I want to measure metabolism in tardigrades (a jar of 30 tardigrades). I know that an easy way to measure metabolism is heat loss; I can just measure the temperature of the water before and after a certain period of time and take the difference. I have a few questions:
1) Is this a viable way?
2) Do I need to put the tardigrades in a controlled system (or is the outside environment a constant)?
3) Will the measurements be really really small (so I would need a very precise thermometer?)
4) How long should I wait between the two measurements?