We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Ecosystem Viable Yields.
- Authors
Lara, Michel; Ocaña, Eladio; Oliveros-Ramos, Ricardo; Tam, Jorge
- Abstract
The World Summit on Sustainable Development (Johannesburg, 2002) encouraged the application of the ecosystem approach by 2010. However, at the same summit, the signatory States undertook to restore and exploit their stocks at maximum sustainable yield (MSY), a concept and practice without ecosystemic dimension, since MSY is computed species by species, on the basis of a monospecific model. Acknowledging this gap, we propose a definition of 'ecosystem viable yields' (EVY) as yields compatible (a) with biological safety levels (over which biomasses can be maintained for all times) and (b) with an ecosystem dynamics. The difference from MSY is that this notion is not based on equilibrium but on viability theory, which offers advantages for robustness. For a generic class of multispecies models with harvesting, we provide explicit expressions for the EVY. We apply our approach to the anchovy-hake couple in the Peruvian upwelling ecosystem.
- Subjects
WORLD Summit on Sustainable Development (2002 : Johannesburg, South Africa); MAXIMUM sustainable yield (Population ecology); ECOSYSTEM management; VIABILITY (Biology); UPWELLING (Oceanography); PERUVIANS
- Publication
Environmental Modeling & Assessment, 2012, Vol 17, Issue 6, p565
- ISSN
1420-2026
- Publication type
Article
- DOI
10.1007/s10666-012-9321-7