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Atlantic
salmon out-migration monitoring
ABI
was contracted by Abitibi-Price Consolidated Inc. (ACI)
to conduct a multi-year study to determine fish guidance
efficiencies for their fish bypass system. The challenge
of this study was to monitor the movements of Atlantic salmon
smolts and post-spawning adults during their movement within
a power canal fitted with a louver system to divert these
fish from turbine intakes in real time. Using these observations,
ABI calculated fish guidance efficiencies (FGEs) the louver
array in its current configuration. Based on the FGE's determined
by ABI, modifications to the louver system were made to
increase its bypass efficiency.
Determining
FGEs for the louver system required ABI to develop a suitable
monitoring program for downstream migrating Atlantic salmon
smolts and post-spawning adults. Both smolts and adults
were fitted with radio transmitters and their movement monitored
by multiple antennas placed within the power canal and along
the louver system. The telemetry system used in the ACI
project incorporated both single antenna receivers located
at fixed stations and a multiple antenna DSP system installed
at the louver array. The use of DSP in the ACI project allowed
ABI to monitor the movements of Atlantic salmon at sequential
locations along the louver simultaneously. Combined with
fixed monitoring stations before and after the louver array,
the DSP system was able to track the movements of Atlantic
salmon at all times during the study.
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