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| Registros recuperados: 112 | |
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| Raveau, Adriana; Macher, Claire; Mehault, Sonia; Merzereaud, Mathieu; Le Grand, Christelle; Guyader, Olivier; Bertignac, Michel; Fifas, Spyros; Guillen Garcia, Jordi. |
| Several fleets with various fishing strategies operate as a mixed fishery in the Bay of Biscay. Among the main fleets, bottom trawlers target Norway lobster (Nephrops norvegicus) and, together with gillnetters, they also catch hake (Merluccius merluccius). Trawling leads to average-size catches that are below the minimum landing size (MLS); such catches are discarded since they cannot be sold. These discards result in negative impacts on stock renewal, as most of them do not survive. This also results in an economic loss for both bottom trawlers and gillnetters since these discards represent a future loss of rent. This study, based on the 2009 and 2010 selectivity experiments at sea, assesses the short- and long-term bio-economic impacts of four... |
| Tipo: Text |
Palavras-chave: Demersal trawl fishery; Bio-economic analysis; Selectivity; Simulation; Selective device; Nephrops norvegicus; Merluccius merluccius; Atlantic Ocean. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00110/22135/19774.pdf |
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| Le Floc'H, Pascal; Daures, Fabienne; Guyader, Olivier; Wilson, James. |
| Many sectors such as the fishery show classic examples of technological lock-in and path dependence, even though some economists might predict smooth switching toward technologies that are more cost effective and sustainable. We use ideas from the evolutionary economics and public choice literatures to explain why trajectories of technological change, especially in fisheries, may not be smooth at all, but rather punctuated. The interest of technological change and switching behavior for fisheries economists and managers stems from the fact that control of effective effort, often necessary for sustainable management of the resource, remains a central management problem for that sector worldwide, even in developed countries. However, various policies put in... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00109/21987/20057.pdf |
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| Marchal, Paul; Andersen, Jesper Levring; Aranda, Martin; Fitzpatrick, Mike; Goti, Leyre; Guyader, Olivier; Haraldsson, Gunnar; Hatcher, Aaron; Hegland, Troels Jacob; Le Floc H, Pascal; Macher, Claire; Malvarosa, Loretta; Maravelias, Christos D.; Mardle, Simon; Murillas, Arantza; Nielsen, J. Rasmus; Sabatella, Rosaria; Smith, Anthony D. M.; Stokes, Kevin; Thoegersen, Thomas; Ulrich, Clara. |
| This study compares the details and performance of fisheries management between the EU and a selection of other countries worldwide: Iceland, New Zealand, and Australia, which are considered in many respects to be among the most advanced in the world in fisheries management. Fisheries management in the EU, Iceland, Australia, and New Zealand has developed following different paths, despite being based on similar instruments and principles. Iceland, Australia, and New Zealand have been at the forefront of developing management practices such as stakeholder involvement, legally binding management targets (Australia, New Zealand), individual transferable quotas, and discard bans (Iceland, New Zealand). The EU has since the beginning of the 21st century taken... |
| Tipo: Text |
Palavras-chave: Australia; Comparative review; European Union; Fisheries management; Iceland; New Zealand. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00312/42305/41699.pdf |
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| Macher, Claire; Guyader, Olivier; Boncoeur, Jean. |
| This paper proposes a formal analysis of the discarding issue including the sorting labour costs. Empirical evidences from an application to the Nephrops fishery in the Bay of Biscay show that sorting is an important time consuming activity on board and a factor of discarding. However existing literature does not explicitly take into account the sorting activity and mainly focus on quota and catch constraints. The discarding model described in the paper includes sorting as a factor explaining discards. The costs of sorting landings and the time to sort them are included in the approach. The model is developed for one species studied at a tow scale with the assumption that catches are exogenous. It is shown that taking sorting costs into account, discarding... |
| Tipo: Text |
Palavras-chave: Discarding behaviour; Sorting; Microeconomic model; Nephrops fishery; Effort constraints. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/00511/62306/66554.pdf |
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| Bellanger, Manuel; Macher, Claire; Guyader, Olivier. |
| Quota allocation mechanisms have distributional effects that are highly relevant to the economic organization of fisheries. In France, where fishing allocations are non-transferable, quotas are shared among Producer Organizations (POs) based on the historical landings of their members. Each PO is then responsible for implementing their own internal rules that provide individual or collective allocations to their members. This study investigates the distributional effects of the various quota management systems adopted by POs on quotas and production for the Bay of Biscay sole fishery. A comparison between initial allocations by vessel based on historical landings and actual observed landings is presented. Inequality metrics are used to quantify... |
| Tipo: Text |
Palavras-chave: Distribution; Inequality; Producer organizations; Catch shares; Common-pool resources; Fishery management. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00332/44359/43999.pdf |
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| 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 |
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| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/00243/35400/33920.pdf |
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| Bas, Adeline; Fresard, Marjolaine; Guyader, Olivier; Lesur-irichabeau, Gabrielle; Fournier, Nicolas; Le Gallic, Bertrand. |
| Ce document présente une des tâches en économie réalisée dans le cadre du projet ANR Comanche (Interactions écosystémiques et impacts anthropiques dans les populations de COquilles Saint-Jacques de la MANCHE). Ce projet d’une durée de trois ans (2011-2013) a vocation à améliorer la connaissance de la coquille St Jacques à l’échelle de l’ensemble de la Manche, à travers une approche écosystémique des pêcheries, en faisant appel à un large éventail de disciplines scientifiques (physique, chimie, génétique, écologie, géostatistique, modélisation, économie….). La tâche en économie de ce projet (tâche 9) vise à étudier les relations entre les systèmes de régulation des deux principaux gisements (baie de St Brieuc et baie de Seine) et les performances... |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00241/35225/33728.pdf |
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| Guyader, Olivier; Robert, Bauer; Reynal, Lionel. |
| Moored fish aggregating devices (MFADs) are increasingly being used in small-scale tropical fisheries to access pelagic fish species that are otherwise difficult to harvest in large numbers. Little attention has yet been paid to monitoring MFADs in coastal areas, however. This is most likely due to the small-scale nature of most fisheries that utilize them and the presumed lower impact of those fisheries on fish stocks and their ecosystems. In this paper, we examined the abundance and density of MFADs around Guadeloupe, using aerial line transect surveys. Estimated MFAD densities were found to be high compared with previously reported densities in this area, especially within the 22–45 km range offshore. We examine and discuss possible reasons for these... |
| Tipo: Text |
Palavras-chave: Small-scale fisheries management; Dolphinfish; Yellowfin tuna; Aerial survey; Fish aggregating devices (FAD). |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00355/46605/46727.pdf |
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| Guyader, Olivier; Daures, Fabienne. |
| Data Envelopment Analysis (DEA) models are applied to the main French seaweed fleet to examine capacity output, capacity utilization, and scale inefficiency. Coastal seaweed vessels target only one output - kelp - with the same gear but with different input level combinations. The fishery is seasonal and subject mainly to input regulations, especially a one trip per day regulation implemented in 1987. The consequence was a decline in total observed output and a fall in capacity output and efficient output. Only the largest vessels and a few small vessels harvesting without this regulatory constraint operate at the optimal scale. The question of a change in regulation, especially a shift to an individual quota system, is raised. |
| Tipo: Text |
Palavras-chave: Data Envelopment Analysis; Capacity; Capacity utilization; Scale in- efficiency; Production frontier; Seaweed; Fleet. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00243/35439/33968.pdf |
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| Bertrand, Jacques; Guyader, Olivier; Reynal, Lionel. |
| In the French West Indies islands, the transfer of chlordecone (kepone) from treated grounds towards the marine environment has been proved since the beginning of 2000s. In 2008, a maximal residue limit (MRL) was set at 20 µg / kg wet weight in fish and seafood, and therefore intensified the concern about the risks of high human exposure to the pesticide due to the consumption of contaminated marine products. To answer this concern, several sampling cruises were carried by public authorities and by Ifremer in order to analyze the contamination of the fish fauna around the Guadeloupe island. The data collected within these surveys improved our knowledge on the characteristics of the contamination of fish fauna and allowed to assess the distribution of this... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00136/24762/22840.pdf |
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| Daures, Fabienne; Le Grand, Christelle; Macher, Claire; Leonardi, Sophie; Guyader, Olivier; Rostiaux, Emilie; Quinquis, Jerome; Barone, Herve; Miossec, Dominique; Raguenes, Pierre; Truffy, Francois; Le Ru, Loic; Monhurel, Lise. |
| Ce document est une synthèse des enquêtes réalisées auprès des pêcheurs professionnels en 2011 dans le cadre du Système d'Informations Halieutiques (SIH) de l'Ifremer. Il vient en complément des synthèses annuelles sur les flottilles de pêches et présente des données agrégées sur les navires enquêtés, leurs stratégies, les équipages et la population des patrons pêcheurs qui ont accepté de répondre au questionnaire économique du SIH en 2011 (sur les données 2010). |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00148/25910/23937.pdf |
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| Guyader, Olivier. |
| Une perception largement répandue est que la flotte de pêche de l'Union Européenne (UE) est détenue par une multitude de propriétaires individuels. Cependant, des informations sur les acquisitions d'entreprises de pêche de l'UE par les entreprises d'autres États membres ou de pays tiers (hors UE) montrent que cette perception est une simplification d'une réalité plus complexe, pouvant être caractérisée par des entreprises détenant plusieurs navires, par des phénomènes d’intégration verticale par des société situées en aval de la filière ou encore des achats de fonds d’investissement. Aucun travail méthodologique n’a jamais été mené sur le sujet et le projet vise en utilisant des sources de données originales à analyser la structure de la propriété des... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00598/71010/69282.pdf |
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| Blanchard, Fabian; Guyader, Olivier; Roos, David; Reynal, Lionel; Weiss, Jerome. |
| Ce rapport est une réponse à la saisine DPMA 18-13767 (annexe 1). Il propose dans une première partie une synthèse des productions par espèce pour la Guadeloupe, la Martinique, la Guyane, La Réunion et Mayotte, ainsi que l’effort de pêche par flottille/métiers pour ces territoires ultra-marins (rapport OBSDEB 2018, annexe 2) et une synthèse de l’état des stocks qui font l’objet d’une évaluation. La seconde partie du rapport est consacrée à un diagnostic de l’état des connaissances et des priorités d’acquisition de connaissance en vue d’une approche écosystémique de la gestion des pêcheries concernées. NB. Cette deuxième partie sera livrée fin avril 2019. |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00506/61723/65694.pdf |
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| Registros recuperados: 112 | |
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