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| martyn |
 Posted: Fri Sep 28, 2007 8:47 am Post subject: experiment |
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Forum Freshman
Joined: 01 May 2007
Posts: 9
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Hi everyone we have to design and carry out an experiment on
do fish attack groups of daphnia or just individuals ?
we are provided with 5 fish , 5 tanks, tank dividers, boiling tubes, a sieve, pipettes and stop watchers.
IF it was you how would you do this what would be the best way to set and carry this out experiment out any ideas welcome .
Thank you. |
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| LeavingQuietly |
| Posted: Sat Sep 29, 2007 2:01 am Post subject: |
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Forum Ph.D.
Joined: 20 Sep 2006
Posts: 793
Location: Press my 'WWW' button
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If you compare the temperature of the fish loads of times, you will see the difference of their heat per time, if you also have a beeper on each fish (water resistant) the experiment would get really simple; if they release more heat on smaller areas, then it is obvious.
If you had a fed fish first, you would see time between heat radiation and feeding.
Alternatively, measure the surface level, since eaten daphnia and non-eaten should have different density. Though that would be pretty advanced, given the variations.
Instead, look at the snapping waves and position of the fish, that should also do the trick.
If the daphnia got radioactive, a map of the daphnia could be produced, might be the simplest way.
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