If models that display population growth ignored age structure how would this limit their value for predicting furture population size? Reference to either lx or mx.
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If models that display population growth ignored age structure how would this limit their value for predicting furture
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- Plot by hand the survivorship data for the Gray Squirrel life table. A survivorship curve has age or age class (x) on the x-axis and lx on the y-axis.The graph below depics elephant populations from 1900 to 1970. The growth can be described as __________. Logistic Logarithmic Exponential TrigonomoncA.) What influence did human density (Panel A), crow density (B), and avian species diversity (D) have on the probability of crow decline in aregion? B.) From a co-evolutionary perspective, why did the likelihood of crow population declines decrease as WNV spread westward after its introduction in 1999 (see Panel C above)?
- 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.If each adult female powerful owl produces 1 female juvenile (F) each year, the adult survival rate (Sa) is 0.8, the juvenile survival rate (Sj) is 0.4, and the population is N2022=1400 adult females and 1400 juvenile females in 2022, what will be the female population size in 2027 (N2027)? Show your calculations. (hint: use excel to set up a model and check your work)Based on the graph, did the zebra population growth rate (dN/dt) differ in the years 1985 and 2003? Why or why not? (Hint: dN/dt is equal to the slope of the curve showing population size, N, over time, t.)
- Construct an example of a phenotype distributioncurve for a population under directional selection that isincreasing in body size.Is the wolf population controlled by density or density-independent factors? Explain using one piece of information from the reading to support your choice. You should use those supports to back up your choice, that is, how did this piece of support lead you to your answer.In what ways would you expect forced migration to have an impact on the phenotypes of animal populations over the next 100 years?
- A study determined that a population of elephants had a density of 0.11 elephants/km 2. If this population roamed over an area of 230 km squared , then the estimated size of the population would be?A continuously growing population of alligators has a population size of 1,000 and an intrinsic rate of increase of r= 0.05 per year. Assuming that this rate of increase remains the same, about how long should it take for the population to reach 4000?You and your team continue to study the population of long-tongued pucas. You counted 1,000 individuals in this population at the start of the year. Over the course of a year, 150 pucas were born and 75 died. What is the per capita rate of increase (r) for this population?
