This is an R Notebook to help visualize the results of your dilution experiments. Pretty cool huh?

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Set up Notebook

#Part I PLOT THE MOVEMENT PATTERN

Questions:

  1. In what direction is the animal traveling (Red to yellow to Blue)? The fur seals are travelling north then further south passing their starting point.
  2. Why do you think it is traveling in this direction? My best guess would be that they traveled for breeding season then traveled back down to their normal habitat
  3. Why do these animals travel/migrate? Possibly for safer breeding grounds for their young. Either for more abundance in food or protection from predators.
  4. Why is the animal in this area? Seals need land to survive meaning they must live near a coast of some kind to take breaks when not swimming.
  5. Is there much human activity in this area? It would appear not as they seem relatively undisturbed. Points indicate that they did rest and did not go into deeper waters.

#Part II Find deepest dive

  1. The atmospheric pressure (atm) exerted upon us at sea level is about 14.7 lbs/square inch (760mm Hg). When a person dives the pressure exerted by the water increases by 1atm for each 10 meters the person goes down. What is the approximate pressure exerted at that the average diving depth? Deepest depth? (Look at the table above for ‘deepest_dive’ or ‘average_dive’ to find the depths.)

The average pressure exerted at average diving depth is 9.85atm, meanwhile the average pressure for the deepest dive was 44.6atm. #Part III. Plot the locations of the dives over 100 meters 7. Is there a pattern to the locations of deep dives >400 meters (Green triangle)? Thoughts on why?

Yes, most deep dives lay around the middle or upper coast of data points. I believe that this is due to finding mates/mating practices. As well as looking for food once the new generation is born. #Part IV What are the diving patterns?

  1. What average percent of time does the animal spend at the surface? 41.9%
  2. Does the animal spend more time diving or at the surface? (Look at table for comparison) The animal spends slightly more time diving than at the surface.
  3. Are the locations where the animal spends most time diving (Orange triangle) the same or different from the most time at the surface (Grey triangle)? Why do you think this? They spend most time diving perhaps in the middle of their migration because they are near the orange triangle locations simply for transport. Meanwhile the grey triangles at the top would make sense for breeding grounds because they need to have surface births/ find mates.

#Find the percent of dives made a specific depth ranges (0-100 meters, 100-400 meters, >400 meters.

Percent Dives
<100 meters 66.53
100-400 meters 33.31
>400 meters 0.16

#Part V. Plot the dive profiles over time 11. Is there a specific time of day, or range of times, when it made its deepest dives? Why or why not do you think? The seals seem to dive the deepest at 9pm each day. I think this is because as night approaches there’s is less likely to be food towards the surface of the water. Meaning the seals have to do deeper dives to forage for food. They also seem to have deep dives every other day.

  1. What time of day are they making these deep dives? How many dives per day? These deep dives are happening at night and usally happen once every other day either at 9am or 9pm. #Part VI. Do some quick research about your species.
  2. What do they like to forage on? Do males or females forage more?

The Australian fur seal like to eat bony fish and even octopus when available. From what I read both male and females forage for food during dives, the difference lies int he depths. The male seals have deeper and longer dives while lactating female seals have shorter and less deep dives.