期刊
FISHERIES RESEARCH
卷 121, 期 -, 页码 43-50出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fishres.2012.01.006
关键词
Barotrauma; Mortality; Juvenile salmonids; Hydropower
类别
资金
- U.S. Army Corps of Engineers (USACE), Portland District
- Symbiotics LLC.
- U.S. Department of Energy [DE-AC05-76RL01830]
On their seaward migration, juvenile salmonids commonly pass hydroelectric dams. Fish passing by the turbine blade may experience rapid decompression, the severity of which can be highly variable and may result in a number of barotraumas. The mechanisms of these injuries can be due to expansion of existing bubbles or gases coming out of solution: governed by Boyle's law and Henry's law, respectively. This paper combines re-analysis of published data with new experiments to gain a better understanding of the mechanisms of injury and mortality for fish experiencing rapid decompression associated with hydroturbine passage. From these data it appears that the majority of decompression related injuries are due to the expansion of existing bubbles in the fish, particularly the expansion and rupture of the swim bladder. This information is particularly useful for fisheries managers and turbine manufacturers, demonstrating that reducing the rate of swim bladder ruptures by reducing the frequency of occurrence and severity of rapid decompression during hydroturbine passage could reduce the rates of injury and mortality for hydroturbine passed juvenile salmonids. Published by Elsevier B.V.
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