Oceans Student Lab

Imagine you are a marine biologist studying the cod population in the future. Look at the data table below. Follow the pattern of each column: see how the ending population from one year becomes the beginning population of the following year.

In Year 5, the fishing quota was still zero, and the cod population increased by 15 (million).
Fill in the Year 5 column with the correct numbers in each row.

After five years of population testing, the government informs you that they wish to reopen the area for limited cod fishing. They ask you to set a quota, or a limit, on the number of fish that can be caught each year.
Looking at your population graph, what quota would you advise?

Draw a Cod Card for each year to find out what will happen. In real life, marine biologists do not know all the conditions that might affect fish from year to year.

Now fill in the starting and ending population for each year.

Here is a graph of the ending populations for each year.

Here is the data for each year.

* in millions Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 Starting population: 250 280 270 290 Fishing Quota: 0 0 0 0 Cod Population Increase: +30 -10 +20 +50 Ending Population for this year: 280 270 290 340
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