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Supplemental Information

Species occurrence data

S. chinensis

DOI: 10.7287/peerj.preprints.2101v2/supp-1

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Mei Chen conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Yuqin Song conceived and designed the experiments, reviewed drafts of the paper.

Dagong Qin performed the experiments, reviewed drafts of the paper.

Animal Ethics

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

Our field work was permitted and supported by the Sanniang Bay Management Committee, which is part of the local government. We conducted boat-based survey approach. When we surveying, trained observers looked for the dolphins with the naked eye. We maintained at least 50-meter distance from the animals unless they swam close to us initiatively, for both observation and following them. There is no touching, feeding, and other improper behaviors with the dolphins. Therefore, approval from animal ethics committee is not required under Chinese Law.

Data Deposition

The following information was supplied regarding data availability:

The raw data has been supplied as a supplementary file.


The authors received no funding for this work.

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