Related Experiment Videos
Energy absorption from ocean waves: a free ride for cetaceans
1Naval Architectural Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St John's, Canada.
Summary
Whale flukes can harness ocean wave energy for swimming. An immature fin whale absorbed up to 33% of its power needs from waves, impacting cetacean migration energetics.
Area of Science:
- Marine biology
- Biomechanics
- Oceanography
Background:
- Cetaceans, including whales, exhibit remarkable adaptations for marine locomotion.
- Understanding energy acquisition is crucial for analyzing cetacean behavior and energetics.
Purpose of the Study:
- To quantify the energy absorption capability of cetacean flukes from ocean waves.
- To assess the contribution of wave energy to a fin whale's propulsive power.
Main Methods:
- Hydrodynamic analysis of fin whale fluke movement in simulated seaway conditions.
- Calculation of energy absorbed from waves at various sea states and swimming speeds.
Main Results:
- Fin whale flukes can absorb significant energy from ocean waves.
- An immature fin whale absorbed up to 25% (head seas) and 33% (following seas) of its propulsive power in Beaufort force 5 conditions.
- Wave energy absorption is dependent on sea state and swimming dynamics.
Conclusions:
- Wave energy absorption is a viable supplementary power source for cetaceans.
- This mechanism has significant implications for the energetic efficiency of cetacean migrations and foraging strategies.