Vocalizations of amazon river dolphins, Inia Geoffrensis: Insights into the evolutionary origins of delphinid whistles
Oceanic dolphins (Odontoceti: Delphinidae) produce tonal whistles, the structure and function of which have been fairly well characterized. Less is known about the evolutionary origins of delphinid whistles, including basic information about vocal structure in sister taxa such as the Platanistidae r...
| Autor principal: | Podos, Jeffrey |
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| Outros Autores: | Silva, Vera Maria Ferreira da, Rossi-Santos, Marcos Roberto |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Ethology
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19053 |
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oai:repositorio:1-19053 |
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dspace |
| spelling |
oai:repositorio:1-19053 Vocalizations of amazon river dolphins, Inia Geoffrensis: Insights into the evolutionary origins of delphinid whistles Podos, Jeffrey Silva, Vera Maria Ferreira da Rossi-Santos, Marcos Roberto Dolphin Evolution Vocalization Coryphaenidae Delphinidae Inia Inia Geoffrensis Odontoceti Platanistidae Sotalia Fluviatilis Oceanic dolphins (Odontoceti: Delphinidae) produce tonal whistles, the structure and function of which have been fairly well characterized. Less is known about the evolutionary origins of delphinid whistles, including basic information about vocal structure in sister taxa such as the Platanistidae river dolphins. Here we characterize vocalizations of the Amazon River dolphin (Inia geoffrensis), for which whistles have been reported but not well documented. We studied Inia at the Mamirauá Sustainable Development Reserve in central Brazilian Amazônia. During 480 5-min blocks (over 5 weeks) we monitored and recorded vocalizations, noted group size and activity, and tallied frequencies of breathing and pre-diving surfaces. Overall, Inia vocal output correlated positively with pre-diving surfaces, suggesting that vocalizations are associated with feeding. Acoustic analyses revealed Inia vocalizations to be structurally distinct from typical delphinid whistles, including those of the delphinid Sotalia fluviatilis recorded at our field site. These data support the hypothesis that whistles are a recently derived vocalization unique to the Delphinidae. 2020-06-15T22:04:58Z 2020-06-15T22:04:58Z 2002 Artigo https://repositorio.inpa.gov.br/handle/1/19053 10.1046/j.1439-0310.2002.00800.x en Volume 108, Número 7, Pags. 601-612 Restrito Ethology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Dolphin Evolution Vocalization Coryphaenidae Delphinidae Inia Inia Geoffrensis Odontoceti Platanistidae Sotalia Fluviatilis |
| spellingShingle |
Dolphin Evolution Vocalization Coryphaenidae Delphinidae Inia Inia Geoffrensis Odontoceti Platanistidae Sotalia Fluviatilis Podos, Jeffrey Vocalizations of amazon river dolphins, Inia Geoffrensis: Insights into the evolutionary origins of delphinid whistles |
| topic_facet |
Dolphin Evolution Vocalization Coryphaenidae Delphinidae Inia Inia Geoffrensis Odontoceti Platanistidae Sotalia Fluviatilis |
| description |
Oceanic dolphins (Odontoceti: Delphinidae) produce tonal whistles, the structure and function of which have been fairly well characterized. Less is known about the evolutionary origins of delphinid whistles, including basic information about vocal structure in sister taxa such as the Platanistidae river dolphins. Here we characterize vocalizations of the Amazon River dolphin (Inia geoffrensis), for which whistles have been reported but not well documented. We studied Inia at the Mamirauá Sustainable Development Reserve in central Brazilian Amazônia. During 480 5-min blocks (over 5 weeks) we monitored and recorded vocalizations, noted group size and activity, and tallied frequencies of breathing and pre-diving surfaces. Overall, Inia vocal output correlated positively with pre-diving surfaces, suggesting that vocalizations are associated with feeding. Acoustic analyses revealed Inia vocalizations to be structurally distinct from typical delphinid whistles, including those of the delphinid Sotalia fluviatilis recorded at our field site. These data support the hypothesis that whistles are a recently derived vocalization unique to the Delphinidae. |
| format |
Artigo |
| author |
Podos, Jeffrey |
| author2 |
Silva, Vera Maria Ferreira da Rossi-Santos, Marcos Roberto |
| author2Str |
Silva, Vera Maria Ferreira da Rossi-Santos, Marcos Roberto |
| title |
Vocalizations of amazon river dolphins, Inia Geoffrensis: Insights into the evolutionary origins of delphinid whistles |
| title_short |
Vocalizations of amazon river dolphins, Inia Geoffrensis: Insights into the evolutionary origins of delphinid whistles |
| title_full |
Vocalizations of amazon river dolphins, Inia Geoffrensis: Insights into the evolutionary origins of delphinid whistles |
| title_fullStr |
Vocalizations of amazon river dolphins, Inia Geoffrensis: Insights into the evolutionary origins of delphinid whistles |
| title_full_unstemmed |
Vocalizations of amazon river dolphins, Inia Geoffrensis: Insights into the evolutionary origins of delphinid whistles |
| title_sort |
vocalizations of amazon river dolphins, inia geoffrensis: insights into the evolutionary origins of delphinid whistles |
| publisher |
Ethology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19053 |
| _version_ |
1787142282055516160 |
| score |
11.755432 |