Mortality of Juvenile Clupeids during Passage through a Tidal, Low-Head Hydroelectric Turbine at Annapolis Royal, Nova Scotia
Annapolis River, clupeids, hydraulic shearing, hydroelectric, injuries, instream flow, intake, juvenile, mortality, pressure effects, turbine passage, turbines
Journal or Book Title
North American Journal of Fisheries Management
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%).