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March 22, 2026Scientific ReportsOpen Access

Identification and classification of repeated whistle types from free-ranging rough-toothed dolphins (Steno bredanensis)

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Authors

LRL. RedaelliVJVincent M. JanikFAFilipe Alves

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Overview

Analysis identifies and classifies reiterative whistles in rough-toothed dolphins, suggesting roles in social cohesion.

Key Points

  • The central aim is to analyze and classify the characteristics and functions of repeated whistles in rough-toothed dolphins.
  • Analyzed acoustic recordings from encounters with rough-toothed dolphins in summer 2023.
  • Classified 1015 repeated whistles into 25 categories based on frequency modulation contours.
  • Conducted inter-observer reliability tests to verify visual classifications.
  • Compared visual classifications with results from an unsupervised neural network (ARTwarp).
  • Identified 25 categories of repeated whistles with varying degrees of stereotypy.
  • Degree of stereotypy in rough-toothed dolphins is generally lower than in other dolphin species.
  • Findings suggest that repeated whistles may serve to maintain social cohesion within groups.

Cite This Study

Redaelli et al. (2026) studied this question.

synapsesocial.com/papers/69bf86ecf665edcd009e8fc5https://doi.org/10.1038/s41598-026-44853-2
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Structural Variation in Whistle Patterns of Two Coastal Dolphin Species Co‐Occurring in the Southern Israeli Mediterranean Sea2026
  2. 2Identifying Dolphin Whistle Producers With Deep Learning: Moving Beyond Signature Whistles2026
  3. 3Inconsistent functions of the same sound category in odontocetes2025
  4. 4Advancing Dolphin Acoustic Monitoring: A Comprehensive Whistle Classification Framework2026
  5. 5Acoustic Identity: Linking Signature Whistles and Visual Identification in a Threatened Dolphin Population2025