Consulta: creatorFacets:"Thebaud, Olivier"
Registros recuperados: 82
Data/hora: 29/05/2024 05:40:18

A bio-economic analysis of long term changes in the production of French fishing fleets operating in the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Modeling the global fishmeal and fish oil markets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mullon, C.; Mittaine, J-f.; Thebaud, Olivier; Peron, G.; Merino, G.; Barange, M.
P&gt;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

Integrated ecological-economic fisheries models-Evaluation, review and challenges for implementation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nielsen, J. Rasmus; Thunberg, Eric; Holland, Daniel S.; Schmidt, Jorn O.; Fulton, Elizabeth A.; Bastardie, Francois; Punt, Andre E.; Allen, Icarus; Bartelings, Heleen; Bertignac, Michel; Bethke, Eckhard; Bossier, Sieme; Buckworth, Rik; Carpenter, Griffin; Christensen, Asbjorn; Christensen, Villy; Da-rocha, Jose M.; Deng, Roy; Dichmont, Catherine; Doering, Ralf; Esteban, Aniol; Fernandes, Jose A.; Frost, Hans; Garcia, Dorleta; Gasche, Loic; Gascuel, Didier; Gourguet, Sophie; Groeneveld, Rolf A.; Guillen, Jordi; Guyader, Olivier; Hamon, Katell; Hoff, Ayoe; Horbowy, Jan; Hutton, Trevor; Lehuta, Sigrid; Little, L. Richard; Lleonart, Jordi; Macher, Claire; Mackinson, Steven; Mahevas, Stephanie; Marchal, Paul; Mato-amboage, Rosa; Mapstone, Bruce; Maynou, Francesc; Merzereaud, Mathieu; Palacz, Artur; Pascoe, Sean; Paulrud, Anton; Plaganyi, Eva; Prellezo, Raul; Van Putten, Elizabeth I.; Quaas, Martin; Ravn-jonsen, Lars; Sanchez, Sonia; Simons, Sarah; Thebaud, Olivier; Tomczak, Maciej T.; Ulrich, Clara; Van Dijk, Diana; Vermard, Youen; Voss, Rudi; Waldo, Staffan.
Marine ecosystems evolve under many interconnected and area-specific pressures. To fulfil society's intensifying and diversifying needs while ensuring ecologically sustainable development, more effective marine spatial planning and broader-scope management of marine resources is necessary. Integrated ecological–economic fisheries models (IEEFMs) of marine systems are needed to evaluate impacts and sustainability of potential management actions and understand, and anticipate ecological, economic and social dynamics at a range of scales from local to national and regional. To make these models most effective, it is important to determine how model characteristics and methods of communicating results influence the model implementation, the nature of the...
Tipo: Text
Palavras-chave: Bio-economic models; Comparative model evaluation; Fisheries management advice; Integrated ecological-economic fisheries models; Marine spatial planning and cross-sector management; Performance criteria and scales and risks; Use and acceptance and implementation and communication and flexibility and complexity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00391/50269/50898.pdf

First results from a pilot survey of recreational fishing in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herfaut, Johanna; Levrel, Harold; Thebaud, Olivier; Tranger, Hervé; Berthou, Patrick; Dintheer, Christian; Guyader, Olivier; Morizur, Yvon.
Between 2006 and 2008, Ifremer, in collaboration with the polling institute BVA, implemented a pilot survey of french recreational fisheries. The aim of the survey was to assess the overall population involved in this activity, taking into account the diversity of recreational fishing practices, from fish and shellfish gathering on the seashore to angling and spearfishing. The study was designed to provide first estimates of fishing effort, catches and landings, and economic impacts of recreational fishing. The protocol implemented was two-step. First, a telephone survey of french households, based on a sampling frame of the entire french population of people aged 15+, was carried out to assess the population of fishers and give a first general view of the...
Tipo: Text
Palavras-chave: Recreational fishing; Survey methodology; Catch and effort assessment; Economic impact.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00502/61368/64984.pdf

Une évaluation des performances économiques de la pêche côtière : le cas de la région Bretagne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Floc H, Pascal; Thebaud, Olivier; Boncoeur, Jean; Daures, Fabienne; Guyader, Olivier.
Fishing activities have a significant role in socio-economic base for a few coastal areas. In this respect, fleets operating mainly in coastal fisheries deserve a special interest due to their narrow links with the home base. However, coastal fleet activities are not very known, restricting the capacity to deliver a diagnosis on their economic viability. This article suggests an assessment of the influence and the economic performance of the coastal fleets in Brittany. Results show similar economic performances for coastal units compared to offshore units. Furthermore, coastal units own additional advantages in relation to their energy consumption and capacity to operate without public subsidies. However, there are vulnerable to fishing effort of offshore...
Tipo: Text
Palavras-chave: Pêche côtière; Performance économique; Dépendance énergétique; Mesures de gestion; Coastal fishery; Economic performance; Energy dependency; Management measures.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00243/35421/33958.pdf

Evaluation of the bioeconomic sustainability of multi-species multi-fleet fisheries under a wide range of policy options using ISIS-Fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pelletier, Dominique; Mahevas, Stephanie; Drouineau, Hilaire; Vermard, Youen; Thebaud, Olivier; Guyader, Olivier; Poussind, Benjamin.
In order to provide reliable scientific advice and support for fisheries management, it is necessary to evaluate the biological and economic sustainability of complex fisheries, such as multi-species multi-fleet fisheries. Existing policy-screening modelling tools are not fully suitable in this purpose due to either an over-simplified description of population dynamics, or due to the lack of consideration of economic aspects. In this paper, we present a package that enables quantitative bioeconomic assessment of management scenarios. Population dynamics is described through spatially- and seasonally-explicit models. Exploitation dynamics is characterized by several fishing activities with specific spatial and seasonal features, and practiced by several...
Tipo: Text
Palavras-chave: Policy screening; Natural resource management; Fisheries dynamics; Bioeconomic model; Population dynamics; Complex systems; Simulation tool.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6782.pdf

Towards multidisciplinary indicator dashboards for coral reef fisheries management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Clua, Eric; Beliaeff, Benoit; Chauvet, Claude; David, Gilbert; Ferraris, Jocelyne; Kronen, Mekhi; Kulbicki, Michel; Labrosse, Pierre; Letourneur, Yves; Pelletier, Dominique; Thebaud, Olivier; Leopold, Marc.
The diversity of reef ecosystems, the multiplicity of reef resource uses and the breadth of the range of the island socio-cultural contexts concerned make coral reef fisheries (CRF) management in the South Pacific a complex task. The health and state of the targeted resources depend both on ecosystem characteristics (as determined by ecological and biological factors) and on fishing pressure, whose effects are only partly known. Increasing harvests from commercial and recreational fishing increasingly overlap with traditional Subsistence activity, creating an important CRF management challenge. This paper presents a new approach to CRF assessment and monitoring by providing a set of multidisciplinary indicators. The fisheries system is assessed from three...
Tipo: Text
Palavras-chave: Dashboard; Indicators; Co management; Fishing; Coral reefs.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/2005/publication-716.pdf

Evidence of package trading in a mature multi-species ITQ market
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Innes, James; Thebaud, Olivier; Norman-lopez, Ana; Little, L. Richard; Kung, John.
In multi-species fisheries managed under ITQs, the existence of joint production may lead to complex catch-quota balancing issues. Previous modelling and experimental research suggest that, in such fisheries, some fishers may benefit from the ability to trade packages of fishing quotas, rather than fulfil their quota needs by simultaneously bidding on separate single-species quota markets. This note presents evidence of naturally occurring package trades in a real fishery. Based on this evidence, we suggest that further empirical and modelling research is required on the potential and limitations of package quota trading in mixed fisheries managed with ITQs.
Tipo: Text
Palavras-chave: ITQs; Mixed fisheries; Package trading; Joint production; Great Barrier Reef.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00173/28470/32144.pdf

Les récifs artificiels - Etat des connaissances et recommandations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gerard, Andre; Thouard, Emmanuel; Veron, Gerard; Denis, Jacques; Thebaud, Olivier.
The "Artificial reefs" and "Repopulating" issues have been tackled by the Ifremer for a number of years without reaching a clear cut point of view, mainly for lack of socio-economic elements necessary to a rigorous analysis of these devices and practices. During a mission in Japan in January 2006, some Japanese experts, have presented to the head of the Ifremer a few examples of realisations related to these fields and conducted in their country. The head of the Ifremer realised the scope of such devices in Japan and expressed the wish to see an in-depth study carried out over there. In this purpose, the International Relationship Department organised and co-financed the three-month stay in Japan of a student from the University of Montpellier III, Sylvain...
Tipo: Text
Palavras-chave: France; Etranger; Recommandations; Réglementation; Cadre juridique; Protection; Aménagement; Intérêt; Ecosystème; Récifs artificiels.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-6533.pdf

Données économiques maritimes francaises 2003
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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...
Tipo: Text
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00083/19400/16993.pdf

Designing indicators for assessing the effects of marine protected areas on coral reef ecosystems: A multidisciplinary standpoint
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

French marine - related economic data, 2003
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Kalaydjian, Regis; Bihet, Guillaume; Daures, Fabienne; Girard, Sophie; Guyader, Olivier; Perez Agundez, José A.; Thebaud, Olivier.
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...
Tipo: Text
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00117/22855/20667.pdf

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
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

L'approche écosystémique des pêches : quelles priorités pour la recherche ?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fromentin, Jean-marc; Planque, Benjamin; Thebaud, Olivier.
This document discusses the possible evolutions of IFREMER's research activities in support of the ecosystem-based approach to fisheries management (EAF). It results from an investigation undertaken within the programme "Ecosystem approach to the management of fish resources" (DÉMarche écOSysTÉMique pour une gestion des Ressources Halieutiques").  The first part of the document presents the background to the development of the EAF, particularly the increasing number of reports of resource over-exploitation, the issue of sustainability of exploitation systems, the diversification of uses of marine resources, the key role of governance and the degradation of the state of the ecosystems.  The second part aims at synthesizing the challenges faced by research...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-2567.pdf

Providing Integrated Total Catch Advice for the Management of Mixed Fisheries with an Eco-viability Approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Briton, Florence; Macher, Claire; Merzereaud, Mathieu; Legrand, Christelle; Fifas, Spyros; Thebaud, Olivier.
Well-established single-species approaches are not adapted to the management of mixed fisheries where multiple species are simultaneously caught in unselective fishing operations. In particular, ignoring joint production when setting total allowable catches (TACs) for individual species is likely to lead to over-quota discards or, when discards are not allowed, to lost fishing opportunities. Furthermore, economic and social objectives have been poorly addressed in the design of fisheries harvest strategies, despite being an explicit objective of ecosystem-based fisheries management in many jurisdictions worldwide. We introduce the notion of operating space as the ensemble of reachable, single-species fishing mortality targets, given joint production in a...
Tipo: Text
Palavras-chave: Eco-viability; Mixed fisheries management; Bio-economic modelling; Integrated TAC advice.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00624/73614/73030.pdf

Quel avenir pour la pêche bretonne ?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boncoeur, Jean; Berthou, Patrick; Boude, Jean-pierre; Curtil, Olivier; Daures, Fabienne; Guyader, Olivier; Le Floc'H, Pascal; Thebaud, Olivier.
The identikit of Breton fishing in 2004 can be drafted through a few figures: 1,537 vessels in activity, 315,000 kW of nominal engine power, 7,053 sailors on board, 302,000 tonnes of catches (not including algae), about 466 million euros in profit. However, this global data does not take into account an essential characteristic of this activity: its great diversity. This latter can be declined based on different criteria. The most immediate criterion, that of the size of the vessels, is strongly correlated to that of the location of the activity. The class of the "less than 12 metres", the more numerous with a little more than a thousand vessels, exercises most of its activity on the coast (12 miles off the base lines).  With about 260 vessels, the "12 to...
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-6345.pdf

Simulating bio-economic management scenarios for the sea bass (Dicentrachus labrax) fishery in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Drouot, Bruno; Thebaud, Olivier; Ramat, Eric; Morizur, Yvon; Boude, Jean-pierre.
The fishery for common sea bass (Dicentrarchus labrax) is the fourth most important French metropolitan fishery in value terms, with approximately 5 500 tons landed, and a total turnover of about 52 million euro in 2006. Given its high market value, sea bass is targeted by a range of métiers, resulting in interactions between a large number of fleets. The annual contributions to catches and landings of each of these fleets are highly variable, as are their level of economic dependence towards the species. Sea bass is also an emblematic species for recreational fishermen. Currently, there is no limitation on total allowable catch in this fishery, nor are catch allocations specified at the individual vessel level. The fishery thus faces the traditional...
Tipo: Text
Palavras-chave: Bio-economic modeling; Sea-bass fisheries; Management scenarios.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00634/74590/74485.pdf

Evaluation des conséquences sociales et économiques de différents scenarii de mesures de gestion du stock de sole dans le golfe de Gascogne.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Biseau, Alain; Gourguet, Sophie; Lavialle, Gael; Le Grand, Christelle; Leonardi, Sophie; Merzereaud, Mathieu; Thebaud, Olivier.
Dans sa saisine 14-7048 en date du 02 juillet 2014, la Direction des Pêches Maritimes et de l’Aquaculture (DPMA) expose la possibilité pour la pêcherie de sole (Solea solea) du golfe de Gascogne (Zones CIEM VIIIab) d’atteindre les objectifs de gestion fixés par la Politique Commune de la Pêche (PCP) entre 2015 et 2020. L’objectif de la saisine est d’analyser les impacts socioéconomiques des mesures de gestion qui pourraient être imposées pour atteindre le rendement maximum durable fixé par la PCP, notamment la fixation de Totaux Admissibles de Captures (TAC) constants et contraignants pour les professionnels.  La DPMA sollicite l’expertise de l’Ifremer pour réaliser les travaux suivants :  1. Un bilan de l’importance économique et sociale du stock de sole...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00228/33958/32292.pdf

Ecological-economic modelling for the sustainable management of biodiversity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doyen, Luc; Cisse, Abdoul; Gourguet, Sophie; Mouysset, L.; Hardy, Pierre-yves; Bene, Christophe; Blanchard, Fabian; Jiguet, Frederic; Pereau, J.-c.; Thebaud, Olivier.
Terrestrial and marine biodiversity provides the basis for both ecosystems functioning and numerous commodities or services that underpin human well-being. From several decades, alarming trends have been reported worldwide for both biodiversity and ecosystem services. Therefore the sustainable management of biodiversity requires a double viewpoint balancing ecological conservation with the welfare of human societies. Understanding the underlying trade-offs, synergies and interactions imposes the development of interdisciplinary researches and methods. In that respect, bio-economic or ecological economic modeling is likely to play a major role. The present paper intends to elicit the key features, strengths and challenges of bio-economic approaches...
Tipo: Text
Palavras-chave: Ecological economics; Modeling; Sustainability; Biodiversity; Public policy; Criterion; Equilibrium; Optimality; Viability.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00171/28208/26510.pdf

Ecoviability for ecosystem-based fisheries management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doyen, Luc; Bene, Christophe; Bertignac, Michel; Blanchard, Fabian; Cisse, Abdoul; Dichmont, Catherine; Gourguet, Sophie; Guyader, Olivier; Hardy, Pierre-yves; Jennings, Sarah; Little, Lorne Richard; Macher, Claire; Mills, David Jonathan; Noussair, Ahmed; Pascoe, Sean; Pereau, Jean-christophe; Sanz, Nicolas; Schwarz, Anne-maree; Smith, Tony; Thebaud, Olivier.
Reconciling food security, economic development and biodiversity conservation is a key challenge, especially in the face of the demographic transition characterizing many countries in the world. Fisheries and marine ecosystems constitute a difficult application of this bio-economic challenge. Many experts and scientists advocate an ecosystem approach to manage marine socio-ecosystems for their sustainability and resilience. However, the ways by which to operationalize ecosystem-based fisheries management (EBFM) remain poorly specified. We propose a specific methodological framework-viability modelling-to do so. We show how viability modelling can be applied using four contrasted case-studies: two small-scale fisheries in South America and Pacific and two...
Tipo: Text
Palavras-chave: Biodiversity; Ecological economics; Ecosystem approach; Fisheries; Scenario; Viability.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00409/52009/52724.pdf

Evaluation et indemnisation des dommages causés par les marées noires - Rapport de mission au FIPOL (Londres) et au CEMARE (Université de Portsmouth)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebaud, Olivier; Hay, Julien.
Le SEM conduit actuellement, en collaboration avec le Centre de Droit et d'Economie de la Mer de l'Université de Bretagne Occidentale, un projet de recherche intitulé "Les pollutions marines accidentelles: évaluations économiques et mécanismes incitatifs de prévention". Ce projet bénéficie d'un financement dans le cadre du Programme National d'Environnement Côtier français, et d'une bourse de thèse de la région Bretagne. L'une des tâches de cette recherche consiste en une analyse rétrospective de la pratique de l'évaluation et de l'indemnisation des dommages suite à des cas passés de marées noires. Une attention particulière est consacrée aux cas entrant dans le cadre du FIPOL, avec un intérêt spécifique pour les pollutions causées par trois accidents...
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00305/41645/40854.pdf

Bioeconomic model of the dynamics of fisheries facing global economic and environment changes: the French Guyana shrimp fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

A stochastic viability approach to ecosystem-based fisheries management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Structure et évolution du marché et des prix d'occasion
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyader, Olivier; Jezequel, Michele; Daures, Fabienne; Thebaud, Olivier.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00243/35409/33934.pdf

Données économiques maritimes française. 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00117/22850/20660.pdf

Externalities, institutions and the location choices of shellfish producers: the case of blue mussel farming in the Mont-Saint-Michel Bay (France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mongruel, Remi; Thebaud, Olivier.
Most marine aquaculture activities remain strongly dependent on coastal ecosystems. In the case of shellfish farming, this dependency is related mainly to water quality and to the various ecological interactions resulting from the dynamics of coastal food webs. Such ecological constraints have influenced the overall evolution of blue mussel farming in the Mont-Saint-Michel Bay, leading producers to negotiate collective arrangements regarding production capacity and techniques and to develop production strategies at the farm level. This article presents an analysis of the location choices of mussel farmers in the Mont-Saint-Michel Bay based on an empirical investigation conducted in 2002. A typology of farms with respect to their land structure is developed...
Tipo: Text
Palavras-chave: Institutional arrangements; Location choices; Externalities; Economic performance indicators; Blue mussel farming.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/2006/publication-6346.pdf

Predicting fisher response to competition for space and resources in a mixed demersal fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Girardin, Raphael; Vermard, Youen; Thebaud, Olivier; Tidd, Alex; Marchal, Paul.
Understanding and modelling fleet dynamics and their response to spatial constraints is a prerequisite to anticipating the performance of marine ecosystem management plans. A major challenge for fisheries managers is to be able to anticipate how fishing effort is re-allocated following any permanent or seasonal closure of fishing grounds, given the competition for space with other active maritime sectors. In this study, a Random Utility Model (RUM) was applied to determine how fishing effort is allocated spatially and temporally by the French demersal mixed fleet fishing in the Eastern English Channel. The explanatory variables chosen were past effort i.e. experience or habit, previous catch to represent previous success, % of area occupied by spatial...
Tipo: Text
Palavras-chave: Effort allocation; Random Utility Model; Spatial competition; Demersal mixed fishery; Eastern English Channel; Spatial management.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00250/36153/37312.pdf

Strategic research priorities to the Common fishery policy (CFP) with regard to global commitments (MSY, EAF, MFSD)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gros, Philippe; Biseau, Alain; Fromentin, Jean-marc; Thebaud, Olivier.
The report is focused on the research priorities pertaining to the implementation of the ‘maximum sustainable yield’ (MSY) and of the ‘ecosystem approach to fisheries’ (EAF). The MSY is first examined, taking account of its relevance as a management objective, of its link with maximum economic yield (MEY), and of its close relationship with ecosystem productivity and fishing capacity. Related research priorities are identified. In the second part, emphasis is put on EAF, a very challenge for fishery scientists. The extension of fisheries science towards an ecosystem dimension (including human activities) and the integration of uncertainty have opened up large fields of research. Priorities are presented by domain. Five principal areas of knowledge and...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00013/12408/9194.pdf

Scénarios d'aménagment des activités de pêche dans la bande cotière bretonne, rapport 2005
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Berthou, Patrick; Boncoeur, J.; Boude, Jp; Mettouchi, M.; Le Gallic, B.; Thebaud, Olivier.
This document is the joint activity report of IFREMER, CEDEM (University of Western Brittany) and Agrocampus-Rennes for the fifth year of the interdisciplinary research programme "Scenarios for Development of Fishing Activities in the Breton Coastal Strip", co-financed by the Brittany region within the framework of the XII State/Regional Planning Contract. It is made up of two parts: - the return of the international workshop on regulating access to living marine resources, - a summary on the management of Breton coastal fisheries by licensing systems.
Tipo: Text
Palavras-chave: Fleets; Aquaculture; Fishiung licence; Breton fisheries; Fishing assessment; Brittany; CPER; Flottilles; Aquaculture; Licence de pêche; Droits de pêche; Pêcheries bretonnes; Gestion de la peche; Bretagne.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2264.pdf

Conséquences du changement climatique sur les écosystèmes marins exploités par la pêche et la conchyliculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Petitgas, Pierre; Ulrich, Clara; Auber, Arnaud; Gourguet, Sophie; Huret, Martin; Mazurais, David; Pernet, Fabrice; Pouvreau, Stephane; Richard, Marion; Servili, Arianna; Thebaud, Olivier; Zambonino Infante, Jose-luis.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00657/76942/78148.pdf

The nationwide assessment of marine recreational fishing: A French example
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Herfaut, Johanna; Levrel, Harold; Thebaud, Olivier; Veron, Gerard.
In 2006, IFREMER, with the help of the polling institute BVA, implemented a national pilot study of recreational fishing. Taking into account all the different fishing methods, from shellfish gathering to offshore angling, including spear-fishing, this study was designed to provide estimates of (i) the number of recreational fishers in France, (ii) recreational fishing effort; (iii) catches and landings; (iv) the economic impacts of recreational fishing, and to develop a classification of recreational fishers. A two-part method was adopted: a random-digit-dialing (ROD) survey combined with an on-site survey. The data collected from telephone and on-site surveys were compared and then used in combination to provide a reliable estimate of this growing...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00144/25498/24101.pdf

Effets de la pêche et du réchauffement climatique sur la coexistence spatiale des espèces de poissons du golfe de Gascogne. Conséquences pour les pêcheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchard, Fabian; Thebaud, Olivier; Guyader, Olivier; Lorance, Pascal; Boucher, Jean; Chevaillier, Pierre.
The populations of fishes dwelling near the sea bed (demersal species) on the continental shelf are usually the object of  intense commercial exploitation. The Bay of Biscay shelf is no exception. Hence, populations suffer from this exploitation. Moreover, the general role played by hydro-climatic variations in the regulation of the abundance of demersal fish populations (population dynamics) is traditionally admitted. In the Bay of Biscay, a warming of the surface water has been observed over the three last decades (Koutsikopoulos et al., 1998). Climate change therefore has potential consequences on fish communities. Thus, the structure and dynamics of fish populations on the continental shelf of the Bay of Biscay are susceptible to suffer both from the...
Tipo: Text
Palavras-chave: Modèles individus centrés; Conséquences économiques; Réchauffement climatique; Impact de la pêche; Communautés de poissons.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-6347.pdf

Defining viable recovery paths toward sustainable fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Of sets of offsets: Cumulative impacts and strategies for compensatory restoration
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebaud, Olivier; Boschetti, Fabio; Jennings, Sarah; Smith, Anthony D.m.; Pascoe, Sean.
Biodiversity offsets are increasingly advocated as a flexible approach to managing the ecological costs of economic development. Arguably, however, this remains an area where policy-making has run ahead of science. A growing number of studies identify limitations of offsets in achieving ecologically sustainable outcomes, pointing to ethical and implementation issues that may undermine their effectiveness. We develop a novel system dynamic modelling framework to analyze the no net loss objective of development and biodiversity offsets. The modelling framework considers a marine-based example, where resource abundance depends on a habitat that is affected by a sequence of development projects, and biodiversity offsets are understood as habitat restoration...
Tipo: Text
Palavras-chave: Biodiversity offsets; Compensatory restoration; Cumulative impacts; Habitat-resource interactions; Bio-economic modelling; Social acceptability.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38156/36312.pdf

Non-market use and non-use values for preserving ecosystem services over time: A choice experiment application to coral reef ecosystems in New Caledonia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marre, Jean-baptiste; Brander, Luke; Thebaud, Olivier; Boncoeur, Jean; Pascoe, Sean; Coglan, Louisa; Pascal, Nicolas.
Non-use values (i.e. economic values assigned by individuals to ecosystem goods and services unrelated to current or future uses) provide one of the most compelling incentives for the preservation of ecosystems and biodiversity. Assessing the non-use values of non-users is relatively straightforward using stated preference methods, but the standard approaches for estimating non-use values of users (stated decomposition) have substantial shortcomings which undermine the robustness of their results. In this paper, we propose a pragmatic interpretation of non-use values to derive estimates that capture their main dimensions, based on the identification of a willingness to pay for ecosystem protection beyond one's expected life. We empirically test our...
Tipo: Text
Palavras-chave: Discrete choice experiment; Ecosystem services valuation; Non-use values; Time decay; Willingness to pay.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00244/35564/35398.pdf

Micro-economic drivers of profitability in an ITQ-managed fishery: An analysis of the Queensland Coral Reef Fin-Fish Fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebaud, Olivier; Innes, James; Norman-lopez, Ana; Slade, Stephanie; Cameron, Darren; Cannard, Toni; Tickell, Sharon; Kung, John; Kerrigan, Brigid; Williams, Lew; Little, L. Richard.
An economic survey of the commercial operators currently active in the Queensland Coral Reef Fin-Fish Fishery has been carried out, as part of a research project aimed at evaluating alternative management options for this fishery. This paper presents the background analysis used as a basis to develop the sampling design for this survey. The background analysis focuses on activity patterns of the fleet based on effort and catch information, as well as patterns of quota ownership. Based on this information, a fishing business profile describing the micro-economic structure of fishing operations is developed. This profile, in conjunction with the qualitative information gained in undertaking the economic surveys, allows preliminary understanding of the key...
Tipo: Text
Palavras-chave: Commercial fishing; Queensland Coral Reef Fin-Fish Fishery; Great Barrier Reef; Business structures; ITQs; Diversification.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00250/36166/34749.pdf

Individual transferable quota contribution to environmental stewardship: a theory in need of validation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Van Putten, Ingrid; Boschetti, Fabio; Fulton, Elizabeth A.; Smith, Anthony D.m.; Thebaud, Olivier.
We explored the extent to which (1) individual transferable quotas (ITQs) may lead to changes in environmental stewardship and (2) environmental stewardship may in turn contribute to explain the success or otherwise of ITQs in meeting sustainability objectives. ITQs are an example of incentive-based fisheries management in which fishing rights can be privately owned and traded. ITQs are aimed at resolving the problems created by open-access fisheries. ITQs were proposed to promote economic efficiency, and there is growing empirical evidence that ITQs meet a number of economic and social fisheries management objectives. Even though improved stock status arises as a consequence of the total allowable catch levels implemented together with ITQs, the effect is...
Tipo: Text
Palavras-chave: Comanagement; Environmental ethics; Fisheries management; Fishing rights; Stewardship.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00250/36165/34720.pdf

A comparative review of the fisheries resource management systems in New Zealand and in the European Union
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Adaptive behaviour of fishers to external perturbations: simulation of the Tasmanian rock lobster fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Modeling catch-quota management in a multi-species fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebaud, Olivier; Gourguet, Sophie; Lelong, Pierre; Doyen, Luc; Little, Rich; Smith, Tony; Pascoe, Sean.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00302/41295/40462.pdf

Quota allocation in mixed fisheries: a bioeconomic modelling approach applied to the Channel flatfish fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marchal, Paul; Little, L. Richard; Thebaud, Olivier.
A simulation modelling approach is used to assess the respective performances of different regimes of quota allocation (fixed or transferable), quota ownership (owned or not by fishers), and taxation for catching fish above quota. The simulations account for a variety of fleet behaviours (ranging from fixed by tradition to dynamic economics-driven). The modelling framework is applied to the Channel flatfish mixed fisheries. Transferable quota allocation regimes would particularly benefit small netters and beam trawlers, which would achieve a profit of (sic)50-150 million without compromising the conservation of eastern Channel sole, but it could impair the sustainability of other stocks. If quota is owned by fishers, the least fishing-efficient fleet stops...
Tipo: Text
Palavras-chave: Channel flatfish mixed fisheries; Fisheries management; Fleet dynamics; Individual quotas; Overquota landing tax; Plaice (Pleuronectes platessa); Sole (Solea solea).
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00044/15492/12971.pdf

Has the value of global marine and coastal ecosystem services changed?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pendleton, Linwood H.; Thebaud, Olivier; Mongruel, Remi; Levrel, Harold.
In 1997, Robert Costanza and his colleagues published a groundbreaking study [1] that estimated the monetary value of the contribution of the world's ecosystems to human wellbeing. The methods used were cited as preliminary and received considerable criticism [2] and [3]. In two more recent peer-reviewed studies [4] and [5], the authors update the original estimates of ecosystem service value and find: (1) that original per area ecosystem service values were underestimated and (2) using these revised per area values, the total global value of ecosystem services has declined. Just under ninety-five percent of the estimated loss in ecosystem service value comes from revisions by the authors in the value estimates of marine ecosystem services. These revisions...
Tipo: Text
Palavras-chave: Marine ecosystem services; Global value; Aggregate values.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00300/41098/40271.pdf

Multiple management objectives within a mixed prawn fishery : which win-win-win situations?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourguet, Sophie; Thebaud, Olivier; Jennings, Sarah; Little, Rich; Dichmont, Cathy; Pascoe, Sean; Doyen, Luc.
Fisheries management must address multiple, often conflicting objectives in a highly uncertain context. While the bio-economic performance of trawl fisheries faces high levels of biological and economic uncertainty, the impact of trawling on broader biodiversity is also a major concern for their management. The purpose of this study is to propose a model-based framework to formally assess the trade-offs associated with balancing biological, economic and non-target species conservation objectives in a mixed fishery. This framework is applied to the Australian Northern Prawn Fishery (NPF). We apply a stochastic co-viability framework of analysis to a multi-species bio-economic model of the NPF considering multiple management objectives. In particular, we...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00299/41070/40243.pdf

A Quantitative Metric to Identify Critical Elements within Seafood Supply Networks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00250/36163/34722.pdf

Mesure des résultats économiques de la pêche profesionnelle bretonne : Comparaison des méthodes à base de données comptables et d'enquêtes de terrain
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boncoeur, Jean; Daures, Fabienne; Guyader, Olivier; Martin, Annaïck; Le Floc H, Pascal; Thebaud, Olivier.
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00243/35391/33911.pdf

Modeling fleet response in regulated fisheries: An agent-based approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Identification of the main processes underlying ecosystem functioning in the Eastern English Channel, with a focus on flatfish species, as revealed through the application of the Atlantis end-to-end model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Girardin, Raphael; Fulton, Elizabeth A.; Lehuta, Sigrid; Rolland, Marie; Thebaud, Olivier; Travers-trolet, Morgane; Vermard, Youen; Marchal, Paul.
The ecosystem model Atlantis was used to investigate the key dynamics and processes that structure the Eastern English Channel ecosystem, with a particular focus on two commercial flatfish species, sole (Solea solea) and plaice (Pleuronectes platessa). This complex model was parameterized with data collected from diverse sources (a literature review, survey data, as well as landings and stock assessment information) and tuned so both simulated biomass and catch fit 2002–2011 observations. Here, the outputs are mainly presented for the two focus species and for some other vertebrates found to be important in the trophic network. The calibration process revealed the importance of coastal areas in the Eastern English Channel and of nutrient inputs from...
Tipo: Text
Palavras-chave: Ecosystem modelling; Flatfish fisheries; Trophic relationships; Calibration; Atlantis; Eastern English Channel.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00354/46524/46289.pdf

Scénarios d'aménagement des activités de pêche dans la bande cotière bretonne : rapport 2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Talidec, Catherine; Daures, Fabienne; Leblond, Emilie; Berthou, Patrick; Guyader, Olivier; Thebaud, Olivier; Peronnet, Isabelle; Boncoeur, J.; Curtil, O.; Martin, A.; Le Floc'H, P.; Travers, M.; Le Lec, G.
This document is the progress report, for the year 2004, of the research programme "Scenarios for Development of Fishing Activity in the Breton Coastal Strip". This programme, co-financed by the Brittany Region within the framework of the XII State/Regional Planning Contract, teams up scientific partners from IFREMER, ENSAR, and UBO (CEDEM).  This report consists of four parts: 1. Introduction of the Breton fishing fleet, its characteristics, its activity and its recent history 2. Spatial management of fishing economic activity in the Breton coastal strip 3. Measuring of economic results of Breton professional fishing: Comparison of methods based on accounting data and local surveys 4. Assessment of the economic weight of professional fishing: analysis of...
Tipo: Text
Palavras-chave: Allotments; Trawl survey; Database; Spatial assessment; Coastal fishing; Brittany; Cantonnement; Chalutage; Enquêtes; Bases de données; Gestion spatiale; Pêche cotière; Bretagne.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-2263.pdf

Information preferences for the evaluation of coastal development impacts on ecosystem services: A multi-criteria assessment in the Australian context
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marre, Jean-baptiste; Pascoe, Sean; Thebaud, Olivier; Jennings, Sarah; Boncoeur, Jean; Coglan, Louisa.
Ecosystem based management requires the integration of various types of assessment indicators. Understanding stakeholders' information preferences is important, in selecting those indicators that best support management and policy. Both the preferences of decision-makers and the general public may matter, in democratic participatory management institutions. This paper presents a multi-criteria analysis aimed at quantifying the relative importance to these groups of economic, ecological and socio-economic indicators usually considered when managing ecosystem services in a coastal development context. The Analytic Hierarchy Process (AHP) is applied within two nationwide surveys in Australia, and preferences of both the general public and decision-makers for...
Tipo: Text
Palavras-chave: Analytic hierarchy process; Australia; Coastal development; Ecosystem services assessment; Information preferences; Multi-criteria analysis.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00313/42428/41791.pdf

Managing marine socio-ecological systems: picturing the future
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebaud, Olivier; Link, Jason S.; Kohler, Bas; Kraan, Marloes; Lopez, Romain; Poos, Jan Jaap; Schmidt, Joern O.; Smith, David C.
What do you get when a lawyer, a modeller, an economist, a social scientist and an ecologist talk about the ocean? Besides an interesting conversation, it is likely there will be some consideration of how to solve many of the problems facing marine ecosystems around the world. That is precisely what the MSEAS 2016 symposium on understanding marine socio-ecological systems aimed to do. From 30 May to 3 June in Brest, France, the symposium gathered over 230 participants from around the world and from multiple disciplines to discuss the challenge of explicitly considering the human component in producing synoptic assessments of marine social-ecological systems. The symposium fostered dynamic debates on the inter-disciplinary collaborations needed to support...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00407/51818/52410.pdf

Distributional issues in the operation of rights-based fisheries management systems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Les conflits d'usage de l'espace littoral martiniquais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebaud, Olivier.
This report presents, in two parts, the results of a study carried out on the coast of Martinique, during 1993. The first part presents the evolution of perceptions and uses of coastal areas, linked to the socio-economic transformations of the island. Completing this presentation, based on the analysis of management plans from different periods, an overview of the recent state of occupation of coastal areas in Martinique is also given. The second part presents four case studies of conflictual situations concerning access to coastal areas, on l and and at sea, considering differents types of activities and decision-making processes. For each case study, an investigation has been conducted to identify implied actors, their motivations and strategies, as well...
Tipo: Text
Palavras-chave: Regulation; Decision making process; Conflicts; Martinique; Coast; SEM; Réglementation; Processus de décision; Conflits; Martinique; Littoral.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/rapport-2140.pdf

Inclusion of ecological, economic, social, and institutional considerations when setting targets and limits for multispecies fisheries
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rindorf, Anna; Dichmont, Catherine M.; Thorson, James; Charles, Anthony; Clausen, Lotte Worsoe; Degnbol, Poul; Garcia, Dorleta; Hintzen, Niels T.; Kempf, Alexander; Levin, Phillip; Mace, Pamela; Maravelias, Christos; Minto, Coilin; Mumford, John; Pascoe, Sean; Prellezo, Raul; Punt, Andre E.; Reid, David G.; Roeckmann, Christine; Stephenson, Robert L.; Thebaud, Olivier; Tserpes, George; Voss, Ruediger.
Targets and limits for long-term management are used in fisheries advice to operationalize the way management reflects societal priorities on ecological, economic, social and institutional aspects. This study reflects on the available published literature as well as new research presented at the international ICES/Myfish symposium on targets and limits for long term fisheries management. We examine the inclusion of ecological, economic, social and institutional objectives in fisheries management, with the aim of progressing towards including all four objectives when setting management targets or limits, or both, for multispecies fisheries. The topics covered include ecological, economic, social and governance objectives in fisheries management, consistent...
Tipo: Text
Palavras-chave: Ecosystem-based fisheries management; Multiple objectives; Reference points; Sustainability; Variability.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00381/49262/49838.pdf

Evaluation économique et indemnisation des dommages causés par les marées noires : enseignements tirés du cas de l'Amoco Cadiz
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hay, Julien; Thebaud, Olivier.
This article presents an empirical analysis of the process of valuing and compensating damages resulting from oil pollution at sea. Observation of recent accidents shows that arriving at a single global estimate of the social cost of an oil spill proves difficult in most cases. The analysis builds on a historical analysis of the Amoco Cadiz case to show that three types of estima tes can be considered in practice: (i) estima tes by economists involved as experts in the process, (ii) claims by victims, and (iii) compensation eventually granted to the claimants. The main factors explaining divergence between these estimates, and their implications in terms of final payments, are considered. Factors of divergence relate to theoretical and empirical...
Tipo: Text
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00244/35508/34030.pdf

The role of technical protocols and partnership engagement in developing a decision support framework for fisheries management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Macher, Claire; Bertignac, Michel; Guyader, Olivier; Frangoudes, Katia; Fresard, Marjolaine; Le Grand, Christelle; Merzereaud, Mathieu; Thebaud, Olivier.
In the context of the Common Fisheries Policy Reform, the implementation of multiannual management plans for fisheries and the annual quota negotiations between EU member states has generated a growing demand from stakeholders and managers for integrated advice that goes beyond the usual biological advice. This has led to the emergence of bio-economic tools and methods for the comparison of the biological, economic and social tradeoffs associated with alternative options for fisheries management. A Decision Support Framework (DSF) has been developed in this context, with the objective to tackle technical and methodological challenges to be able to provide bio-economic advices to support decision at national and European level. It is based on a partnership...
Tipo: Text
Palavras-chave: Participatory approach; Stakeholder engagement; Decision-support; Bio-economic modelling; Fisheries management; Impact assessment.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00445/55698/57395.pdf

La flotte de pêche bretonne, ses caractéristiques, son activité et son évolution récente : synthèse
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Daures, Fabienne; Talidec, Catherine; Berthou, Patrick; Leblond, Emilie; Guyader, Olivier; Thebaud, Olivier.
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00243/35390/33909.pdf

Risk versus economic performance in a mixed fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourguet, Sophie; Thebaud, Olivier; Dichmont, C.; Jennings, S.; Little, L. R.; Pascoe, S.; Deng, R. A.; Doyen, L.
Balancing bio-economic risks and high profit expectations is often a major concern in fisheries management. We examine this trade-off in the context of the Australian Northern Prawn Fishery (NPF). The fishery derives its revenue from different prawn species with different dynamics and recruitment processes. A multi-species bio-economic and stochastic model is used to examine the trade-offs between mean profitability of the fishery and its variance, under a range of economic scenarios, fishing capacities and distributions of fishing effort across the various sub-fisheries that comprise the NPF. Simulation results show that the current fishing strategy diversifying catch across sub-components of the fishery entails a compromise between expected performance...
Tipo: Text
Palavras-chave: Bio-economic modelling; Uncertainty; Risk-performance trade-offs; Fishing strategy; Northern Prawn Fishery.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00216/32775/31320.pdf

Modelling the emergence of resource-sharing conventions: an agent-based approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebaud, Olivier; Locatelli, Bruno.
This paper presents an agent-based simulation framework for the analysis of the emergence of resource-sharing conventions. The model is based on Sugden's article entitled "Spontaneous order", which looks at the conditions under which conventions regarding access to a natural resource become established. The aim of the model is to explore the potential of agent-based modelling for the analysis of these questions. First, the structure of a simulation model based on the example of driftwood collection used by Sugden is presented. Second, simulations of various scenarios about the behavioural rules followed by agents are described, and simulation results are presented. The paper concludes with a brief discussion of the advantages of agent-based models for...
Tipo: Text
Palavras-chave: Conventions; Natural resources; Multi-agent systems.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00244/35509/34015.pdf

Changement global, dynamique de la biodiversité marine exploitée et viabilité des pêcheries (Rapport final du projet CHALOUPE)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Blanchard, Fabian; Thebaud, Olivier.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00076/18686/16236.pdf

Analyse de l'impact économique de la mise en place de l'obligation de débarquement pour les chalutiers de fond : amélioration de la sélectivité, traitement des captures indésirées.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Macher, Claire; Arnaud, Brice; Merzereaud, Mathieu; Le Grand, Christelle; Guyader, Olivier; Thebaud, Olivier; Biseau, Alain.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00280/39149/40182.pdf

The influence of fiscal regulations on investment in marine fisheries: A French case study
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Floc'H, Pascal; Daures, Fabienne; Nourry, Myriam; Thebaud, Olivier; Travers, Muriel; Van Iseghem, Sylvie.
Analysing investment drivers in fisheries is essential in understanding the long-term development of fishing capacity. This paper addresses the drivers of investment in the French commercial fishing fleets operating along the Atlantic coast, and the role of public policies have had on investment. First, we examine the changes in the capital value of the fleet, which was strongly impacted by decommissioning schemes during the nineties. We then examine drivers of investment using an unbalanced panel data set describing the investment decisions of a sample of firms over the period 1994-2004. In addition to economic variables, the estimated models account for other factors that may have an impact on investment behaviour, including the different career phases...
Tipo: Text
Palavras-chave: Fishery; Capital; Fiscal regime.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00037/14803/12236.pdf

A typology of fisheries management tools
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00243/35400/33920.pdf

Données économiques maritimes françaises 2005
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

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
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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.
Tipo: Text
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00080/19078/16673.pdf

Investment Behaviour and Capacity Adjustment in Fisheries: A Survey of the Literature
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nostbakken, Linda; Thebaud, Olivier; Sorensen, Lars-christian.
This article provides a survey of the economic literature on investment behaviour and capacity adjustment in fisheries. An overview of the existing theoretical and the empirical work is provided, and areas that require more work are pointed out. The survey shows that while a large body of theoretical work has been developed on the issue of capital adjustment in fisheries, relatively less attention has been granted to the theory of investment, where this becomes a separate decision to the decision about capital levels: i.e., where capital is quasi-malleable. In addition, empirical studies have been fairly limited, and more work is still needed to analyse and further investigate these issues in practical situations. There is particularly a need for more...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00040/15111/13391.pdf

Managing mixed fisheries for bio-economic viability
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourguet, Sophie; Macher, Claire; Doyen, Luc; Thebaud, Olivier; Bertignac, Michel; Guyader, Olivier.
Management of fisheries for sustainability requires dealing with multiple and often conflicting objectives. A stochastic viability approach is proposed to address the trade-offs associated with balancing ecological, economic and social objectives in regulating mixed fisheries, taking into account the complexity and uncertainty of the dynamic interactions which characterize such fisheries. We focus on the demersal fishery in the Bay of Biscay and more specifically on the fleets harvesting Norway Lobster (Nephrops norvegicus), Hake (Merluccius merluccius) and Sole (Solea solea). A bio-economic multi-species and multi-fleet model with technical interactions is developed to examine the trade-offs between preserving Spawning Stock Biomass (SSB) of every species...
Tipo: Text
Palavras-chave: Bay of Biscay; Bio-economic model; Co-viability; Fisheries; Uncertainty.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00129/23999/22052.pdf

A retrospective analysis of the effects of adopting individual transferable quotas in the Tasmanian red rock lobster, Jasus edwardsii, fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Fish, fishers, seals and tourists: Economic consequences of creating a marine reserve in a multi-species, multi-activity context
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boncoeur, Jean; Alban, Frederique; Guyader, Olivier; Thebaud, Olivier.
This paper investigates some economic consequences of creating a marine reserve on both fishing and ecotourism, when the range of controllability of fishing effort is limited and the impact of the reserve on ecosystem is considered. The issue is illustrated by the example of creating a no-take zone in part of a region where fishing is managed through a limited entry license system, and which is inhabited by two interacting stocks: a stock of prey (fish) and a stock of predators (seals). While the former is targeted by commercial fishing, the latter is not subject to harvest but is a potential basis for a commercial non-extractive activity (seal watching). Analysis is conducted with the help of a bioeconomic model combining the features of marine reserve...
Tipo: Text
Palavras-chave: Marine protected areas; Multispecies interactions; Ecotourism; Bioeconomic modeling.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/00244/35506/34010.pdf

Incidences des épisodes d'efflorescences de micro algues toxiques sur les écosystèmes et sur les pêcheries de coquillages en baie de Douarnenez
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebaud, Olivier; Veron, Gerard; Fifas, Spyros.
The commercial fishery for wedge clam, or telline (Donax trunculus) in the bay of Douarnenez in France started in the early 1980ies. During twenty years, the activity has developed, from an opportunistic fishery, into a regular fishing enterprise for 36 fishermen, who derive from it most, if not all, of their revenue. The fishery is nowadays strictly regulated. It is subject to natural variations in the productivity of clam stocks, in relation with meteorological conditions which can strongly affect the stocks.  The bay of Douarnenez has been experiencing regular blooms of harmful algae, both of species leading to shellfish poisoning for human consumption, such as Dinophysis (Diarrhoeic Shellfish Poisoning) and Pseudo-nitzschia (Amnesic Shellfish...
Tipo: Text
Palavras-chave: Temporary fishing ban; Mortality; Economic impact; Fishery; Wedge clam; Donax trunculus; Fermeture temporaire; Mortalité; Impact; Pêcherie; Telline; Donax trunculus.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-1262.pdf

Scénarios d'aménagement des activités de pêche dans la bande cotière bretonne, rapport 2002
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Talidec, Catherine; Berthou, Patrick; Peronnet, Isabelle; Guyader, Olivier; Daures, Fabienne; Thebaud, Olivier; Leblond, Emilie; Bermell, Sylvain.
This 2002 report is the progress report of a study co-financed by the Brittany region and IFREMER within the framework of the XII State-Regional Planning Contract. It follows the 2001 report, which contains a comprehensive description of the Breton fleet in 2000, i.e., all occupations included, as well as its evolution since 1983. The work carried out in 2002 focused on mapping the fishing zones frequented by Brittany's ships as well as on analysing fishing strategies.
Tipo: Text
Palavras-chave: Fishing gear; Regional development; Cartography; Fleet; Breton fisheries; Brittany; Cartographie; CPER 2002; Peche bretonne; Flotte; Casier; Ligne; Drague; Palangre; Filet; Chalut.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/rapport-2259.pdf

Marché des navires d'occasion et coût d'accès à la ressource : application à la Bretagne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guyader, Olivier; Berthou, Patrick; Daures, Fabienne; Jezequel, Michele; Thebaud, Olivier.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00243/35408/33931.pdf

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
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

The use of ecosystem services valuation in Australian coastal zone management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marre, Jean-baptiste; Thebaud, Olivier; Pascoe, Sean; Jennings, Sarah; Boncoeur, Jean; Coglan, Louisa.
The use and influence of ecosystem services valuation in management decision-making, particularly as it relates to coastal zone management, remains largely unexplored in the academic literature. A recent Australia-wide survey of decision-makers involved in coastal zone management examined if, how and to what extent economic valuation of coastal and marine ecosystem services is used in, and influences, decision-making in Australia. The survey also identified a set of cases where economic valuation of ecosystem services was used for decision-making, and reasons why economic values may or may not be considered in the decision-making process. This paper details the method and results from this survey. Overall, there is strong empirical evidence that economic...
Tipo: Text
Palavras-chave: Coastal zone management; Decision-making; Ecosystem services; Economic valuation.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00257/36812/42022.pdf

Thirty years of fleet dynamics modelling using discrete-choice models: What have we learned?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Girardin, Raphael; Hamon, Katell; Pinnegar, John; Poos, Jan Jaap; Thebaud, Olivier; Tidd, Alex; Vermard, Youen; Marchal, Paul.
Anticipating fisher behaviour is necessary for successful fisheries management. Of the different concepts that have been developed to understand individual fisher behaviour, random utility models (RUMs) have attracted considerable attention in the past three decades, and more particularly so since the 2000s. This study aimed at summarizing and analysing the information gathered from RUMs used during the last three decades around the globe. A methodology has been developed to standardize information across different studies and compare RUM results. The studies selected focused on fishing effort allocation. Six types of fisher behaviour drivers were considered: the presence of other vessels in the same fishing area, tradition, expected revenue, species...
Tipo: Text
Palavras-chave: Fisher behaviour; Meta-analysis; Random utility model.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00357/46834/47127.pdf

The Cost of Co-viability in the Australian Northern Prawn Fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourguet, Sophie; Thebaud, Olivier; Jennings, Sarah; Little, L. Richard; Dichmont, Catherine M.; Pascoe, Sean; Deng, Roy A.; Doyen, Luc.
Fisheries management must address multiple, often conflicting objectives in a highly uncertain context. In particular, while the bio-economic performance of trawl fisheries is subject to high levels of biological and economic uncertainty, the impact of trawling on broader biodiversity is also a major concern for their management. The purpose of this study is to propose an analytical framework to formally assess the trade-offs associated with balancing biological, economic and non-target species conservation objectives. We use the Australian Northern Prawn Fishery (NPF), which is one of the most valuable federally managed commercial fisheries in Australia, as a case study. We develop a stochastic co-viability assessment of the fishery under multiple...
Tipo: Text
Palavras-chave: Bio-economic modeling; Co-viability cost; Conflicting management objectives; Trawling impacts; Uncertainty; Northern prawn fishery.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00300/41073/40295.pdf

French marine - related economic data, 2001
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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 mineral 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, employment). 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...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00117/22852/20661.pdf

Science, partnership and decision support processes in fisheries: sharing experiences and practices and identifying Lessons learnt from an interdisciplinary perspective
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Macher, Claire; Bailly, Denis; Ballesteros, Marta; Bertignac, Michel; Collocas, Francesco; Fitzpatrick, Mike; Frangoudes, Katia; Garcia, Dorleta; Kraan, Marloes; Little, Rich; Mardle, Simon; Murillas, Arantza; Pawlowski, Lionel; Philippe, Manuelle; Prellezo, Raul; Sabatella, Evelina; Steins, Nathalie; Thebaud, Olivier; Ulrich, Clara.
Implementation of Ecosystem Based Management in fisheries has led to higher integration of knowledge in  advices  and  higher  engagement  of  stakeholders  in  the  decision  support  Process.  As  part  of  the process,  fisheries scientists contribute  in different ways and at different levels to decision support and experienced partnership approaches in the context of research projects or institutional decision support. Role of scientists in  the process is however  not trivial to define and operationalize. Several pitfalls can occur   that   scientists   may   have   experienced   through   partnership   projects   or   in   the   expert assessments done for authorities. A workshop  was organized from 15 to 17 January 2018  as part of  the ScipaDe ...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00463/57452/59561.pdf

Combining fleet dynamics and population dynamics for a volatile fishery: the example of the anchovy fishery of the Bay of Biscay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00107/21858/19449.pdf

Hare or Tortoise? Trade-offs in Recovering Sustainable Bioeconomic Systems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martinet, Vincent; Thebaud, Olivier; Rapaport, Alain.
In this paper, we develop a framework for (a) the study of sustainability of dynamic bioeconomic systems and (b) the definition of recovery paths from unsustainable situations. We assume that the system follows a sustainable trajectory if it evolves over time within a set of multidimensional constraints. We use the mathematical concept of viability to characterize sustainability. Recovery paths are studied with regards to their duration and their acceptability. This general framework is applied to the issue of recovering sustainable fisheries. We define sustainability in a fishery as the requirement that a set of economic, ecological, and social constraints is satisfied at all times. Recovery paths are characterized by the time required to obtain...
Tipo: Text
Palavras-chave: Sustainability; Recovery strategies; Multicriteria approach; Optimal and viable control; Bioeconomic modeling; Fisheries economics.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00016/12715/9654.pdf

Comment la stratégie MMEY atténue les effets bio-économiques du changement climatique dans les pêcheries mixtes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lagarde, Adrien; Ahad-cisse, Abdoul; Gourguet, Sophie; Le Pape, Olivier; Thebaud, Olivier; Caill-milly, Nathalie; Morandeau, Gilles; Macher, Claire; Doyen, Luc.
This paper examines the effect of climate warming on the bio-economic performance of Bay of Biscay mixed fisheries and provides insights into the best management strategy for coping with global warming. To achieve this, a dynamic multi-species, multi-class, multi-fleets model is developed and calibrated using biological and environmental ICES and IPCC data. Fishing and economic data have been collected within the European DCF. The climate represented by the Sea Surface temperature is assumed to affect species recruitment. Three management strategies are then compared in terms of bio-economic outcomes: Status-Quo (SQ), Multi-species Maximum Sustainable Yield (MMSY), Multispecies Maximum Economic Yield (MMEY). Strategies are ranked with respect to two...
Tipo: Text
Palavras-chave: Bio-économique; Scénarios; Changement climatique; Pêcheries; Soutenabilité; Golfe de Gascogne; Bio-economics; Scenarios; Global warming; Fisheries; Sustainability; Bay of Biscay.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00637/74884/75282.pdf

Does size matter? An assessment of quota market evolution and performance in the Great Barrier Reef fin-fish fishery
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Flexibility of joint production in mixed fisheries and implications for management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Briton, Florence; Thebaud, Olivier; Macher, Claire; Gardner, Caleb; Richard Little, Lorne.
Over the past decade, efforts have been made to factor technical interactions into management recommendations for mixed fisheries. Yet, the dynamics underlying joint production in mixed fisheries are generally poorly captured in operational mixed fisheries models supporting total allowable catch advice. Using an integrated ecological–economic simulation model, we explore the extent to which fishers are likely to alter the species composition of their landings in a mixed fishery managed with individual transferable quotas, the Australian Southern and Eastern Scalefish and Shark Fishery. Our simulations capture three different types of joint production problems, highlighting the flexibility that exists in terms of achievable catch compositions when quota...
Tipo: Text
Palavras-chave: Fishing behaviour; ITQ; Joint production; Mixed fisheries; Southern and Eastern Scalefish and Shark Fishery; TAC advice.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00689/80093/83146.pdf