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Supplemental Information

Appendix A. Summary of morphological observations for the Echinometra species complex from 2 sites from Western Visayas, Philippines (Nabas, Aklan and Taklong Island, Guimaras)

DOI: 10.7287/peerj.preprints.27986v2/supp-1

Appendix B. Satellite view of the two survey sites showing locations of the transects

Top: Nabas, Aklan; bottom: Taklong Island, Guimaras.

DOI: 10.7287/peerj.preprints.27986v2/supp-2

Appendix C. Raw data from the parallel transect (at 0 m and 0.9 m) in Nabas, Aklan. Rep. means replicate

DOI: 10.7287/peerj.preprints.27986v2/supp-3

Appendix D. Raw data for the parallel transects (at 0 m and 0.9 m) in Taklong Island, Guimaras. Rep. means replicate

DOI: 10.7287/peerj.preprints.27986v2/supp-4

Appendix E. Raw data for the perpendicular transects in Nabas, Aklan

DOI: 10.7287/peerj.preprints.27986v2/supp-5

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Joseph Ricky Tamayo conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, prepared figures and/or tables, authored or reviewed drafts of the paper.

Maria Celia D Malay conceived and designed the experiments, contributed reagents/materials/analysis tools, authored or reviewed drafts of the paper, approved the final draft, applied for permits.

Field Study Permissions

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

Specimens were collected under a Wildlife Gratuitous Permit issued to Maria Celia D. Malay by the Republic of the Philippines Department fo Environment and Natural Resouces.

Data Deposition

The following information was supplied regarding data availability:

A summary of observations of each sea urchin specimen are provided in Appendix A, while Appendices C-E contain the raw data from the belt transect surveys.


This work was partly supported by a Balik-PhD grant from the University of the Philippines awarded to MCD Malay. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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