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  • 1
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 459-464
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  • 2
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 590-595
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  • 3
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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
    Repository Name: AquaDocs
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    Format: application/pdf
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    Format: 110-114
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  • 4
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 442-448
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  • 5
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 447-454
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  • 6
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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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    Format: application/pdf
    Format: application/pdf
    Format: 489-493
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  • 7
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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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    Format: 480-493
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  • 8
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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
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 455-458
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  • 9
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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
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 640-648
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  • 10
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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
    Repository Name: AquaDocs
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    Format: application/pdf
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    Format: 184-187
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  • 11
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
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    Format: 155-157
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  • 12
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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
    Type: conference_item , TRUE
    Format: application/pdf
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    Format: 188-191
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  • 13
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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
    Format: application/pdf
    Format: 174-176
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