The predator permanence model compares life history characteristics of amphibians living in temporary or permanent wetlands and wetlands with and without fish. Describe the selection pressures and resulting life history characteristics in temporary wetlands without fish and permanent wetlands with fish.

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Deanna HettingerLv2

6 Jun 2018

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1. Life history is clearly a different kind of trait than, say, tail length, body color, or tooth shape. Explain how natural selection can affect life history characteristics (and what count as/are examples of life history characteristics).

2. What are some of the tradeoffs involved in life history evolution? Provide and explain at least three different real examples. Which are microevolutionary, and which are macroevolutionary?

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b) Suppose half of the fish are harvested between ages 2 and 3 years. Which age of reproduction is now favored? what other effects do you think this would hvae on the population?

c) Compare this scenario to the effects of giving up migration. What information would you need to compute whether birds that spend the winter in cities will do better than those that continue to migrate?

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