Culture Arena
Sweden · Nature & Wildlife · Hard
Swedish scientists determined the exact year when eels (ål) begin their migration from Lake Mälaren to the Sargasso Sea using what method?
Answer: Analysis of otoliths (ear stones) to count annual growth rings — Swedish researchers have studied the age and migration of the critically endangered European eel by examining growth rings in their otoliths.
- A Analysis of otoliths (ear stones) to count annual growth rings ✓
- B Satellite tracking tags
- C Genetic sampling of larvae
- D Radio telemetry
Swedish researchers have studied the age and migration of the critically endangered European eel by examining growth rings in their otoliths.