|
|
|
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
|
