WMAN 150 Homework #2

Homework #2 WMAN 150 Here are (hypothetical) data on survivorship and reproduction collected from a (hypothetical) population. Age l a m a l a m a 0 0.95 0 0 1 0.8 0 0 2 0.7 3 2.1 3 0.3 2 0.6 4 0.2 1 0.2 5 0.1 1 0.1 Calculate R 0 . Be sure to add numbers to the last column in the table above. (10 points) 3 Is the population increasing, stable, or decreasing? (5 points) The population is increasing Come up with a sustainable harvest plan (i.e., what proportion of the population can be harvested and what ages?). Specifically state what your plan is (proportion harvested and ages harvested). The table is repeated below so you can show your work demonstrating that your harvest plan is sustainable. To get full credit, you must show your work and show your new R 0 value after harvest. (15 points) Age l a New l a m a New l a m a 0 0.95 .95 0 0 1 0.8 .8 0 0 2 0.7 .7 3 2.1 3 0.3(1-0.5) .15 2 .3 4 0.2(1-0.5) 2 .05 1 .05 5 0.1(1-0.5) 3 .0125 1 .0125 Plan: harvest 50% of ages 3 and older. R 0 =2.4625