State assumptions, and two precautions, which are taken into account while using this capture recapture method in estimating population size

Assumptions

• The organisms are randomly distributed
• The organisms do not show sudden changes in population size due to migration, immigration or emigration
• Negligible predation
• Marks are permanent during the study period
• Marks do not affect distribution of organism

Precautions

• Sampling is random
• Relative large samples is used