title: Validation of trophic and anthropic underwater noise as settlement trigger in blue mussels.
abstract: Like the majority of benthic invertebrates, the blue mussel Mytilus edulis has a bentho-pelagic cycle with its larval settlement being a complex phenomenon involving numerous factors. Among these factors, underwater noise and pelagic trophic conditions have been weakly studied in previous researches. Under laboratory conditions, we tested the hypothesis that picoplankton assimilation by the pediveliger blue mussel larvae acts as a food cue that interacts with anthropic underwater sound to stimulate settlement. We used (13)C-labeling microalgae to validate the assimilation of different picoplankton species in the tissues of pediveliger larvae. Our results clearly confirm our hypothesis with a significant synergic effect of these two factors. However, only the picoeukaryotes strains assimilated by larvae stimulated the settlement, whereas the non-ingested picocyanobacteria did not. Similar positive responses were observed with underwater sound characterized by low frequency vessel noises. The combination of both factors (trophic and vessel noise) drastically increased the mussel settlement by an order of 4 compared to the control (without picoplankton and noise). Settlement levels ranged from 16.5 to 67% in 67 h.
authors.affiliation: Institut Universitaire Européen de la Mer (UMR CNRS 6539), Université de Bretagne Occidentale, rue Dumont d'Urville, F-29280 Plouzané, France.|TBM environnement/Somme, 115 rue Claude Chappe, Technopole Brest Iroise, F-29280 Plouzané, France.
authors.forename: Aurélie
authors.initials: A
authors.lastname: Jolivet
authors.affiliation: Institut des sciences de la mer, Université du Québec à Rimouski, 310 allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada.
authors.forename: Rejean
authors.initials: R
authors.lastname: Tremblay
authors.affiliation: Institut des sciences de la mer, Université du Québec à Rimouski, 310 allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada.|Muséum national d'Histoire naturelle, (UMR BOREA 7208, CNRS/MNHN/UPMC/IRD), 61 rue Buffon, CP53, 75231 Paris Cedex 05, France.
authors.forename: Fréderic
authors.initials: F
authors.lastname: Olivier
authors.affiliation: Chaire CHORUS, fondation Grenoble INP, GIPSA-LAB, Grenoble INP et CNRS, 11 rue des Mathématiques, Domaine Universitaire, BP 46 F-38402 Saint Martin d'Heres cedex, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Gervaise
authors.affiliation: Institut des sciences de la mer, Université du Québec à Rimouski, 310 allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada.|Department of Fisheries and Oceans Canada, Gulf Fisheries Centre, Science Branch, P.O. Box 5030, Moncton, Nouveau-Brunswick, E1C 9B6, Canada.
authors.forename: Rémi
authors.initials: R
authors.lastname: Sonier
authors.affiliation: Institut des sciences de la mer, Université du Québec à Rimouski, 310 allée des Ursulines, Rimouski, Québec, G5L 3A1, Canada.
authors.forename: Bertrand
authors.initials: B
authors.lastname: Genard
authors.affiliation: Institut Universitaire Européen de la Mer (UMR CNRS 6539), Université de Bretagne Occidentale, rue Dumont d'Urville, F-29280 Plouzané, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: Chauvaud
mesh_terms: D000818:Animals; D007814:Larva / Q000254:growth & development; D058086:Microalgae; D049880:Mytilus edulis / Q000254:growth & development*; D009622:Noise