R scripts and data used to analyse social play in adult howler monkeys in the study
Asensio, N., Zandona, E., Dunn, J.C., Cristobal-Azkarate, J. (2022). Socioecological correlates of social play in adult mantled howler monkeys, Animal Behaviour https://doi.org/10.1016/j.anbehav.2022.01.017
Image 1. Two howler monkey adult males and one adult female engaging in social play (N.Asensio)
Image 2. Two howler monkey adult females playing hanging from tails. Note open-mouthed play face (N.Asensio)
Image 3. An adult female howler monkey playing with a juvenile. Note the the infant ventrally located at the female body (A. Gonzalez-Zamora)
Image 4. A juvenile and an infant howler monkeys engaged in playing (N.Asensio)
Image 5. An adult male and two adult female howler monkeys playing. Note pulling, grabbin and biting in a non aggresive context.
Image 6. Tree adult female howler monkeys above the observer (N. Asensio)
Image 7. A juvenile and an infant howler monkey playing in Playa Escondida (N. Asensio)
Image 8. A juvenile, and infant and an adult female of howler monkey in social play (N. Asensio)
Image 9. Two juvenile spider monkeys (Ateles geoffroyi) chasing each other at play (N. Asensio).
Image 10. An "adult" female and an "adult" male of Homo sapiens playing, yes, they are playing (N. Asensio).
news mentions:
https://phys.org/news/2022-03-monkeys-group-tension.amp https://uk.style.yahoo.com/adult-howler-monkeys-play-keep-230000557.html https://www.sciencedaily.com/releases/2022/03/220317094737.htm https://www.independent.co.uk/news/science/howler-monkeys-play-conflict-tension-b2037801.html https://amubiochemicalsociety.org/monkeys-play-to-reduce-group-tension-study-finds/ https://scienceblog.com/528836/monkeys-play-to-reduce-group-tension-study/ https://www.newsbreak.com/news/2544325514441/howler-monkeys-play-to-avoid-conflict-and-reduce-group-tension-study-finds https://plu.mx/plum/a/news?doi=10.1016/j.anbehav.2022.01.017&theme=plum-sciencedirect-theme&hideUsage=true https://www.sciencefocus.com/news/monkeys-use-playtime-to-help-resolve-conflict/
Figure 4. (a) Coefficients (dots) and 95% confidence intervals (horizontal lines) of the GLMM explaining adulteadult play. (b) Mean fitted responses for the time engaged in adult-adult social play (expressed as percentage of observation time) by howler monkeys according to sex, the number of adults in the group, the immature to adult ratio and the percentage of time spent feeding on fruit. Group ID was a random factor: AGA: Agaltepec Island; LIZ: Arroyo Liza; PLA: Playa Escondida; CH: Charlie; CP: Cerco de piedra; SE: San Emilio; SN: Sendero Natural.