The qualification of the magnitude of this impact will be guided by both the results of noise assessments and the findings of Chapter 9 Underwater noise, vibration and EMF.
Assessment of sensitivities of fish and shellfish species to underwater noise will be informed by available literature including the assessments available on MarLIN and peer‐review publications.
The impact on key receptors will be considered at the local and population level.
3.3.2.4 Electromagnetic fields (EMF): 35.
Some species of fish, such as elasmobranchs and cod, which utilise electromagnetic fields for activities such as hunting prey and navigation are potentially vulnerable to anthropogenic sources of EMF. To date, research on the potential effects of EMF on fish and shellfish has been inconclusive (Gill et al, 2009). As part of literature review to identify potential EMF impacts for East Anglia ONE, CMACS (2012) concluded that any impacts would be limited to within a few metres of the cables and therefore would not be significant.
3.3.2.4.1 Proposed method for assessment
The level of magnitude will be informed by the design specifications of the East Anglia THREE and East Anglia FOUR sub‐sea cables.
Assessment of sensitivities of fish and shellfish species to EMF will be informed by available literature including the assessments available on MarLIN and peer‐ review publications.
The impact on key receptors will be considered at the local and population level.
3.3.2.5 Changes in Fishing Activity 36.
During the operational phase of East Anglia ONE, fishing activities (including trawling and potting) may be excluded from part of or the entire offshore windfarm site. This has the potential to enhance fish and shellfish populations by providing refuge from fishing activities for certain species targeted by commercial fisheries in the southern North Sea. Alternatively, the effect may result in increased fishing pressure outside the windfarm site.
3.3.2.5.1 Proposed method for assessment
Evidence plan Fish and Shellfish Method Statement
For the purpose of this assessment it is assumed that all fishing activity will be excluded from the area of East Anglia THREE and East Anglia FOUR for the
East Anglia THREE and East Anglia FOUR Offshore Windfarms
September 2013 Page 33
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