Age Structure of Roughhead Grenadier (Macrourus berglax) on Flemish Cap, 1994

• Main Author: Casas, J. M.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Northwest Atlantic Fisheries Organization 1994
• Subjects: Northwest Atlantic
• Online Access: http://hdl.handle.net/10261/83975

5 páginas, 2 figuras, 3 tablas.-- Scientific Council Meeting The population dynamics and biology of Roughhead .grenacfier has proved difficult to study due to their distribution in depths greater than about 500 m, together with their relative unimportance as a commercial species in the Northwest Atlantic. Age-length keys and biomass swept area method estimates for Roughhead grenadier (Macrourus berglax) are presented in this paper. Samples were collected in a bottom trawl survey in NAFO Div. 3M in 1994. Ageing was done on otoliths by sex. Age structure of catches showed clear differences between the two sexes at age older than 8 years. The materials confirmed the relatively slow growth and multiaged structure of Al. berglax in the sample area. Peer reviewed