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Population Calculations

Population Calculations. Lecture 5.2 Chapter 6-day 2. Projecting Population Size. Where: N o = original population size N = new population size t = time in years r = growth rate as a decimal. Projecting Population Size.

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Population Calculations

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  1. Population Calculations Lecture 5.2 Chapter 6-day 2

  2. Projecting Population Size Where: No= original population size N= new population size t= time in years r= growth rate as a decimal

  3. Projecting Population Size • Example 1: An ant colony has a population of 175,000 ants. If it is growing at a rate of 2.2% every month, what will be the new population after one year? • TANGENT: Ant Colony: What is the Size of the Tunnels?

  4. Projecting Growth Rate • Example 2: The Verungas area in Africa is extremely mountainous, and it is shared between three countries: Rwanda, Uganda, and the Democratic Republic of Congo. In 2006 the mountain gorilla population was 302. In 2010, wildlife surveys determined the population to be 480. What was the growth rate of the mountain gorilla in Verungas area during this time period?

  5. Projecting Time • Example 3: As of 2011, it is estimated that there are six rats for every single person in New York City (population of 8.3 million). If rats reproduce at a rate of 4.2% annually, when will the population of rats reach 200 million?

  6. Why Care At All About Projecting Population, Size, Growth Rates, and Time? • See video: Mouse infestation is Australia

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