Assessment of injury and mortality from rapid decompression on crucian carps

Asian Working Group- IAHR's Symposium on Hydraulic Machinery and Systems

Meng, L.^1 ; Xue, N.Z.^1 ; Liao, C.L.^1 ; Zhao, L.C.^1 ; Wang, W.P.^1 ; Li, T.Y.^1

China Institute of Water Resources and Hydropower Research, A1 Fuxing Road, Beijing

100038, China^1

关键词: Barotrauma;    Crucian carp;    Injury mechanisms;    Injury threshold;    Observation Period;    Physiological status;    Swim bladders;    Turbine designs;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/163/1/012075/pdf
DOI  :  10.1088/1755-1315/163/1/012075

来源: IOP

【 摘 要 】

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.