experiment design help - (Sep/28/2007 )

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.

How , using the equipmnt provided can you set and carry the experiment out and what statistics would you be able to use ?

Any ideas welcome

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a question, do daphnia naturally form a group or will the individuals spread out evenly across the tank.

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I was thinking dividing each tank with the fish on one side and a load of daphnia on the other and timing how long it takes for an attack but im not sure how to represent the results and anylize then them statisticly.

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The number of fish is a side project of your main question, so I would start with 1 fish per tank (5 tanks);

start with 1 Daphnia per tank and stopp time of devouring after abandonment;

increase number of Daphnia stepwise and stopp time again; I do not know if Daphnia build swarms but it is likely;

if fish only attackgroups/swarms of Daphnia, you should obtain a sigmoidal increase of attackIdevouring per number of Daphnia

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Thanks mate , How would i show my results i am not sure how to design the graph what should go on the axis etc ? How can i statistly anylize the results ?

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