Mark-Release-Recapture Method Concepts

This video tutorial by David from DBiology Classroom explains the Mark-Release-Recapture method, a technique used to estimate the population size of mobile organisms. It covers the methodology, assumptions, and steps involved in the process, and demonstrates how to use the Peterson or Lincoln Index for population size calculation. The video emphasizes the importance of meeting certain assumptions for accuracy and provides a practical example with snails. It concludes with a call to action for viewers to engage with the content.

What is the primary purpose of the Mark-Release-Recapture method?

• To track migration patterns

• To estimate the size of a population

• To identify new species

• To study animal behavior

Which type of organisms is the Mark-Release-Recapture method NOT suitable for?

• Aquatic animals

• Nocturnal animals

• Mobile organisms like insects

• Highly territorial animals

Which assumption is NOT necessary for the Mark-Release-Recapture method?

• The population is closed during the study

• Marked individuals are more visible to predators

• Marking does not affect survival

• All members mix randomly after marking

Why is it important for the time gap between captures to be carefully considered?

• To track weather patterns

• To observe behavioral changes

• To allow for seasonal changes

• To ensure marked individuals mix with the population

What is the first step in the Mark-Release-Recapture method?

• Identifying a suitable capture method

• Releasing the organisms

• Marking the captured organisms

• Calculating the population size

Which marking method is suitable for birds?

• Tagging with metal clips

• Water-resistant paint

• Leg bending

• Tattooing

What is the purpose of using the Peterson or Lincoln Index?

• To study animal behavior

• To identify new species

• To calculate the population size

• To track individual animal movements

In the example provided, how many snails were initially captured and marked?

• 60

• 25

• 30

• 72

What is the estimated total population size in the example given?

• 100

• 90

• 72

• 60

What assumption is made about the ratio of marked individuals in the recapture cohort?

• It is the same as the initial capture

• It is lower than the initial capture

• It is higher than the initial capture

• It is irrelevant to the calculation