Vagner Marie

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Research officer (CR2 CNRS)
La Rochelle University
Research team : AMARE (50%) et DYFEA (50%)

Keywords : physiological and ecophysiological performances, mullet, highly unsaturated fatty acids (HUFA n-3), temperature, global change, Pertuis charentais ecosystem, matter flows, trophic web

- PhD 2004-2008: Ifremer Plouzané - direction: J. Person-Le Ruyet
- Post-doctorat 2009-2011: ISMER Rimouski (Québec, Canada). direction: C. Audet
- Post-doctorat 2011-2013: UMR LIENSs CNRS- Université de La Rochelle. Responsable scientifique: C. Lefrançois
- ATER 2013-2014: UMR EBI 7267 CNRS -Université de Poitiers.

Research topics
Contribution of fish compartment to coastal ecosystem functioning

/ The ecosystem response to global change is directly dependent on the response of the population and therefore on the response of the organisms that constitute them. In this context, I use a multi-scale approach connecting different levels of biological integration to understand the response of the highly productive coastal ecosystem of the “Pertuis charentais” to global change. I focus on the response of the under-studied but valuable fish compartment to two factors varying with global change: the reduced availability of essential fatty acids (HUFA n-3) in the food web, combined with the temperature rise.
My research activities aim to:

  • Study the individual fish responses to the variability of these factors;
  • Assess the impacts of these physiological responses on the energy flows within the food web and thus on its overall functioning.

Main collaborations :
- UMR LEMAR 6539 Brest;
- ISMER Rimouski (Canada);
- Institut Maurice Lamontagne Mont-Joli (Canada);
- UMR EBI 7267 Poitiers;
- UMR IPHEP 7262 Poitiers;

Publications :

  • Vagner M, Lacoue-Labarthe T, Zambonino Infante JL, Mazurais D, Dubillot E, Le Delliou H, Quazuguel P, Lefrançois C (2015) Depletion of essential fatty acids in the food source affects aerobic capacities of the golden grey mullet Liza aurata in a warming seawater context. PLoS ONE 10(6) : e0126489. DOI: 10.1371/journal.pone.0126489
  • Vagner M, Zambonino-Infante JL, Mazurais D, Imbert-Auvray N, Ouillon N, Dubillot E, Le Delliou H, Akbar D, Lefrançois C (2014) Reduced n-3 highly unsaturated fatty acids dietary content expected with global change reduces the metabolic capacity of the golden grey mullet. Marine Biology 161(11) : 2547–2562. DOI: 10.1007/s00227-014-2526-3
  • Dupont-Prinet A, Vagner M, Chabot D, Audet C (2013) Impact of hypoxia on the metabolism of Greenland halibut Reinhardtius hippoglossoides.Canadian Journal of Fisheries and Aquatic Sciences 70 (3), 461-469. DOI : 10.1139/cjfas-2012-0327
  • Vagner M, Robin JH, Tocher DR, Zambonino Infante JL, Person-Le Ruyet J (2009) Ontogenic effects of early feeding of sea bass (Dicentrarchus labrax) larvae with a range of dietary n-3 HUFA levels on the functioning of polyunsaturated fatty acid desaturation pathways. British Journal of Nutrition 101, 1452-1462. DOI : 10.1017/S0007114508088053
  • Vagner M, Lefrançois C, Ferrari S, Satta A, Domenici P (2008) The effect of acute hypoxia on swimming stamina at optimal swimming speed in flathead grey mullet Mugil cephalus. Marine Biology 155, 183-190. DOI : 10.1007/s00227-008-1016-x.
  • Vagner M, Robin JH, Zambonino Infante JL, Person J (2007) Combined effects of dietary HUFA level and temperature on the sea bass (D. labrax) larvae development. Aquaculture 266, 179-190. DOI : 10.1016/j.aquaculture.2007.02.040.