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https://repositorio.inpa.gov.br/handle/1/17568| Título: | Acoustic characteristics of biosonar sounds of free-ranging botos (Inia geoffrensis) and tucuxis (Sotalia fluviatilis) in the Negro River, Amazon, Brazil |
| Autor: | Yamamoto, Yukiko Akamatsu, Tomonari Silva, Vera Maria Ferreira da Yoshida, Yayoi Kohshima, Shiro |
| Palavras-chave: | Acoustics Acoustic Characteristic Acoustic Events Apparent Source Broadband Signal Echolocation Clicks High Frequency Hf Hydrophone Arrays Sound Production Sonar Anatomy And Histology Animals Body Size Comparative Study Dolphin Echolocation Female Head Male Physiology River Sound Detection Species Difference Animal Body Size Dolphins Echolocation Female Head Male Rivers Sound Spectrography Species Specificity |
| Data do documento: | 2015 |
| Revista: | Journal of the Acoustical Society of America |
| É parte de: | Volume 138, Número 2, Pags. 687-693 |
| Abstract: | Odontoceti emit broadband high-frequency clicks on echolocation for orientation or prey detection. In the Amazon Basin, two odontoceti species, boto (Amazon River dolphin, Inia geoffrensis) and tucuxi (Sotalia fluviatilis), live sympatrically. The acoustic characteristics of the echolocation clicks of free-ranging botos and tucuxis were measured with a hydrophone array consisting of a full-band and an acoustic event recorder (A-tag). The clicks of the two species were short-duration broadband signals. The apparent source level was 201 dB 1 μPa peak-to-peak at 1 m in the botos and 181 dB 1 μPa peak-to-peak at 1 m in the tucuxis, and the centroid frequency was 82.3 kHz in the botos and 93.1 kHz in the tucuxis. The high apparent source level and low centroid frequency are possibly due to the difference in body size or sound production organs, especially the nasal structure, the sound source of clicks in odontoceti. © 2015 Acoustical Society of America. |
| DOI: | 10.1121/1.4926440 |
| Aparece nas coleções: | Artigos |
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