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Recovery of Barotrauma Injuries in Chinook Salmon, Oncorhynchus tshawytscha from Exposure to Pile Driving Sound

Figure 1

Photos of example injuries.

Ventral view of Chinook salmon, for Exposure 1 with recovery periods of 0, 2, 5, and 10 days post-exposure as well as an example of a control fish. Day 0 displays hematomas of the swim bladder, liver, and adipose tissue, as well as hemorrhaging of the intestine. Day 2 displays hemorrhaging of the spleen and hematomas of the intestine and adipose tissue. Day 5 displays a hematoma of the intestine. Day 10 displays a fish with no visible injuries, though mottling of the spleen (raspberry appearance) can be observed which was present in most fish that were exposed to sound pile driving sounds, and not usually present in control fish. The anterior ends of all fish are orientated to the left.

Figure 1