Edexcel IGCSE Biology 5.9B fish farming
Practise fish farming by calculating feed efficiency, explaining water-quality problems and evaluating site or diet choices from evidence.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
Exam points
- Calculate feed conversion index or pellet mass from tilapia growth data in tables.
- Explain how waste and uneaten food raise nitrates, causing algal growth and oxygen loss.
- Evaluate farming choices such as herbivore species, offshore sites or monitoring difficulty.
5.9B Fish farming question 1
Fish farming is often used to produce protein rich food.
Multi-trophic level aquaculture is a method of fish farming that has been developed to reduce environmental pollution and increase profits.
The diagram shows a multi-trophic level aquaculture system.
Explain how the multi-trophic level aquaculture system reduces environmental pollution, and increases the profits of fish farming.
Use information from the diagram and your own knowledge to support your answer.
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