UNDERSTANDING POPULATION

Ani Mardiastuti

Population

group of individuals belonging to the same species that inhabit a specific geographic location at a specific point in time

Memahami Populasi

Populasi ● species ● space ● time Spesies ●“definition” ● interbreeding Space ● boundary ● minimum size Time ● time limit/duration

Population

• A cluster of individuals with a high probability of mating with each other compared to their probability of mating with a member of some other population (Pianka 1983)

• All organisms involved in a gene pool: Mendelian population (demes)

• Mendelian population groups of organisms with a substantial amount of genetic exchange

Mendelian Population

● Based on gene pool

● All organism involved in a gene pool :

Mendelian population (demes)

● Concept of “space” in Mendelian population

● Classic population vs Mendelian population

● Habitat barrier in Mendelian populatian

concept

Barrier and Mendelian Population

Separate population?

How do we define a population?

How do we define a population?

How do we define a population?

Population Parameters

individual vs population Population parameters ● birth rates ● death rates ● age structures ● sex ratios ● gene frequencies ● genetic variability ● growth rates ● densities etc

Some Important Terminologies

● open vs closed population ● abundance ● population size ● dispersion ● natality ● mortality ● migration ● iteroparity vs semelparity ● fecundity (potential) vs fertility (actual) ● reproductive succes ● fitness ● density dependent vs density independent factors