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Measuring Populations

Measuring Populations. olsd,pous,brit. Direct Observations. Counting things one by one. Example: We counted all the fish in my fish tank one by one. Indirect Observation. Observing the signs of an organism to find its population in an area

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Measuring Populations

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  1. Measuring Populations olsd,pous,brit

  2. Direct Observations • Counting things one by one. • Example: We counted all the fish in my fish tank one by one.

  3. Indirect Observation • Observing the signs of an organism to find its population in an area • We counted all the hatched duck eggs to determine how many ducks were in the area

  4. Sampling • You count how many there are in a certain area and multiply the number depending on how big the area is around the objects you counted. • I counted all the trees that are in one acrein the rain forest and multiplied it by how many acres were in the rain forest

  5. Mark and Recapture • Capture an organism and mark it so you can trace its activity. • We captured a platypus when it was young and we tracked its activity while growing up.

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