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Fisheries and Oceans Canada conducts an annual fishery-independent acoustic survey of Herring in the southern Gulf of St. Lawrence. The survey, active since 1991, uses a random stratified design with parallel transects and trawl sampling to generate a standardized abundance index and catch-at-age data from 1994 onward. It provides age-disaggregated acoustic abundance indices for ages 2 to 10 for both spring and fall spawners.
Data use is encouraged to be coordinated with the data custodian to ensure scientific integrity.