•
Commercial importance.
18. Assessment of the impacts on the above has been separately applied to the construction, operational and decommissioning phases.
19.
Cumulative impacts relevant to fish and shellfish ecology arising from other marine developments are discussed in section 11.7.
11.4.3.1 Assessment Limitations 20.
The impact assessment presented within this chapter of the PEIR is subject to certain limitations. Principally, these relate to knowledge gaps regarding the sensitivity of some species and/or species groups to particular impacts (e.g. impacts of noise on shellfish). Therefore in some instances it has been necessary to use similar species, or species groups. Further uncertainties relate to the distribution of some species and the degree to which they access the proposed East Anglia THREE project during key life history phases such as during spawning or migration.
11.4.3.2 Significance Criteria 21.
The significance of potential impacts has been defined by considering receptor sensitivity in combination with the magnitude of a given impact. Due to a lack of suitable data to quantitatively assess impacts for the majority of the species under consideration, the assessment is to some extent qualitative and reliant on professional experience and judgement.
11.4.3.3 Sensitivity 22.
Receptor sensitivity has been assigned on the basis of species specific adaptability, tolerance, and recoverability, when exposed to a potential impact. The following parameters have also been taken into account:
• • 23.
Timing of the impact: whether impacts overlap with critical life-stages or seasons (i.e. spawning, migration); and
Probability of the receptor-effect interaction occurring (e.g. vulnerability)
Throughout the assessment, receptor sensitivities have been informed by thorough review of the available peer-reviewed scientific literature, and assessments available on the Marine Life Information Network (MarLIN) database. Definitions of receptor sensitivity are provided in Table 11.3.
24. With regard to noise related impacts, the criteria adopted are based on internationally accepted peer-reviewed evidence and criteria proposed by consensus of expert committees. Fish criteria were adopted from Popper et al. (2006) and Carlson et al. (2007) in terms of injury, while behavioural criteria were devised
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 11 Fish and Shellfish Page 21
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