survivorship curve

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7 Terms

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survivorship curve

line that shows survival rate of a cohort in pop. from birth to death

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cohort

group of same aged individuals

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faster drop in line

quicker die-off of individuals

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slower drop in line

longer avg. lifespan

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Type I

mostly k selected, high survivorship in early life due to parental care, high survivorship due to large size and defensive behavior, rapid decrease in survivorship in late life bc of old age (mammals)

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Type II

steady decrease survivorship in life, between r and k

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type III

r-selected, high mortality rate early in life bc of no parental care, few make it to midlife, slow steady decline in midlife, very few make it to adulthood slow decline in survivorship in old age (insects, fish, plants)