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Definition
| All the individuals of a specific age in a population. |
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Definition
| The average number of female offspring produced by a female in a certain age class. |
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Definition
| The proportion of individuals in a population that are of each possible age. |
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Definition
| The study of factors that determine the size and structure of populations through time. |
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Term
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Definition
| In population ecology, referring to any characteristic that varies depending on population density. |
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Definition
| In population ecology, referring to any characteristic that does not vary with population density. |
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Term
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Definition
| The migration of individuals away from one population to other populations. Compare with immigration. |
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Term
| exponential population growth |
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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. |
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Term
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Definition
| The average number of female offspring produced by a single female in the course of her lifetime. |
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Definition
| The average number of surviving children that each woman has during her lifetime. |
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Definition
| The average time between a mother's first offspring and her daughter's first offspring. |
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Term
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Definition
The migration of individuals into a particular population from other populations. Compare with emigration. |
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Term
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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. |
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Term
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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. |
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Term
| logistic population growth |
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Definition
| The density-dependent decrease in growth rate as population size approaches the carrying capacity. Compare with exponential population growth. |
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Term
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Definition
| A population made up of many small, physically isolated populations connected by migration. |
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Term
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Definition
| The growth rate of a population per generation; equivalent to the average number of female offspring that each female produces over her lifetime. |
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Term
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Definition
| The number of individuals of a population per unit area. |
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Term
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Definition
| Changes in the size and other characteristics of populations through time and space. |
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Term
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Definition
| The study of how and why the number of individuals in a population changes over time and space. |
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Term
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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. |
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Term
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Definition
On average, the proportion of offspring that survive to a particular age. |
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Term
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Definition
| A graph depicting the percentage of a population that survives to different ages. |
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Term
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Definition
| A state of stable population size due to fertility staying at the replacement rate for at least one generation. |
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