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  • 1
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    Morphometric features and proximate body composition of rocky freshwater prawn (Caridina africana, Kingsley 1882) at Erin-Ijesa waterfalls, Osun State Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24209 | 19325 | 2018-05-19 06:41:34 | 24209 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: An investigation was conducted on the morphometric features and proximate body composition of rocky freshwater prawn, Caridina africana occurring at Erin-Ijesa Waterfalls in Osun State, Nigeria. The adult prawns were collected at the first layer of the Waterfalls using scoop nets and locally fabricated sieves because of the shallow nature of the water body and tiny size of the species. Morphometric features were measured using measuring board and Vernier calipers while the proximate analysis was determined by atomic absorption spectrophotometry in the laboratory. The morphometric variables placed the species correctly into the Infra order Caridea and family Atyidae because the first and second chelipeds were shorter than the remaining three pairs of walking legs. Male prawns were significantly bigger (p〈0.05). than the females as revealed in the morphometric features. The proximate analysis showed that C. africana is composed of 58.79% protein, 5.42% lipid, 11.56% carbohydrate, 14.7% ash and 0.21 % crude fibre. The micro-nutrient composition included iron, zinc, copper, nickel and cadmium. The values for these nutrients make the study to suggest that C. africana could be a nutritive food bio-material for humans and other livestock nutrition especially the fin-fish aquaculture programme.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Biology ; Fisheries ; Caridina africana ; Nigeria ; Erin-Ijesa waterfalls ; Morphometrics ; caridina africana ; Proximate composition ; Micrinutrient ; Erin-Ijesa waterfalls ; freshwater environment ; Morphometry ; Biochemical analysis ; Shrimp fisheries ; Body conditions ; Nutritional requirements ; Nutritive value ; Lake fisheries ; Artisanal fishing ; Males ; Females
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 228-230
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  • 2
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    Heavy metals concentrations in Chrysichthys nigrodigitatus in Arakanga Reservoir, Abeokuta, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24218 | 19325 | 2018-05-19 06:58:26 | 24218 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigates the morphometric and meristic features of Chrysichthys nigrodigitatus in relations to heavy metal concentrations. Varying sizes of Clarias nigrodigitatus were obtained with the help of fisher-folks, from Arakanga reservoir Ogun state, Nigeria. Water samples were also collected alongside with fish samples per week and five of the samples were sent to laboratory for analysis to determine the presence of four heavy metals in both fish and water. Lead, Cadmium, Nickel and Arsenic were investigated by atomic absorption spectrophotometer (AAS). Four tissues; gills, kidney, liver and muscle were compared with the level of metals in the water. Lower concentrations of metals were recorded in water except for Cadmium which is higher, than in fish. Lower concentration of heavy metals found in fish and water was less than that recommended by the World Health Organisation (WHO's) guideline for maximum concentration recorded in the tissue of the samples. Lead was found to be dominant in the gills of C. nigrodigitatus, while Cadmium was found to be highest in the water sample from Arakanga reservoir. There is significant difference (P〈0.05) in Nickel and Arsenic concentration in the tissues of C. nigrodigitatus and water. It was concluded that though the heavy metals of interest were present in measurable quantities, they were still within safe limits for consumption.
    Description: Includes: 11 references.
    Keywords: Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Ogun State ; Arankanga reservoir ; freshwater environment ; Heavy metals ; Freshwater fish ; Reservoir fisheries ; Artisanal fishing ; Lead ; Toxicants ; Pollution effects ; Quality assurance ; Morphometry ; Meristic counts ; Water analysis ; Freshwater pollution ; Nickel ; Arsenic ; Cadmium ; Fish consumption ; Health and safety
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 265-268
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  • 3
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    The effects of heavy metals concentration in some commercial fish in Ogun River, Opeji, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24219 | 19325 | 2018-05-19 07:00:18 | 24219 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on commercially important fish species of heavy metals in water bodies, The primary objectives were to find out the amount of heavy metals concentration in the fish species, sediments and water samples at the deep and shallow part of the river, to determine the toxicity and relationship between the collected samples and the rate at which it pollutes the water. Atomic Absorption Spectrophotometer (AAS) evaluate their wholesomeness for human consumption. Four heavy metals (Lead, Cadmium, Copper and Zinc) were analysed and only Copper and Zinc were found to be present in the digested samples. The concentration of Copper in the fish (flesh) is 0.09mg/l and that of Zinc is 0.25mg/l. In the bone samples, Copper was found to have 0.17mg/l and Zinc to be 0.22mg/l. In the water samples analyzed, the concentration of Copper is 0.035mg/1 while that of Zinc is 0.047mg/l. In the sediment sample, the amount of Copper is 310.0mg/kg while that of Zinc is 20.50.0mg/kg. This however signifies that the fish species in the Ogun River as well as the water is suitable for consumption which was found to be less than the World Health Organization (WHO's) maximum recommended acceptable limits in the food.
    Description: Includes: 7 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Ogun R. ; freshwater environment ; Heavy metals ; Pollution effects ; Freshwater fish ; Fisheries ; Toxicity ; Pollutants ; Quality assurance ; Commercial species ; Sediment pollution ; Water analysis ; Lead ; Cadmium ; Copper ; Zinc ; Freshwater pollution ; Health and safety
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 268-271
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  • 4
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    Gut contents and feeding pattern of Macrobrachium vollenhovenii (Herklots, 1857) and Caridina africana (Kingsley, 1882) at Asejire Lake and Erin-Ijesa waterfalls, South Western Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24207 | 19325 | 2018-05-19 06:38:21 | 24207 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study with intent towards acculturation was carried out on the gut conients and feeding patterns of Macrobrachium vollenhovenii and Caridina africana occurring at Asejire lake and Erin-Ijesa Waterfalls respectively for two years using numerical abundance and frequency of occurrence methods of analysis. There was a strong correlation (p〈0.05) between prawn abundance and food availability, The gut content analysis of M. vollenhovenii revealed that juveniles were predominantly zooplanktivorous, feeding on copepods and rotifers while the adults were omnivorous, utilizing a wider variety of animal foods than plant materials. This changing of diets and patterns as the species advances in age has an implication for its culture potentials. Stomach fullness index was high during the wet season which coincided with high abundance of prawns, C. africana fed mainly on diatoms, zooplankton and other micro-phytoplankton, thus an onmivore with herbivorous tendency. The availability of both species in fresh water bodies and their foods revealed that both species can be cultured in earthen ponds since their unspecialized flexible dietary habit is an optimal strategy for sustained productivity.
    Description: Includes: 3 tables and 1 figure.;Also includes: 12 references.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Macrobrachium vollenhovenii ; Caridina africana ; Nigeria ; Asejire L. ; Nigeria ; Erin-Ijesha waterfalls ; Macrobrachium vollenhovenii ; Caridina fricana ; Gut content ; Accumulation ; Asejire Lake ; Waterfalls ; freshwater environment ; Shrimp fisheries ; Lake fisheries ; Animal nutrition ; Abundance ; Frequency ; Food availability ; Zooplankton ; Stomach content ; Breeding ponds ; Shrimp culture ; Food organisms ; Feeding behaviour
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 219-222
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  • 5
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    Whole rocky fresh water prawns, Caridina africana as replacement for fish meal in diets for African catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24658 | 19325 | 2018-05-27 14:53:28 | 24658 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Specimens of Caridina africana were oven dried at 110~'C for 24 hours and refrigerated at 200~'C prior to proximate analysis. Whole rocky freshwater prawn meal (WRFWPM) was evaluated as a dietary replacement for fish meal in the diet of C. gariepinus fingerlings. The diets were fed to triplicate groups of C. gariepinus fingerlings (10.6 ~c 0.08g) reared in concrete tanks, to assess the effects of its partial or complete replacement with fish meal for 90 days. The diets comprised a control which contained fish meal as a protein source; 0% and four others on weight basis at 25%, 50%, 75% and 100% in which fish meal was progressively substituted with WRFWPM. The crude protein content was 40% and fed at 4% body weight of the fish per day. Results shows that the daily body weight gain, feed conversion ratio, protein efficiency ratio and protein productive values were highest in diet with 50% replacement, closely followed by diet with 25% replacement. All parameters were significantly different for all diets (p〈0.05). Higher dietary inclusion WRFWPM of 75% and 100% led to decrease in growth performance and nutrient utilization of C. gariepinus fingerlings. The cost WRFWPM was significantly lower than that of fish meal. Though the economic viability of C. africana is yet to be evaluated due to its tiny size; its substitution as a fish meal replacer in the diet of C. gariepinus is considered profitable.
    Description: Includes: 25 references
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; C. africana ; C. gariepinus ; Prawn ; Digestibility ; Replacement ; Proximate ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 366-369
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