Identifying blue whiting (micromesistius poutassou) stock structure in the northeast atlantic by otolith shape analysis
Mahe, Kélig Oudard, Clémence Mille, Tiphaine Keating, James Gonçalves, Patricia Clausen, Lotte Worsoe Petursdottir, Gróa Rasmussen, Helle Meland, Elna Mullins, Eugene
Mahe, Kélig
Oudard, Clémence
Mille, Tiphaine
Keating, James
Gonçalves, Patricia
Clausen, Lotte Worsoe
Petursdottir, Gróa
Rasmussen, Helle
Meland, Elna
Mullins, Eugene
Publication Date
2016-09-01
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Article
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Mahe, Kélig; Oudard, Clémence; Mille, Tiphaine; Keating, James; Gonçalves, Patricia; Clausen, Lotte Worsoe; Petursdottir, Gróa; Rasmussen, Helle; Meland, Elna; Mullins, Eugene; Pinnegar, John K. Hoines, Åge; Trenkel, Verena M. (2016). Identifying blue whiting (micromesistius poutassou) stock structure in the northeast atlantic by otolith shape analysis. Canadian Journal of Fisheries and Aquatic Sciences 73 (9), 1363-1371
Abstract
Information on stock identification and spatial stock structure provide a basis for understanding fish population dynamics and improving fisheries management. In this study, otolith shape analysis was used to study the stock structure of blue whiting (Micromesistius poutassou) in the northeast Atlantic using 1693 samples from mature fish collected between 37 degrees N and 75 degrees N and 20 degrees W and 25 degrees E. The results indicated two stocks located north and south of ICES Divisions VIa and VIb (54 degrees 5N to 60 degrees 5N, 4 degrees W to 11 degrees W). The central area corresponds to the spawning area west of Scotland. Sampling year effects and misclassification in the linear discriminant analysis suggested exchanges between the northern and southern stocks. The results corroborate previous studies indicating a structuring of the blue whiting stock into two stocks, with some degree of mixing in the central overlap area.
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Canadian Science Publishing
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Attribution-NonCommercial-NoDerivs 3.0 Ireland