3. Demography Flashcards
What happens when population controls are balanced
Static state
What questions do we ask about mortality?
Is mortality high among juveniles,
Do older organisms have a higher mortality
How can the mortality schedule be shown?
Life table
What is a cohort life table?
an age specific summary of the mortality ranges, used for short lived organisms
What is a static life table?
An age specific summary of mortality rates, estimated from a cross section, snap shot of population
How do we get per capita death rate?
No of deaths divided by population risk
What is a survivorship curve?
Graph that can show data from life tables
What is type 1 survivorship curve?
Low per capita mortality, except in old age
What is type 2 survivorship curve?
Constant per capita mortality, independent of age, e.g birds
What is type 3 survivorship curve?
High per capita mortality early in life, parasites and fish
what does r mean
Intrinsic valur fr
for increase in number
what is an example of a species that produces parthenogenetically
aphids
what are the two mian scales of growth in graphs?
Logarithmic and arithmrtif
How does the little r varies?
each species will gace idfferent litttle are with a different benefit
what control the growth of the population
Multiplication rate
