http://hdl.handle.net/1834/141 Wed, 15 May 2013 07:20:57 GMT 2013-05-15T07:20:57Z http://hdl.handle.net/1834/1266 Title: Improvements in the Ghanaian tuna statistics system Authors: Quartey, R.; Bannerman, P. Abstract: Light fishing operations (LFO) in Ghana is concentrated in the three major coastal municipalities of Greater Accra (Tema), Central (Mumford & Elmina) and Western (Sekondi) Regions; these areas have the port facilities for landing of the catch by the larger inshore vessels that operate the purse seine fishery in Ghana and which predominantly operate the light attraction. Currently there are about 250 registered inshore vessels in the country whose sizes range between 39 – 60 feet , only a small fraction are actually working at the moment due to problems with spare parts and operations. Light attraction is the technique of aggregating fish by artificial light; and light fishing is the process of fishing the attracted fish by hooking, gill-netting or by any other gear (P.P. Dinglasan, 1972). The light source may be by means of a fire torch, pressure kerosene lamp, gas lit lamp and battery or generator assisted incandescent lamp (FAO Training Series, 1988). Currently the light fishing operations in Ghana use mainly the purse seine gear with a small size generator powering the incandescent lamp. They are minimally mechanized using fish finders, a two-way radio for communication and a diesel driven winch drum to facilitate the search and hauling of the catch. Sat, 01 Jan 2005 00:00:00 GMT http://hdl.handle.net/1834/1266 2005-01-01T00:00:00Z http://hdl.handle.net/1834/1267 Title: Obervations on the commercial light fishing operation in Ghana Authors: Quartey, R.; Bannerman, P. Abstract: Light fishing operations (LFO) in Ghana is concentrated in the three major coastal municipalities of Greater Accra (Tema), Central (Mumford & Elmina) and Western (Sekondi) Regions; these areas have the port facilities for landing of the catch by the larger inshore vessels that operate the purse seine fishery in Ghana and which predominantly operate the light attraction. Currently there are about 250 registered inshore vessels in the country whose sizes range between 39 – 60 feet , only a small fraction are actually working at the moment due to problems with spare parts and operations. Light attraction is the technique of aggregating fish by artificial light; and light fishing is the process of fishing the attracted fish by hooking, gill-netting or by any other gear (P.P. Dinglasan, 1972). The light source may be by means of a fire torch, pressure kerosene lamp, gas lit lamp and battery or generator assisted incandescent lamp (FAO Training Series, 1988). Currently the light fishing operations in Ghana use mainly the purse seine gear with a small size generator powering the incandescent lamp. They are minimally mechanized using fish finders, a two-way radio for communication and a diesel driven winch drum to facilitate the search and hauling of the catch. Sat, 01 Jan 2005 00:00:00 GMT http://hdl.handle.net/1834/1267 2005-01-01T00:00:00Z http://hdl.handle.net/1834/3204 Title: Structure and Dynamics of demersal assemblages on the continental shelf and upper slope off Ghana, West Africa Authors: Koranteng, K.A Abstract: Using two-way indicator species and detrended correspondence analysis, species on the continental shelf and upper slope of Ghana were classified into 6assemblages. 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, 100, and 200m 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. Mon, 01 Jan 2001 00:00:00 GMT http://hdl.handle.net/1834/3204 2001-01-01T00:00:00Z http://hdl.handle.net/1834/1265 Title: Diversity and stability of demersal species assemblages in the Gulf of Guinea Authors: Koranteng, K.A. Abstract: 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 potential to cause environmental changes pose a threat to biodiversity in continental shelf waters of the Gulf of Guinea. industrial trawling in coastal waters and environmental forcing conjointly influenced the changes in the composition and relative importance of species in the assemblages. Mon, 01 Jan 2001 00:00:00 GMT http://hdl.handle.net/1834/1265 2001-01-01T00:00:00Z