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Notes: Turbine‐Passage Mortality of Juvenile American Shad at a Low‐Head Hydroelectric Dam
Author(s) -
Mathur Dilip,
Heisey Paul G.,
Robinson David A.
Publication year - 1994
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1994)123<0108:ntpmoj>2.3.co;2
Subject(s) - juvenile , hydroelectricity , alosa , fishery , turbine , environmental science , geography , hydrology (agriculture) , fish <actinopterygii> , biology , ecology , fish migration , engineering , mechanical engineering , geotechnical engineering
The immediate (1‐h) turbine‐related mortality of juvenile American shad Alosa sapidissima at the Hadley Falls Hydroelectric Station on the Connecticut River, Holyoke, Massachusetts, was estimated to be 0% ± 14.5% (95% confidence interval) at the 35% wicket gate opening and 2.7% ± 16.2% at the 100% opening. We used the HI‐Z TurbˈN tag‐recapture technique, which helped minimize control mortality and maximize recapture rates. Earlier literature estimates of turbine‐related mortality (up to 82%) of juvenile alosids in passage through Kaplan turbines, in our view, were substantially overstated due to either low recapture rate, high control mortality, or both.