Utility of mixed effects models to inform the stock structure of whiting in the Northeast Atlantic Ocean

Stock structure of whiting (Merlangius merlangus) in the North East Atlantic is unclear. This study uses mixed effects models to analyse growth variability as a way to investigate stock identification. Growth trajectories for 634 individuals and length-at-age data for 78,686 individuals were analyse...

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Bibliographic Details
Published in:Fisheries Research
Main Authors: Barrios, Alexander, Ernande, Bruno, Mahe, Kelig, Trenkel, Verena, Rochet, Marie-joelle
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier Science Bv 2017
Subjects:
Growth
Whiting
North East Atlantic
Otolith
von Bertalanffy growth model
Mixed effects models
Northeast Atlantic
Online Access:https://archimer.ifremer.fr/doc/00373/48415/48810.pdf
https://doi.org/10.1016/j.fishres.2017.02.005
https://archimer.ifremer.fr/doc/00373/48415/
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Summary:Stock structure of whiting (Merlangius merlangus) in the North East Atlantic is unclear. This study uses mixed effects models to analyse growth variability as a way to investigate stock identification. Growth trajectories for 634 individuals and length-at-age data for 78,686 individuals were analysed for spatial coherence and temporal synchrony in the parameters of the von Bertalanffy growth model. Growth was found to differ among most ICES divisions, and temporal fluctuations were poorly synchronized between areas. This study illustrates how growth analyses can contribute to stock identification, in addition to other data.

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