Moules Hybrides (2018)
Mytilus sp. hybridization on the French Atlantic coast and implication in biomonitoring
Ifremer Coordination | Type of project | Financing | Project duration | Link |
R. Sussarellu (LEX) | National | Agence Française de la Biodiversité | 2018 |
The presence of different species of the genus Mytilus and their hybridization is a parameter measured on a voluntary basis by certain North Sea countries for the monitoring of the biological effects of chemical contaminants within the framework of the CEMP program (Coordinated Environmental Monitoring Program) of the OSPAR Regional Seas Convention. As this hybridization can potentially influence the physiological response and the bioaccumulation capacity of hybrid individuals, it seems relevant to develop in France the measure of this parameter which could be extended to the IFREMER ROCCH network for chemical contamination and the European Marine Strategy Framework Directive within the descriptor 8 "chemical contaminants and biological effects”.
The objective of this study was i) to evaluate the evolution of the distribution on the French coast of M. edulis and M. galloprovincialis for 35 years using the ROCCH tissue bank, ii) to determine the differences in bioaccumulation and biomarker responses between M. edulis and M. galloprovincialis and their hybrids via in situ transplantation.
Ifremer staff | Academic partners |
T. Chouvelon (LBCM), A. Grouhel (ROCCH), Y. Aminot (LBCO), T. Burgeot (LEX), A. Mauffret (DCSMM), F. Akcha (LEX), J. Rouxel (LEX), L. Degremont (SGMM), J.B. Lamy (SGMM) | Toxem, Research Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), Plentzia, Basque Country, Spain, BOREA Univ Caen-Normandie |
Principle results :
The evolution of the prevalence of the two species of M. edulis and M. galloprovincialis on some ROCCH sites between 1981 and 2016 shown shifts in genetic composition . The cause of these changes and in particular a link potential with mussel farming practices remains to be clarified. For stations where a change is observed, a reinterpretation of historical ROCCH data taking into account the genetic factor may shed light on the interest of applying this criterion and possibly extending it to other sites retrospectively.
Whether at the level of biological parameters, ecotoxicological markers, or the bioaccumulation of chemical contaminants, differences were observed between groups tested in situ of the species M. edulis and M. galloprovincialis and their hybrids. A clear trend could be identified regarding the ability of one or the other species to accumulate more or less chemical contaminants, the differences observed between species being contaminant-specific.
Publications:
Sussarellu Rossana, Chouvelon Tiphaine, Grouhel-Pellouin Anne (2019). Compréhension de l’hybridation des moules du genre Mytilus en Atlantique et implications pour la bio-surveillance. Rapport final. https://archimer.ifremer.fr/doc/00665/77677/.
Sussarellu, R., Chouvelon, T., Aminot, Y., Couteau, J., Loppion, G., Dégremont, L., Lamy, J. B., Akcha, F., Rouxel, J., Berthelin, C., Briaudeau, T., Izagirre, U., Mauffret, A., Grouhel, A., & Burgeot, T. (2022). Differences in chemical contaminants bioaccumulation and ecotoxicology biomarkers in Mytilus edulis and Mytilus galloprovincialis and their hybrids. Environmental Pollution, 292, 118328. https://doi.org/10.1016/J.ENVPOL.2021.118328.