3-dimensional interaction plot

 

The above plot demonstrates the kind of data our tags can record. The top graph displays a longer term depth plot (12 hours), the middle graph displays a shorter term depth plot (30 minutes) and the bottom section displays data from a predator-prey interaction over the course of two minutes. From the video, we see that the shark observed a turtle on the way up to the surface and followed it down. Approximately one minute later the turtle escaped. The colour of the line on the plot indicates the frequency of the tailbeats (so a higher number means a faster tailbeat), and indicates the shark slowed down to possibly stalk the turtle before speeding up for a potential attack. We hope to collect a lot more of this kind of data over the next year.