Assessment of injury and mortality from rapid decompression on crucian carps

Knowledge of barotrauma injury mechanisms is required in the fish-friendly turbine design. Rapid decreases in pressure is one of the main reasons that cause injury and mortality to fish that pass through hydropower machines. A steel tank and related pressure regulation components were designed to st...

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Bibliographic Details
Published inIOP conference series. Earth and environmental science Vol. 163; no. 1; pp. 12075 - 12080
Main Authors Meng, L, Xue, N Z, Liao, C L, Zhao, L C, Wang, W P, Li, T Y
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 30.07.2018
Subjects
Barotrauma
Bladder
Decompression
Fish
Hydroelectric power
Injuries
Mortality
Organs
Steel structures
Swim bladder
Turbines
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Summary:Knowledge of barotrauma injury mechanisms is required in the fish-friendly turbine design. Rapid decreases in pressure is one of the main reasons that cause injury and mortality to fish that pass through hydropower machines. A steel tank and related pressure regulation components were designed to study the barotrauma injury thresholds of crucian carps. Decompression from 700 kPa to 6 kPa in 0.3 s was implemented in this system with dozens of yearling and subyearling crucian carps. The fish swim bladder and other organs were observed to find the main reason for injury after the rapid decompression. The tested fish were kept for at least 48 hours to study the physiological status in different observation periods. The direct and indirect decompression induced mortality after the test was observed and analyzed.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/163/1/012075