Jean-François Dewals will defend his PhD in front of the following jury:

• Katrin Zander (Kassel University), referee
• Olivier Beaumais (Université de Rouen), referee
• Marie-Estelle Binet (Université de Bretagne Occidentale), examinator
• Dorothée Brecard (Université de Toulon), examinator
• Pascal Le Floc'h (Université de Bretagne Occidentale), supervisor
• Sterenn Lucas (Institut Agro Rennes-Angers), co-supervisor
• Fabienne Daures (Ifremer), co-supervisor

Abstract

This dissertation focuses on the consumption of fishery and aquaculture products (FAPs). The aim of this work is to better understand how to guide consumers towards more sustainable consumption, in particular through the use of labels. The French market is used as a case study. This thesis demonstrates the unsustainable nature of French consumption of FAPs from an environmental and health point of view. Improving consumers' knowledge of the FAP sector is essential to guide them towards more sustainable behaviour. Although labels are a growing tool to inform and guide consumers in their consumption choices, this thesis shows that their preferences for these labelling approaches are currently very heterogeneous. Preferences for domestic FAPs are important, while ethical demand remains more secondary. Our work also shows the influence of coastal areas, with a stronger preference for local products to the detriment of ecolabels. To address this issue of heterogeneous preferences, this work is interested in the association between an ecolabel and a safety claim. It shows that the combination of two labels on the same product is not necessarily valued by consumers and that the production method (wild vs. farmed) influences consumers' preferences for these two labels.