pop ecology quiz - rate over these 44 years 7 When rats...

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BILD 3 Dr. Woodruff Winter 2010 Sample Population Ecology Problems 1. The intrinsic rate of increase of a certain population is 1.4% and its average annual death rate is 12 per 1000. Its average birth rate is therefore? 2. If a population increases by 10,000 individuals in one year and the original size of the population (N 0 ) was 200,000 individuals, what is its intrinsic rate of increase? 3. If a population of 2,000 fruit flies has an intrinsic rate of increase of 1.0%, how many individuals will it contain at the end of one year? 4. Between 1700 and 1800 AD the human population grew steadily on a species-wide scale. It increased from approximately 600 million to 900 million during that century. What was r ? 5. By 2003 the human population had reached 6.3 billion people. On a species-wide basis the birth rate was 21 per 1000 per year and the death rate was 19 per 1000 per year. By how many million people did the population increase in 2003? 6. The analogous numbers for 1959 were 2.9 billion, 36, and 19. What happened to the growth
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Unformatted text preview: rate over these 44 years? 7. When rats invade a new warehouse where living conditions are ideal, they multiple at a very rapid rate: = 0.0147/day. How many days are required for the population to double? 8. 2006 population data (UNFPA), (data rounded: millions or as per 1000 per yr.) 1990: N BR DR 2006: N BR DR Nigeria 86 46 16 127 39 14 China 1116 22 7 1313 15 7 Czech R. 10 13 13 10 9 11 Mexico 83 29 6 103 22 5 a. which country has the highest r in 2006? In 1990? b. how many years will it take the population of Nigeria to double? c. Which country is furthest along in the demographic transition? 9. Using the logistic growth equation calculate the instantaneous rate of increase of a population when a. = 0.01/yr and N = K/1000 b. = 0.01/yr and N = K/2 c. = 0.01/yr and N = K 10. Explain Volterra’s principle of pest resurgence using the Lotka-Volterra equations?...
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