All measurements were done for 3 minutes.

 

Red line = dissolved oxygen levels withouth goldfish

Green Line = dissolved oxygen with two goldfish

Blue Line = measurement of DO immediately following Run 2

 

 

View inside 600-mL beaker with two goldfish, dissolved oxygen probe, and temperature probe.  Beaker is sitting on a stir plate.

Measuring dissolved oxygen consumption by crayfish

Students using computer and probes to measure dissolved oxygen concentrations.

Laboratory measurement of oxygen consumption by crayfish and goldfish.

CCA Science