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- 1. The northern hairy-nosed wombat has experienced historical population declines, though population have stabilized recently due to conservation efforts. While studying them researchers noticed the following fluctuations in (effective) population size: Year 1: 100 individuals Year 2: 90 individuals Year 3: 50 individuals Year 4: 75 individuals Year 5: 90 individuals Year 6: 95 individuals A. Given this information what is the long-term effective population size of this particular population over the six years?9) If the population of hawks in this area increases, their prey populations might decrease. Later, with fewer prey, the hawk population might decrease. The prey populations might then increase. This is an example of1. 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.
- 1. What happens to the prey species when the predator species population increases? Why? Please answer.29. The competitive exclusion principle states that species that compete for the same resource in the same way: will end up with one eating the other to extinction. will have population numbers that cycle in response to one another. cannot coexist and one will outcompete the other. usually find a way to coexist.1. Based on the graph, determine the population of carabao in:i. 4 years: _______ii. 5 years: _______iii. 6 years: _______2. What is the maximum carrying capacity of carabao in the given ecosystem?3. How many years did it take for the carabao to reach its carrying capacity? Explain your answer.
- Figure 45.10b If the major food source of the seals declines due to pollution or overfishing, which of the following would likely occur? The carrying capacity of seals would decrease, as would the seal population. The carrying capacity of seals would decrease, but the seal population would remain the same. The number of seal deaths would increase but the number of births would also increase, so the population size would remain the same. The carrying capacity of seals would remain the same, but the population of seals would decrease.Figure 19.6 If the major food source of seals declines due to pollution or overfishing, which of the following would likely occur? a. The carrying capacity of seals would decrease, as would the seal population. b. The carrying capacity of seals would decrease, but the seal population would remain the same. c. The number of seal deaths would increase, but the number of births would also increase, so the population size would remain the same. d. The carrying capacity of seals would remain the same, but the population of seals would decrease.One reason why human populations have been able to sidestep the factors that usually control population growth is that: a. the carrying capacity for humans has remained constant sincehumans first evolved. b. agriculture and industrialization have increased the carryingcapacity for our species. c. the population growth rate (r) for the human population hasalways been small. d. the age structure of human populations has no impact on itspopulation growth. e. plagues have killed off large numbers of humans at certaintimes in the past.
- How is a clumped population distribution beneficial for prey animals? Being a member of a larger group provides protection for each individual from predators Prey animals rely on each other to acquire food Prey animals live in small family groups to raise young Clumped population distributions ensure that at least one member of the population knows how to identify the seasonal migration route.1. From the animals in the figure, which species could have a positive indirect effect on the Possum? 2. If you suspect that competition between Wallabies and Bandicoots is leading to coexistence, describe an example of a piece of evidence that would support your idea. 3. If Tasmanian devils become extinct in the wild due to DFTD, name a species other than cats that you expect would change in abundance as a result. Explain how you think that species' abundance would change and why.9.Which of the following causes populations to shift most quickly from an exponential to a logistic population growth? a Favorable climatic conditions b Decreased death rate c Increased birth rate d Removal of predators e Competition for resources