Cambridge International A Level · Marine Science (9693)

Marine aquaculture: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Marine aquaculture.

10 questions25 marksFree, no account

Question 1

1 mark

What is a primary requirement for the long-term success of a marine aquaculture project regarding the location of the facility?

Question 2

1 mark

A successful marine aquaculture project requires a high efficiency of use of feed. Why is this factor important for both economic and environmental reasons?

Question 3

1 mark

Consider the efficiency of use of feed in aquaculture. If a farmer switches from a feed with an FCR of 2.0 to a higher quality feed with an FCR of 1.5, what is the most significant environmental benefit?

Question 4

1 mark

Which of the following is a characteristic of intensive aquaculture systems, such as those used for Atlantic salmon?

Question 5

1 mark

How can the escape of cultured stock from an aquaculture facility negatively impact native wild populations?

Question 6

2 marks

Contrast the stocking density typically used in intensive salmon farming with that found in the extensive culture of marine mussels.

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Question 7

4 marks

An aquaculture firm reports a Feed Conversion Ratio (FCR) of \(1.2\) for their intensive salmon farm. Calculate the total mass of feed required to produce \(5000\) kg of salmon and suggest why a lower FCR is economically preferable.

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Question 8

5 marks

Discuss the ecological consequences of the overexploitation of feedstocks from wild fisheries to produce fishmeal for carnivorous aquaculture species like Atlantic salmon.

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Question 9

4 marks

(a) State whether the aquaculture of the blue mussel (Mytilus edulis) is usually classified as an intensive or extensive system. [1]

(b) Describe the process of collecting stock for a mussel farm, with reference to the term spat. [2]

(c) State one reason why the availability of clean water is essential for the successful culture of mussels. [1]

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Question 10

5 marks

(a) Explain how pollution from an intensive aquaculture facility can lead to the formation of anaerobic conditions in the benthos. [2]

(b) Discuss how the spread of disease is facilitated by high stocking densities in marine aquaculture. [3]

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