1. Keeping Your Fish Populations Healthy

5. Healthy Fish Populations

6. Big Fish
Eat lots of high energy food and spend little energy getting it.

7. Many Fish
Eggs survive
Young find food and shelter
Don’t get eaten

8. Four Factors Affecting Fish Populations
Habitat
Introduced Species
Pollution
Harvest
Talk will give a broad plain language overview of the four things that affect the health of fish populations (habitat, introduced species, harvest, pollution) how these things are interlinked through the food chain and how each affects a fish population plus some take home messages about each.  Does that sound okay?

9. Hunt, Hide, Rest, and Reproduce
Habitat
Hunt, Hide, Rest, and Reproduce
Food Source

10. Habitat

11. Hunt, Hide, Rest, and Reproduce
Habitat
Hunt, Hide, Rest, and Reproduce
Food Source

12. Change habitat Kill fish Reduce food Poor food
Introduced Species
Change habitat Kill fish Reduce food Poor food

13. Change habitat Kill fish Reduce food Poor food
Introduced Species
Change habitat Kill fish Reduce food Poor food

14. Pollution
Render Fish Unsafe to eat Change Available Food Change the Habitat Kill fish

15. Harvest
Loss of large fish Remove more than can reproduce Remove enough to change the food web

16. QUESTIONS?