Molecular and behavioural responses of the mussel Mytilus edulis exposed to a marine heatwave
Langue
EN
Article de revue
Ce document a été publié dans
Marine Environmental Research. 2024-02-22, vol. 196, p. 106418
Résumé en anglais
Marine heatwaves (MHW) threaten marine organisms and tend to increase in frequency and intensity. We exposed the blue mussel Mytilus edulis to a MHW lasting 23 days, including two 10-d periods of thermal intensity increase ...Lire la suite >
Marine heatwaves (MHW) threaten marine organisms and tend to increase in frequency and intensity. We exposed the blue mussel Mytilus edulis to a MHW lasting 23 days, including two 10-d periods of thermal intensity increase of +5 °C (20 °C–25 °C) interspersed by 1 day back to 20 °C, followed by a 4-d recovery period. We investigated behaviour responses of mussels and gene expression changes relative to the circadian rhythm (Per), oxidative stress (SOD), cellular apoptosis (CASP3), energy production (ATPs), and general stress response (hsp70). Results showed that the MHW disturbed the valve activity of mussels. Particularly, mussels increased the number of valve micro-closures, showing a stressful state of organisms. Mussels also decreased Per, CASP3, ATPs, and Hsp70 gene expression. Some behavioural and molecular effects persisted after the MHW, suggesting a limited recovery capacity of individuals. This work highlighted the vulnerability of M. edulis to a realistic MHW.< Réduire
Mots clés en anglais
Marine heatwave
Mollusc bivalve
Mussel
Valve behaviour
gene expression
Project ANR
Contamination des eaux côtières aux filtres UV due à la fréquentation du littoral pendant les canicules: paramètres comportementaux et bioénergétiques permettant de mesurer les Effets et d'identifier des biomarqueurs d'alerte précoce - ANR-18-CE34-0012