Age, adrenal steroids, and cognitive functioning in captive chimpanzees (Pan troglodytes)

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Takeshita et al. @KentState examine; age, adrenal steroids, and cognitive functioning in captive #chimpanzees (Pan troglodytes) Read the full article https://t.co/WWk19ipX2B #AnimalBehavior #Anthropology #EvolutionaryStudies
Takeshita et al. @KentState examine; age, adrenal steroids, and cognitive functioning in captive #chimpanzees (Pan troglodytes) Read the full article https://t.co/dclwtoUuLi #AnimalBehavior #Anthropology #EvolutionaryStudies
Hormones and chimpanzee cognition https://t.co/8dZsjhDhvt via @PeerJLife
Zoological Science

Main article text

 

Introduction

Material and Methods

Subjects and sample collection

Cognitive tests

Hormonal assays

Statistical analyses

Results

Discussion

Supplemental Information

Generalized Linear Models to test the relationship between steroid hormones, sex and age in chimpanzee cognitive performance

We used the full dataset (N = 107) for comparison with the reduced dataset (main file) that controls for age discrepancy between hormonal and cognitive data.

DOI: 10.7717/peerj.14323/supp-1

Interaction between the DHEAS/cortisol ratio and age as predictor of Primate Cognition Testing Battery PC1 (spatial relationships) in chimpanzees

Each data point represents one individual (N = 107). The regression lines represent the predicted relationship between PC1 and DHEAS levels in three age categories: young (dotted line), middle-aged (dashed line), and elderly (solid line). The shaded areas represent a 95% confidence interval on the fitted values.

DOI: 10.7717/peerj.14323/supp-2

Relationship between age and Primate Cognition Testing Battery PC2 (tool use and social communication) in chimpanzees

Each data point represents one individual (N = 107). The regression line represents the predicted relationship between PC2, and the shaded area represents a 95% confidence interval on the fitted values.

DOI: 10.7717/peerj.14323/supp-3

Correlation between (a) age and (b) cortisol and Primate Cognition Testing Battery PC3 (auditory and visual sensory perception) in chimpanzees

Each data point represents one individual (N = 107). The regression lines represent the predicted relationship between PC3 and (a) age or (b) cortisol levels. The shaded areas represent a 95% confidence interval on the fitted values.

DOI: 10.7717/peerj.14323/supp-4

PCTB and hormonal data for captive chimpanzees

DOI: 10.7717/peerj.14323/supp-5

Code for statistical analyses

DOI: 10.7717/peerj.14323/supp-6

Additional Information and Declarations

Competing Interests

The authors declare there are no competing interests.

Author Contributions

Rafaela S.C. Takeshita conceived and designed the experiments, performed the experiments, analyzed the data, prepared figures and/or tables, authored or reviewed drafts of the article, and approved the final draft.

Melissa K. Edler analyzed the data, authored or reviewed drafts of the article, and approved the final draft.

Richard S. Meindl analyzed the data, authored or reviewed drafts of the article, and approved the final draft.

Chet C. Sherwood conceived and designed the experiments, authored or reviewed drafts of the article, and approved the final draft.

William D. Hopkins conceived and designed the experiments, performed the experiments, authored or reviewed drafts of the article, and approved the final draft.

Mary Ann Raghanti conceived and designed the experiments, performed the experiments, analyzed the data, authored or reviewed drafts of the article, and approved the final draft.

Animal Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

The Institutional Animal Care and Use Committee of Emory University approved the study (Protocol #2000673 entitled “Neural Imaging pf Primates”; Protocol #2002189 entitled “Hemispheric specialization an and Communicative and Social Competency in Chimpanzees”).

Data Availability

The following information was supplied regarding data availability:

The raw data and R code used for the statistical analyses is available in the Supplemental Files.

Funding

This study was funded by the National Institute of Health (No. R01AG067419), by the National Science Foundation (No. 2123574), and by the Wenner-Gren Foundation (No. 10088). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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