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Registros recuperados: 263
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A note on progress in the bioeconomic modelling of fishing activity in the North Sea ArchiMer
Catanzano, Joseph; Cunningham, S.
Over the relatively recent past, bioeconomic modelling has advanced by integrating major theoretical and analytical progress made in both economic and biological modelling. The movements from static towards dynamic models and from global towards analytical models were the first steps in this advance. More recently, research has turned towards veritable optimisation models incorporating risk, asymmetrical information, and chaotic and multiple equilibria. Attempts to validate such models have been based on case studies of more and more homogenous fisheries (jesmall numbers of stocks and exploitation systems) so that the objective function is quite explicit and limited. This change of emphasis has occurred however without a re-consideration of the aim of the...
Tipo: Text Palavras-chave: SEM.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/acte-4217.pdf
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Actividad antifúngica in vitro de quitosanos sobre Bipolaris oryzae patógeno del arroz Acta Agron. (Palmira)
Rodríguez Pedroso,Aida Tania; Plascencia Jatomea,Maribel; Bautista Baños,Silvia; Cortez Rocha,Mario Onofre; Ramírez Arrebato,Miguel Ángel.
En el presente trabajo se evaluó el efecto y la Concentración Media Inhibitoria (CMI50) de quitosanos de diferentes masas moleculares en el crecimiento micelial, el diámetro de las hifas, los cambios estructurales, la germinación de esporas y la producción de biomasa del hongo Bipolaris oryzae. Los resultados mostraron que el quitosano de masa molecular media presentó mayor efecto inhibitorio (P < 0.05); sin embargo, el quitosano de masa molecular baja afectó más el diámetro de las hifas a la mayor concentración utilizada (4000 mg/l). Las observaciones de las hifas realizadas por Microscopía Electrónica de Barrido (MEB) mostraron que el hongo tratado con quitosano a la concentración de 3000 mg/l presentó una alta producción de esporas. El quitosano de...
Tipo: Journal article Palavras-chave: Biomasa; Esporas; CMI50; SEM.
Ano: 2016 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122016000100014
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Adéquation entre effort de pêche et ressource : les actions publiques dans le secteur des pêches ArchiMer
Lantz, Frederic; Catanzano, Joseph; Weber, Jacques.
Fishing is an economic activity that, in a general way, requires the implementation of regulatory measures to avoid crises. This problem is linked to certain peculiarities inherent to fishing: the renewable and common character of the exploited resource, and the great variability of catches. Since the entire means of production coming into play in fishing is designated by the term fishing effort, various regulatory policies will become attached to the idea of fitting the level of the fishing effort to that of the exploited resource. After introducing the evolution of the fishing sector in an early section, we will study the main lines of EU policy in the sphere of fishing in section II. Section III will be devoted to the Multi-Year Orientation Programme...
Tipo: Text Palavras-chave: SEM.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-2481.pdf
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Agri-environmental attitudes of Chinese farmers – The impact of social and cognitive determinants AgEcon
Weber, Daniela.
Chinas’ successfully increased food production during the last 30 years has caused significant negative external impacts and subsequent escalating environmental costs (Ash and Edmonds, 1998). This dilemma has recently become a popular issue and the government attaches great importance towards a more sustainable agricultural production (UNDP, 2006). The challenge is to enhance well-grounded approaches that accomplish of effective agricultural trainings, encouraging farmers to adopt optimized practices. According to recent decision-making theories, a successful implementation is also closely related to the target group’s social and cognitive preferences. In order to get more information about farmers’ inherent decision-making factors an explorative...
Tipo: Conference Paper or Presentation Palavras-chave: China; Agri-environmental attitudes; Guānxi; SEM; Values; Land Economics/Use.
Ano: 2011 URL: http://purl.umn.edu/108964
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Alternative management strategies : potential and limits of licensing systems ArchiMer
Meuriot, Eric; Maucorps, Alain.
Tipo: Text Palavras-chave: SEM.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/rapport-4107.pdf
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Amenagement des peches dans les eaux communautaires: potentiel et limites des systemes de licences ArchiMer
Meuriot, Eric; Maucorps, A.
Fishing regulations in waters under the responsibility of the EEC mainly concern three techniques of site development: - catch quotas by species and by area (TAC, a word adapted from the English Total Allowable Catch); - the definition – of the technical characteristics of the fishing devices used (meshing, type of trawl,...); - setting a minimum commercial size for each species. The regulations of meshing and other constraints relating to the technical characteristics of the fishing devices aim to modify the composition of the catches by age class. The TACs are a technique for controlling the level of exploitation of the stocks. Controlling the fishing effort that they generate is carried out indirectly in the short or mid term. For many years now,...
Tipo: Text Palavras-chave: SEM.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/rapport-2509.pdf
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Aménagement des pêches lagunaires en Côte d'Ivoire ArchiMer
Doucet, F; Chauvet, C; Gilly, Bernard; Meuriot, Eric.
Les changements intervenus dans les pêches lagunaires de Côte d'Ivoire au cours des vingt dernières années ont Crée de nombreux problèmes. Ces changements ont souvent pris la forme d'une introduction de nouveaux engins de pêche plus efficaces. Cela a non seulement entrai-né un accroissement considérable de l'effort de pêche et une certaine surexploitation des stocks, mais est aussi devenue une source nouvelle de conflits entre les pêcheurs continuant à employer les engins traditionnels et ceux utilisant les nouveaux engins. A la demande du Gouvernement, une mission FAO s'est rendue en Côte-d'Ivoire en mars-avril 1985 afin de préparer un plan d'aménagement des pêcheries lagunaires. A cette fin, la mission a procédé à une évaluation bio-économique de l'état...
Tipo: Text Palavras-chave: SEM.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/rapport-4230.pdf
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An analysis of seafood consumption survey methods in France. ArchiMer
Girard, Sophie; Mariojouls, Catherine; Paquotte, Philippe; Wisner-bourgeois, Claude.
(Not controled OCR) The different statistical data sources available for seafood I consumption analysis in France belong to three types : the apparent consumption estimated on the basis of a balance between production and trade, used at national scale and for international comparison, the data in value published by the national Institute for economic statistics, aggregating food balance sheet, and economic results of inquiries about the activities of the branch industries, and the household consumption estimated through consumers' panels. A critical and historical analysis of the different available data series is presented, with focus on the major difficulties when interpreting and cross-checking the data (series breaking-nomenclature items, range of...
Tipo: Text Palavras-chave: France; Analysis; Methods; Consumption; Seafood; SEM.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/acte-2524.pdf
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An introduction to japanese and french fisheries ArchiMer
Bailly, Denis; Bourguignon, G; Kase, K.
Fisheries and aquaculture in Japan and France are very different in terms of scale and management schemes. Japan, a leading country in the world for fisheries, has developed a unique mixed system of community based coastal management and licensing schemes for off-shore and distant-water fisheries. Increasing demand, changes in consumption and the heavy constraint of access limitation to third countries waters, make Japan more and more depending upon imports. Though few effort and access limitation schemes are locally implemented in France, most of the management rules comply with the Common Fisheries Policy (CFP). The basic lines are the technical measures, the Total Allowable Catches (TACs) allocated into quotas at the regional level and the reduction of...
Tipo: Text Palavras-chave: SEM.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-4153.pdf
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An overall perspective on aquaculture ArchiMer
Aquaculture is an important part of the Common Fisheries Policy. Indeed, the Community incentives policy for the farming of sea or fresh water fish, shellfish and molluscs must contribute to supplying the Common Market with fisheries products and to reducing the chronic negative trade balance in this area. The collection of statistics on the economic and social aspects of Aquaculture in the European Community is not a straightforward process. [NOT CONTROLLED OCR]
Tipo: Text Palavras-chave: SEM.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-4280.pdf
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Analyse bio-économique des activités conchylicoles en France : perspectives et limites ArchiMer
Gilly, Bernard; Meuriot, Eric.
Bio-economic models have not been extensively developed for the shellfish farming sector. However, this type of model could constitute a valuable analysis and assessment tool. Only the potential contribution of this kind of model in our knowledge of the evolution of production systems and marketing are discussed here. These models help comprehend the interactions between the strategies of the different players in the sector and also-on the level of individual businesses-between the shellfish farming sector, as well as the other economic activities that utilise shellfish farming areas, and the type of activity. In particular, it is possible to show the externalities that affect shellfish farming (for example, by revealing the relationships between nutrient...
Tipo: Text Palavras-chave: SEM; Analyse économique; Stratégie d'exploitation; Externalités; Modèles bio économiques; Conchyliculture.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/rapport-4164.pdf
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Analyse de la valeur patrimoniale d'espaces littoraux. Une application à l'étang de Thau ArchiMer
Rudloff, M.a.; Salles, J.m..
In light of the diminishing wetlands, collective management of these natural areas is becoming a major issue in many countries, particularly in Europe. As a multi-use space, wetlands are coastal areas that are, in practice, subject to conflicts of use among various categories of stakeholders who all consider this natural heritage in terms of their own, and sometimes contradictory, purposes. These conflicts of use can be mediated in several ways. First, wetlands depend on a complex decision process that must integrate diverse rationales. Economic rationales when commercial activities compete; social and political rationales, because natural areas, particularly coastal areas where the human population is particularly dense, are subject to regulations issued...
Tipo: Text Palavras-chave: SEM.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/rapport-4224.pdf
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Analyse des comportements financiers des entreprises et essais de typologie dans le secteur des peches artisanales ArchiMer
Foucault, François; Gerinette, Valérie; Lemaire, Catherine.
(Not controled OCR) The economic results of artisanal fishing enterprises are investigated through a sample of 300 to 700 artisanal vessels for which account books. The use of economic (such as added value) and financial ratios (solvency and financial autonomy) leads to identification of four groups of firms. Over the period, financial rentability and autonomy show obvious damaging that underlines the relance of a (current) analysis on the impact of public subsidies on the enterprises behaviour.
Tipo: Text Palavras-chave: Indebtness; Investment; Return; Small scale fisheries; SEM; Endettement; Investissement; Rentabilité; Pêche artisanale.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/rapport-2432.pdf
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Analyse des resultats et des comportements economiques des entreprises de peche artisanale ArchiMer
Catanzano, Joseph; Gilly, Bernard; Lantz, Frederic; Durand, M.h..
(Not controled OCR) The economic results of artisanal fishing enterprises are investigated through a sample of 300 to 700 artisanal vessels for which account books are available from 1983 to 1986. The use of economic (such as added value) and financial ratios (solvency and financial autonomy) leads to the identification of four groups of firms. A rough classification has been identified from gears used and areas. Over the period, financial rentability and autonomy show obvious damaging that underlines the relevance of a (current) analysis on the impact of public subsidies on the enterprises behaviour.
Tipo: Text Palavras-chave: Indebtness; Investment; Rentability; Artisanal fisheries; SEM; Endettement; Investissement; Rentabilité; Pêche artisanale.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/1988/rapport-2424.pdf
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Analyse du comportement des flottilles de pêche de Boulogne sur Mer ArchiMer
Allard, M. O..
Le projet de recherche actuel répond donc A un besoin d'enrichissement mutuel des approches biologiques et économiques face A un double enjeu : - socio-économique : la crise subie par un secteur représentant traditionnellement l'activité principale de certaines régions, - écologique : la survie de certaines espèces menacées par une pêche excessive, les deux enjeux étant directement liés dans de nombreux. L'idée est la suivante : à. partir des comportements de pêche observés au cours d'une année sur l'ensemble des bateaux de pêche inscrits A Boulogne-sur-Mer,essayer de définir des stratégies-types et d'isoler ainsi des groupes de bateaux aux comportements voisin. Cela devrait conduire A des distinctions de flottilles plus pertinentes que les...
Tipo: Text Palavras-chave: SEM.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/rapport-4216.pdf
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Analyse du déclin de la pêche artisanale à St Pierre et Miquelon ArchiMer
Eynaud, P.
Studying the reasons behind the decline in small-scale fisheries at Saint Pierre and Miquelon (SPM) requires assessing this decline. Between 1950 and 1985, the number of vessels utilised in small-scale fisheries dropped by a factor of seven and the mean age of fishers increased by 13 years. Individual catches have nevertheless remained stable and have even increased slightly since 1963. Can it be deduced that the crisis in small-scale fisheries is only due to a problem of fish stocks and the adjustment of the number of fishers to stock availability? Must the causes of decline be sought in the development of industrial fisheries? In the increase in costs? Or in market studies? By placing SPM in its geographical and historical context, these questions take...
Tipo: Text Palavras-chave: SEM.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/rapport-4088.pdf
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Analyse économique d'un projet d'élevage de crevettes en cages dans la région de Salvador de Bahia. Rapport de mission au Brésil du 27 Novembre au 8 Décembre 1993 ArchiMer
Paquotte, Philippe.
Cette mission a été réalisée dans le cadre de l'accord de coopération signé en juin 1992 entre IFREMER et différents organismes brésiliens (Bahia-Pesca, Université de Salvador, Littoral Sul Maricultura, Sansuy de Nordeste SA, Rohr Estrutura Tubulares SA). Cette coopération concerne la mise au point d'une technique innovante pour l'élevage de la crevette pénéide, l'élevage en cages flottantes et l'application de cette technique à un projet de développement d'une petite région de pêche au sud de Salvador de Bahia. [OCR NON CONTRÔLE]
Tipo: Text Palavras-chave: SEM.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/rapport-4017.pdf
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Analyse économique d'une nouvelle technique d'élevage de crevettes en cages flottantes au Brésil ArchiMer
Paquotte, Philippe.
In the framework of French-Brazil co-operation, the French Institute of research for exploitation of the sea (IFREMER), the State of Bahia and the company Littoral Sul Maricultura have developed a new technique for shrimp farming (Penaeus vannamei) using floating cages. After trials carried out during three years, this technique turns out very interesting from several viewpoints. The growth speed and the survival rate are very good, the negative effects on the environmental quality are weak and local fishermen have proved eager to adopt this technique as a part-time activity. In the same time, a technico-economic analysis, using a computerised simulation tool, as well as a market analysis in the State of Bahia have been carried out in order to assess the...
Tipo: Text Palavras-chave: SEM.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/1996/acte-4071.pdf
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Analyse économique et financière de la vénériculture. Perspectives de développement de la filière palourde d'élevage ArchiMer
Le Goff, P. Y..
Clam culture is a shellfish farming activity that has now entered a phase that will determine its future. After the first experimental trials and pilot projects, private investors have set this new aquaculture activity in motion. Today, the progress of clam production is conditioned, in part, on public authorities and financial organisations. On what basis should decisions be made so that appropriate choices are made for the development of clam culture, while respecting other users of coastal areas? This financial and economic study of clam culture seeks to give an overview of current clam farming by analysing operations that have entered the production phase. This approach to productivity of this activity will be done using classical financial analysis...
Tipo: Text Palavras-chave: SEM.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/these-4082.pdf
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Analyse socio-économique de l'exploitation des crevettes en Guyane française ArchiMer
Gilly, Bernard; Cochet, Y.
Shrimp fisheries in French Guyana suffer from the influence of exogenous pressures on shrimp stock. In terms of shrimp stock, the fluctuations in recruitment are very high and determine for the most part the annual production of shrimp boats (Figure 1). Work in progress on the evolution of shrimp stocks suggest that the relatively short shrimp life span (18 months) does not allow a cohort to be exploited over more than one year. In terms of the shrimp boat fleet, there are no alternative outlets for fishing effort.
Tipo: Text Palavras-chave: SEM.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/rapport-4138.pdf
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