do dugongs trade food for safety?
Post on 23-Feb-2016
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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? - PowerPoint PPT Presentation
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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? Few dugongs are known to be eaten –
so why would one hypothesize evolution of predator avoidance?
Shark abundance
Dugong total abundance
Dugong foraging & shark density
Solid circles = deep, open circles = shallow for dugongs
Which model best predicted density?
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