4.3 Aquatic food production systems Quiz
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5 questions, one answer each
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1. Which organisms provide the energy for marine food webs?
- A. Zooplankton
- B. Phytoplankton
- C. Sharks
- D. Bacteria in sediment
2. MSY is best described as:
- A. The total stock of fish
- B. The highest annual catch that can be sustained
- C. The cheapest catch for fishers
- D. The number of boats allowed
3. What is the main reason the Grand Banks cod collapsed?
- A. Ocean acidification only
- B. Overexploitation
- C. Too many marine protected areas
- D. Aquaculture escapes
4. Which is an environmental impact of fish farming?
- A. Increased wild fish stocks
- B. Spread of parasites to wild fish
- C. Reduced nutrient levels
- D. Increased oxygen on the seabed
5. How does an MPA help to maintain sustainable yields?
- A. By increasing quotas
- B. By protecting spawning grounds so fish spill over
- C. By stopping consumers eating fish
- D. By removing predators