# Topic 14 Flashcards

Life tables can be used to..

determine if a population grows from one generation to the next

Population growth models are used to..

estimate population size many generations in the future.

Imagine a closed population

- no immigration
- no emigration
- births increase population
- deaths decrease population

To determine a change in population size (N) from one point in time to sometime later =

N (later) = N(now) + Births - Deaths

Geometric model assumes..

discrete breeding

Geometric model

population only grows during the breeding season.

Average number of offspring left by an individual during one time interval

greek symbol upside down Y (same as R0)

Population increases by…

factor of upside down Y ^ of breeding interval

Exponential model assumes..

continuous breeding

Exponential model

population grows continuously through the year. population increases by factors of e^r

r =

= b - d

exponential growth rate of the population between time 0 and time t (not the same as R0)

e =

base of natural logarithm

Rate of change in a population size over a specific time person is equal to the..

average birth rate minus the average death rate multiplied by the number of individuals in the population at the start of the time period

dN/dt =

slope of population growth curve at a particular point in time

Rate of population growth directly effects the ..

size of the population (increased exponentially)