Clownfish produce sounds to establish and defend their breeding status in social groups, but not to attract mates, according to research published November 7 in the open access journal PLOS ONE by Orphal Colleye and colleagues from the University of Liege, Belgium.
Previous studies showed that clownfish live in unique social groups, where the largest fish develops as a female, the second-largest is male, and the rest of the group remains gender neutral. If the largest fish dies, the rest of the group moves up a rank to replace the female and male.
This new research studies the importance of sounds made by the fish in this social structure, and finds that clownfish sounds are of two main kinds: aggressive calls made by charging and chasing fish, and sounds made by submissive fish. The authors also found that smaller fish produced shorter, higher frequency pulses of sound than larger fish.
According to the authors, these acoustic signals are especially significant for clownfish given the size-based hierarchy of their social structure.
Citation: Colleye O, Parmentier E (2012) Overview on the Diversity of Sounds Produced by Clownfishes (Pomacentridae): Importance of Acoustic Signals in Their Peculiar Way of Life. PLoS ONE 7(11): e49179. doi:10.1371/journal.pone.0049179
Financial Disclosure: This research was supported by the Takeda Science Foundation and a 21st Century Center of Excellence project entitled ''The Comprehensive Analyses on Biodiversity in Coral Reef and Island Ecosystems in Asian and Pacific Regions'' from the University of the Ryukyus via a Visiting Fellowship, by a grant entitled ''Concours des bourses de voyage 2009'' from ''Ministe`re de la Communaute´ franc¸aise de Belgique'' attributed to OC, and by a grant from Fonds de la Recherche Fondamentale Collective (FRFC) (no. 2.4.535.10.F) delivered by the Belgian National Fund for Scientific Research. OC was supported by a grant from the F.R.S.- FNRS (Bourse de Doctorat F.R.S.- FNRS). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Competing Interest Statement: The authors have declared that no competing interests exist.