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- 6. Draw a simple graph that illustrates the general relationship between organism size and population density. Place body size on the x-axis and population density on the y-axis.1. Hunting is one way of reducing population size. Wildlife managers closely watch changes in population numbers of all wildlife species in order to determine legal hunting ‘bag limits’ for each hunter. Depending on changes in population size, hunting bag limits are changed from year to year. In each of the following scenarios, suggest what changes might have occurred in the population in the previous year to warrant these changes in bag limits. (Address all four factors that affect population size.) a.) The mallard duck bag limit has increased from four ducks/day to eight ducks/day. b.) The previous year 1 female black bear could be taken, and up to 3 males could be taken. This year no females can be taken.2. What is the generation time, net reproductive rate, and intrinsic rate of increase? 3. Plot the change in population size over time (for 10 years) starting with 10 individuals. 4. What would the female population size be in 25 years? 5. If hares were an endangered species, what other kinds of information would you need to gather to support your predictions made in 3 and 4?
- 11. To measure the population of monarch butterflies occupying a particular park, 10 butterflies were captured, marked with a small dot on a wing, and then released. The next day, another 50 butterflies are captured, including the recapture of 5 marked butterflies. What will be the estimated population size?10. Effective population size refers to the number of individuals which can participate in the reproduction process. Which of the following proportions of individuals would bring about the highest effective population size? 20 females and 80 males 70 females and 30 males 45 females and 55 males 35 females and 65 males7. An 'overshoot' in a population occurs when * the mortality of the population exceeds the natality. O the replenished resources in an ecosystem equals the natality. the natality of the population does not decrease with respect to the replenished resources. O the ecosystem is damaged or destroyed. 8. Which of the following is most likely to occur if there is an 'overshoot' in a population? * O Rate of immigration of individuals increases. O Competition occurs and there is a rapid decrease in the population. The ecosystem will collapse because of the limited resources. The species will be endangered.
- 4. Can you explain why the predator and prey populations do not rise and fall together? What is the reason for the "off-set" nature of the pattern? In general, what population must remain higher for this relationship to be sustainable? Predator or prey?? (A) population size predator prey time (t)1. How do demographic factors affect population size? 2. Are the effects of these factors mutually exclusive?6. What is the difference between exponential growth in a population (1-shaped curve) and logistic growth (S-shaped curve)?
- 1. Do the carrying capacity has a big role in limiting the population size of milkfish given the fact that it is an r-strategists? If yes, why? If no, why not? Discuss it.5. Describe a density-independent factor and explain why its effect on population growth is independent of population density 6. How do density-dependent factors limit population growth?2. If the food source is affecting the buffalo population, what do you predict the graph of the food source would look like? Either draw a graph or write a prediction.