1. AQUACULTURE: The Blue Revolution?

2. Aquaculture
Status: fastest growing food production industry in the world (1/3 of all fishery landings)

3. Aquaculture: Fish Farms
Energy flow perspective
Terrestrial herbivore (cow) vs. aquatic herbivore (carp)
Salmon vs. carp vs. filter feeders
Farmed salmon vs. wild salmon
Table 2. By Naylor, “Effect of Aquaculture on World Fish Supplies” (review article)

4. Sustainable Aquaculture?
2005: American Association for the Advancement of Science Annual Meeting, WashingtonD.C.

5. Sustainable Aquaculture?

8. A Closer Look at Farmed Atlantic Salmon
95% of Atlantic Salmon population is in Aquaculture!
Health Concerns
Disease, antibiotics, nutrient loading
Human health: cancer
Effect on Wild Salmon
genetic adaptability
Inbreeding
Competition
New selective pressures
Food web effects

9. Invasive Species Glossary
native: an organism that is living in its home environment
exotic
non-native originally from a different location
foreign/alien
naturalized: a non-native that has become a part of its new environment
invasive: a non-native that has spread to become a dominant member of its new environment
weed: an invasive species of plant that causes
environmental or economic problems
- Noxious weed: legally designated as a pest

10. Shrimp Farming Mangrove destruction Where does ‘stock’ come from?
Change of ecosystem structure
Social inequalities
Where does ‘stock’ come from?
Salinization
Land conversion
Shrimp Farm in Mexico:

11. Aquaculture: Risks Impact on wild fish populations Algal blooms
Feed for farmed fish
‘Seed’ for farmed fish
Fish escapes- invasive species
Algal blooms
Oxygen depletion
Downstream impacts
Disease
(Wet)land conversion

12. Aquaculture: Integrated Systems Approach+

13. Aquaculture: Integrated Systems Approach
BENEFITS: COSTS/RISKS:
Waste = food Pesticide use
Whole is greater than Labor intensive
sum of parts Limit to fish density

14. What Can You Do?
Vote with your dollars!
Get involved!
Educate others!