Hi class,
In the example of the bonefish using the crawl package, we saw that the fish went to a certain area at night, then moved to a certain spot near a mangrove island at 8:30 or so every morning, and then went to the lagoon (and elsewhere?) for the rest of the day before moving back to its night-time resting spot. How can we represent the area the fish goes to at night? One way (presented by Preissler et al. 2013) is by using ‘potential functions’. Some potential functions are shown Figure 2 from the paper. The Preissler paper and some ancillary files (“Preissler_Rcode_Example.txt” and “Attraction Surface.docx”) are in the Paper folder on the course UDrive.
We will look at the night-time velocity vector for our bonefish, and see if they let us define a potential surface that can constrain the night-time behavior of our bonefish. This is an example of attraction, but we can do the same process with a different potential function to define repulsion.
Jack