Shrimp farming in coastal brackish water ponds is an important method of producing animal protein.
A shrimp farmer managing intensive coastal ponds notices several production challenges.
Suggest the cause of each problem and a solution for the farmer:
(i) An influx of predatory wading birds, such as herons, visiting the ponds.
(ii) A dangerous accumulation of toxic hydrogen sulfide (H2SH_2SH2S) and organic waste on the pond floor.
(iii) A rapid spread of a viral disease, such as White Spot Syndrome, among the shrimp.
Suggest two advantages of farming shrimp in controlled ponds compared to harvesting wild shrimp using marine trawlers.
74 exam-style questions on Edexcel IGCSE Biology Food production. Each one has a worked solution and a mark scheme showing where the marks go.