adopted a reproductive strategy of high egg production to compensate for losses during egg extrusion and the extended incubation period (McQuaid et al. 2009).


82.


In comparison to most finfish species, shellfish have more limited mobility and may not be capable of escaping construction activities causing physical disturbance to the sea bed. In particular, the egg masses of ovigerous (egg-bearing) species would be potentially vulnerable to physical damage. However, due to the temporary and short term nature of the effects, the sensitivity of these receptors is considered to be medium. As previously stated, the magnitude of the effect is negligible to low; therefore the resulting in an impact of minor adverse significance.


83.


Table 11.19 below summarises the impacts of physical disturbance and temporary loss of sea bed habitat.


Table 11.19 Impact of physical disturbance and temporary loss of sea bed habitat. Receptor Group


Herring and Sandeel Shellfish


Receptor sensitivity Magnitude of Effect Medium


Medium Low Impact Significance


Low to Negligible Negligible to minor adverse


Minor


11.6.1.2 Impact 2: Increased Suspended Sediment Concentrations and Sediment Re- deposition


84.


The results of modelling suspended sediment concentrations and sediment re- deposition across the East Anglia THREE site are described fully in Chapter 7 Marine Geology, Oceanography and Physical Processes.


85.


The magnitude of the effect of increased suspended sediment concentrations and sediment re-deposition for the following construction activities are discussed separately for;


• • •


86.


• • •


GBS Foundation Preparation and Installation; Drilling Operations; and


Inter-Array and Export Cable Installation.


Receptor sensitivity is then considered as follows; Physiological Effects on Fish Species; Physiological Effects on Shellfish Species; Physiological Effects on Sandeels; and


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 11 Fish and Shellfish Page 47


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