studies in elasmobranchs. The aim of this study was to describe the histology of kidney, spleen, liver, and gills of wild apparently healthy ...
Viadanna, Pedro de Oliveira +7 more
core +4 more sources
[PROVISIONAL] Chromosomal characterization of Amazonian freshwater stingrays with evidence for new karyomorphs and XX/XY sex chromosomes [PDF]
Genetics and Molecular Biology, 2019 Cytogenetic studies in the subfamily Potamotrygoninae has already provided valuable insights into the understanding of the evolution and diversification of its species.
Francisco Carlos de Souza Valentim +2 more
doaj +2 more sources
Spatial memory and orientation strategies in the elasmobranch Potamotrygon motoro
Journal of Comparative Physiology A, 2005 We investigated whether juvenile freshwater stingrays (Potamotrygon motoro) can solve spatial tasks by constructing a cognitive map of their environment. Two experimental conditions were run: allocentric and ego-allocentric.
Schluessel, Vera, Bleckmann, Horst
core +6 more sources