Results 31 to 40 of about 889 (175)

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. El objetivo del presente estudio fue la descripción y caracterización de la morfología externa y los componentes esqueléticos en aletas pélvicas del clasper de ...
Dante Pérez, Gabriela Olea, Tania Blanco Cohene, Evelyn Rodriguez Florencia, Carolina Flores Quintana   +4 more
openaire   +3 more sources

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, Ricardo Takemoto, Gilberto Pavanelli   +2 more
doaj   +5 more sources

Proposal of a non-lethal visual census method to estimate freshwater stingray abundance

Universitas Scientiarum, 2016
There is not a current method to estimate South American freshwater stingray’s abundance. Therefore we designed a census method and tested it in the field.
Mónica Andrea Morales-Betancourt, Carlos Andrés Lasso-Alcalá   +1 more
doaj   +1 more source

UMA ÁREA DE VIDA RESTRITA AUMENTA A VULNERABILIDADE DA RAIA-DE-FOGO, Potamotrygon motoro, A PESCA EM UM HOTSPOT DE BIODIVERSIDADE DA REGIÃO NEOTROPICAL [PDF]

, 2021
In this study a telemetry-based approach was used to examine the movements and the habitat utilization of Potamotrygon motoro, a widespread species of potamotrygonid stingray of South America.
Daros, Felippe Alexandre Miranda de Lisboa, de Souza, Gabriel Raposo Silva, Garrone-Neto, Domingos, Lasso, Carlos Andrés, Morales-Betancourt, Mónica Andrea, Novoa-Serna, Jairo Fidel   +5 more
core   +2 more sources

Hábitos alimentares e sobreposição trófica das raias Potamotrygon falkneri e Potamotrygon motoro (Chondrichthyes, Potamotrygonidae) na planície alagável do alto rio Paraná, Brasil - DOI: 10.4025/actascibiolsci.v28i3.208

Acta Scientiarum: Biological Sciences, 2007
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 ...
Alessandra Pasian Lonardoni, Erivelto Goulart, Edson Fontes de Oliveira, Milza Celi Fedatto Abelha   +3 more
doaj   +1 more source

Morfometria de raias continentais (Chondrichthyes, Potamotrygonidae) do alto rio Paraná, Brasil - DOI: 10.4025/actascibiolsci.v29i4.885

Acta Scientiarum: Biological Sciences, 2008
Potamotrygonidae constitui o único grupo recente de Chondrichthyes cujo habitat está restrito, exclusivamente, a águas continentais. Na planície de inundação do Alto rio Paraná, espécies desta família estabeleceram-se após o fechamento das comportas da ...
Antonio Guilherme Cândido da Silva, Erivelto Goulart   +1 more
doaj   +1 more source

Morphology and morphometry of blood cells of two species of freshwater stingrays (Chondrichthyes: Potamotrygoninae) from the lower Solimões river, Amazon [PDF]

Anais da Academia Brasileira de Ciências
Cytomorphological evaluation of peripheral blood provides information about the health status of animals, in addition to being indicators of environmental contamination.
MARCIO QUARA DE C. SANTOS, FLÁVIA DAYANE F. FARIAS, PAULO HENRIQUE R. ARIDE, ADRIANO T. OLIVEIRA   +3 more
doaj   +1 more source

Ascorbic Acid Biosynthesis and Brackish Water Acclimation in the Euryhaline Freshwater White-Rimmed Stingray, Himantura signifer [PDF]

, 2013
10.1371/journal.pone.0066691PLoS ...
Chew, S.F., Ching, B., Chng, Y.R., Ip, Y.K., Wong, S.Z.H., Wong, W.P.   +5 more
core   +2 more sources

A histology-based study in apparently healthy wild freshwater stingrays Potamotrygon motoro [PDF]

Comparative Clinical Pathology, 2015
Histopathological studies are important as a reference in pathological process. There are a few of these studies in elasmobranchs. The aim of this study was to describe the histology of kidney, spleen, liver, and gills of wild apparently healthy Potamotrygon motoro. However, we observed some pathological findings in these animals. Nineteen P.
de Moraes, Julieta Engrácia, Yunis Aguinaga, Jefferson, Viadanna, Pedro de Oliveira, de Moraes, Flávio Ruas   +3 more
openaire   +3 more sources

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

Journal of Experimental Biology, 2021
ABSTRACTPrevious studies have shown that marine stingrays have the anatomical and physiological basis for colour vision, with cone spectral sensitivity in the blue to green range of the visible spectrum. Behavioural studies on Glaucostegus typus also showed that blue and grey can be perceived and discriminated.
Vera Schluessel, Ingolf P. Rick, Friederike Donata Seifert, Christina Baumann, Wayne Iwan Lee Davies   +4 more
openaire   +2 more sources