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?

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?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter52: Population Ecology

Section: Chapter Questions

Problem 7TYK

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9. Which of the following increases the population of certain species? * immigration emigration water availability predation 10. In a population of 1145 rabbits, how many years would it take to double their size given that their growth rate is 13.8% annually? * 158 years 50 years 5 years O half year 11. Which of the following is TRUE about the growth rate of a population? * Growth rate is negative if natality exceeds mortality. Growth rate is positive if mortality exceeds natality. There is an increase in the growth rate if emigration occurs. O The higher the female population, the higher the growth rate.
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?
3. A population of 1,492 Baltimore Orioles is introduced to an area of Nerstrand woods. Over the next year, the Orioles show a death rate of 0.395 while the population drops to 1,134. What's the birth rate for this population? Is this proving to be a suitable habitat? 4.780 turkeys live in Merriam township, which is 92 acres in size. The birth rate is 0.472 turkeys/ year. The death rate is 0.331 turkeys/ year. What is the population density? а. b. What is dN/dt? с. Predict N after one year, assuming dN/dt stays constant. One dandelion plant can produce many seeds, leading to a high growth rate for dandelion populations. If a population of dandelions is currently 40 individuals, and rma= 80 dandelions/month, predict dN/dt if these dandelions would grow exponentially. 5. Imagine the dandelions mentioned in #5 cannot grow exponentially, due to lack of space. The carrying capacity for their patch of lawn is 70 dandelions. What is their dN/dt in this logistic growth situation? 6.
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.
Suppose 200 fish are marked and released in a pond. The following week, 200 fish are caught and 100 of them have marks. There are about ______ fish in this pond. a. 200 b. 300 c. 400 d. 2,000
Which of the following methods will tell an ecologist about both the size and density of a population? mark and recapture mark and release quadrat life table
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?
1. Base on the graph below, why might the sex ratio of bird species in the figure change from as they grow from juveniles to adults? 0.5 0.5 40 50 30 40 30 20 20 10 10 0.30 0.36 0.42 0.48 0.54 0.60 Sex ratio 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Sex ratio (b) A) Nesting females are vulnerable to predatory attack. B) Males that are unable to mate die quickly. C) Females are less able to feed effectively as juveniles. D) More females are required to sustain the population. Frequency (a) Frequency I
7. 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.
1. The best example of a population in the list below is the a tiger salamander tadpoles in 2006. b nvertebrates in Elk Island National Park in June 2005. c Canadian darner dragonflies in Kerry Wood Nature Reserve on June 21, 2005.
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 males
3. A 1998 study of grizzly bears in the Kananaskis area estimated the population size at 48 to 56 individuals. The study area encompassed 4000 hectares. a) Use the values to determine maximum and minimum density estimates for the population.