Salmon Stream Design
In this activity, students create a model of a salmon stream habitat.
A good Pacific salmon rearing area should have:
- different types of habitat for cover for fish
- few floods and droughts
- moderate summer temperatures
- few predators
- lots of insects for food
In a good spawning area, adult salmon should be able to reach spawning gravel that has free-flowing water and is free of silt.
- Identify parts of a salmon stream.
- Describe conditions for a successful salmon spawn.
- Create a model.
- drawing or collage materials
What To Do:
- Hand out paper and pens.
- Have students draw (or otherwise represent) their ideal habitat for salmon egg/alevin/fry survival.
Drawings could include:
• trees/vegetation on the banks
• tree debris in the stream
• overhanging trees and brush
• rocks in the stream
• pools for shelter
• gravel bed free of silt/sediment/pollution
• water riffles indicating a fast flow (therefore good oxygen quality)
• good water level
• good temperature
• supply of insects, including larvae
• absence of predators (including "no fishing" signs)
• dogs on-leash
• litter bins to prevent trash in the stream
- What does an egg need to protect itself?
- What kind of habitat does an alevin need to hide from predators?
- What conditions does a fry need to survive?
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