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It is difficult to define distinct populations of scallops as they may either disperse over large distances in their planctonic phase or, in some cases, remain within a localized hydrological area over generations (Seafish, 2013). There are some indications that there is a larger Irish Sea and off Northern Ireland population (Beaumont, 1982; Andrews et al, 2011). Connectivity with West of Scotland populations is unknown, so a single profile exists for fisheries operating in Irish Sea and W of Scotland. A localized assessment has been conducted for the Isle of Man.