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How a simple and stereotyped acoustic signal transmits individual information: the song of the White-browed Warbler Basileuterus leucoblepharus Anais da ABC (AABC)
Aubin,Thierry; Mathevon,Nicolas; Silva,Maria Luisa da; Vielliard,Jacques M.E.; Sebe,Frederic.
The White-browed Warbler Basileuterus leucoblepharus, a common bird of the BrazilianAtlantic forest, emits only one distinct song type in the context of territorial defense. Individual or neighbor-stranger recognition may be more difficult when birds share similar songs. In fact, the analysis of songs of different individuals reveals slight differences in the temporal and the frequency domains. Effectively, a careful examination of the signals of different individuals (21) by 5 complementary methods of analysis reveals first, that one or two gaps in frequency occur between two successive notes at different moments of the song, and second, that their temporal and frequency positions are stereotyped for each individual. Playback experiments confirm these...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bird acoustic communication; Individual information; Tropical forest.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200022
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A memory like a female Fur Seal: long-lasting recognition of pup's voice by mothers Anais da ABC (AABC)
Mathevon,Nicolas; Charrier,Isabelle; Aubin,Thierry.
In colonial mammals like fur seals, mutual vocal recognition between mothers and their pup is of primary importance for breeding success. Females alternate feeding sea-trips with suckling periods on land, and when coming back from the ocean, they have to vocally find their offspring among numerous similar-looking pups. Young fur seals emit a 'mother-attraction call' that presents individual characteristics. In this paper, we review the perceptual process of pup's call recognition by Subantarctic Fur Seal Arctocephalus tropicalis mothers. To identify their progeny, females rely on the frequency modulation pattern and spectral features of this call. As the acoustic characteristics of a pup's call change throughout the lactation period due to the growing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acoustic communication; Individual recognition; Learning process; Fur Seal; Mammals.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200007
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