19.5 - Investigating populations

• 3 investigation methods use to estimate population size ?

  Randomly placed quadrats, quadrats along a belt transect, mark-release-recapture method
• 6 assumptions made when using the mark-release-recapture method ?

  • The sample is representative of the whole population
  • Marked individuals distribute themselves evenly
  • Population is closed
  • Few/no deaths or births
  • Marking method isn’t toxic or makes the individual more liable to predation
  • The mark isn’t rubbed off