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IB ESS HL 4.3.12 Hl Fish Stock Assessment Questions

Interpret data used to assess fish stocks and sustainable harvest.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • identify how fishing effort, technology, stock recovery, predators, quotas and regulations can change capture-fishery catch
  • estimate maximum sustainable yield using biomass, population change, productivity and repeated sampling or mark-recapture data
  • interpret catch and stock data to assess overfishing, recovery and sustainable harvest limits

Learn this topic

Study 4.3.12 (HL)—Fish stock assessment conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 4.3.12 Hl Fish Stock Assessment Questions question 1

[Maximum number: 1]
Figure Global trends in the world's marine capture fishery stocks, 1974-2019

Figure Global trends in the world's marine capture fishery stocks, 1974-2019

Using Figure, calculate the percentage difference between the marine capture fishery stock considered overfished in 1974 and 2019.

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