Mark-Recapture Method Concepts

The video tutorial discusses methods for estimating population size, focusing on the quadrant and mark-recapture methods. The quadrant method is suitable for immobile or slow-moving organisms, while the mark-recapture method is used for mobile organisms. The tutorial explains the mark-recapture formula and provides a sample problem involving birds to illustrate the calculation of population size.

Why is it often impractical to count every individual in a large population?

• It is unnecessary because populations are always stable.

• It is impossible to identify all species.

• It is too time-consuming and expensive.

• It is illegal to count all individuals.

Which method is best suited for estimating populations of immobile or slow-moving organisms?

• Genetic Sampling Method

• Aerial Survey Method

• Quadrant Method

• Mark-Recapture Method

What is the first step in the mark-recapture method?

• Calculating the total population size

• Marking a sample of organisms

• Counting all individuals in a quadrant

• Releasing marked individuals into a new environment

Which method is more suitable for mobile organisms?

• Aerial Survey Method

• Genetic Sampling Method

• Quadrant Method

• Mark-Recapture Method

What is the purpose of marking organisms in the mark-recapture method?

• To track their migration patterns

• To identify them for future recapture

• To prevent them from reproducing

• To make them easier to spot in the wild

In the mark-recapture method, what does the ratio of marked to unmarked individuals help estimate?

• The migration patterns of the species

• The average lifespan of the species

• The total population size

• The growth rate of the population

What is the formula used in the mark-recapture method to estimate population size?

• Total population size = Total marked individuals + Second sample size

• Total population size = Recaptured marked individuals * Second sample size

• Total marked individuals = Total population size / Second sample size

• Total marked individuals / Total population size = Recaptured marked individuals / Second sample size

In the sample problem, how many birds were initially marked?

• 20

• 15

• 10

• 25

How many birds were recaptured in the second sample in the example problem?

• 10

• 7

• 5

• 3

What is the estimated population size of the birds in the sample problem?

• 90

• 80

• 70

• 60