Evidence map›Paper›PMID 30697244›Full record

ArticleCurrent zoology2019

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

Chiara De Gregorio, Anna Zanoli, Daria Valente, Valeria Torti, Giovanna Bonadonna, Rose Marie Randrianarison, Cristina Giacoma, Marco Gamba

Abstract read
In one paragraph

Article in Current zoology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed.

  1. Article
  2. Article
  3. Singing out of tune: sexual and developmental differences in the occurrence of nonlinear phenomena in primate songs.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  4. Article
  5. Article
  6. Who you live with and what you duet for: a review of the function of primate duets in relation to their social organization.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024
    Review
  7. Article
  8. Article
  9. Article
  10. Isochrony and rhythmic interaction in ape duetting.Proceedings. Biological sciences · 2023
    Article
  11. Article
  12. Vocal accommodation in penguins (Proceedings. Biological sciences · 2022
    Article
  13. Article
  14. Article
  15. Rhythm in speech and animal vocalizations: a cross-species perspective.Annals of the New York Academy of Sciences · 2019
    Review
  16. Article
  17. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Chiara De GregorioDipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, via Accademia Albertina, Torino, Italia.
Anna ZanoliDipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parma, Italia.
Daria ValenteDipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, via Accademia Albertina, Torino, Italia.
Valeria TortiDipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, via Accademia Albertina, Torino, Italia.
Giovanna BonadonnaDipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, via Accademia Albertina, Torino, Italia.
Rose Marie RandrianarisonGroup d'Etude et de Recherche sur les Primates de Madagascar (GERP), Antananarivo, Madagascar.
Cristina GiacomaDipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, via Accademia Albertina, Torino, Italia.
Marco GambaDipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, via Accademia Albertina, Torino, Italia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Among the behavioral traits shared by some nonhuman primate species and humans there is singing. 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 offspring. 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 examined 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 intervals 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 significantly 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.

Indexed as

choruscoordinationduetslemurssingingsynchrony

Identifiers

PMID30697244
PMCPMC6347063

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.