capture, release, recapture

Question 1

explain the procedure for capture, release, recapture
(5 marks)

Answer 1

1. capture as many individuals as you can and mark them in a way that won’t impact survival rate or increase predation
2. release
3. go to sample place and capture as many individuals as possible after leaving suitable time frame for individuals to evenly distribute
4. population size = number in first sample x number in second sample divided by the number of marked in second sample

Question 2

what is the equation for population size

Answer 2

population size = number in first sample x number in second sample divided by the number of marked in second sample

Question 3

name 2 assumptions made about capture, release, recapture

Answer 3

stable population
(birth rate = death rate)

no marks rubbed off

organism were marked in a way that didn’t increase predation

marking doesn’t harm individuals

no migration

enough time given to allow individuals to evenly redistribute amongst the population

proportion of marked to unmarked in second sample is the same as proportion of mark to unmarked in the population