Thèse de doctorat en Sciences économiques
Soutenue le 20-06-2014
Le président du jury était Hippolyte d' Albis.
Les interactions entre aquaculture et pêche captive, et la viabilité comme approche de gestion du risque dans l'exploitation des écosystèmes
Les interactions entre aquaculture et pêche captive, et la viabilité comme approche de gestion du risque dans l'exploitation des écosystèmes.
The world of ﬁsheries is complex, dynamic and contested. At the core of ﬁshery management lie technical challenges but also fundamental socioeconomic issues such as valuation and ownership. So far, as for other natural resources, ﬁsheries resources have been largely over exploited and alarms from the scientiﬁc community on rapidly declining stocks and species disappearance have been repeatedly published. In what follows, I ﬁrst strive to explain the repeated failures to manage ﬁsheries in a sustainable way. In this perspective, I overview existing management instruments and the weaknesses of ﬁsheries governance. Next, I raise the main challenges faced by the aquaculture industry to take over on capture ﬁsheries, as a sustainable source of food security. This leads us to an introduction to the two ﬁrst chapters of this dissertation, which focuses on the economic and ecological impacts of the expansion of aquaculture, and its implications for the capture ﬁshery sector. Finally, I expose the complexity of managing harvested ecosystems under uncertainty, in practice. Thus, I present the third chapter of this dissertation which puts forward a theoretical management framework grounded in viability theory to deals with risk, ecosystem dynamics and conﬂicting sustainability objectives. In particular, I examine the diﬀerent analytical possibilities provided by this framework to handle uncertain dynamics.