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Supplemental Information

Timetable of monthly visits

Timetable of 454 monthly visits (dark grey) to 10 groups of mantled howler monkeys in Los Tuxtlas, Mexico, between 2000 and 2011.

DOI: 10.7287/peerj.preprints.800v1/supp-1

Additional Information

Competing Interests

The authors declare they have no competing interests.

Author Contributions

Jurgi Cristóbal Azkarate conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Jacob Charles Dunn conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Cristina Domingo Balcells conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, reviewed drafts of the paper.

Joaquim Veà Baró conceived and designed the experiments, performed the experiments, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper.

Animal Ethics

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

This study is based on observational data and there was no direct interaction with the study subjects. All research adhered to the American Society of Primatologists Principles for the Ethical Treatment of Non‐Human Primates and to the legal requirements of Mexico. We also obtained approval from the ethics committees of the University of Barcelona and Universidad Veracruza.

Field Study Permissions

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

We were granted access to the study site by local communities, landowners, and the Los Tuxtlas Biosphere Reserve, part of the National Commission of Natural Protected Areas of Mexico (CONANP).

Funding

The first census in 2000 was supported by the Zientzi Politikarako Zuzendaritza of the Basque Government (JCA). Subsequent studies that provided data for our analyses were funded by grants from the Spanish Ministry of Education and Science (PB98-1270, SEJ2005-01562), Fundación BBVA, The Isaac Newton Trust (JD), the Mexican Ministry of Foreign Affairs (CDB) and Barcelona Zoo (CDB). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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