Results 141 to 150 of about 889 (175)
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Journal of the American Veterinary Medical Association, 2023
Abstract OBJECTIVE To evaluate the surgical technique and subsequent clinical observations (reproductive and ultrasound findings) of left unilateral ovariectomy in 3 species of Potamotrygon rays—Potamotrygon castexi, Potamotrygon leopoldi, and Potamotrygon motoro—for reproductive management. ANIMALS Between 2018 and 2019, multiple Potamotrygon rays (
Chelsea E, Anderson +3 more
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Abstract OBJECTIVE To evaluate the surgical technique and subsequent clinical observations (reproductive and ultrasound findings) of left unilateral ovariectomy in 3 species of Potamotrygon rays—Potamotrygon castexi, Potamotrygon leopoldi, and Potamotrygon motoro—for reproductive management. ANIMALS Between 2018 and 2019, multiple Potamotrygon rays (
Chelsea E, Anderson +3 more
openaire +2 more sources
Brazilian Journal of Biology, 2010 The stomach contents of 137 examples of Potamotrygon motoro caught in 3 locations (Muaná, Afuá and Lake Arari) on Marajó Island were analysed. The values of the Index of Relative Importance (IRI) and its respective percentage (%IRI) were calculated. The level of repletion 1 (¼ full) was the most representative for both sexes, as well as for immature ...
Patricia Charvet-Almeida +1 more
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Feeding behavior of the Neotropical freshwater stingray Potamotrygon motoro (Elasmobranchii: Potamotrygonidae) [PDF]
Neotropical Ichthyology, 2012 The feeding mechanisms of elasmobranchs and their functioning have been receiving growing scientific attention, although less emphasis has yet to be directed towards batoid species. The present study investigated the use of orobranchial musculature during prey capture and processing behavior in Potamotrygon motoro.
Akemi Shibuya, Jansen Zuanon
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Serial reversal learning in freshwater stingrays (Potamotrygon motoro)
Animal Cognition, 2019Serial reversal learning is considered a reliable approach for the testing of behavioral flexibility, and animals that inhabit fluctuating habitats and different environments are expected to possess behavioral and cognitive flexibility. The ocellate river stingray (Potamotrygon motoro) is one such species.
Martha M. M. Daniel, Vera Schluessel
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Envenomation by Amazonian freshwater stingray Potamotrygon motoro: 2 cases reported in Europe
Toxicon, 2006Freshwater stingrays of the Potamotrygon genus are regarded by native people in the Amazonia as dangerous fishes responsible of frequent stings. Small freshwater stingrays are imported to Europe and sold as aquarium fish because they are easy to keep captive.
Luc de Haro
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Spatial memory and orientation strategies in the elasmobranch Potamotrygon motoro
Journal of Comparative Physiology A, 2005We 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. Rays were trained to locate food within a four-arm maze placed in a room with visual spatial cues.
Schluessel, Vera, Bleckmann, Horst
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2014
Published as part of Litz, Thomas O. & The, Stefan Koerber Introduction, 2014, Check List of the Freshwater Fishes of Uruguay (CLOFF-UY)., pp.
Litz, Thomas O. +1 more
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Published as part of Litz, Thomas O. & The, Stefan Koerber Introduction, 2014, Check List of the Freshwater Fishes of Uruguay (CLOFF-UY)., pp.
Litz, Thomas O. +1 more
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PRESUMPTIVE DYSGERMINOMA IN AN ORANGE-SPOT FRESHWATER STINGRAY (POTAMOTRYGON MOTORO)
Journal of Zoo and Wildlife Medicine, 2015A captive-born, 13-yr-old female orange-spot freshwater stingray, (Potamotrygon motoro), presented with an acute caudodorsal swelling. Ultrasonography revealed an intracoelomic mass of mixed echogenicity containing fluid pockets. The ray was euthanatized and gross postmortem examination confirmed the presence of a fluid-filled coelomic mass in the ...
Yousuf S, Jafarey +4 more
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Preliminary data on the feeding habits of the freshwater stingrays Potamotrygon falkneri and Potamotrygon motoro (Potamotrygonidae) from the Upper Paraná River basin, Brazil [PDF]
Biota Neotropica, 2007 Stingrays of the Potamotrygonidae family are a singular group of Neotropical ichthyofauna. Although ancient reports exist about the group, there are still many questions that need to be clarified, such as the biology of the species that occur in the Paraná-Paraguay River system.
Virgínia Sanches Uieda
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Toxicon, 2008
Freshwater stingrays (Potamotrygon motoro) are known to cause human accidents through a sting located in its tail. In the State of Goiás, this accident happens especially during the fishing season of the Araguaia River. The P. motoro venom extracted from the sting presented hyaluronidase activity.
Marta R, Magalhães +2 more
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Freshwater stingrays (Potamotrygon motoro) are known to cause human accidents through a sting located in its tail. In the State of Goiás, this accident happens especially during the fishing season of the Araguaia River. The P. motoro venom extracted from the sting presented hyaluronidase activity.
Marta R, Magalhães +2 more
openaire +2 more sources