scholarly journals Shearing overbite and asymmetrical jaw motions facilitate food breakdown in a freshwater stingray, Potamotrygon motoro

2019 ◽  
Vol 222 (13) ◽  
pp. jeb197681 ◽  
Author(s):  
J. D. Laurence-Chasen ◽  
Jason B. Ramsay ◽  
Elizabeth L. Brainerd
Keyword(s):  
Freshwater Stingray

Pendrin immunoreactivity in the gill epithelium of a euryhaline elasmobranch

2002 ◽  
Vol 283 (4) ◽  
pp. R983-R992 ◽  
Author(s):  
Peter M. Piermarini ◽  
Jill W. Verlander ◽  
Ines E. Royaux ◽  
David H. Evans
Keyword(s):  
Collecting Duct ◽  
Apical Region ◽  
Intercalated Cells ◽  
Cortical Collecting Duct ◽  
Gill Epithelium ◽  
Dasyatis Sabina ◽  
Proton Atpase ◽  
Atlantic Stingray ◽  
Freshwater Stingray ◽  
Gill Lamellae

Pendrin is an anion exchanger in the cortical collecting duct of the mammalian nephron that appears to mediate apical Cl−/HCO[Formula: see text]exchange in bicarbonate-secreting intercalated cells. The goals of this study were to determine 1) if pendrin immunoreactivity was present in the gills of a euryhaline elasmobranch (Atlantic stingray, Dasyatis sabina), and 2) if branchial pendrin immunoreactivity was influenced by environmental salinity. Immunoblots detected pendrin immunoreactivity in Atlantic stingray gills; pendrin immunoreactivity was greatest in freshwater stingrays compared with freshwater stingrays acclimated to seawater (seawater acclimated) and marine stingrays. Using immunohistochemistry, pendrin-positive cells were detected on both gill lamellae and interlamellar regions of freshwater stingrays but were more restricted to interlamellar regions in seawater-acclimated and marine stingray gills. Pendrin immunolabeling in freshwater stingray gills was more apical, discrete, and intense compared with seawater-acclimated and marine stingrays. Regardless of salinity, pendrin immunoreactivity occurred on the apical region of cells rich with basolateral vacuolar-proton-ATPase, and not in Na+-K+-ATPase-rich cells. We suggest that a pendrin-like transporter may contribute to apical Cl−/HCO[Formula: see text] exchange in gills of Atlantic stingrays from both freshwater and marine environments.

Trophic ecology and metabolism of two species of nonnative freshwater stingray (Chondrichthyes: Potamotrygonidae)

Hydrobiologia ◽  
2020 ◽  
Vol 847 (13) ◽  
pp. 2895-2908
Author(s):  
Cibele Diogo Pagliarini ◽  
Cristiéle da Silva Ribeiro ◽  
Lucas Spada ◽  
Rosilene Luciana Delariva ◽  
Jumma Miranda Araújo Chagas ◽  
...  
Keyword(s):  
Trophic Ecology ◽  
Freshwater Stingray

scholarly journals Hallux amputation after a freshwater stingray injury in the Brazilian Amazon

2016 ◽  
Vol 49 (3) ◽  
pp. 389-392 ◽  
Author(s):  
Wuelton Marcelo Monteiro ◽  
Sâmella Silva de Oliveira ◽  
Jacqueline de Almeida Gonçalves Sachett ◽  
Iran Mendonça da Silva ◽  
Luiz Carlos de Lima Ferreira ◽  
...  
Keyword(s):  
Brazilian Amazon ◽  
Freshwater Stingray

Phylogeography, genetic diversity and population structure of the freshwater stingray, Paratrygon aiereba (Müller & Henle, 1841) (Myliobatiformes: Potamotrygonidae) in the Colombian Amazon and Orinoco basins

2020 ◽  
pp. 1-14
Author(s):  
Maira A. Rizo-Fuentes ◽  
Camilo A. Correa-Cárdenas ◽  
Carlos A. Lasso ◽  
Mónica A. Morales-Betancourt ◽  
Dalia C. Barragán-Barrera ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Freshwater Stingray ◽  
Colombian Amazon

scholarly journals Nuclear-follower foraging associations among Characiformes fishes and Potamotrygonidae rays in clean waters environments of Teles Pires and Xingu rivers basins, Midwest Brazil

2011 ◽  
Vol 11 (4) ◽  
pp. 359-362 ◽  
Author(s):  
Domingos Garrone Neto ◽  
Lucélia Nobre Carvalho
Keyword(s):  
Freshwater Fish ◽  
The Other ◽  
Teleost Fishes ◽  
Freshwater Stingray ◽  
New Interactions ◽  
Foraging Associations ◽  
Commensal Relationship

During under and overwater observations were recorded nuclear-follower foraging associations among three species of characiform fishes - Chalceus epakros, Hemiodus semitaeniatus and Hemiodus unimaculatus - and a freshwater stingray species - Potamotrygon orbignyi - in the Teles Pires and Xingu rivers basins, Midwest Brazil. The teleost fishes were observed closely following the stingrays during the behavior of stirring the substrate to uncover invertebrates, which cause discrete sediment clouds. Apparently this sediment perturbation attracts the fishes that approached the foraging stingrays to feed on small preys and other food types exposed this way. This is a typical example of a commensal relationship in which one participant is benefited while the other is unaffected, and represents the second published record of nuclear-follower feeding association between potamotrygonid rays and teleost fishes, demonstrating the potential of naturalistic studies in discovering new interactions involving species of freshwater fish.

Histology of the digestive tract of the freshwater stingray Himantura signifer Compagno and Roberts, 1982 (Elasmobranchii, Dasyatidae)

2006 ◽  
Vol 211 (5) ◽  
pp. 507-518 ◽  
Author(s):  
Kannika Chatchavalvanich ◽  
Ricardo Marcos ◽  
Jintana Poonpirom ◽  
Amara Thongpan ◽  
Eduardo Rocha
Keyword(s):  
Digestive Tract ◽  
Freshwater Stingray ◽  
Himantura Signifer
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