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What can’t quadrats be used for
Assessing populations of moving animals
Why can’t quadrats be used for moving animals
Could count same animal more than once
First step of capture recapture
Number of individuals of particular species captured
Second step of capture recapture
Animals marked so they can be identified + released into habitat
Third step of capture recapture
Another sample captured, Marked individuals in second sample are same as original sample
Why does enough time have to have passed
The marked ones need to mix with rest of population
What can’t there be when capture recapturing
Immigration or emigration
What must capture recapture must not do
Affect survival chances of animal e.g. making it easier for predator to see them
What must the marking also not do
Affect chances of recapture
What determines the size of an animal population?
The capture recapture technique
What does the capture recapture technique do?
Determine size of animal population
Note 
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