PEOPLE/POPULATION
& DEMOGRAPHY
HUSHLEY R. RENON
Faculty, CAS-DMNS
CARRYING CAPACIT Y
• the number of individuals of a species
that can survive in that area over time.
• four broad categories of factors that
determine the carrying capacity for a
population:
1.Availability of raw materials.
2.Availability of energy.
3.Accumulation of waste products and
mean of disposal.
4.Interactions among organisms.
POPULATION
CHARACTERISTICS
POPULAT ION
-a group of individuals of the same species inhabiting an
area.
-characteristic of a population are:
1.Natality
2.Mortality
3.Sex ratio
4.Age distribution
5.Growth rates
6.Special distribution
NAT ALIT Y or BIRT H RAT E
• refers to the number of individuals added to the
population through reproduction. It is the number
of individuals born per one thousand individuals in
the population per year
• it is expressed in this equation:
MORT ALIT Y or DEAT H RAT E
• the number of deaths per year. It is usually
discussed in terms of the number of individuals who
die per one thousand individuals in the population
per year.
POPULAT ION AGE DIST RIBUT ION
• the individuals of different age groups in a population.
• Bodenhelmer (1938) recognizes three ecological ages as:
Pre reproductive
Reproductive
Post reproductive
BIOT IC POT ENT IAL
• maximun reproductive power
SEX /GENDER RAT IO
• the number of males relative to the
number of females in the population.
HUMAN POPULATION
ISSUES
HUMAN POPULATION
ISSUES
CAUSES OF
POPULATION GROWTH
Biological Reason
CAUSES OF
POPULATION GROWTH
Biological Reason
CAUSES OF
POPULATION GROWTH
Population & Standard of Living
CAUSES OF
POPULATION GROWTH
Population Explosion-Family W elfare Program
THANK YOU