Study
Individual, unit and vocal clan level identity cues in sperm whale codas
Gero, S.; Whitehead, H.; Rendell, L.
Royal Society Open Science, 2016
Codas were recorded from photographically identified individual whales in known social units, and analysed to see which level of social structure — the individual, the unit, or the clan — each part of the pattern corresponded to.
- Studied in
- Physeter macrocephalus
- Sample size
- codas from identified individuals in Caribbean social units
Different coda types carry information at different levels. One type varied between individuals; others were shared across a social unit; the overall repertoire marked the clan.
What it means
The authors' reading, and ours. Where they differ, that difference is the point.
How the authors put it
Sperm whale codas encode identity simultaneously at several social scales rather than functioning as a single kind of signal.
How NatureHQ reads it
This is the study that makes the "alphabet" framing hard to sustain. If different coda types are doing identity work at different social levels, then the variation an analyst finds in a recording is at least partly about who is speaking rather than about what is being said. Any claim that the structure encodes meaning has to first subtract the structure that encodes identity, and that subtraction has not been done.
- One population, small number of identified individuals.
- Identity information being present does not exclude other information also being present.
- Assigning a coda to an individual underwater is difficult and a source of error.
What this study is used for on NatureHQ
One study can inform several subjects. Here is everywhere this one is cited.
Published by: The Royal SocietyPublished by the Royal Society.
Checked against Crossref on 2026-09-28, and they agree on the title, the authors and the year.
NatureHQ summarises research in its own words and does not reproduce published text. Reviewed 2026-08-31.