3.3 Lesson Name: Status Quo Catch Analysis

The default long-term management strategy is to make some catch reductions during 1995-1997 and then beyond 1998 keep catches and harvest rates at about the average 1991-1994 level. How will this strategy impact fishery catches?

Analysis Approach:

Run the model under the default long-term management strategy and record the catch trends for each fishery.

How To Do It:

1. Create a table with three columns for recording the data. Column one is for the fishery name, column two is for the trend (increasing, decreasing, stable), and column three is for the approximate value in year 2017.
2. Launch and run the model.
3. Click the Fishery Menu.
4. Click Fishery Graphs.
5. Click Catches.
6. Click Total.
7. Resize the resulting Total Catch Graph so it fits in the upper right portion of the screen and lets you see the map icons.
8. Click the "wand" button at the top of the graph.
9. Move the mouse pointer over a fishery icon (boat icon) to show the catch trend for that fishery (the fishery name will be at the top of the graph window).
10. Record the trend of the catch during the simulation period.
11. Move the mouse pointer onto the graph window (be careful not to move the pointer over another fishery icon or it will change the graph) and determine the approximate catch in year 2017. Record the catch in the table.
12. Repeat steps 9-11 until data for all fisheries has been recorded.

1. How many fisheries have increasing, decreasing, or stable catch trends?
2. Is there any correlation between catch trends and fishery type (troll, net, sport)?
3. Why do some catch ceiling fisheries have perfectly stable catches while other ceiling fisheries have increasing or decreasing catches?