Osmoregulation in FW rays (and bull sharks?) - need some scientific info!

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loconorc

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Sep 11, 2007
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Hey all, I'm doing a 12th grade bio project on the osmoregulation of Potamotrygon rays and, if I have time and can fit it in, bull sharks in the Amazon as well. I have a good chunk of my background info planned out, but I am required to have some form of quantitative, numerical data to support my research. I could use any and all of the following, in the form of books, websites, or formal papers:
- Concentrations of urea or the enzyme trimethylamine oxide (TMAO) within the body
- Internal osmotic concentrations vs. the outside environment, or vs. marine elasmobranchs
- Sodium or chloride elimination via rectal glands in marine elasmobranchs or marine bony fish
Any information relating to bull sharks, Atlantic rays, other FW rays, or marine elasmobranchs is very likely still applicable.
Any and all info is welcome and very much appreciated, and thanks!
 
you need to talk to zoodiver.but i doubt their is any data that you need about amazon rays
 
to find any good scientific papers like the ones oddball beat me to posting, just use google to search only scholarly papers. you can find the scholar only search under more options much like you would video or pics.

there are loads of papers on bull sharks and potamtrygonidae specific to what you want.
 
Thanks guys, I sent Zoodiver a PM a few days ago, but I haven't had internet access till now. Anything else would be appreciated but I think I've got enough for the time being :)
 
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