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What is the difference between a stable and an unstable equilibrium for the population of a fishery?
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- Is the Milkfish Population r-strategist or K-strategist?Draw and label graphs (including zero-growth isoclines) showing the predicted behavior of the Lotka-Volterra predator/prey equations if we assume prey growth follows and exponential growth model. Show how the graphs would change of the prey follow a logistic growth model.To measure the population of lake trout in a 250-hectare lake, 100 individuals were netted and marked with a fin clip, and then returned to the lake. The next week, the lake is netted again, and out of the 300 lake trout that are caught, 15 have fin clips. Using the capture-recapture estimate, the lake trout population size could be closest to? Also, what formula do I use to solve this problem? Thank You!
- What contributions have laboratory and mathematical models made to our understanding of predator–prey population cycles? What are the shortcomings of these modeling approaches? What are their advantages?Assume that for a given population of moose, the per-capita birth rate remains constant with population size. However, as the moose population size increases there is a linear increase in the probability of starvation and subsequent mortality due to intraspecific competition. a) On a single graph, draw the relationship between moose density and the per capita birth and death rates for this population. b) Assume that the population does not experience competition from other species, nor predation. Write out the equation that would best be used to describe the change in population growth from one time interval to another.You want to estimate the population size of pink salmon in the upper pitt river and use a mark-recapture technique to do so. You mark 1313 individuals as they pass under the port mann bridge. two weeks later you recapture 2245 individuals in pitt lake of which 204 have marks on them. What is your estimate of the population size?
- What is a benefit of uniform dispersion? decreased competition increased resources easier reproduction increased competitionAt what general size does a fish population have the greatest potential for growth and reproduction?Calculate the rate of population change for a hypothetical population of wildebeest using the logistics equation and carrying capacity equation. How can you explain these results? N = 500, r = 0.1, K = 1000, calculate dN/dt.
- What are the various categories and subcategories of fish migration? Give a brief description of eachDraw on one graph, with N2 on the y-axis and N1 on the x-axis, the isoclines for the twocompetitors with the carrying capacities and competition coefficients listed below. Will thesespecies coexist? If not, which species will win? Competitor 1 Competitor 2 K1 = 200, α12 = 0.4 K2 = 400, α21 =1A large lake contains an abundance of rainbow trout. You capture 75 trout, tag and then release them. You then capture another sample of 200 trout. Of the 200 trout in this second sample, 15 have tags. a) Estimate the number of trout in the lake using the mark-recapture technique. b) What assumptions do you make when using the mark-recapture technique? state 2 assumptions and explain why they are important.