Results 91 to 100 of about 414 (162)

Hábitos alimentares e sobreposição trófica das raias Potamotrygon falkneri e Potamotrygon motoro (Chondrichthyes, Potamotrygonidae) na planície alagável do alto rio Paraná, Brasil = Feeding habitats and trophic overlap of the freshwater stingrays Potamotrygon falkneri e Potamotrygon motoro (Chondrichthyes, Potamotrygonidae) in the upper Paraná river floodplain, Brazil

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, Alessandra Pasian Lonardoni, Erivelto Goulart, Edson Fontes de Oliveira   +3 more
doaj  

The use of pelvic fins for benthic locomotion during foraging behavior in Potamotrygon motoro (Chondrichthyes: Potamotrygonidae)

Zoologia (Curitiba), 2015
Synchronized bipedal movements of the pelvic fins provide propulsion (punting) during displacement on the substrate in batoids with benthic locomotion. In skates (Rajidae) this mechanism is mainly generated by the crural cartilages.
Akemi Shibuya, Marcelo R. de Carvalho, Jansen Zuanon, Sho Tanaka   +3 more
doaj   +1 more source

Potamotrygon scobina Garman 1913

Potamotrygon scobina Garman 1913 Distribution Amazonia.
Escobar-Camacho, Daniel, Valdiviezo-Rivera, Jonathan, Carrillo-Moreno, Carolina, Argüello, Pablo, Swing, Kelly   +4 more
openaire   +1 more source

Hematological parameters of freshwater stingrays from the lower river negro, Amazonas, Brazil [PDF]

Brazilian Journal of Biology
Freshwater stingrays of the subfamily Potamotrygoninae represent a unique group of elasmobranchs exclusively adapted to freshwater environments in South America.
R. M. Paixão, A. R. S. Liebl, M. F. S. Gomes, M. W. S. Ribeiro, A. N. A. Santos, J. P. F. Rufino, A. C. N. Alves, A. T. Oliveira   +7 more
doaj   +2 more sources

Caracterización morfológica de los estadios embrionarios de la raya dulceacuícola Potamotrygon magdalenae (Elasmobranchii: Potamotrygonidae)

Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 2022
Potamotrygon magdalenae, una raya perteneciente a la familia Potamotrygonidae distribuida en la cuenca del río Magdalena, es considerada de muy alta prioridad para la investigación en el Plan de Acción Nacional para la Conservación y Manejo de Tiburones,
Sergio Antonio Lizcano-Gutiérrez, Martha Patricia Ramírez-Pinilla   +1 more
doaj  

Ecophysiological interactions and water-related physicochemical parameters among freshwater stingrays

Brazilian Journal of Biology
The objective of this study was to compare and correlate the ecology of neonates and young individuals of Potamotrygon wallacei, Potamotrygon motoro and Paratrygon aiereba with regard to their hematological profile and the physicochemical parameters of ...
A. T. Oliveira, M. L. G. Araújo, J. R. G. Lemos, M. Q. C. Santos, J. Pantoja-Lima, P. H. R. Aride, M. Tavares-Dias, J. L. Marcon   +7 more
doaj   +1 more source

Fístula arterio-venosa secundaria a picadura de raya de río Arteriovenous fistula secondary to stingray puncture

Iatreia, 1993
<p class="MsoNormal"><span style="font-size: 9pt; font-family: Arial">Se presenta el caso de un paciente de sexo masculino, pescador, lesionado en la región fe. moral por una raya de río (Potamotrygon magdalenne) lo que le produjo una fístula
Rodrigo Girón, Emilio Alberto Restrepo Baena   +1 more
doaj  

Levels of Total Mercury and Health Risk Assessment of Consuming Freshwater Stingrays (Chondrichthyes: Potamotrygoninae) of the Brazilian Amazon. [PDF]

Int J Environ Res Public Health, 2023
Oliveira AT, Rodrigues PA, Ramos Filho AM, Gomes MFDS, Liebl ARDS, de Pinho JV, Aride PHR, Conte-Junior CA.   +7 more
europepmc   +1 more source

Mapping of the venomous stingrays of the Potamotrygon genus in the Tietê River, São Paulo Sstate, Brazil. [PDF]

Rev Soc Bras Med Trop, 2022
Moreira ISR, Haddad Junior V.
europepmc   +1 more source

Occurrence of the hemoparasite Cyrilia spp. in the Amazonian stingray Potamotrygon wallacei

Anais da Academia Brasileira de Ciências
Abstract Freshwater stingrays play a crucial ecological role in the Amazon; however, studies on their parasitic fauna still need to be made available. This study aimed to investigate the occurrence of hemoparasites, specifically Cyrilia spp., in specimens of Potamotrygon wallacei from the Lower Rio Negro, Brazil.
ANA CLARA N. ALVES, LARISSA D. FONSECA, RAYANA M. PAIXÃO, ADRIANO T. OLIVEIRA   +3 more
openaire   +4 more sources