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Title: A Preliminary Assessment of Barotrauma Injuries and Acclimation Studies for Three Fish Species

Fish that pass hydro structures either through turbine passage, deep spill, or other deep pathways can experience rapid decreases in pressure that can result in barotrauma. In addition to morphology and physiology of the fish’s swim bladder, the severity of barotrauma is directly related to the volume of undissolved gas in fish prior to rapid decompression and the lowest pressure the fish experience as they pass hydro structures (termed the “nadir”). The volume of undissolved gas in fish is influenced by the depth of acclimation (the pressure at which the fish is neutrally buoyant); therefore, determining the depth where fish are neutrally buoyant is a critical precursor to determining the relationship between pressure changes and injury or mortality.
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  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
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Resource Type:
Technical Report
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
Country of Publication:
United States
60 APPLIED LIFE SCIENCES Assessment; Barotrauma; injuries; Acclimation; Studies; Three; Fis: Species