About the Authors

Andrew J. Temple

andrew.temple@ncl.ac.uk

Affiliation School of Marine Science & Technology, Newcastle University, Newcastle-upon-Tyne, United Kingdom

Nick Tregenza

Affiliation Chelonia Limited, The Barkhouse, North Cliff, Mousehole, Cornwall, United Kingdom

Omar A. Amir

Affiliation Ministry of Livestock and Fisheries, Nyangumi House, Maruhubi Street, Zanzibar, Tanzania

Narriman Jiddawi

Affiliation Institute of Marine Sciences, Dar es Salaam University, Zanzibar, Tanzania

Per Berggren

Affiliation School of Marine Science & Technology, Newcastle University, Newcastle-upon-Tyne, United Kingdom

Competing Interests

Author NT has a commercial affiliation to the company (Chelonia Ltd.) which manufactured the acoustic equipment used in this research. However the authors do not believe that this affiliation had any undue influence on the interpretation of data and framing of the results. This affiliation does not alter their adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: AT PB. Performed the experiments: AT. Analyzed the data: AT PB NT. Contributed reagents/materials/analysis tools: NT NJ OA. Wrote the paper: AT PB NT NJ OA. In Country Facilitation: NJ OA.