A new aquaculture feed for farmed salmon has been developed to replace traditional fish meal made from wild-caught marine fish. This new feed contains mealworms (insects). In the production facility, these mealworms are reared on waste spent grain from breweries.
Sketch a pyramid of biomass for the food chain that results in biomass for the salmon. Label all three levels of the pyramid.
Describe two reasons why the biomass of the mealworms consumed by the salmon does not all become biomass of the salmon.
Explain how producing fish feed from mealworms fed on brewery waste, rather than using wild-caught fish, can improve human food security in the future.
61 exam-style questions on AQA GCSE Biology 7.4 Trophic levels in an ecosystem, covering 7.4.1 Trophic levels, 7.4.2 Pyramids of biomass, and 7.4.3 Transfer of biomass. Each one has a worked solution and a mark scheme showing where the marks go.