Question

Questions 1-6 are based on the following calculation of population trajectory. Managers are producing another new breeding colony of snuffles with the following age-specific survival rates (sx) and reproduction rates (mx). Calculate the population trajectory and the age distribution of this population for twelve years using the table below. mx SX mx age age specific fecundity age specific survivorship SX 1-2 10.5 3-4 20.5 5-6 30.5 7-8 2 0.5 9- 100 0 9 10 11 12 3-4 Population trajectory 0 1 0 20 1-2 100 5 5 5-6 0 2.5 0 0 9-10 0 0 15 27.5 Lambda 1.833333 1.136364 2 17.5 10 0 2.5 1.25 0 31.25 7-8 1-2 Age distribution trajectory (proportion of each age class from total for that year) 0 0.727273 0.56 0.666667 0 0.32 3-4 0.333333 0.181818 0 5-6 0 0.090909 0.08 7-8 0 0 0.04 9-10 0 0 0 Total population size (Nt) at t=12. equals

Question: What type of survivorship curve does it have?

Answer 1

b. Type 2 straight line curve- This population increases exponentially with time and are characterized by constant mortality or survivorship rate throughout their life expectancies. Individuals in the group whose chances of survival are independent of age. The graph shows a diagonal line going downward on the graph.