Partial Pressure help

[James Hughes]

Does anyone know where I can get some results for the following experiment:
Water has been altered so that there are 6 samples of water each with a
different level of dissolved oxygen in. I then put fresh water snails into
these different samples of water to see if the length of time they stay
submerged was affected by the different partial pressure's.
Or results for any experiemtn that involves organsims and surfacing.
Thanks.

jimhughes at bigfoot.com