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Learning objective

Understand and assess the management techniques for harvesting marine species, including strategies such as net types and mesh sizes, species-specific methods like pole and line fishing, quotas, closed seasons, protected areas, conservation laws, and international agreements. Analyze case studies on the potential, exploitation, impact, and management of marine fisheries, as well as examples of marine species farming, focusing on food sources, waste pollution, and effects on natural habitats.

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Cambridge IGCSE Environmental ManagementOceans and fisheriesPractical objective

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Quick explanation

Understand and assess the management techniques for harvesting marine species, including strategies such as net types and mesh sizes, species-specific methods like pole and line fishing, quotas, closed seasons, protected areas, conservation laws, and international agreements. Analyze case studies on the potential, exploitation, impact, and management of marine fisheries, as well as examples of marine species farming, focusing on food sources, waste pollution, and effects on natural habitats

  • This point belongs to Management of the harvesting of marine species, especially Management of the harvesting of marine species outcomes.
  • You need to be able to understand and assess the management techniques for harvesting marine species, including strategies such as net types and mesh sizes, species-specific methods like pole and line fishing, quotas, closed seasons, protected areas, conservation laws, and international agreements. Analyze case studies on the potential, exploitation, impact, and management of marine fisheries, as well as examples of marine species farming, focusing on food sources, waste pollution, and effects on natural habitats.
  • The key ideas to know are Describe, Explain, and Discuss.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeExplainDiscussAnalyse

Why it matters

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Paper 1 structured question: Management of the harvesting of marine species

Paper 1TheoryPractical6 marks

Method

Method to Investigate Mesh Size Effect

1. Select three different mesh sizes: small, medium, and large. 2. Use identical fishing nets with these mesh sizes in the same fishing area. 3. Conduct fishing sessions of equal duration for each net. 4. Count and record the number of juvenile fish caught in each net. 5. Repeat the experiment three times for each mesh size to ensure reliability.

Mesh SizeNumber of Juvenile Fish Caught
Small
Medium
Large
  1. a

    Identify the independent variable in this investigation.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify the dependent variable in this investigation.

    Aim for approximately 1 distinct marking point.

    [1]
  3. c

    Suggest one control variable that should be kept constant in this investigation and explain why.

    Aim for approximately 2 distinct marking points.

    [2]
  4. d

    Explain why repeating the experiment three times improves the reliability of the results.

    Aim for approximately 2 distinct marking points.

    [2]
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