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| Mullon, C.; Mittaine, J-f.; Thebaud, Olivier; Peron, G.; Merino, G.; Barange, M.. |
| P>To explore the drivers of change in the complex system relating small pelagic fisheries and fishmeal/fish oil markets, to identify the interactions between these drivers and their overall impacts, we propose a bio-economic model, coupling the ecological and the economic dynamics of these global commodities. The model enables an analysis of the consequences of both global and local changes in the environment of production systems. Through sensitivity analysis of specific input parameters, we evaluate the robustness of the overall system to such changes and show that local responses of production systems and markets cannot be considered in isolation from the set of interactions at global level. |
| Tipo: Text |
Palavras-chave: Fish oil; Fishmeal; Small pelagic fisheries; Networks economics; Bio economic modeling. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6938.pdf |
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| Martinet, Vincent; Thebaud, Olivier; Doyen, L. |
| This paper develops a formal analysis of the recovery process for a fishery, from crisis situations to desired levels of sustainable exploitation, using the theoretical framework of viable control. We define sustainability as a combination of biological, economic and social constraints which need to be met for a viable fishery to exist. Biological constraints are based on the definition of a minimum resource stock to be preserved. Economic constraints relate to the existence of a guaranteed profit per vessel. Social constraints refer to the maintenance of a minimum size of the fleet, and to the maximum speed at which fleet adjustment can take place. Using fleet size adjustment and fishing effort per vessel as control variables, we first identify the states... |
| Tipo: Text |
Palavras-chave: Bio economic modeling; Fishery policies; Recovery; Sustainable fishing. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3719.pdf |
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| Soulie, J; Thebaud, Olivier. |
| Understanding the dynamics of fishing effort plays a key role in predicting the impacts of regulatory measures on fisheries. In recent years, there has been a growing interest in the use of bio-economic models to represent and analyze the short-term dynamics of fishing effort in response to regulation in the fisheries management literature. In this literature, fishing firms are usually modeled as autonomous decision-making units determining their harvest strategies so as to maximize profit, given technical and institutional constraints. The overall dynamics of a fishery is modeled as the result of these individual choices, and of interactions between individual choices due to the impacts of harvesting on the fish stock and/or problems of congestion.... |
| Tipo: Text |
Palavras-chave: Short run fisheries dynamics; Multi agent simulation; Bio economic modeling. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1893.pdf |
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