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Female indris determine the rhythmic structure of the song and sustain a higher cost when the chorus size increases

Articolo
Data di Pubblicazione:
2019
Abstract:
Among the behavioral traits shared by some nonhuman primate species and humans there is sing- ing. Unfortunately, our understanding of animals’ rhythmic abilities is still in its infancy. Indris are the only lemurs who sing and live in monogamous pairs, usually forming a group with their off- spring. All adult members of a group usually participate in choruses that are emitted regularly and play a role in advertising territorial occupancy and intergroup spacing. Males and females emit phrases that have similar frequency ranges but may differ in their temporal structure. We exam- ined whether the individuals’ contribution to the song may change according to chorus size, the total duration of the song or the duration of the individual contribution using the inter-onset inter- vals within a phrase and between phrases. We found that the rhythmic structure of indri’s songs depends on factors that are different for males and females. We showed that females have signifi- cantly higher variation in the rhythm of their contribution to the song and that, changes according to chorus size. Our findings indicate that female indris sustain a higher cost of singing than males when the number of singers increases. These results suggest that cross-species investigations will be crucial to understanding the evolutionary frame in which such sexually dimorphic traits occurred.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
chorus, coordination, duets, lemurs, singing, synchrony
Elenco autori:
De Gregorio, Chiara; Zanoli, Anna; Valente, Daria; Torti, Valeria; Bonadonna, Giovanna; Randrianarison, Rose Marie; Giacoma, Cristina; Gamba, Marco
Autori di Ateneo:
GAMBA Marco
GIACOMA Cristina
TORTI VALERIA
VALENTE Daria
Link alla scheda completa:
https://iris.unito.it/handle/2318/1688263
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1688263/469495/DeGregorio_et_al_2018_CZ.pdf
Pubblicato in:
CURRENT ZOOLOGY
Journal
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URL

https://watermark.silverchair.com/zoy058.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAAkswggJHBgkqhkiG9w0BBwagggI4MIICNAIBADCCAi0GCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMUZu7aXNKZ-9hSqlZAgEQgIIB_nxoybEaisDpzK0SymHg4W2YddBR8RuyVvEqnu6njUgLZAFyrJS75_3u3n9lrf-ogpqw1h4-tCoW1_wzDcxa31deCxbEoYNO6ihpBdLtWJtWgT3CRItUBYqlbbb1M_YnIBBI3dG5g_tyLO8QiAjSjoI5lUkyh2Nsq6QWTSYddnM8qzamToBTFVMBo3UfkOsOUOavgL1LZRzYgzCdupxCd0aS-Ombu2lbnaU9bFU2m9Gl31uRhZz12wAMQEDFP8cQMb8wbzmnRJa3kCzCmZ6KS7uvfeZxF5xsSN7Q8-68nyP5jjTqRtSc3xQdEOp1RG1YH4l85I-_VflXckT05a9rGWSDWDXKNQozLeqnD0Mjz3-jiFpb88yeBCRvTRJRUjLbgblcyASY7Jf7AxoXGm4vWgbvqwtSKNokL0EpGfTDGV4dEBaqk7HmAeurGmlMqwDcdQ2pGH6bgakCVJ-Tt0T6o4VZgJgzz4K2X8wXy9SQpXMElZ9C6oRZCcP_Cxr8JcyFve_Axn7EVieDETQ8A9ph8jM4FgVVQXK9Wimcj1AkT6kHivrIg0L6YyVXRxzI_au0bsVvgLEexNGW-d0zsAa1P2IBPweK2J9aewHVgOzouwNbdf9Cu_uuJfxKWS3ha_F2M0sN7tW-oyinwaUw5rjIn2xLvHEWPUEbQggmCU0PKg
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