Tusk (Brosme brosme) in the Northeast Atlantic ...

• Main Author: ICES
• Format: Report
• Language: unknown
• Published: ICES Advice: Recurrent Advice 2022
• Subjects: Oceanic Northeast Atlantic ICES Ecoregion; Fisheries and aquaculture; Arctic; Canada; Mid-Atlantic Ridge; North Atlantic; Northeast Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.18674417.v1; https://ices-library.figshare.com/articles/report/Tusk_Brosme_brosme_in_the_Northeast_Atlantic/18674417/1

Based on the genetic information that has been analyzed in 2007, ICES presents advice for the following stock units of tusk: Subareas I and II (Arctic); Division Va and Subarea XIV; Division XII excluding XIIb (Mid-Atlantic Ridge); Division VIb (Rockall); Other areas (IIIa, IV, Vb, VIa, VII, VIII, IX, and XIIb). This latter grouping is a combination of isolated fishing grounds and these areas are grouped due to their mutual lack of data. The new perception of the stock structure is based on considerations of new genetic information in 2007 (ICES, 2007). Studies using recently developed microsatellite primers detected highly significant genetic differentiation in tusk within its North Atlantic range. In particular, tusk around Rockall, the Mid-Atlantic Ridge, and off Canada, most likely represent different biological populations that clearly warrant separate management considerations. For the remainder of the North Atlantic this study uncovered limited genetic differentiation and no firm conclusion can be ...