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Titre du document / Document title

Acoustic signals of solitary dugongs : physical characteristics and behavioral correlates

Auteur(s) / Author(s)

ANDERSON P. K. ; BARCLAY R. M. R. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

Univ. Calgary, dep. biological sci., Calgary AB T2N 1N4, CANADA

Résumé / Abstract

We describe frequency and amplitude patterns of sounds produced by individually identifiable wild dugongs (Dugong dugon) in Shark Bay, Western Australia. Chirp-squeaks, barks, trills, and sounds transitional between chirp-squeaks and barks and trills (prebarks and pretrills) are defined. Chirp-squeaks are frequency-modulated signals in the 3 to 18-kHz range lasting ca. 60 ms. Trills last as long as 2,200 ms, are frequency-modulated over a bandwidth of 740 Hz within the 3-18-kHz band, and have two to four or more harmonics. Barks are broadband signals of 500 to 2,200 Hz lasting 30-120 ms with up to five harmonics. Dugongs may produce all of these sounds in the frontal region of the head rather than in the larynx. Chirp-squeaks, recorded from at least nine individuals, were emitted as dugongs rooted in the bottom or patrolled mutually exclusive activity zones, but not when dugongs were stationary or were investigating the research vessel. Frequency and amplitude modulation of chirp-squeaks suggests a ranging function. Variability among individuals in chirp-squeak characteristics may be adequate for a signature function. Barks have physical characteristics appropriate for aggressive behavior. They were recorded in circumstances suggesting territorial defense. Trills had characteristics more appropriate to affiliative functions and were associated with movements that appeared to be displays.

Revue / Journal Title

Journal of mammalogy    ISSN  0022-2372   CODEN JOMAAL 

Source / Source

1995, vol. 76, no4, pp. 1226-1237 (24 ref.)

Langue / Language

Anglais

Editeur / Publisher

Allen Press, Lawrence, KS, ETATS-UNIS  (1919) (Revue)

Mots-clés anglais / English Keywords

Sound production

;

Spectral analysis

;

Interindividual comparison

;

Aggressiveness

;

Agonistic behavior

;

Territorial behavior

;

Affiliation

;

Field study

;

Marine environment

;

Australia

;

Indian Ocean

;

Acoustic communication

;

Animal communication

;

Social interaction

;

Oceania

;

Sirenia

;

Mammalia

;

Vertebrata

;

Mots-clés français / French Keywords

Emission sonore

;

Analyse spectrale

;

Comparaison interindividuelle

;

Agressivité

;

Comportement agonistique

;

Comportement territorial

;

Affiliation

;

Etude sur terrain

;

Milieu marin

;

Australie

;

Océan Indien

;

Dugong dugon

;

Dugongidae

;

Communication sonore

;

Communication animale

;

Interaction sociale

;

Océanie

;

Sirenia

;

Mammalia

;

Vertebrata

;

Mots-clés espagnols / Spanish Keywords

Emisión sonora

;

Análisis espectral

;

Comparación interindividual

;

Agresividad

;

Conducta agonística

;

Conducta territorial

;

Afiliación

;

Estudio en campo

;

Medio marino

;

Australia

;

Océano Indico

;

Comunicación sonora

;

Comunicación animal

;

Interacción social

;

Oceania

;

Sirenia

;

Mammalia

;

Vertebrata

;

Localisation / Location

INIST-CNRS, Cote INIST : 3037, 35400005999595.0250

Nº notice refdoc (ud4) : 2924260



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