Evidence map›Paper›PMID 31847748›Full record

ArticleBiology letters2019

Chimpanzees use tree species with a resonant timbre for accumulative stone throwing.

Ammie K Kalan, Eleonora Carmignani, Richard Kronland-Martinet, Sølvi Ystad, Jacques Chatron, Mitsuko Aramaki

Abstract read
In one paragraph

Article in Biology letters, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed.

  1. Sticks and Stones: Hand Preference and Grip in Wild Chimpanzee Tool-Use.American journal of biological anthropology · 2026
    Article
  2. Review
  3. Article
  4. Article
  5. Review
  6. Article
  7. Individual preferences for sound tool design in a parrot.Proceedings. Biological sciences · 2023
    Article
  8. Article
  9. Article
  10. Sociality predicts orangutan vocal phenotype.Nature ecology & evolution · 2022
    Article
  11. Article
  12. Spontaneous (minimal) ritual in non-human great apes?Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2020
    Review
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

6 authors.

Ammie K KalanDepartment of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany.
Eleonora CarmignaniDepartment of Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany.
Richard Kronland-MartinetAix Marseille University, CNRS, PRISM (Perception, Representations, Image, Sound, Music), 31, Chemin Joseph Aiguier, CS 70071, 13402 Marseille Cedex 09, France.
Sølvi YstadAix Marseille University, CNRS, PRISM (Perception, Representations, Image, Sound, Music), 31, Chemin Joseph Aiguier, CS 70071, 13402 Marseille Cedex 09, France.
Jacques ChatronAix Marseille University, CNRS, Centrale Marseille, LMA, 4 impasse Nikola Tesla, CS 40006, 13453 Marseille Cedex 13, France.
Mitsuko AramakiAix Marseille University, CNRS, PRISM (Perception, Representations, Image, Sound, Music), 31, Chemin Joseph Aiguier, CS 70071, 13402 Marseille Cedex 09, France.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Animals use tools for communication relatively rarely compared to tool use for extractive foraging. We investigated the tool-use behaviour accumulative stone throwing (AST) in wild chimpanzees, who regularly throw rocks at trees, producing impact sounds and resulting in the aggregations of rocks. The function of AST remains unknown but appears to be communication-related. We conducted field experiments to test whether impact sounds produced by throwing rocks at trees varied according to the tree's properties. Specifically, we compared impact sounds of AST and non-AST tree species. We measured three acoustic descriptors related to intrinsic timbre quality, and found that AST tree species produced impact sounds that were less damped, with spectral energy concentrated at lower frequencies compared to non-AST tree species. Buttress roots in particular produced timbres with low-frequency energy (low spectral centroid) and slower signal onset (longer attack time). In summary, chimpanzees use tree species capable of producing more resonant sounds for AST compared to other tree species available.

Indexed as

Pan troglodytesTool Use BehaviorAnimalsTreesanimal communicationbioacousticsbuttress rootsPan troglodytes veruspercussion soundstool use

Identifiers

PMID31847748
PMCPMC6936027

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.