* Mayor says 82 bodies recovered
* Most victims Somalis and Eritreans
* Up to 500 migrants packed onto small boat (Updates death total, adds quotes, detail)
By Massimiliano Di Giorgio
ROME, Oct 3 (Reuters) - At least 82 people died and scores were missing after a boat carrying migrants from Africa sank off the Sicilian island of Lampedusa on Thursday, officials and rescuers said....