Can we model otolith growth and opacity patterns as a response to environmental factors and fish metabolism ? A DEB-based framework - Archive ouverte HAL Accéder directement au contenu
Rapport (Rapport De Recherche) Année : 2009

Can we model otolith growth and opacity patterns as a response to environmental factors and fish metabolism ? A DEB-based framework

Résumé

This report presents a conceptual and numerical model of the formation of fish otoliths within a DEB-based (Dynamic Enerby Budget) framework. The proposed model relies on two mains assumptions: 1. The precipitation of the calcium carbonate in the endolymph is controlled by organic precursors; 2. The activity of these organic precursors can be modelled as a DEB product, i.e. as a function of metabolic fluxes, such as somatic growth and maintenance fluxes; 3. The existence of a temperature-driven effect on the dynamics of the precipitation of calcium carbonate for given conditions in the activities of ionic precursors; From these assumptions, a DEB-based otolith model is described relating the dynamics of the otolith growth and opacity to temperature and feeding conditions. An extension to the simulation of otolith images is presented. This model is shown to conform to a number of well-known facts on otolith. Besides, comparisons between model simulations and real otolith patterns are reported for different cases: otolith data from rearing experiments and otolith patterns from two different cod stocks, namely Barents sea cod and North Sea cod. This example illustrates the great potential of the proposed approach.
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Dates et versions

hal-02161361 , version 1 (20-06-2019)

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  • HAL Id : hal-02161361 , version 1

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Ronan Fablet, Laure Pecquerie, Hans Hoie, Aurélie Jolivet, Richard Millner, et al.. Can we model otolith growth and opacity patterns as a response to environmental factors and fish metabolism ? A DEB-based framework. [Research Report] University of California (University of California); Department of biology (University of Bergen); Laboratoire des sciences de l'environnement marin (UMR CNRS 6539 - Institut Universitaire Européen de la Mer (IUEM) - Université de Bretagne Occidentale (UBO) - Institut de Recherche pour le Développement (IRD)); Centre for Environment, Fisheries & Aquaculture Science (Centre for Environment, Fisheries & Aquaculture Science); National Institute of Aquatic Resources, Technical University of Denmark (National Institute of Aquatic Resources, Technical University of Denmark); Vrje Universiteit, Department of theoretical biology (Vrje Universiteit, Department of theoretical biology); Institut français de recherche pour l'exploitation de la mer (IFREMER); Laboratoire en sciences et technologies de l'information, de la communication et de la connaissance (UMR CNRS 6285 - Télécom Bretagne - Université de Bretagne Occidentale - Université de Bretagne Sud - ENSTA Bretagne - Ecole Nationale d'ingénieurs de Brest). 2009, pp.23. ⟨hal-02161361⟩
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