NANFA-- FW: Osmoregulation in freshwater sharks

Jay DeLong (
Thu, 17 Jan 2002 22:12:50 -0800

The message below is from a webpage visitor. I don't understand completely
what he is asking for, but maybe someone has some ideas or contacts for him.

Jay DeLong
Olympia, WA

-----Original Message----- From: Sent: Thursday, January 17, 2002 6:46 PM To: Subject: Osmoregulation in freshwater sharks

Hello my name is Jeremy Smiseth. I am a student at Rondout Valley Central School in New York. I am in a college course called Authentic Science Research. I have been studdying the topic of osmoregulation for quite sometime now. I am interested in the Bull Shark. As you may know it possesses the ability to move from saltwater to freshwater freely. I have come up with an original hypothesis. My thoughts are that Aggression is triggered by changing from a high concentration of salt to a lower concentration of salt. I beleive that the imbalance of salt can cause them to go into a frenzy. By changing from a low salinity to a high would cause the same effect. The disease Myelinolysis is caused by curing Hyponatremia at a rate higher than 10 mmol/l per a 24 hour period. Myelinolysis can cause dizziness and disoreantation. I think the salt concentration might have a similar effect in sharks.

If it wouldnt take so much time could you email me back a list of researchers that worked with you or you received information from to write the email. I would like to thank you for taking your time to read my email.

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