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This quiz contains 11 questions from a mix of 1 subtopics.
Why are quadrats not typically used to measure animal abundance?
animals are mobile and do not remain in a fixed area
quadrats are only suitable for measuring plant abundance
animals are too difficult to identify
animals are too small to be counted accurately
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What is the first step in the mark-release-recapture technique?
use a mathematical formula to estimate the total population size
capture a sample of individuals from the target population
allow time for marked individuals to mix evenly throughout the population
release marked individuals back into the original habitat
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How are captured individuals marked in the mark-release-recapture technique?
by recording their weight and size
by attaching a GPS tracker
by tagging or painting them
by taking a DNA sample
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What is recorded during the recapture phase of the mark-release-recapture technique?
the size and weight of each individual
the total number of individuals captured
the age and sex of each individual
the number of marked and unmarked individuals
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If 20 squirrels were originally captured, marked, and released, and later 15 squirrels were captured including 3 marked ones, what is the estimated population size using the Lincoln index?
50
125
100
75
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Which of the following is an assumption of the mark-release-recapture technique?
the population changes significantly between sampling periods
the marks increase predation rates and change behaviour
the marks are permanent and cannot be lost
marked individuals do not distribute evenly among the population
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What can cause inaccurate population estimates when using the mark-release-recapture technique?
using non-toxic marks that don't change behaviour
allowing sufficient time for marked individuals to mix evenly
the population having a definite boundary
significant immigration or emigration between sampling periods
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Which of the following is NOT an assumption of the mark-release-recapture technique?
the population has a definite boundary
the marked individuals distribute evenly among the rest of the population
the population remains constant with no significant immigration, emigration, births, or deaths
the marks are toxic and increase predation rates
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What is the purpose of allowing time between the release and recapture phases in the mark-release-recapture technique?
to allow the population size to increase
to allow the marks to become permanent
to allow marked individuals to mix evenly throughout the population
to allow the population to migrate to a new area
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Which of the following could lead to an overestimation of population size when using the mark-release-recapture technique?
marked individuals being more likely to be recaptured than unmarked individuals
marked individuals distributing evenly among the population
the population remaining constant between sampling periods
marked individuals being less likely to be recaptured than unmarked individuals
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What is the main purpose of using the mark-release-recapture technique?
to assess the health of individual animals
to estimate the total population size
to determine the age structure of the population
to track the movement of individual animals
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