Utilisation de deux outils hydroacoustiques pour analyser la dynamique migratoire du saumon atlantique (Salmo salar L.) dans deux fleuves de la baie du Mont-Saint-Michel

A recent study using hydroacoustic tools reveals that the functioning of a new estuary flood-gate dam on the Couesnon River, part of the Mont-Saint-Michel Bay, does not negatively impact Atlantic salmon (Salmo salar) annual recruitment levels. However, it does influence their migration dynamics, potentially decreasing abundance or disturbing migration patterns. The study employed split-beam echosounder and DIDSON acoustic camera technologies to monitor salmon migrations in both the Couesnon River, where the dam is present, and a nearby free-flowing river, the Sélune River, for comparative analysis. These non-intrusive, turbidity-independent methods provided unprecedented insights into salmon migration dynamics, highlighting the advantages of acoustic cameras while also revealing their limitations.

Martignac, F. (2016). Utilisation de deux outils hydroacoustiques pour analyser la dynamique migratoire du saumon atlantique (Salmo salar L.) dans deux fleuves de la baie du Mont-Saint-Michel. Unpublished. https://doi.org/10.13140/RG.2.1.3486.7603