Summary of the annual 2018 and 2019 sablefish (Anoplopoma fimbria) trap surveys, October 9 - November 19, 2018 and October 8 - November 25, 2019 / by Lisa C. Lacko, Schon M. Acheson and Brendan M. Connors.: Fs97-6/3396E-PDF

"This document describes sampling activities and summarizes results from the 2018 and 2019 British Columbia sablefish research and assessment surveys. These annual surveys utilized the same sampling strategies at stratified random (StRS) sites and traditional inlet sites. The random component was comprised of StRS sets at five depth-stratified areas and the traditional component employed standardized sets at four inlet localities on the mainland. In total, 58,415 sablefish were caught in 2018, of which 5,741 were used for biological samples and 10,965 were tagged and released. In 2019, a total of 78,836 sablefish were caught, of which 5,659 were used for biological samples and 12,042 were tagged and released. Catch per unit effort (CPUE) is an important result from this survey as it is used to infer population trends. In most recent years, survey data from StRS sets show increasing trends in both mean weight and numbers of fish per trap. CPUE at traditional inlet sites have varied in a predictable manner over time with peak CPUE occurring every 5-8 years and increasing to record levels in 2018 and 2019. At both StRS and traditional inlet sites, the average weight of sablefish in 2018 and 2019 reached record mean lows due to large numbers of small fish"--Abstract, page vi.

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