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  • Cell & Developmental Biology
  • Chemistry
  • Processing fishery products
  • FISON  (26)
  • Fisheries Society of Nigeria  (23)
  • Windermere, UK  (12)
  • 1
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    The changes in various iron compounds in culture media for algae. [Translation from: Archiv fur Hydrobiologie Supplemente Band 38(1/2) 151-169, 1970.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4839 | 1256 | 2011-09-29 15:49:48 | 4839 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The purpose of this work is a contribution to the quantitative record of the use of iron by planktonic algae. Preliminary experiments with Chlorella to determine the rate of iron intake in the presence of inorganic sources of iron did not produce the desired result. The crucial point of this work is the investigation of the influence of various external factors on the stability of FeEDTA (FeEDTA = Ferric(III)-compound of ethylene-diamine tetra-acetic acid), since this compound appears to be particularly well-suited as a source of iron for planktonic algae (e.g. TAMIYA et al. 1953). Cultures of Chlorella fusca in a light thermostat were used in experimental research. Methods and results are discussed.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Biometrics ; Biological sampling ; Geographical distribution ; Population density ; Population characteristics ; Population number ; Freshwater crustaceans ; Population dynamics
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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    Determination of dissolved oxygen in water with leukoberbelin-blue I. A quick Winkler method. [Translation from: Z.analyt.Chem. 262 97-99, 1972.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4843 | 1256 | 2011-09-29 15:49:28 | 4843 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The reaction of Mn(II) with water-dissolved oxygen, to a higher manganese hydroxide in an alkaline medium, as with the longstanding classic Winkler method, is the first step in the method described here. The assumption for faultless results by the conventional and modified Winkler method is clean water, which contains no organic substances by Mn(III) or Mn(IV). In many cases, however, eg. in river and lake-water tests, it can be seen with the naked eye that after some time the originally brown-coloured precipitate of manganese hydroxide becomes more and more colourless. Oxygen content was analysed in the water samples and evaluated by raising the amount of the leuko-base and giving the corresponding dilution of the colouring matter solution formed still higher oxygen contents can be measured.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Methodology ; Experimental research ; Dissolved oxygen ; Analytical techniques ; Water analysis
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    Type: monograph
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  • 3
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    Nitrogen and phosphorus forms in water and the food requirements of algae. [Translation from: Wiadomosci Ekologiczne 19 238-244, 1973. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4848 | 1256 | 2011-09-29 15:49:18 | 4848 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: When dissolved in water, compounds of nitrogen and phosphorus ought to contain the basic assimilated food requirements for autotrophic plants and therefore autotrophic algae. This article summarises the occurrence of nitrogen in water, how species of algae utilize nitrogen and phosphorus forms for growth and the capacities of algae to adapt to environments of different nutrient wealth. This topic has unquestionable importance not only for the purpose of survival of a species but also in deciding indirectly about the stability of ecosystems.
    Description: Translated from Polish into English
    Keywords: Biology ; Chemistry ; Limnology ; Algae ; Nitrogen fixation ; Nitrogen ; Phosphorus ; Nutritional requirements ; Bacteria ; Organic compounds
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  • 4
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    Physiology of nitrate reduction in Pseudomonas aeruginosa. [Translation from: Z.allg.Mikrobiol. 13, 83-94, 1973.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4856 | 1256 | 2011-09-29 15:48:26 | 4856 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Pseudomonas aeruginosa has for some time been known as a denitrifier. Pseudomonas aeruginosa was chosen for further studies, because P. aeruginosa occurs abundantly in Plusssee and moreover there are contradictory assertions on the gas products of denitrification by this bacteria. In experimental research the pattern of growth and gas production of Pseudomonas aeruginosa on nutrient broth was studied.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Experimental research ; Bacteria ; Freshwater lakes ; Growth ; Microbiological culture ; Plusssee
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    Type: monograph
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  • 5
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    Relationship of dimensions and weight in freshwater planktonic crustaceans. [Translation from: Doklady Akademii Nauk SSSR 84(1) 153-156, 1952. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4857 | 1256 | 2011-09-29 15:48:28 | 4857 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: There is no doubt that determination of the biomass of zooplankton (primarily of crustaceans) will be taken into consideration in practice and limnological works, especially after the recent publication of fairly comprehensive tables of weights of a whole range of species of freshwater copepods and cladocerans. The usefulness of applying formulae of determining the biomass of marine crustaceans for freshwater copepods is discussed.
    Description: Translated from Russian into English
    Keywords: Chemistry ; Ecology ; Limnology ; Freshwater crustaceans ; Zooplankton ; Biomass ; Formulae
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  • 6
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    For the determination of iron (II) and total iron with 2,2'-dipyridyl in mineral waters. Reduction of iron (III) with ascorbic acid [Translation from: Zeitschrift fur Analytische Chemie 209 340-341, 1965] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4877 | 1256 | 2011-09-29 15:47:02 | 4877 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: The determination of bi- and trivalent iron in proximity, in mineral waters has gained in significance, on biological and technical grounds. This short paper describes the procedure of the determination of bivalent iron and total iron in a water sample.
    Description: Translated from German into English
    Keywords: Chemistry ; Limnology ; Iron ; Acids ; Analytical techniques ; Minerals ; Water analysis
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  • 7
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    Nitrification in marine ecosystems [Translation from: Rapp.Naturvardsverket SNVPM No.1213, 157-166, 1980] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4964 | 1256 | 2011-09-29 15:39:04 | 4964 | Freshwater Biological Association
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    Publication Date: 2021-07-07
    Description: The nitrification in the ocean is influenced by several environmental factors and the importance of these is more or less known. There are very likely many more to be discovered in the study of the interaction of nitrification bacteria and other micro-organisms in the ocean. Some of the factors to be considered will briefly be dealt with in this paper. Then the authors give the results of an incubation experiment in the Baltic Sea and from a detailed study in Gullmarn.
    Description: Translated from Swedish into English
    Keywords: Chemistry ; Ecology ; Oceanography ; Marine ecology ; Nitrification ; Experimental research ; Sediment analysis ; Bacteria ; Carbon fixation ; Nitrosococcus oceanus ; Nitrococcus mobilis
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  • 8
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    Ratio of natural isotopes of nitrogen. I. Primary results: soils of Dombes [Translation from: Revue d'Ecologie et de Biologie du Sol 14, 279-287, 1977] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4967 | 1256 | 2011-09-29 15:36:52 | 4967 | Freshwater Biological Association
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    Publication Date: 2021-07-07
    Description: Utilization of the heavy isotope of nitrogen as a tracer has found numerous applications in soil biology. It allows better definition of different stages of the nitrogen cycle, in particular the immobilization-mineralization cycle. In this work, the authors report the results of calculations of natural isotope ratios of nitrogen in samples of water, soil and vegetation prevailing in Dombes and discuss the possibilities of errors and coefficients of fractionation.
    Description: Translated from French into English
    Keywords: Chemistry ; Ecology ; Limnology ; Nitrogen isotopes ; Soils ; Tracers ; Bacteria ; Nitrogen compounds ; France ; Dombes
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    Type: monograph
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  • 9
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    Experiments on the production of a highly dispersible calcium carbonate. ('Experimental section' only) [Translation from: Szklo i Ceramiki 30, 133-136, 1979] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4963 | 1256 | 2011-09-29 15:39:01 | 4963 | Freshwater Biological Association
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    Publication Date: 2021-07-07
    Description: This short translation summarises experiments on the production of a highly dispersible precipitate of calcium carbonate. The translation covers the 'Experimental section' (of the original larger paper) only.
    Description: Translated from Polish into English
    Keywords: Chemistry ; Limnology ; Experimental research ; Calcium carbonates ; Magnetic fields ; Ultrasonic devices
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  • 10
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    Chemical composition of Iraq water resources (abbreviated translation) [Translation from: Vodnye Resursy 1975(4,) 173-185] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4988 | 1256 | 2011-09-29 15:36:31 | 4988 | Freshwater Biological Association
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    Publication Date: 2021-07-07
    Description: This abbreviated translation summarises the chemical composition of Iraq water resources. Among the described water bodies are the River Euphrates, Shatt al Arab River and a number of standing waters.
    Description: Translated from Russian into English
    Keywords: Chemistry ; Ecology ; Limnology ; Inland water environment ; Inland waters ; Water analysis ; Iraq
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  • 11
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    Mechanism of mass transfer in the formation of hydrothermal deposits of sulphides [Translation from: Trudy Inst.Geol.rudn.Mesterozh. 16, 80 [pages 44-46 ”Solubility of sulphides of iron” only], 1958] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4980 | 1256 | 2011-09-29 15:38:06 | 4980 | Freshwater Biological Association
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    Publication Date: 2021-07-07
    Description: This partial translation of the original paper provides the summary of this study of the mechanism of mass transfer in the formation of hydrothermal deposits of sulphides. For determining the solubility of sulphides of iron, the radioactive isotope Fe59 was used. The solubility of two sulphides was determined.
    Description: Translated from Russian into English
    Keywords: Chemistry ; Ecology ; Limnology ; Sulphide deposits ; Sulphides ; Hydrothermal deposits ; Iron isotopes ; Solubility
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  • 12
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    Some data on the content of organic carbon in rivers in the winter months. [Translation from: Gidrochim. Mat. 23, 36-38, 1955] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/5054 | 1256 | 2011-09-29 15:29:08 | 5054 | Freshwater Biological Association
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    Publication Date: 2021-07-08
    Description: Observations are reported on the content of organic matter in the Moscow region in 1941. Some data is given on alkalinity, oxygen content and colourisation of the rivers.
    Description: Translated from Russian into English
    Keywords: Biology ; Chemistry ; Limnology ; Rivers ; Organic matter ; Alkalinity ; Dissolved oxygen ; Colour
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  • 13
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    Analysis of physicochemical characteristics of some freshwater bodies in Essien Udim Local Government Area of Akwa Ibom State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23044 | 19325 | 2018-03-05 20:45:24 | 23044 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-12
    Description: The physical and chemical characteristics of freshwater bodies Ikot Ebak and Abeneyentem streams in Essien Udim Local Government Area, Akwa Ibom State, Nigeria were studied from (July December 1996). The mean values obtained in the two water bodies were pH (6.8~c0.12, 6.8~c0.09, respectively). Conductivity (4.9~c2.26, 5.0~c2.09 iScm-1), total dissolved solid (16~c7.58, 37~c26.9 mg/l), TSS (46~c26.0, 53~c53.1)g/l), alkalinity (17.5~c7.27, 10.7~c8S MgCaCo3/1), DO (6.98~C1.46, 8.3~C29.0mg/1), BOD (2.65~c2.44, 3.15~c2.79mg/1), Salinity (0.41~c0.12, 0.31~c0.04%o') total hardness (0.64~c0.21, 0.84~c0.42mg/l, N03-N (0.31~cO.26, 0.35~c0.29mg/l), and PD4-P (0.022~c0.0199 0.023~c.022mg/1), respectively. There were significant difference in the means of the parameters in the two water bodies except TDS, Alkalinity and Hardness. The water bodies were found to be slightly acidic with low conductivity. The properties in the water bodies were in conformity with international standards for both drinking and aquatic life.
    Description: includes:- 2 tables.;6 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Ikot Ebak ; Nigeria ; Abeneyentem ; freshwater environment ; Physicochemical properties ; Alkalinity ; Salinity ; Dissolved oxygen
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  • 14
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    Effect of cold and hot smoking of Clarias gariepinus on consumer preference (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23062 | 19325 | 2018-03-10 14:32:20 | 23062 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-12
    Description: The objective of this study was to determine the best smoking method that will enhance consumer preference for Clarias gariepinus without affecting negatively the nutritive value. Two methods of smoking were used: cold and hot smoking. The fish were smoked with improvised drum smoking kiln and oven. Smoked fish samples obtained were subjected to chemical analyses and sensory evaluation. Chemical analyses showed that the smoked fish were still rich in protein (66.0067.52%) and fat (9.83-12.28%); while the moisture content ranged between 7.82-8.24% and ash, 12.86-14.16%. There was no significant difference (P〉0.05) in the protein, ash and moisture contents. Significant differences (P〈0.05) were observed in the Calcium(Ca), Potassium(K), Sodium(Na), Zinc(Zn), Lead(Pb), Iron(Fe) and Phosphorus(P) contents. Only hot smoke-dried (HSD) fish samples showed no presence of lead. The levels of sodium(Na) and potassium(K) in the smoked fish were relatively high, though, the amount of potassium(k) was higher. Sensory evaluation results revealed that there were no significant differences (P〉0.05) in the colour and taste ratings of the smoked fish samples. However, significant differences (P〈0.05) were observed in the odour, texture and overall acceptability. Hot smoke-dried and cold oven-dried Clarias gariepinus had the best overall acceptability in ratings.
    Description: Includes:- 1 table.;2 figs.;12 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Fishery products ; Processing fishery products ; Cured products ; Curing ; Mineral composition
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  • 15
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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
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    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
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  • 16
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    An appraisal of the traditional fish handling and processing methods in Lake Chad (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23218 | 19325 | 2018-03-18 13:40:29 | 23218 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-13
    Description: The paper reviews the various techniques of fish handling and processing in Lake Chad. Poor handling of fish catches on board coupled with the distant location of the fishing grounds and thick aquatic vegetation on the lake which hamper fast movement of catches to the processing centers are the bane of good quality fresh fish getting to the processors. The techniques adopted in processing and preservation are mainly smoking, char-burning and sun drying. Defects suffered by the processed products of the methods include high moisture content, heavy insect infestation, bacterial decomposition and fungal attack. Protection of catches from direct sunlight by spreading wet jutes over them will lower the rate of deterioration. Removal of the aquatic vegetation by appropriate authorities and canalization will ease movement of fish catches to the processing centers. More serious enlightenment of the processors on the adoption of the 'Chorkor' oven will reduce the problems presently facing cured fish. The use of rambo insecticide and other dangerous chemicals by the fish processors and marketers for the preservation of fish products before repackaging should be discouraged.
    Description: Includes:- 1 table.;43 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Fish handling ; Handling ; Processing fishery products ; Curing
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  • 17
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    The impact of meteorological parameters on fish weight loss in the Kainji Solar Tent Dryer (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23285 | 19325 | 2018-03-28 16:10:49 | 23285 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-13
    Description: Metrological parameters and their impacts on weight loss of fish inside Kainji Solar Tent Dryer were experimentally investigated. Drying experiments were conducted in solar dryer across the five agro ecological zones of Nigeria. During the drying experiments, the parameters such as temperature, relative humidity were lowest. The study showed that meteorological parameters were the primary determinants for fish drying within the Kainji Solar Tent Dryer, since weight loss during the experiment followed the pattern of these parameters
    Description: Includes:- 2 tables.;2 figs.;5 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Processing fishery products ; Drying ; Solar power
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  • 18
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    Improved fish processing and preservation techniques in Lake Chad (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23336 | 19325 | 2018-04-07 17:13:31 | 23336 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Improved fish processing and preservation techniques in Lake Chad were carried out at Federal College of Freshwater Fisheries Technology, Baga, Borno State, Nigeria. Experiments were carried out using either Kainji Gas Smoking Kiln, Watanabe Kiln, Salting and Solar Drying. The improved (Modern) methods of preservation are faster, more durable, ensure a greater varieties of fish products, render bacteria actions ineffective and above all, products are more appetizing than the traditional preservative techniques but the latter are cheaper and easier to design with local materials.
    Description: Includes:- 3 table.;4 refs.
    Keywords: Fisheries ; Nigeria ; Chad L. ; freshwater environment ; Processing fishery products ; Curing ; Drying ; Processed fishery products
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  • 19
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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
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    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
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  • 20
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    Development of a model rotatory fish smoking kiln using agro-wastes as source of fuel (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23359 | 19325 | 2018-04-08 12:13:35 | 23359 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: A model fish smoking kiln was designed and fabricated to use agro-wastes (sawdust, palm kernel shell and rice bran) as alternative to conventionally used charcoal (control) as fuel energy source for smoking fish. Clarias gariepinus was washed, brined and smoked in chunks or whole in the kiln. The smoking kiln has an estimated capacity of 40kg of fish/batch with six fish trays and 36 fish hooks. Heat transfer is by conduction and convection. The rotatory wheel and axle on which the fish drying trays were anchored ensured even distribution of heat. The kiln has 69.4% energy efficiency and drying period of 10 hours at an average temperature range of 60 - 120degreesC, depending on the type of agro-waste used as source of fuel energy. The fuel conversion ratio, drying rates and calorific values of the different agro-waste products were also determined. Calorific value of the four agro-wastes ranged between 16.2MJ/Kg in palm kernel to 30MJ/Kg in charcoal. The drying rates of sawdust and rice bran compare favourably with charcoal and they produced smoked fish similar in dryness and quality with fish smoked with charcoal. Palm kernel had the least drying rate of smoked fish (weight/hour) during the 10-hour smoking duration.
    Description: Includes:- 3tables.;2 figs.;9refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Curing ; Processing fishery products ; Cured products
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  • 21
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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
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    Nutritive evaluation of enclosed salted-solar dried Oreochromis niloticus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23385 | 19325 | 2018-04-10 16:50:15 | 23385 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study investigated the effect of enclosed solar drying on the nutritive quality of unsalted and salted Oreochromis niloticus. Sensory and proximate evaluations were carried out on the salted and unsalted fish after drying. Acceptability, appearance, colour, odour, taste and texture of salted and unsalted fish differed significantly (P〈 O.05). The moisture, protein lipid and ash contents differed significantly (P〈 O.05. All dried fish samples from the enclosed dryers showed high levels of acceptability and protein content. However, fish samples brined at 25% and dried using Solar Tent Dryer had the highest acceptability and protein content.
    Description: Includes:- 1 table.;1 fig.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Processing fishery products ; Drying ; Nutritive value
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    Comparative analysis of physicochemical characteristics of ABU and Zaria Dam (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23440 | 19325 | 2018-05-02 08:25:12 | 23440 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physical and chemical parameters of ABU Dam and Zaria Dam were carried out between September and October 2009. The results obtained in the two water bodies were temperature 27.7 0C, pH (7.5 and 7.3), dissolved oxygen (5.8 mg/l and 5.0 mg/l), biochemical oxygen demand (1.74 mg/l and 2. 16 mg/l), alkalinity (58 mg CaC03/l and 49 mgCaCO3/l) P04-P (2.47 mg/l and 1.59 mg/l) NO3-N (3.67 mg/l and 3.47 mg/l), conductivity (54.70 ~ks-1 and 42.48 ~ks-1), total hydrocarbon (TH) (47.66 mg/l) and 48.00 mg/l) and total dissolved solids (32.68 mg/l and 25.35 mg/l) respectively. There was no significant difference in the mean values of the parameters (P〉0.05) except conductivity and total dissolved solids. The water bodies were found to be neutral with high conductivity. All the properties in the water bodies were in conformity with international standards both for drinking and aquatic life.
    Description: Includes:- 2 tables.;7 refs.
    Keywords: Chemistry ; Limnology ; Pollution ; Nigeria ; Zaria Dam ; Nigeria ; ABU Dam ; freshwater environment ; Physicochemical properties ; Pollution
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    Relationship among Tilapia guineensis fingerlings abundance and water quality variations in a brackish water reservoir in Lagos (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23442 | 19325 | 2018-05-02 08:28:15 | 23442 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In recent times there has been an upsurge in the culture of Tilapia in Nigeria resulting in increased demand for the fingerlings which is hardly satisfied. This is due to increasing demand for table size tilapia as food fish and under-sized tilapia in the fish meal and fish canning industries in Nigeria. Collection of Tilapia guineensis fingerlings from the wild, to augment hatchery production, has been the practice and this is subject to environmental fluctuations. Multivariate regression and correlation analyses of accumulated data were used to investigate the effects of changes in water quality parameters on abundance of fingerlings of Tilapia guineensis in a brackishwater habitat in Lagos. Dissolved oxygen (DO), salinity and secchi transparency were found to be the most dominant factors affecting the abundance of Tilapia guineensis fingerlings in the Lagos lagoon. Peak period of abundance was closely associated with period of low salinity (0.50%o to 5.60%o), which coincided with the period of low transparency and low DO in the rainy season. The correlation analyses of Tilapia guineensis fingerlings with the water quality parameters yielded the following correlation coefficients (r)- 0.598; (salinity); -0.644 (transparency); -0.710 (DO); -0.566; (temperature) and 0.129 (pH). The abundance of Tilapia guineensis fingerlings in the Lagoon was ultimately defined by a suitable regression equation. This result is expected to optimize the collection of fingerlings of Tilapia guineensis from the wild and boost food fish security in Nigeria and elsewhere.
    Description: Includes:- 1 table.;1 fig.;( refs.
    Keywords: Chemistry ; Fisheries ; Tilapia guineensis ; Nigeria ; Port Harcourt ; brackishwater environment ; Water quality ; Fingerlings ; Chemical properties ; Physicochemical properties
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    Spatial and temporal variations of physicochemical variables in a small 'pristine' stream in Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23445 | 19325 | 2018-05-02 08:32:33 | 23445 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Spatial and temporal variations of physico-chemical variables of Onu-Iyi ?Ukwu stream were studied for 12 months from March 2005 to February 2006. Three sampling stations were established along the main stream channel from source to mouth. Spatial variation in physico-chemical parameters indicated that total alkalinity, total hardness, conductivity, and nitrate-nitrogen (NO3) recorded their highest values at the upper reaches (with values 14.0mg/l, 88.09mg/l, 17.00~kscmiscm, and 0.60mg/l respectively). Dissolved Oxygen (DO) and pH had their maximum values of 8.20mg/l and 6.94 at the middle reaches. Turbidity, biochemical oxygen demand (BOD), temperature and phosphate-phosphorus (PO4) increased steadily from source to mouth. The observed seasonal variation indicated that wet season values were higher for all the parameters except temperature, turbidity, phosphate-phosphorus (PO4) and total alkalinity although the values were not statistically significant at p〉0.05. The correlation coefficient (r) showed no significant relationships p〈0.05 between physico-chemical parameters except DO and BOD with correlation values of (0.75 and -0.54) respectively.
    Description: includes:- 2 tables.;1 fig.;17 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Onu-Iyi-Uku Stream ; freshwater environment ; Physicochemical properties ; Phosphates ; Phosphorus ; Turbidity
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    Limnological studies of Bosso dam and it's tributaries in Minna, Niger State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23449 | 19325 | 2018-05-02 08:39:20 | 23449 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physico-chemical parameters of Bosso Dam were analyzed weekly for a period of six (6) weeks from 29th October, 2009. In all, six (6) stations were identified within the dam. The physico-chemical parameters assessed were: temperature, dissolved oxygen, pH, alkalinity, hardness, conductivity and transparency. The results obtained from the analysis revealed slight variations in most parameters. There was no significant difference p〉0.05 in pH regardless of stations and weeks. But significant difference p〉0.05 were observed in dissolved oxygen, nitrate, temperature, conductivity, hardness, alkalinity, biological oxygen demand, transparency, in respect regard to stations. These variations could be due to influx of organic waste from surface run offs and inorganic waste deposited by man. The physico-chemical parameters observed, indicated that most of them fall with the recommended range or standard by the Federal Ministry of Environment
    Description: Includes:- 2 tables.;10 figs.;18 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Bosso dam ; freshwater environment ; Physicochemical properties ; Chemical properties ; Physical properties ; Water properties
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    Effect of smoking duration on the microbiological quality of cold-smoked Atlantic cod, Gadus morhua (Linnaeus, 1758) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23491 | 19325 | 2018-05-06 13:02:08 | 23491 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study evaluated the effect of varying smoking durations of 6, 6.5, 7 and 7.5 hours on the microbiological quality and percentage moisture content of cold-smoked Atlantic Cod, Gadus morhua. The fish sample were cold-smoked using the traditional drum oven. Four batches of the smoked fish were stored in metal baskets at ambient temperatures for a period of 12 days and assessed for Staphylococcus aureus and Escherichia coli loads, Mould count, Total Plate Count and Total Coliform Count. Analyses of the smoked fish samples were carried out at the initial stage (day 0) and subsequently every alternate days (i.e. days 2, 4, 6, 8, 10 and 12). Significant variations (P 〈 0.05) were obtained for all the microbial counts on the four smoked fish samples. The best microbiologically stable cold-smoked samples were that smoked at the longest duration of 7.5 hours. This produced the least mean microbial load range of TPC (1.50 x 103 - 2.00 x 105cfu/g); TCC varied from 0.0MPN/g to 12.0 MPN/g ; Mould count (1.32 x103 - 2.55 x 105 cfu/g) and Staphylococcus aureus (3.0 x103 - 1.35 x 105cfu/g) while percentage moisture content ranged between 25.3% to 15.2%. All the samples tested negative to Escherichia coli.
    Description: Includes:- 2 tables.;15 refs.
    Keywords: Fisheries ; Gadus morhua ; Nigeria ; Ogun State ; marine environment ; Microbial contamination ; Curing ; Processing fishery products
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    Gender and fisheries of Lake Kainji, Nigeria: a review (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23515 | 19325 | 2018-05-08 15:42:14 | 23515 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper examined gender and fisheries of Lake Kainji, Nigeria. The study highlights socio economic characteristics of women involved in Kainji Lake fisheries, important issues about gender and fisheries. It reveals that the categories of women in the Kainji Lake fisheries are in the middle age of 31 to 40 years with very low educational background. It also indicates that fish processing has been the most prominent activity of women in fisheries of Lake Kainji and constitute about 60 percent of the women. The study concludes that women play significant roles in all aspects of fisheries in Lake Kainji. Importantly, women’s roles span reproduction and production.
    Description: Includes:- 1 table;! fig.;13 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Women ; Fisheries ; Processing fishery products
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    Evaluation of slurry formulations for processing of kilishi of bony tongue (Heterotis niloticus, Cuvier) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24178 | 19325 | 2018-05-13 19:03:41 | 24178 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The kilishi of Heterotis niloticus was produced for determination of appropriate slurry formulations for fish kilishi preparation. Thirty six freshly caught samples of H. niloticus with average weight of 306.20 ~c 18.33g, kilishi of this species was prepared with three different slurry formulations of high (F1), medium (F2) and low (F3) proportions of groundnut dough to spice mixture in the ratio of 1.3: 1.0, 1.0: 1.2 and 1.0: 1.8, respectively. Results of proximate composition indicated that kilishi of the H. niloticus prepared with formulation 3 (F3) recorded significantly higher (p〈0.05) protein content (54.22 ~c 0.01 %) and lower lipid content (8.00 ~c 0.00%), despite recording significantly higher (p〈0.05) moisture content (9.93 ~c 0.07%). Sensory score of kilishi of H. niloticus processed with F3 formulation rated significantly higher (p〈0.05) for taste, flavour and general acceptability with mean scores of 5.94 ~c 0.21,5.77 ~c 0.20 and 5.50 ~c 0.22, respectively. It could be concluded that kilishi of H. niloticus prepared with F3 formulation was the most acceptable hence, recommended for use in kilishi production.
    Description: Includes: 4 tables.;Also includes: 20 references.
    Keywords: Fisheries ; Heterotis niloticus ; Nigeria ; Sokoto ; Kilishi ; Heterotis niloticus ; Spices ; Proximate analysis ; Organoleptic assessment ; freshwater environment ; Freshwater fish ; Fishery products ; Processing fishery products ; Drying ; Packing fishery products ; Organoleptic properties ; Water content ; Enzymes ; Microorganisms
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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
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    Assessment of water quality in Kigera Fish Farm, New Bussa (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23017 | 19325 | 2018-03-05 09:26:57 | 23017 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The physico-chemical and biological characteristics and nutrient concentration of Kigera Fish Farm ponds were monitored for two months to assess the water quality. The parameters measured were dissolved oxygen, temperature, hydrogen ion concentration, Secchi-disc transparency and zooplankton composition. Some fish species were identified in the course of study. Temperature ranged from 26 -30degreesC; dissolved oxygen ranged from 3mg/l-6.6mg/l, pH ranged 7.0 -7.2; while Secchi-disc transparency ranged from 0.19 - 0.25m. The three ponds were quite similar in these parameters. All the parameters that were investigated in this study are within the tolerable level for warm water fishes. Five different zooplankton species were identified at the Kigera Fish Farm, and were grouped according to their major categories namely: Copepods, Cyclopoids and Copepodite), Cladoceran (〈i〉Moina〈/i〉), and Rotifera (〈i〉Asplanchina〈/i〉). 〈i〉Branchionus〈/i〉 species in the Rotifers group dominated the zooplankton species in all the three ponds.
    Description: includes:- 5 tables.;7 refs.
    Keywords: Aquaculture ; Chemistry ; Nigeria ; Kigaria Dam ; freshwater environment ; Water quality ; Physicochemical properties ; Zooplankton
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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
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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
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    Assessment of smoked fish packaging in Doron-Baga metropolis, Borno State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24074 | 19325 | 2018-05-12 13:59:45 | 24074 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study examined how smoked fish are being packaged in Doran-Baga metropolis. A random sampling technique was used purposely to select one hundred and fifty respondents who are currently involve in smoked fish packaging. Data were collected by means of structured questionnaire. Data collected were analyzed using percentages and frequency. Results revealed that smoked fish packaging is predominantly traditional in the study area. Modern method of smoked fish packaging is nearly absent when compared to smoked fisheries resources produced and packaged from the area
    Description: Includes: 3 tables;Also includes: 8 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Borno ; Chad L. ; freshwater environment ; Cured products ; Packing fishery products ; Evaluation ; Processing fishery products ; Packing materials
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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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    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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    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
    Repository Name: AquaDocs
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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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    Effect of spice treatment on the quality of hot-smoked catfish (Clarias gariepinus) (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23056 | 19325 | 2018-03-05 20:47:04 | 23056 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: An experiment was conducted to determine the efficacy of pepper and garlic spice mixture at 0%, 2%, 3%, 4% and 5% levels (per gram of fish) in retarding lipid oxidation and on the organoleptic quality of hot-smoked catfish (Clarias gariepinus) in Kainji Area. The fish samples were frozen, cut, eviscerated, cleaned and dipped in 14.5% brine for 10 minutes. They were treated with the spices, smoked at 80-86~'C for 6 hours, cooled, stored at room temperature (25~'C-31~'C) for 21 days and used for physical, chemical, microbial and sensory evaluation studies. Untreated samples served as control. From the results of analysis, samples treated with the mixture of pepper and garlic paste (1:1 ratio) were microbially more stable than the control samples as these had longer shelf-life and were not visibly covered by moulds during a 21-day storage period. The preservative activity of brine and the anti-oxidant activity of pepper and garlic mixture were evident from lower Thiobarbituric acid (TBA) and peroxide values of treated samples relative to untreated samples. Results of sensory evaluation showed a general preference for spice-treated samples.
    Description: Includes:- 7 taables.;15 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Fishery products ; Processing fishery products ; Cured products
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    Use of screened fish retail table to improve the hygiene of fish sold in local markets (2021)
    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23301 | 19325 | 2018-03-30 15:07:39 | 23301 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Screened retail table was designed to improve the hygiene of fish sold in our local markets. Investigation was carried out on the microbiological population on Tilapia fish. Overall value obtained from plate counts show that fish were more infested outside the table. The sensory values are 4, 13, and 6 for on-sport open table and screened respectively, also microbial load range between 7x10-5 to 88 x 10-5 cfu/g for open table where 3x 10-10 - 33 x 10-10 for screened table. This shows that fresh fish on open retail table in our markets were prone to deterioration.
    Description: Includes:- 3 tables.;1 refs.
    Keywords: Fisheries ; Health ; Nigeria ; Fresh fish marketing ; freshwater environment ; Deterioration ; Fish spoilage ; Quality control ; Processing fishery products ; Marketing ; Hygiene
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    Some aspects of the physico-chemical parameters of Kontagora Dam, Niger State Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23319 | 19325 | 2018-03-30 15:34:16 | 23319 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The seasonal variations in the physicochemical parameters were studied from January, 2007 to December 2007, in Kontagora Reservoir, Niger State, Nigeria. The physico- chemical parameters were determined bi-monthly , using the following methods , temperature using mercury thermometer in degree centigrade, transparency using Secchi-disc , Pye Unicam model 292 meter used for pH and electrical conductivity. Dissolved oxygen by modified Winklerazide method, water hardness and Phosphate- phosphorus by method of Lind (1979), total alkalinity by standard method described by Boyd(l979) , Nitrate- Nitrogen by Phenoldisulphonic acid method. The rainy season mean values for water temperature, depth, pH, Nitrate-Nitrogen, were significantly (P〈0.05) higher than those for the dry season. However, for transparency, conductivity, dissolved oxygen, hardness, alkalinity, phosphate-phosphorus and total dissolved solid, the dry season mean values were higher than the rainy season mean value. As in most other Africa inland water bodies, there was seasonality in the physicochemical parameters variables. The torrential rains of the dam environment, the characteristics trade winds of the dry season, effect of deforestation, fertilizer application, herbicides, insecticide and other chemical factors might have contributed to the fluctuations of some of the physicochemical parameters detennined in the Reservoir.
    Description: Includes:- 2 tables.;1 fig.;39 refs.
    Keywords: Chemistry ; Nigeria ; Kontagora L. ; freshwater environment ; Physicochemical properties ; Seasonal variations
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    Study of the solar dried and traditional sun-dried fish products (2021)
    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23295 | 19325 | 2018-03-30 14:55:07 | 23295 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Drying of freshly caught fish to heat from sunlight is the simplest method of fish preservation in the arid regions of the tropics, where heat energy from sunlight is of considerable intensity, the Kainji Solar Tent Dryer was developed to improve the traditional drying methods Bagrus bajad was used in this study as a result of its dominance in the Jebba and Kainji Lake Basin. The fish were dried in the Kainji Solar Tent Dryer and open sun and dying was completed within 2-4 days. Results from organoleptic study show that dried fish products in the Kainji Solar Tent Dryer were light, whitish-yellow colour, while the sun dried fish was dark orange in colour. Solar dried fish had mean score of 8.2 for appearance while sun dried fish had 5.2, sun dried fish had 6.6 for texture while solar dried fish had 7.8. For odor and taste solar dried fish had mean score of 8.2 and 8.4 while sun dried fish had 4.6 and 0. Moisture content was 10.6 for solar dried fish compared to 22.26 for sun dried fish. Crude protein and fat were 62.3 and 16.25 for sun dried fish compared to 82.14 and 8.46 for solar dried fish. Solar dried fish had 43.3cfu/gm compared to 132 cfu/gm for sun dried fish in the microbiological load assessment. Organoleptic assessment of the final dried product showed that the solar-dried fish were of better fish quality than traditional sun-dried fish.
    Description: Includes:- 3tables.;7 refs.
    Keywords: Fisheries ; Bagrus bajad ; Nigeria ; freshwater environment ; Drying ; Organoleptic properties ; Processing fishery products
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    Prolonging freshness of tilapia Oreochromis niloticus by evaporative cooling system (ECS) (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23310 | 19325 | 2018-03-30 15:20:08 | 23310 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The principle of Evaporative Cooling System (ECS) was adopted to construct a Wooden Evaporative Coolant Structure (WECS) to prolong the freshness of Tilapia, Oreochromis niloticus. The keeping quality of the two structures was compared with fish kept at ambient using temperature, relative humidity, weight loss and organoleptic indices. Results showed that the Basket ESC and Wooden ECS recorded lower temperatures and higher relative humidity values as compared with the ambient. Tilapia stored at ambient condition recorded significantly higher weight loss (P〉0.05) than those kept in BECS and WECS. Results of sensory evaluation showed that there was a gradual reduction in the organoleptic quality of the fish stored in BECS and WECS. Quality of whole fish by panelist after 8 hours of storage showed that the two ECS models recorded significantly higher (P〈0.05) freshness scores than fish stored at ambient temperature. Fishmongers should adopt this technology (BECS and WECS) as a means of prolonging the freshness of Tilapia Oreochromis niloticus before they are sold to consumers.
    Description: Includes:-6 tables.;2 figs.;9 refs.
    Keywords: Fisheries ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Processing fishery products ; Cooling systems ; Cooling ; Fish spoilage ; Quality ; Acceptability
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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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    Comparative study on the efficiency of FUTY smoking kiln and traditional smoking drum (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23347 | 19325 | 2018-04-08 11:41:40 | 23347 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Freshly caught mud catfish (Clarias anguillaris) and Tilapia (Oreochromis niloficus) collected from lake Geriyo in Adamawa state were smoked using different Kilns in order to evaluate the efficiency of the Smoking Kilns. The products from Federal university of Technology, Yola (FUTY) Improved Processor (FIP) were of better quality than the Traditional Smoking Drum (TSD). The use of these two processors revealed the profitability to fisher folks. marketers and fish farmers in the utilization of the FIP compared to the TSD as losses incurred was minimal. The qualities of the smoked Clarias anguillaris and Oreochromis niloticus were determined from their various peroxide values obtained after a 28 days storage period. The physi-cochemical parameters of the smoked samples were obtained. Products from FIP were of better quality than the TSD.
    Description: Includes:- 1 table.;1 fig.;13 refs.
    Keywords: Fisheries ; Nigeria ; Processing Fishery Products Equipment ; freshwater environment ; Processing fishery products ; Processed fishery products ; Equipment
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    Food borne bacterial pathogens in smoke-dried fish in Lagos markets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23395 | 19325 | 2018-04-12 07:17:16 | 23395 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Fifty samples of smoked fish were obtained from some markets in Lagos and these were analyzed for the presence of Staphylococcus aureus, Vibrio sp. and Listeria monocytogenes. All the samples tested positive for Staphylococcus aureus, 27 samples for Vibrio sp. and none for Listeria monocytogenes. This study reveals that the smoked fish sold in Lagos, could be a potential source of food borne bacterial pathogens and thus the need for improvement in processing and handling are required.
    Description: Includes:- 1 table.;17 refs.
    Keywords: Fisheries ; Health ; Nigeria ; Lagos ; freshwater environment ; Bacteria ; Pathogenic bacteria ; Cured products ; Processing fishery products
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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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    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
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    Microflora associated with processing and storage of the white catfish (Chrysichthys nigrodigitatus) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23488 | 19325 | 2018-05-06 12:56:50 | 23488 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Quality deterioration (microbial load) of smoked white catfish (Chrysichthys nigrodigitatus) from Ekeonunwa market Imo state Nigeria, was studied for six weeks. The experimental fish was divided into two batches. One batch of 18 fishes with average weight of 700g was resmoked weekly at 75oC. the second batch of 18 fishes weighing an average of 750g was left unresmoked. Weekly samples of both unresmoked and resmoked fish were taken from different regions (body flanks, gill and gut) and analyzed in the laboratory. Total plate counts (TPC) for the bacterial organisms in both resmoked and unresmoked samples (Table III) ranging between 1.56 105 and TNTC ( too numereous to count) exceeded the range of specified microbiological limits recommended for fish and fishery products by ICMSF (1986). Pathogenic organisms isolated included Escherichia coli, Staphylococcus aureus, Lysteria monocytogenes, Bacillus cereus, Aspergillus flavus, Penicillium varrucossum, Yeast and Mucor. Both unresmoked and resmoked fish specimens were contaminated with these spoilage microbes, but the microbial load of the resmoked samples were less than those of the unresmoked samples. Resmoking beneficially reduces microbial load of stored fish, increases the shelf/storage life, but can not totally eliminate pathogens. The presence of pathogens raises a public health concern.
    Description: Includes:- 3 tables.;1 fig.;10 refs.
    Keywords: Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Imo State ; freshwater environment ; Processing fishery products ; Curing ; Microbial contamination ; Microorganisms ; Infestation ; Fish storage
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    Preliminary study on comparative morphometry of Cynothrissa mento (Regan, 1917) from Ologe, Badagry and Epe Lagoons, Lagos, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23460 | 19325 | 2018-05-05 12:31:34 | 23460 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The morphometric characters of Cynothrissa mento from three major Lagoons (Ologe, Badagry and Epe) in Lagos, Nigeria were compared to assess the possibility of this fish species from the three Lagoons belonging to the same sub-population. The length-weight relationships (LWR), and condition factors (CF) of the fish were also described as well as the physico-chemical parameters of the three water bodies. The study was conducted between May, 2009 and April, 2010 and monthly sampling of fish and water was done in each sampling site. Seven7 physico-chemical parameters were assessed and these are; temperature, pH, salinity, turbidity, dissolved oxygen, total alkalinity and total hardness. A total of 294 specimens (Ologe 60, Badagry 174 and Epe 60) of C. mento were collected from the landings of the local fisher folks from the sampling sites. Seven morphometric characters; total length (TL), standard length (SL), body depth (BD), head length (HL), head depth (HD), eye diameter (ED) and interorbital width (IW) were measured. There was no significant difference (p 〉 0.05) in all the physico-chemical parameters measured among the sampling sites except pH. Coefficient of difference revealed that the C. mento from the three lagoons are uniform in all the morphometric parameters examined, which means that the specimens from the three sampling sites do not belong to different sub-populations. The growth coefficient/slope (b) values obtained for the fish species from the sampling sites ranged from 2.27 - 2.53, and differed significantly (p 〈 0.05) from 3, which indicates that most of the fish species have negative algometric growth.
    Description: Includes:- 4 tables.;1 fig.;24 refs.
    Keywords: Ecology ; Chemistry ; Cynothrissa mento ; Nigeria ; Ologe Lagoon ; Nigeria ; Badagry Lagoon ; Nigeria Epe Lagoon ; marine environment ; Population dynamics ; Morphometry ; Check lists ; Length-weight relationships ; Condition factor ; Physicochemical properties
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    Chemical and biological assessment of Chrysichthys furcatus from River Niger at Cable-point, Asaba (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23489 | 19325 | 2018-05-06 12:58:47 | 23489 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Bacteria flora predominates the skin of freshly caught fish, and will invade the tissue of the fish immediately after catch. Two preservative methods (cold smoking and freezing) were used to store eighteen specimens of Chrysichthys furcatus harvested from River Niger at Cable-point, Asaba. Two specimens were randomly selected every day from the cold smoked specimens and on weekly basis from the frozen specimens for physical, chemical and biological examination for bacteria causing spoilage. Five bacteria isolates: Salmonella spp, Vibrio cholera, Escherichia coli, Staphylococcus aureus and Proteus vulgaris, were identified. Physical observation of the cold smoked fish after 24 hours showed the production of gas, off-odor, off flavour and slime formation. The colony forming units (CFU) of bacteria isolated from the fish immediately after harvest was 116 x 109 cfu/g. It increased to 268 x 109 cfu/g after 4 days of preservation, and to 64 x 109 cfu/g after four weeks of preservation. The Chi square (X2) analysis revealed that there was a significant difference between the bacteria load of frozen and cold smoked specimens. Free fatty acid value immediately after harvest was 0.90 %. It increased to 2.24 % after four weeks in the freezer and 2.35 % after four days of cold smoked storage. The Total Volatile Nitrogen profile at harvest time was 15.3 mgN/100g. It increased to 35.2 mgN/100g after four days, (for the cold smoked specimens) and 26.3 mgN/100g (for the frozen specimens) after four weeks. The peroxide and hydrogen ion concentrations followed the same increasing trend. The study revealed that freezer preservation was better than the cold smoked one. This is because bacteria proliferation was reduced and or halted in the frozen specimens, whereas it encouraged rapid bacteria growth in the cold smoked fish. The production of total volatile nitrogen (TVN), free fatty acid (FFA), peroxide value (PV) and hydrogen ion concentration (pH) was higher in the cold smoked specimens than in frozen ones, hence the cold smoked specimen exhibited shorter shelf life than their frozen specimens.
    Description: Includes:- 4 tables.;15 refs.
    Keywords: Fisheries ; Chrysichthys furcatus ; Nigeria ; Niger R. ; freshwater environment ; Infestation ; Fish storage ; Microbial contamination ; Chemical degradation ; Chemical reactions ; Biological damage ; Damage ; Processing fishery products
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    Proximate composition of Pseudotolithus elongatus subjected to different processing techniques (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23497 | 19325 | 2018-05-07 12:17:33 | 23497 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The changes that occur on proximate composition of some common fish processing methods used in Nigeria were studied in order to determine the nutritional content of the processed products. Traditional (smoke drying and sun drying) and modern (electrical oven drying) methods of processing were used to process Pseudotholithus elongatus and the results were compared with the fresh sample to determine the changes that occur during processing. The results for the fresh sample of P. elongatus were 79.50%, 1.50%, 0.8% and 18.2% for moisture, ash, lipid and protein. For the processed products, the moisture content for smoke-dried, sun-dried, salt sun-dried and oven-dried fish were 27.00%, 21.83%, 19.50% and 20.17% . Oven dried had the highest protein content (69.87%) while salt sun-dried had the lowest (54.90%). Lipid content was highest in sun-dried (6.6%) and lowest in smoke-dried (4.6%). Correlation between smoke-dried and sun-dried were r2 = 0.99, smoke-dried and oven-dried were r2= 0.98 and smoke-dried and salt sun-dried were r2= 0.98. There was no correlation between the fresh and the processed P.elongatus. The present findings revealed that processing affect the nutritional composition of fish.
    Description: Includes:- 1 table.;22 refs.
    Keywords: Fisheries ; Health ; Pseudotolithus elongatus ; Nigeria Lagos ; Proximate composition ; freshwater environment ; Processing fishery products ; Moisture ; Proteins ; Chemical analysis ; Lipids
    Repository Name: AquaDocs
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    Preliminary study on the antioxidative and antimicrobial effects of fresh garlic (Allium sativum) on the shelf life of hot smoked catfish (Clarias gariepinus) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23495 | 19325 | 2018-05-07 12:13:48 | 23495 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effects of fresh garlic (Allium sativum) at concentrations of 0 g/kg (control), 10 g/kg, 30 g/kg and 50 g/kg of fish on lipid oxidation and microbial growth of hot smoked catfish Clarias gariepinus during a 28 day storage period at ambient temperature of 20-260C was examined. The samples were subjected to chemical and microbial analyses during the storage period. The results of analyses suggest that fresh garlic possesses antioxidant and antimicrobial properties, which can extend the shelf life of Clarias gariepinus.
    Description: Includes:- 1 table.;2 figs.;6 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Garlic ; freshwater environment ; Chemical analysis ; Chemical composition ; Microbiological analysis ; Processing fishery products ; Preservatives ; Fish storage ; Storage conditions ; Storage effects ; Storage life ; Shellfish
    Repository Name: AquaDocs
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    Comparative studies of groundnut oil and sodium chloride as protectants against insect infestation of smoked dried fish in Kainji Lake areas (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23490 | 19325 | 2018-05-06 13:00:41 | 23490 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effects of groundnut oil and sodium chloride as protectants against insect infestation of dried fish were investigated for a period of 13 weeks. The fish samples were divided into 3 groups, a group was soaked for 10mins in 30% sodium chloride solution (Brine), and the second group was dipped in groundnut oil after smoking while the third group served as control. The samples were kept in different containers in the laboratory at temperature of 28oC and 70% Relative humidity for 13 weeks. Results show that, the fish treated with 30% sodium chloride was effectively protected from insect and moulds compared to sample treated with groundnut oil. The odour and the texture were also more attractive to customers. However, fish treated with groundnut oil was attacked by insects at week 12th and 13th with 6 Maculatus, 4 Necrobia rufipes species and at few mould colonies. The control specimens however was attacked by insects from week 8th to 13th with numerous number of both Necrobia rufipes and Maculatus species as well as mould colonies showing as early as from the 6th week. The results proved that sodium chloride is more effective than groundnut oil for long period of storage.
    Description: Includes:- 5 tables.;5 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; Groundnut oil ; freshwater environment ; Infestation ; Processing fishery products ; Fish storage ; Sodium chloride
    Repository Name: AquaDocs
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    Format: 455-458
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    Role of women in fisheries and fish processing: a global view (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23522 | 19325 | 2018-05-09 12:25:25 | 23522 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Women are the majority of the third World population. They are considered subservient to their male counterpart, even in Europe and America where women have greater basic human right. This paper evaluates the various roles of women in Fisheries and fish processing. Statistics from the European Union shows that, of the various fishing sectors, participation of women (in terms of number) was greatest in fish processing, followed by marine aquaculture, marine fishing and inland aquaculture, with no women involved in inland fishing. In Asia and Africa women are basically involved in fish processing and marketing. In Asia (Thailand and Philippines), women are involved in hatchery operations in aquaculture in addition to fish processing. The finding of the review shows that Fish processing in developing countries, principally Africa is not attracting young literate generation who may have better management competence. It further revealed that, in Nigeria women are directly involved in capture fishery, in addition to fish marketing and processing. This is aimed at empowering women economically to meet the pressing needs of the family. The paper further assesses the problems of women in fisheries and fish processing namely, access to financial resources, education, support services and the need to ensure food security. Possible ways of improving women’s participation in fisheries were highlighted.
    Description: Includes:-1 table.;23 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Women ; Processing fishery products
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 640-648
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    Effects of NIOMR smoking kiln and oven on the crude protein, minerals and vitamins of catfish Clarias gariepinus (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24197 | 19325 | 2018-05-16 15:16:21 | 24197 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of two different preservative methods, NIOMR Smoking Kiln and Oven drying on Crude Protein minerals and Vitamin of clarias gariepinus were studied. Clarias gariepinus were obtained from the fish farm of African Regional Aquaculture Centre, Aluu, Port Harcourt. The crude protein, minerals and vitamins of the fresh fish were determined immediately while two other batches were separately dried using oven at 50~'C for 30minutes and NIOMR Smoking Kiln at 70~'C for 3 hours. Result of the crude protien of fresh fish was 21.84 ~c 1.10 which increased to 59.53 ~c 1.88 and 35.41 ~c 1.00 in both NIOMR smoking and oven, respectively. This means that, there was a significant different in both dryers on the crude protein. This will improve the knowledge and capacity of rural women and agricultural communities on the appropriate processing method for fish. The mineral and vitamins of oven dried and NIOMR Smoking kiln were analyzed. The vitamin content of both the fish, dried and smoking kiln shows no significant different except in vitamin A which was significant (p〈0.05).There was significant different (p〈0.05) in the mineral content of the two different drying method except in sodium, Potassium and Phosphorus of the drying method. This result indicates that the two drying methods have effects on the nutritional quality of catfish.
    Description: Includes: 2 tables and 1 figure.;Also includes: 7 references.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Port Harcourt ; Smoking ; Production ; Preservative research ; Quality ; freshwater environment ; Processing fishery products ; Freshwater fish ; Proteins ; Vitamins ; Minerals ; Cured products ; Quality assurance ; Aquaculture equipment ; Nutritive value ; Drying ; Methodology ; Comparative studies
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    Format: 184-187
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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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    Solar drying: an alternative to fish drying - a review (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24198 | 19325 | 2018-05-16 15:18:03 | 24198 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Energy is one of the main concerns for the future development of any nation. It is by far the largest merchandise in the world and an enormous amount of it is extracted, distributed, converted and consumed in our global society daily .One major problem regarding agricultural produce is related to the product storage in the harvesting season, and identifying an alternative to marketing fresh produce. A useful option is to prevent wastage of produce by drying, using solar energy. In this regard, solar dryer for domestic as welI as industrial usage could be an effective alternative of saving conventional energy. Utilization of solar thermal energy through solar dryer is relatively in a nascent state in our country. This paper gives a description of the efforts made under several researches to design and develop some types of solar dryers.
    Description: Includes: 23 references.
    Keywords: Fisheries ; Environment ; Nigeria ; Makurdi ; Solar drying ; Dryres ; Drying methods ; Drying system ; Solar dryer ; freshwater environment ; Drying ; Fishery products ; Energy ; Processing fishery products ; Utilization ; Storage ; Aquaculture equipment ; Conservation
    Repository Name: AquaDocs
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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
    Repository Name: AquaDocs
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    Format: 295-297
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    Changes in the proximate composition of smoked and sundried Atya gabonensis (Irvine) from Lower River Benue, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23059 | 19325 | 2018-03-06 15:38:43 | 23059 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The proximate composition of the fresh water shrimp Atya gabonensis (Irvine), preserved by smoking, salting and sun - drying was determined and compared to the fresh shrimp. All the preservation methods significantly (p〈 0.05) increased the total dry matter (38.34 93%), protein content (17.31 48.9) and ash content (28.36 36.17%) over the fresh shrimp value. Moisture and lipid contents however, were reduced from the fresh shrimp's 61.66% and 25.29% to low value of 7.00% and 5.10% respectively. The preserved shrimp is, therefore, nutritionally superior to the fresh shrimp as preservation enhances its proximate composition. Of all the preservation methods used in this work, smoking is the best. It recorded the best preservation indices of lowest moisture content, higher dry matter, higher protein content and highest ash content.
    Description: Includes:- 1 table.;13 refs.
    Keywords: Fisheries ; Chemistry ; Atya gabonensis ; Nigeria ; Benue R. ; freshwater environment ; Lipids ; Organic compounds ; Proteins ; Ash content ; Cured products ; Fish ; Shrimp fisheries
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 378 -381
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    Awareness on the use of solar tent dryer among the fish processors of Kukawa Local Government, Borno State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24194 | 19325 | 2018-05-16 15:09:49 | 24194 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was carried out in order to assess the use of solar tent dryer in some selected fishing settlement (Yobe, Daban Masara, Tumbun Beriberi and fish Dam) in Kukawa Local Government. Secondary and Primary data were used in this research. Secondary data were obtained from various literatues while primary data were obtained through the use of structured questionnaires. A total number of 60 respondents were randomly selected and interviewed: Fifteen from each settlement (fish processors). Simple percentages were used in analyzing the data. Findings revealed that, majority of the respondents (fish processors) 80% were not aware of the existence of solar tent dryer that can be used for drying fish, only 20% were aware of solar tent dryer.Among these respondents who are aware of solar tent dryer, only 3.33% have used it. The general perceptions of the respondents believe that they will use it if they are provided with the solar tent dryer. The level of awareness on the use of solar tent dryer for fish processing is very low, there is need for intensive awareness creation, through fishery extension workers.
    Description: Includes: 5 tables.;Also includes: 6 references.
    Keywords: Fisheries ; Nigeria ; Kukawa ; Solar Tent Dryer ; freshwater environment ; Fishery products ; Processing fishery products ; Drying ; Cured products ; Aquaculture equipment ; Artisanal fishing ; Solar power
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
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    Format: 174-176
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