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Updated: Jul 17, 2025
11:42
Bottlenose Dolphin Tursiops truncatus Spermatozoa: Collection, Cryopreservation, and Heterologous In Vitro Fertilization
Published on: August 21, 2017
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"Cooooooommmmmmmeeeeeeeee heeeerrrrrreeeee . . . . Momma dolphin has something to say"
1Psychology Department, St. Mary's University, San Antonio, TX, USA. hhill1@stmarytx.edu.
Learning & Behavior
|September 5, 2023
Summary
Mother dolphins use higher-pitched, wider-bandwidth whistles when calling separated calves during health assessments. This vocal adjustment may be a form of child-directed communication in cetaceans.
Area of Science:
- Marine Biology
- Animal Communication
- Cetacean Behavior
Background:
- Dolphin communication relies heavily on signature whistles.
- Vocal adjustments in parent-offspring interactions are observed across species.
Purpose of the Study:
- To investigate if mother dolphins alter their signature whistles when calling calves during specific separation scenarios.
- To compare vocalizations during separations with health assessments versus those without.
Main Methods:
- Recording and analyzing signature whistles of mother dolphins during separations.
- Comparing whistle characteristics (frequency, bandwidth) between different separation contexts.
Main Results:
- Mother dolphins produced higher frequency and wider bandwidth whistles when calling calves during separations involving health assessments.
- Vocalizations differed significantly compared to separations where the calf was not present or not undergoing assessment.
Conclusions:
- Mother dolphins modify their vocalizations, potentially adapting to their calf's needs during stressful situations.
- The observed whistle shift suggests a form of "child-directed communication" in dolphins, warranting further investigation into its function and parameters.
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