- All players must stay within the designated area.
- The eels (or other predators) try to tag the prey. When tagged the prey go to the timeout area and count to 20 before rejoining the game.
- Prey cannot be tagged while they are in a hoop. Only two prey at a time can be in a hoop and they can only stay there for five seconds.
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Scenario 1
Normal healthy stream
5 eels
rest of class – prey
5 hoops
Questions
What do you notice? Was there enough food for the eels? Was there enough food and shelter for the prey? |
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Scenario 2
The cows have been crossing the stream to get to the milking shed, and have destroyed all the safe places and food sources for the prey.
5 eels
rest of class – prey
1 hoop
Questions
What do you notice about the population of the prey? Are they able to maintain their numbers? What effect will this eventually have on the eels? |
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Scenario 3
The local children have been on an eel-catching expedition. Only 1 eel is left.
1 eel
rest of class – prey
5 hoops
Questions
What do you notice about the population of prey? What problems might this cause them? What do you think might be the impact to the stream community? |
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Scenario 4
Some new eels have arrived to live in the stream
10 eels
rest of class – prey
5 hoops
Questions
What do you notice about the population of prey? What problem will this cause the eels? |
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Scenario 5
A disease has wiped out all the water snails
4 young eels [predator A]
1 old eel [predator B]
rest of class – koura
5 hoops
Questions
What do you notice about the population of eels? What problems will this cause for the eels in the future? |
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Scenario 6
The stream has had its banks bricked and tidied. There is nowhere for the eels to hide.
4 young eels [predator A]
5 kingfishers [predator B]
rest of class – mayfly larvae
0 hoops
Questions
What do you notice about the population of eels? What effect might this have on the kingfishers? What effect might there be on the mayflies? |