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Additional Information

Competing Interests

The authors declare they have no competing interests.

Author Contributions

Andrea Cossu 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.

Mario De Luca 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.

Yuri Donno conceived and designed the experiments.

Field Study Permissions

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

National Park of La Maddalena, Sardinia Italy, gave its approval and field permits.

Funding

Funding was provided by the project “Parc Marine International des Bouches de Bonifacio (P.M.I.B.B.)” Asse P.O. Marittimo 2007-2013. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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