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Population Growth
R and K Selection
R and K selection are concepts in ecology used to describe traits in the fluctuation of a population or population dynamics. For example, they describe the life-association traits between parent and offspring, such as quantity or number of young ones born at a time, quality of parental care, the age to maturity, and reproductive effort.
A population of rabbits contained 200 individuals in 2017 and 300 in 2018. What was its finite rate of increase, λ, over that one year?
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- Contrast exponential and logistic (= sigmoid) growth of a population. Under what conditions might you expect a population to exhibit ex-ponential growth? Why can exponential growth not be perpetuated indefinitely?Figure (c) shows a population increasing in size under the influence of the relationships in (a) and (b). What do each arrow represent?A particular specie of animal has a carrying capacity of K and a growth rate of r. From an initial population of N0, what will be its population after a very long time? Show your calculations.
- 24 rabbits were brought to Australia in 1859 and 6 years later there were 240,000. What is the intrinsic rate of increase?Explain what is happening to the population at points A, B, C, and Din the following diagram.In an Inuit population in Greenland it was found that among 200 people, 168 were MM, 30 were MN, and 2 were NN. Is this population in Hardy-Weinberg equilibrium?
- You are studying a density - dependent turtle population that has the following relationships for the birth rate b’ and the death rate d’ as a function of population size (N) : b’ = 0.10 + 0.03 N - 0.0005 N ^2 d’ = 0.20 + 0.01 N Plot these functions in the same graph and discuss the population dynamics of the turtle. How does this model differ from the simple logistic model with linear birth and death functions?A population of a city reproduces at a rate of 3% per year and has a death rate of 1% per year. Assuming an initial population of 100 and no immigration and migration, what would be the population in 100 years?The growth rate for a population of 90 field mice in six months was 429%. If the number of births was 342, the number of deaths was 43, and there was no emigration, calculate the number of mice that migrated into the field.
- Using a chi-square analysis attached below, determine whether the following population is under Hardy-Weinberg equilibriumIf a population is in Hardy-Weinberg equilibrium, we can conclude that the population is evolving. Group of answer choices True FalseIn a population of fish, gold scales are dominant to black scales. A fish population of 100 total have 65 fish that have gold scales. Based on this information, what is the p value? Please report your answer as a decimal rounded to the hundredths.