About the Authors

Giorgio Bernardi

gbernardi@uniroma3.it

Affiliations Science Department, Roma Tre University, Marconi, Rome, Italy, Stazione Zoologica Anton Dohrn, Villa Comunale, Naples, Italy

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GB. Analyzed the data: GB. Wrote the paper: GB.