Fish farming methods?
Reveal answer
Water quality + feed + no predators + disease control + separate species.
Key words: disease
6(a) FOOD PRODUCTION · RECALL
6.9B Fish farming
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Why are fish efficient food converters?
Reveal answer
They are ectothermic → less heat lost.
Key words: ectothermic
What is meant by the term intraspecific predation?
Reveal answer
Predation between members of the same species.
Key words: intraspecific predation
What is meant by the term interspecific predation?
Reveal answer
Predation by a member of a different species.
Key words: interspecific predation
What is meant by the term aquaculture?
Reveal answer
Farming of fish and other aquatic organisms.
Key words: aquaculture
Fish farming methods, Maintaining water quality. How it is done? Benefit for yield?
Reveal answer
How it is done: Filtering, aeration, monitoring. Benefit for yield: Enough oxygen; no toxic build-up.
Key words: Maintaining water quality
Fish farming methods, Controlling intraspecific predation. How it is done? Benefit for yield?
Reveal answer
How it is done: Separate fish by size/age. Benefit for yield: Fewer fish eaten by larger ones.
Key words: Controlling intraspecific predation
Fish farming methods, Controlling interspecific predation. How it is done? Benefit for yield?
Reveal answer
How it is done: Nets and enclosures. Benefit for yield: Fewer losses to birds and other predators.
Key words: Controlling interspecific predation
Fish farming methods, Controlling disease. How it is done? Benefit for yield?
Reveal answer
How it is done: Vaccines, quarantine, treatments. Benefit for yield: Fewer deaths in crowded conditions.
Key words: Controlling disease
Fish farming methods, Removing waste. How it is done? Benefit for yield?
Reveal answer
How it is done: Flowing water, filters. Benefit for yield: Prevents ammonia build-up and oxygen depletion.
Key words: Removing waste
Fish farming methods, Controlled feeding. How it is done? Benefit for yield?
Reveal answer
How it is done: Measured, high-protein food. Benefit for yield: Fast growth with little waste.
Key words: Controlled feeding
Fish farming methods, Selective breeding. How it is done? Benefit for yield?
Reveal answer
How it is done: Breed fast-growing, docile fish. Benefit for yield: Better growth and survival.
Key words: Selective breeding
True or false, and why? “More food always means faster growth.”
Reveal answer
False. Uneaten food pollutes water and lowers oxygen as it decomposes.
True or false, and why? “Intraspecific and interspecific predation mean the same thing.”
Reveal answer
False. Intra- is within the same species; inter- is between different species.
True or false, and why? “Fish farming has no effect on wild fish.”
Reveal answer
False. Waste, escapes, disease and parasites can spread to wild populations.