Isle Royale Moose and Wolves

Isle Royale

Graph on the back On the back of this sheet of paper, graph the following data of the wolf and moose populations on Isle Royale. Your x-axis is time, starting with 1955 and ending with 2010, should have increments of 5-years labeled. Since moose numbers are so much greater than wolf numbers, use dual y-axis to graph the two populations. The left y-axis should be the wolves and labeled in increments of 10, from 0 to 50. The right y-axis should be in increments of 500, from zero to 2500, for the moose. *Different colors for each graph? Lines?

1. When the moose (prey) population increases, what happens to the wolf (predator) population? Why?

Wolf population increases (usually) due to the increase food source. 1. When the moose (prey) population increases, what happens to the wolf (predator) population? Why? Wolf population increases (usually) due to the increase food source.

2. What other factors may influence population numbers?

2. What other factors may influence population numbers? Other predators, Competition, Disease [Wolves 1980s], Natural Disasters…