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| Registros recuperados: 61 | |
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| Weiss, Jerome; Duchene, Julie; Le Blond, Samuel; Mansuy, Emmanuel; Blanchard, Fabian; Demaneche, Sebastien; Berthou, Patrick; Le Roy, Emilie; Leblond, Emilie; Système d'Informations Halieutiques de l'Ifremer.. |
| Le présent document est une restitution globale des données disponibles au sein du SIH sur les navires de pêche français, et en particulier : • le fichier « Flotte de Pêche Communautaire » (FPC), qui référence l'ensemble des navires de pêche professionnelle de la flotte française et leurs caractéristiques techniques (source : DPMA) ; • les données du flux déclaratif, c'est-à-dire les déclarations de captures et d'effort de pêche des pêcheurs professionnels, issues des journaux de bord pour les navires de 10 mètres et plus et des fiches de pêche pour les navires de moins de 10 mètres (source : DPMA) ; • les données de ventes (essentiellement des ventes en criée) des navires de pêche professionnelle (source : DPMA) ; • les données d'enquêtes « Activité »... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00492/60417/63853.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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| Leonardi, Sophie; Le Grand, Christelle; Merzereaud, Mathieu; Bettali, Tiphaine; Blanchard, Fabian; Mansuy, Emmanuel; Cisse, Abdoul; Guyader, Olivier. |
| This report describes the methodology for collecting economic data on commercial fleets in Guyana and Guadeloupe during the 2020 survey. The context and the objectives for producing indicators within the EU data collection framework, the survey is presented including the organization and collection procedure, field training and reporting as well as communication. The links to the technical documents are provided in particular the questionnaire used. The collection sampling plan is detailed with a description of, the reference population, the stratified sampling frame, the calculation of the sampling allocations. The samples are also described. The annex presents a summary of the questionnaire. |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00649/76105/77060.pdf |
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| Sanz, Nicolas; Diop, Bassirou; Blanchard, Fabian; Lampert, Luis. |
| The purpose of this paper is to investigate the environmental nature of the French Guiana shrimp fishery dynamics through an empirical analysis. To do so, we specify a global harvest production function, in which the output depends on the number of days at sea and the stock level. In addition, we use some environmental variables representing the ‘El Niño’ and ‘la Niña’ phenomena, the sea surface temperature, and the flow of some Amazonian rivers as instruments. This method enables us to correct the well-known simultaneous bias between the harvest and the stock levels and to show that harvest is significantly dependent on the environmental factors analyzed, which may compromise the future of the French Guiana shrimp fishery in the context of climate change. |
| Tipo: Text |
Palavras-chave: Fisheries; Harvest production function; El Ni(n)over-tildeo; La Ni(n)over-tildea; Amazonian rivers. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00334/44486/44200.pdf |
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| Gomes, Helene; Kersulec, Coralie; Doyen, Luc; Blanchard, Fabian; Cisse, Abdoul; Sanz, Nicolas. |
| Marine ecosystems, biodiversity and fisheries are under pressure worldwide because of global changes including climate warming and demographic pressure. In that regard, many scientists and stakeholders advocate the use of an ecosystem approach for fisheries integrating the numerous ecological and economic complexities at play, instead of focusing on the management of isolated target species. However, the way to operationalize such an ecosystem approach remains challenging, especially from the bioeconomic viewpoint. To achieve this, here we propose a model of intermediate complexity (MICE) relying on multi-species and multi-fleets dynamics. The model also takes into account climate change through a model of envelope for the biological growth of the fish... |
| Tipo: Text |
Palavras-chave: Marine biodiversity; Multi-species; Multi-fleet fishery; Models of Intermediate Complexity (MICE); Climate change; Exclusion principle. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00640/75222/75364.pdf |
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| Weiss, Jerome; Lespagnol, Patrick; Demaneche, Sebastien; Leonardi, Sophie; Bourjea, Jerome; Evano, Hugues; Reynal, Lionel; Guyader, Olivier; Baulier, Loic; Blanchard, Fabian; Berthou, Patrick; Daures, Fabienne; Leblond, Emilie; Merrien, Claude; Leblond, Samuel. |
| Le programme d’observation des marées au débarquement, appelé « ObsDEB », contribue à l’estimation de l’effort de pêche et des captures des flottes de pêche françaises. Il vise tout particulièrement les flottilles de petite pêche côtière et procède à la collecte des informations requises selon un plan d’échantillonnage adapté à chaque région suivie. Ce rapport est le Rapport annuel de Convention DPMA-Ifremer 2015 et présente les estimations 2015 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane. |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00360/47133/47082.pdf |
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| Vergnon, Rémi; Blanchard, Fabian. |
| The necessity to move from a traditional fishery management to an ecosystem approach is now acknowledged. Indicators are required to support the development of this approach. For example, community indicators have been proposed to assess the impact of fishing. We tested here the applicability of one such community indicator, the abundance-biomass comparison (ABC method), as a measure of the impact of bottom trawling (years of sampling: 2001 and 2003) on the benthic invertebrates-typically starfishes, crabs, squat lobsters, shrimps and large hard-shelled molluscs-of "Grande Vasiere", a major French fishing zone, in the Bay of Biscay. The ABC method is generally used as an impact indicator for different types of physical, biological and anthropogenic... |
| Tipo: Text |
Palavras-chave: Atlantic Ocean; Inter annual variability; Density; Macrobenthos; ABC method; Fishing impact; Indicator; Bottom trawl survey. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2133.pdf |
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| Diop, Bassirou; Sanz, Nicolas; Junior Duplan, Yves Jamont; Guene, El Hadji Mama; Blanchard, Fabian; Pereau, Jean-christophe; Doyen, Luc. |
| This paper deals with fishery management in the face of the ecological and economic effects of global warming. To achieve this, a dynamic bioeconomic model and model-based scenarios are considered, in which the stock's growth function depends on the sea surface temperature. The model is empirically calibrated for the French Guiana shrimp fishery using time series collected over the period 1993–2009. Three fishing effort strategies are then compared under two contrasted IPCC climate scenarios (RCP 8.5 and RCP 2.6). A first harvesting strategy maintains the Status Quo in terms of fishing effort. A more ecologically-oriented strategy based on the closure of the fishery is also considered. A third strategy, which relates to Maximum Economic Yield (MEY), is... |
| Tipo: Text |
Palavras-chave: Renewable resources; Fishery bioeconomic model; Climate change; Climate scenarios; Adaptation; Shrimp. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00453/56418/58115.pdf |
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| Blanchard, Fabian. |
| Species diversity variations between the demersal fish assemblages of the Bay of Biscay (Atlantic Ocean) and of the Gulf of Lions (Mediterranean Sea) are analysed on a decade scale. The aim of this study is to interpret the dynamics of these two communities characterised by different level of fishing intensity. Data come from trawl surveys carried out for the direct evaluation of the demersal stocks abundance from 1983 to 1997. Diversity indices used are the Hill's indices N1 and N2, the species richness S, the evenness J', the K-dominance curves and the life strategy of the dominant species. Three demersal fish assemblages are defined in the community of the Bay of Biscay and in that of the Gulf of Lions: coastal, continental shelf, and continental slope.... |
| Tipo: Text |
Palavras-chave: Gulf of Lions; Bay of Biscay; Demersal fish; Community dynamics; Species diversity. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-1393.pdf |
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| Guarini, Jean-marc; Blanchard, Fabian; Bacher, Cedric; Gros, Philippe; Riera, P; Richard, P; Gouleau, D; Galois, R; Prou, Jean; Sauriau, Pg. |
| Microphytobenthos plays an important role as primary producer in shallow embayments subject to a tidal regime. The present paper aims to characterize the spatial patterns of sedimentary chlorophyll a (chl a) biomass in 2 seasons in the wide intertidal mudflats of the Marennes-Oleron Bay (France); furthermore, it provides estimates of total microphytobenthic biomass. Accordingly, a systematic sampling scheme was performed in June 1995 and in January 1996. On average, biomass was higher in June (ca 120 mg chi a m(-2)) than in January (ca 85 mg chi a m(-2)). Moreover, the geostatistical analysis revealed that spatial similarities were propagated over larger distances in June (6 km) than in January (2.2 km). In order to account or this result, we suggest that... |
| Tipo: Text |
Palavras-chave: Microphytobenthos; Chlorophyll a; Spatial distribution; Geostatistics; Intertidal mudflat. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00447/55852/58117.pdf |
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| Cisse, Abdoul; Blanchard, Fabian; Guyader, Olivier. |
| Like many tropical small-scale fisheries, the French Guiana coastal fishery is characterized by the high fish biodiversity of its ecosystem, the weak selectivity of the fleets exploiting the resources, and the heterogeneity of the vessels in terms of size and fishing techniques. The Rapfish method is used to assess sustainability within 11 fishery systems by means of 27 attributes relating to ecological, economic, social, and technological fields. Overall results indicate an average performance in the weak sustainability range. Comparisons made among the FSs show a gradient of sustainability performance from the western portion of the coast to the eastern portion. Several recommendations are formulated to raise the current “sustainability” status, such as... |
| Tipo: Text |
Palavras-chave: French Guiana; Small scale fishery; Sustainability; Rapfish; Ecosystem approach. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00162/27310/25662.pdf |
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| Baulier, Loic; Biseau, Alain; Blanchard, Fabian. |
| L'évaluation du stock de crevettes café (Farfantepenaeus subtilis) de Guyane a été réalisée à partir des données de débarquement par catégories commerciales des chalutiers guyanais, à l'aide d'un modèle structuré en âge (VPA) paramétré séparément pour les mâles et les femelles. Ce modèle a permis de reconstituer les séries des effectifs et mortalités par pêche mensuels aux âges depuis 1989 jusqu'au mois de juin 2016. L'application d'un modèle de recrutement par recrue a ensuite permis de poser un diagnostic sur le niveau d'exploitation des deux composantes du stock. Ce stock, dont la biomasse a fortement diminué depuis le début de son exploitation, demeure à des niveaux de biomasse bas. L’analyse montre une légère surexploitation de croissance en ce qui... |
| Tipo: Text |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00373/48371/79230.pdf |
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| Poulard, Jean-charles; Blanchard, Fabian. |
| Many fish species are at the southern or northern limit of their distribution range tit the Bay of Biscay, where large-scale hydroclimatic changes have occurred in recent decades. We attempt here to identify the impact of these changes on the fish community of the eastern continental shelf of the Bay of Biscay. Data collected during 14 autumn groundfish surveys in 1973 and from 1987 to 2002 are used. The study area is between latitudes 48 degrees 30'N and 43 degrees 30'N while the depth ranges from 15 to 200 m. Annual abundance indices (number of individuals per km(2)) of 56 fish taxa present on average in at least 5% of the tows are computed. Multivariate analysis is used to detect temporal trends in these species' abundance indices. Assuming that... |
| Tipo: Text |
Palavras-chave: Groundfish surveys; Fish community; Climate change; Bay of Biscay. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-824.pdf |
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| Le Floc' H, P; Poulard, Jean-charles; Thebaud, Olivier; Blanchard, Fabian; Bihel, J; Steinmetz, Fabien. |
| Market position and its evolution were analysed in nine key fish and cephalopod species subject to long-term changes, using the Bay of Biscay fisheries as a case study. Although such long term changes have already been documented, and in some cases shown to be related to the impacts of fishing, changes in the physical environment, or both, relatively little work has been devoted to their potential consequences in economic terms. The nature and extent of these consequences was determined in the present study by looking at the composition of the affected fish production, and the status of different fish products on the markets. We propose a methodology to characterize market position for this set of nine species. The selected species represent a significant... |
| Tipo: Text |
Palavras-chave: Atlantic Ocean; Fish market; Macro economic aggregates; Environmental change. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4716.pdf |
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| Cisse, Abdoul; Gourguet, Sophie; Doyen, L.; Blanchard, Fabian; Pereau, J. -c.. |
| This paper offers a theoritical and empirical model of ecosystem-based fishery management. A multi-species and multi-fleet integrating Lotka-Volterra trophic dynamics as well as production and profit assessments is developed and applied to the coastal fishery of French Guiana. This small-scale fishery constitutes a challenging example with high fish biodiversity, several non-selective fleets and a potentially increasing local food demand due to demographic growth. The dynamic model is calibrated with 13 species and four fleets using monthly catch and effort data from 2006 to 2009. Several contrasted fishing scenarios including status quo, total closure, economic and viable strategies are then simulated. They are compared from the viewpoints of both... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00124/23483/21311.pdf |
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| Registros recuperados: 61 | |
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