Unit 5 Flashcards
CBR
CRUDE BIRTH RATE
TFR
TOTAL FERTILITY RATE
IMR
INFANT MORTALITY RATE
Replacement-level fertility
average number of children couple needs to have to replace themselves (2.1 for most countries)
Demographic transition
Study of people’s transition (change) over time
Population age structure
Pre-reproductive (0-14)
Reproductive (15-44)
Post reproductive (45 and up)
Population momentum
consequence of the demographic transition. Population momentum explains why a population will continue to grow even if the fertility rate declines
Life expectancy
An indication of how long a person can expect to live, it is the number of years of life remaining to a person, at a particular age
Ecological footprint
A measure of the amount of biologically productive land and water area an individual, a population or an activity occupies, given prevailing technology.
Demography
the number of people that can be supported given the resources of an area and the way people living in this area use these resource.
Biotic potential
(maximum growth of a
population under optimal
conditions)
maximum growth rate of a population under ideal conditions, with unlimited resources and without any growth restrictions
Fecundity
Female egg production: To estimate population size Informs life history traits, which indicate potential response to fishing.
Age Structure pyramids
the distribution of people of various ages.
Survivorship curves
Types 1-3
- Type I survivorship exhibit high survivorship throughout their life cycle.
- Type II survivorship have a constant proportion of individuals dying over time.
- Type III survivorship have very high mortality at young ages.
Reproductive strategies
K vs r
- r represents the slope of the line representing exponential growth
- K represents the carrying capacity of a habitat for members of a given sort of organism.