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An ecologist can determine the size of a population without counting every organism by either sampling, mark-and-recapture studies, or indirect or direct observation.

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Ecologists can estimate population size through methods such as mark-recapture, distance sampling, and census surveys. Mark-recapture involves capturing and marking individuals, releasing them, and then recapturing a sample to estimate total population size. Distance sampling involves estimating population size by observing and recording the distances to individuals from a specific vantage point. Census surveys involve conducting a thorough count of all individuals in a specific area.

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11mo ago
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Q: How can an ecologist ecologist measure population size?
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