EMF and the Flounder: Electromagnetic fields and their consequences for a vital fishery species

Introduction

Electromagnetic fields (EMFs) are a combination of electric and magnetic fields of force, produced either naturally or through human activities. With the large-scale deployment of offshore renewable energy projects, both current and planned, the interest in understanding EMFs in the marine environment has grown.

Offshore energy infrastructure includes inter-array and export cables, which are associated with the presence of EMFs in marine ecosystems. While power cables are typically buried in the seabed or protected with concrete mattresses, EMFs can still be detected in the surrounding environment. Some cables also remain exposed in the water column, particularly in floating wind farms, or cannot be fully buried due to local seabed conditions.

To improve knowledge on this topic and support fact-based discussions among all sea users, 50Hertz, Europacable, EirGrid, TenneT and RGI have joined forces to conduct and commission studies on EMFs in relation to commercially important flatfish species, specifically European flounder (Platichthys flesus).