mark release recapture

Question 1

How does this work?

Answer 1

= capture an intiial sample
= indivuals of sample are marked, and released back, count how much captured
= the marked are released and left to allow them to randomly disperse, throughout the habitat
= a second sample is captured, the number of those marked are taken
= size of populatio is estimated,

Question 2

What is the calculation needed?

Answer 2

= number of organisms intiailly vaught x nmber of organsism in second sample/ number of marked organisms recaptured

Question 3

What are the ethics?

Answer 3

= capturew and marking must not be harmful
= the mark needs to be non toxic, not increase chance of predation and not reduce chances of reprduction

Question 4

What are some assumptions that are being made?

Answer 4

= estimate may not be accurate
= population size is constant, (no death, birth migration)
= animals always redistribute evenly