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CHALOUPE: Dynamics of Exploited Marine Biodiversity & Fisheries Viability

This project aims to understand the changes in marine ecosystems and the impact on fisheries viability, biodiversity, and economic value. It will study three different systems and develop models to simulate future scenarios.

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CHALOUPE: Dynamics of Exploited Marine Biodiversity & Fisheries Viability

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  1. CHALOUPEGlobal change, dynamics of exploited marine biodiversity and viability of fisheries Funded by the French national Agency of research – Call 2005 "Biodiversity" managed by the French Institute of Biodiversity 3.5 M€ for 3 years (2006-2008) Coordination : Fabian BLANCHARD, Ifremer-Cayenne, French Guyana

  2. Context •  major changes(global changes) • in marine ecosystems (human activities; climate change) • of human activities depending on these ecosystems, in particular fisheries •  uncertainties • changes in and losses of biodiversity of marine communities, and risks of irreversible changes • consequences in terms of economic value and of the viability of fisheries adaptation capacity ? • of communities • of current marine living resources harvesting modes

  3. Economic & institutional context Harvesting dynamics Ecological dynamics Human impacts, Climate change Research object : The evolution of exploited marine communities – fisheries systems • Interfaces between ecological and socio-economic systems • Dynamics depend on interactions between ecological and economic processes • Influence of many forcing factors : • climate and ocean • institutional framework • economic context

  4. Temperate continental shelf of the Bay of Biscay Moroccan upwelling area Amazonian continental shelf of the French Guyana Objective • identify the main drivers of bio-economic changes in three systems over the past decades  Contribute to the definition of scenarios of future changes in these three systems

  5. More precisely… At the ecosystem scale, for 2 or 3 past decades, • Identify the environmental changes (due to cycles or climate changes) • Identify the biodiversity changes of the demersal marine community of the continental shelf in relation to the environmental changes described previously and the impact of fishing • Identify the economic context and the institutional framework as well as their changes • Identify the changes within the fisheries in relation to biodiversity changes and economic and institutional changes

  6. Structure… Work Package 1 - Changes in community : temporal variability and trends of the physical environment and fishing effects; WP 2 - Changes in fisheries : biodiversity changes (described in WP1), and economic and institutional context; WP 3 - Diagnosis on the ecological and economic status and viability conditions of the communities/fisheries systems; WP 4 – Simulation models of the communities/fisheries systems

  7. Method : an integrated approach Data collection / synthesis • environmental monitoring (physical factors) • scientific fishing surveys (biological sampling) • fishing fleet monitoring systems (structure, metiers, production) • evolutions in the economic and institutional contexts of fishing Time series analysis • Indicators of the temporal variations of the systems (biological communities, fisheries) • Trend analyses (temporal trends of the indicators) • relationships between the observed indicator trends (correlations, multivariate analyses, qualitative combination) Modeling of the studied processes •  Results of the simulations will be compared to the observed temporal trajectories to support the interpretations from time series analyses.

  8. Partnership Ecological Dynamics Ifremer (Fisheries Sciences, Ecology And Modeling, tropical Fishereis Sciences) National Institute of Fisheries Science Research (Morocco) Dynamiques économiques Ifremer (Marine Economics) Univ. Bretagne Occidentale (Law and economics of the Sea) CNRS-Museum World Fish Center Modélisation IRD (Upwelling Ecosystems) CNRS-Museum World Fish Center ENI-Brest (Virtual Reality) Univ. Littoral (informatics)

  9. Indice upwelling Facteurs hydro-climatiques

  10. Golfe de Gascogne Blanchard et al., 2006 Impacts sur les peuplements de fonds…

  11. Dynamiques économiques associées à ces changements… Kifani et al., 2006 Steinmetz et al., 2007; LeFloc'h et al., 2007 Baisse de la valeur totale produite/Faible dépendance des prix aux apports locaux

  12. Analyse conjointe économique et écologique - cas Gascogne Steinmetz et al., 2007; LeFloc'h et al., 2007

  13. L'exemple de la crevette et de la frégate sur le plateau de Guyane L'exemple de la langoustine et du merlu dans le golfe de Gascogne Martinet et al., 2007 Martinet et Blanchard, 2007 Dans ce contexte, quelle viabilité des systèmes étudiés ? Etude des domaines de co-viabilité des systèmes d’exploitation et des systèmes biologiques exploités Nature des contraintes: • écologiques (conditions de renouvellement, niveaux acceptables de perturbation) • économiques (rémunération minimale des facteurs de production) • sociales (conditions d’existence des systèmes d’exploitation)

  14. Modélisation Développement de différents types de modèles pour la compréhension des changements observés au sein des systèmes et de leur causes

  15. http://www.projet-chaloupe.fr

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