wild life breeding Flashcards
metapopulation?
series of population connected byindividuals
population density
measure of number of individuals in a given area
distribution of a population
spatial arrangement of population members
three distinct distribution
1 random distribution
2uniform
3clumbed
random distribution
individuals scattered
**resources scatteresd evenly
uniform or even distribution
strong competition for limited resource
clumped distribution
resources are patchy
strong social bonds
clumped distribution
resources are patchy
strong social bonds
limiting factors in a population
density dependant
***density independant
density dependant
affects same proportion of individuals
***forest fire
storms
density dependant factors
*****diseases
predation
size increases this also increases
population dynamics
short term and long term changes in size and structure of a population
major factors affecting population dynamics
natality
mortality
emigrations
immigrations
population dynamics is calculated by
Nt =No+B-D+I-E
population cycle
population of some species show regular increase and decrease
population cycle
population of some species show regular increase and decrease
population cycle example
population cycle of snowshoe hare and lynx population
carrying capacity
number of animals thaat a habitata can support over a sustainable period
harvestable surplus
portion of population that can be removed without affecting the population sustainability
ideal population
a population in which male gametes have equalchance to meet female gamete
migration and selection excluded
minimum viable population
minimum population size needed to maintain genetic variation
dispersion
affects population size
2 types of dispersal common in wild animals
natal dispersion
individuals moves out for breeding purpose
seen in males than females
innate dispersal
genetically predisposed for dispersion