1. Trout in the Classroom

2. We will: raise trout from eggs to fry monitor tank water quality
Study trout stream habitat
learn about water resources and conservation

3. Brook Trout Only native trout to PA
They need low temperature, a lot of oxygen, and excellent water quality

4. Indicator Species
An organism whose presence reflects the environmental conditions
They are sensitive to changes in their ecosystem
May get sick, die or leave the area

5. Timeline
Egg collection
Eggs shipped or delivered to schools

6. Timeline We get approximately 300 eggs
They will hatch in 2-3 weeks (called alevin or sac-fry)

7. Timeline
The fish will begin to swim up and look for food after approx. 1 week (Fry)
When they are 1-3 inches they will be called fingerlings

8. Adult Brook Trout Color and Markings
Reddish orange on belly and under fins
Yellow spots on sides
Yellow-brown worm-like markings on it’s back
Red spots with blue haloes across each side

9. Nitrogen Cycle Feed the fish
Extra food and fish waste turn to ammonia (NH4)
The ammonia changes into nitrites (NO2)
The nitrites change into nitrates (NO3)
Nitrates can poison the fish so you must clean the tank and change the water

10. Aquarium Jobs Check and record temperature
Remove dead eggs (later, fish), record numbers
Make water exchanges
Water quality tests, record results
Dust and clean equipment
Clean filter parts
Later, Siphon tank

11. Nitrogen Cycle