Multidisciplinary investigation of stranded Harbor Porpoises (Phocoena phocoena) in Washington State with an assessment of acoustic trauma as a contributory factor (2 May - 1 June 2003)

TitleMultidisciplinary investigation of stranded Harbor Porpoises (Phocoena phocoena) in Washington State with an assessment of acoustic trauma as a contributory factor (2 May - 1 June 2003)
Publication TypeReport
Year of Publication2004
AuthorsNorman SA, Raverty S, Pabst AD, Ketten DR, Fleetwood M, Gaydos JK, Norberg B, Barre L, Cox T, Hanson B, Jeffries S
Document NumberNMFS-NWR-34
Pagination120
Date Published10/2004
InstitutionU.S. Department of Commerce, NOAA, NMFS
CitySeattle
TypeTechnical Memorandum
Call NumberDRK6843
Keywordsharbor porpoise, haro strait, mid-range, sonar, strait of juan de fuca, stranding, uss shoup
Abstract

Observations of altered behavior of marine mammals in the area of mid-range sonar use by the naval vessel USS SHOUP in the eastern Strait of Juan de Fuca and Haro Strait on 5 May 2003, prompted the National Marine Fisheries Service (NMFS) to conduct an in-depth investigation on the causes of harbor porpoise strandings. Fifteen stranded harbor porpoises were reported during the period of 2 May 2003 to 2 June 2003, an abnormally high number when compared to the average stranding rate of 6 per year recorded over the previous decade. Eleven of the stranded harbor porpoises were collected for this investigation.