Injury and mortality of two Mekong River species exposed to turbulent shear forces [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 610.28 Auxiliary techniques and procedures; apparatus, equipment, materials

Thông tin xuất bản: Richland, Wash. : Oak Ridge, Tenn. : Pacific Northwest National Laboratory (U.S.) ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2018

Mô tả vật lý: Size: p. 1945-1953 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 260182

 Global hydropower development is one solution proposed to address the increase in energy needs. However, hydropower-related impacts on riverine ecological systems are not well understood. The Mekong River Basin (MRB) is one of the world?s largest waterways and is presently experiencing significant hydropower expansion. It is also one of the most biodiverse rivers
  serving as home to many species that are blocked or hindered by the development of dams. One source of injury and mortality for downstream moving fishes is passage through the turbine environment where fishes may be exposed to several physical stressors (e.g. shear forces, rapid decompression, blade strike and turbulence). The current study sought to understand the susceptibility of blue gourami (<
 em>
 Trichopodus trichopterus<
 /em>
 ) and iridescent shark (<
 em>
 Pangasianodon hypophthalmus<
 /em>
 ) to shear forces. Fishes were exposed to an underwater jet with velocities up to 21.3 m s<
 sup>
 ?1<
 /sup>
  (equating to strain rates of up to 1185 s<
 sup>
 ?1<
 /sup>
 ) and were assessed for behavioural effects, injuries and mortality. Overall, it was determined that both species were susceptible to the shear forces applied in this study and the effects were more pronounced at higher strain rates. Gouramis were more susceptible than sharks. Furthermore to minimise impacts on these species, shear forces within turbines should not exceed critical limits.
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