NEWS RELEASE
Press Release 29 June 2003 from the Center for Whale Research, Friday Harbor, WA 98250 Contact Ken Balcomb, (360) 378-5835

On Saturday, 28 June 2003, we delivered the frozen carcass of a harbor porpoise (Phocoena phocoena, found in May floating off False Bay, Haro Strait west of San Juan Island) to the NOAA Fisheries National Marine Mammal Laboratory (NMML) at Sand Point, Seattle, WA.

porpoisedead

Because the porpoise was found subsequent to a sonar incident involving the USS "Shoup" in Haro Strait on 5 May, 2003 (during which scores of porpoises, a pod of killer whales, and a minke whale attempted to flee from the intense 230+dB 3kHz "pings" of the sonar) we considered the specimen might be relevant to that incident. Two other freshly dead porpoises were found immediately following the sonar incident on shores adjacent to the destroyer's path, and a total of at least ten porpoises died in the approximate time-frame of the incident (including the present specimen approximately two weeks later). Some of these porpoises may have coincidentally died of "natural" causes due to a seasonal influx of these animals to the area, but in all specimens the cause of death is yet to be determined, and the near simultaneity of their deaths is suspicious. At least six of the carcasses were collected and frozen for necropsy at the National Marine Mammal Laboratory (scheduled for July 21-25) to determine cause of death, and to determine if any might have suffered pressure trauma or hearing injury as a result of the sonar.

A useful diagnostic technique for examining for such pressure trauma and injuries, or other cause of death prior to necropsy, is computerized tomography (CT) which reveals internal structure and fine scale damage before dissection; but, CT is expensive and difficult to arrange due to human patient backlog for health diagnosis at imaging laboratories. Federal officials have been trying for six weeks to arrange CT imaging for some or all of the porpoise specimens prior to necropsy, because of concerns that dissection could destroy difficult to detect hemorrhagic evidence of pressure trauma, particularly around the ears and brain encased in bone. These officials say they have located a facility that might be able to scan these specimens, including larger specimens, beginning in August; but, that is after the scheduled necropsies. (Note: As of July 1, the porpoise specimens are now scheduled to be scanned in the third week of July, prior to the necropsies, according to Brent Norberg of NOAA FIsheries.)

Hearing of the need for urgency, a private diagnostic imaging facility and technician in Seattle generously donated time and equipment availability to the Center for Whale Research to CT scan the porpoise we had in our freezer prior to delivering the specimen to the National Marine Mammal Laboratory (NMML) on Saturday. The facility also CT scanned two frozen beaked whale earbones from a stranding of a Baird's beaked whale at La Push, WA on 22 January 2003, following a naval exercise near the W237 operating area in the Olympic National Marine Sanctuary.

porpoisescan beakedscan


Both the porpoise and the Baird's whale showed evidence on CT scan consistent with hemorrhagic trauma that could be due to a sonic pressure insult that would disorient and incapacitate the animals (or a human). The necropsies at NMML and subsequent histology and laboratory work on these specimens, including the other porpoises (and other whale specimens from other strandings), may very well reveal that naval sonar is killing marine mammals here in the Pacific Northwest, and that sonar-killing could be a factor in the resident killer whale population decline since 1996. That would not be all that surprising a finding, considering it is now well established that these powerful sonars are killing whales, dolphins and porpoises elsewhere in the world where naval exercises are conducted. There is no reason to believe that isn't happening near Seattle, as well.

We consider it important for the federal government (perhaps with Navy funding) to CT scan at least some of the remaining sonar incident porpoises prior to necropsy at the National Marine Mammal Laboratory; and, we encourage the US Congress to continue to refrain from exempting the military from the Marine Mammal Protection Act and other environmental laws meant to protect wildlife and the environment from abuse and injury.

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