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Measuring Populations

Measuring Populations . By Austin, Alfonso and Anthony. Direct Observation. Counting all the members of an area one by one is called direct observation. We went to the beach and counted all the turtles one by one.That is a direct observation. Indirect Observation.

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Measuring Populations

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  1. Measuring Populations By Austin, Alfonso and Anthony

  2. Direct Observation Counting all the members of an area one by one is called direct observation. We went to the beach and counted all the turtles one by one.That is a direct observation.

  3. Indirect Observation • Counting the things around a species environment is indirect observation. • We counted bee hives and multiplied by the amount of bee’s in each hive to show how many bee’s were in the area.

  4. Sampling • You count the number of members in a small area then multiply the number to get a larger area estimate. • We counted the number of people in one block then multiplied it by the number of blocks in the city to show the number of people in the city.

  5. Mark and Recapture Mark and Recapture is when people capture a group of animals and tag them then release them and then later they recapture them and count how many have tags on them. We captured a bunch of fish and then marked them and then recaptured them later and then we did a mathematical formula to find how many fish were in the river.

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