For many years, members of the Ojibwe [o-JIB-way] tribe in Minnesota have been catching a fish they like to eat called walleye. Today they are using mathematics and science to measure the changing population of walleye in their lakes. Will they be able to continue fishing for walleye, or will changes in the environment make their tradition no longer possible?

In this lesson, you will learn how the Ojibwe use population  sampling to measure the abundance, or number, of different fish in their lakes. You will also learn how to interpret, or make sense of, the data that they find and make predictions based on those numbers.