IB Biology HL D4.2.6 Sustainable Resource Harvesting Questions
Compare harvesting and replacement rates, then evaluate monitoring and international measures that keep fish stocks sustainable.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Assess sustainability by comparing harvesting rates with population replacement or recruitment rates, using maximum sustainable yield and quotas.
- Evaluate international agreements, protected areas, seasons and monitoring regulations as ways to conserve migratory fish stocks and maintain recovery.
IB Biology HL D4.2.6 Sustainable Resource Harvesting Questions question 1
The diagram shows levels of DDT, a pesticide, in an aquatic food web in Lake Kariba, Africa. Numbers represent ppm (parts per million) of DDT in fat tissue.
Discuss the impact of overfishing in Lake Kariba and how sustainable harvesting of resources can be assessed.
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