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Behavioral Ecology and Sociobiology

, Volume 40, Issue 5, pp 277–285 | Cite as

Group-specific dialects and geographical variation in coda repertoire in South Pacific sperm whales

  • Linda Weilgart
  • H. Whitehead

Abstract

Codas, which are patterned series of clicks, were recorded from female and immature sperm whales (Physeter macrocephalus) in a number of locations around the South Pacific Ocean and in the Caribbean Sea. Using K-means cluster analysis, 3,644 codas were categorized based on the number of clicks and their patterning. There were 30 resulting types of coda. The numbers of codas of the different types recorded were used to construct repertoires for each recording session, day, group of whales, place, area, and ocean. Strong group-specific dialects, which seem to persist over periods of years, were apparent, overlaid on weaker geographical variation. Significant differences in repertoire were found between the Caribbean and the Pacific Ocean. Sperm whales now join killer whales (Orcinus orca) as the only cetacean species in which dialects (differences in vocal repertoire among neighboring, potentially interacting groups) have been found.

Key wordsPhysetermacrocephalus    Sperm whale   Dialects   Communication   Codas 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Linda Weilgart
    • 1
  • H. Whitehead
    • 2
  1. 1.Bioacoustics Research Program, Cornell Laboratory of Ornithology, 159 Sapsucker Woods Road, Ithaca, NY 14850, USAUS
  2. 2.Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada Tel: (902) 494-3723; Fax: (902) 494-3736; e-mail: HWHITEHE@IS.DAL.CACA

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