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Vocal variety in African penguins: Four basic vocalizations used for adult communication, two more for the young

Date:
July 30, 2014
Source:
PLOS
Summary:
Adult African penguins communicate using four different vocalizations and juveniles and chicks use two begging calls to request food.

This is an African penguin vocalising.
Credit: Favaro et al.; CC-BY

Adult African penguins communicate using four different vocalizations and juveniles and chicks use two begging calls to request food, according to a study published July 30, 2014 in the open-access journal PLOS ONE by Livio Favaro and colleagues from University of Turin, Italy.

African penguins vocalize to communicate with their parents, mates, and colony members; however, only basic descriptions of their calls currently exist. To further observe their vocal behavior, the authors of this study collected, categorized, and acoustically analyzed hundreds of audio and video vocal recordings from a large captive colony of penguins in Italy. In addition, they identified the behavioral contexts in which calls were made.

Results show that four basic vocalizations can be found in the auditory repertoire of the adult African penguin: a contact call emitted by isolated birds, an agonistic call used in aggressive interactions, an ecstatic display song uttered by single birds during the breeding season, and a mutual display song vocalized by pairs at their nests.

The authors also identified two distinct vocalizations interpreted as begging calls by nesting chicks (begging peep) and unweaned juveniles (begging moan). Since the colony is captive, the authors can't be sure they've identified all possible vocalizations, but they suggest this analysis helps to standardize known vocalizations that can be used in further study of these endangered seabirds.


Story Source:

The above story is based on materials provided by PLOS. Note: Materials may be edited for content and length.


Journal Reference:

  1. Favaro L, Ozella L, Pessani D. The Vocal Repertoire of the African Penguin (Spheniscus demersus): Structure and Function of Calls. PLoS ONE, 2014 DOI: 10.1371/journal.pone.0103460

Cite This Page:

PLOS. "Vocal variety in African penguins: Four basic vocalizations used for adult communication, two more for the young." ScienceDaily. ScienceDaily, 30 July 2014. <www.sciencedaily.com/releases/2014/07/140730151707.htm>.
PLOS. (2014, July 30). Vocal variety in African penguins: Four basic vocalizations used for adult communication, two more for the young. ScienceDaily. Retrieved September 23, 2014 from www.sciencedaily.com/releases/2014/07/140730151707.htm
PLOS. "Vocal variety in African penguins: Four basic vocalizations used for adult communication, two more for the young." ScienceDaily. www.sciencedaily.com/releases/2014/07/140730151707.htm (accessed September 23, 2014).

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