5. Surpêche et effets sur la biodiversité et le fonctionnement des écosystèmes

Philippe Cury presents the basis of the ecosystem approach to fisheries, which enables to maintain the biodiversity, the catches and the jobs. He comes back to the main steps which punctuated the

With Jean-Marc Fromentin, we discover the bluefin tuna. It is fished since Antiquity, but it is subjected to strong pressure for almost three decades, which is responsible for a large decline of the

Florence Galletti proposes an overview of the law of sea, and comes back to the main associated issues. She provides several essential definitions to understand this field, comes back to its great

Christian Chaboud presents some models and issues related to the economic approach of fisheries and marine resources. He especially comes back to the Gordon Schaefer model, and to the economic

The marine environment is uneasy of access, so Pierre Chavance presents some current ways to better know the state of the marine biodiversity and resources. He focuses on the accompanying and

Laurent Dagorn presents the problem of the incidental catches in fishery, that is, what is taken off from the marine environment, but which is not sought by the fishermen. He defines the terms of this

Audrey Darnaude shows us the role and the importance of the lagoons for the functioning of the biodiversity. Thanks to examples in the Lion Gulf, she explains that the coastal productivity is closely

Sophie Bertrand presents the main forms of interaction between fishermen and birds as part of the practice of fishing: accidental catches, competition, or other unexpected effects. In order to limit

Sylvain Bonhommeau highlights the movements of many animal populations of the oceans throughout their life cycle, and so he shows the issue of the marine connectivity. The species and their movements

Philippe Cury explains how the overfishing affects the marine food webs, and he highlights some ecological consequences of this practice, like the jellyfishes proliferation or the disappearance of the

In this second part, discover the biodiversity of the oceans, from the coral reefs to the coastal lagoons. This biodiversity, of which the knowledge is still partial, is the subject of great

David Mouillot proposes an analysis of the coral reefs in terms of biodiversity and productivity. He tries to explain the importance of the coral environments for the development of wide food webs,