Results 71 to 80 of about 252,570 (105)

Exceptional concentration of fish diversity in Yasuní National Park, Ecuador (Napo River Basin). [PDF]

Biodivers Data J
Escobar-Camacho D, Valdiviezo-Rivera J, Carrillo-Moreno C, Argüello P, Swing K.   +4 more
europepmc   +1 more source

Ecomorfology and intra-specific variation in the morphology of Potamotrygon falkneri and Potamotrygon motoro (Chondrichthyes-Potamotrygonidae) in the upper Paraná river and its foodplain, Brazil.

, 2009
Potamotrygonidae comprises the only group of fish with cartilaginous skeletons that has adaptations to live exclusively in fresh water. The family is widely distributed in South American rivers that drain towards the Atlantic and has great richness, with
Lonardoni, Alessandra Pasian
core  

Proposal of Troglocephalinae n. subfam. (Monogenea: Monocotylidae) to accommodate existing and two new monocotylids from the gills of rhinopristiform shovelnose rays. [PDF]

Syst Parasitol
Vaughan DB, Hansen H, Chisholm LA.
europepmc   +1 more source

RENDIMENTO DO FILÉ DE ARRAIA (Potamotrygon motoro) CAPTURADA NO MUNICÍPIO DE SANTA QUITÉRIA, MARANHÃO, BRASIL

Aquicultura e Pesca: Adversidades e Resultados, 2019
A. Coelho, Elaine Cristina Batista dos Santos, Thalison da Costa Lima, J. Freitas, Isadora Líria Nunes de Alencar, Jackellynne Fernanda Farias Fernandes, D. Viana   +6 more
semanticscholar   +1 more source

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Mitochondrial DNA diversity and population structure of the ocellate freshwater stingray Potamotrygon motoro (Müller & Henle, 1841) (Myliobatiformes: Potamotrygonidae) in the Colombian Amazon and Orinoco Basins

Mitochondrial DNA Part A: DNA Mapping, Sequencing, and Analysis, 2019
The lack of clarity regarding the taxonomy of the ocellate river stingray (Potamotrygon motoro) and the absence of previous studies regarding its genetic diversity and population structure makes this species vulnerable to overexploitation, being now the ...
Mónica A Morales-Betancourt, Carlos A. Lasso, Susana Caballero   +2 more
exaly   +2 more sources

Chromosomal and molecular perspectives on Potamotrygon motoro (Müller & Henle, 1841) from central Amazon

Genome
Cytogenetic studies on Potamotrygon motoro (Müller & Henle, 1841) are limited to classical cytogenetic techniques, but they do reveal great karyotypic variation.
Eliana Feldberg, Patrik F Viana, Alex Ferreira   +2 more
exaly   +2 more sources

Integrative taxonomy suggests that South American freshwater nematodes Echinocephalus and their host stingrays co-originated in late Oligocene to early Miocene

Journal of Helminthology, 2022
Nematoda of the genus Echinocephalus Molin, 1858 include species from the Gnathostomatidae family, the adult stages of which parasitize the stomach and spiral intestine of elasmobranchs as their final hosts.
M. Müller, E. Adriano, M. S. B. Oliveira, L. Corrêa   +3 more
semanticscholar   +1 more source

Biological and biochemical properties of the Brazilian Potamotrygon stingrays: Potamotrygon cf. scobina and Potamotrygon gr. orbignyi.

Toxicon, 2006
Stingrays of the family Potamotrygonidae are widespread throughout river systems of South America that drain into the Atlantic Ocean. Some species are endemic to the most extreme freshwater environment of the Brazil and cause frequent accidents to humans.
Kharita W Magalhães, C. Lima, Ana Amélia Piran-Soares, E. E. Marques, C. Hiruma-Lima, M. Lopes-Ferreira   +5 more
semanticscholar   +2 more sources

Cross-reactivity between Potamotrygon motoro antivenoms and dorsal and stinger extracts of others stingrays (Chondrichthyes: Potamotrygonidae) from the Amazon basin

, 2019
In this study, two mouse hyperimmune sera were produced, one using extract from the stinger of the stingray Potamotrygon motoro and the other using extract from the dorsal region of the same species and their cross-reactivity with extracts from the ...
J. Lameiras, Valéria Mourão de Moura, L. C. Dias, Ilia Gilmara Carvalho dos Santos, Oscar Tadeu Ferreira da Costa, M. C. dos-Santos   +5 more
semanticscholar   +2 more sources

Sperm morphology, functionality, and cryopreservation challenges in wild Ocellate River stingrays Potamotrygon motoro.

Tissue & Cell
This study characterized the sperm morphology and morphometry of wild Ocellate River stingrays (Potamotrygon motoro) and evaluated the effects of cryopreservation on their structural integrity and functional viability.
Nathália dos Santos Teixeira, Jhony Lisbôa Benato, Rômulo Batista Rodrigues, E. Nicoleti, Larise Caroline Oliveira Lima, Louise Nex Spica, Lis Santos Marques, Lorrânny Pereira de Assis Valadares, Pedro Nacib Jorge-Neto, Jayme Aparecido Povh, Mônica Rodrigues Ferreira Machado, D. Streit   +11 more
semanticscholar   +1 more source