Vol. 14 No. 3 (1996), Articles
Vol. 14 No. 3 (1996)

Evaluation of the alerted detection hypothesis in the song of the Rufous Collared Sparrow. I. Experiments with complete and sectioned songs

Articles
Published 01-10-1996
Pablo L. Tubaro
Laboratorio de Biología del Comportamiento. Instituto de Biología y Medicina Experimental. Obligado 2490 (1428) Buenos Aires. Argentina
Fabian M. Gabelli
Laboratorio de Biología del Comportamiento. Instituto de Biología y Medicina Experimental. Obligado 2490 (1428) Buenos Aires. Argentina
I. M. Mozetich
Laboratorio de Biología del Comportamiento. Instituto de Biología y Medicina Experimental. Obligado 2490 (1428) Buenos Aires. Argentina
Enrique T. Segura
Laboratorio de Biología del Comportamiento. Instituto de Biología y Medicina Experimental. Obligado 2490 (1428) Buenos Aires. Argentina
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Keywords

Zonotrichia capensis
playbacks
alerted detection
Rufous-collared Sparrows
song

How to Cite

Tubaro, Pablo L., Fabian M. Gabelli, I. M. Mozetich, and Enrique T. Segura. 1996. “Evaluation of the Alerted Detection Hypothesis in the Song of the Rufous Collared Sparrow. I. Experiments With Complete and Sectioned Songs”. El Hornero 14 (3): 27-34. https://doi.org/10.56178/eh.v14i3.994.
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Abstract

The Alerted Detection Hypothesis suggests that the bird-song structure is adaptive for long-range communication in a noisy environment. According to this hypothesis, the introductory part of the song may act as an "alerting" element, which warns potential receptors about the arrival of the informative portion of the signal, contained in the remaining parts of the song. We evaluated the Alerted Detection Hypothesis in the Rufous-collared Sparrow (Zonotrichia capensis) using a playback design with complete songs as well as their isolated constitutive parts (theme and trill). The Rufous-collared Sparrows responded more to the complete songs than to the themes and trills. However, both themes and trills evoked a similar response. These results contrast with those predicted by the Alerted Detection Hypothesis, which states that only complete songs and trills would have elicited significant responses of similar intensity.

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