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Registros recuperados: 17
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Biophysical Study Of Marine And Fishery Resources At Moree, OceanDocs
Koranteng, K.A..
A fishery resource profile for Moree has been developed to help in exploring linkages between migration dynamics and the organisation and management of fishery activities in the study community. The biophysical study component of the Small Scale Fisheries in Africa project involves the following: (a) an assessment of the quality and quantity of fish and marine resources available to the community including best estimates of current fish stocks and natural patterns affecting their availability, (b) a review of the main types of fishing technologies used to exploit fish stocks in the community, (c) any significant qualitative and quantitative changes in fish stocks which have been documented in recent years, and (d) an assessment of the main biological and...
Tipo: Conference Material Palavras-chave: Fishery resources; Marine resources; Biophysics.
Ano: 2002 URL: http://hdl.handle.net/1834/653
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Changes in the dynamics and biology of small pelagic fisheries off Côte-d'Ivoire and Ghana : an ecological puzzle IRD
Pezennec, Olivier; Koranteng, K.A..
Les dynamiques spatiales et temporelles des petits pélagiques côtiers de l'écosystème ivoiro-ghanéen et les changements dans la biologie des poissons sont examinés. Durant les deux dernières décennies l'abondance de la population de #Sardinella aurita$ est passée d'un état en déplétion à un état prospère. Ces changements drastiques n'apparaissent pas en conformité avec les précédentes connaissances acquises sur les espèces et les pêcheries de l'ouest du Golfe de Guinée. Cependant, le renforcement du petit upwelling apparaît comme la seule cause probable responsable des changements observés. (Résumé d'auteur)
Tipo: Text Palavras-chave: ECOSYSTEME; ZONE COTIERE; ESPECE PELAGIQUE; DYNAMIQUE DE POPULATION; VARIATION SPATIALE; VARIATION TEMPORELLE; UPWELLING; SARDINELLE; ABONDANCE.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010015318
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Comparative study of the dynamics of small-scale marine fisheries in Senegal and Ghana IRD
Ferraris, Jocelyne; Koranteng, K.A.; Samba, A..
Les pêcheries artisanales du Sénégal et du Ghana sont décrites et comparées. La structure des flotilles, les tendances des débarquements et la composition spécifique des captures sont analysées. Situées dans les zones d'upwelling d'Atlantique est, ces pêcheries tropicales multispécifiques, multiengins sont influencées par une forte composante environnementale. La variabilité et l'instabilité des ressources marines soulèvent le problème de l'interaction entre les dynamiques de l'environnemenet, des ressources renouvelables et des sociétés de pêcheurs. Les changements observés sur une décade sont interprétés sous l'angle de la dynamique du système d'exploitation. Les changements locaux et globaux sont abordés en termes de tactique et de stratégie de pêche...
Tipo: Text Palavras-chave: ECOSYSTEME; PECHE ARTISANALE; UPWELLING; EFFORT DE PECHE; COMPOSITION DES PRISES; ESPECE PELAGIQUE; STRATEGIE DE PECHE.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010015325
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Diversity and stability of demersal species assemblages in the Gulf of Guinea OceanDocs
Koranteng, K.A..
The structure of demersal fish assemblages on the continental shelf and upper continental slope of the Gulf of Guinea is described. Community structure is determined primarily by depth and type of sediment on the seabed. Changes in the composition of the identified species assemblages over a 25-year period are examined. The dynamics of the assemblages are influenced by physico-chemical parameters of the water masses, mainly temperature, salinity and dissolved oxygen, which are periodically modified by the seasonal coastal upwelling that occurs in the western Gulf of Guinea. Increased irresponsible fishing operations (like the use of explosives) that lead to habitat alteration and other anthropogenic activities like oil and gas exploration which have the...
Tipo: Journal Contribution Palavras-chave: Assemblages; Ecosystems; Demersal fish; Ecosystems; Http://aims.fao.org/aos/agrovoc/c_2482.
Ano: 2001 URL: http://hdl.handle.net/1834/1265
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Information on fisheries in Ghana OceanDocs
Koranteng, K.A.; Hutchful, G.; Tetebo, A.Y..
Directorate of Fisheries / Ministry of Food and Agriculture (MOFA)
Tipo: Report Palavras-chave: Fishery resources; Fishery policy; Gross domestic product; Http://aims.fao.org/aos/agrovoc/c_28885.
Ano: 2004 URL: http://hdl.handle.net/1834/190
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Management Issues for the Sustainable Use of Lagoon Fish Resources OceanDocs
Entsua-Mensah, M.; Ofori-Danson, P.K.; Koranteng, K.A..
Coastal lagoons form an integral part of marine fisheries and provide important spawning and nursery grounds for many fish species. The economic contributions of lagoon fisheries have not been given adequate consideration by fisheries authorities. Ghana's 550-km coastline includes over 90lagoons. These lagoons and their wetlands provide valuable products and services, which include supporting the fisheries, absorbing floodwaters and protecting biodiversity. They also serve as roosting, nesting and feeding sites for many species of birds. Through the support of the World Bank and the Global Environmental Facility, Ghana has designated five coastal wetland areas as Ramsar sites due to their importance as fishing areas and as roosting, nesting and feeding...
Tipo: Proceedings Paper Palavras-chave: Sustainable fishing; Lagoon fisheries; Biodiversity.
Ano: 2000 URL: http://hdl.handle.net/1834/699
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Remote Sensing Needs and Capabilities In West Africa OceanDocs
Koranteng, K.A.; Opoku-Duah, S..
The greatest advantage of remote sensing over conventional measurements lies in the opportunity to carry out detailed spatio-temporal analysis of land and ocean features on a very frequent basis. This paper analyses the contribution of satellite imagery to atmospheric, geophysical and ocean studies and management in West Africa since the early 1980s. The detailed application of data from optical sensors (e.g. Meteosat, NOAA/AVHRR, SPOT, Landsat TM, etc.) for weather prediction, hydrogeological, landuse/cover and cartographic studies has been acknowledged. However, the use of microwave (e.g. SAR) and optical data for ocean monitoring and studies in the sub-region is still very limited. Even though sufficient remote sensing expertise and infrastructure is...
Tipo: Conference Material Palavras-chave: Remote sensing.
Ano: 2002 URL: http://hdl.handle.net/1834/654
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Report of the First ODINAFRICA - II Ghana National Workshop OceanDocs
Quartey, R.; Yaqub, H.B.; Dovlo, E.K.; Amartey, P.N.A.; Koranteng, K.A.; Amador, K..
The first ODINAFRICA-II National Workshop was held at the auditorium of the Science and Technology Policy Research Institute (STEPRI), Accra, Ghana on 15th and 16th August 2002. The aims of the workshop were to: Launch the ODINAFRICA II project in Ghana, inaugurate the National Oceanographic Data and Information Centres (GODC), update information available on the oceanographic activities of institutions and organizations in Ghana, adopt Data Policies and Procedures, and define the roles and responsibilities of the GODC.
Tipo: Report Palavras-chave: Oceanographic data; Oceanography; Oceanographic institutions; Information management; Data management; Oceanography; Http://aims.fao.org/aos/agrovoc/c_49838; Http://aims.fao.org/aos/agrovoc/c_9000179; Http://aims.fao.org/aos/agrovoc/c_12889.
Ano: 2002 URL: http://hdl.handle.net/1834/244
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Sardinella market trends in the West African sub-region IRD
Tettey, E.; Koranteng, K.A..
Les Sardinelles pêchées surtout au Ghana et en Côte d'Ivoire sont une composante importante du commerce de poisson vivrier en Afrique de l'Ouest. Ce document examine les apports, les flux de Sardinelles et l'évolution des prix au cours des années récentes. La conclusion est que la Sardinelle reste la source la moins onéreuse de protéines animales dans la région d'Afrique de l'Ouest et que des améliorations des conditions de commercialisation sont possibles. (Résumé d'auteur)
Tipo: Text Palavras-chave: POISSON MARIN; ESPECE PELAGIQUE; ABONDANCE; VARIATION SAISONNIERE; ECONOMIE DES PECHES; COMMERCIALISATION; PRIX; FLUCTUATION; DONNEES STATISTIQUES; POISSON FUME.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:42105
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Seasonal and Long-Term Changes in the Distribution and Abundance of Demersal Fishery Resources in Continental Shelf Waters off Ghana, West Africa OceanDocs
Koranteng, K.A..
Between 1963 and 1990, the abundance of demersal fishery resources in Ghana’s shelf waters underwent significant changes whereby the relative importance of major species changed in every trawl survey conducted in the area. Triggerfish (Balistes capriscus) dominated this ecosystem for nearly twenty years (from early 1970s to late 1980s) displacing bigeye grunt (Brachydeuterus auritus) as the most abundant species.The density of all demersal species (excluding triggerfish) assessed in bottom trawl surveys decreased from 50 kg ha-1 in 1963-64 to 32.4 kg ha-1 in 1990. The lowest density of 22.5 kg ha-1 occurred between 1973 and 1977. Density of triggerfish was high between 1973 and 1982, reaching a value of 28 kg ha-1 between depths of 30 and 50 m. Its...
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; Trawls; Fishery surveys.
Ano: 2001 URL: http://hdl.handle.net/1834/241
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Some aspects of the sardinella fishery in Ghana IRD
Koranteng, K.A..
Tipo: Text Palavras-chave: PECHE COTIERE; PECHE ARTISANALE; MILIEU PELAGIQUE; SARDINELLE; FACTEUR CLIMATIQUE; OCEANOGRAPHIE BIOLOGIQUE; STOCK.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:36297
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Statistical analysis of canoe fishery data in Ghana with particular reference to sardinellas IRD
Ferraris, Jocelyne; Koranteng, K.A..
Cette communication confronte les données des enquêtes-cadres sur la pêche artisanale au Ghana avec celles des recensements mensuels effectués sur les plages suivies pour l'échantillonnage des captures et des efforts. Les enquêtes-cadres mettent en évidence le phénomène de migration interne et externe et une modification dans la structure de la flottille : une augmentation des pirogues à filets fixes est observée en parallèle à la diminution des pirogues à filets ali/poli/watsa. La baisse de fréquence de ces pirogues dans la région de Greater Accra, alors qu'elles augmentent dans la partie ouest du pays, est confirmée par les recensements mensuels. L'étude des profils temporels des sites avec les plus grosses fluctuations du nombre de pirogues révèle une...
Tipo: Text Palavras-chave: PECHE ARTISANALE; ENQUETE; PIROGUE; MIGRATION; ABONDANCE; VARIABILITE; ANALYSE STATISTIQUE.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:42090
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Study of the structure and dynamics of demersal fish assemblages on the continental shelf and upper slop off Ghana, West Africa OceanDocs
Koranteng, K.A..
Using two-way indicator species analysis and detrended correspondence analysis, species on the continental shelf and upper slope of Ghana were classified into six assemblages. The structure of the assemblages is determined primarily by depth and type of sediment on the seabed. There are clear faunal discontinuities around 30-40 m, 100 m and 200 m depth. The dynamics of the assemblages are influenced by physico-chemical parameters of the water masses, mainly temperature, salinity and dissolved oxygen which are periodically modified by the seasonal coastal upwelling that occurs in the area. The observed changes in the composition and relative importance of species in the assemblages can be related to increased fishing activity and environmental forcing.
Tipo: Journal Contribution Palavras-chave: Species assemblages; Ghana; Slop; Structure and dynamics; Demersal fish; Continental shelf.
Ano: 1998 URL: http://hdl.handle.net/1834/234
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The Ghanaian fishery for sardinellas IRD
Koranteng, K.A..
La pêcherie de Sardinelle du Ghana est des plus importante activité économique du pays. La nature de la pêcherie et le comportement, abondance et distribution des sardinelles a subi des changements depuis le début de la pêcherie. De grandes variations dans les apports ont été observées et en certaines années la pêcherie a atteint des niveaux proches d'un effondrement. (Résumé d'auteur)
Tipo: Text Palavras-chave: PECHE ARTISANALE; SARDINELLE; ESPECE PELAGIQUE; ENGIN PECHE; SAISON; UPWELLING; EFFORT DE PECHE; PRODUCTION HALIEUTIQUE; VARIATION INTERANNUELLE; DONNEES STATISTIQUES; DYNAMIQUE DES FLOTTILLES.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:42093
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Tuna bait boat baiting time and the availability of anchovy in Ghanaian waters IRD
Kwei, E.A.; Koranteng, K.A.; Bannerman, P.O..
Ce document examine la durée des opérations de capture des anchois qui constituent l'appât vivant des thoniers canneurs ghanéens. La durée de ces opérations n'a pas augmenté significativement lors des années 1986-1992. Lors de la même période le rendement (cpue) des pirogues exploitant les anchois a nettement augmenté. Il ne semble pas qu'il y ait eu un changement dans la distribution spatio-temporelle des anchois dans les eaux côtières ghanéennes. En conséquence il semble que l'accroissement supposé du pourcentage de temps destiné à faire l'appât soit lié à d'autres facteurs que la disponibilité de l'anchois. (Résumé d'auteur)
Tipo: Text Palavras-chave: PECHE MARITIME; POISSON MARIN; NAVIRE DE PECHE; THONIER; CANNEUR; TECHNIQUE DE PECHE; APPAT; EFFORT DE PECHE; RENDEMENT; ANALYSE STATISTIQUE; ANALYSE DE VARIANCE; ANCHOIS.
Ano: 1995 URL: http://www.documentation.ird.fr/hor/fdi:42095
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Two interdisciplinary workshops in the Gulf of Guinea OceanDocs
Koranteng, K.A..
As part of the activities under an EU-funded INCO-DC fisheries research project, a workshop was organised in Accra, Ghana on 27-29 July 1998 on fisheries management in the Gulf of Guinea. INCO stands for International Science and Technology Cooperation with developing countries and is part of the EU Framework Programme on Science and Technology. The INCO-DC project “Impacts of environmental forcing on marine biodiversity and sustainable management of artisanal and industrial fisheries in the Gulf of Guinea” is a collaborative research between the Marine Fisheries Research Division (Ministry of Food and Agriculture, Ghana), the Centre for Coastal and Marine Sciences (CCMS/NERC)/Ecosystems Analysis and Management Group (University of Warwick, U.K.) and the...
Tipo: Journal Contribution Palavras-chave: Fishery management; Simcoast; Acp-eu fisheries research initiative; Gulf of guinea; Ghana; Acp Marine biology Biodiversity Sustainable management Artisanal fishing Fishery industry Sustainable development http://aims.fao.org/aos/agrovoc/c_35332.
Ano: 1998 URL: http://hdl.handle.net/1834/445
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Variability and trends in some environmental time series along the Ivoirian and the Ghanaian coasts IRD
Koranteng, K.A.; Pezennec, Olivier.
Depuis 1966, les changements observés dans l'écosystème de Côte-d'Ivoire-Ghana sont décrits. Cet écosystème, aux caractéristiques spécifiques, apparaît comme unique dans l'ensemble plus vaste que représente l'écosystème du courant de Guinée auquel il appartient. L'analyse de différents jeux de données de température montrent que les deux upwellings saisonniers qui se produisent dans cet écosystème ont vu leur intensité changer, d'où résulte un moindre contraste entre leurs intensités respectives. L'intensité des pluies a décru tandis que celle des vents s'est accrue. Certains de ces changements environnementaux sont à mettre en parallèle avec des changements plus globaux. (Résumé d'auteur)
Tipo: Text Palavras-chave: ECOSYSTEME; UPWELLING; VARIATION TEMPORELLE; PLUIE; VENT; SERIE CHRONOLOGIQUE.
Ano: 1998 URL: http://www.documentation.ird.fr/hor/fdi:010015308
Registros recuperados: 17
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