increased harbor porpoise mortality in the pacific northwest, usa: understanding when higher levels may be 2006, a marked increase in harbor porpoise phocoena phocoena strandings were reported in the pacific northwest of the usa, resulting in the declaration of an unusual mortality event (ume) for washington and oregon to facilitate investigation into potential causes. the ume was in place during all of 2006 and 2007, and a total of 114 porpoises stranded during this period. responders examined 95 porpoises; of these, detailed necropsies were conducted on 75 animals. here we review the findings re ...201526203880
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