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Mortality of Juvenile Clupeids during Passage through a Tidal, Low‐Head Hydroelectric Turbine at Annapolis Royal, Nova Scotia
Author(s) -
Stokesbury Kevin D. E.,
Dadswell Michael J.
Publication year - 1991
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1991)011<0149:mojcdp>2.3.co;2
Subject(s) - nova scotia , juvenile , hydroelectricity , tidal power , turbine , environmental science , oceanography , geology , marine engineering , engineering , biology , ecology , mechanical engineering
Migrant juvenile clupeids passing through the tidal, low‐head hydroelectric turbine at Annapolis River, Nova Scotia, were monitored during the fall of 1985 and 1986. Although there were two fishways adjacent to both sides of the turbine intake, 98% of the clupeids passed through the tidal‐power turbine. Total mortality of clupeids from turbine passage was estimated to be 46.3% for both years combined. Injuries observed were attributed to pressure effects (64.5%), mechanical strike (33.9%), and hydraulic shearing (1.7%).