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Undulation frequency affects burial performance in living and model flatfishes.
Amberle McKee1, Ian MacDonald2, Stacy C Farina3
1Department of Ecology and Evolutionary Biology, University of California at Irvine, 321 Steinhaus Hall, Irvine, CA 92697, USA.
Zoology (Jena, Germany)
|January 15, 2016
Summary
Flatfish use body undulations to bury themselves in sand for camouflage and hunting. Higher undulation frequencies increase sand coverage, with 10Hz being sufficient for effective burial.
Area of Science:
- Marine Biology
- Biomechanics
- Animal Behavior
Background:
- Flatfishes utilize sand burial for predator avoidance and prey ambushing.
- Understanding the mechanics of flatfish burial is crucial for ecological studies.
Purpose of the Study:
- To investigate the role of body undulation frequency in flatfish burial.
- To determine the optimal undulation frequency for effective sand coverage.
Main Methods:
- High-speed video analysis of five flatfish species during burial.
- Development of a physical model to isolate the effect of undulation frequency.
- Testing actuated dead flatfish and live flatfish in a sandy environment.
Main Results:
- Increased undulation frequency enhanced sand coverage in both models and dead flatfish.
- A frequency of 10Hz was sufficient for complete burial in models and live flatfish.
- Live flatfish exhibited superior burial ability compared to models, attributed to median fin action.
Conclusions:
- Body undulation is a key mechanism for flatfish burial.
- Median fin movements contribute significantly to the efficiency of live flatfish burial.
- Undulation frequency is a critical factor influencing the effectiveness of sand burial in flatfishes.
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