The Relationship between Vessel Traffic and Noise Levels Received by Killer Whales (Orcinus orca) Houghton, Juliana ; Holt, Marla M. ; Giles, Deborah A. ; Hanson, M. Bradley ; Emmons, Candice K. ; Hogan, Jeffrey T. ; Branch, Trevor A. ; VanBlaricom, Glenn R. Abstract Publication: PLoS ONE Pub Date: December 2015 DOI: 10.1371/journal.pone.0140119 Bibcode: 2015PLoSO..1040119H