What is the status of the population? Select one a. Declining b. Growing c. Stable If x is in years, what is the generation time of this population? (answer as a whole number) Answer How many vultures are predicted to be in this population in twenty years if there are 100 now? Note: For simplicity, use two decimals for Ro and no decimals for T (round the number). Hint: Remember that your equation is in generations, not years. Answer At what age(s) do females make their greatest contribution to the net reproductive rate? a. Age class 0 b. Age class 4 c. Age class 2 d. Age class 1 e. Age class 3
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Questions 8-13 There are two populations as follows: Population 1: Age (yr) Population Death 0-4 165 10 5-14 75 10 15-19 60 10 Total 300 30 Population 2: Age (yr) Population Death 0-4 100 5 5-14 90 10 15-19 110 15 Total 300 30 8. What is the crude mortality rate in Population 1? (Please show all steps in your calculations) 9. What is the crude mortality rate in Population 2? (Please show all steps in your calculations) 10. Are the crude mortality rates in Population 1 and 2 the same? Is the risk of dying the same in the two populations? 11. Calculate age-specific mortality rate for each age group in Population 1 and 2. ((Please show all steps in your calculations) 12. Are age-specific mortality rates in Population 1 the same as those in Population 2? 13. How would you explain what you found in question 10 and 12?
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1. Describe the main factors that led to a boom in the human population size in the last 300 years. 2. Population A contains 450,000 people and has a 3.3 percent annual growth rate. Population B has 900,000 people and a 1.8 percent annual growth rate. Which population would increase by more people in one year? Explain 3. Describe the relationship between population density and population distribution. 4. As people become more concentrated in cities, some pressure on ecosystems in areas that are not less populated eases. Why do you think this is the case?
Problems 1-3. The number of a certain species of fish is modeled by the function n(t) = 12e^0.012t where t is measured in years and n(t) is measured in millions. 1. What is the relative rate of growth of the fish population? Express your answer as a per cent. 2. Determine the size of the fish population after 5 years? Round to the nearest 10th of a unit. 3. After how many years will the number of fish reach 30 million? Round to the nearest 10th of a unit.
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