Forsyth Ocean
What is the dependent and independent variable in this experiment?
Shrimp fishing off the coast to Georgia was closed in 2001 due to a drastic reduction in the shrimp population. Captain Forsyth, a local shrimper, suspects that increased salinity has killed the shrimp larvae. Three years of drought and greatly reduced freshwater flow from underground aquifiers resulted in increased salinity in the coastal estuaries. These habitats between open ocean and fresh water are the "nurseries" for many marine animals.
So, Cindy ....
you set up tanks of shrimp larvae in different strengths of brine and measure the survival rate of the larvae after a fixed time.
Independent variable - the strengths of the salt solutions
Dependent variable - the survival rate of the larvae
Controls - tank size, temperature, aeration of the tanks, number of larvae added, length of time before counting survival rates etc etc.
John H
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