Cedar: What do you use to measure the salinity of the water?
Interview of Gavin by Cedar, September, 1996
Cedar: Gavin, why did you choose to go out to Pedder Bay?
Gavin: We went to learn how to use different tools to measure the abiotic factors in the bay.
Cedar: What exactly are abiotic factors?
Gavin: These are the physical factors which affect the ecosystem. For instance, the salinity of the water at different depths.
Cedar: What do you use to measure the salinity of the water?
Gavin: We used a salinometer connected to a probe which we lowered into the water.
Cedar: How do you measure the other abiotic factors and what tools do you use?
Gavin:
To measure turbidity we use the secchi disc which is basically
a 50cm diameter disc with lead weights attached. We lower the
disk until it was just out of sight , bring it back into view
and average the distance to estimate the point where it disappears.
The disk is raised and measurements taken.
To measure pH we first take a sample using a water sampler , 
then use a portable pH meter to measure the ph from different depths.