Research Document 1998/49
Distribution and abundance of Atlantic cod from the 1997 Division 3KL inshore acoustic survey
By J.P. Anderson, J. Brattey, E. Colbourne, D.S. Miller, D.R. Porter, C.R. Stevens, and J.P. Wheeler
Abstract
An acoustic survey was conducted during the fall of 1997 to estimate the biomass of Atlantic cod (Gadus morhua) in the coastal waters of NAFO Div. 3KL. A biomass estimate of 18300 t was calculated for the survey area, approximately 60% of which was detected in Trinity and Bonavista Bays. Highest cod densities occurred in depths greater than 20 m and less than 150 m. A wide range of age classes were present in biological samples collected during the survey; however, very few were older than age 8 years. This paper also describes acoustic and biological survey design, technology, analysis procedures and an examination of sources of error.
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