Survivorship Curves

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6 Terms

1
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Survivorship Curve

shows relative survival rates from birth to max age

2
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Type 1

high survivorship (low mortality) in early (high parental care) & middle life (large size and defensive behavior)

rapid decline in survivorship (high mortality) in late life

species: K selected

ex: most mammals

3
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Type 2

constant survivorship / mortality rate

steadily decreasing survivorship throughout life

species: K selected

4
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Type 3

low survivorship (high mortality) in early life due to little to no parental care

few make it to midlife; slow, steady decline in survivorship in mid life

high survivorship (low mortality) for individuals who survive early life, slow decline in survivorship in old age

species: R selected

ex: insects, fish, plants

5
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Faster Drop in Line

quicker die-off of individuals

6
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Slower Drop in Line

longer average lifespan