|
|
|
|
| |
|
| |
|
|
| Arraut,Eduardo M.; Vielliard,Jacques M.E.. |
| The song of the Brazilian population of the Humpback Whale Megaptera novaeangliae was studied in its breeding and calving ground, the Abrolhos Bank, Bahia, Brazil, from July to November 2000. Aural and spectral analyses of digital recordings were completed for approximately 20 song cycles, totaling 5 hours of song from 10 different recording events. We identified 24 note types, organized in five themes. All songs presented the same themes and the order in which they were sung did not vary. We registered the appearance of a note type and the disappearance of a phrase ending, which indicate that the song changed as the season progressed. Moreover, we detected individual variation in the way singers performed certain complex note types. As songs are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Humpback Whale; Megaptera novaeangliae; Song; Brazilian population; 2000; Individual song variation. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200028 |
| |
|
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| Boscolo,Danilo; Metzger,Jean Paul; Vielliard,Jacques M.E.. |
| Playback of bird songs is a useful technique for species detection; however, this method is usually not standardized. We tested playback efficiency for five Atlantic Forest birds (White-browed Warbler Basileuterus leucoblepharus, Giant Antshrike Batara cinerea, Swallow-tailed Manakin Chiroxiphia caudata, Whiteshouldered Fire-eye Pyriglena leucoptera and Surucua Trogon Trogon surrucura) for different time of the day, season of the year and species abundance at the Morro Grande Forest Reserve (South-eastern Brazil) and at thirteen forest fragments in a nearby landscape. Vocalizations were broadcasted monthly at sunrise, noon and sunset, during one year. For B. leucoblepharus, C. caudata and T. surrucura, sunrise and noon were more efficient than sunset.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Playback; Birds; Forest fragments; Methodology development; Atlantic forest; São Paulo State. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000400003 |
| |
|
|
|
