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Registros recuperados: 75
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A bio-economic analysis of long term changes in the production of French fishing fleets operating in the Bay of Biscay ArchiMer
Steinmetz, Fabien; Thebaud, Olivier; Blanchard, Fabian; Le Floc H, Pascal; Bihel, J.
Selective fishing pressure on more highly valued marine living resources is one of the key factors proposed to explain changes occurring in fish communities and associated landings of commercial fisheries. The aim of this paper is to establish the nature of changes in the landings of French fishing fleets operating in the Bay of Biscay in the period 1973-2002, and whether these changes could be related to the relative economic attractiveness of different fish species. The analysis focuses on trends observed in the landings of all commercial fish species over the last three decades. It is based on data of annual quantities landed and ex-vessel prices compiled from official French landings records, and on bio-geographical descriptors of these species derived...
Tipo: Text Palavras-chave: North Eastern Atlantic; Bay of Biscay; Long term changes; Bio economic analysis; French fisheries production.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-5926.pdf
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A comparative review of the fisheries resource management systems in New Zealand and in the European Union ArchiMer
Marchal, Paul; Lallemand, Philippe; Stokes, Kevin; Thebaud, Olivier.
This review aims at comparing the fisheries management systems existing in New Zealand and in the European Union. The involvement of stakeholders at all stages of the management process is generally more transparent and better established in New Zealand than in the EU. Both systems aim at achieving an adequate balance between sustainability and utilisation and consider the precautionary approach as a founding principle. The social objectives are probably more explicit in the EU management system. In New Zealand, B-MSY is a legal management target for all stocks in the quota management system (QMS), but management strategies were poorly explicit until most recently. In the EU, there have not been any legal management targets or strategies until 1999. Since...
Tipo: Text Palavras-chave: Fisheries; Total allowable catches; Rights based management; Quota; Atlantic Ocean; Pacific Ocean.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11167/7534.pdf
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A dynamic model of the Bay of Biscay pelagic fleet simulating fishing trip choice: the response to the closure of the European anchovy (Engraulis encrasicolus) fishery in 2005 ArchiMer
Vermard, Youen; Marchal, Paul; Mahevas, Stephanie; Thebaud, Olivier.
The scope of this paper is to describe, evaluate, and forecast fishing trip choices of the Bay of Biscay pelagic fleet using random utility modeling (RUM). First, alternative fishing trip choices of this fleet were identified using multivariate statistical methods based on species landings weighted by value and defined as distinct fishing activity or fisheries (termed metiers). A RUM was specified, which included trip components as attributes during the period 20012004 ( a lagged percentage of the value per unit of effort of the main species caught, total value per unit of effort, and inertia in terms of changes from one metier to another). For the main metiers, the proportion of correct effort allocation is 90% during the calibration period of 2001-2004....
Tipo: Text Palavras-chave: Management; Métier; Fishing effort; Fisher's behavior; RUM.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6096.pdf
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A Quantitative Metric to Identify Critical Elements within Seafood Supply Networks ArchiMer
Plaganyi, Eva E.; Van Putten, Ingrid; Thebaud, Olivier; Hobday, Alistair; Innes, James; Lim-camacho, Lilly; Norman-lopez, Ana; Bustamante, Rodrigo H.; Farmery, Anna; Fleming, Aysha; Frusher, Stewart; Green, Bridget; Hoshino, Eriko; Jennings, Sarah; Pecl, Gretta; Pascoe, Sean; Schrobback, Peggy; Thomas, Linda.
A theoretical basis is required for comparing key features and critical elements in wild fisheries and aquaculture supply chains under a changing climate. Here we develop a new quantitative metric that is analogous to indices used to analyse food-webs and identify key species. The Supply Chain Index (SCI) identifies critical elements as those elements with large throughput rates, as well as greater connectivity. The sum of the scores for a supply chain provides a single metric that roughly captures both the resilience and connectedness of a supply chain. Standardised scores can facilitate cross-comparisons both under current conditions as well as under a changing climate. Identification of key elements along the supply chain may assist in informing...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00250/36163/34722.pdf
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A retrospective analysis of the effects of adopting individual transferable quotas in the Tasmanian red rock lobster, Jasus edwardsii, fishery ArchiMer
Hamon, Katell; Thebaud, Olivier; Frusher, Stewart; Little, L. Richard.
Individual transferable quotas (ITQ) were implemented in the Tasmanian red rock lobster fishery in 1998 and ten years later we assessed the impacts on the fishery. Particular attention was devoted to investigating the performances of the fishery with regard to three features identified as major impacts in the literature: rationalization of the fishing fleet, change in fishing strategy in order to maximise the fisher's profit and concentration of fishing rights and activity. On average, the fishery reacted as expected and reached its objective in terms of reconstruction of the biomass, but the overall assessment in terms of resulting profitability is not very conclusive. There is no evidence of decrease of the profitability over the period of the study but...
Tipo: Text Palavras-chave: ITQ; Economic effects; Red rock lobster fishery; Jasus edwardsii; Australia.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11173/7529.pdf
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A stochastic viability approach to ecosystem-based fisheries management ArchiMer
Doyen, Luc; Thebaud, Olivier; Bene, Christopher; Martinet, V.; Gourguet, S.; Bertignac, Michel; Fifas, Spyros; Blanchard, Fabian.
Academia and management agencies show a growing interest for ecosystem-based fishery management (EBFM). However, the way to operationalize this approach remains challenging. The present paper illustrates how the concepts of stochastic co-viability, which accounts for dynamic complexities, uncertainties, risk and sustainability constraints, can be useful for the implementation of EBFM. In the present case, this concept is used to identify fishing strategies that satisfy both ecological conservation and economic sustainability in a multi-species, multi-fleet context. Economic Viability Analysis (EVA) and the broader Co-Viability Analysis (CVA), are proposed to expand the usual Population Viability Analysis (PVA) and precautionary approach. An illustration is...
Tipo: Text Palavras-chave: Ecosystem based fisheries management; Viability; Stochastic; Nephrops; Hake.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00074/18571/16153.pdf
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A typology of fisheries management tools ArchiMer
Boncoeur, Jean; Guyader, Olivier; Thebaud, Olivier.
This paper provides a classification of fisheries management measures which is based on a typology developped by Boncoeur and Troadec (2003). This typology was discussed as part of the TECTAC research project, and amended to provide the following conceptual framework. Fisheries management tools may be classified according to their purpose, to the regulation method on which they rely, and to the control variable(s) which they use. The typology presented in this paper relies on these three criteria
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Ano: 2006 URL: http://archimer.ifremer.fr/doc/00243/35400/33920.pdf
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Adaptive behaviour of fishers to external perturbations: simulation of the Tasmanian rock lobster fishery ArchiMer
Hamon, Katell; Frusher, Stewart; Little, L. Richard; Thebaud, Olivier; Punt, André E..
The rock lobster, Jasus edwardsii, lies on a global “hotspot” for climate change in the southeastern Australian state of Tasmania. The short-term effects of climate change are predicted to lead to an increasing exploitable biomass in the south and declining biomass in the north of the state. The future of the fishery is highly uncertain due to climate change, but also due to insecurities linked to the market conditions. The market for Tasmanian rock lobster is driven by the demand of a single market, China, which absorbs 75 % of the catch. This study examines how fishers can adapt to external perturbations that affect the social and economic viability of the fleet and the ecological dynamics of the stock. Three fleet dynamic models of increasing complexity...
Tipo: Text Palavras-chave: Tasmanian rock lobster; Fleet dynamics; Fishers behaviour; Climate change.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00171/28219/27542.pdf
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Analyzing the market position of fish species subject to the impact of long-term changes: a case study of French fisheries in the Bay of Biscay ArchiMer
Le Floc' H, P; Poulard, Jean-charles; Thebaud, Olivier; Blanchard, Fabian; Bihel, J; Steinmetz, Fabien.
Market position and its evolution were analysed in nine key fish and cephalopod species subject to long-term changes, using the Bay of Biscay fisheries as a case study. Although such long term changes have already been documented, and in some cases shown to be related to the impacts of fishing, changes in the physical environment, or both, relatively little work has been devoted to their potential consequences in economic terms. The nature and extent of these consequences was determined in the present study by looking at the composition of the affected fish production, and the status of different fish products on the markets. We propose a methodology to characterize market position for this set of nine species. The selected species represent a significant...
Tipo: Text Palavras-chave: Atlantic Ocean; Fish market; Macro economic aggregates; Environmental change.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4716.pdf
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Bioeconomic model of the dynamics of fisheries facing global economic and environment changes: the French Guyana shrimp fishery ArchiMer
Chaboud, Christian; Thebaud, Olivier.
In the past two decades, the French Guyana shrimp fishery has known dramatic evolutions, largely driven by global changes. On the economic side, two major driving factors are the globalization of the shrimp market, with a decreasing trend in real prices, an d the long-term increase in fuel prices worldwide. On the environmental side, recruitment of the two main species of shrimp targeted in the fishery seems to have decreased over the last decade. This decrease is probably related to hydroclimatic modifications linked to global change. It is important to assess the adaptive capacity of the fishery facing such changes, as well as the relevance of past and future public policies to improve this capacity. A key component of this adaptive capacity is the way...
Tipo: Text Palavras-chave: Bioeconomic modeling; Fishery management; Subsidies; Shrimp; French Guyana.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00243/35473/33988.pdf
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Changement global, dynamique de la biodiversité marine exploitée et viabilité des pêcheries (Rapport final du projet CHALOUPE) ArchiMer
Blanchard, Fabian; Thebaud, Olivier.
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Ano: 2009 URL: http://archimer.ifremer.fr/doc/00076/18686/16236.pdf
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Combining fleet dynamics and population dynamics for a volatile fishery: the example of the anchovy fishery of the Bay of Biscay ArchiMer
Vermard, Youen; Lehuta, Sigrid; Mahevas, Stephanie; Thebaud, Olivier; Marchal, Paul; Gascuel, Didier.
It is increasingly recognized that fisher‟s behavior should be taken into account to understand and predict fishery dynamics, in particular in response to management. ISIS-Fish is a spatially and seasonally explicit modeling framework especially designed to couple populations and fleets dynamics and explore the impact of various management measures on mixed fisheries. It has already been set up using a static fishing effort allocation (corresponding to an average historical pattern) between the various métiers to simulate the pelagic fishery in the Bay of Biscay. We present here the integration of a fleet dynamics model. This model is derived from a Random Utility Model simulating métiers choice using as explanatory variables the past value per unit...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00107/21858/19449.pdf
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Conséquences économiques de l'évolution de l'environnement dans l'estuaire de la Seine sur la pêche professionnelle - Rapport final du projet-Programme Seine Aval II ArchiMer
Thebaud, Olivier; Boncoeur, Jean; Curtil, Olivier; Guyader, Olivier; Jezequel, Michele; Martin, A.; Soulie, Jean-christophe; Tetard, Alain.
Le projet de recherche s'intègre dans deux actions du programme Seine-Aval II : Action R.IV-F° (2001-2002) - Coût de la disparition de l'activité halieutique, et Action R.IV-G (2002-2003) - Elaboration de scénarios d'évolution. L'objectif de la recherche était de développer les connaissances et outils permettant d'évaluer les conséquences, pour les entreprises de pêche exploitant la baie de Seine, de changements (transitoires ou durables) affectant l'écosystème estuarien.
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Ano: 2003 URL: http://archimer.ifremer.fr/doc/00080/19078/16673.pdf
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Defining viable recovery paths toward sustainable fisheries ArchiMer
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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Designing indicators for assessing the effects of marine protected areas on coral reef ecosystems: A multidisciplinary standpoint ArchiMer
Pelletier, Dominique; Garcia Charton, Jose; Ferraris, Jocelyne; David, Gilbert; Thebaud, Olivier; Letourneur, Yves; Claudet, Joachim; Amand, Marion; Kulbicki, Michel; Galzin, René.
The present paper aims at identifying and assessing indicators of the effects of Marine Protected Areas (MPAs) in coral reef regions, based on a bibliography review in ecology, economics and social sciences. First the various effects Studied within each of these domains and the variables used to measure them were censused. Potential ecological indicators were assessed through their link with the question used (here termed "relevance") and their "effectiveness" which encompasses the issues of precision, accuracy and statistical power. Relevance and effectiveness were respectively measured by the frequency of use of each indicator and the proportion of significant results in the reviewed articles. For social and economic effects, the approach was not...
Tipo: Text Palavras-chave: Coastal management Coral reef ecosystems Pluridisciplinary Ecological; Economic and social indicators Marine Protected Areas.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-409.pdf
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Distributional issues in the operation of rights-based fisheries management systems ArchiMer
Guyader, Olivier; Thebaud, Olivier.
Rights-based management regimes are considered by economists as an important solution to the problems of excess capacity and biological over-harvesting of fisheries. In practice, adoption of such regimes, and particularly of those relying on individual quota allocations, has often met with resistance from within the fisheries concerned. A key reason for this resistance appears to be the distributional conflicts which arise in the process of implementing the regimes. An economic analysis of the nature of these conflicts in the different contexts in which they have been observed is proposed. The approach centres on the way in which distributional conflicts can influence the operation of management systems and their impacts on fisheries, from the country to...
Tipo: Text Palavras-chave: Fisheries management; Rights-based management; Individual transferable quotas; Distributional issues; Economic simulation.
Ano: 2001 URL: https://archimer.ifremer.fr/doc/00244/35524/34808.pdf
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Does size matter? An assessment of quota market evolution and performance in the Great Barrier Reef fin-fish fishery ArchiMer
Innes, James; Thebaud, Olivier; Norman-lopez, Ana; Little, L. Richard.
In fisheries managed using individual transferable quotas (ITQs) it is generally assumed that quota markets are well-functioning, allowing quota to flow on either a temporary or permanent basis to those able to make best use of it. However, despite an increasing number of fisheries being managed under ITQs, empirical assessments of the quota markets that have actually evolved in these fisheries remain scarce. The Queensland Coral Reef Fin-Fish Fishery (CRFFF) on the Great Barrier Reef has been managed under a system of ITQs since 2004. Data on individual quota holdings and trades for the period 2004-2012 were used to assess the CRFFF quota market and its evolution through time. Network analysis was applied to assess market structure and the nature of...
Tipo: Text Palavras-chave: Catch shares; Great Barrier Reef; Line fishery; Market efficiency; Social network analysis; Transaction costs.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00230/34112/32587.pdf
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Données économiques maritimes française. 2001 ArchiMer
Daures, Fabienne; Girard, Sophie; Guyader, Olivier; Kalaydjian, Regis; Kerautret, Sylvie; Le Roux, Johann; Perez, Jose; Thebaud, Olivier.
This document presents a survey of the marine-related activities in France, i.e. those of the commercial sector (exploitation of minerai and living resources, manufacturing industries, services) and those of the public sector (Navy, State services, education, safety, marine research). A chapter is devoted to the protection of the coastal and marine environment, and the chapter on tourism gives quantitative data on the impacts of the pollution caused by the Erika oil-tanker. Each activity of the commercial sector is described by key-figures (turnover, value added, employmentl. The description of the non-commercial public sector includes data on costs, including personnel costs. In addition to these figures, qualitative information is given on the recent...
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Ano: 2002 URL: http://archimer.ifremer.fr/doc/00117/22850/20660.pdf
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Données économiques maritimes francaises 2003 ArchiMer
Kalaydjian, Regis; Bihet, Guillaume; Daures, Fabienne; Girard, Sophie; Guyader, Olivier; Perez Agundez, José A.; Thebaud, Olivier; Dehez, Jeoffrey.
The document, fifth edition of a collection which has started in 1997, presents a survey of marine-related activities in France. The commercial sector includes exploitation and extraction of marine resources, manufacturing industry, private services. In this new edition, a special effort is devoted to the analysis of maritime ports related industries. The non-commercial sector includes public services, among which the Navy, state services, education, safety, marine and coastal environment protection, marine sciences. Each activity of the commercial sector is described by key figures (turnover, value added, employment). The non-commercial sector includes data on running costs, in particular personnel costs. In addition to indicators, qualitative information...
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Ano: 2004 URL: http://archimer.ifremer.fr/doc/00083/19400/16993.pdf
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Données économiques maritimes françaises 2005 ArchiMer
Kalaydjian, Regis; Daures, Fabienne; Gaignon, Jean-louis; Girard, Sophie; Guyader, Olivier; Matte, Isabelle; Mongruel, Remi; Perez, Jose; Thebaud, Olivier.
The report presents a survey of marine related activities in France, highlighting recent past trends, present situation and future outlook. The commercial sector includes marine resource exploitation, manufacturing branches and services. The public sector includes the Navy, State services, environmental protection and research. A summary identifies the main factors in the development of marine activities.
Tipo: Text Palavras-chave: Outlook; Employment; Value added; Marine; Economy; Perspectives; Emploi; Valeur ajoutée; Maritime; Économie.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-3919.pdf
Registros recuperados: 75
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