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[Front]

Population ________ refers to the rate at which the number of individuals in a population increases or decreases with time.

[Back]

growth

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Population ________ refers to the rate at which the number of individuals in a population increases or decreases with time.

Growth

A group of individuals born in the same period of time is called a(n) ________.

Cohort

A ________ curve plots the probability at birth of surviving to any given age (lx) against time or age class (x)

A survivorship curve

The net reproductive rate (R0) is equal to ________ when females, on average, replace themselves in a population.

The rate is equal to one

________ stochasticity is the random variation in birth and death rates that occurs in populations from year to year.

Demographic

________ stochasticity is the random variation in birth and death rates that occurs in populations from year to year as a result of natural disasters and annual variations in the environment.

Environmental

A population that is increasing in size has an intrinsic rate of population growth (r) that is:

> 0

A systematic compilation of mortality and survival data for a population is called a(n)

Life table

If survival rates do not vary with age, as in many species of perennial plants, reptiles, adult birds, and rodents, survivorship curves are typically

Type2

The number of births per female of age x is referred to as the

Age-specific birthrate

Overlevelses kurven deles i tre hovedtyper?

1: individerne har tendens til at udleve deres fysiologiske levetid. 2: dødeligheden og dermed overlevelse er konstant gennem alle aldre. 3: overlevelsesraten af de unge er lav.