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Do dugongs trade food for safety?

Do dugongs trade food for safety?. Can alteration of dugong behavior be quantified? How? Measuring food density Measuring dugong density Measuring risk. What is the role of tiger sharks as predators?. Scavenging vs. active predation Are tiger sharks the only (or main) predator?

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Do dugongs trade food for safety?

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  1. Do dugongs trade food for safety? • Can alteration of dugong behavior be quantified? How? • Measuring food density • Measuring dugong density • Measuring risk

  2. What is the role of tiger sharks as predators? • Scavenging vs. active predation • Are tiger sharks the only (or main) predator? • Few dugongs are known to be eaten – so why would one hypothesize evolution of predator avoidance?

  3. Shark abundance

  4. Dugong total abundance

  5. Dugong foraging & shark density Solid circles = deep, open circles = shallow for dugongs

  6. Which model best predicted density?

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