Staff

MARTIGNAC François

Scientist Theme(s) : Spatial dynamics, connectivity, habitat and functional area Ecosystems assessment and multiple anthrophic pressure Phone: +33 2 23 48 56 25 Email : francois.martignac@inrae.fr Address: UMR DECOD, 65 rue de Saint-Brieuc, Bât. 19 , CS 84215, 35042 Rennes Cedex, France Keywords: Hydrobiology, Hydroacoustics, Diadromous fish, Ecological continuity

Expertise

Hydroacoustics, Aquatic ecology, Ichthyology, Ecological continuity, Hydrobiology

Career

• Since 2022: Coordinator of the Savoir-Faire scientic pillar
• Since 2019: Research Engineer, INRAE, UMR ESE, Rennes
• 2018-2019: Hydrobiology and hydroacoustics independent consultant, Rennes
• 2017-2018: Research Engineer, INRAE, UMR ESE, Rennes
• 2010-2017: Hydrobiology consultant, ASCONIT CONSULTANTS, Nantes (2013 to 2016: Ph.D. student, supervised by J. Guillard, J.L. Baglinière et D. Ombredane

Research

Current Research Topics

My research is at the interface between applied and basic research. The projects in which I am involved aim to improve biological knowledge of fish fauna by developing innovative methods, such as hydroacoustics, and by promoting their use by scientists and managers of aquatic environments. The techniques are non-intrusive, transposable, and are not highly influenced by environmental conditions. Consequently, they are relevant additional tools, or effective alternative methods, to acquire data that are difficult to access using the techniques currently used to monitor aquatic fauna.

Within the OFB – INRAE – L'institut Agro/Agrocampus Ouest – UPPA research centre, my work focuses on analysing migration dynamics, phenology and the dispersal mechanisms of diadromous fish, in the context of ecological connectivity restoration, especially in rivers, and global changes. My expertise in hydroacoustic methods enables me to use these innovative techniques in different environments (rivers, estuaries, coastal or marine) with tools adapted to the constraints and scientific issues. Acoustic cameras, due to their limited range and their fine image resolution, are commonly used horizontally in shallow water, whereas split-beam echosounders are more adapted in vertical and mobile surveys at greater depths.

Collaborations

• CARRTEL Research Unit, INRAE - Université Savoie Mont-Blanc, Thonon-les-Bains, France
• LPO, Réserve Naturelle Nationale des Sept-Iles, Perros-Guirec, France
• UMR LETG, CNRS - Université de Rennes 2, Rennes, France
• Environment Agency, Warrington, Angleterre
• Natural Resources Wales, Cardiff, Pays de Galles
• ICES Working Group on Fisheries Acoustics, Science and Technology member

Current projects

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