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ch 54
bio
24
Biology
Undergraduate 1
05/10/2016

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Term
age class
Definition
All the individuals of a specific age in a population.
Term
age-specific fecundity
Definition
The average number of female offspring produced by a female in a certain age class.
Term
age structure
Definition
The proportion of individuals in a population that are of each possible age.
Term
demography
Definition
The study of factors that determine the size and structure of populations through time.
Term
density dependent
Definition
In population ecology, referring to any characteristic that varies depending on population density.
Term
density independent
Definition
In population ecology, referring to any characteristic that does not vary with population density.
Term
emigration
Definition
The migration of individuals away from one population to other populations. Compare with immigration.
Term
exponential population growth
Definition
The accelerating increase in the size of a population that occurs when the growth rate is constant and density independent. Compare with logistic population growth.
Term
fecundity
Definition
The average number of female offspring produced by a single female in the course of her lifetime.
Term
fertility
Definition
The average number of surviving children that each woman has during her lifetime.
Term
generation
Definition
The average time between a mother's first offspring and her daughter's first offspring.
Term
immigration
Definition

The migration of individuals into a particular population from other populations. Compare with emigration.
Term
life history
Definition
The sequence of events in an individual's life from birth to reproduction to death, including how an individual allocates resources to growth, reproduction, and activities or structures that are related to survival.
Term
life table
Definition
A data set that summarizes the probability that an individual in a certain population will survive and reproduce in any given year over the course of its lifetime.
Term
logistic population growth
Definition
The density-dependent decrease in growth rate as population size approaches the carrying capacity. Compare with exponential population growth.
Term
metapopulation
Definition
A population made up of many small, physically isolated populations connected by migration.
Term
net reproductive rate
Definition
The growth rate of a population per generation; equivalent to the average number of female offspring that each female produces over her lifetime.
Term
poopulation density
Definition
The number of individuals of a population per unit area.
Term
population dynamics
Definition
Changes in the size and other characteristics of populations through time and space.
Term
population ecology
Definition
The study of how and why the number of individuals in a population changes over time and space.
Term
replacement rate
Definition
The number of offspring each female must produce over her entire life to "replace" herself and her mate, resulting in zero population growth. The actual number is slightly more than 2 because some offspring die before reproducing.
Term
survivorship
Definition

On average, the proportion of offspring that survive to a particular age.
Term
survivorship curve
Definition
A graph depicting the percentage of a population that survives to different ages.
Term
zero population growth
Definition
A state of stable population size due to fertility staying at the replacement rate for at least one generation.
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