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  • 1
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    Heavy metals concentrations in Chrysichthys nigrodigitatus in Arakanga Reservoir, Abeokuta, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24218 | 19325 | 2018-05-19 06:58:26 | 24218 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigates the morphometric and meristic features of Chrysichthys nigrodigitatus in relations to heavy metal concentrations. Varying sizes of Clarias nigrodigitatus were obtained with the help of fisher-folks, from Arakanga reservoir Ogun state, Nigeria. Water samples were also collected alongside with fish samples per week and five of the samples were sent to laboratory for analysis to determine the presence of four heavy metals in both fish and water. Lead, Cadmium, Nickel and Arsenic were investigated by atomic absorption spectrophotometer (AAS). Four tissues; gills, kidney, liver and muscle were compared with the level of metals in the water. Lower concentrations of metals were recorded in water except for Cadmium which is higher, than in fish. Lower concentration of heavy metals found in fish and water was less than that recommended by the World Health Organisation (WHO's) guideline for maximum concentration recorded in the tissue of the samples. Lead was found to be dominant in the gills of C. nigrodigitatus, while Cadmium was found to be highest in the water sample from Arakanga reservoir. There is significant difference (P〈0.05) in Nickel and Arsenic concentration in the tissues of C. nigrodigitatus and water. It was concluded that though the heavy metals of interest were present in measurable quantities, they were still within safe limits for consumption.
    Description: Includes: 11 references.
    Keywords: Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Ogun State ; Arankanga reservoir ; freshwater environment ; Heavy metals ; Freshwater fish ; Reservoir fisheries ; Artisanal fishing ; Lead ; Toxicants ; Pollution effects ; Quality assurance ; Morphometry ; Meristic counts ; Water analysis ; Freshwater pollution ; Nickel ; Arsenic ; Cadmium ; Fish consumption ; Health and safety
    Repository Name: AquaDocs
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    Format: 265-268
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  • 2
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    Environmental impact of crude oil spillage at Agoubiri community in Southern Ijaw local government area of Bayelsa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24228 | 19325 | 2018-05-19 07:18:46 | 24228 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Assessment of the result of crude oil spillage that occurred at Aguobiri Community in Southern Ijaw Local Government Area of Bayelsa State in 2007, is presented in this paper. The results of the laboratory analysis of water samples for Total Hydro carbon content (THC) was 1.56mg/l, 2.94mg/l and 23.96mg/l at 300m,200m and 9m respectively from the spill point. Heavy metals values in plant tissues were Vanadium-2.1 4mg/kg, Nicke-4.06mg/kg and THC of 09,309.5mg/kg at 300m from the spill point. The values of heavy metals in soil samples were Vanadium 2.14mg/kg and Nickel4.19mg/kg and THC of 133,886.20mg/kg at 300m from the spill point. This is to buttress the fact that oil spill is not limited to the site of occurrence but spreads to affect flora life far away from the spill point. Consequently, this negatively impacts farming and fisheries activities in such areas.
    Description: Includes: 9 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Bayelsa State ; Crude oil spill ; Heavy metals ; Total Hydrocarbon ; Aguobiri ; freshwater environment ; Environmental impact ; Crude oil ; Oil spills ; Heavy metals ; Fisheries
    Repository Name: AquaDocs
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    Format: 304-306
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  • 3
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    Influence of uptake route on the bioconcentration of polycyclic aromatic hydrocarbon (PAH) by the Red Sea bream (Pagrus major) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24244 | 19325 | 2018-05-20 05:41:08 | 24244 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species have different responses to polycyclic aromatic hydrocarbons (PAHs) exposure to crude oil. Some achieve PAH biotransformation while others have bioconcentration. These trends may be specie-specific and may depend on PAH uptake route - through water or food. PAH uptake in the red sea bream, Pagrus major for PAH biomonitoring in Asian oil spill waters was assessed in water-borne and dietary exposures of the fish to four representative PAHS. In the water-borne exposure, juvenile fish of average weight 83g were exposed in a flow-through toxicity test for ten (10) days to a mix of 30~kg/L phenanthrene, pyrene, and chrysene; 3~kg/L of benzo[a] pyrene (B[a]P). In the dietary exposure, 20 juveniles of average weight 80g were fed diets with 10 n g/g phenanthrene, pyrene and chrysene, and 2 n g/g of B[a]P for ten days. Fish livers were sampled for PAH concentrations on days 0, 2, 5 and l0 in both exposures. Phenanthrene PAHs were accumulated in the water-borne exposure with concentrations increasing with duration of exposure. Phenanthrene had the highest concentration of 2210 ng/g on day 10, while pyrene and chrysene were 170 and 45 ng/g respectively. B[a]P was not accumulated. ln the dietary exposure, all the test PAHs were accumulated. Bioconcentration decreased with duration of exposure, unlike in the water-borne exposure which was the reverse. Phenanthrene, with an initial 58 ng/g concentration, was reduced to 10.6 ng/g on day 10. B[a]P accumulation in the dietary exposure is significant. PAH accumulation was higher in the water-borne exposure than in the dietary exposure and PAH bioconcentration in the fish depends on uptake route.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Pollution ; Pagrus major ; Nigeria ; Makurdi ; freshwater environment ; Aromatic hydrocarbons ; Freshwater fish ; Crude oil ; Bioaccumulation ; Response analysis ; Biomanipulation ; Pollution monitoring ; Controlled conditions ; Toxicity tests ; Oil pollution
    Repository Name: AquaDocs
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    Format: 364-366
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  • 4
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    Fish species composition/diversity of the Warri River, Niger Delta Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24240 | 19325 | 2018-05-20 05:30:49 | 24240 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Changes in water quality caused by industrialization and technological advancement, affect fishery resources. The Warri River like many other water bodies in Niger Delta, Nigeria are experiencing side effects in terms of pollutant build up cum destruction of fishery resources. This study investigated the fish species composition/diversity of the river in comparison to the baseline studies of previous researchers. Nine sampling locations were chosen including, Jeddo, NNPC Jetty, Nigeria ports Authority jetty, Main Warri market, Delta Steel Jetty, Shell Ramp, Udu Bridge/market Ugbolokposo and Agbarho.Fish species were collected from the respective nine Locations monthly for 24 months. Fish were obtained from landings of local fishermen every fortnight with prior arrangement. Highest diversity index of 3.48 occurred at shell Ramp/Globestar, while the least value of 2.63 was recorded at NNPC Jetty. The condition factor of most fish species in the study were above 1.0, though more species were better conditioned in location 1 (Jeddo). The catfish families probably due to their hardy nature were best conditioned of all families represented. Thirty four fish species recorded in this study compared to 91 species obtained in previous works of 1989 -1994 reflects a sharp drop in species diversity.
    Description: Includes: 18 references.
    Keywords: Fisheries ; Pollution ; Nigeria ; Warri River ; Fisheries resources ; Warri River ; Specie diversity ; Pollutants ; Niger Delta ; freshwater environment ; Fish ; Check lists ; Species diversity ; Water quality ; Industrialization ; Fishery resources ; Pollutants ; Condition factor ; Baseline studies ; Aquaculture development ; Technology transfer
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 349-352
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  • 5
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    Assessment of some heavy metals pollution in Clarias gariepinus in the vicinity of Lake Chad, Nigerian sector, using energy dispersive X-ray fluorescence (EDXRF) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24243 | 19325 | 2018-05-20 05:39:07 | 24243 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Globally, aquatic ecosystems are highly polluted with heavy metals from anthropogenic and terrigenous sources. The objectives of this study, is to portray the use of EDXRF for the analysis of heavy metal pollution in Clarias gariepinus. C. gariepinus were collected from Dumba, Lake Chad, Nigerian sector and analyzed with EDXRF with 〈sup〉109〈/sup〉Cd as excitation source of the samples. The concentrations of Cadmium, Chromium, Copper, Manganese, Iron, Lead and Zinc (Cd, Cr, Cu, Mn, Fe, Pb and Zn) in mg/kg were determined in C. gariepinus and were compared with World Health Organization (WHO, 1985) and Federal Environmental Protection Agency (FEPA, 2003) to ascertain the level of Cd, Cr, Cu, Mn, Fe, Pb and Zn in C. gariepinus from Dumba. The results indicated that C. gariepinus is polluted with Cr, Cu, Mn, and Pb when compared with permissible limit of WHO, 1985 and FEPA, 2003. Therefore, the consumption of C. gariepinus from Dumba may pose a health risk.
    Description: Includes: 12 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Borno ; Chad L. ; freshwater environment ; Heavy metals ; Pollutants ; Freshwater fish ; X-ray fluorescence analysis ; Standards ; Acceptability ; Pollution effects ; Cadmium ; Chromium ; Copper ; Manganese ; Iron ; Lead ; Zinc
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 361-363
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  • 6
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    The effects of heavy metals concentration in some commercial fish in Ogun River, Opeji, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24219 | 19325 | 2018-05-19 07:00:18 | 24219 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on commercially important fish species of heavy metals in water bodies, The primary objectives were to find out the amount of heavy metals concentration in the fish species, sediments and water samples at the deep and shallow part of the river, to determine the toxicity and relationship between the collected samples and the rate at which it pollutes the water. Atomic Absorption Spectrophotometer (AAS) evaluate their wholesomeness for human consumption. Four heavy metals (Lead, Cadmium, Copper and Zinc) were analysed and only Copper and Zinc were found to be present in the digested samples. The concentration of Copper in the fish (flesh) is 0.09mg/l and that of Zinc is 0.25mg/l. In the bone samples, Copper was found to have 0.17mg/l and Zinc to be 0.22mg/l. In the water samples analyzed, the concentration of Copper is 0.035mg/1 while that of Zinc is 0.047mg/l. In the sediment sample, the amount of Copper is 310.0mg/kg while that of Zinc is 20.50.0mg/kg. This however signifies that the fish species in the Ogun River as well as the water is suitable for consumption which was found to be less than the World Health Organization (WHO's) maximum recommended acceptable limits in the food.
    Description: Includes: 7 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Ogun R. ; freshwater environment ; Heavy metals ; Pollution effects ; Freshwater fish ; Fisheries ; Toxicity ; Pollutants ; Quality assurance ; Commercial species ; Sediment pollution ; Water analysis ; Lead ; Cadmium ; Copper ; Zinc ; Freshwater pollution ; Health and safety
    Repository Name: AquaDocs
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    Format: 268-271
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  • 7
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    Trace metals in water, fish and sediments from Elechi Creek, Port Harcourt, River State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24220 | 19325 | 2018-05-19 07:02:08 | 24220 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The concentration of trace metals: Cadmium (Cd), Lead (Pb), magnesium (Mn), Nickel (Ni) and Zinc (Zn) were determined in water, sediment and fish tissues (S. melanotheron) collected from Elechi creek in Port Harcourt, Nigeria between October and November, 2010. The overall mean concentrations of the trace metals (Mg/g dry weight) in all combined samples ranged from 0.06-0.24 (Cd), 0.59-2.39 (Pb), 0.08-1.15 (Mn), 0.15-0.48 (Ni) and 0.18-7.04 (Zn) respectively. The concentration of the trace metals in water, fish and sediments were in the following order: Pb 〉Ni 〉Zn〉Cd 〉Mn; Zn〉Pb 〉Mn〉Ni 〉Cd and Zn〉 Pb〉Mn〉Ni〉Cd respectively. Except in water, Zinc had the highest value while cadmium had the lowest value. Mn concentration in fish tissue was greater than WHO/FAO certified values. Correlation coefficients between pairs of metals concentration show that all metals positively correlate except Cadmium and Nickel. Elechi creek is not heavily burdened with metals, but aquatic environment should be monitored periodically to avoid excessive intake of trace metals by human.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Limnology ; Pollution ; Sarotherodon melanotheron ; Nigeria ; Elechi Creek ; Trace metals ; Elechi Creeks ; S. Melanotheron ; Sediments ; brackishwater environment ; Trace metals ; Pollutants ; Pollution effects ; Pollution monitoring ; Water analysis ; Brackishwater fish ; Sediment pollution ; Brackishwater pollution ; Heavy metals ; Lead ; Cadmium ; Zinc ; Nickel ; Magnesium
    Repository Name: AquaDocs
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    Format: application/pdf
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    Format: 271-274
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  • 8
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    Influence of physico-chemical parameters on the distribution of freshwater snails in River Uke, Nassarawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24213 | 19325 | 2018-05-19 06:48:43 | 24213 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Physio-Chemical parameters of River Uke, Keffi, Nasarawa State, were studied between the months of February to August 2011. Nine water parameters were analyzed and Melanoides tuberculata was also identified using identification keys by Brown and Kristensen (1993). These include temperature, pH, alkalinity, turbidity, conductivity, nitrates, phosphates, total dissolved substances and dissolved oxygen using the methods described by Boyd (1979). The temperature ranged between 25~'C - 27.5~'C (mean = ~c 26.31~'C), while pH ranges between 6.3 and 7.5(mean = ~c 6.89). The highest value obtained for alkalinity was I5.4mg L-1, while the lowest was 4mgL-1(mean = ~c 10.2mg L-1). Dissolved oxygen concentration value was between 4.lmgL-1, and 8.6mgL-1(mean = ~c 6.35mgL-1), the turbidity in dry season range between 50 to 60 cm and in rainy season, it ranged between 4 to 7 cm. The total dissolved substances range between 40ppm and 200ppm. The conductivity value ranged between 80~ks/cm and 400~ks/cm. An extreme high concentration of phosphate was recorded and ranged between 0.9mL-1 and 4.2mg L-1, which was due to water and land use practice. The nitrate concentration was negligibly low with concentration between 0.00% and 0.15%. This concentration was however adequate and support fish population and freshwater snails such as Melanoides tuberculata.
    Description: Includes: 12 references.
    Keywords: Biology ; Limnology ; Pollution ; Nigeria ; Nassarawa State ; Uke River ; Freshwater snails ; freshwater environment ; Physicochemical properties ; Rivers ; Water quality ; Water properties ; Aquatic environment ; Temperature ; Dissolved oxygen ; Alkalinity ; Turbidity ; Nitrates ; Phosphates ; Geographical distribution
    Repository Name: AquaDocs
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    Format: application/pdf
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    Format: 246-249
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  • 9
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    Histopathological and haematological effects of acute toxicity of cypermethrin on Clarias gariepinus juvenile (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24233 | 19325 | 2018-05-19 07:27:47 | 24233 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The experiment was conducted to evaluate the acute toxic of cypermethrin, a synthetic pyrethroids on juveniles of Clarias gariepinus. The effect was assessed based on the comparism results of haematology and histopathological tissues examinations of control and experimental group exposed to five nominal concentration of cypavest, 10EC Pesticide Preparation (active substance 100mg/l) of cypermethrin in a static non-renewal bioassay for 96 hours. The 96hrs LC50 value of the exposed juveniles was found to be 0.062 mg/1. Fish exhibited progressive loss of balance, respiratory distress, erratic movement and death. Examination of haematology significantly showed higher value (P〈0.001; 0.01) of white blood cell (WBC), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), packed cell volume (PCV), monophilis and heterophilis; a significant reduction (P〈0.001, 0.01) in Red Blood Cell (RBC) and Lymphocyte was obtained as compared to the control. Severe necrosis, haemorrhages vacuolation, congestion and focal interstitial haemorrhages were the stopathological changes in the tissues of gill and liver, thus concluding that cypermethrin is toxic to juveniles of Clarias gariepinus.
    Description: Includes: 17 references.
    Keywords: Pollution ; Aquaculture ; Clarias gariepinus ; Nigeria ; Borno State ; Cypermethrin ; cypavest ; Synthetic pyrethroid ; Static-non renewal ; bioassay ; freshwater environment ; Histopathology ; Haematology ; Toxicity ; Freshwater fish ; Juveniles ; Pollution effects ; Evaluation ; Comparative studies ; Experimental research ; Bioassays ; Toxicants ; Pesticides
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 322-326
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  • 10
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    The effects of crude oil on the population structure of plankton (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24237 | 19325 | 2018-05-20 05:23:42 | 24237 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of crude oil on the population structure of plankton in water samples collected from a fish pond at the African Regional Aquaculture Centre, Aluu, was investigated for a period of four weeks. The samples were analyzed initially for species composition, community structure, population density and water quality. The samples were divided into five different tanks after which crude oil was introduced into the test tanks. The data showed that exposure to crude oil significantly reduced the population density of the plankton, altered the species composition, community structure and some of the water quality variables in the experimental tanks. In the control, pH values dropped from 6.61 to 6.05 in the 1.0 and 2.0ml/L tanks respectively. Oxygen values decreased from 7.5 to 5.78 in the control and to 5.34 and 5.16 in the 1.0 and 2.0ml/L tanks respectively. Temperature values were relatively stable in all the tanks. Exposure to crude oil caused a reduction in the number of phytoplankton genera from 19 to 12 and from 19 to 11 in the 1.0 and 2.0ml/L tanks respectively. Similarly, zooplankton genera decreased from 8 to 5 in the 1.0ml/L tank but increased from 8 to 9 in the 2.0ml/L tank. The genera eliminated by the crude oil include Cosmarium spp, Euglena and Navicula dicephela. The effects of crude oil on plankton therefore are tied to the amount of crude oil spilled.
    Description: Includes: 8 references.
    Keywords: Ecology ; Pollution ; Cosmarium ; Euglena ; Navicula dicephela ; Nigeria ; Port Harcourt ; Water quality ; Pollution ; Biodiversity ; Abundance ; freshwater environment ; Crude oil ; Pollution effects ; Plankton ; Water samples ; Fish ponds ; Water quality ; Check lists ; Population density ; Population structure
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 339-342
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