Results 11 to 20 of about 2,430 (247)

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

J Fish Biol
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 Uruguay.
Pereira DAS, Reis RE, Fontoura NF.
europepmc   +6 more sources

A taxonomic and morphological redescription of Potamotrygon falkneri Castex & Maciel, 1963 (Chondrichthyes: Myliobatiformes: Potamotrygonidae) [PDF]

Neotropical Ichthyology, 2011
Published as part of da Silva, João Paulo C. B. & de Carvalho, Marcelo R., 2011, A taxonomic and morphological redescription of Potamotrygon falkneri Castex & Maciel, 1963 (Chondrichthyes: Myliobatiformes: Potamotrygonidae), pp. 209-232 in Neotropical Ichthyology 9 (1) on pages 211-222, DOI: 10.1590/s1679-62252011000100021, http://zenodo.org/record ...
Marcelo R De Carvalho
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, Yu Huang, Vítor Yang, Xidong Mu, Qiong Shi, Agostinho Antunes   +5 more
doaj   +2 more sources

Behavioural assessment of Potamotrygon stingrays under different food enrichment strategies

Frontiers in Ethology
IntroductionFreshwater stingrays of the genus Potamotrygon are endemic to South America and increasingly maintained in aquaria worldwide, yet welfare studies on these species remain limited.
Cassia Regina Ramos Gonzaga, Cristiano Schetini de Azevedo, Helen Colbachini, Laura Chrispim Reisfeld, Fabiana Lúcia André Padilha, Rafael Caprioli Gutierrez, Cristiane Schilbach Pizzutto, Cristiane Schilbach Pizzutto   +7 more
doaj   +2 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, Jorge Ivan Rebelo Porto, Eliana Feldberg   +2 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

Potamotrygon motoro

, 2013
Potamotrygon motoro (Müller & Henle, 1841) Figs. 1-20, 21 b-c, 22 Synonymy of Potamotrygon motoro in the Paraná-Paraguay basin: Taeniura motoro: - Müller & Henle, 1841: 197-198 [original description, type locality: Cuiabá River, Brazil (“Fluss Cuyaba in Brasilien ”, p. 197)]; - Günther, 1870: 484 [brief description, synonymy].
Thiago Silva Loboda, Marcelo Rodrigues de Carvalho   +1 more
  +6 more sources

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. [PDF]

J Fish Biol
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
Kampfert LEP, Maicrovicz JC, Blanco DR, Lange D, Pavanelli CS, Brandão H.   +5 more
europepmc   +2 more sources

Analysis of the Entire Mitogenome of the Threatened Freshwater Stingray <i>Potamotrygon leopoldi</i> (Myliobatiformes: Potamotrygonidae) and Comprehensive Phylogenetic Assessment in the Xingu River, Brazilian Amazon. [PDF]

Int J Mol Sci
Guerreiro SLM, Vidal AF, Silva CS, Cavalcante GC, Magalhães L, Gomes DHF, Filho JCDS, Souza JES, Pires É, Oliveira G, Melo DSD, Sá ALA, Hamoy I, Ribeiro-Dos-Santos Â, Santos SEB.   +14 more
europepmc   +3 more sources

Description d'un sélacien rajiforme des eaux douces du Nord-Cameroun : POTAMOTRYGON GAROUAENSIS n.sp. [PDF]

, 1962
Blanc, M., Stauch, Alfred
core   +2 more sources