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| Awosika, L.F.; Folorunsho, R.; Isebor, C.; Adegbie, A.T.; Dublin-Green, C.O.. |
| At the request of the United States of America Centre for Marine Conservation, the Nigeria Institute for Oceanography and Marine Research organised a beach clean up at the Bar Beach Lagos on September 24 1994. An International beach clean up is usually held on the last Saturday of every September during the COASTWEEK. On this day, volunteers all over the world participate in a beach clean up in an effort to collect data and information on the types and amounts of debri littering the world's beaches. Volunteers for the Bar Beach clean up of 1994 were drawn from all works of life and some Federal and States agencies. A total of 10,872 pieces of different kinds of debri weighing 531.1kg were collected during the clean up. Further analysis of the different... |
| Tipo: Report |
Palavras-chave: Beach accretion. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/2409 |
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| Dublin-Green, C.O.. |
| A seasonal study of the diversity of benthic foraminifera in the Bonny estuary was carried out at ten Stations located at various zones in the estuary. Four diversity indices, species number[S], Fisher & shannon Wiener function H(S) Equitability (E) were employed in the analysis. Examination of the spatial distribution and seasonal variations of these indices provided information on the responses of the foraminiferal fauna pollution. Diversity indices, S& and H(s) were found to be consistently low at station 5 (NNPC Refinery jetty Okrika). The dominance of pollution – tolerant species such as Ammotium salsum, Miliammina fusca and Ammonia beccarii at this station was also observed. The loe diversity indices recorded at station 5 is attributed to... |
| Tipo: Report |
Palavras-chave: Pollution monitoring; Pollution indicators. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/2430 |
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| Dublin-Green, C.O.. |
| This study is based on eight research cruises carried out on the bonny river system from December 1986-september 1988. Variations in some physico-chemical parameters of water [Transparency, temperature, pH, DO, salinity, conductivity, PO4, NH4 SiO2 and alkalinity] observed at 10 stations located in the main channel of the river are presented. Results showed that salinity, conductivity, pH, DO, and alkalinity exhibited spatial and temporal variations. In general, the upper estuary was slightly acidic while the middle and lower estuary were alkaline .A slight decrease in water temperature with depth was observed in most of the stations. The amplitude of variation in surface and bottom water temperature was generally between 0.5-2oC. Significant salinity... |
| Tipo: Report |
Palavras-chave: Physicochemical properties; Seasonal variations; Physicochemical properties. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2408 |
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| Dublin-Green, C.O.. |
| Forty-eight bottom sediments samples collected from the Bonny estuary were analyzed for textural Characteristics and organic carbon content. The dominant lithologies are sand, sandy mud, mud, sandy clay and clay. Pattern of sediment distribution consists of mud, sandy mud and clay in the swallow marginal areas of the river channel and creeks, while the channel centers are predominantly fine to coarse sand with graphic mean size ranging from 0.74 to 2.71Ø. Inclusive standard deviation values ranged from 0.35 to 1.64Ø suggesting the poorly to very well sorted nature of these sediments. Skewness varied from fine skewed to strong coarse skewed with 52% of the samples negatively skewed. Graphic kurtosis ranged from 0.92 to1.95 [mesokurtic to very leptokurtic].... |
| Tipo: Report |
Palavras-chave: Sediment analysis; Sedimentation; Sedimentation; Http://aims.fao.org/aos/agrovoc/c_6926. |
| Ano: 1985 |
URL: http://hdl.handle.net/1834/2411 |
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| Dublin-Green, C.O.. |
| The effect of oil exploration, production and other oil related industrial activities on the estuarine environment of the Niger Delta has resulted in increasing need of baseline information to be used as background levels against which pollution effects could be detected and monitored. A one-year (December, 1986 - December, 1987) baseline survey of the benthic foraminiferal fauna of the Bonny estuary showed that arenaceous forminifera strongly dominated the total and living assemblages. The subordinate calcareous groups were mostly found in the lower reaches of the estuary. The foraminiferal fauna was represented by thirty-three species, twenty-three of which were arenaceous, nine calcareous and one porcellaneous. Twenty nine of the thirty-three species... |
| Tipo: Report |
Palavras-chave: Fauna; Foraminifera; Fauna; Http://aims.fao.org/aos/agrovoc/c_2821. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2431 |
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| Dublin-Green, C.O.. |
| This study is based on eight research cruises carried out on the bonny river system from December 1986-september 1988. Variations in some physico-chemical parameters of water [Transparency, temperature, pH, DO, salinity, conductivity, PO4, NH4 SiO2 and alkalinity] observed at 10 stations located in the main channel of the river are presented. Results showed that salinity, conductivity, pH, DO, and alkalinity exhibited spatial and temporal variations. In general, the upper estuary was slightly acidic while the middle and lower estuary were alkaline .A slight decrease in water temperature with depth was observed in most of the stations. The amplitude of variation in surface and bottom water temperature was generally between 0.5-2oC. Significant salinity... |
| Tipo: Report |
Palavras-chave: Physicochemical properties; Seasonal variations; Physicochemical properties; Http://aims.fao.org/aos/agrovoc/c_13330. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2408 |
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| Dublin-Green, C.O.; Ojanuga, A. G.. |
| Actual and potential acid sulfate soils cover over 750,000 ha. of unclassified wetlands in the mangrove swamp of the Niger Delta. This belt serves many functions including aquaculture development. Presently a number of brackish water aquaculture projects are sited on these soils. In acid sulfate soils, an acidic condition usually develops due to oxidation of the sulfidic materials (e.g. Iron Sulfides) in the soils. Elements such as iron and aluminum are released to pond water in large quantities, while essential nutrients like phosphorus and nitrogen become fixed in the soil and thus are unavailable to the larger community. Acid sulfate soils pose a range of problems for brackish water aquaculture- including, slow fish growth, low fish yields and mass... |
| Tipo: Report |
Palavras-chave: Aquaculture development; Brackishwater aquaculture. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/2391 |
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