Population Ecology

AP Biology· difficulty 2/5

The displayed curve has very steep early mortality followed by stable survivorship.

Age log(survivors)

Which life history is consistent with the curve shown?

  • A

    Humans with extensive parental investment

  • B

    Elephants with long juvenile dependence

  • C

    Hydra with constant per-capita mortality

  • D

    Oysters releasing millions of larvae with no parental care

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Explanation

Type III survivorship is typical of organisms producing huge numbers of offspring with very high juvenile mortality and low parental investment, such as oysters and many fish.

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