Sustainable aquatic food production
Big idea: Sustainable fishing means harvesting at or below maximum sustainable yield (MSY) — taking only what can regenerate. This requires science-based quotas, protected areas, and responsible practices.
Management strategies for capture fisheries
- Fishing quotas — limits on how much can be caught
- Marine Protected Areas (MPAs) — no-take zones allow stocks to recover
- Closed seasons — no fishing during breeding periods
- Gear restrictions — mesh size limits, bans on destructive methods
- Catch certification — traceability to prevent IUU fish entering markets
- Consumer labels — MSC certification guides sustainable choices
Sustainable aquaculture practices
- Farming herbivorous/omnivorous species (lower on food chain)
- Integrated multi-trophic aquaculture (IMTA) — waste from one species feeds another
- Recirculating systems — filters and reuses water
- Reducing antibiotic use through better husbandry
- Locating farms to minimize wild population interaction
Sustainable management means use is less than or equal to regeneration rate. Link harvest to MSY, then give several specific strategies for fisheries and aquaculture with brief explanations (one clear point per strategy).
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IB-style question — can aquatic food production be sustainable? [9]
Even when fishing is capped at the sustainable yield, other parts of an aquatic food system can still cause harm.
To what extent can aquatic food production systems truly be considered sustainable? [9]
How to answer it, step by step
- Argue both sides with examples
• FOR: quotas at the maximum sustainable yield, marine protected areas, minimum mesh sizes and closed-system aquaculture all reduce impact
• AGAINST: bycatch, trawling damage, fuel use, escapee fish diluting wild genes and feed waste causing eutrophication remain even at safe catch limits - Reach a clear, supported conclusion
• Weigh the two sides — don't just describe them
• e.g. 'Legislation can fix much, but some impacts (bycatch, fuel use) are unavoidable, so full sustainability is rarely reached.'
Final answer
For a [9] essay you must give a balanced FOR-and-AGAINST with named impacts AND finish with an explicit value-judgement conclusion — a one-sided answer caps low.