INSTITUTO DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Unidad Ejecutora - UE
Underwater acoustic communication in the macrophagic carnivorous larvae of Ceratophrys ornata (Anura: Ceratophrydae).
NATALE, G. S., L. ALCALDE, R. HERRERA, R. CAJADE, E. F. SCHAEFER, F. MARANGONI & V. L. TRUDEAU.
Acta Zoologica (Stockholm)
Lugar: Stockholm; Año: 2009
We provide the first evidence for sound production by anuran larvae. In thisstudy, we describe the sounds, their context-specific emission and the structuresrelated to sound production of the carnivorous larvae of Ceratophrys ornata(Amphibia, Anura, Ceratophryidae). Tadpoles emit a brief, clear and very audiblemetallic-like sound that consists of a short train of notes that occur at allstages of larval development. Tadpoles make sound only when a conspecific tadpoleis preying upon it or when touched by an object. Ceratophrys ornata larvaepossess the basic required anatomical structures for sound production via expulsionof atmospheric air from the lungs through the open soft-tissue glottis. Theglottis is opened and closed via the larval laryngeal muscles (constrictor laryngisand dilatator laryngis). The arytenoid cartilages appear at stage 40 and the cricoidcartilage does at stage 43. Adult laryngeal muscles differentiate from the larvalones at stage 46 together with the vocal sac formation from the adultinterhyoideus muscle. We demonstrate (n = 2160 conspecific predatorpreyinteractions) that larval sounds occur always under predatory attack, probablyserving to diminish the chances of cannibalism. These data raise the possibilitythat other macrophagic carnivorous anuran larvae may produce sound.