Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
Which of the following is NOT an assumption of the mark-release-recapture technique?
the marked individuals distribute evenly among the rest of the population
the marks are toxic and increase predation rates
the population has a definite boundary
the population remains constant with no significant immigration, emigration, births, or deaths
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Which of the following is true about random sampling?
it helps avoid bias in sampling
it is used to count all individuals across entire habitats
it is not practical for studying whole populations
fewer samples should be taken to improve accuracy
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What is a point quadrat?
a method of estimating the number of individuals in a frame quadrat
a frame with a horizontal bar and pins pushed through at set intervals
a square frame divided into a grid
a straight line made across an ecological area of study
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What is the main difference between continuous and interrupted belt transects?
continuous belt transects are used for non-motile organisms, while interrupted belt transects are used for motile species
continuous belt transects provide more precise data on population changes, while interrupted belt transects are faster
only continuous belt transects are used to study transitions and patterns in species distribution
continuous belt transects have quadrats placed at regular intervals, while interrupted belt transects have quadrats placed continuously
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Which of the following is an example of an abiotic factor that can influence species distribution?
predation
competition
pH
symbiosis
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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 marks are non-toxic and don't change behaviour
the marked individuals behave differently from unmarked individuals
the marks are permanent and cannot be lost
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What is percentage cover in a frame quadrat?
an estimate of the area within a quadrat that a species covers
the frequency of a species in a quadrat
the number of times a species is found in a quadrat
the number of total squares in a quadrat
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What is the purpose of allowing time for marked individuals to mix evenly throughout the population in the mark-release-recapture technique?
to increase predation rates
to ensure the sample is representative of the entire population
to ensure the population remains constant
to prevent immigration and emigration
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Which of the following is NOT true about random sampling?
it is used to count all individuals across entire habitats
more samples should be taken to improve accuracy
it helps avoid bias in sampling
it provides insight into whole populations
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What is the main limitation of the mark-release-recapture technique?
it can only be used for non-motile organisms
it requires a large number of samples
it assumes the population remains constant with no significant changes
it is time-consuming and labour-intensive
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Describe the steps involved in using the mark-release-recapture technique to estimate population size.
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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?
75
50
100
125
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