About the Authors
- Ingrid Tulp
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* E-mail: ingrid.tulp@wur.nl
Affiliation Institute for Marine Resources and Ecosystem Studies, IJmuiden, The Netherlands
- Hans Schekkerman
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Affiliation Sovon Dutch Centre for Field Ornithology, Nijmegen, The Netherlands
- Joep de Leeuw
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Affiliation Institute of Freshwater Research, Swedish University of Agricultural Sciences, Drottningholm, Sweden
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: IT HS JdL. Performed the experiments: IT HS JdL. Analyzed the data: IT HS. Contributed reagents/materials/analysis tools: IT, HS. Wrote the paper: IT HS.