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Keywords: Potamotrygon motoro
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Journal Articles

The freshwater Amazonian stingray, Potamotrygon motoro , up-regulates glutamine synthetase activity and protein abundance, and accumulates glutamine when exposed to brackish (15‰) water

Y. K. Ip, A. M. Loong, B. Ching, G. H. Y. Tham, W. P. Wong, S. F. Chew
Journal: Journal of Experimental Biology
J Exp Biol (2009) 212 (23): 3828–3836.
https://doi.org/10.1242/jeb.034074
Published: 1 December 2009
...Y. K. Ip; A. M. Loong; B. Ching; G. H. Y. Tham; W. P. Wong; S. F. Chew SUMMARY This study aimed to examine whether the stenohaline freshwater stingray, Potamotrygon motoro , which lacks a functional ornithine—urea cycle, would up-regulate glutamine synthetase (GS) activity and protein abundance...
View article titled, The freshwater Amazonian stingray, <span class="search-highlight">Potamotrygon</span> <span class="search-highlight">motoro</span> , up-regulates glutamine synthetase activity and protein abundance, and accumulates glutamine when exposed to brackish (15‰) water
Open the PDF for The freshwater Amazonian stingray, <span class="search-highlight">Potamotrygon</span> <span class="search-highlight">motoro</span> , up-regulates glutamine synthetase activity and protein abundance, and accumulates glutamine when exposed to brackish (15‰) water in another window
Journal Articles

Metabolic organization of freshwater, euryhaline, and marine elasmobranchs: implications for the evolution of energy metabolism in sharks and rays

B. Speers-Roesch, Y. K. Ip, J. S. Ballantyne
Journal: Journal of Experimental Biology
J Exp Biol (2006) 209 (13): 2495–2508.
https://doi.org/10.1242/jeb.02294
Published: 1 July 2006
... as well as maximal activities of enzymes of intermediary metabolism in tissues from marine and freshwater elasmobranchs,including: the river stingray Potamotrygon motoro (<1 mmol l –1 plasma urea); the marine stingray Taeniura lymma , and the marine shark Chiloscyllium punctatum (>300 mmol l –1...
View article titled, Metabolic organization of freshwater, euryhaline, and marine elasmobranchs: implications for the evolution of energy metabolism in sharks and rays
Open the PDF for Metabolic organization of freshwater, euryhaline, and marine elasmobranchs: implications for the evolution of energy metabolism in sharks and rays in another window
Journal Articles

The osmotic response of the Asian freshwater stingray ( Himantura signifer ) to increased salinity: a comparison with marine ( Taeniura lymma ) and Amazonian freshwater ( Potamotrygon motoro )stingrays

Wai L. Tam, Wai P. Wong, Ai M. Loong, Kum C. Hiong, Shit F. Chew, James S. Ballantyne, Yuen K. Ip
Journal: Journal of Experimental Biology
J Exp Biol (2003) 206 (17): 2931–2940.
https://doi.org/10.1242/jeb.00510
Published: 1 September 2003
... the South American freshwater stingray Potamotrygon motoro, H. signifer has a functional ornithine-urea cycle (OUC) in the liver, with hepatic carbamoylphosphate synthetase III (CPS III) and glutamine synthetase (GS) activities lower than those of the marine blue-spotted fan tail ray Taeniura lymma . More...
View article titled, The osmotic response of the Asian freshwater stingray ( Himantura signifer ) to increased salinity: a comparison with marine ( Taeniura lymma ) and Amazonian freshwater ( <span class="search-highlight">Potamotrygon</span> <span class="search-highlight">motoro</span> )stingrays
Open the PDF for The osmotic response of the Asian freshwater stingray ( Himantura signifer ) to increased salinity: a comparison with marine ( Taeniura lymma ) and Amazonian freshwater ( <span class="search-highlight">Potamotrygon</span> <span class="search-highlight">motoro</span> )stingrays in another window