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  • Pollution  (55)
  • Chemistry
  • LUNAR AND PLANETARY EXPLORATION
  • SPACE SCIENCES
  • bic Book Industry Communication::M Medicine::MJ Clinical & internal medicine::MJG Endocrinology
  • thema EDItEUR::P Mathematics and Science::PH Physics::PHF Materials / States of matter::PHFC Condensed matter physics (liquid state and solid state physics)
  • FISON  (65)
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  • 1
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    Proximate composition and amino acids profile of smoked catfish Clarias gariepinus and tilapia Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23226 | 19325 | 2018-03-18 14:51:17 | 23226 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-13
    Beschreibung: The proximate composition and amino acids assay of smoked Clarias gariepinus and Oreochromis niloticus were determined using standard procedures. The mean proximate composition of Oreochromis niloticus are 8.9% moisture, 16.00% lipids, 5.6% ash, 44.5% crude protein, 0.42% crude fiber and 24.9% NFE while Clarias gariepinus has 8.19% moisture, 15.55% lipids, 4.725 ash, 40.46% crude protein, 0.50% crude fiber and 30.58% NFE. There is therefore a nutrient variation between the 2 species of fish Oreochromis niloticus has higher crude protein, lipids, moisture and ash content than Clarias gariepinus.The amino acids profile shows that both fishes have 17 amino acids. Apart from Tryptophan, the following essential amino acids Histidine, Methionine, Threonine, Isoleucine, Leucine, Lysine, Valine and Phenylalanine are present in both fish. Oreochromis niloticus however has higher quantities of the essential amino acids except for Histidine than Clarias gariepinus
    Beschreibung: Includes:- 2 tables.;2 figs.;7 refs.
    Schlagwort(e): Chemistry ; Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Amino acids ; Ash content ; Lipids ; Organic compounds ; Moisture ; Proteins
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 91 - 95
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  • 2
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    Bacteriological quality of water and fish samples from Kainji Lake and the effect of animal and human activities (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23242 | 19325 | 2018-03-25 12:34:41 | 23242 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-13
    Beschreibung: Kainji Lake is a man-made Lake and is impounded in 1968 to generate hydroelectric power. The Lake also offers opportunities for developmental projects like Fisheries and Irrigation. Lake Kainji receives organic waste through husbandry operations in which the cattle defecate into and around the bank of the Lake. Other sources of pollution include runoff from farms, bathing and washings in the Lake. Surrounding villages e.g. Tarda and Musawa used the Lake as source of raw drinking water and also for other domestic purposes. Bacteriological quality of fish and water from the Lake is carried out as well as that of cow dung by using primary isolation media and biochemical analysis. Physico-chemical parameters of water from the Lake is also determined. Total viable bacteria count and total coliform count of the water range from 3.4 x 104 to 03.8x 106 Cfu/ml and 1.4 x 103to 2.1 x 105Cfu/ml respectively. Cow dung has total coliform count of 6.9 x 105 while fish gills has total coliform count of 1.6x103cfu/g. Bacteria species such as Escherichia coli, Salmonella typhi, Aeromanas hydrophila, and shigella species were found in the water body. Escherichia coli, Aeromonas hydrophila, and Salmonella species were found in the fish samples. Escherichia coli, Aeromonas hydrophila, Shigella species and Salmonella species were isolated from cow dung. Physicochemical Parameters such as DO, BOD and N03-N range from 4. 7 to 5.2mg/l, 0.2 to 0.9mg/1 and 7.0 to 9.3 mg/l respectively. This result shows that Kainji Lake is an intermediately polluted water. It is therefore necessary that cow dung used for fertilization of fish ponds should be screened for pathogens before use. It is also recommended that pollution of surface water bodies through human activities should be discourage by legislation on water pollution.
    Beschreibung: Includes:- 6 tables.;14 refs.
    Schlagwort(e): Biology ; Fisheries ; Pollution ; Nigeria ; Kainji L. ; freshwater environment ; Bacteriology ; Water quality ; Environmental effects ; Pollution
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 209 - 218
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  • 3
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    Acute toxicity and behavioural effects of chlorpyrifosethyl pesticide to juveniles of Clarias gariepinus Teugels (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23253 | 19325 | 2018-03-25 14:37:19 | 23253 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-13
    Beschreibung: Chlorpyrifos-ethyl with its mode of action was evaluated in laboratory studies to determine its 96-h acute toxicity, using juveniles of Clarias gariepinus. The fish was exposed in glass aquaria to 0.64~cmg/l, 0.80mg/l, 0.96mg/l, 1.12mg/1 and 1. 28mg/1. The test substance was found to have lethal effects on fish as they changed fish behaviour and caused death. The 96-hLC50 value for C. gariepinus was estimated as 0.92mgl-1. Observations of be bavioural and mophlogical responses were used as indicators of sublethal toxicity. The behavioural toxicology bioassay may be valuable in comparing and predicting the mode of action of new or unknown toxicants in this and other fish species.
    Beschreibung: Includes:- 1 table.;1 fig.;2 plates.;38 refs
    Schlagwort(e): Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; freshwater environment ; Toxicity ; Toxicants ; Pollution ; Lethal effects
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 264 - 272
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  • 4
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    Influence of abattoir effluents on abundance of freshwater prawns Macrobrachium vollenhovenii, M. macrobrahion and M. felicinum of Lower Ogun River, Western Nigeria (2021)
    FISON | Kaduna
    In:  http://aquaticcommons.org/id/eprint/23281 | 19325 | 2018-03-28 15:57:48 | 23281 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-13
    Beschreibung: The implications of the abattoir effluents discharge into the Lower Ogun River in Isheri-Olofin area on the abundance of three African fresh water prawns: Macrobrachium vollenhovenii, M macrobrachion and M. felicinum were assessed. Monthly prawn collections were undertaken using a scooping bag net with 0.05mm mesh size at three stations with 100m intervals in each of Ishasi (upstream) and Isheri-Olofin (downstream) areas of the river for 24months (January, 2006-December, 2007). For the 24month period, the upstream (pooled data from stations 1,2 and 3) had M. vollenhovenii of total and mean density of 27,938.33 prawn/m2 and 1164.60prawn/m2 1131.04 respectively, while total and mean M. vollenhovenii density of 5,815.43prawn/m2 and 243.81 prawn/m2 231.45 were obtained in the downstream (pooled stations 4, Sand 6 data). T-test showed the entire upstream to have significantly higher M. vollenhovenii density than the entire downstream (p〈0.05). The entire upstream had higher M. macrobrachium total and monthly mean density (19,092prawn/m and 816.44prawn/m2 1,354.28) than the entire downstream (6,384.47prwn/m2 and 266.02m2524.94) (p〈0.05). Also, significantly higher total and monthly mean density of M felicinum were obtained upstream (20,9S6.S0prawn/m2 and 873.46prawn/m21615.06) than downstream (10,9668.11prawn/m2 and 461.16prawn/m2975.19) (p〈0.05). The significance of the decline in abundance of each of the three Macrobrachium prawn species in the downstream area was discussed.
    Beschreibung: Includes:- 4 figs.;18 refs.
    Schlagwort(e): Biology ; Ecology ; Macrobrachium vollenhovenii ; Macrobrachium macrobrachion ; Macrobrachium felicinum ; Nigeria ; Ogun River ; freshwater environment ; Abundance ; Population density ; Shrimp fisheries ; Pollution ; Pollution effects ; Effluents
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-6
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  • 5
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    Evaluations off heavy metals in fish from Lake Geriyo Yola, Nigeria using x-ray fluorescence technique (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Beschreibung: Includes:- 1table.;11 refs.
    Schlagwort(e): Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 69-71
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  • 6
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    Toxicity of promethazine hydrochloride (Phenergan) to Clarias gariepinus fingerlings (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23360 | 19325 | 2018-04-08 17:55:59 | 23360 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The acute toxicity of promethazine hydrochloride (phenergan) to Clarias gariepinus fingerlings was conducted using static bioassay under laboratory conditions. The 96h LC50 was determined as 172.5 mg/1. Mean mortality was 5, 10, 20, 50, 100% in the concentration of 69, 103.5, 138.0, 172.5 and 207 mg/1 respectively, while there was no mortality in the control treatment. There were significant differences (P〈0.05) on the effect of concentration, the higher the mortality of C. gariepinus fingerlings while toxicity of phenergan increased with duration of exposure. C. gariepinus showed increased hyperactivities, cell deformation, lesions and necrosis during the period of exposure. The physicochemical parameters also showed a slight increase as the concentration increased.
    Beschreibung: Includes:- 2 tables.;9 refs.
    Schlagwort(e): Aquaculture ; Ecology ; Pollution ; Clarias gariepinus ; Nigeria ; stress ; freshwater environment ; Toxicology ; Histopathology ; Biological stress
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 152-154
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  • 7
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    Bioaccumulation and carbohydrate levels of Tilapia zillii exposed to sublethal concentrations of lead and copper (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23353 | 19325 | 2018-04-08 12:01:37 | 23353 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: Tilapia zilili is a commonly cultured fresh water fish and of major economic importance in tropical and subtropical countries throughout the world. Effect of the sub lethal concentrations of copper and lead to T. zillii for 12-week exposure period was carried out. The elements were assayed using Shimadzu AA 6200 atomic absorption spectrophotometery and the results were given as ~k/g dry wt.The bioaccumulation factors of lead and copper were significantly (P〈0.05) higher in treated fishes than the control. Effect of these metals on the quantitative carbohydrate levels in the plasma, muscle and liver were observed. The different concentrations of the various heavy metals caused significantly (p〈0.05) corresponding decrease in the fish muscles and liver glycogen levels.
    Beschreibung: Includes:- 1 table.;2 figs.;8 refs.
    Schlagwort(e): Aquaculture ; Health ; Pollution ; Tilapia zillii ; Nigeria ; freshwater environment ; Bioaccumulation ; Pollution effects ; Sublethal effects ; Toxicity tolerance ; Copper ; Heavy metals ; Lead
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 124-127
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  • 8
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    Effects of salinity on larval dimension of Tilapia guineensis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23422 | 19325 | 2018-04-25 19:24:46 | 23422 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: Tilapia guineensis eggs were spawned and hatched in different salinities (17, 12, 7, 5, 2 and 0) ppt. The study was conducted in eight replicates. The aim of the investigation was to ascertain disparity in hatching size of Tilapia guineensis attributable to salinity. Immediately hatching was observed, body weight of five hatchlings in each replicate was individually weighed in milligramme. The individual total length of the five hatchlings was also measured in millimeter. The height of the yolk sac larva was determined with micro-metre screw gauge graduated in millimeter from the top of the yolk sac to the dorsal region of the larva. Data obtained were used to calculate yolk sac volume. Significant differences (P〈0.01) were observed in body weight and total length of larvae hatched in different salinities. The heaviest and longest larvae were hatched in 12 ppt saline water. The yolk sac volume of larvae hatched in lower salinities were significantly higher (P〈0.01) than the yolk sac volume of larvae hatched in higher salinities. The smallest yolk sac volume was recorded in 12ppt saline water. Our findings show that salinity could be manipulated for economic production of heavier seeds of Tilapia.
    Beschreibung: Includes:- 5 tables.;6 refs.
    Schlagwort(e): Aquaculture ; Chemistry ; Tilapia guineensis ; Nigeria ; brackishwater environment ; Salinity effects ; Larvae
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 51-55
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  • 9
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    Aquatic macrophytes roles in nutrient and heavy metal regulation (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23376 | 19325 | 2018-04-10 16:15:11 | 23376 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The activities of man have directly or indirectly influenced the aquatic ecosystem by increasingly polluting wetlands. Water quality influences the growth of fish. The utilization of aquatic weeds for the recovery of nutrients and heavy metals in polluted wetlands is a proffered management strategy. This paper reviews the role of aquatic macrophytes in nutrients and heavy metal sequestering.
    Beschreibung: Includes:- 1 table.;refs. 30.
    Schlagwort(e): Pollution ; Nigeria ; freshwater environment ; Pollution ; Pollution effects ; Heavy metals ; Aquatic plants ; Water pollution
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 36-38
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  • 10
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    Eutrophication as a challenge to sustainable capture fisheries: a case study of Oyun reservoir (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23378 | 19325 | 2018-04-10 16:38:47 | 23378 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: High concentrations of nitrate and phosphate from run-off of nitro phosphate fertilizers from nearby farmlands were recorded from Oyun reservoir, causing cultural eutrophication which affected the catch and fish assemblages; with high abundance of fish in the dry season and dominance of Cichlids while Heterotis niloticus and Barbus occidentalis were endangered. Management techniques to prevent extinction of its fisheries and sustainable exploitation of the fisheries such as watershed and construction best management practices (BMPs) to control eutrophication and fisheries conservation were suggested.
    Beschreibung: Includes:- 2 tables.;11 refs.
    Schlagwort(e): Ecology ; Fisheries ; Pollution ; Nigeria ; Oyun R. ; freshwater environment ; Eutrophication ; Water quality ; Physicochemical properties ; Nitrates
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 44-47
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