About the Authors

Tim van der Stap

Affiliations IMARES Wageningen UR–Institute for Marine Resource & Ecosystem Studies, P.O. Box 57, 1780 AB, Den Helder, The Netherlands, Chair group Aquatic Ecology and Water Quality Management, Wageningen UR, Wageningen, The Netherlands

Joop W. P. Coolen

joop.coolen@wur.nl

Affiliations IMARES Wageningen UR–Institute for Marine Resource & Ecosystem Studies, P.O. Box 57, 1780 AB, Den Helder, The Netherlands, Chair group Aquatic Ecology and Water Quality Management, Wageningen UR, Wageningen, The Netherlands

Han J. Lindeboom

Affiliations IMARES Wageningen UR–Institute for Marine Resource & Ecosystem Studies, P.O. Box 57, 1780 AB, Den Helder, The Netherlands, Chair group Aquatic Ecology and Water Quality Management, Wageningen UR, Wageningen, The Netherlands

Competing Interests

I have read the journal's policy and the authors of this manuscript have the following competing interests: Although the work reported in this publication was supported by video footage from GDF-SUEZ and obtained financial support from the Nederlandse Aardolie Maatschappij BV (NAM), Wintershall Holding GmbH and EBN B.V., the authors declare that the research was conducted and reported completely independent from these companies. This does not alter our adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: TVDS JWPC HJL. Analyzed the data: TVDS JWPC. Contributed reagents/materials/analysis tools: TVDS JWPC HJL. Wrote the paper: TVDS JWPC HJL. Conducted the observations: TVDS JWPC.