Research ArticleECOLOGY

Time-space–displaced responses in the orangutan vocal system

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Science Advances  14 Nov 2018:
Vol. 4, no. 11, eaau3401
DOI: 10.1126/sciadv.aau3401
  • Fig. 1 Vocal delay by Sumatran orangutan females.

    Survival plot showing the delay of subjects’ vocal onset after presentation of predator models at time zero (A) and correlational plots between alarm probability and (B) subject height up the understory and (C) infant age. Shaded areas represent 95% confidence intervals. Yellow band denotes exposure time to predator model.

  • Fig. 2 Graphic representation of subjects’ ascent up the canopy during the 60 min after the first sight of the predator model.

    Yellow band denotes exposure time to the predator model.

  • Fig. 3 Bar plot showing the vocal response delay and duration after presentation of predator models at time zero.

    Yellow band denotes exposure time to the predator model.

  • Fig. 4 Density plots of the incidence of stress behaviors (i.e., urinating and defecating) during the 15 min after the first sight of the predator model.

    (A) Count (density*n) of stress behaviors. (B) Scaled density estimate (maximum of 1) of stress behaviors, enabling a better visual comparison between the patterns of physiological stress between the two types of response by the subjects.

Supplementary Materials

  • Supplementary material for this article is available at http://advances.sciencemag.org/cgi/content/full/4/11/eaau3401/DC1

    Table S1. Distribution of the different predator model experiments per subject, with name of respective infant in brackets.

    Fig. S1. Distribution of experimental height for each subject per experiment that produced response or no response.

    Fig. S2. Vocal displacement per predator model for experiments that elicited vocal response.

  • Supplementary Materials

    This PDF file includes:

    • Table S1. Distribution of the different predator model experiments per subject, with name of respective infant in brackets.
    • Fig. S1. Distribution of experimental height for each subject per experiment that produced response or no response.
    • Fig. S2. Vocal displacement per predator model for experiments that elicited vocal response.

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