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Eel density analysis (EDA 2.2.1). Escapement of silver eels (Anguilla anguilla) from French rivers: 2018 report

Abstract : EDA (Eel Density Analysis) is a modelling tool which allows the prediction of yellow eel densities and silver eel escapement from electrofishing survey networks. The 2018 version of EDA (2.2.1) is based on a dataset of 29 183 electrofishing operations compared to 24 541 for 2015 (version 2.2.0) and only 9 556 in the 2012 version (2.1). The larger dataset is explained by the inclusion of deep water electrofishing operations and the eel specific surveys. The model distinguishes from its 2012 (2.1) version by the prediction of eel abundance per size class, separated with boundaries 150, 300, 450, 600 and 750 mm. The model estimates the eel biomass on the French territory at 1.724 ± (1.242, 2.27) millions of silver eels in 2015. Anthropogenic impacts corresponding to the glass eel fisheries, amateur and commercial yellow eel fisheries, silver eel fisheries and turbine mortalities, will be included in the model to produce stock indicators Bcurrent, Bbest mandatory for the 2018 postevaluation of the eel management plan.
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https://hal.archives-ouvertes.fr/hal-02968910
Contributor : Laurent Beaulaton <>
Submitted on : Friday, October 16, 2020 - 11:05:34 AM
Last modification on : Thursday, November 19, 2020 - 8:57:05 AM

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  • HAL Id : hal-02968910, version 1

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Cédric Briand, Pierre-Marie Chapon, Laurent Beaulaton, Hilaire Drouineau, Patrick Lambert. Eel density analysis (EDA 2.2.1). Escapement of silver eels (Anguilla anguilla) from French rivers: 2018 report. [Research Report] EPTB Vilaine; AFB; Inra; Irstea. 2018. ⟨hal-02968910⟩

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