Aquaculture — AS & A Level Marine Science (9693) questions by topic
Atlantic salmon osmoregulation in sea water, the case for international cooperation to conserve migratory salmon, and the changing mix of raw materials in salmon feed pellets are the kind of demands this Marine Science topic sets, across marks of 6 to 17.
Suggest, explain, state, describe and calculate are the top command words, with suggest expecting a reasoned possibility grounded in the scenario rather than a generic point. The 21 real questions gathered here run from 2023 to 2025 papers, and because aquaculture questions often combine a diagram with written reasoning, instant marking is a fast way to check whether a suggested reason is specific enough to the salmon life cycle described.
May–June 2025, Paper 31
Salmon aquaculture can take place on land and in sea cages. In both places the salmon are fed on pellets. Fig. 3.1 shows the percentage of raw materials used in salmon feed…
Answer this question and get it marked →Discuss the advantages and disadvantages of releasing adult salmon produced in a hatchery into the ocean.
Answer this question and get it marked →May–June 2025, Paper 32
Phytoplankton blooms occur naturally in some aquaculture ponds and can affect the concentration of dissolved oxygen. Aquaculture ponds can be extensive (low stock density with no…
Answer this question and get it marked →Atlantic salmon (Salmo salar) are euryhaline. They are born in freshwater rivers, migrate to the sea, and then return to freshwater to breed. Fig. 4.1 shows osmoregulation in an…
Answer this question and get it marked →May–June 2025, Paper 33
Phytoplankton blooms occur naturally in some aquaculture ponds and can affect the concentration of dissolved oxygen. Aquaculture ponds can be extensive (low stock density with no…
Answer this question and get it marked →Atlantic salmon (Salmo salar) are euryhaline. They are born in freshwater rivers, migrate to the sea, and then return to freshwater to breed. Fig. 4.1 shows osmoregulation in an…
Answer this question and get it marked →May–June 2024, Paper 32
Providing efficient aeration is a key requirement for aquaculture systems. (i) Explain why efficient aeration is important in aquaculture systems. [2] (ii) Explain why efficient…
Answer this question and get it marked →Salmon aquaculture usually involves two different stages: - breeding adult salmon in tanks in a hatchery, where fry are raised to smolt - transferring smolt to net cages in…
Answer this question and get it marked →May–June 2024, Paper 33
Providing efficient aeration is a key requirement for aquaculture systems. (i) Explain why efficient aeration is important in aquaculture systems. [2] (ii) Explain why efficient…
Answer this question and get it marked →Salmon aquaculture usually involves two different stages: - breeding adult salmon in tanks in a hatchery, where fry are raised to smolt - transferring smolt to net cages in…
Answer this question and get it marked →May–June 2024, Paper 41
Shrimp aquaculture is used to supply seafood. Mussels have been used to filter waste water from shrimp tanks before it is released into the sea. Outline the process of shrimp…
Answer this question and get it marked →Atlantic salmon migrate between rivers and the open ocean. Scientists have suggested that international cooperation is needed to conserve salmon populations. Explain why…
Answer this question and get it marked →October–November 2024, Paper 31
Fish farms use feed pellets containing fishmeal to supply protein to farmed fish. State why a high protein content is required in the fish feed.
Answer this question and get it marked →October–November 2024, Paper 32
Fish farms use feed pellets containing fishmeal to supply protein to farmed fish. State why a high protein content is required in the fish feed.
Answer this question and get it marked →October–November 2024, Paper 33
Fish farms use feed pellets containing fishmeal to supply protein to farmed fish. State why a high protein content is required in the fish feed.
Answer this question and get it marked →October–November 2023, Paper 31
Disease management is important in aquaculture. Describe methods that can be used to prevent and control disease in aquaculture.
Answer this question and get it marked →October–November 2023, Paper 32
Disease management is one of the factors required for the long-term success of an aquaculture project. Explain the need for disease management and describe the different methods…
Answer this question and get it marked →October–November 2023, Paper 33
Disease management is one of the factors required for the long-term success of an aquaculture project. Explain the need for disease management and describe the different methods…
Answer this question and get it marked →October–November 2023, Paper 41
Salmon are grown commercially around coastal areas using extensive aquaculture systems called salmon farms. Outline the process of salmon aquaculture in extensive systems.
Answer this question and get it marked →October–November 2023, Paper 42
Salmon are grown commercially around coastal areas using extensive aquaculture systems called salmon farms. Outline the process of salmon aquaculture in extensive systems.
Answer this question and get it marked →October–November 2023, Paper 43
Salmon are grown commercially around coastal areas using extensive aquaculture systems called salmon farms. Outline the process of salmon aquaculture in extensive systems.
Answer this question and get it marked →Other AS & A Level Marine Science topics
- Marine organisms and physiology (58)
- Water and physical oceanography (43)
- Mangroves and coastal ecosystems (37)
- Marine ecosystems and energy flow (36)
- Investigative skills (28)
- Fisheries and mariculture (26)
- Human impacts and pollution (16)
- Classification and biodiversity (14)
- Coral reefs (14)
- Earth structure and plate tectonics (12)
- Conservation and management (11)