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| Registros recuperados: 82 | |
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| 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 |
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| 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 |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00299/41070/40243.pdf |
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| 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 |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00250/36163/34722.pdf |
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| Soulie, J; Thebaud, Olivier. |
| Understanding the dynamics of fishing effort plays a key role in predicting the impacts of regulatory measures on fisheries. In recent years, there has been a growing interest in the use of bio-economic models to represent and analyze the short-term dynamics of fishing effort in response to regulation in the fisheries management literature. In this literature, fishing firms are usually modeled as autonomous decision-making units determining their harvest strategies so as to maximize profit, given technical and institutional constraints. The overall dynamics of a fishery is modeled as the result of these individual choices, and of interactions between individual choices due to the impacts of harvesting on the fish stock and/or problems of congestion.... |
| Tipo: Text |
Palavras-chave: Short run fisheries dynamics; Multi agent simulation; Bio economic modeling. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1893.pdf |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00407/51818/52410.pdf |
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| 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 |
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| 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 |
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| 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 |
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| Ano: 2002 |
URL: https://archimer.ifremer.fr/doc/00244/35508/34030.pdf |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 82 | |
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