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(1) Performing system calibration using a 30-cm aluminum sphere.
(2) Deploying the system to record the backscattering from the following:
     a) Hake aggregation.
     b) Humboldt squid aggregation.
     c) Hake and Humboldt squid mixed aggregation.
(3) Determining the size of fish aggregations that have distinct swim bladder sizes by using spectral analysis at or near fish resonance frequency.
The results from this proposed work will address the issues raised by hake assessment STock Assessment Review (STAR) panel and Pacific Fishery Management Councils (PFMC) Scientific and Statistical Committee (SSC) as regarded critical to improve the quality of future hake stock assessments. Although this proposed work targets at Pacific hake, it is applicable to other fish species such as herring and myctophids.The participants of the project include Dezhang Chu (PI), Larry Hufnagle, and John Pohl. It is on-going project.
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