Before you begin playing, print this datasheet. As you move through the watershed from the spawning grounds to the ocean, you will encounter perils that will reduce the number of fish in your school. The perils are listed on this datasheet. You can read more about each peril by clicking your mouse on the name of the peril. After each of your turns, record the number and percent of remaining fish in your school. Also decide if the peril is natural or caused by humans, and whether it is unavoidable or preventable. You may need to refer to this information after you complete the game.
Cause Abbrev.
Natural N
Man Made M
Preventable p
Unavoidable U
Name:
# Spawning Ground Perils
 % of school destroyed # of remaining fish Cause
1. Storm      
2. Anitfreeze      
3. Acid Rain      
4. Soaring Temperatures      
5. Silt      
6. Salt      
7. Organisms      
8. Cattle      
9. Favorable      
10. Optimal      

# Stream Perils
 % of school destroyed # of remaining fish Cause
1. Lack of Food and Shelter      
2. Bridge Construction      
3. Pesticides      
4. Chlorinated Water      
5. Microbe Attack      
6. Low Dissolved Oxygen      
7. Fertilizers      
8. Birds      
9. Restoration      
10. Conservation Legislation      

# River Perils
 % of school destroyed # of remaining fish Cause
1. Power Plant      
2. Low Dissolved Oxygen      
3. Petroleum      
4. Bluefish      
5. Starvation      
6. Storm Surge      
7. Herring Gulls      
8. Leeches      
9. Restoration      
10. Optimal      

# Ocean Perils
 % of school destroyed # of remaining fish Cause
1. Purse Seines      
2. Starvation      
3. Haul Seines      
4. Gill Nets      
5. Fishing Trawlers      
6. Tuna Fish      
7. Bluefish and Striped Bass      
8. Gulls and Terns      
9. Escapes Predators      
10. Optimal      

# River Perils
 % of school destroyed # of remaining fish Cause
1. Pound Nets      
2. Gill Nets      
3. Wrong Fork      
4. Haul Seine      
5. Predator Fish      
6. Carried of Course      
7. Predator Attack      
8. Changing Conditions      
9. Traps or Predators      
10. Optimal      

# Stream Perils
 % of school destroyed # of remaining fish Cause
1. Stream Blockages      
2. Changes in Stream      
3. Stream Alterations      
4. Anglers      
5. Mud and Sediment      
6. Snags and Gang Hooks      
7. Chemical poisoning      
8. Predators      
9. High Citizen Awareness      
10. Optimal