IB Biology HL 4.1.2 Population sampling and conservation Question Bank
Practise IB Biology HL 4.1.2 by evaluating field methods used to estimate and manage wild populations.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Compare quadrats, transects and mark-recapture for estimating populations.
- Evaluate sampling limitations and evidence used in sustainable fisheries management.
C4.1.2—Population size estimation question 1
[Maximum number: 2]
The Atlantic cod is considered in many countries to be endangered due to overfishing. Describe two methods that could be used to estimate the cod population.
record size of catches from fishing boats;
capture, tagging, releasing and recapturing fish / Lincoln index; sample fishes with trawling nets; estimate population with echo sounder/sonar/fish finder;
Marking guidance:
Award marks only for the first two methods if more than two written.
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