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#survivorship

3 public questions tagged with this topic.

Survivorship and rK Strategies

Which factor primarily affects survivorship patterns?

Survivorship describes the proportion of an original cohort that remains alive at successive ages, so it is shaped by age-specific mortality. Parental care can strongly alter that mortality by protecting eggs or young, provisioning food, and teaching avoidance behavior. Greater care commonly shifts deaths away from early life and produces the late-loss pattern associated with Type I curves, although many other environmental and genetic influences also matter. Life-history traits should be interpreted as correlated tendencies rather than rigid packages. Adult survival, juvenile mortality, body

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 12

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Survivorship and rK Strategies

Which of these is true for Type I curve species?

“High survival until old age” for which of these is true for type i curve species. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Life-history traits reflect allocation among growth, maintenance, survival, and reproduction. Energy invested in many offspring cannot simultaneously be invested in large offspring, prolonged care, or future breeding, creating measurable trade-offs. The remaining alternatives—“High early mortality”, “No parental care”, “Low reproductive investment”—refer to different s

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 12

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Survivorship and rK Strategies

Survivorship curves relate to:

“Mortality patterns” for survivorship curves relate to. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Selection favors the schedule that increases lifetime reproductive success under local mortality and resource conditions. Body size, development time, fecundity, parental investment, and generation length consequently tend to covary. The remaining alternatives—“Birth rates”, “Growth rates”, “Density”—refer to different states, processes, or scales and therefore do not express the same causal rel

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 12

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