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Research Document - 2014/055

Results for cod from the sentinel longline surveys in the southern Gulf of St. Lawrence

By L. Savoie


Abundance indices for Atlantic cod, Gadus morhua, are derived from a sentinel longline program conducted in the southern Gulf of St. Lawrence from 1995 to the present. Based on information provided by fishers, fishing sites were established along the coast in traditional fishing areas. These sites were fished every year several times between July and October using standardized protocols. An annual biomass index for cod was derived based on catch rates which were standardized using a multiplicative model with factors for year, month, and site. The abundance index declined each year from 2005 to 2011, setting a new record low each year. No further declines in the index occurred in 2012 and 2013, though the values in these years remained near the record-low value of 2011.

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