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  • 1
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    Biogeochemical study of poly aromatic hydrocarbons (PAHs) and its physiological affection response in mudskipper (Boleophthalmus dussumieri) at coast of Khuzestan (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Biology
    In:  http://aquaticcommons.org/id/eprint/19121 | 17408 | 2016-02-01 21:05:26 | 19121 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Study on the biomarkers types to assess health status of marine ecosystems in environmental biomonitoring has an important value. Accordingly, accumulation of polycyclic aromatic hydrocarbons(PAHs) in sediment, water and tissues (liver and gill) of mudskipper(i.e. Boleophthalmus dussumieri) and some physiological responses like lysosomal membrane change performed on haemocytes, stability of red blood cell membrane and the Glutathione-S Transferase (GST) activity in the liver were measured in mudskipper. Samples were obtained from five sites along north western coast of the Persian Gulf (Khuzestan coast). Red blood cell membrane changes after different concentration of PAHs at different time was also studied to evaluate impact of PAHs compound on cell membrane. PAHs concentration was measured by HPLC method. The activity of GST enzyme was analysed by spectrophotometric method. Lysosomal membrane change was measured by NRR time method and stability of red blood cell membrane was evaluated by EOF test. Total PAH concentrations in the coastal sea water, the sediments, theliver and the gill tissues ranged between 0.80-18.34 μg/l, 113.50-3384.34 ng g-1 (dry weight), 3.99-46.64 ng g-1 dw and 3.11-17.76 ng g-1 dw, respectively.Highest PAHs pollution was found at Jafari while the lowest was detected at Bahrakan sampling sites. The lowest enzymatic activity was identified at Bahrakan (7.19 ± 1.541 nmol/mg protein/min), while the highest was recordedat Jafari (46.96 ± 7.877 nmol/mg protein/min). Comparative analysis of GST activity in the liver of mudskippers showed significant difference (p 〈 0.05) between the locations of Jafari and Bahrakan, and with other sites. Moreover, nosignificant difference was detected between the locations of Arvand, Zangi and Samayeli (p 〈 0.05). The mean RT was below 90 minutes in all sampling sites.Values of mean RT of the dye ranged from 34 (for the blood samples of mudskipper collected from Jafari site) to 78 minutes (for the blood samples of mudskipper collected from Bahrakan site). Spatial evaluation revealed the longest RT in fish from Bahrakan as compared with those from other sites.Preliminary results showed a significant difference (p 〈 0.05) among sampling sites except between Arvand and Zangi (p 〉 0.05). Osmotic fragility curves indicated that erythrocytes collected from mudskippers at Jafari were the most 009fragile followed by Zangi〉 Arvand〉 Samayeli〉 and Bahrakan. The mean erythrocyte fragility was significantly higher at Jafari site (p 〈 0.05) when compared to other sites. Significant differences were found between the varioussites (p 〈 0.05).The result indicated no significant differences between the control and treatments of mudskipper RBC exposed to field concentrations of PAHs (P〉0.05). The results further indicated significant differences (P〈0.05) between the control and treatments of mudskipper RBC exposed to acute. Potency Divisor concentrations. It is clear from the present result that chronic. Potency Divisor concentrations protect red cells against osmotic hemolysis. This study, however, showed that PAH concentrations in this region are not higher than the available standards. The findings showed that Lysosomal membrane destabilization, liver GST activities and fragility of red cell membrane are highly sensitive in the mudskipper, B. dussumieri. Thus, mudskipper perceived to begood sentinel organisms for PAH pollution monitoring. Sediment PAH concentrations were strongly correlated with biomarkers, indicating that PAH type pollutants were biologically available to fish. One of the possible riskassessment implications of this study is that biomarkers can be applied not only to characterize biological effects of pollution exposures, but also to determine the bioavailability of pollution in aquatic systems. The results also indicated that PAHs compound possess anti haemolytic property.
    Description: PhD
    Description: Advisors:P. Eghtesadi Araghi, A. Mashinchian Counsellors: M. R. Fatemi, G. Riazi
    Keywords: Biology ; Chemistry ; Fisheries
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
    Format: application/pdf
    Format: 134
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  • 2
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    Refolding of omega conotoxin peptide derived from marine snail, Conus magus, to evaluate its analgesic effects (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Biology
    In:  http://aquaticcommons.org/id/eprint/20998 | 17408 | 2016-08-17 09:39:37 | 20998 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Oxidative refolding is one of the key challenges hampering the development of peptide based compounds as therapeutics. The correct refolding for three disulfide peptide like w-Conotoxi n MVIIA is difficult and crucial for biological activity. This work advanced knowledge of chemical and biological for improve oxidative refolding of synthetic w-Conotoxi n MVIIA in base of Conus magus venom. The present study aimed to set up an appropriate and effective protocols for refolding of disulfide-rich w-Conotoxin MVIIA. In this study, the crude peptide was protected with Acm group, according to the right amino acid sequences (Synthesized by Australian Company). The crude peptide was purified by H PLC. To prepare the peptide to refolding, innovative deprotection applied molar ratio (AMR) method was performed based on mercury. Accuracy of deprotection was approved by reverse phase chromatography. The deprotected target peptide (omega-conotoxin) was determined by SDS-PAGE. Then the Oxidative refolding of target peptide was performed in six protocol based on Guanidinium chloride and oxidized and reduced Glutathione. Analgesic effect of refolded peptide was surveyed with formalin test in mice Balb/c. Non neurotoxic effects of target peptides were survey with ICV injection in mice model (C57/BL6). The innovative deprotection protocol performed based on the best ratio of mercury/2-mercaptoethanol adjusted to 1mg/10p1 in 90 minute. The results showed the yield and purity of omega-conotoxin MVIIA as 93 and 95%, respectively. Refolding of 40 mg omega Conotoxin with GSSG and GSH on ratio of 10:1 and 20 mM ammonium acetate showed the best analgesic effect compared with the other methods. The result showed 95.5% yield and 98% purity of omega-conotoxin MVIIA in this refolding method. Related refolding method reduced 85% pain in experimented mice using 7 ng of the peptide. That was 71.5 fold stronger than morphine and 2 times than standard Prialt®. And it was not neurotoxic in mice. In this study, refolding method for omega-conotoxin MVIIA was optimized in the fourth factor including: reducing the time, amount and number of reagent and increase the efficiency. We introduced new method for deprotection of omega-conotoxin MVIIA. Effective, economic and applied refolding and deprotecti on method was performed in this research may al so be applied to similar omega conotoxin peptides.
    Description: PhD
    Description: Advisors: Delavar, Shahbazzadeh; Shahla, Jamili; counsellors: Kamran, Pooshang Bagheri; Pargol, Ghavam Mostafavi
    Keywords: Biology ; Chemistry ; Fisheries
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
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    Format: 120
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  • 3
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    Biological activities (antibacterial, antifungal and cytotoxic) of secondary metabolites of Ircinia spp. (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Biology
    In:  http://aquaticcommons.org/id/eprint/21024 | 17408 | 2016-08-24 10:11:29 | 21024 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Sponges are the most primitive of the multicellular, These organisms don’t have any mechanical defense system, so their early appearance in evolution has given them a lot of time for the development of advanced secondary metabolites as chemical defense system. Sponges have the potential to provide drugs from chemical components against diseases. In this investigation the sponge samples, which it is Ircina spp., were collected at depth of 15- 24 meter, from locations on the coastline of Island Kish in Persian Gulf of Iran. For identifying natural components, methanolic and diethyletter were used as extraction solvents, after removal of the solvents, the GC/MS spectra of the fraction were obtained. Then in vitro cytotoxic, antimicrobial and antifungal were identified. In vitro cytotoxity screening, by XTT assay, against KB/ C359 and HUT-56/ C365 cell line, was conducted in this study in 1 - 544 μg/ml. IC54 for winter diethyletter extract was 325 μg/ml, winter methanolic extract was 364 μg/ml, IC54 for summer diethyletter extract was 544 μg/ml, and summer methanolic extract was 454 μg/ml in HUT-56. IC54 for winter diethyletter extract was 454 μg/ml, winter methanolic extract was 444 μg/ml, IC54 for summer diethyletter extract was 344 μg/ml, and summer methanolic extract was 424 μg/ml in KB. In vitro antimicrobial activity by Broth Dilution Methods against clinical gram-positives and gram negatives (Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilis). The results conducted that the MIC values of winter diethyletter extract for Escherichia coli 24mg/ml, the MIC values of winter diethyletter extract for Escherichia coli 24mg/ml, the MIC and MBC values of winter diethyletter extract for Staphylococcus aureus was 2mg/ml and 24mg/ml. The MIC and MBC values of winter diethyletter extract for Bacillus subtilis was 1.5 mg/ml and 2mg/ml. In vitro antifungal activity by Broth Dilution Methods against clinical pathogens; Candida albicans and Aspergillus fumigatus. The results conducted that the aqueous extracts didn’t have any antifungal activities on pathogens, the MFC of the summer and winter diethyletter extract was 30 mg/ml and 2 mg/ml A. fumigates, the summer and winter methanolic extract was 0722 mg/ml and 2 mg/ml A. fumigates, the summer and winter methanolic was 4/75mg/ml, MFC 5 mg/ml on C. albicans.
    Description: PhD
    Description: Advisors: A. A., Motallebi; SH., Jamili; Counsellors: A., Mashinchian; P., Gavam Mostafavi
    Keywords: Biology ; Chemistry ; Fisheries ; Health
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
    Format: application/pdf
    Format: 162
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  • 4
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    Determination of some hematologic effect the Persian Gulf blackfin stonefish, (Pseudosynanceia melanostigma), venom on albino mice blood (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Biology
    In:  http://aquaticcommons.org/id/eprint/21650 | 17408 | 2017-11-14 09:22:12 | 21650 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-06-27
    Description: Toxins produced by flora and fauna and its proteins as well as valuable pharmaceutical compounds. They contain proteins used in producing painkillers, drugs for treating cancer, infectious diseases, allergy, blood pressure, etc. In this study on 250 blackfin stonefish, we investigated the LD50 and hematological effects of the toxin produced by this fish along with its pharmacological and enzymatic properties investigated by other researchers. One and three LD50 of venom injected IM in Rabbits under study was administered IV and different parameter like PT, PTT, cbc total protein and SDS-PAGE venom electrophoreses were studied before and 24 hours after venom injection. The total protein was estimated 331 µg/ml and the level of RBC WBC were 6.62 and 7.1 mm3 before venom treatment and reduce to 6.3 and 5.7 mm3 after venom injection. The MCH=21 pg MCHC=32.6% Hb=13.95 g/dl HCT=42.8% were before venom treatment and reduce to MCV=65.3 fl MCH= 22 pg MCHC=33.7% Hb=12.7 g/dl HCT=37.7% after venom injection The PT and PTT reduce after venom treatment (before venom treatment were PT=8.5 second & PTT = 27 second and after venom injection PT=15 second & PTT = 34 second) the platelet count reduce after venom injection (before venom=495 103/microliter and after venom was 49 103/microliter). Our results showed that the venom caused a significant reduction In WBC, RBC Hb, Hct, and platelet count which is due to lysis of cell after venom treatment.
    Description: Masters
    Description: Advisors:Dr. Shahla Jamili; Dr. Hossein Zolfagharian
    Keywords: Biology ; Chemistry ; Fisheries
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
    Format: application/pdf
    Format: 101
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  • 5
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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
    Publication Date: 2021-07-13
    Description: 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
    Description: Includes:- 2 tables.;2 figs.;7 refs.
    Keywords: Chemistry ; Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Amino acids ; Ash content ; Lipids ; Organic compounds ; Moisture ; Proteins
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 91 - 95
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  • 6
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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
    Publication Date: 2021-07-14
    Description: 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.
    Description: Includes:- 1table.;11 refs.
    Keywords: 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
    Type: conference_item , TRUE
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    Format: application/pdf
    Format: 69-71
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  • 7
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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
    Publication Date: 2021-07-14
    Description: 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.
    Description: Includes:- 5 tables.;6 refs.
    Keywords: Aquaculture ; Chemistry ; Tilapia guineensis ; Nigeria ; brackishwater environment ; Salinity effects ; Larvae
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 51-55
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  • 8
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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
    Type: conference_item , TRUE
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    Format: 349-352
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  • 9
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    Status of fish farming in Rivers State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24593 | 19325 | 2018-05-20 16:09:32 | 24593 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study surveyed the status of fish farming in Rivers State of Nigeria. Structured interview schedule questionnaires were used in sourcing information from 90 fish farmers randomly selected from nine local government area, with three local government each drawn from each agricultural zone of the state. Data obtained were analyzed using descriptive statistics. The findings revealed that majority (34.4%) of the fish farmers were male and between the age range of 41-50 years. 31.1% of fish farmers cultured their fish in concrete fish tanks. The total mean annual production of fishes were 41,000 metric tons, 38.9% of fish farmers practiced integrated fish farming, 72.2% of the farmers practice only fish production; 58.9% of farmers sourced their information from friends/fellow farmers. In terms of water supply, 40.0% of farmers sourced their water supply from borehole, 36.6% use tilapia species as their fingerlings, 38.9% of farmers sourced their fingerlings from government hatchery 15.2% of farmers indicated that they suffer loss of tilapia, 54.4% farmers use partial harvest, 92.6% of farmers indicated irregular electricity supply as a major constraints to fish production. In order to facilitate the efficient operation of fish farming in the study area, technical advice on pond construction and preparation, species selection and supply for stocking purposes and collection of relevant data on aquaculture will help in the improvement of fish farming in the study area.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Nigeria ; Rivers state ; Aquaculture ; Fish ; Rivers State ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 109-113
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  • 10
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    Physico-chemical parameters of fish ponds as it affects fish production in Ado-Ekiti, Ekiti State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24590 | 19325 | 2018-05-20 16:05:58 | 24590 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The water analysis of five selected ponds in Ado-Ekiti in Ekiti State, was carried out to determine their suitability for fish culture. Pa rameters analyzed were: Temperature, Turbidity, Carbon (IV) oxide, Alkalinity, Hardness, pH and Dissolved oxygen. Values for temperature ranged between 20.0~'C and 29.0~'C, Turbidity values were between 46.0-50.2cm, Carbon (IV) oxide: 11.5-12.2mg/litre; alkalinity: 100-120mg/liter; hardness: 110-200mg/litre; pH: 6.8-7.8 and dissolved oxygen: 5.8-6.8mg/liter. The values obtained were found to be within acceptable range for fish production.
    Description: Includes: 10 references.
    Keywords: Aquaculture ; Chemistry ; Nigeria ; Physico-chemical parameter ; Fish pond ; Ado-Ekiti ; Fish production ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 97-100
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  • 11
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    Modification of NIFFR multipurpose smoking kiln with insulation (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24669 | 19325 | 2018-05-23 07:44:23 | 24669 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on the old NIFFR smoking kiln in order to improve on it. The parameters used to determine the smoking efficiency include the loss in weight of the fish samples, temperature and the time taken to properly smoke the fish using fire wood as smoking fuel. The smoking kiln was tested by smoking three different species of fish: Clarias gariepinus, Oreochromies niloticus, Synodontis membranecious over a period of two hours. The modified smoking kiln was discovered to perform faster. Its advantage over the already existing one is that it is faster in smoking fish to a regular golden brown colour. The temperature of the heat supplied was quite higher about 100~'C to 120~'C than the commonly used drum oven. The smoking kiln has the average oroduction cost of No.90,000.
    Description: Includes: 9 references.
    Keywords: Fisheries ; Nigeria ; Fish ; Wire mesh tray ; Mild steel ; Chimnet ; Damper plate ; freshwater environment ; automation
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 415-418
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  • 12
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    Effect of Terminalia suparba on fecundity and latency period of Clarias gariepinus broodstocks (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24067 | 19325 | 2018-05-10 10:15:21 | 24067 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study focused on the assessment of Terminalia suparba (bark, leave and root) based diet to improve the ovulation of Clarias gariepinus brood stocks. Ten female and ten male brood stocks were obtained from a reputable fishfarm in Ogun State, Nigeria and were fed with the diets for four weeks before the breeding exercise. The latency period observed in treatments 1 to 4 was 4hours 30minutes while the ovulation period in treatment 5 was 8 hours. There was no significant different (P〉0.05) among the means. The brood stocks in Treatment 2 (Root) has the highest fecundity count (2001) while those in Treatment 5 (control) has the least fecundity count (1496). The phytochemical analysis of the plant materials showed the presence of Alkaloids, Tannin, Phenol, Glycoside, Flavonoids, Steroids, Phlobatannin, Saponin, Anthraquinones. The physical and chemical parameters of water observed showed that dissolved oxygen value ranges from 3.28 -4.60, pH 6.5 - 8.5, temperature 28.0 - 28.8 and conductivity 8.9 - 9.20. It is therefore concluded that the inclusion of Terminalia suparba in the feed of Clarias gariepinus broodstock will not only improve ovulation but also reduce the latency period.
    Description: Includes: 5 tables;Also includes: 11 refs.
    Keywords: Aquaculture ; Chemistry ; Ecology ; Clarias gariepinus ; Nigeria ; broodstocks ; Terminalia specie ; Latency ; fecundity ; Clarias gariepinus ; freshwater environment ; Artificial feeding ; Feeding experiments ; Fecundity ; Brood stocks ; Sublimation heat ; Ovulation ; Physicochemical properties ; Fish culture
    Repository Name: AquaDocs
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  • 13
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    Microbial load on the African catfish (Clarias gariepinus) sold in Markurdi metropolis: a case study of selected markets (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24069 | 19325 | 2018-05-10 10:21:32 | 24069 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The work was carried out using 48 samples of smoke-dried African catfish (Clarias gariepinus). Twelve samples each were obtained from high level market, Wadata market, Wurukum Market and North bank market respectively. Different media (SDA, MSA, EMBA, N.A, MCA), gram reaction and biochemical tests were carried out to confirm the presence of the pathogenic bacteria. There was a strong correlation between the bacterial count and water activity of the fish for all bacterial isolates. The micro-organisms isolated were Aspergilus niger, Mucor spp, Salmonella spp, Escherichia coli and Staphylococcus aureus which were indications of contamination from surrounding environment.
    Description: Includes: 5 tables and 4 figs.;Also includes: 16 refs.
    Keywords: Fisheries ; Health ; Clarias gariepinus ; Nigeria ; African catfish ; Bacterial load ; Makurdi ; Mycoflora ; Smoke-dried fish ; freshwater environment ; Microorganisms ; Cured products ; Fish ; Pathogens ; Biochemical analysis ; Processing fishery products ; Storage life
    Repository Name: AquaDocs
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  • 14
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    Fish: the healthy friendly species (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24070 | 19325 | 2018-05-12 13:51:23 | 24070 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish is a very important part of a healthy diet. Fish and other seafood are the major sources of healthful long-chain omega-3 fats and they are also rich in other nutrients such as vitamin D and selenium, protein, and low in saturated fat. There is strong evidence that eating fish or taking fish oil is good for the heart and blood vessels. Research over the past few decades has confirmed the importance of the nutritional components of fish in brain development and reproduction and highlighted a role for fish in a variety of other functions in the body. Much of the importance of fish in health has come from research into long chain polyunsaturated fatty acids (PUFA) of the n-3 family. The n-3 Fats are also generally known as omega 3 fats. Fish is a rich source of two important n-3 PUFAs, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DBA). Marine algae are the only form of life that can easily make long chain n-3 PUFA. As fish feed on algae, they become rich sources of these important n-3 fats which in turn transfer to humans through consumption of the former. In addition, fish is also a good source of iodine, zinc vitamins A and some B vitamins. Fish intake has bee on decline for many years based on different food consumption survey with alarming findings that some people never eating fish without any taboo attached. The level of fish intake has been linked with a lower risk of death from heart disease and likewise playing vital roles in preventing other illnesses such as arthritis, strokes, breast cancer, diabetes to mention a few. However, it is recommended by various finding that eating fish at least twice a week and including oil- rich fish at least once a week in diet will maintain healthy conditions against illnesses.
    Description: Includes: 3 tables;Also includes: 50 refs.
    Keywords: Fisheries ; Nigria ; Fish ; Healthy ; Friendly ; Species ; freshwater environment ; Fish ; Fish oils ; Heart ; Nutrition ; Nutritive value ; Vitamins ; Fatty acids ; Heavy metals ; Pollutants
    Repository Name: AquaDocs
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  • 15
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    Aflatoxin levels in fish feeds in Abeokuta, Ogun State (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24071 | 19325 | 2018-05-12 13:53:17 | 24071 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Post harvest contamination can occur if drying of feed is delayed and when water is allowed to exceed critical values for mould to grow during storage. This study examined the aflatoxin levels in fish feeds surveyed in Abeokuta, Ogun State, Nigeria. Fifteen (15) fish farms were randomly selected for assessment of the aflatoxin levels in fish feeds in Abeokuta. After the estimation of the aflatoxin levels using Veratox quantitative aflatoxin test, the Aflatoxin concentrations in the samples ranged between 0-49 ppb with a mean value of 6.89 ppb. Results obtained from this study showed that aflatoxins were found to be associated with fish feeds in different fish farms in Abeokuta, but, a very high proportion of the feed samples were below the regulatory levels (maximum of 20 ppb) that may not be toxic to the health of the fish according to the regulatory levels for aflatoxins issued by the Food and Administration of the United States. Thus, feeds fed to the cultured fish species in farms in Abeokuta were fit for consumption, with very little or no threat of aflatoxicosis (a disease that can affect many species of fish, when feed contaminated with aflatoxin is consumed).
    Description: Includes: 1 table and 1 figure;Also includes: 13 refs.
    Keywords: Aquaculture ; Conservation ; Nigeria ; Fsh feeds ; Aflotoxin ; Aflotoxicosis ; Aspergillus species ; Aflotoxin in fish feeds ; freshwater environment ; Feed ; Pollution ; Storage ; Storage effects ; Biological poisons ; Fish
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    Comparative assessment of fermented maize broth and cassava waste water on the growth performance of catfish (Clarias gariepinus) fry (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24078 | 19325 | 2018-05-12 14:08:28 | 24078 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to evaluate and compare the growth performance of catfish fry on fermented maize broth and cassava waste water. Four day old fry (weight range 0.002 - 0.003g) of C. gariepinus were acclimatized in 10 litres glass tank of water for 5 days in Aquaculture Department of Nigerian Institute for Oceanography and Marine Research, Victoria Island, Lagos. Shell free artemia was mixed with Fermented Maize Both (FMB), Fermented Cassava Waste water (FWC) and bore hole water (control) respectively. The artemia mixtures were allowed to air-dry before administration. The treatments were produced in triplicates, feeding, ad-libitium for 30 days. The fry were fed with the treated shell free artemia and weighed every 6 days. The results revealed that fry fed fermented cassava waste water [FCW] diet showed highest mean weight, daily growth rate [DGR], survival rate and specific growth rate [SGR] and lowest food conversion ratio (FCR). This was followed by fermented maize broth while fish fed artemia mixed with borehole water-had the least growth. The results suggest that addition of fermented cassava waste water to shell free artemia can enhance fish growth in catfish hatchery production.
    Description: Includes: 1 table and 1 figure;Also includes: 13 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Lagos ; Growth performance ; Fermented cassava waste water (FCW) ; Maize broth (FMB) ; freshwater environment ; Feeding experiments ; Fish culture ; Growth rate ; Fish ; Fry ; Feed ; Nutrients (mineral) ; Waste water ; Comparative studies ; Fermentation ; Length-weight relationships
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  • 17
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    Growth performance and feed utilization of Clarias gariepinus (Teugels) fed different dietary levels of soaked Bauhinia monandra (Kutz) seed meal (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24076 | 19325 | 2018-05-12 14:04:20 | 24076 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to evaluate the suitability of soaked Bauhinia monandra (Kutz) seed as alternative protein source for Clarias gariepinus and to determine cost of feed compounded. The proximate analysis of the diet and carcass composition of fish (crude protein, crude fibre, ash, moisture content and lipid were determined using AOAC (1980). Data for each parameter were subjected to analysis of variance (ANOVA) while means of various results were compared at 5% level of significance. A preliminary study was conducted to determine the best processing method that reduced anti-nutrients to the minimum level without impairing nutrients composition. Boiled, toasted and soaked seeds were used. Bauhinia seeds soaked for 96 hours had least concentration of anti-nutrients. The experimental diets was formulated to contain soaked Bauhinia seed meal (SBSM) at levels of 25%, 50% and 75% inclusion (Diets 2, 3 and 4 respectively) with two diets acting as control (Diets 1 and 5). All diets were isonitrogenous (40% crude protein) and isocaloric (3212kcal/kg). A 12 weeks feeding trial was conducted in juveniles which were randomly distributed into 24 improvised non-recirculatory and semi-flow through indoor plastic tanks (52cm X 34cm X 33. 5cm) at a stocking rate of 10 fish per tank and three (3) replicates per treatment. The experimental design was complete randomized. The fish were fed at 5% body weight, twice daily. Diets with higher inclusion levels of SBSM (diets 3 and 4) significantly depressed growth formance of fish. The variations observed in the SGR, FCR, FER and PER were associated with the anti-nutrients present in the diets, these parameters reduced with increasing levels of SBSM in the diets of fish. Based on the relative cost of diets per unit eight gain and protein gain, diet 2 (25% SBSM) was most economical. The results suggested that SBSM can be used to substitute up to 25% levels of dietary protein in C. gariepinus juveniles without significant reduction in growth.
    Description: Includes: 4 tables;Also includes: 23 refs.
    Keywords: Ecology ; Aquaculture ; Nigeria ; Katsina State ; Growth ; Feed utilization ; i Clarias gariepinus/i ; freshwater environment ; Fish ; Feeding ; Utilization ; Diets ; Feeding experiments ; Carcasses ; Growth rate
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  • 18
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    Lenght-weight relationship and condition factor of blackchin tilapia (Sarotherodon melanotheron) cultured in sheltered outdoor tanks (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24082 | 19325 | 2018-05-12 14:16:24 | 24082 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Length-weight relationship (LWR) and condition factor (K) of ninety specimens of Blackchin tilapia, Sarotherodon melanotheron cultured for six months in sheltered outdoor tanks were conducted. Initial measurements averaged 0.04 g for weight, while the total length averaged 1.17 cm. Fortnightly, measurements of length and weight gain were recorded over a period of six months. At the end of the experiment, the total length averaged 12.58 cm while the average body weight was 28.55 g. The growth equation for the population studied is Log W = 2.808Log L - Log 1.6117 where the growth factor b estimated showed a negative algometric growth. The average condition factor k was found to be 1.754 ~c 0.329 and there was a very strong positive correlation (r = 0.99) between the length and weight of individuals examined. The correlation coefficient (R2) was estimated to be 0.9974. The implication of the LWR parameters to rearing this species in a confined enclosure was highlighted.
    Description: Includes: 2 tables and 1 figure;Also includes: 11 refs.
    Keywords: Aquaculture ; Ecology ; Sarotherodon melanotheron ; Nigeria ; Lagos ; Sarotherodon melanotheron ; Lenght-weight relatioship ; Condition factor ; freshwater environment ; Length-weight relationships ; Condition factor ; Fish ; Fish culture ; Population dynamics ; Fibre glass ; Culture tanks ; Fry
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  • 19
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    Response of Oreochromis niloticus to graded levels of crude proteins (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24086 | 19325 | 2018-05-12 14:22:57 | 24086 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Completely randomized design with triplicates was used to carry out twelve weeks nutrimental experiment to determine the exact crude protein (CP) requirement specifically for, optimal growth performance of Oreochromis niloticus fry that has adapted to the New Bussa environmental condition with the objective of producing all-male tilapia from the brood stock stage. Graded levels (25, 30, 35 or 40 %) of crude protein diets were fed to 20 fry per replicate in aquaria. There were significant differences in the feed consumed, specific growth rate and final weight (P〈0.05) although there was no significant difference in feed conversion ratio (p〉 0.05) of the different groups that fed on the four diets. There were also significant differences (P〈 0. 05) in the whole body proximate composition of fish groups with the significant maximum crude protein occurring in the group fed with 40 %CP and maximum lipid in 25% CP group (P〈 0. 05) indicating excessive accumulation of lipid when low protein diets are fed to O. niloticus. It was recommended that 40 % CP might be most ideal for O. niloticus fry that had adapted to Kainji environmental condition.
    Description: Includes; 3 tables;Also includes: 17 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Oreochromis niloticus ; fry ; Crude protein ; all-male tilapia ; freshwater environment ; Growth rate ; Fish ; Animal nutrition ; Fry ; Environmental conditions ; Primary production ; Nutritional requirements ; Proteins ; Aquaculture
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  • 20
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    Evaluation of fish biodiversity integrity of Ebonyi River (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24083 | 19325 | 2018-05-12 14:17:44 | 24083 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study of the fish biodiversity integrity of Ebonyi River was conducted from September 2006 to February 2008 to generate fundamental data needed in Fisheries policy formulations and to assess the potential of the Fishery in enhancing quality food protein production. A total number of 1,080 fishes (comprising Fin-fish and shell-fish) were caught with hooks and lines of size 13, cast nets, gill nets and traps of mesh sizes of 50mm, 75mm and 100mm and identified using taxonomic keys. There were 39 species belonging to 20 genera and 14 families. Percentage gear catch composition was 43.6%,23.8%,17.7% and 15.3%for cast nets, gillnets, hooks and traps respectively. Zooplankton samples were also collected identified and analyzed using standard plankton analysis protocol. Cladocerans, rotifers, copepods and protozoans were represented in the identified species. Analysis of Variance (ANOVA) was used to determine the overall significance of the monthly means of all parameters and in locations and also to establish their correlation characteristics. Fisher's Least Significant Difference (F-LSD) was used to separate the means and to rank them. Family Amphilidae and Malapteruridae were not significant (p~B0.05) in monthly occurrence. Family Bagridae, Cichlidae and Clariidae showed highly significant (p〈0. 01) monthly differences while the remaining fish families exhibited significant (p〈0.05) differences in months. It was observed that artisanal fisherfolks used fishing gears whose mesh sizes deplete juvenile fish. It was concluded that there is an urgent need for improved management strategies to enhance sustainable productivity of the inland river system.
    Description: Includes: 3 tables;Also includes: 12 refs.
    Keywords: Fisheries ; Ecology ; Nigeria ; Ebonyi R. ; freshwater environment ; Fish ; Biodiversity ; Fishery policy ; Aquatic environment ; Inland fisheries ; Zooplankton ; Fishing gear ; Evaluation ; Fishermen ; Juveniles ; Depletion ; Ecology ; Stock assessment
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  • 21
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    Vitamin A requirements of Heterobranchus longifilis fingerlings (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24090 | 19325 | 2018-05-12 14:35:57 | 24090 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The growth response of Heterobranchus longifilis fingerlings (0.86~c0.07g) to supplementation of graded levels of vitamin A (0, 500, 1000, 1500 or 2000 mg/kg; Bio-Organics Nutrient System Limited, Lagos) into a 42.5% crude protein basal diet was investigated. Completely randomized design with triplicates was used in a mini flow through system after 2 weeks acclimatization for 20 weeks in New Bussa, Niger State, Nigeria. There was significant difference (P〉0.05) in feed intake, weight gain and survival between fish fed control diet (Omg vitamin A kg-1 diet) and the supplemented groups. The significantly (P〈0. 05) poorest feed conversion ratio, protein conversion ratio and specific growth rate were recorded in the group fed 2000 mg vitamin A kg-1 diet. However, whole body vitamin A concentration was significantly (P〈0.05) higher in the supplemented groups than the control but no significant different (P〉0.05) between supplemented groups. It was concluded that a diet containing adequate amount of macro and micro-nutrients with good lipid source will be able to provide vitamin A that can favour good growth in H. longifilis fingerlings. There is need to determine the response of the fish to vitamin A supplementation in an outdoor environment as vitamin A is required for the regeneration of light-sensitive compound rhodopsin.
    Description: Includes: 3 tables and 1 figure;Also includes: 13 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Heterobranchus longifilis ; Vitamin A ; Growth response ; freshwater environment ; Vitamins ; Growth ; Nutrients (mineral) ; Feed composition ; Fish ; Fingerlings ; Feeding experiments ; Aquaculture
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  • 22
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    Proximate composition and sensory analysis of African catfish (Clarias gariepinus) harvested from different sources in Ondo State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24088 | 19325 | 2018-05-12 14:29:17 | 24088 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Proximate composition and sensory evaluation of Africa catfish Clarias gariepinus harvested from earthen ponds, reservoir system, tank flow - through system and Flow Rivers were determined. Chemical assessment was based on the method of analysis of the Association of Official Analysis (AOAC). The samples collected shows moisture content 71.71~c1.65%, 74.20~c1.39, 73.60~c2.3% and 72.29~c68% from earthen ponds, reservoirs, and tank flow- through system and rivers respectively. The crude protein 9.77~c2.66%, 20.99~c0.68, 19.80~c0.53% and 18.84~c1.00% from earthen ponds, reservoir system, tank flow- through system and rivers respectively. There was no significant difference (p〉0.05) among the means recorded and the locations where the fish samples were collected has no effect on the value of the moisture and the crude protein content of the fish samples when compared. Crude fat contents 5. 68~c0. 81 %, 4.95~c0.38%, 3.85~c0.56% and 1.35~c0. 29%from reservoir system, low through system, earthen ponds, and rivers respectively. Ash content of the fish samples were 1.52~c0.40%, 1.49~c0.40%, 2.23~c0.91 % and 1.47~c0. 60% from earthen ponds, reservoir system, tank flow- through system and rivers respectively. There was a significant difference (p 〈0.05) among the means of the crude fat contents and ash contents. The location where the fish samples were collected influenced the means of the ash content and the crude fat contents. The taste, odour, appearance and texture were the indices for the evaluation. Fish from rivers were most preferred followed by earthen ponds, reservoirs system and tank flow- through system respectively.
    Description: Includes: 4 tables and 1 figure;Also includes: 15 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Ondo State ; Reservoir ; Tank flow-through ; River ; Earthen pond ; freshwater environment ; Aquaculture ; Chemical composition ; Fish ; Sense organs ; Evaluation ; Water content ; Lipids
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  • 23
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    The length-weight relationships of two Siluriformes in Owalla and Eko-Ende Reservoir of Osun State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24087 | 19325 | 2018-05-12 14:24:52 | 24087 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The length - weight relationships of two siluri formes Chrysichthys nigrodigitatus and Schilbe intermedius -from Owalla and Eko - Ende reservoirs were studied to provide useful information for the sustainable development of their fisheries. Length - weight data were analyzed, and LWR graphs were plotted using the sigma plot software. The b values in the LWR W = aLb varied between 3.01 and 3.58, revealing that the somatic growth of C. nigrodigitatus from Eko - Ende and that of Schilbe intermedius from both reservoirs had positive allometry, while C. nigrodigitatus from Owalla reservoir had an isometric growth. The maintenance of the ecological balance in the reservoirs will guarantee sustainable fisheries for these siluriformes.
    Description: Includes: 1 table and 2 figures;Also includes: 13 refs.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Schilbe intermedius ; Nigeria ; Owalla reservoir ; Nigeria ; Eko-Ende reservoir ; freshwater environment ; Length-weight relationships ; Fish ; Reservoir fisheries ; Sustainable development ; Mutations
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  • 24
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    Incidence of parasitic infestation on the skin and gills of Clarias gariepinus (Burchell) reared under different culture systems (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24091 | 19325 | 2018-05-12 14:38:25 | 24091 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A total of 140 fish samples of Clarias gariepinus comprising of 20 fry from two hatcheries, 60 fingerlings and 60 adults reared under the water recirculating, water flow-through and the earthen pond culture systems, were clinically examined for presence of ecto-parasites on the skin and the gills. The ectoparasitic fauna observed comprises of 3 protozoans including Trichodina sp, Costia sp and Epistilis sp, and 4 metazoans of which 3 are monogenetic trematodes including Gyrodactylus sp, Dactylogyrus sp and Cleidodiscus sp. The fourth metazoan is a leech; Piscicola sp. Infestation due to Trichodina sp and the monogenetic trematodes were observed in all developmental stages of C. gariepinus and under all the culture systems studied. The highest incidence rate of 100% Trichodina sp infestation was observed on both the skin and the gills of the fingerling stage. The highest parasitic load of 10 organisms per field was also observed on the skin of the fingerlings reared in the earthen pond. Infestation due to monogenetic trematodes was observed to be highest (70%) on the skin of fingerlings reared under the water flow through system, while in the earthen pond system, the incidence rate of 60% was observed for both the fingerlings and the adult fish. Costia sp was observed in all the 3 culture, s;ystems, with the highest incidence of 50% and parasitic load of 2. 5 organisms per field recorded on both the fry and the skin of the fingerlings reared in earthen pond. The incidence of Epistilis sp infestation on the gills of catfish fingerlings reared in the water recirculating system was observed to be low (5%), while Piscicola sp infestation was observed only on the skin of adult C. gariepinus at an incidence rate of 35%, but with a high worm burden of 15 organisms per fish. The fingerlings seem to be more susceptible to Trichodina sp and the monogenetic trematodes, especially under the earthen pond culture system. Catfish hatcheries, especially those producing fingerlings in the earthen ponds must ensure adequate and efficient hygiene practices. They may also need to disinfect their stock appropriately at harvest, prior to distribution to farmers to avoid spread of para sites.
    Description: Includes: 6 tables and 6 figures;Also includes: 45 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Heterobranchus longifilis ; Heterobranchus bidorsalis ; Nigeria ; freshwater environment ; Fish ; Parasites ; Infestation ; Skin ; Gills ; Fish culture ; Recirculating systems ; Fish ponds ; Fingerlings
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  • 25
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    Gonadosomatic index, fecundity and egg size of (Synodontis) S. eupterus (Boulenger) in River Rima, north western Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24089 | 19325 | 2018-05-12 14:34:56 | 24089 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to provide information on gonadosomatic index, fecundity and egg size on S. eupterus from River Rima, North-Western Nigeria, from November 2005 and December 2008. 1,610 samples, comprising of 781 females, 816 males and 13 samples whose sexes could not be identified were examined, giving a female: male ratio of almost 1:1. Gonadosomatic index (GSI), fecundity (F) and diameter of the oocytes (ES) were analysed. Linear regression analysis was used to determine the relationship between GSI, fecundity and egg size with total length (TL), total weight (TW), gonad weight (GW) and gonad maturation stages (MS). Six stages of gonad maturation were established. Mean GSI for female and males were 7.30 0~c6.16SD and 1.05~c1.23SD, respectively. It varied (P〈 0.05) with sex, size class and gonad maturation stage, and exhibited significant (P〈0.05) correlation with fish TL, TW and MS in females but not (P〉0.05) in males. Mean fecundity was 2834.45~c2530.87SD and it correlated most significantly (P〈0.05) with GW; and inversely with MS. Mean egg size was 1.31~c0.33mm. It has non significant (P〉0.05) relationship with TL, TW and MS but significant one (P〈0.05) with GW. Egg size distribution was bimodal, with different sizes of egg in ovaries indicating multiple spawning. This study provided baseline information on some aspects of reproduction which is important in the management of A. occidentalis in River Rima.
    Description: Includes: 4 tables and 2 figures;Also includes: 25 refs.
    Keywords: Ecology ; Fisheries ; S. eupterus ; A. occidentalis ; Nigeria ; Rima R. ; Gonadosomatic index ; fecundity ; oocyte diameter ; gonad maturation stage ; S.eupterus ; freshwater environment ; Gonadosomatic index ; Fecundity ; Fish eggs ; Size ; Reproduction ; Fish ; Spawning ; Frequency ; Oocytes
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  • 26
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    Microbial occurrence on differently preserved tilapia fish in Abeokuta North Local Government, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24094 | 19325 | 2018-05-16 13:01:01 | 24094 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study reports the microbial flora of differently processed tilapia fish obtained from Olomoore market, Abeokuta, Nigeria. Samples were purchased, differently processed (using smoking, salting, freezing) and analyzed for the presence of bacteria. Microbial loads and characterisation were examined on the gills and the skin using standard microbiological procedures. The progression of growth was also monitored within I0-day storage period for the differently processed fish. 〈i〉Proteus vulgaris, Leuconostoc meseritiroides, Klebsiella planticola〈/i〉, Pseudomonas spp, 〈i〉Staphylococcus aureus, Bacillus subtitles〈/i〉, Enterobacter spp, 〈i〉Proteus vulgaris〈/i〉, Lactobacillus spp. were the bacteria isolated from the differently processed fish. There was no significant difference (P~B 0. 05) in the bacteria load of the gill during the first day of processing. However, significant variation (P~B 0. 05) existed in the bacteria load of the skin of the fish during the first day of processing. Although no significant difference (P~B 0. 05) was recorded in the bacteria load of the gill and the skin of the fish during the first day of processing in nutrient agar medium. In the tenth day frozen fish gill had the highest bacteria load while smoked fish gill had the lowest bacteria load there was significant difference (P~B 0. 05) in the bacteria load on the gill of differently processed fish gill. Similarly, there was significant variation (P~0.05) in the bacteria load of the skin of the fish during the tenth day processing.
    Description: Includes: 3 tables;Also includes: 29 refs.
    Keywords: Fisheries ; Proteus vulgaris ; Leuconostoc meseritiroides ; Klebsiella planticola ; Staphylocoooccus aureus ; Bacillus subtilis ; Nigeria ; Bacteria ; Microbial ; Occurrence ; Tilapia ; Smoking ; Salting ; Boiling ; freshwater environment ; Microorganisms ; Fishery products ; Processing fishery products ; Fish ; Gills ; Fish diseases ; Skin ; Bacterial diseases ; Pathogens
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  • 27
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    Issues limiting the expansion of brackish water aquaculture in the coastal area of Niger Delta (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24093 | 19325 | 2018-05-12 14:42:46 | 24093 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Brackish water Fish Farming is a type of aquaculture that is practiced in the coastal areas. This involves culture of quality fin and shell fishes that are found in the creeks, lagoons and estuaries. It has a capacity and potential of bridging the wide gap between fish demand and supply in these areas. The development of brackish water aquaculture in Niger Delta started many decades ago, its growth and expansion since then has been limited, unlike freshwater aquaculture which has recorded phenomenal growth in recent years. This paper reviews the constraints hindering the effectiveness of the existing conditions of brackish water aquaculture production and also examines the possible solutions to these constraints, for its growth and expansion in the coastal areas of Niger Delta.
    Description: Includes: 6 tables;Also includes: 21 refs.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Niger Delta ; Brackish water ; Constraints ; Niger Delta ; AQuaculture ; Fish ; brackishwater environment ; marine environment ; Brackishwater aquaculture ; Coastal zone ; Finfish fisheries ; Shellfish culture ; Potential yield ; Aquaculture ; Pollution effects
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    Potentials of Prosopis africana for fish smoking in Lake Chad Basin: a review (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24098 | 19325 | 2018-05-16 13:09:44 | 24098 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper examines the importance of Prosopis Africana as the most abundant tree in Baga and environs. Despite its abundance fish processors prefer the other trees that are almost becoming scarce especially Acacia Nolitica for fish smoking. There is need for awareness to adapt the use of Prosopis Africana for environmental sustainability and preservation of other trees not to go into extinction.
    Description: Includes: 2 plates;Also incudes: 12 refs.
    Keywords: Fisheries ; Law ; Nigeria ; Chad L. ; Smoking kiln ; freshwater environment ; Curing ; Fish ; Processing fishery products ; Deforestation ; Environmental degradation ; Wood ; Sustainability ; Sustainable development
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    Some ecological factors of the tropical floodplain influencing the breeding and conservation of Gymnarchus niloticus (Cuvier 1829): a review (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24096 | 19325 | 2018-05-16 14:04:57 | 24096 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Gymnarchus niloticus is the only species of the family Gymnarchidae. It is a popular food fish in most parts of Africa where it is greatly esteemed. In some culture, it is offered as a special gift to leaders during festive seasons, while in some others it is an important part of items presented by a suitor to the parents of a girl at the time of betrothal. It can therefore be inferred that G. niloticus is not only important as food fish with economic significance, but also plays vital roles in the socio-cultural life of some African tribes. The supply of this important species still depends largely on the catch from the wild. However, based on the method of catch, it has been classified as endangered. A close examination of the ecological factors in the floodplain (where it migrates to breed), revealed strong influence on the breeding and survival of the fish. The level of rainfall determines the extent of floodplain inundation, and the abundance and survival of the flora and fauna in the area. These in turn determine the availability of breeding substrates and natural food sources for the various stages of G. niloticus. Therefore, rainfall, the flora and the fauna of the floodplain play vital roles in the breeding and survival of G. niloticus in nature. To ensure the conservation of this important species, controlled propagation strategies that draws on the influence of prevailing ecological factors in the floodplain is recommended. This will ensure conservation, and protect the economic and socio-cultural significance of G. niloticus.
    Description: Includes: 4 figures;Also includes: 36 refs.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Gymnarchus niloticus ; Nigeria ; Ecological factor ; Tropical floodplains ; Breeding ; Conservation ; Gymnarchus ; Tropical floodplains ; freshwater environment ; Flood plains ; Ecology ; Breeding ; Conservation ; Fish ; Food fish ; Commercial species ; Rare species ; Catch/effort ; Ecological distribution
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    The effects of light and dark exposure on growth response of Clarias gariepinus fingerlings reared in glass aquaria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24101 | 19325 | 2018-05-16 13:24:18 | 24101 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was carried out to determine the effect of light and dark exposures on the growth response of Clarias gariepinus fingerlings. A total of 120 four-week old Clarias gariepinus fingerlings (mean weight 0.52g~c0.02) were stocked into 20 litres of bore-hole water in glass aquarium (60x30x30) cm. Complete light, dark and normal photo periods were the experimental conditions evaluated. Growth indices such as mean weight gain and mean increase in standard lengths were significantly (p〈0. 05) highest in the dark exposure with the following values respectively: (4.19 ~c 0.02g) and (4.11 ~c 0.19cm). Also, percentage survival (82.5%) in the dark exposure was higher than light and control (45% and 70% respectively). Light exposure had higher cannibalism rate (42.5%) than the dark and control (0% and 5 % respectively). Deep shiny black skin colouration was observed among the fingerlings in the dark exposure, while those in the light and control experimental conditions exhibited lighter and normal skin colourations respectively. The experimental conditions were not influenced by the water quality parameters (mean pH: 8~c 0.1 and temp: 28.1 ~c 0.60 ~'C) since their values were within the tolerable limit for fish culture throughout the 42 days experimental period.
    Description: Includes: 4 tables;Also includes: 10 refs.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Maiduguri ; freshwater environment ; Fish ; Growth ; Photoperiodicity ; Experimental culture ; Fingerlings ; Cannibalism ; Survival ; Light attenuation ; Fish culture
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    Utilization effects of substituting maize with graded levels of ripe and unripe banana (Musa sapientum) peels in the diet of African catfish (Clarias gariepinus) juveniles (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24102 | 19325 | 2018-05-16 13:27:19 | 24102 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Six diets were produced using graded levels of banana peels (5 %, 10 % and 15 % for both ripe and unripe banana peels) which were compared with the controlled diet containing maize in the diet of C. gariepinus juveniles. Feeds were fed to triplicate groups of ten fish each to satiation twice daily for ten weeks. There were significant differences (p 〈 0.05) in Mean Weight Gain (MWG) and Specific Growth Rate (SGR) amongst the experimental diets. The control diet had the highest MWG (58.40~c 5.27g) and SGR (1.877~c 0.09 %) while the least values of MWG (25.03 g) and SGR (0.35 %) were recorded in Diet 3(15 % unripe banana peels). The Feed conversion ratio, Protein efficiency ratio and Protein intake recorded significant differences (P 〈 0.05) between the control and the experimental diets. Similarly, significant differences (P 〈 0.05) were recorded in Profit Index, Incidence of Cost and Economic Investment Cost Analysis between the control and experimental diets. Histometry analysis of fish organs equality recorded significant differences (P 〈 0.05) between the control and other test diets. Although the Control diet had the best growth performance, it recorded the least profit index (1.87) while Diet 2 (10 % ripe banana) had the highest Profit Index (3.11). Hence, graded levels of plantain peel is a profitable alternative energy source for partial replacement of maize up to 10 % ripe and unripe banana peels in diet of C. gariepinus.
    Description: Includes: 4 tables;Also includes: 22 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Lagos ; freshwater environment ; Fish ; Feeding experiments ; Fish culture ; Nutritional requirements ; Utilization ; Byproducts ; Energy resources ; Nutrients (mineral)
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    Graded level inclusion of melon shell in the diet of hybrid catfish (Heteroclarias) as energy source (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24103 | 19325 | 2018-05-16 13:44:13 | 24103 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Utilization of agricultural waste- melon shell by hybrid catfish (heteroclarias) 3.92 ~c 0.05g was investigated in this research. Five isonitrogenous diets containing 40% crude protein with inclusion levels of melon shell meal (MSM) at 0%,25%,50%, 75% and 100% in replacement of maize meal was fed to heteroclarias species for 56.days. The results indicated significant differences (P〈0.05) in the growth parameters and body compositions. Diet containing 50% melon shell meal gave a significantly high mean weight gain, specific growth rate, protein efficiency ratio, apparent protein utilization and low feed conversion ratio respectively. The experiment supported the inclusion of melon shell meal up to 50% without detrimental effects on the growth of the fish.
    Description: Includes: 4 tables and 1 figure;Also includes: 14 erfs.
    Keywords: Ecology ; Aquaculture ; Nigeria ; freshwater environment ; Fish ; Byproducts ; Feeding experiments ; Utilization ; Diets ; Nutritional requirements ; Energy resources ; Growth rate
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    Spatial mapping of shellfish marketing in Kure Ultra modern market, Minna, Niger State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24105 | 19325 | 2018-05-16 13:50:13 | 24105 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Geographic Information system and Remote Sensing in the field of marketing is used in this study to open up a wide range of its possible applications as the study assessed shellfish marketing in Kure Ultra Modern Market Minna Niger State. The aim was to develop a database of various shellfish product on sale at the market. The demographic profile, socio-economic characteristics of the marketers and problem associated with the marketing, 100 questionnaires were administered the analytical tool used were frequency distribution, tables, percentages and cost-benefit ratio. Returns from the interview and questionnaire were use to verify the result which depicts that both male and female were engage in the business with female forming the majority group (55%) and 45% men. Marketing of the shellfish was profitable which was attributed to realization of the significant of shellfish over meat. The high profit was recorded in raining seasoning (70%) while dry season sales were 30%. Species of shellfish marketed were crayfish, prawn, cockles, snail, shrimps and crabs. The study also shows that the shellfishes mostly sold are in fresh form (85%) while 15% are in dry form. Daily sales ranges from N1000-N5000, majority of the respondents (75%) patronize low-cost transportation means between N500-N1000. In every enterprise there must be a problem; most of the problem encountered by the respondents were lack of constant supply from the landing site which is mostly marine environment, inadequate storage facility, poor transportation, high tax charges and theft; all this attribute data and the co-ordinate of the selling point at the market were put into ArcGIS environment. Base on the findings, recommendations were profiled to the government and database kept for references.
    Description: Includes: 4 tables and 4 figures;Also includes: 9 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Geographic information system ; Remote sesing ; Attribute Data ; Database ; marketing ; Distribution channels ; Cost and returns profit ; Spatial mapping ; freshwater environment ; Shellfish ; Mapping ; Marketing ; Fish ; Socioeconomic aspects ; GIS ; Remote sensing ; Distribution
    Repository Name: AquaDocs
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    Sensory evaluation of fish spring roll produced from tilapia and catfish (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24104 | 19325 | 2018-05-16 13:46:24 | 24104 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Acceptance of fish spring roll produced from Tilapia and Catfish were evaluated in an attempt to explore the possibilities of better utilization of undersized Tilapia and Catfish species. The products were produced with cooked potatoes (20%) egg (0.5%), milk (0.21%), butter(10.47%), flour(41.87%), vegetable oil(16.75%), carrot(0.46%), pepper (0.04%), made up to 100% with 10% inclusion of Tilapia in Tilapia spring roll and Catfish in Catfish spring roll. Tilapia and Catfish were boiled in a boiling pot before deboning for 10 minutes and then mashed for 5 minutes. The vegetables were chopped and steamed in a steaming pot for 5 minutes. 41.87% of flour was mixed together with steamed fishes and vegetable and rolled out into cylindrical shape of one inch thickness, deep fried in 800ml of vegetable oil and then allowed to cool. The acceptance was evaluated with 25 man panel based on taste, flavor, colour and texture. 80% of the panelist preferred spring roll made from Tilapia to those made from Catfish. 90%$ like the texture and flavor of spring roll made from catfish than that of Tilapia. There was higher consumer acceptability for spring roll made from Tilapia. In the flavor and colour of the spring roll, there was no significant difference observed between rolls made from catfish and Tilapia. Commercialization of these products can contribute to diversification in the fish industry through better utilization of undersized Tilapia and Catfish.
    Description: Includes: 1 table and 1 figure;Also includes: 7 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Ingredient ; Recipes ; Production ; Preparation ; Qiality and nutrition ; Fish spring Roll ; freshwater environment ; Sensors ; Evaluation ; Fish ; Feeding experiments ; Utilization ; Minced products ; Animal nutrition ; Fishery products
    Repository Name: AquaDocs
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    Survey of physical characteristics of the upper reaches of new Calabar River, Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Physico-chemical parameters in relation to fish production of Dadin Kowa Dam, Gombe State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Extraction and structure elucidation of natural compounds of some gorgonians of the Persian Gulf and also physiological and pharmacological effects of gorgonian extract on some selected organisms (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Biology
    In:  http://aquaticcommons.org/id/eprint/19419 | 17408 | 2016-01-22 09:16:53 | 19419 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-06-28
    Description: In the present research, investigations were carried out for structure elucidation of natural compounds and also for studing biological and teratogenical effects of two Genus of soft corals named as " Echinogorgia cf. indica" and "Sinularia erecta" in Persian Gulf. First, 350 gr Echinogorgia was extracted by Acetone, then, the extract was separated by ether from aqueos phase to give 4.5 gr oil. The oil eluted with Petrol - ether Et2 o (9:1) which was recovered Linderazulene and it's derivative as purple Cristals (350 mg/ca 0.1 %). In order to determine molecular structure, the Samples were used for spectroscopic method as: H1- NMR , C13- NMR and 2D NMR. Also, for extraction and structure elucidation of natural compounds, the soft coral " sinularia erecta " were used 1187/37 gr and extracted by Aceton. The extract was concentrated and resulting aqueous suspension and extracted by using ether to give 8.41 gr oil. The oil , was Chromatographed on a column of silica gel and some different fractions were gathered. Initial fraction (1-11) which were nonpolar compounds were seprated by GC/MS. Mass spectrum were prepared and much compounds were recognized.
    Description: PhD
    Description: Advisors:Sh. Oryan, Ab. Rustaiyan Counsellors:K. Parivar, K. Zareh. The full text document is in Farsi only so it has not been possible for AC Editors to check the metadata input.
    Keywords: Biology ; Chemistry ; Fisheries
    Repository Name: AquaDocs
    Type: thesis
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    Physico-chemical and bacteriological investigation of fish and water in Aiba reservoir, Iwo (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23326 | 19325 | 2018-04-06 16:03:20 | 23326 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study looked into the physicochemical and bacteriological investigation of fish and water in Aiba Reservoir. Water and fish samples collected were studied to assess their bacteriological and physicochemical characteristics and their suitability for domestic purposes. Structural questionnaires were administered to the fishermen around the reservoir and experiments were carried out in the laboratory to analyze the samples. The results showed that the total viable bacteria count was high(1.02 x 105 cfu/ml) while few Staphylococcus aureus and E. coli occurred insignificantly. The population of S. aureus and E. coli in the fish gills, liver and tissue were insignificant. The results obtained from the physicochemical analysis of the water samples showed that the reservoir has optimum water temperature of 29degreesC ~c 0.25, a pH of 7.70 ~c 0.20, dissolved Oxygen level of 7.20mgO2/1 ~c 0.20 and total hardness of 45.00 mg/ICaC03 ~c 1.05. The microbial load in the fish sample is higher than that in the water sample. Further strict hygienic measures and surveillance is recommended so as to improve the water quality and to avoid deleterious effects on the health of the Iwo inhabitants and its neighboring communities who also benefit from the reservoir.
    Description: Includes:- 2 figs.;11 refs.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Aiba Reservoir ; freshwater environment ; Physicochemical properties ; Bacteriology ; Water quality ; Water ; Bacterial counters
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    Comparison of diploid and triploid Heterobranchus bidorsalis using Polyacryl Amide Gel Electrophoresis (N-PAGE) (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23409 | 19325 | 2018-04-12 09:02:51 | 23409 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A comparative analysis on biochemistry and Polyacryl Amide Gel Electrophresis was carried out to determine the genetic diversity of diploid and triploid Heterobranchus bidorsalis. Sixteen samples of diploid and triploid farm-raised (mean weight; 512.6g and mean length; 41.6cm) were collected and the electrophoresis analysis was conducted using 5.5% Polyacryl Amide Gel and serum protein obtained from the blood of the live samples. 0.06% Coomassie blue was used for staining the gel while a mixture of ratio 1:2 of glacial acetic acid, meethanol and distilled water was used for de-staining the gel. The diploid and triploid possessed an equal total number of 23 electrophoretic protein bands. The molecular phylogenetics of both samples revealed low genetic variability. Results of this study will serve as a baseline analysis on the current genetic diversity of H. bidorsalis in Nigeria.
    Description: Includes:- 2 figs.;8 refs.
    Keywords: Fisheries ; Heterobranchus bidorsalis ; Nigeria ; Kontagora L. ; freshwater environment ; Genetics ; Diploids ; Experimental culture ; Nutritional requirements ; Fish
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    Primary production and physico-chemical parameters of a freshwater fish farm in the south east Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23410 | 19325 | 2018-04-12 09:04:25 | 23410 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Comparative primary production in Little Stream Farms, near Uyo was investigated in relation to physico-chemical parameters of the adjacent perennial stream and the fish ponds. Except for temperature, which showed the same values for both stations, physico-chemical variables generally showed significant difference (P〈O.05) between the pond water and the adjacent stream. Values of silicates, Turbidity (NTU), Secchi Disc Transparency and Total Suspended Solids (TSS) exhibited significantly variable trends (P〈O.05), especially in the stream water, in response to the commercial sand dredging activities upstream from the fann location. Lowest value of stream transparency (O.1M) recorded was during the peak of the sand dredging, whereas the stream water showed absolute transparency in the absence of the dredging. The water quality parameters also exhibited a general trend of significant seasonal variation (P〈O.05). Five phytoplankton families: Bacillariophyceae, Chlorophyceae, Cyanobacteria, Euglenophyceae and Dinophyceae occurred in the ponds, while three families, Bacillariophyceae, Chlorophyceae and Cyanobacteria occurred in the stream. Bacillariophyceae showed the highest relative abundance in both stations A and B.
    Description: Includes:- 1 table.;3 figs.;11 refs.
    Keywords: Aquaculture ; Chemistry ; Ecology ; Nigeria ; Akwa Ibom State ; freshwater environment ; Physicochemical properties ; Freshwater ecology ; Water quality ; Phytoplankton ; Suspended particulate matter
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    Anaesthetic effects of potassium permanganate on Heterobranchus bidorsalis (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23401 | 19325 | 2018-04-12 08:51:22 | 23401 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Heterobranchus bidorsalis fingerlings were exposed to the concentration of 0.10, 0.15,0.20,0.25 and 0.30 g/l of potassium permanganate in replicates. The anaesthesia and recovery rates were studied. The 24 hours LC50 of H. bidorsalis fingerlings exposed to potassium permanganate was 0.20g/1. The effects of potassium permanganate increased with increase in concentrations and duration of exposure to certain extent, the anaesthetic time linearly decreased as the concentrations and temperature increased while the recovery time increased from 1- 5min as concentrations increased. The effects of potassium permanganate was reflected in the fish swimming pattern, rapid opercula movements, hyperactivities, surfacing and leisions during exposure for 24 hours. pH, temperature, dissolved oxygen concentration, salinity and conductivity of the test media showed slight increases. Potassium permanganate is a potent anaesthetic for H. bidorsalis and most effective at the concentrations of 0.10-0.20g/l.
    Description: Includes:- 2 tables.;1 fig.;10 refs.
    Keywords: Aquaculture ; Heterobranchus bidorsalis ; freshwater environment ; Anaesthesia ; Anaesthetics ; Fish
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    Assessment of water quality parameters in Lake Alau (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23404 | 19325 | 2018-04-12 08:55:07 | 23404 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physico-chemical parameters of Lake Alau were monitored for four months to assess the water quality. Parameters such as temperature, transparency, conductivity, dissolved oxygen, biochemical oxygen demand, Ca, P, etc were studied in five stations (A, B, C, D and E). Water samples were collected monthly from 8:00 to l2:00noon, for four months (July - October 2008, wet season) and analysed. The physico-chemical parameters were within the ranges of unpolluted water bodies. Variation occurs in almost all the months of the study. Significant difference (P〈0.05) occurred in pH, transparency and Ca among the stations, and insignificant difference (P〉0.05) in temperature, conductivity, dissolved oxygen, biochemical oxygen demand, Mg and P. These variations may be due to effects of fertilizer application, herbicides and insecticides in irrigated farms around the Lake.
    Description: Includes:- 2 tables.;24 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Alau L. ; freshwater environment ; Physicochemical properties ; Water quality ; Temperature ; Turbidity ; Transparency ; Dissolved oxygen
    Repository Name: AquaDocs
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  • 43
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    Effects of freezing on the proximate composition and sensory quality of stored African catfish (Clarias gariepinus) and tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24189 | 19325 | 2018-05-16 14:59:40 | 24189 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The objective of this study was to determine the quality deterioration of African catfish Clarias gariepinus and Tilapia, Orechromis niloticus stored at-4~'C for 8 weeks. Weekly analysis was conducted to measure protein, moisture, crude fat and ash content and evaluation of the sensory quality. The result clearly reveals that during storage, both the samples showed a highly significant (p〈0.05) decreasing trend in protein, lipid, ash and moisture content. The result shows that protein, moisture, fat and ash content of the fish samples decreases with increasing duration of frozen storage. The fresh samples has the highest value of protein, moisture, fat and ash content while the least value was recorded on the 8th week. 19.98 ~c 2.66%, 80.71 ~c 1.65%, 3.92 ~c 0.5% and 2.52 ~c were recorded for freshly prepared Clarias gariepinus respectively while 12.62 ~c 1.22%, 66.86 ~c 0.68%, 1.08 ~c 1.04% and 1.14 ~c 0.33% were recorded on the 8th week respectively. 20.80 ~c 1.46, 60.75 ~c 2.50, 9.75 ~c 2.50% and 5.85 ~c 2.51% were recorded for freshly prepared Oreochromis niloticus respectively while 25.05 ~c 2.20%, 47.60 ~c 2. 15%, 7.1 ~c 0.20 and 3.00 ~c 2.10% were recorded on the 8th week respectively. After 8 weeks, the total decrease was 7.36%, 13.85%, 2.84% and 1.38% respectively for Clarias gariepinus and 3.75%, 13.45%, 2.65% and 2.85% respectively for Oreochromis niloticus. Sensory evaluation of the fish samples revealed that quality, texture, colour, odour, aroma and taste decrease with increasing duration of storage and best quality obtained when freshly prepared.
    Description: Includes: 4 tables.;Also includes: 11 references
    Keywords: Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Owo ; Frozen ; Fish ; Quality ; Sensory ; Evaluation ; Processing ; freshwater environment ; Chemical composition ; Freshwater fish ; Receptors ; Deterioration ; Quality assurance ; Fish storage ; Freezing storage ; Nutritive value ; Microorganisms ; Enzymatic activity ; Processing fishery products ; Storage effects ; Organoleptic properties ; Temperature effects
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    The anaesthetic effects of clove seed in selected species of grey mullets, Liza falcipinnis and Liza grandisquamis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24225 | 19325 | 2018-05-19 07:13:31 | 24225 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The anaesthetic effects of Clove Seed extract in two species of grey mullets Liza falcipinnis and Liza grandisquamis were assessed. A total of 120 of these species comprising 60 L. falcipinnis with 30 each of fingerlings (mean length 9.86cm ~c l.ll SD: mean weight 21.20g ~c 2.10 SD) and juveniles (mean length 17.24cm ~c l.88 SD; mean weight 66.24g ~c 4.24SD) and 60 L. grandisquamis also consists of 30 each of fingerlings (mean length 10.24cm ~c 1.92 SD; mean weight 23.41 ~c 2.21 SD) and juveniles (mean length 18.21cm ~c SD; mean weight 71.21g ~c 4.12 SD) were Sampled from the recruitment ponds at African Regional Aquaculture Center, (ARAC), Buguma, Rivers State and were exposed to clove seed extracts at different concentrations of 0.0mglL (control), 5.0, 10.0, 15.0, 20.0 and 25.0mglL. The results obtained indicated a size related response to Clove seed extracts. The induction time in both species were found to decreased significantly (P〈0.05) as the concentrations of the clove extracts increased with the shortest induction time 55.61(s) observed in fingerlings of L. grandisquamis, while the longest 210.61(s) was recorded in juveniles of L. falcipinnis. However, the recovery time increased significantly with increasing concentration of the clove seed, with the highest recovery time 350.11(s) observed in L. falcipinnis at 25.0mglL concentration and the lowest 246.91(s) in L. grandisquamis at 5.0mglL concentration of the clove extracts, with the optimum dosage of 10.0mg/l and 15.0mg/l of fingerlings and juvenile sizes respectively. Interestingly, the survival of the exposed fish during the trial was 100% in both sizes of the two species. No mortality was recorded in all concentrations of the plant extracts. The findings of this trials indicated that clove seed extracts was effective, producing minimum stress and zero mortalities and therefore can be recommended as an effective anaesthetic for use in aquaculture.
    Description: Includes: 27 references.
    Keywords: Aquaculture ; Liza falcipinnis ; Liza grandisquamis ; Nigeria ; Rivers State ; Anaesthetic ; Clove ; Seed mullets ; aquaculture ; brackishwater environment ; Anaesthetics ; Seeds ; Brackishwater fish ; Juveniles ; Fish ponds ; Recruitment ; Size ; Comparative studies ; Aquaculture techniques ; Fish ; Biological stress ; Fingerlings ; Fish culture
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  • 45
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    Microbiological status of water and fish samples from Jabi Lake, Abuja (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24224 | 19325 | 2018-05-19 07:11:26 | 24224 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Jabi Lake is a natural water body in Abuja Federal Capital Territory (FCT). It was expanded for commercial fishing following relocation of Nigeria's headquarters to Abuja in 1993. Quantitative analysis of microbiological status of water and fish from the Lake was carried out. Samples were collected from the dam site, open water, middle lake and inlet. Result reveal that total coliform count which are indicators of pollution are high (2.0 x 103 cfu/ml, 1.1 x 103 cfu/ml, 1.0 x 103 cfu/ml and 1.1 x 103 cfu/ml for dam site, open water, middle lake, and inlet respectively). Total viable count too is high (9.2 x 103 cfu/ml, 4.9 x 103 cfu/ml, 4.6 x 103 cfu/ml and 4.9 x 103 cfu/ml for dam site, open water, middle lake and inlet respectively). There are no coliform bacteria in the muscle of the fish. High bacterial load is an indication of biological pollution and these calls for restraint on the side of those who are using the lake as site for refuse dump.
    Description: Includes: 10 references.
    Keywords: Fisheries ; Pollution ; Nigeria ; Jabi Lake ; Jabi lake ; Water ; Fish ; Bacteria ; freshwater environment ; Microbiology ; Fish ; Pollution ; Water pollution ; Lake fisheries ; Fishery surveys ; Bacteria ; Baseline studies ; Water sampling ; Microbial contamination ; Muscles ; Freshwater fish ; Pollution surveys ; Water analysis ; Freshwater pollution
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  • 46
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    Prevalence of Camallanus cotti in Poecilia reticulata obtained from some waste water drains in Lagos State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24239 | 19325 | 2018-05-20 05:29:09 | 24239 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One way to diversify Nigeria's economy is to improve on agricultural activities with low import input but high export potential such as the promotion of the ornamental fish industry. Poecilia reticulata is one such fish species that enjoys international acceptability. However, a potential bottleneck in its international trade is the decertification of exports from Nigeria in the uncertainty of standing parasite fauna of locally available stock of Poecilia reticulata. Four Streets in different local government areas of Lagos State were identified with existing populations of P. reticulata where collection of samples with a scoop net was done before sorting into 60 male and 60 female individuals per wastewater drain from each Street was carried out monthly between March, 2004 and February, 2005. Temperature, pH, Dissolved Oxygen (DO), water transparency and drain depth were measured with mercury-bulb thermometer, ARH-l CE electronic meter, Oxyguard electronic probe, secchi disc and calibrated pole respectively. Chi-square was used to test for sex-related differences in prevalence and ANOVA for differences in physicochemical analyses. Only 3.4% of the 4,320 samples examined were infected with C. cotti. There was no sex-related differences in the prevalence of C. cotti while only Dissolved oxygen (DO), transparency and drain depth were found to be significantly different among the wastewater drains on the four Streets. The highest prevalence of 15.0% was obtained in P. reticulata females obtained from Igi-Olugbin and Adenaike Alagbe Streets in September, 2004. High prevalence clustering, correlated with receding rains. However, mean monthly temperature, transparency and drain depth were significantly different across drain (p〈0.05). P. reticulata obtained from these four Streets can be further exploited for import substitution and export market since this prevalence level can be managed and does not rival records of C. cotti in other popular export sources in Asia.
    Description: Includes: 11 references.
    Keywords: Ecology ; Fisheries ; Health ; Poecilia reticulata ; Camallanus cotti ; Nigeria ; Lagos State ; Poecilia reticulata ; freshwater environment ; Ornamental fish ; Fishery industry ; Fish ; Waste water ; Exploitation ; Trade ; Comparative studies ; Shellfish ; Parasite control ; Endoparasites ; Parasitic diseases ; Freshwater pollution ; Drainage water
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  • 47
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    Threats to fish biodiversity conservation in Echara River, Ebonyi State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24111 | 19325 | 2018-05-16 14:20:32 | 24111 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study on threats to fish species conservation in Echara River, Nigeria was carried out from September 2009 to February 2011 to generate inferential data for Fisheries policy formulations to assess the potential of the Fishery to alleviate malnutrition among the poor in the rural communities, and use of the living resources for teaching and research. A total number of 709 fishes comprising of Fin-fishes and shell-fishes belonging to 13 families, 19 genera and 40 species were caught in 216 fishing efforts, at 10 days interval using hooks and lines (size 13), cast nets, gill nets and traps of mesh sizes of 50mm, 75mm and l00mm respectively. Fish identification was done using taxonomic keys. Evaluation of fishing methods of the Artisans within the basin was by visual survey and the use of structured questionnaires. It was observed that during the dry season, 55% of artisanal Fishers used obnoxious methods to catch fish, ranging from chemical toxicants (14%), unselective Fishing gears (35%) and direct draining (6%). It was concluded that there is an urgent need for monitoring the impacts of human activities on freshwater systems and to evolve appropriate implementable management strategies, backed up by political will to check anthropogenic impacts that have deleterious effects on the fishery.
    Description: Includes: 2 figures and 1 plate;Also includes: 8 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Ebonyi R. ; freshwater environment ; Fish ; Biodiversity ; Conservation ; Inland water environment ; Taxonomy ; Identification ; Species ; Catching methods ; Evaluation ; Artisanal fishing ; Collisions ; Overexploitation ; Pollution ; Climatic changes ; Fishery surveys ; Fishery policy
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    Effects of synthetic and non-synthetic hormones on the fecundity of Clarias gariepinus: a review (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24112 | 19325 | 2018-05-16 14:23:20 | 24112 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper reviewed the effect of synthetic and non-synthetic hormones on the fecundity fertilization, hatching, latency period and ovulation of Clarias gariepinus. The reviewed result confirmed the necessity of stimulating fecundity in Clarias gariepinus with hormones complexes. The effectiveness of synthetic hormones over the non-synthetic hormones in fecundity stimulation and the highest fecundity level, hatching and fertilization recorded was from the synthetic hormonal sources. Hormonal substances influenced greatly fecundity, ovulation, fertilization of Clarias gariepinus but the technical- know- how involved in getting the non-synthetic hormone such as pituitary is very difficult and rigorous which makes the synthetic counterpart preferable.
    Description: Includes: 20 refs.
    Keywords: Biology ; Aquaculture ; Clarias gariepinus ; Nigeria ; Synthetic ; Hormones ; Fecundity ; Clarias gariepinus ; freshwater environment ; Fecundity ; Hormones ; Fish ; Reproduction ; Induced breeding ; Pituitary gland
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    The nature of fishing community in Nigeria: a case study of Itowolo fishing community, Lagos (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24109 | 19325 | 2018-05-16 14:11:01 | 24109 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Itowolo is a fishing village being boarded with Lagos lagoon on nearly every side except the southern part which opened to the Ikorodu road from Mile 12 part of Agboyi - Ketu Local Council Development Area. During the raining season, the water level increases which possibly cause flood at heavy down pour while low water level of higher salinity during the dry season. The indigenes are primarily fisherfolks and they are effective in their fishing activities by having individual functional canoe ranging from small unmotorised paddled dugout type to outboard ones. The main gears used for fishing in the area are cast nets, gill nets, traps, hooks and lines among which cast net is prominently used Their landings during the raining season involve different species of fishes such as Heterobranchus species, Heterotis species, Channa species including others while tilapia of different species take the greatest percentage of their catches during the dry season. The shrimps top the population of catches between the months of July September. The dwellers during off fishing season engage in other economic activities that generate income such as petty trading, palm tapping, fuel wood trading, transport business, mat making, hairdressing, fashion designing, computer business centres and telecommunication vendors. In general, fishing activities are characterized by low unit productivity, intensive labour, relative low capital, low operational costs and limited gear coverage. High post harvest losses are usually experienced due to lack of suitable storage facilities which eventually lead to relative low profit.
    Description: Includes: 3 tables and 3 figures;Also includes : 5 refs,
    Keywords: Fisheries ; Sociology ; Nigeria ; Fishing communities ; Fishing household and change ; Artisanal fishing ; Fishing vessels ; Fishing gear ; Cast nets ; Fish ; Catch statistics
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  • 50
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    The role of biotechnology in aquacultural development in Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24114 | 19325 | 2018-05-16 14:27:57 | 24114 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The paper reviews some relevant approaches to the use of biotechnology for aquaculture development in Nigeria. Such approaches include: biotechnology through genetic manipulations, selective breeding, hybridization, molecular marker, assisted selection, transgenesis, inbreeding, induction of polyploidy and cell nuclear transplantation. Problems facing the use of these technologies were discussed under limited (research facilities, funding and skills), lack of suitable domesticated species, religious constraints, and ecological risk hazards associated with genetically modified fish. Few suggestions were proffered as panacea to the problems. When such solutions are adequately applied, the overall effect will improve productivity and bring about the needed reduction in the gap between demand and supply of aquaculture produce.
    Description: Includes: 14 refs.
    Keywords: Aquaculture ; Nigeria ; Biotechnology ; Aquaculture ; Role ; Development ; Associated ; Nigeria ; freshwater environment ; Biotechnology ; Aquaculture development ; Aquaculture ; Seed collection ; Fry ; Fish ; Hybrids ; Genetically modified organisms
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    Induced breeding of Clarias anguillaris with Xenopus leavies (African clawed frog) crude pituitary glands (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24113 | 19325 | 2018-05-16 14:26:02 | 24113 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Ripe C. anguillaris, size ranging from 350-700g total body weight (TBW), were treated with frog (Xenopus laevis) crude pituitary glands at four treatment levels of 1 pituitary, 2 pituitaries and 3 pituitaries per broodstock of mean weight 434.44 ~c 79.39g and Ovaprim for control. Each treatment was replicated three times. The frogs weight ranged from 39.40- 60.00 g. The latency period before successful stripping was 14 hours with one pituitary hormone dosage, 12 hours with two pituitaries and 9 hours with three pituitaries. Eggs were incubated at temperature range of 26 - 27~'C. Hatching started after 24 hrs and was completed by 36 hrs of incubation. Egg yield or fecundity was observed to vary according to the dosage of pituitary glands administered. Two pituitary glands injection yielded the highest egg number with mean fecundity of 43749~c 3005 followed by one pituitary gland treatment with mean fecundity of 34786 ~c 5386. Three pituitary glands treatment gave the least fecundity of 26007 ~c 4360. Percentage fertilization and hatching of the eggs were also higher in two pituitary glands treatment with 98% fertilization and hatching. This was followed by one pituitary (98% fertilization and 75.% hatching) and three pituitary glands with 98%fertilization and 62% hatching. The fries were reared for 8 weeks. Mortality was observed to be highest during the second week in all the three treatments. Treatment two (2 pituitaries) still had the highest survival of 68.40% followed by treatment one (1 pituitary) with 29.60% survival and treatment three (3 pituitaries) with only 4.80% survival. The stock stabilized and no mortality (0%) was recorded from 3rd to 8th weeks of rearing. Results indicated that 2 pituitary glands treatment was most effective followed by 1 and 3 glands treatments respectively. Weight of frogs and their respective pituitaries and weight of fish appeared to have relative effects on their productivity. Three frogs (F) of mean weight 67.52 ~c 33.70 were observed to be an over dose to a fish of 434.44 g mean weight.
    Description: Includes: 2 tables;Also includes: 10 refs.
    Keywords: Aquaculture ; Clarias anguillaris ; Xenopus laevis ; Nigeria ; Clarias anguillaris ; breeding ; Frog pituitary ; freshwater environment ; Induced breeding ; Fish ; Pituitary gland ; Fecundity ; Hatcheries ; Aquaculture ; Brood stocks
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    Preliminary studies on some physico-chemical parameters and fish species composition of Doma Dam, Nasarawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24638 | 19325 | 2018-05-24 09:36:38 | 24638 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study of some Physico-chemical parameters and fish species composition of Doma Darn was carried out between the month of August 2012. Fishing communities along the dam were selected at sampling stations and collection of fish species. The values of physico-parameters obtained for stations were in the range of 28.10-92 m for depth, 27.70-28.48~'for temperature, 7.03-7.64 for PH, 7.23-7.64mg/l for dissolved oxygen (DO), 30.08-31.75 ntu for turbidity, 94.64-105.17mg/l for alkalinity and 79.17-80.58mg/l for total hardness. The result indicated that there was significant difference (p〈0.5)for depth, temperature turbidity and alkalinity, while there was no significant difference (p〈0.05) for DO, pH and water hardness among the stations. The result of these parameters among the duration shows that there was significant different (p〈0.05) in all the parameters except pH. The study revealed that there were twenty-five (25) fish species belonging to 12 families in the dam. The family Cichlidae and Mochokidae and Bagridae which has three each, While the family, Polypteridae, Channidae, Centropomidae, flepsetidae and Protopteridae has the lowest number of one (1) each. The overall result revealed that the Phvsico-chemical parameters were mostly influenced by duration and not much by stations; and parametersoaram measured were within the recommended water quality requirement for growth and survival of aquatic organisms.
    Description: Includes: 10 references.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Doma Dam ; Doma Dam ; Fishing community ; Physico-chemical parameter ; Fish species ; freshwater environment ; automation
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    The marketing and distribution of fish in New Bussa fish market area of Niger State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23237 | 19325 | 2018-03-18 15:16:31 | 23237 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish marketing and distribution in New-Bussa market was studied weekly for three months (August -October, 2005). The result showed that the major fish species common in New-Bussa fish market are Clarias,Citharinus,Mormyrus,Bagrus,Alestes, Synondontis,Lates, Chrysicthyes, Tilapia, Hydrocynus and Clarotes. The business of catching, marketing and distribution of fish is controlled by young men and women of the age bracket of 14-40 years old. Over 15 different ethnic groups from 14 states in Nigeria and Ghana, Chad, Benin Republic, Mali are involved in fish marketing and distribution business in New-Bussa. The indigenous ethnic groups are Gungawa, Busawa, Kambari, and Nupe, they formed 65% of the ethnic groups found in New-Bussa. The remaining ethnic groups are migrants. Women dominated the trading and processing of fish.
    Description: Includes:- 4 tables.;7 figs.;5 refs
    Keywords: Fisheries ; Management ; Nigeria ; New Bussa ; freshwater environment ; Marketing ; Market research ; Fish
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    Prospect of retort pouch food technology in the Nigerian fishery industry: an overview (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24187 | 19325 | 2018-05-16 14:56:16 | 24187 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Retort pouch as a packaging material for varieties of food items such as fish, vegetables, fruits and food crops was highlighted. Materials required for the processing of pouches were listed and the methodology of production discussed. The paper provided insight for investors to invest in the technology of pouching as a means of engaging unemployed youths in Nigeria.
    Description: Includes: 3 figures.;Also includes: 6 references.
    Keywords: Fisheries ; Nigeria ; Niger ; Resort pouch ; Packaging ; Processing ; Raw materials ; freshwater environment ; Product development ; New products ; Fishery industry ; Packing fishery products ; Raw materials ; Food technology ; Food ; Fish ; Evaluation ; Testing ; Livelihoods ; Economic benefits ; Packing materials
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    Assemblages of fish species of Ikpa River in Akwa Ibom State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24182 | 19325 | 2018-05-13 19:11:34 | 24182 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species were investigated for 12 calendar months from March 2009 - February 2010 forthnightly using traps, gillnets and cast nets from three sampling stations in Ikpa River. Ornamental fish species were sorted out from the pooled samples. The findings revealed that out of the 2307 fish specimens sampled, 1074 specimens made up of 38 species and 19 families were of indigenous ornamental fish. The highest contributing family in terms of number of species is Cichlidae (10 species) whereas Schilbeidae (593 specimens; 55.21%) is the highest contributor in terms of total number of specimens sampled. This is followed by Mochokidae and Mormyridae with 4 species each and Cichlidae with 158 specimens (14.70%). At the species level, the highest contributor is Physalia pellueida (577 specimens;53.72%)and is followed by Erpetoichthys calabarcus (60 specimens; 5.59%). The least contributors were Heterobranchus bidorsalis, periophthalmus barbarus and Pelyicachromis pulcher (1 specimen; 0.09%). Twelve families recorded only one species each. These great potentials of ornamental fish have been left unexploited and hence, undeveloped. Several species of ornamental fish have been imported into and exported from Nigeria by businessmen. This paper therefore highlights the constraints and also make recommendations for the exploitation and development of ornamental fishery in Akwa Ibom State and its environs.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Fisheries ; Nigeria ; Ikpa R. ; Exotic ; Ornamental ; Indigenous ; Fish species ; Ikpa River ; freshwater environment ; Lake fisheries ; Ecological associations ; Artisanal fishing ; Taxonomy ; Ornamental fish ; Exploitation ; Fish ; Stock assessment ; Potential resources ; Fishery development ; Fishery surveys ; Freshwater fish ; Check lists
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    Bacteriological assessment of smoked fish (Clarias Sp.) around Shiroro Lake area of Niger State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24185 | 19325 | 2018-05-16 14:41:02 | 24185 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Bacteria has been implicated in food poisoning, and smoked fish is not an exception.Generally, fish is highly susceptible to spoilage; therefore this study evaluated the bacteria load in smoked fish from three major locations in Shiroro area of Niger State namely; Gwada, Kuta and Zumba.The smoked fish samples collected from these locations were smeared at both the gills and head regions of the fishes. The bacteria samples identified were Escherichia coli, Bacillus subtilis, Staphylococcus aureus, Staphylococcus epidermis, Pseudomonas aeruginosa, and Samonella typhi, which were common to all the three locations sampled, while only Streptococcus feacaliswas only was found to be present in both Kuta and Zumba location.The frequency of occurrence of these 68 bacteria samples isolated ranges from 8 - 20%, with Bacillius subtilis having the highest occurrence and Pseudomonas aeruginosa have the least occurrence. Out of the total 68 samples, 14 skin samples (20.6%) and 5 gills samples (7.4%) exceeded the acceptable limits of total mesophilic aerobic counts which were 10〈sup〉6〈/sup〉 - 10〈sup〉7〈/sup〉 cfu/g. In the case of total coliform counts, 12 skin samples (17.6%) and 7 gills samples (10.3%) exceeded the acceptable limit which is 4.0 x 102, while in the case of Staphylococcus aureus, 4 skin samples (5.9%) and 2 gills samples (2.9%) exceeded the acceptable limit which is 103 cfu/g. Similarly 3 skin samples (4.4%) and 1 gill sample (1.5%) exceeded the acceptable limit of Salmonella typhi which is 104 cfu/g.
    Description: Includes: 4 tables.;Also includes: 21 references.
    Keywords: Fisheries ; Health ; Escherichia coli ; Bacillus subtilis ; Staphylococcus aureus ; Staphylococcus epidermis ; Pseeudomonas aeruginosa ; Nigeria ; Shiroro L. ; Bacteria ; Smoked (Clarias spp) fish ; Location and recommended values ; brackishwater environment ; freshwater environment ; marine environment ; Bacteria ; Food poisoning ; Cured products ; Fish ; Fish spoilage ; Acceptability ; Lake fisheries ; Gills ; Brain ; Evaluation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 140-144
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    A survey of the fisheries of River Niger at Yauri, Kebbi State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24188 | 19325 | 2018-05-16 14:57:51 | 24188 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A survey of the fisheries of river Niger at Yauri was conducted with the aid of questionnaires administered randomly at four (4) landing sites of Tashan Kasuwa (main market), Gidan-ruwa, Yabon-ruwa and Hutawa. A total of fifty (50) questionnaires were administered in all the villages. From the research work it was found that 76 % of the fishermen operate on full time basis while 24 % operate on part time basis. Out of the 50 fishermen interviewed only 46% were licensed to operate there. The type of fishing gears and equipments used in Yauri are hook and line, cast net, gill net and seine net. About 46 % of the fishermen were found using mesh size less than 2.0 cm. The dominant fish species caught during flood and dry seasons include Clarias spp., Lates niloticus respectively. Higher catches are made in the months of March and April. All the fishermen interviewed (100%) do not process their fish but disposed them off fresh. Sixty percent of the fishermen belong to different cooperative societies, while 40% do not belong to any cooperative society. The problem associated with fishing operation at Yauri includes that of lack of credit facilities, lack of extension agents, and high cost of fishing items, poor road network and remote location of the fishing village.
    Description: Includes: 5 tables.;Also includes: 8 references
    Keywords: Fisheries ; Nigeria ; Yauri ; Niger River ; Fisheries ; Fishing operations ; River Niger ; yauri ; freshwater environment ; Fishery surveys ; Fishermen ; Artisanal fishing ; Seine nets ; Fishing gear ; Fishing ; Equipment ; Fish ; Catch statistics ; Cooperatives ; Financial management ; Extension activities ; Fishing villages ; Locations (working) ; Seasonal variations ; River fisheries
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 152-154
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    Detection of Listeria monocytogenes in frozen fish in Lagos, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24229 | 19325 | 2018-05-19 07:20:47 | 24229 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The objective of this study was to detect Listeria monocytogenes in frozen fish in Lagos, Nigeria. A total of 55 frozen fish from two markets (Iyana-Ipaja and Mushin) were analyzed for the presence of L. monocytogenes using Oxoid Listeria Precis method. Out of the 55 samples analyzed, only 15 were positive for L. monocytogenes. The study showed that L. monocytogenes is a contaminant of frozen fish and may pose serious health implications on consumption of the contaminated fish.
    Description: Includes: 20 references.
    Keywords: Fisheries ; Health ; Listeria monocytogenes ; Nigeria ; Lagos ; Listeria monocytogenes ; Frozen fish ; Oxoid Listeria Precis ; freshwater environment ; Frozen products ; Fish ; Public health ; Bacteria ; Samples ; Fishery products ; Microbial contamination ; Quality assurance
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 307-310
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    Impact of climate change on brackish water aquaculture development in the coastal areas of the Niger Delta (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24602 | 19325 | 2018-05-21 12:18:46 | 24602 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The issue of climate change has generated a lot of concern among the general public in Niger Delta region in recent time. It has been described in different ways by many people based on their views, perception and understanding. However, little considerations has been given to the impact of climate change on brackish water aquaculture in the coastal areas of Niger Delta. This paper therefore review critically based on existing literature and field experience, the causes of climate change, impact of climate change on aquaculture production such as: increase in temperature, flooding of ponds, increase in water turbidity, heavy siltation of pond bottom, introduction of new species, collapse of farms infrastructure and fluctuations in salinity levels. Also, various adaptation and mitigation strategies that will ameliomerate the impact of climate change in aquaculture operations, namely: reduction in human activiies that are inimical, stable climate, selection of good site suitable for fish farming, provision of shading materials for fish cultured in tanks, raising of pond dykes, good management practices and improvement of monitoring and early warning systems, are explicitly elucidated. As these strategies will go a long way in minimizing the impact of this menace, in the brackish water zone of the region. Moreover, efforts should be made by relevant institutions and agencies to come up with coordinated plans and policies that will reduce the effects of climare change on brackish water aquaculture in the coastal areas of Niger Delta.
    Description: Includes: 26 references.
    Keywords: Aquaculture ; Atmospheric Sciences ; Nigeria ; Niger Delta ; Climate ; Fish ; Coastal environment ; Fish farming ; Niger Delta ; brackishwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 140-145
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    Venomics and biological analysis of Scatophagus argus argus (Spotted scat) venom isolated in Persian Gulf, extraction and purification of hemolytic protein (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Biology
    In:  http://aquaticcommons.org/id/eprint/19122 | 17408 | 2015-12-11 10:34:52 | 19122 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Green scat namely as Scatophagus argus argus is a venomous aquarium fish belonging to Scatophagidae family. It can induce painful wounds in injured hand with partial paralysis to whom that touch the spines. Dorsal and ventral rough spines contain cells that produce venom with toxic activities. According to unpublished data collected from local hospitals in southern coastal region of Iran, S. argus is reported as a venomous fish. Envenomation induces clinical symptoms such as local pain, partial paralysis, erythema and itching. In the present study green scat (spotted scat) was collected from Persian Gulf coastal waters. SDS-PAGE indicated 12 distinct bands in the venom ranged between 10-250 KDa. The crude venom had hemolytic activity on human erythrocytes (1%) with an LC100 (Lytic Concentration) of about 1.7 μg. The crude venom can release 813 μg proteins from 0.5% casein. Phospholipase C activity was recorded at 3.125 μg of total venom. Our findings showed that the edematic activity remained over 48 h after injection.The purification of the venom was done by HPLC and 30 peaks were obtained within 80 min but only one peak in 68 min retention time showed hemolytic activity at 90% acetonitril was isolated. The area percentage of the hemolytic protein showed that this hemolytic protein consist of 32 percent of total proteins and its molecular weight was 72 KDa in SDS_PAGE.The results demonstrated that crude venom extracted from Iranian coastal border has different toxic and enzymatic activities.
    Description: PhD
    Description: Advisors:Shahla Jamili, Delavar Shahbazzadeh. Counsellors: Mohammad reza Fatemi, Behrouz Vaziri
    Keywords: Biology ; Chemistry ; Fisheries
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
    Format: application/pdf
    Format: 124
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    Chemical ecology fatty acids of mollusks dominant species in intertidal zone of Chabahar Bay (2021)
    Islamic Azad University, Science and Research Branch, Tehran, Marine Biology
    In:  http://aquaticcommons.org/id/eprint/19197 | 17408 | 2016-02-07 16:50:51 | 19197 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Chemical ecology is the science of study and analysis of natural chemical products in result of biochemical processes in organisms and their reactions to variations of ecological and environmental parameters.In marine chemical ecology the existence of natural products in aquatic organisms and their ecological roles in marine animals and their reactions to environmental parameters variations will be studied.Among them, fatty acids are the most various and abundant ones in natural products which had been extracted from many marine organisms such as mollusks and algae.In this study selected animals were the dominant species of mollusks in intertidal zone of chabahar bay including gastropods, bivalves and polyplacophora classes.Nerita textilis and Turbo coronatus species are among gastropoda, Saccostrea cucullata is from bivalve, and Chiton lamyi is from polyplacophora.After seasonal sampling, separation and identification of natural products of these species, fatty acids had been isolated and identified by GC mass chromatography and their seasonal variations had been identified.In addition environmental factors of the location including pH, salinity temperature, dissolved oxygen, chlorophyll a and nutrients were measured monthly.Then the effect of seasonal variations of environmental factors on fatty acids had been studied by applying statistical analysis.GC/MS resulted thirteen fatty acids, which the most importants were myristic, stearic, oleic, palmitoleic, arachidonic and eicosapentaenoic acids.In majority of species palmitic acid was most abundant than the others and saturatedes had the most percentage levels than unsaturated ones.Although seasonal variations of identified fatty acids was not similar in species, but the majority of unsaturated ones had their maximum during winter, while saturated acids reached their maximum in summer.Statistical Analysis showed the strong correlations between Environmental factors and some fatty acids and temperature, nitrate, silicate and pH had strong correlations in all species.The species was studied from the point of lipid content and the results showed a good quality of lipid content in the selected species in the intertidal zone of Chabahar bay.
    Description: PhD
    Description: Advisors:Peiman Eghtesadi, Ali Mashianchin Counsellors:Isa Iavari, Shahla Jamili. The full text document is in Farsi only so it has not been possible for AC Editors to check the metadata input.
    Keywords: Biology ; Chemistry ; Ecology
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
    Format: application/pdf
    Format: 130
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