Results 1 to 10 of about 1,538 (201)

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, X. Mu, Q. Shi, A. Antunes   +5 more
semanticscholar   +11 more sources

Visual discrimination and resolution in freshwater stingrays (Potamotrygon motoro) [PDF]

J Comp Physiol A Neuroethol Sens Neural Behav Physiol, 2020
Potamotrygon motoro has been shown to use vision to orient in a laboratory setting and has been successfully trained in cognitive behavioral studies using visual stimuli. This study explores P.
Martha M. M. Daniel, Laura Alvermann, Imke M. Böök, V. Schluessel   +3 more
semanticscholar   +5 more sources

Acidentes causados pela arraia fluvial Potamotrygon motoro em comunidades lacustres em Território do bioma Oriental da Amazônia [PDF]

Saúde e meio ambiente: revista interdisciplinar, 2021
The injuries caused by freshwater stingrays are common among fishermen. The raya Potamotrygon motoro en the features a stinger with a sharp edge and serrated tips spread bilaterally, the stingers have toxins that promote vasoconstriction, causing ...
Jailma Araújo da Costa, A. Martins, Leonardo Manir Feitosa, Vidal Haddad Junior, Ingredy Eylanne Monroe Carvalho, J. L. S. Nunes   +5 more
semanticscholar   +4 more sources

Production of live offspring following unilateral (left) ovariectomized Potamotrygon rays (Potamotrygon castexi, Potamotrygon leopoldi, and Potamotrygon motoro).

Journal of the American Veterinary Medical Association, 2023
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-
Chelsea E. Anderson, J. D. Gillis, Sarah N Miller, Michelle R. Davis   +3 more
semanticscholar   +3 more sources

Dimorfismo sexual de las aletas pélvicas en Potamotrygon motoro (Batoidea: Potamotrigonidae)

Revista de Investigaciones Veterinarias del Perú, 2023
Los claspers en los condrictios son alargamientos especializados en el lado posterior de las aletas pélvicas de los machos que se utilizan para la transferencia de esperma durante la cópula.
D. Pérez, G. Olea, Tania Blanco Cohene, Evelyn Rodriguez Florencia, C. Flores Quintana   +4 more
semanticscholar   +4 more sources

Not just shades of grey: life is full of colour for the ocellate freshwater river stingray (Potamotrygon motoro). [PDF]

Journal of Experimental Biology, 2021
Previous studies have shown that marine stingrays have the anatomical and physiological basis for colour vision, with cone spectral sensitivities in the blue to green range of the visible spectrum.
V. Schluessel, I. P. Rick, F. Seifert, C. Baumann, Wayne I. L. Davies   +4 more
semanticscholar   +3 more sources

Pre-copulatory bite wounds as evidence of aggressive competition for mating in the neotropical freshwater stingray Potamotrygon motoro

Acta Amazonica, 2022
Reproductive aspects of Amazonian freshwater stingrays are still poorly studied, however, it is known that the copulatory behavior in some species is related to the hydrometric seasons (high and low water).
Akemi Shibuya, W. Duncan
semanticscholar   +1 more source

Neutralization of the edema-forming and myotoxic activities of the venom of Potamotrygon motoro Müller and Henle, 1841 (Chondrichthyes - Potamotrygoninae) by antivenoms and circulating immunoglobulins.

Toxicon, 2020
Freshwater stingrays are cartilaginous fish with stingers at the base of their tail. The stinger is covered with an epithelium containing mucous and venom glands.
J. Lameiras, Valéria Mourão de Moura, L. C. Dias, Evandro Rezende Pessoa Júnior, C. Mallmann, A. G. Costa, M. Lasmar, C. Nunez, Oscar Tadeu Ferreira da Costa, M. C. Dos-Santos   +9 more
semanticscholar   +1 more source

Índices Parasitários de Brevimulticaecum sp. (Nematoda: Heterocheilidae) Em Potamotrygon motoro (Chondrichthyes: Potamotrygonidae) Capturados no Arquipélago do Bailique, Macapá

, 2020
O numero de nematodeos descritos em elasmobrânquios e relativamente pequeno, sendo encontrados majoritariamente no trato digestorio. Apesar de alguns relatos descritos, a literatura a respeito ainda e considerada escassa principalmente sobre a associacao
Antonio Carlos Freitas Souza, Cecile Souza Gama, Anderson Luiz Pena da Costa, Jociel Ferreira Costa, Diego Carvalho Viana   +4 more
semanticscholar   +1 more source

Notes on the occurrence and gender-based morphological aspects of Potamotrygon motoro (Elasmobranchii: Potamotrygonidae) in the complex of the Viana lake system- Maranhão, Brazil

, 2020
The Brazilian Amazonian coast, extending from Amapá to Maranhão states, is drained by a series of small to medium sized rivers of the Amazon basin. The PindaréMearim is an isolated basin formed by the junction of the Pindaré and Mearim rivers at its ...
G. Rincon, K. M. Pereira, Carlos Santos, N. Wosnick, Ana Rita Onodera Palmeira Nunes, R. Leite, Y. Araújo, I.C.B.S. Silva, André Luis Coelho da Silva, J. Nunes   +9 more
semanticscholar   +1 more source