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Researchers want to estimate the size of one population of Singing vole versus o

ID: 166820 • Letter: R

Question

Researchers want to estimate the size of one population of Singing vole versus one population of Tundra vole to determine if their population sizes will be differentially affected by climate change. They do this by making two trips to each of their favored habitats.   

   On the first trip to the Tundra vole habitat, 50 voles are captured and marked, and on the second trip, 55 voles are captured, of which 15 are marked.

On the first trip to the Singing vole habitat, 47 voles are captured and marked, and on the second trip, 42 are captured, of which 17 are marked. Estimate the population sizes of each of the two vole species. Round to the nearest whole number

Explanation / Answer

On the first trip to the Tundra vole habitat, 50 voles are captured and marked, and on the second trip, 55 voles are captured, of which 15 are marked.

On the first trip to the Singing vole habitat, 47 voles are captured and marked, and on the second trip, 42 are captured, of which 17 are marked. therefore the population sizes of each of the two vole species are 129   

first species total count is 65 and second species total count is 64 there fore population size will be 129

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