lecture 5

Question 1

Dilution Effect

Answer 1

More prey than predators so that when grouped together, there is only a dilution rather than a loss – like with schools of fish

Question 1

Selfish Herd

Answer 1

Grouping together to use each other as shields, trying to be in the center with the most protection and vigilant

Question 2

Confusion Effect

Answer 2

Mass group of prey makes it hard for predator to fixate on and pursue a single individual

ex: bird murmurations, zebra stripes in a heard

Question 3

Predator Inspection

Answer 3

Prey checking out predators for the group

Question 4

Stotting

Answer 4

Displaying prime age and energy by jumping, warns older weaker predators not to try (gazelle and cheetah)

Question 5

Mobbing

Answer 5

Swarming another animal

Question 6

Alarm Calling in Vervet Monkey

Answer 6

Will not call if the threat is a long-term, long-distance hunt (would be detected). Different for chimps, snakes, predatory birds because they require different responses (low/high)