Le risque thermique : caractérisation des environnements thermiques des 3 sites atliers de MOREST en lien avec les mortalités observées sur le terrain

Temperature affects undoubtedly the 3 working sites where, systematically, the observation of the first abnormal mortalities coincides with a water temperature of around 19°C. The nature of the processes implied could have a "cumulative" effect, affecting the physiology (this phenomenon has been observed with other marine species) or a "threshold" effect, acting only as a trigger. The question has not been answered yet. The kinetics of the thermic evolution around the mortality period has to be studied in depth in order to understand if this temperature acts more as an "associated factor", during a chronic stress period, or during an acute stress, as suggested by the "on-bottom/off bottom" mortality model of the Marennes Oléron Bay [12].