Evidence of social learning across symbolic cultural barriers in sperm whales
summary
Analysis of inter‑click intervals tokenized into symbols builds variable-length Markov trees to compare repertoires from Dominica and the Pacific and finds that identity codas (about 30–40% identity codas of repertoires) diverge as clans spatially overlap while non‑identity codas converge in vocal style, implying cross‑clan social learning. Memory depth peaks at ~2–3 clicks. Work pairs acoustic distances with drone video and drones and suction tags that log sounds and social networks, captures a birth, and yields promising but still behavior-limited evidence.
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chapters (14)
- 0:00Sperm whale communication research
- 1:23Sperm whales and alien intelligence
- 3:29Social learning from whaler logbooks
- 5:23Acoustic navigation in deep ocean
- 6:47Decoding whale codas and social function
- 8:52Coda structure and symbolic communication
- 15:58Vocal repertoires and clan identity
- 20:42Modeling coda sequences
- 23:52Vocal style differences
- 26:59Symbolic boundaries and social learning
- 30:07Next steps for CETI
- 31:29Tagging and drone technology
- 33:37First sperm whale birth
- 35:29Q&A
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