PT155.S1.Q3 > Question

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SECTION 2 · lr

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SECTION 4 · lr

Why do healthy gazelles "stot" by leaping into the air when they see predators, rather than running away under cover like they do when frightened by vehicles?

The correct answer will be a hypothesis that explains the stotting behavior. Stotting must afford gazelles some advantage despite its apparent downsides, so this explanation must provide some rationale for the unusual behavior. This rationale will likely have to do with how predators react to stotting.

Stotting does appear irrational, but just because it appears irrational doesn't mean it necessarily is. Either way, saying it looks irrational doesn't help us explain the behavior.

We’re concerned with healthy gazelles. We need to explain why they stot when they’re startled by predators, and saying that unhealthy gazelles also stot doesn't help us with that.

Lions would prefer not to chase strong, agile gazelles given the risk of failure. Stotting signals a gazelle is strong and agile, hence why gazelles bother with the energy-consuming display. This explains the behavior.

If this were true, it would certainly make more sense for gazelles to simply run away before being noticed. We need to know why they bother with stotting at all, and this doesn't get us any closer to knowing.

Knowing more about lions' hunting behavior might be useful if we could understand where stotting fit in, but this doesn't give us enough information. We're still equally confused about stotting.

PrepTest 155 - Section 1 - Question 3

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