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A life table is a record of survival and reproductive rates in a population, broken out by age, size, or developmental stage (e.g., egg, hatchling, juvenile, adult).
Life tables, survivorship, & age-sex structure. Life history strategies and fecundity. Life history strategies. Population ecology. Science>. Biology archive>. Ecology>. Intro to population ecology.
Life tables, which describe how the risk of death (and sometimes fertility) changes with age, are a fundamental tool for describing and exploring the diversity of life histories. Numerous important life history metrics can be derived from them.
A life table is an age-specific summary of mortality rates operating on a cohort of individuals first developed by human demographers and introduced to ecologists by Raymond Pearl in 1921. The mortality schedule is generally calculated based on the known number of survivors in each age class.
An Introduction to Ecology. Population Ecology II: Life tables. Two types of life table. Cohort (or dynamic) life table: follow all offspring born at a given time (the cohort) from birth until the death of the last individual. This is the preferred way to generate a life table.
Life tables follow the fate of a group of individuals all born within the same population in the same year. Of this group, or cohort, only a certain number of individuals will reach each age, and there is an age above which no individuals ever survive.
• explain the notations behind a typical life table with a distinction on ‘current life table’ and ‘cohort life table’; • discuss the concepts of ‘curtate expectation of life’ and ‘central death
