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Ecology Chap 10
Population Growth
7
Biology
Undergraduate 4
10/26/2009

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Term
Intrinsic Rate of Increase (r)
Definition
The per capita rate of growth of a population that has reached a stable age distribution and is free of competition and other growth restraints; dN/dt = (b – d)N where (b - d) = r.
Term
Finite Rate of Increase (λ)
Definition
The proportional change in population size from one year to the next (λ = Nt+1/Nt); it represents the average number of offspring produced by an individual per generation
Term
Life Table
Definition
Tabulation of mortality and survivorship of a population; time-specific life tables are based on a cross section of a population at a given time; cohort life tables are based on a cohort followed throughout life.
Term
Time-Specific (Static) Life Table
Definition
A population sampled in some manner to obtain the distribution of age classes during a single time period; assumes age-specific mortality rates have been constant through time; survival is estimated by calculating the difference in proportion of individuals in succeeding age classes.
Term
Cohort (Dynamic) Life Table
Definition
Tabulation of age-specific mortality and survival estimated by following a group of individuals all born at the same time
Term
Net Reproductive Rate
Definition
Average number of female offspring produced by an average female during her lifetime.
Term
Stable Age Distribution
Definition
Constant proportion of individuals of various age classes in a population through population changes.
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