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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Sofia P Ramalho conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Lidia Lins conceived and designed the experiments, performed the experiments, reviewed drafts of the paper.

Nikolaos Lampadariou conceived and designed the experiments, reviewed drafts of the paper.

Ann Vanreusel conceived and designed the experiments, performed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Marina R Cunha conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper.

Field Study Permissions

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

The field work was carried out during two oceanographic cruises in the Portuguese EEZ, for which the principal scientist obtained the necessary permits from the Portuguese authorities (Ministério da Defesa).

Data Deposition

The following information was supplied regarding data availability:

The research in this article did not generate any raw data.

Funding

This work was partially funded by VLIZ and CESAM (UID/AMB/50017/2013). SPR is funded through a MARES Grant (MARES_12_10). MARES is a Joint Doctorate programme selected under Erasmus Mundus coordinated by Ghent University (FPA 2011-0016). Check www.mares-eu.org for extra information. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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