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based avoidance rate. The proposed project, CRMwere run using a range of avoidance rates including 98%, 99% and 99.5%. However, for the purpose of the assessment of collision risk within the PEI only a 98% avoidance rate has been presented for Extended Band CRM Option 3, with all other Basic Band CRM Options with a range of avoidance rates being presented in Appendices A and B of this report.
5.2 Summary of Seabird Collision Mortality Rates
25. To estimate the mortality rates for the species that have been modelled through the CRM the mean peaks abundance and associated bird densities have been calculated per month based on the 2011 to 2013 aerial survey data. These estimates have been used to calculate the predicted annual mortality rates for a range of avoidance rates (98%, 99% and 99.5%) and are presented in Tables 5.1 and 5.2 for key the seabirds and migrant seabirds, respectively. The mortality rates for each species for each month are presented in Appendix A for the key seabirds, whilst grouped seasonal mortality rates are reported in the PEI Chapter 13 Offshore Ornithology (Chapter 13, section 13.7.2.3).
Table 5.1. Seabird Annual Mortality Rates from Collision Risk Modelling for the East Anglia THREE site