Karyotype description and evidence of multiple sex chromosome system X1X1X2X2/X1X2Y in Potamotrygon aff. motoro and P. falkneri (Chondrichthyes: Potamotrygonidae) in the upper Paraná River basin, Brazil [PDF]
Neotropical Ichthyology, 2011 Cytogenetic analysis of Potamotrygon aff. motoro and P. falkneri indicated the occurrence of an X1X1X2X2/X1X2 Y multiple sex chromosome system in both species, with 2n = 66 chromosomes for females and 2n = 65 chromosomes for males. The nucleolus organizer regions (NORs) identified using Ag-NOR technique showed that both species have multiple Ag-NORs (5
Vanessa Paes Cruz +2 more
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Transcriptomic Characterization of the South American Freshwater Stingray Potamotrygon motoro Venom Apparatus. [PDF]
Toxins (Basel), 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
Silva F +5 more
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A comparative analysis of feeding and trophic level ecology in stingrays (Rajiformes; Myliobatoidei) and electric rays (Rajiformes: Torpedinoidei). [PDF]
PLoS ONE, 2013 Standardised diets and trophic level (T L) estimates were calculated for 75 ray species from the suborders Myliobatoidei (67 spp.) and Torpedinoidei (8 spp.).
Ian P Jacobsen, Mike B Bennett
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Eurasian jays do not copy the choices of conspecifics, but they do show evidence of stimulus enhancement. [PDF]
PeerJ, 2016 Corvids (birds in the crow family) are hypothesised to have a general cognitive tool-kit because they show a wide range of transferrable skills across social, physical and temporal tasks, despite differences in socioecology.
Miller R +3 more
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Toxicon, 2011 Pain is the most conspicuous symptom observed in patients wounded by stingrays, and skin necrosis is common in accidents by freshwater stingrays. The extract from the stinger integumentary tissue of Potamotrygon falkneri containing toxic components (venom) was tested for its ability to induce histopathological changes in the dorsal skin of mice at ...
Domingos Garrone Neto, Carlos Jared
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Acta Scientiarum: Biological Sciences, 2006 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 ...
Milza Celi Fedatto Abelha +3 more
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Potamotrygon falkneri Castex & Maciel 1963 [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 ...
da Silva, João Paulo C. B. +1 more
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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 Nelson Jorge da Silva Jr, Steven D Aird
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Digenea, Nematoda, Cestoda, and Acanthocephala, parasites in Potamotrygonidae (Chondrichthyes) from the upper Paraná River floodplain, states of Paraná and Mato Grosso do Sul, Brazil [PDF]
Check List, 2008 The present paper represents the first study on the endoparasitic fauna of Potamotrygon falkneri and P. motoro in the upper Paraná River floodplain. Fishes were collected by fishing rod and gillnetting in different stations of the floodplain, from March,
Ana Lacerda +2 more
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Potamotrygon falkneri Castex & Maciel 1963
, 2020 P. falkneri Castex & Maciel, 1963 Potamotrygon falkneri Castex & Maciel, 1963 info Potamotrygon menchacai Martínez Achenbach, 1967 Potamotrygon castexi Castello & Yagolkowski, 1969 type localities castexi: Santa Fé, Rosario, Río Paraná falkneri: Entre Ríos, Río Paraná medio menchacai: Santa Fé, Río ...
Mirande, Juan Marcos, Koerber, Stefan
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