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Threshold for Onset of Injury in Chinook Salmon from Exposure to Impulsive Pile Driving Sounds

Figure 6

Frequency of barotrauma injury occurrence per fish.

The number of test fish (z-axis) with number of unweighted-barotrauma injuries (x-axis) by each Treatment (y-axis) which is in order of SELcum values (see Table 1). For example, in the most severe exposure (Treatment 1 = T1, see Table 1 for each Treatment’s metrics), 1 fish had 13 injuries, and 10 fish had 8 injuries. Similarly, for the least severe exposure (T11), 6 fish had 1 injury, and 24 fish had 0 injuries.

Figure 6