Results 161 to 170 of about 1,299 (195)

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
exaly   +7 more sources

Some of the next articles are maybe not open access.

Related searches:

Predicting and contextualizing sensitivity to overfishing in Neotropical freshwater stingrays (Chondrichthyes: Potamotrygonidae)

Reviews in Fish Biology and Fisheries, 2022
Neotropical freshwater stingrays (Potamotrygonidae) are conspicuous components of the South American ichthyofauna, and may be regionally important as an economic resource. The smallest individuals are exploited in ornamental fisheries, while large individuals are caught in consumptive fisheries for their meat or liver oil.
Luis O. Lucifora, Pablo A. Scarabotti, Santiago A. Barbini   +2 more
openaire   +2 more sources

Stingers in a strange land: South American freshwater stingrays (Potamotrygonidae) in Singapore

Biological Invasions, 2009
South American freshwater stingrays of the family Potamotrygonidae have long been popular worldwide as ornamentals in the aquarium trade. Despite this, there have so far not been any reported cases of their establishment elsewhere in the world. Here, we document the ocellate river stingray, Potamotrygon motoro, as having established itself in Singapore.
Heok Hee Ng, Tan Heok Hui, Darren C J Yeo   +2 more
exaly   +2 more sources

Systematic implications of brain morphology in potamotrygonidae (Chondrichthyes: Myliobatiformes)

Journal of Morphology, 2015
ABSTRACTThe gross brain morphology, brain proportions, and position of cranial nerves in all four genera (Potamotrygon, Plesiotrygon, Paratrygon, and Heliotrygon) and 11 of the species of the Neotropical stingray family Potamotrygonidae were studied to provide new characters that may have a bearing on internal potamotrygonid systematics.
João Pedro, Fontenelle, Marcelo R, de Carvalho   +1 more
openaire   +2 more sources

A taxonomic and morphological redescription of Potamotrygon falkneri Castex & Maciel, 1963 (Chondrichthyes: Myliobatiformes: Potamotrygonidae) [PDF]

Neotropical Ichthyology, 2011
A taxonomic revision of two nominal species of freshwater stingrays of the genus Potamotrygon previously considered valid, Potamotrygon falkneri Castex & Maciel, 1963 and Potamotrygon castexi Castello & Yagolkowski, 1969, was conducted based on a detailed analysis of external and internal morphology, including a morphometric and meristic study ...
Marcelo R De Carvalho
exaly   +5 more sources

Morphology and Morphometry of the Ovaries and Uteri of the Amazonian Freshwater Stingrays (Potamotrygonidae: Elasmobranchii)

The Anatomical Record, 2016
ABSTRACTThe reproductive biology of South American freshwater stingrays (family Potamotrygonidae) is still poorly studied compared to other marine species. In the present study, we examined the gross anatomy and histology of six species of potamotrygonids from the Amazon basin and described the structural asymmetry of the ovaries and their relationship
Maria Isabel, da Silva, Maria Inês Braga, de Oliveira, Oscar Tadeu Ferreira, da Costa, Wallice Paxiúba, Duncan   +3 more
openaire   +2 more sources

Functional Morphology of the Gill in Amazonian Freshwater Stingrays (Chondrichthyes: Potamotrygonidae): Implications for Adaptation to Freshwater

Physiological and Biochemical Zoology, 2010
The gill morphologies of six species of potamotrygonid freshwater stingrays from the Amazon basin were investigated using light and electron microscopy. Some unique features were found in the potamotrygonid gill: (1) fingerlike protuberances on the gill filament, (2) an Alcian blue/periodic acid-Schiff-positive histochemical reaction for several cell ...
Wallice Paxiúba, Duncan, Oscar Tadeu Ferreira, da Costa, Marise Margareth, Sakuragui, Marisa Narciso, Fernandes   +3 more
openaire   +2 more sources

Systematics and morphology of Potamotrygon orbignyi (Castelnau, 1855) and allied forms (Chondrichthyes: Myliobatiformes: Potamotrygonidae)

Zootaxa, 2015
The Neotropical freshwater stingray Potamotrygom orbignyi (Castelnau, 1855), and other similar "reticulated" species occurring in northern South American basins, were submitted to a thorough taxonomic analysis based on an extensive external and internal morphological study. The identity of P.
João Paulo C B Da, Silva, Marcelo R De, Carvalho   +1 more
openaire   +2 more sources

Plesiotrygon iwamae, a New Genus and Species of Neotropical Freshwater Stingray (Chondrichthyes: Potamotrygonidae)

Copeia, 1987
A new genus and species of neotropical freshwater stingray are described from the upper and mid-Amazon drainage, in Ecuador and Brazil (Rio Napo and Rio Solimbes). The new taxa are characterized by a long filiform tail, reduced eyes, and low number of pectoral-fin radials.
Ricardo S. Rosa, Hugo P. Castello, Thomas B. Thorson   +2 more
openaire   +1 more source

Chromosomes of three freshwater stingrays (Rajiformes Potamotrygonidae) from the Rio Negro basin, Amazon, Brazil

Genetica, 2006
Potamotrygonidae is the representative family of South American freshwater elasmobranchs. It is a monophyletic group containing 20 species grouped into three genera. Three species belonging to two genera of this family were collected from the middle Negro River, Amazonas, Brazil, and studied cytogenetically: Paratrygon aiereba, Potamotrygon motoro and ...
Valentim, Francisco Carlos Souza de, Falcão, José das Neves, Porto, Jorge Ivan Rebelo, Feldberg, Eliana   +3 more
openaire   +3 more sources