Validation of trophic and anthropic underwater noise as settlement trigger in blue mussels
|Author(s)||Jolivet Aurelie1, 2, Tremblay Rejean3, Olivier Frederic3, 4, Gervaise Cedric5, Sonier Remi3, 6, Genard Betrand3, Chauvaud Laurent1|
|Affiliation(s)||1 : Univ Bretagne Occidentale, Inst Univ Europeen Mer, UMR CNRS 6539, Rue Dumont dUrville, F-29280 Plouzane, France.
2 : TBM Environm Somme, 115 Rue Claude Chappe,Technopole Brest Iroise, F-29280 Plouzane, France.
3 : Univ Quebec Rimouski, Inst Sci Mer, 310 Allee Ursulines, Rimouski, PQ G5L 3A1, Canada.
4 : UPMC, Museum Natl Hist Nat, UMR BOREA 7208, CNRS,IRD,CP53, 61 Rue Buffon, F-75231 Paris 05, France.
5 : Domaine Univ, CNRS, 11 Rue Math,BP 46, F-38402 St Martin Dheres, France.
6 : Gulf Fisheries Ctr, Sci Branch, Dept Fisheries & Oceans Canada, POB 5030, Moncton, NB E1C 9B6, Canada.
|Source||Scientific Reports (2045-2322) (Nature Publishing Group), 2016-09 , Vol. 6 , N. 33829 , P. 8p.|
|WOS© Times Cited||21|
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 C-13-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.