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A bio-economic model for the ecosystem-based management of the coastal fishery in French Guiana 5
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...
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00124/23483/21311.pdf
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Applying bayesian population assessment models to artisanal, multispecies fisheries in the Northern Mokran Sea, Iran 5
Jamnia, Abdul Rashid; Keikha, Ahmad Ali; Ahmadpour, Mahmoud; Cisse, Abdoul; Rokouei, Mohammad.
Small-scale fisheries substantially contribute to the reduction of poverty, local economies and food safety in many countries. However, limited and low-quality catches and effort data for small-scale fisheries complicate the stock assessment and management. Bayesian modelling has been advocated when assessing fisheries with limited data. Specifically, Bayesian models can incorporate information of the multiple sources, improve precision in the stock assessments and provide specific levels of uncertainty for estimating the relevant parameters. In this study, therefore, the state-space Bayesian generalised surplus production models will be used in order to estimate the stock status of fourteen Demersal fish species targeted by small-scale fisheries in Sistan...
Tipo: Text Palavras-chave: Small-scale Demersal fisheries; Bayesian modelling; Generalised surplus production.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00454/56570/79995.pdf
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Climate warming vs ecological competition for marine tropical biodiversity and fisheries 5
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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Ecological-economic modelling for the sustainable management of biodiversity 5
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
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Ecoviability for ecosystem-based fisheries management 5
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
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Ecoviability for small-scale fisheries in the context of food security constraints 5
Cisse, Abdoul; Doyen, L.; Blanchard, Fabian; Bene, Christophe; Pereau, J. -c..
This paper applies a stochastic viability approach to a tropical small-scale fishery, offering a theoretical and empirical example of ecosystem-based fishery management approach that accounts for food security. The model integrates multi-species, multi-fleet and uncertainty as well as profitability, food production, and demographic growth. It is calibrated over the period 2006–2010 using monthly catch and effort data from the French Guiana's coastal fishery, involving thirteen species and four fleets. Using projections at the horizon 2040, different management strategies and scenarios are compared from a viability viewpoint, thus accounting for biodiversity preservation, fleet profitability and food security. The analysis shows that under certain...
Tipo: Text Palavras-chave: Small-scale fishery; Biodiversity; Sustainability; Profitability; Food security; Multi-species; Multi-fleet; Stochasticity; Viability; Scenario.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00276/38732/37310.pdf
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Evaluation, scénarios et viabilité écologique et économique des pêcheries côtières tropicales : application au cas de la Guyane Française 5
Cisse, Abdoul.
The need for an integrated approach to fisheries is now widely affirmed, including the FAO, in particular in the context of tropical artisanal fisheries. These small-scale fisheries, often multispecies are very important in terms of production, employment and food security. However these fisheries and the exploited resources are often characterized by a lack of data making difficult their management within an ecosystem approach, and by the ecological and economic system complexities including trophic and technological interactions. This thesis aims to contribute to the development of bioeconomic tools for small tropical fisheries in a sustainable management perspective based on the ecosystem approach. In this perspective, the French Guiana coastal fishery...
Tipo: Text Palavras-chave: Pêcherie tropicale à petite échelle; Multi-flottilles; Multispécifique; Approche ecosystémique; Analyse multivariée; Intéractions trophiques; Modélisation bioéconomique; Indicateurs bioéconomiques; Analyse de viabilité; Stochasticité; Théorie des jeux.; Tropical small-scale fishery; Multi-fleet; Multi-species; Ecosystem approach; Multivariate analysis; Trophic interactions; Bioeconomic modeling; Bio-indicators; Sustainability analysis; Stochasticity; Game theory.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00144/25492/23646.pdf
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GECO : Gestion durable des pêcheries côtières en Guyane 5
Blanchard, Fabian; Cisse, Abdoul; Guyader, Olivier; Gourguet, Sophie; Doyen, Luc; Rosele-chim, Paul.
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00075/18582/16134.pdf
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Méthodologie de collecte des données socio-économiques sur la pêche professionnelle. Guyane et Guadeloupe. Année 2020 5
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.
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00649/76105/77060.pdf
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Sustainability of tropical small-scale fisheries: Integrated assessment in French Guiana 5
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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