Aquaculture
Fish and shellfish farming in controlled environments, providing 50% of global aquatic food production but with significant environmental impacts.
Formula
Feed Conversion Ratio (FCR) = Feed Input (kg) / Weight Gained (kg)
Real World
Norwegian salmon farming produces over 1.5 million tonnes annually, but each kilogram of farmed salmon requires ~1.2 kg of wild-caught fish for feed, raising net sustainability concerns.
Exam Focus
Balance advantages against disadvantages in 'evaluate' questions — credit is lost if you only discuss pollution without acknowledging reduced wild-stock pressure.
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