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  • 1
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    Proximate composition and amino acids profile of smoked catfish Clarias gariepinus and tilapia Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23226 | 19325 | 2018-03-18 14:51:17 | 23226 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The proximate composition and amino acids assay of smoked Clarias gariepinus and Oreochromis niloticus were determined using standard procedures. The mean proximate composition of Oreochromis niloticus are 8.9% moisture, 16.00% lipids, 5.6% ash, 44.5% crude protein, 0.42% crude fiber and 24.9% NFE while Clarias gariepinus has 8.19% moisture, 15.55% lipids, 4.725 ash, 40.46% crude protein, 0.50% crude fiber and 30.58% NFE. There is therefore a nutrient variation between the 2 species of fish Oreochromis niloticus has higher crude protein, lipids, moisture and ash content than Clarias gariepinus.The amino acids profile shows that both fishes have 17 amino acids. Apart from Tryptophan, the following essential amino acids Histidine, Methionine, Threonine, Isoleucine, Leucine, Lysine, Valine and Phenylalanine are present in both fish. Oreochromis niloticus however has higher quantities of the essential amino acids except for Histidine than Clarias gariepinus
    Description: Includes:- 2 tables.;2 figs.;7 refs.
    Keywords: Chemistry ; Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Amino acids ; Ash content ; Lipids ; Organic compounds ; Moisture ; Proteins
    Repository Name: AquaDocs
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    Format: 91 - 95
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  • 2
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    Evaluations off heavy metals in fish from Lake Geriyo Yola, Nigeria using x-ray fluorescence technique (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Description: Includes:- 1table.;11 refs.
    Keywords: Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
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    Format: 69-71
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  • 3
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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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  • 4
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    Effect of imported feed and local feed on growth performance of tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24170 | 19325 | 2018-05-13 18:50:52 | 24170 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A number of 60 Juveniles of Oreochromis niloticus were stocked and divided into two plastic ponds of 0.90m by 0.60 in dimension respectively with initial total weight of 120g.The juveniles were two months and half old as at the time of collection and they were fed with 4mm of the feeds. Each pond contains thirty Oreochomis niloticus which were fed with local feeds, and coppens feed. After weighing the fishes in the two ponds, there was significant difference in the average weight and length, in which the pond that was fed with coppens has the highest average weight and length of 140g and 15.62cm respectively. The quality of the water was checked by measuring pH, dissolved oxygen and temperature of the water using water aquaculture kit. Model: FF-1 A.CAT No. 2430-0. The mortality rate was 0%, while the survivability rate was 100%.
    Description: Includes: 2 tables.;Also includes: 5 references.
    Keywords: Aquaculture ; Ecology ; Oreochromis niloticus ; Nigeria ; Lagos ; freshwater environment ; Feed ; Freshwater fish ; Growth rate ; Length-weight relationships ; Pond culture ; Water quality ; Artificial feeding ; Feeding experiments ; Fish culture ; Survival ; Mortality
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    Format: 78-79
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  • 5
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    The use of hapa as an improved system for culturing of Clarias gariepinus fry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24176 | 19325 | 2018-05-13 18:59:45 | 24176 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fry management in aerated and non aerated aquarium and hapa system were determined in Fish Hatchery of Faculty of Agriculture, Shabu Lafia to assess condition factor, percentage survival rate, total body length and percentage weight gain. 200 hatchlings of Clarias.gariepinus fry were put into a 35 x 30 x 15cm aquarium with aerator and without aerator; hapa with aerator and hapa without aerator in 3 replicates. The hapas were made of brown colour plankton net. The fry were fed with 5% of their body weight with Artemia shell free four times daily for the period of sixteen days. Temperature(27.45 ~c 0.05~'C), pH (7.56 ~c 0.03); Dissolved oxygen (8.20 ~c 0.03 mg/L), total alkalinity (l5.36~c 0.03 mg/L) and Free carbon dioxide (4.30 ~c 0.03 mg/L) monitored in each of water quality parameter of the various treatments was not significantly different from each other. The Percentage weight gain (1117 and 1067), percentage survival rate (92.83 and 91.33), total body length(l.07 and 1.07cm) and condition factor (11.99 and 11.44) of C. gariepinus fry in hapa system (aerated and non aerated respectively) are significantly(p〈0.05) higher than those of aquarium in the study although they are not significantly different (P〉0.05) from each other. The use of hapa as an improved system for mass production of C. gariepinus fry is highly recommendable in the large body of water.
    Description: Includes: 1 table and 4 figure.;Also include: 7 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Nasarawa State ; Aquarium ; Aerator ; Fry ; Hatchlings ; Hapa ; Hapa ; freshwater environment ; Fish culture ; Freshwater fish ; Fry ; Hatcheries ; Condition factor ; Survival ; Length-weight relationships ; Aquaculture techniques ; Comparative studies ; Cage culture
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    Format: 102-105
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  • 6
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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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    Format: 110-114
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  • 7
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    Microbial load on smoked fish sold in Ibadan, Oyo State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24208 | 19325 | 2018-05-19 06:39:34 | 24208 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The microbial load of four different fish species from five different market locations in Ibadan metropolis were determined using standard microbiological procedures. The bacteria count of fish sampled from Ojo market was the highest while the bacteria count of the fish sample from Bodija market was the lowest. There was no significant difference (p〈0.05) in the microbial load of the fish sampled from various market locations in Ibadan metropolis. Similarly, there was no significant difference (p〉0.05) in the microbial load on various fish species sold in Ibadan metropolis. The isolated bacteria from the study were: E. coli, Salmonella spp, Klebsiella spp, Staphylococcus aureus, Aerosomonas spp, Pseudomonas spp, Vibrio spp, Serratia spp, Chromobacterium spp, Enterobacteria spp and Shigella spp. The fungi count of fish sampled from Omi markets was the highest while the fungi count of the fish sampled from Ojo market was the lowest. The following fungi were however isolated from the study: Aspergillus flavus, Penicillium spp, Fusarium oxysporum, Trrichoderma spp and Ceotrichium albidium. The study shows that reheating may be necessary to destroy or inactivate micro-organisms in smoked fish before consumption.
    Description: Includes: 2 tables and 2 figures.;Also includes: 17 refernces.
    Keywords: Fisheries ; Nigeria ; Ibadan ; Bacteria ; Fungi ; Market ; Fish species ; freshwater environment ; Microbial contamination ; Microorganisms ; Bacteria ; Freshwater fish ; Cured products ; Sample contamination ; Fungi ; Public health ; Quality assurance ; Disinfection
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  • 8
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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
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    Format: 265-268
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  • 9
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    Effect of zinc on the distribution of major cations and anions in the muscle of the fresh water catfish Clarias gariepinus (Burchell, 1822) collected from Ebonyi River, South East Nigeria (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24214 | 19325 | 2018-05-19 06:50:34 | 24214 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of zinc exposure evaluated during a four day exposure periods at 13.88ppm, 26.75ppm, 53.5ppm,107ppm and 214ppm to Clarias gariepinus sub-adults showed the 96h LC50 as 26.62ppm. The threshold value was 20.30ppm. The muscle of the exposed fish analyzed showed a significant decrease in all the major cations and anions (Na+, CL-, Ca2+ K+, Mg2+) at (p〈0.05). The research revealed that there was no total inhibition of uptake of the cations and anions and also that uptake of these metals, that is cations and anions (Na+,-CL-, Ca2+ K+, Mg2+) increased rapidly during the 24 hours and dropped at 48 hours and 72 hours and gradually increased at the end of 96 hours showing that it was time dependent. During exposure period, affected fish stood in upright position with their snouts above the water surface, gasping for air. Observation of the exposed fish showed that they were peeling of skin, increase in opercula movement, erratic swimming, quietness and finally death. This research therefore recommends that zinc should be applied appropriately at 26.30ppm to avoid death of fish, man and other aquatic organisms that are the chief consumer.
    Description: Includes: 13 references.
    Keywords: Pollution ; Fisheries ; Clarias gariepinus ; Nigeria ; Ebonyi State ; Ebonyi River ; Zinc ; Muscle ; Cations ; Anions ; Clarias gariepinus ; Zinc ; Freshwater fish ; Cations ; Pollution effects ; Trace metals ; Bioaccumulation ; Muscles ; Pollutants ; Anions ; River fisheries ; Lethal limits
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  • 10
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    Nutrient composition of frozen and smoked fish specimens of Oreochromis niloticus, Labeo coubie and Mormyrops deliciosus from River Niger (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24195 | 19325 | 2018-05-16 15:12:41 | 24195 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish is one of the most nutritious diet on earth, and contributes a considerable proportion of its protein to the Nigerian populace. Fifty-four specimens composing of six samples from each species, were analyzed in frozen and smoked states, monthly. Each set of six specimens were cut into two equal parts and randomly re-arranged into two groups. One group was smoked while the other was preserved in the freezer (at-2~'C) for 5 days. The highest moisture content was observed in frozen samples of Mormyrops deliciosus thus: (77.14 ~c 11.05%). Smoked O. niloticus had the highest protein content (26.79 ~c 0.74%) while the least was observed in frozen Mormyrops deliciosus (13.37 ~c 2.57%). Smoked samples of Oreochromis niloticus recorded the highest fat content accounting for a value of (25.97 ~c 0.51 %) while the least was observed in frozen Mormyrops deliciosus (7.97 ~c 0.45%). It could be concluded that while frozen samples loosed nutrient, smoked ones gained nutrients in all three species. The study recommends that fish be consumed in their smoked state, in preference to frozen ones, in response to higher nutritive value. Oreochromis niloticus which recorded the highest nutritive value in crude protein content, should be consumed more, followed by Labeo coubie and Mormyrops deliciosus in that order.
    Description: Includes: 2 tables.;Also includes: 10 references
    Keywords: Fisheries ; Mormyrups deliciosus ; Oreochromis niloticus ; Labeo coubie ; Nigeria ; Niger R. ; Nutrient omposition ; Frozen ; Smoked ; Oreochromis niloticus ; Labeo coubie ; Mormyrups deliciosus ; freshwater environment ; Freshwater fish ; Frozen products ; Cured products ; Nutritive value ; Comparative studies ; Processed fishery products
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  • 11
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    Migration in fishes: a review (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24232 | 19325 | 2018-05-19 07:26:04 | 24232 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A review of migratory activity in fishes reveals that migration is important for the completion of life cycle. Recent studies have increasingly demonstrated the wide spread existence of spatio-temporal variations in the abundance and distribution of species of freshwater fishes, previously assumed not to move between habitats. These movements are often for spawning, feeding and refuge, and in many cases are fundamental for the successful completion of life cycles. Chemical and physical changes in water environment affect the migration of fish. Most fish undertake feeding, breeding or wintering migrations. A number of studies have documented the influence of freshwater and ocean conditions, climate variability and human impacts resulting from impoundment and aquaculture on fish migration.
    Description: Includes: 27 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Borno State ; freshwater environment ; Migrations ; Geographical distribution ; Spatial variations ; Temporal variations ; Freshwater fish ; Life cycle ; Environmental conditions
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    Format: 319-321
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  • 12
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    Toxicity of unripe Ackee apple (Blighiasapida) fruit extract on Clarias gariepinus fingerlings (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24201 | 19325 | 2018-05-16 15:24:45 | 24201 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to determine the toxicity of unripe Ackee apple (Blighiasapida) fruit extract on catfish, Clarias gariepinus fingerlings using the 96-hour bioassay under laboratory condition. The LC50 was determined graphically as 3.00ppt. Mean mortality was 0, 40, 50, 70 and 80% in the concentrations of 0, 3.33, 3.47,3.60 and 3.73ppt. Statistical analysis of the results showed that there were significant differences (P〈0.05) on the effect of concentration. Mortality increased with increase in concentration of toxicant and duration of exposure. Clarias gariepinus showed erratic swimming pattern, loss of reflex which increased with increase in concentration. Histopathological changes were revealed in the gills, skin and heart of the fish. The gill structure was altered and there were moderate mucosal erosion. There were several lymphoid aggregations with fibrous connective tissue at the dermal and epidermal areas in the skin. The heart myofibre were diffusely disintegrated with edema between bundles.
    Description: Includes: 1 table and 7 plates.;Also includes: 8 references.
    Keywords: Health ; Aquaculture ; Clarias gariepinus ; Nigeria ; Ado-Ekiti ; Fruit Extract ; freshwater environment ; Toxicity ; Artificial feeding ; Food composition ; Chemical composition ; Histopathology ; Freshwater fish ; Fingerlings ; Toxicants ; Mortality ; Fish culture ; Controlled conditions ; Lethal limits
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  • 13
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    Influence of uptake route on the bioconcentration of polycyclic aromatic hydrocarbon (PAH) by the Red Sea bream (Pagrus major) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24244 | 19325 | 2018-05-20 05:41:08 | 24244 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species have different responses to polycyclic aromatic hydrocarbons (PAHs) exposure to crude oil. Some achieve PAH biotransformation while others have bioconcentration. These trends may be specie-specific and may depend on PAH uptake route - through water or food. PAH uptake in the red sea bream, Pagrus major for PAH biomonitoring in Asian oil spill waters was assessed in water-borne and dietary exposures of the fish to four representative PAHS. In the water-borne exposure, juvenile fish of average weight 83g were exposed in a flow-through toxicity test for ten (10) days to a mix of 30~kg/L phenanthrene, pyrene, and chrysene; 3~kg/L of benzo[a] pyrene (B[a]P). In the dietary exposure, 20 juveniles of average weight 80g were fed diets with 10 n g/g phenanthrene, pyrene and chrysene, and 2 n g/g of B[a]P for ten days. Fish livers were sampled for PAH concentrations on days 0, 2, 5 and l0 in both exposures. Phenanthrene PAHs were accumulated in the water-borne exposure with concentrations increasing with duration of exposure. Phenanthrene had the highest concentration of 2210 ng/g on day 10, while pyrene and chrysene were 170 and 45 ng/g respectively. B[a]P was not accumulated. ln the dietary exposure, all the test PAHs were accumulated. Bioconcentration decreased with duration of exposure, unlike in the water-borne exposure which was the reverse. Phenanthrene, with an initial 58 ng/g concentration, was reduced to 10.6 ng/g on day 10. B[a]P accumulation in the dietary exposure is significant. PAH accumulation was higher in the water-borne exposure than in the dietary exposure and PAH bioconcentration in the fish depends on uptake route.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Pollution ; Pagrus major ; Nigeria ; Makurdi ; freshwater environment ; Aromatic hydrocarbons ; Freshwater fish ; Crude oil ; Bioaccumulation ; Response analysis ; Biomanipulation ; Pollution monitoring ; Controlled conditions ; Toxicity tests ; Oil pollution
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  • 14
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    Influence of indices of reproduction on condition factor and some morphometric features of Tilapia guineensis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24246 | 19325 | 2018-05-20 05:44:32 | 24246 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The influence of indices of reproduction (Gonadosomatic index-GSI-and Hepatosomatic index -HSI-) on condition factor and morphometric features of Tilapia guineensis were examined using 160 fish comprising 70 females and 90 males. Total length, standard length and body depth were measured to the nearest 1cm, while each fish was weighed to the nearest 0.1 g. The gonads and liver were removed and weighed separatdy to the nearest 0.00lg. Gonadosomatic index, Hepatosomatic index and condition factor were calculated. Correlation analysis between the reproductive indices and the external features of the fish were carried out. Results revealed positive correlation between gonadosomatic index and body depth and between GSI and standard length in both sexes, indicating the dependence of gonadal development on body depth and standard length in both sexes. However, the relationship between the reproductive indices and total length was significant only in the female. The relationship between HSI and Standard length was also significant in female (P〈0.01, r = 0.707) and male (P〈0.05, r = -0.216), but in positive and negative direction-respectively. The correlation between the reproductive indices and condition factor were not significant in both sexes. The correlation of GSI and HSI in male (r = 0.062) was not significant, while the positive correlation of GSI and HSI in female (r= 0.300) was significant (P〈0.05). It was therefore concluded that body depth and standard length could be important factors in determining spawning success in both sexes, while total length may be an additional tool in determining spawning success only in female T. guineensis.
    Description: Includes: 24 references.
    Keywords: Fisheries ; Tilapia guineensis ; Nigeria ; Port Harcourt ; Condition factor ; Gonadosomatric index ; Hepatosomatic index ; Morphometric feature ; Spawning ; Tilapia guineesis ; freshwater environment ; Reproduction ; Condition factor ; Morphometry ; Freshwater fish ; Sex ; Gonads ; Spawning ; Length-weight relationships ; Gonadosomatic index
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  • 15
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    Assessment of some heavy metals pollution in Clarias gariepinus in the vicinity of Lake Chad, Nigerian sector, using energy dispersive X-ray fluorescence (EDXRF) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24243 | 19325 | 2018-05-20 05:39:07 | 24243 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Globally, aquatic ecosystems are highly polluted with heavy metals from anthropogenic and terrigenous sources. The objectives of this study, is to portray the use of EDXRF for the analysis of heavy metal pollution in Clarias gariepinus. C. gariepinus were collected from Dumba, Lake Chad, Nigerian sector and analyzed with EDXRF with 〈sup〉109〈/sup〉Cd as excitation source of the samples. The concentrations of Cadmium, Chromium, Copper, Manganese, Iron, Lead and Zinc (Cd, Cr, Cu, Mn, Fe, Pb and Zn) in mg/kg were determined in C. gariepinus and were compared with World Health Organization (WHO, 1985) and Federal Environmental Protection Agency (FEPA, 2003) to ascertain the level of Cd, Cr, Cu, Mn, Fe, Pb and Zn in C. gariepinus from Dumba. The results indicated that C. gariepinus is polluted with Cr, Cu, Mn, and Pb when compared with permissible limit of WHO, 1985 and FEPA, 2003. Therefore, the consumption of C. gariepinus from Dumba may pose a health risk.
    Description: Includes: 12 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Borno ; Chad L. ; freshwater environment ; Heavy metals ; Pollutants ; Freshwater fish ; X-ray fluorescence analysis ; Standards ; Acceptability ; Pollution effects ; Cadmium ; Chromium ; Copper ; Manganese ; Iron ; Lead ; Zinc
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    Length-weight relationship and condition factor of Citharinus citharus (Geoffroy Saint-Hilaire, 1809) from Lake Akata, Benue State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24247 | 19325 | 2018-05-20 05:46:20 | 24247 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Length-weight relationship and changes in the condition factor of Citharinus citharus of the Lake Akata, an ox-bow Lake of River Katsina-Ala, a tributary of River Benue was studied. A total of five hundred and five (505) fish samples were collected from May 2008-April 2009. Length-weight relationship of fish was estimated from the equation: W = a.Lb which was transformed to base 10 logarithm, and condition factor (k) was determined using the equation: K=100W/L3. Both sexes of C. citharus in Lake Akata exhibited negative allometric growth pattern. The combined length weight relationship of C. citharus sexes was LogW = - 1.7738 + 2.9044 LogL (r2 = 0.9527). The coefficient of determination for the Length-Weight relationship for both sexes of C. citharus in Lake Akata was strongly positive. The mean condition factor for the combined sexes was 1.37 ~c 0.02, but individually, female C. citharus were in better condition (1.44 ~c 0.03) compared to the males (1.29 ~c 0.02). The condition factor of C. citharus in dry season (1.37 ~c 0.03) was not significantly higher than that of (1.36 ~c 0.03) in wet season (p〉0.05). This means the fish species are living well in the lake as the 'K' value are greater than one.
    Description: Includes: 25 references.
    Keywords: Ecology ; Fisheries ; Citharinus citharus ; Nigeria ; Akata Lake ; Growth pattern ; Seasonal condition ; Citharinus citharus ; Lake Akata ; freshwater environment ; Length-weight relationships ; Condition factor ; Freshwater fish ; Lake fisheries ; Growth rate
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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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    Growth performance of Clarias gariepinus fingerlings fed diets with graded levels of yeast (Saccharomyces cerevisiae) used as a floater additive in concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24159 | 19325 | 2018-05-13 13:04:38 | 24159 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Completely randomized design with duplicate groups were used to study the growth performance of 400 fingerlings of Clarias gariepinus in 2m x 2m x 1m concrete tanks in an out-door hatchery complex of National Institute for Freshwater Fisheries Research (NIFFR), New Bussa, Niger State, Nigeria. Graded levels (0, 1,2,3 or 4) % of yeast (Saccharomyces cerevisiae) was included into a 40% crude protein (C.P) NIFFR floating basal diet and fed to Clarias gariepinus in tanks for 16 weeks and 35% in the last 4 weeks. This was to determine the optimum level of supplemental yeast inclusion as a floater additive into diets of C. gariepinus and to quantify feed and its cost for raising a kilogram of the fish fed diets. The experiment was geared towards development of cost effective standard floating feed for Clarias gariepinus. There was no significant difference in weight gain (WG), feed consumed (FC), specific growth rate (SGR), survival, cost of feed consumed (CFC) and palatability test of flesh (P〉0.05) except FCR (P〈0.05) and feed cost per kilogram of fish (P〈0.05) at the end of 8 and 20 weeks. There was no histopathological defect observed on the fish and fish carcass. It was concluded that 2% or 1 % level of yeast can be included in NIFFR floating feed with the assurance of producing a kilogram of C. gariepinus with a feed of N300.00 under good management practices based on ingredient ruling price at the time of this study and this might be capable of increasing farmer's income in fish production.
    Description: Includes: 1 table and 2 figures.;Also includes: 21 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Niger ; Yeast ; Floating additives ; Performance ; Clarias gariepinus ; freshwater environment ; Growth rate ; Freshwater fish ; Fingerlings ; Artificial feeding ; Feeding experiments ; Feed ; Yeasts ; Additives ; Culture tanks ; Cost analysis ; Performance assessment ; Fish culture
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    Growth performance and nutrient utilization of post fingerlings Clarias gariepinus fed varied levels of biscuit waste (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24162 | 19325 | 2018-05-13 13:15:18 | 24162 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A feeding trial was conducted to determine the effect of biscuit waste meal on the growth performance and utilization of Clarias gariepinus juveniles. A total of 300 juveniles of average weight 8.85g were randomly divided into 5 Treatments, each with three replicates. Twenty juveniles were distributed into fifteen happas (0.7m3) and each happa was suspended to 3/4 of its volume using kuralon ropes carefully tied round the bamboo poles across the concrete tanks. Five diets containing 40% crude protein were formulated in which maize was replaced with biscuit waste meal at Treatment diet 1 (TD1) 0%, 25% (TD2), 50% (TD3), 75% (TD4), 100% (TD5) levels.The juveniles were fed at 3% body weight per day for 10 weeks. It was recorded at the end of the experiment that biscuit waste was most suitable as an energy supplement when incorporated at 25% replacement (TD2) with maize. TD1 had the highest weight gain followed by TD2, TD3, TD4 and TD5 respectively. There were no significant differences (P〉0.05) in the growth response in TD1 (0%), T0D (25%) and TD3 (50%). It is therefore concluded that biscuit waste meal is a cheap source of non conventional energy source which can be used favorably to replace maize (25% inclusion level) as an energy source in the diets of Clarias gariepinus.
    Description: Includes: 7 tables.;Also includes: 15 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Abeokuta ; Treatment ; Biscuit waste ; Net hapa ; Juvenile ; Crude protein ; freshwater environment ; Growth rate ; Nutrition ; Freshwater fish ; Fingerlings ; Diets ; Wastes ; Feed ; Feeding experiments ; Fish culture
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    The effects of Baker's yeast (Saccharomyces cerevisiae) on rearing of Heterobranchus longifilis: growth and survival in outdoor concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24158 | 19325 | 2018-05-13 13:02:50 | 24158 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Heterobranchus longifilis juveniles (93.42 - 147.77g) used for this study were product of an indoor experiment in glass aquaria transferred to outdoor tanks. This study is therefore, a continuation of the indoor study using the same feed for the fish outdoors for 230 days. They were stocked in ten concrete tanks, of sizes 2m X 2m. The fish were stocked according to the number harvested from the indoor experiment for each treatment. The experimental diets were prepared with fish meal, soybean, groundnut cake, wheat offal, yeast, premix, starch, vitamin C and Vitamin B-complex to meet the requirement of H. longifilis. The analyzed crude protein in each diet was 42.56%, 43.32%, 4369%,43.86% and 43.98%. There was significant variation (p〈0.05) in the Mean Final Weight (MFW), Mean Weight Gain (MWG), Protein Efficiency Ratio (PER), Specific Growth Rate (SGR) and Percentage Survival (PS). The survival of the fish was highest with the fish fed 2g yeast/I00g of diet and this was not significantly different from fish fed 1g yeast/ 100g diet. The cost of production of one kilogram of fish using varying levels of S. cerevisiae in diets varied significantly (p〈0.05).
    Description: Includes: 2 tables.;Also includes: 18 references.
    Keywords: Aquaculture ; Ecology ; Heterobranchus longifilis ; Nigeria ; Niger ; Growth ; Survival ; Heterobranchus longifilis ; Yeast ; freshwater environment ; Freshwater fish ; Yeasts ; Artificial feeding ; Diets ; Feeding experiments ; Culture tanks ; Growth rate ; Survival ; Fish culture
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    Preliminary investigation of Tribulus terrestris (Linn. 1753) extracts as natural sex reversal agent in Oreochromis niloticus (Linn. 1758) larvae (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24169 | 19325 | 2018-05-13 18:49:22 | 24169 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Five pairs of brood stocks of Oreochromis niloticus (average weight of 350 ~c 25.8g) in a ratio of 1:1 male to female were used for the fry production to examine the prospect of utilization of safer and natural extract (Tribulus terrestris) as sex reversal agent in tilapia population control. Four hundred and fifty day-old fry were randomly distributed into 18 experimental tanks (30 litres capacity) representing five test diets (50% crude protein) containing varying inclusion levels of Tribulus terrestris extract at 0.0, 1.0, 1.5, 2.0, and 2.5g per 1kg of basal feed while diet six contain 50mg per 1kg of basal feed of 17-a-methyltestosterone (MT) served as the control diet. The growth performance parameter indices measured were Mean Weight Gain (MWG), Food Conversion Ratio (FCR) and Specific Growth Rate (SGR). At the end of the study, the survival rates and sex ratio were also measured and recorded. Data collected were subjected to 2-way analysis of variance (ANOVA) where significant means were tested using the Least Significant Difference (LSD) test at p = 0.05.
    Description: Includes: 3 tables.;Also includes: 17 references.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Ibadan ; Sex reversal ; Tribulus terrestris ; Oreochromis niloticus ; freshwater environment ; Sex reversal ; Agents ; Freshwater fish ; Genetically modified organisms ; Monosex culture ; Survival ; Growth rate ; Population control ; Fish culture ; Aquaculture techniques
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    The effects of dichlorvos (2, 2 - dichlorovinyl phosphate (DDVP)) induced stress on the growth of fingerlings of Clarias gariepinus (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24165 | 19325 | 2018-05-13 13:30:18 | 24165 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to determine the effects of dichlorvos ~9 2, 2 - dichlorovinyl dimethyl phosphate (DDVP)~0 on the growth of Clarias gariepinus fingerlings. The experiment was conducted in two phases: the first phase involved the exposure of the fish to different concentrations ~9 0.00 (control), 0.4ppm, 0.5ppm, 0.6ppm, 0.7ppm, 0.8ppm, 0.9ppm, 1.0ppm, 1.1 ppm and 1.2ppm~0 of dichlorvos for four days. The second phase was a recovery process in which the fish that survived from the first phase were introduced into clean, dechlorinated, toxicant-free water and were fed at 3% of their body weight for 12 weeks. The change in weight was measured every fortnight and the feed fed was adjusted to accommodate the change in weight. The highest values for weight gain, percentage weight gain, specific growth rate and average daily weight gain occurred in the control and these values were significantly (p〈0.05) higher than the values of these parameters recorded in the other treatments. The range of values of weight gain, percentage weight gain, specific growth rate and average daily weight gain are 6.76 ~c 3.01-18.45 ~c 8.90g, 69.45 ~c 18.52 - 105.52 ~c 33.67%, 1.54 ~c 0.33 - 2.08 ~c 0.46%/day and 0.48 ~c 0.21 - 1.21 ~c 0.65g respectively. Based on the results of this study, the exposure of fingerlings of Clarias gariepinus to dichlorvos ~9 2, 2- dichlorovinyl dimethyl phosphate (DDVP)~0 affected the growth of the fish. Therefore, the use of dichlorvos on stored grains should be regulated because uncontrolled usage could cause mortality and impairment of growth in fish if the pesticide gets washed into water bodies inhabited by fish.
    Description: Includes: 1 table.;Also includes: 9 references.
    Keywords: Aquaculture ; Ecology ; Pollution ; Clarias gariepinus ; Nigeria ; Lagos State ; Toxicity ; Pesticide ; Clarias gariepinus ; Growth performance ; freshwater environment ; Freshwater fish ; Fingerlings ; Toxicants ; Pesticides ; Toxicity ; Bioaccumulation ; Feeding ; Growth rate ; Pollution effects
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    Analysis of activity concentrations due to natural radionuclides in the fish of Kainji Lake (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24242 | 19325 | 2018-05-20 05:37:02 | 24242 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted for natural radioactivity of some fish samples from Kainji Lake, situated between latitudes 9~' 50' - 10~' 57' North and longitudes 4~'25'-4~'45' East, New Bussa, Niger state, Nigeria, using gamma spectroscopy method with Nal(TI) detector. Radioactivity a phenomenon that leads to production of radiations, and radiation is known to trigger or induce cancer. The fish are analyzed to estimate the radioactivity (activity) concentrations due to natural radionuclides (Radium 222(226Ra), Thorium 232(232Th) and Potassium 40 (40K). The obtained result shows that the activity concentration for (226Ra), in all the fish samples collected ranges from 16.06 ~c 0.44 Bqkg-1 to 67.39 ~c 12.34 Bqkg-1 with an average value of 37.22 ~c 4.31 Bqkg-1. That of 232Th, ranges from 42.66 ~c 0.81 Bqkg-1 to 200.6 ~c 10.66 Bqkg-1 and the average value stands at 94.82 ~c 3.82 Bqkg-1. The activity concentration for 40K, ranges between 243.3 ~c 1.56 Bqkg-1 to 384.98 ~c 11.97 Bqkg-1 and the average is 618.2 ~c 26.81 Bqkg-1. This indicated that average daily intake due to natural activity from the fish is valued at 0.999 Bq/day, 2.545Bq/day and 10.31 Bq/day for 226Ra, 232Th and 40K respectively. This shows a promising result, since the activity concentration values for most of the fish are within the acceptable limits. However location Upstream02 (9~'51'.285~AN, 4~'35'.533~AE) and Upstream07 (9~'51'.285~AN, 4~'35'.533~AE) fish, became outliers with significant values of 1 13.10~kSvy-1 and 121.68~kSvy-1 effective dose. This could be attributed to variation in geological formations in the lake as well as the feeding habits of these fish. The work shows that consumers of fish from Kainji Lake have no risk of radioactivity ingestion, even though no amount of radiation is assumed to be totally safe.
    Description: Includes: 16 references.
    Keywords: Environment ; Fisheries ; Nigeria ; Kainji L. ; Radioactivity ; Dose ; Radionuclides ; freshwater environment ; Radioisotopes ; Freshwater fish ; Radiation hazards ; Radioactive contamination ; Geological hazards ; Lake fisheries ; Feeding behaviour ; Health and safety ; Toxicants ; Radioactivity ; Bioaccumulation
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    Acute toxicity of 2, 3-dichlorovinyl dimethyl phosphate (Sniper 1000EC) and response of Clarias gariepinus Burchell under laboratory conditions (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24215 | 19325 | 2018-05-19 06:53:11 | 24215 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study investigated the acute toxicity of 2, 3-dicholrovinyl dimethyl phosphate (Sniper 1000EC) on the African mud catfish, Clarias gariepinus juveniles (mean weight 19.47 ~c 1.05g) using static bioassay method. Sniper 1000EC is an organophosphate pesticide. Each treatment in the acute test was in triplicate with bioassay media concentration of 0,5, 10, 15 and 20 mg/l. Data on mortalities of fish, water physic-chemical parameters as well as changes in haematological indices were subjected to one way analysis of variance (ANOVA) at 5% probability level. Duncan multiple range test was used to separate differences between the means. The 96hr LC50 estimated by probit analysis during the exposure was found to be 8.20mg/l. Behavioural abnormalities of the exposed fish included erratic and uncoordinated swimming and bleached skin with lesion at the highest concentration (20mg/l). Blood dyscrasias attributable to the toxicant was observed with a significant (p〈0.05) decrease in haemoglobin, haematocrit, red blood cells, white blood cells, lymphocytes and monocytes. Mean corpuscular volume (MCV), Mean corpuscular haemoglobin (MCH), neutrophils, eosinophil and basophil increased significantly (p〈0.05) with increasing concentrations of the toxicant. These abnormalities in body and blood parameters as a result of exposure to the toxicant make the study to recommend that the use of Sniper 1000EC by local fishermen be banned to preserve aquatic lives in Nigerian inland water bodies.
    Description: Includes: 22 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Niger State ; Sniper 1000EC ; Clarias gariepinus ; Toxicity ; Haematological indeces ; freshwater environment ; Toxicity ; Phosphate deposits ; Response analysis ; Freshwater fish ; Juveniles ; Bioassays ; Toxicity tests ; Physicochemical properties ; Controlled conditions ; Haematology ; Pollution monitoring
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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
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    Haematological changes of Clarias gariepinus juveniles fed different dietary lipid (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24234 | 19325 | 2018-05-19 07:29:20 | 24234 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Twelve weeks feeding trial was conducted to determine the effects of different dietary lipid sources on the hematological changes in Clarias gariepinus juveniles. Six (6) iso-nitroginous diets were formulated at 45% CP and fed to triplicate groups of 15 juveniles. The feed contained (Palm Seed Oil (PSO), Ugwu Seed (USO), Soya Bean Oil (SBO), Almond Seed Oil (ASO), Mixture Of All the vegetable oil + the fish oil (MOA) and Cod Liver Oil (CLO) which is the control. The oils were added at 5% inclusion level respectively. Fish of mean weight 22.83 ~c 0.30g were fed these experimental diets in triplicate groups. The hematological analyses of fish showed that red blood cell, white blood cell, Erythrocyte sedimentation rate ( ESR), Mean cell volume (MCV), Mean cell Haemoglobin (MCH) and packed cell volume were not significantly different (p〈0.05), but haemoglobin concentration and Mean cell haemologlobin concentration (MCHC) were significantly different (p〉0.05). The present study showed that PSO, USO, ASO, SBO and MOA can effectively replace cod liver oil without compromising the health of African catfish, Clarias gariepinus.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Dietary lipid ; Juveniles ; Haematology ; Clarias gariepinus ; Haematology ; Phase changes ; Freshwater fish ; Juveniles ; Diets ; Lipids ; Feeding ; Feed ; Blood cells ; Fish oils ; Experimental research ; Laboratory culture
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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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    Global warming: implications on freshwater fish, a review (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24099 | 19325 | 2018-05-16 13:12:57 | 24099 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Global warning and climate change are growing environmental concerns which are much in the scientific, governmental and public eye are present. The potential impact on freshwater fish is immense because most fish have no physiological ability to regulate their body temperature.
    Description: Includes: 21 refs
    Keywords: Environment ; Fisheries ; Pollution ; Nigeria ; Global warming ; Climate change ; Freshwater fish ; freshwater environment ; Freshwater fish ; Spawning ; Biological stress ; Environmental impact ; Environmental assessment ; Body temperature ; Legislation ; Global warming ; Climatic changes
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  • 29
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    Survey of physical characteristics of the upper reaches of new Calabar River, Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Physico-chemical parameters in relation to fish production of Dadin Kowa Dam, Gombe State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Impact of feeding diets containing Luffa cylindrica seedmeal on the variable cost of production of African catfish, Clarias gariepinus (Burchell 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24157 | 19325 | 2018-05-13 13:00:52 | 24157 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigates the use of Luffa cylindrica seed meal as soybean replacer in the diet of Clarias gariepinus. Five isonitrogenous diets containing soybean meal which was replaced by Luffa cylindrica at a rate of 0, 15,30,45 and 60% were made. The diets without Luffa cylindrical seed meal served as the control. Experimental diets were assigned randomly to the tanks and each group of fish was fed 5% body weight in equal proportion per day. The fish fed diet 1 had the highest incidence of cost, while the fish fed diet 4 had the lowest incidence of cost. There was no significant difference (P〉0.05) in the incidence of cost of producing 1kg fish with the different dietary treatments. The fish fed at diet 4 had the highest profit, while the fish fed at diet 1 had the lowest profit. There was no significant difference (P〉0.05) in the profit margin of producing 1kg fish with the different dietary treatments. The incidence of cost showed that it was cheaper to produce 1kg of fish with Luffa cylindrical seed meal because feeding the fish with the diet (control and tests diets) left some profit margin.
    Description: Includes: 5 tables.;Also includes: 18 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Ogun State ; freshwater environment ; Diets ; Freshwater fish ; Artificial feeding ; Feeding experiments ; Fish culture ; Production cost
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    Effects of partial and total replacement of soyabean meal with pigeon pea (Cajanus cajan) as alternative plant protein source in the diet of juvenile African mud catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24160 | 19325 | 2018-05-13 13:07:24 | 24160 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A 56-day feeding trial to investigate the effects of feeding varying levels of substituted Soybeam meal (SBL) with Pigeon pea seed meal (PSM) on the performance and carcass characteristics of Clarias gariepinus was conducted. Five isonitrogenous 40% crude protein diets were formulated where PSM Clarias gariepinus (15.74 ~c 1.22g) stocked at 15 fish/50 litres tanks were fed diets in triplicates twice daily to satiation and weight changes recorded weekly. Fish fed diet with 25% and 100% PSM inclusion gave the highest mean weight gain of 25.47g and 23.34g respectively (P〉0.05). There were no significant difference (P〉0.05) among the weight gain of other treatments. Fish fed diet containing 0% SBM and 100% PSM gave the highest gross food conversion efficiency and percentage weight gain of 43.50g and 12.l8g while fish fed diet containing 50% SBM and 50% PSM had the lowest of 35.67 and 9.99 respectively with no significant changes compared with other treatments. For good growth, fish farmers are advised to consider Pigeon pea seed meal either as a partial (25%) or total replacement (100%) for soybean meal in the diet of Clarias gariepinus juveniles.
    Description: Includes: 5 tables.;Also includes: 19 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Lagos ; Soyameal ; Pigeon pea ; Clarias gariepinus ; Protein source ; freshwater environment ; Diets ; Freshwater fish ; Artificial feeding ; Feeding experiments ; Proteins ; Juveniles ; Feed efficiency ; Growth rate
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    The effect of feeding regime and rate on the growth of Clarias gariepinus (Burchell, 1822) fingerlings fed with artificial feed (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24163 | 19325 | 2018-05-26 12:00:29 | 24163 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish growth is a function of adequate supply of feed in the right quantity and time. The effect of feeding rate on the growth of Clarias gariepinus (Burchell, 1822) was studied for a period of 22 weeks. The fish were fed at the same percentage body weight throughout the study period and a bi-weekly weight gain was measured. Water quality parameters were also monitored. There was a significant increase in weight gain in daily feeding regime than in the ones in two days feeding regime. The increase in weight for the daily feeding regime was visible as from the 8th week while that for the ones in two days feeding was only significantly different in 22nd week at 0.05 level of significance. The relationship between the two feeding regime types also revealed that the daily feeding performed better than the ones in two days feeding regime.
    Description: Includes: 2 tables.;Also includes: 10 references.
    Keywords: Aquaculture ; Pollution ; Ecology ; Clarias gariepinus ; Nigeria ; Niger ; Feed ; Fish growth ; Feeding regime and weight gain ; freshwater environment ; Feeding ; Growth rate ; Freshwater fish ; Fingerlings ; Length-weight relationships ; Water quality ; Fish culture
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    The future of tilapia culture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24168 | 19325 | 2018-05-16 14:30:33 | 24168 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The culture of tilapia is assuming a greater importance globally. However, Nigeria's contribution to global production is insignificant. Although Egypt and Nigeria were the only African countries that had record of tilapia production in 1950, Egypt has left Nigeria far behind. The problem of prolific breeding still persists in our farm, making it difficult to raise tilapia to a good market size. The paper reviews Nigeria fish production, supply and demand forces and the contributions of leading tilapia producers; namely China, Thailand, Indonesia Egypt to mention a few. It reiterates some of the credentials of tilapia that makes it a good candidate for culture, the species for culture and the place of tilapia in the world fish market. The paper examines some of the limiting factor hindering the development of tilapia Industry and ways of mitigating such factors.
    Description: Includes: 16 references.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Lagos ; freshwater environment ; Fish culture ; Freshwater fish ; Limiting factors ; Breeding success ; Aquaculture development
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    Use of proviron tablets as source of androgen for sex reversal of Nile tilapia (Oreochromis niloticus, Linnaeus 1758) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24167 | 19325 | 2018-05-13 18:46:44 | 24167 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of proviron tablets (1a-methyl androsterone) as a masculinization agent was tried on frys of Oreochromis niloticus (Nile Tilapia). 900 Healthy four (4) day old fry of Oreochromis niloticus (D XVII -XVIII, 12-14; A III, 8-10) with mean initial length 1.0cm and mean initial weight 0.0153g were subjected to two feeding treatments. Treatment one (T〈sub〉1〈/sub〉) replicated twice, consisted of 150 fry in a 100L capacity circular plastic basin containing 35 Litres of clean borehole water. Treatment Two (T〈sub〉2〈/sub〉) replicated 4 times contained 150 fry each in similar environment as T〈sub〉1〈/sub〉, however the replicates were fed a starter blended hormone diet containing 60mg of hormone per kilogram of coppens feed. All the treatments were fed at 20% body weight the first week and reduced by 5% weekly till the 4th week. The experimental fishes were transferred from their replicate basins to 6 hapas measuring 1m x 1m x 1m submersed in a concrete pond of dimension 5m x 8m x 1.5m containing algae. The fishes in the hapas fed adlibitum on algae and non-treated 2mm coppens supplementary feed. The result showed that a sample of 164 hormone treated dead fry in the 3rd week following mass mortality were all male. Also when the experiment was terminated in the 9th week all 406 hormone treated fish in 4 hapas were all male (100%). The sex ratio in the 236 untreated fish was 110 males (46.61%) and 126 females (53.39%). The mean weight gain and specific growth rate (SGR) in parenthesis for the sexes in different treatments was: Hormone treated males 4.66g (3.94), untreated males 4.52g (3.92) and untreated females 4.16g (3.87). It was concluded that proviron (la-methylandrosterone) can achieve 100% sex reversal in Oreochromis niloticus and used in place of methyltestosterone, and that hormone treated males grew faster and bigger than untreated males and females. Research on the effect of different doses of proviron on sex reversal of Nile tilapia was recommended.
    Description: Includes: 3 tables.;Also includes: 6 references.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Imo State ; Sex reversal ; Oreochromis niloticus ; Proviron 1a-methlyandrosterone ; Fry ; freshwater environment ; Sex hormones ; Sex reversal ; Aquaculture ; Feeding ; Freshwater fish ; Genetically modified organisms ; Sex ratio ; Mortality ; Drugs
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    Growth performance and feed utilization of mudfish Heterobranchus longifilis juveniles fed varying dietary protein levels (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24171 | 19325 | 2018-05-13 18:52:27 | 24171 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Mudcatfish (Heterobranchus longifilis) juveniles (body weight 61.60-83.05g, length 204.43 ~c 3.07 - 229.53 ~c 3.65mm) were fed with diet containing crude protein (CP) levels of 30%,35% and 40% for 10 weeks, using fishmeal as a protein source. Growth performance and feed utilization were investigated. Fish were raised in plastic aquaria of dimension 46 x 38 x 28cm3 at a temperature range of 26.0-29.0~'C, pH value of 6.6-7.4 and dissolved oxygen of 3.5-5.1 mg/1. The highest increase in body weight (23.30 ~c 4.30g) and specific growth rate (0.68 ~c 0.02% day-1) were achieved with Diet 2 (35%CP). The condition factor ranged 0.60 ~c 0.009- 0.66 ~c 0.005 and fish survival was 100% for all diets. Protein efficiency ratio (2.37 ~c 0.35) was also significantly better with 35% CP (p〈0.001). Diets 1(30% CP) and 2 (40% CP) gave lower performances. The observations in this study suggest that a 35% high quality protein diet will probably provide the needed protein requirement for H.longifilis juveniles.
    Description: Includes: 3 tables.;Also includes: 13 references.
    Keywords: Aquaculture ; Ecology ; Heterobranchus longifilis ; Nigeria ; Bayelsa ; Heterobranchus longifilis ; juveniles ; Protein ; Feed utilization ; freshwater environment ; Growth rate ; Feed ; Utilization ; Freshwater fish ; Juveniles ; Diets ; Proteins ; Fish meal ; Condition factor ; Survival ; Feeding experiments ; Fish culture
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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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    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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    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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    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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    Toxicity of oil-based drilling mud (OBM) on the survival of the fingerlings of Niger Delta mudskipper, Periophthalmus papilio (Boch and Schneider, 1801) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24221 | 19325 | 2018-05-19 07:04:22 | 24221 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The toxicity of oil - based drilling mud on the survival of the fingerlings of Niger Delta mudskipper, Periophthalmus papilio were studied using static plastic tanks. The exposure period lasted for 96 hours. Lethal concentration (LC50) and lethal time (LT50) were determined. The control tanks contained no oil- based drilling mud. Results revealed increased in mortality values of the fish to all lethal concentrations. There was no mortality observed in the control tank. The oil- based drilling mud were toxic on Periopthalmus papilio.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Pollution ; Periophthalmus papilio ; Nigeria ; Rumuche River ; Drilling fluid ; Mortality ; Lethal concentration (LCsub50/sub) ; Bioassay ; freshwater environment ; Toxicity ; Drilling platforms ; Drilling ; Mud ; Fingerlings ; Freshwater fish ; Survival ; Pollution effects ; Mortality ; Lethal effects ; Drilling fluids ; Experimental research ; Toxicity tests
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    Microbiological status of water and fish samples from Jabi Lake, Abuja (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24224 | 19325 | 2018-05-19 07:11:26 | 24224 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Jabi Lake is a natural water body in Abuja Federal Capital Territory (FCT). It was expanded for commercial fishing following relocation of Nigeria's headquarters to Abuja in 1993. Quantitative analysis of microbiological status of water and fish from the Lake was carried out. Samples were collected from the dam site, open water, middle lake and inlet. Result reveal that total coliform count which are indicators of pollution are high (2.0 x 103 cfu/ml, 1.1 x 103 cfu/ml, 1.0 x 103 cfu/ml and 1.1 x 103 cfu/ml for dam site, open water, middle lake, and inlet respectively). Total viable count too is high (9.2 x 103 cfu/ml, 4.9 x 103 cfu/ml, 4.6 x 103 cfu/ml and 4.9 x 103 cfu/ml for dam site, open water, middle lake and inlet respectively). There are no coliform bacteria in the muscle of the fish. High bacterial load is an indication of biological pollution and these calls for restraint on the side of those who are using the lake as site for refuse dump.
    Description: Includes: 10 references.
    Keywords: Fisheries ; Pollution ; Nigeria ; Jabi Lake ; Jabi lake ; Water ; Fish ; Bacteria ; freshwater environment ; Microbiology ; Fish ; Pollution ; Water pollution ; Lake fisheries ; Fishery surveys ; Bacteria ; Baseline studies ; Water sampling ; Microbial contamination ; Muscles ; Freshwater fish ; Pollution surveys ; Water analysis ; Freshwater pollution
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    Association of Aeromonas hydrophila with mortality of catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24245 | 19325 | 2018-05-20 05:42:58 | 24245 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Aeromonas hydrophila was the predominant bacteria isolated from moribund fingerlings, post fingerlings, juveniles and table size of Catfish (Clarias gariepinus) cultured in concrete tanks. A. hydrophila was recovered from the internal organs of the fish showing varying degrees of clinical signs of dropsy, ulcers, fin rot and tail rot. The study considers the role of A.hydrophila, a pathogen of emerging importance and its presence in fish as a cause for concern for culturists, processors, consumers and exporters.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Port Harcourt ; brackishwater environment ; freshwater environment ; Pathogens ; Pathogenic bacteria ; Freshwater fish ; Fingerlings ; Fish culture ; Fish diseases ; Atmospheric physics
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    The comparative histological studies of the testis in the wild and cultured African catfish species (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24211 | 19325 | 2018-05-19 06:44:45 | 24211 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The comparative study of the structure of testes of both the cultured and wild Male Clarias species was carried out with the aim of highlighting the possible differences in the testicular structure between them. The data were analysed based on the Regression and Correlation Analysis to examine the relationship between and within the data using Microsoft Excel data analysis tool. The Samples of the testes were fixed in Bouin's fluid for 72 hours. The tissue samples were passed through graded concentrations of alcohol at 50%, 70%, 90%, and absolute alcohol (100%) in order to achieve dehydration. The tissues were cleared in two jars of xylene for one hour and then embedded after passing through the four changes of paraffin wax at 60~'C. Paraffin sections of 5. Micron thick were obtained on a microtome. These were mounted on clear albuminized slides after floating on a warm water bath and then dried in an oven and stained with Haematoxylin and Eosin (H & E). At the same time, some of the cut sections of the testes were stained with Periodic Acid Schiff (PAS) reagents. All the slides were examined under the light microscope. On the slides stained with H&E and PAS, the histological features of the testis were evaluated and the histomorphometry of the testes determined. The findings of this work showed that there was no histological difference in the testicular structure of both domestically reared and wild strains of Clarias gariepinus species. At the end of the experiment, this work showed that testicular structure of Clarias gariepinus in the cultured and the wild are histologically similar.
    Description: Includes: 12 references.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Ogun State ; Cultured ; Sexually gravid ; Histology ; Clarias gariepinus ; Testicule ; freshwater environment ; Freshwater fish ; Testes ; Males ; Comparative studies ; Histology ; Fish culture ; Stocks ; Cultured organisms
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    Preliminary studies on some physico-chemical parameters and fish species composition of Doma Dam, Nasarawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24638 | 19325 | 2018-05-24 09:36:38 | 24638 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study of some Physico-chemical parameters and fish species composition of Doma Darn was carried out between the month of August 2012. Fishing communities along the dam were selected at sampling stations and collection of fish species. The values of physico-parameters obtained for stations were in the range of 28.10-92 m for depth, 27.70-28.48~'for temperature, 7.03-7.64 for PH, 7.23-7.64mg/l for dissolved oxygen (DO), 30.08-31.75 ntu for turbidity, 94.64-105.17mg/l for alkalinity and 79.17-80.58mg/l for total hardness. The result indicated that there was significant difference (p〈0.5)for depth, temperature turbidity and alkalinity, while there was no significant difference (p〈0.05) for DO, pH and water hardness among the stations. The result of these parameters among the duration shows that there was significant different (p〈0.05) in all the parameters except pH. The study revealed that there were twenty-five (25) fish species belonging to 12 families in the dam. The family Cichlidae and Mochokidae and Bagridae which has three each, While the family, Polypteridae, Channidae, Centropomidae, flepsetidae and Protopteridae has the lowest number of one (1) each. The overall result revealed that the Phvsico-chemical parameters were mostly influenced by duration and not much by stations; and parametersoaram measured were within the recommended water quality requirement for growth and survival of aquatic organisms.
    Description: Includes: 10 references.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Doma Dam ; Doma Dam ; Fishing community ; Physico-chemical parameter ; Fish species ; freshwater environment ; automation
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  • 47
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    Growth and survival of African catfish (Clarias gariepinus, Burchell 1822): comparison on natural and artificial diet (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24164 | 19325 | 2018-05-13 13:17:21 | 24164 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The growth and survival of Clarias gariepinus larvae with an average length and weight of 6.0mm and 2.57mg respectively were fed commercial dry feed, decysted Artemia or copepods over a twelve day period. Larvae were hatched using the induced hormone technique. After endogenous feeding, 80 larvae were distributed into each of the nine tanks and fed ad libitum thrice a day. The highest growth rate and survival were observed in larva fed with decysted Artemia (p〈0.05). The present study showed that formulated diet may not be a suitable starter diet for Clarias gariepinus larvae.
    Description: Includes: 1 table.;Also includes: 16 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Adamawa State ; Clarias gariepinus ; Decysted Artemia ; Commercial diet ; Copepod ; Growth and survival ; freshwater environment ; Growth ; Survival ; Freshwater fish ; Artificial feeding ; Fish larvae ; Length-weight relationships ; Diets ; Fish culture
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    Supplementation of date palm (Phoenix dactylifera) seed as feed additive for improved performance of juvenile African catfish (Clarias gariepinus) (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24174 | 19325 | 2018-05-13 18:56:53 | 24174 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The present study examined the utilization potential of date palm seed (DPS) as feed additive in the diet of African catfish Clarias gariepinus for efficient feed utilization. A total of 150 African catfish (weight ranged from 81.13 to 91.35 g) were divided into five experimental groups. The experiment was conducted for 70 days. Experimental diets were identical in all composition except for the variation in DPS level. Non-inclusion of DPS was used at 0% (control) and other levels are 0.5% (diet 2), 1.0% (diet 3), 1.5% (diet 4) and 2.0% (diet 5). The growth performance and nutrient utilization of African catfish including Weight Gain (WG), Specific Growth Rate (SGR), Protein Efficiency Ratio (PER) and Protein Productive Value (PPV) were significantly (p〈0.05) higher than those of fish fed control diets, where DPS supplementation at 1.5% appears to be generally higher than other levels. In the same trend fish fed diets with DPS supplementation produced improved fish carcass values and the haematology of fish was generally better from diets in all DPS fed fish. Overall production performance and subsequent fish quality assessments indicated that the diets containing 1.5% DPS level recorded the best performance in African catfish compared to other levels including the control diet. Based on the result of the present study, it is concluded that date palm seed supplementation positively influenced growth performance and feed utilization of African catfish as well as ensuring their healthy status.
    Description: Includes: 3 tables.;Also includes: 20 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; freshwater environment ; Feed ; Additives ; Utilization ; Freshwater fish ; Juveniles ; Diets ; Feeding experiments ; Fish culture ; Feed efficiency
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    Assemblages of fish species of Ikpa River in Akwa Ibom State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24182 | 19325 | 2018-05-13 19:11:34 | 24182 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species were investigated for 12 calendar months from March 2009 - February 2010 forthnightly using traps, gillnets and cast nets from three sampling stations in Ikpa River. Ornamental fish species were sorted out from the pooled samples. The findings revealed that out of the 2307 fish specimens sampled, 1074 specimens made up of 38 species and 19 families were of indigenous ornamental fish. The highest contributing family in terms of number of species is Cichlidae (10 species) whereas Schilbeidae (593 specimens; 55.21%) is the highest contributor in terms of total number of specimens sampled. This is followed by Mochokidae and Mormyridae with 4 species each and Cichlidae with 158 specimens (14.70%). At the species level, the highest contributor is Physalia pellueida (577 specimens;53.72%)and is followed by Erpetoichthys calabarcus (60 specimens; 5.59%). The least contributors were Heterobranchus bidorsalis, periophthalmus barbarus and Pelyicachromis pulcher (1 specimen; 0.09%). Twelve families recorded only one species each. These great potentials of ornamental fish have been left unexploited and hence, undeveloped. Several species of ornamental fish have been imported into and exported from Nigeria by businessmen. This paper therefore highlights the constraints and also make recommendations for the exploitation and development of ornamental fishery in Akwa Ibom State and its environs.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Fisheries ; Nigeria ; Ikpa R. ; Exotic ; Ornamental ; Indigenous ; Fish species ; Ikpa River ; freshwater environment ; Lake fisheries ; Ecological associations ; Artisanal fishing ; Taxonomy ; Ornamental fish ; Exploitation ; Fish ; Stock assessment ; Potential resources ; Fishery development ; Fishery surveys ; Freshwater fish ; Check lists
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    Effects of chicken manure to fingerlings of Nile tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24210 | 19325 | 2018-05-19 06:43:04 | 24210 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of acute toxicity of chicken droppings to fingerlings of Oreochromis niloticus was determined under laboratory conditions using static bioassay for a period of 96 hours. The 96-hrs LC50 was estimated to be 2.19 with upper and lower confident limits of 3.24 and 1.48g/l. Water quality examination revealed a reduction in the level of dissolved oxygen, increase in alkalinity and free carbon dioxide with increase in concentrations of the fertilizer while there were no significant different (P〉0.05) in the ievels of pH and temperature when compared with the control. Fish exposed to higher concentrations of the organic fertilizer became darker in colour with mucous secretion, exhibited erratic swimming and showed signs of respiratory distress before death. Methods and standard doses for subsequent organic fertilizer application in fish ponds for survival and growth are discussed.
    Description: Includes: 2 tables.;Also includes: 24 references.
    Keywords: Pollution ; Aquaculture ; Oreochromis niloticus ; Nigeria ; Abuja ; Organic fertilizer ; Acute toxicity ; Oreochromis niloticus ; Water quality ; freshwater environment ; Manure ; Organic fertilizers ; Fingerlings ; Freshwater fish ; Toxicity ; Water quality ; Inspection ; Dissolved oxygen ; Alkalinity ; Carbon dioxide ; Fish ponds ; Survival ; Growth ; Pollution effects ; Bioassays ; Controlled conditions ; Lethal limits ; Fish culture
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    Heavy metal content of sole, Solea solea and croaker, Pseudotolithus typus from Lagos and Delta State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24227 | 19325 | 2018-05-19 07:16:39 | 24227 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigated the levels of lead (Pb), cadmium (Cd), Copper (Cu), Chromium (Cr) and Zinc (Zn) in two common edible fish species, Sole, Solea solea and Croaker, Pseudotolithus typus from Makoko and Koko in Lagos and Delta states respectively. Heavy metal contents were determined by air-acetylene flame Atomic Absorption Spectrophotometer after wet digestion of dried and milled samples with 1:1 HN0〈sub〉3〈/sub〉: H〈sub〉2〈/sub〉O〈sub〉2〈/sub〉. Results obtained (~kg/g, dry weight) for Sole in Lagos and Delta states were: Pb (0.330 and 0.149), Cd (0.097 and 0.063), Cu (0.869 and 0.434), Cr (1.184 and 0.826), Zn (7.612 and 7.890); and Croaker: Pb (0.163 and 0.045), Cd (0.115 and 0.029), Cu (0.990 and 0.694), Cr (1.008 and 1.038) and Zn (6.756 and 6.168) for the wet season (April-October); and Pb (0.534 and 0.527), Cd (0.373 and 0.410), Cu (0.437 and 0.556), Cr (0.834 and 0.983), Zn (6.764 and 9.343) for sole and Pb (0.210 and 0.213), Cd (0.264 and 0.307), Cu (0.442 and 0.483), Cr (0.577 and 0.597) and Zn (4.783 and 5.924) for croaker in the wet season (July-October). Significant (P~B 0.05) variations were observed in metal content between fish in terms of species, location and season. Generally, sole had higher metal concentrations than croaker; and metal contents were higher in samples from Lagos compared to Delta, probably due to the contribution of more effluents from industrial, commercial and municipal wastes in Lagos state. Cd and Cr levels in the test species were found to exceed international standards. It is recommended that a programme of continuous monitoring and control of the physical and chemical characteristics of components and food products of Nigeria's coastal zone be incorporated as a management tool for this important ecological zone.
    Description: Includes: 20 references.
    Keywords: Fisheries ; Pollution ; Solea solea ; Pseudotolithus typus ; ASE ; Nigeria ; Lagos Lagoon ; ASE ; Nigeria ; Delta ; freshwater environment ; Heavy metals ; Comparative studies ; Seasonal variations ; Flatfish fisheries ; Effluents ; Pollutants ; Environmental monitoring ; Pollution control ; Pollution effects ; Pollution monitoring ; Freshwater fish ; Industrial wastes ; Freshwater pollution ; Lead ; Cadmium ; Copper ; Chromium ; Zinc ; Bioaccumulation ; Food fish
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    Histopathological and haematological effects of acute toxicity of cypermethrin on Clarias gariepinus juvenile (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24233 | 19325 | 2018-05-19 07:27:47 | 24233 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The experiment was conducted to evaluate the acute toxic of cypermethrin, a synthetic pyrethroids on juveniles of Clarias gariepinus. The effect was assessed based on the comparism results of haematology and histopathological tissues examinations of control and experimental group exposed to five nominal concentration of cypavest, 10EC Pesticide Preparation (active substance 100mg/l) of cypermethrin in a static non-renewal bioassay for 96 hours. The 96hrs LC50 value of the exposed juveniles was found to be 0.062 mg/1. Fish exhibited progressive loss of balance, respiratory distress, erratic movement and death. Examination of haematology significantly showed higher value (P〈0.001; 0.01) of white blood cell (WBC), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), packed cell volume (PCV), monophilis and heterophilis; a significant reduction (P〈0.001, 0.01) in Red Blood Cell (RBC) and Lymphocyte was obtained as compared to the control. Severe necrosis, haemorrhages vacuolation, congestion and focal interstitial haemorrhages were the stopathological changes in the tissues of gill and liver, thus concluding that cypermethrin is toxic to juveniles of Clarias gariepinus.
    Description: Includes: 17 references.
    Keywords: Pollution ; Aquaculture ; Clarias gariepinus ; Nigeria ; Borno State ; Cypermethrin ; cypavest ; Synthetic pyrethroid ; Static-non renewal ; bioassay ; freshwater environment ; Histopathology ; Haematology ; Toxicity ; Freshwater fish ; Juveniles ; Pollution effects ; Evaluation ; Comparative studies ; Experimental research ; Bioassays ; Toxicants ; Pesticides
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    Growth enhancement potential of Mucuna pruriens utilis on the Nile tilapia, Oreochromis niloticus (L.) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24238 | 19325 | 2018-05-20 05:25:21 | 24238 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The growth enhancement potential of Mucuna pruriens utilis on the Nile Tilapia, Oreochromis niloticus (L.), was investigated in eight weeks feeding trials in concrete tanks at the African Regional Aquaculture Centre, Aluu. Three isonitrogenous diets were fed to three sets of fingerlings of the fish with full fat soya bean diet(D1) serving as the Control. The initial average fish weight was 1.45 ~c 0.12 and the final average fish weight was 5.67 ~c 1.46. Crude protein, ash and nitrogen free extract of the carcasses were significantly different (P〉0.05) from the control specimens. The average weight gains were 3.85g, 3.54g and 3.42g for fish fed 'full fat' Soya bean based diet(Control), fermented Mucuna seed diet(D2) and unfermented Mucuna seed diets (D3) respectively. Average apparent food consumed was in the order D2 〉D1 〉 D3. Fish fed fermented Mucuna seed diet (D2) had the highest food conversion ratio of 1.51 followed by fish fed with the control diet (D1) 1.22 and fish fed unfermented Mucuna seed diets (D3) 1.19. Unfermented Mucuna seed diet had the highest food conversion efficiency (0.84) followed by full fat Soya bean based diet(Control) 0.82 and the least was the fermented Mucuna seed diet (0.66). The results of this study indicate that unfermented Mucuna diet can conveniently replace Soya bean based diet without significantly affecting growth.
    Keywords: Aquaculture ; Ecology ; Oreochromis niloticus ; Nigeria ; Port Harcourt ; Feeding potentials ; Processing ; Concrete tanks ; Weight gained ; freshwater environment ; Freshwater fish ; Growth ; Feeding experiments ; Food conversion ; Fish culture ; Fingerlings ; Culture tanks ; Diets ; Body weight
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    Prevalence of Eustrongylides ignotus in Poecilia reticulata obtained from some waste water drains of Lagos State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24241 | 19325 | 2018-05-20 05:34:34 | 24241 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Poecilia reticulata is a common ornamental tropical fish found in many wastewater drains in Nigeria. Guppies feed on Oligochaetes which are intermediate hosts of Eustrongylides ignotus which is a parasite of Clarias gariepinus. The potential ban on the importation of ornamental fishes into Nigeria due to dearth of information on the parasite fauna of ornamental fishes has enhanced the demand for local species, usually sourced from the wild. Sampling was done monthly using a 2mm mesh-sized scoop net along selected drains at Igi-Olugbin Street, Basil Ogamba Street, Ahmadu Bello Road and Adenaike Alagbe Street between March, 2004 and February, 2005. The selected drains were abutting residences and varying industrial activities in each of four different local government areas of Lagos State. 60 female and 60 male samples were randomly selected from each drain for dissection and microscopy. Nematodes observed were identified using standard identification guides. Prevalence was determined as percentage infection in guppies examined. Measurements of waste water temperature, Dissolved Oxygen (DO), pH and transparency were done according to APHA methods. Drain depth was determined using a calibrated pole. Data was analyzed using chi-square test, ANOVA and Pearson correlation coefficient. Out of 4,320 samples examined, only 156 were infected. There was no sex-related difference in the prevalence of E. ignotus and no significant difference in mean monthly pH and DO across drains. The highest prevalence of 12.0% was observed in P. reticlliata males obtained from Adenaike Alagbe Street in June, 2004. Mean monthly physicochemical parameters for drains were: temperature, 25.0 ~c1.1 - 26.0 ~c 1.1~'C; DO, 7.8 ~c 2.1 - 8.4 ~c 1.8mg1-1 ; pH, 6.9 ~c 0.5 - 7.3 ~c 0.4; transparency, 3.5 ~c 0.8 - 23.0 ~c 3.6 cm and drain depth, 9.6 ~c 2.3 - 14.8 ~c 3.2 cm. The prevalence of E. ignotus in the P. reticulata obtained from the selected Streets should not prevent their exploitation for both import substitution and the export market because it is low.
    Description: Includes: 6 references.
    Keywords: Aquaculture ; Ecology ; Poecilia reticulata ; Clarias gariepinus ; Eustrongylides ignotus ; Nigeria ; Lagos State ; freshwater environment ; Freshwater fish ; Parasites ; Hosts ; Physicochemical properties ; Species ; Pollution ; Ornamental fish ; Food organisms
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    Microbiological quality of fresh tilapia raised in ponds fertilized with raw and sterilized cow dung manures (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24222 | 19325 | 2018-05-19 07:06:04 | 24222 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A total of 2,800 tilapia (Oreochromis niloticus) were stocked in seven duplicates 5 by 4 m2 earthen ponds in NIFFR Integrated Farm, New-Bussa, Niger-State. Raw and sterilized poultry manure of 0.13 to 0.52 kg/m3 concentrations were used to fertilize the ponds with the unfertilized ponds serving as control. The following bacteria were isolated from the cow dung manure; Escherichia coli, E. co1iOl57:H7, Aeromonas hydrophila,Salmonella typhi, Shigella dysenteriae and Staphylococcus aureus. The fish samples from the 0.13 and 0.26 kg/m3 sterilized manure fertilized ponds had zero count in the muscles while samples from other ponds had pathogens in their fish muscles. The study revealed that fish samples from sterilized manures were better in terms of microbial safety for fish productions hence sterilized manure are recommended for use in fish production to ensure the microbial safety of the fish, handlers and that of the consumers.
    Description: includes: 13 references.
    Keywords: Aquaculture ; Oreochromis niloticus ; Escherichia coli ; Aeromonas hydrophila ; Samonela typhi ; Shigella dysenteriae ; Staphylococcus aureus ; Nigeria ; Niger State ; Catfish ; Pathogens ; Microbial quality ; Raw and sterilized manue ; freshwater environment ; Bacteria ; Freshwater fish ; Fish culture ; Fish ponds ; Manure ; Microorganisms ; Freshwater aquaculture ; Aquaculture products ; Food fish ; Quality assurance ; Muscles ; Microbial contamination
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    Comparative growth response of African catfish, Clarias gariepinus fingerlings fed with imported and local feeds (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24153 | 19325 | 2018-05-12 14:51:36 | 24153 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The comparative growth response of African catfish fingerlings (Clarias gariepinus) fed with three (3) local and three (3) imported feeds was studied in the Department of Biological Sciences, Ahmadu Bello University, Zaria between September and October, 2009 with the aim of establishing the best quality feed in terms of specific growth rate, total weight and percentage survival rate for a period of 8 weeks (56 days). One hundred and twenty (120) fingerlings of Clarias gariepinus and six commercial feeds with varying crude proteins namely Chivita, Aquaplus, Vital, Skrettings, Multifeeds and Coppens were used for the experiment. Some water quality parameters analyzed indicated temperature varied from 25.50 ~'C to 28.0 ~'C while pH and dissolved oxygen ranged from 6.6 to 7.2 and 6.3mg/l to 8.2mg/l respectively. The treatment shows significant difference in terms of mean weight gain, specific growth rates and survival rate. The lowest SGR was 0.31 and 0.89 the highest. Fish fed with Chivita and Coppens showed the best growth compared to other treatments.
    Description: Includes: 3 tables.;Also includes: 14 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Katsina State ; African catfish ; Local feeds ; Imported feeds. ; freshwater environment ; Freshwater fish ; Feeding experiments ; Growth rate ; Fingerlings ; Feed ; Survival ; Fish culture ; Proteins ; Water quality ; Comparative studies
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    Comparative studies of the growth performance of Clarias gariepinus fingerlings fed commercial feedstuff and live zooplankton (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24154 | 19325 | 2018-05-12 14:54:51 | 24154 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study on the growth performance of Clarias gariepinus fingerlings fed separately on zooplankton, coppens, aquaculture feed and a combination of Coppens and zooplankton lasted for 8 weeks. Ninety (90) three-week old Hatchery bred fingerlings of Clarias gariepinus used for the study were acclimated for three (3) days in a concrete tank measuring 1m x 1m and fed with fish meal, before commencement of the experiment. The fingerlings were grouped in tens into 9 concrete tanks measuring 1m x 1m x 1m. These tanks were further grouped into threes to give three treatments labelled A〈sub〉1〈/sub〉 - A〈sub〉3〈/sub〉, B〈sub〉1〈/sub〉 - B〈sub〉3〈/sub〉 and C〈sub〉1〈/sub〉 - C〈sub〉3〈/sub〉. Treatment I (A〈sub〉1〈/sub〉 - A〈sub〉3〈/sub〉) were fed with zooplankton, Treatment II (B〈sub〉1〈/sub〉 - B〈sub〉3〈/sub〉) were fed zooplankton and 3% body weight of coppens, while Treatment III (C〈sub〉1〈/sub〉 - C〈sub〉3〈/sub〉) was fed with 5% body weight of coppens only. Zooplanktons used were mainly rotifers, branchionus and Cyclops. Total length and weight of fish were measured weekly and used as growth indices. Data collected were analyzed using one way Analysis of variance and means separated by Duncan's Multiple Range Test. Results from the study revealed that Treatments II and III were not significantly different from each other (P〉0.05) for both length and weight, but were different from Treatment I (P〈0.05). Based on the result, Treatment II is preferred and is recommended, for use, as zooplankton feed supplement helps to reduce cost of production and still ensure optimal production.
    Description: Includes: 5 tables.;Also includes: 7 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Delta State ; Zooplankton ; Coopens ; Clarias gariepinus ; freshwater environment ; Growth rate ; Freshwater fish ; Feeding ; Artificial feeding ; Fingerlings ; Zooplankton ; Fish culture ; Food organisms
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 14-15
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  • 58
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    The effects of animal protein on the feeding rate of tilapia (Oreochromis niloticus) in concrete tank (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24161 | 19325 | 2018-05-13 13:12:24 | 24161 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: An experiment was carried out to determine the effect of blood and fish meal based diets on the feeding rate of tilapia in concrete tank. Two diets formulated at 35% CP, with blood and fish meal as the test ingredients. The diets were fed to tilapia (25/tank, with average initial weight of 7.61g) at 1, 1.5 and 2.5% biomass, in three replicates, once daily, in a 2:3 factorial design. Result showed that under blood meal based diet, average weight gain, gain in total length, relative weight gain and specific growth rate increased from 1 to 1.5% biomass and reduced at 2.5% ( 10.61, 16.75, 14.51g; 1.84, 3.18, 2.86cm; 147.37, 238.42, 147.42%; and 0.61, 0.85, 0.64 %/day), respectively (p〈0.05). Under fish meal based diet, the same parameters increased as feeding rate increased from 1 to 2.5% biomass ( 8.25, 16.55, 29.09g; 2.38, 2.67, 4.35cm; 125.07, 213.79, 408.63% and 0.52,0.82, 1.10%/day), respectively, (p〈0.05). In conclusion, blood meal based diet at 35%CP requires a feeding rate of 1.5% biomass, while fish meal based diet requires at least 2.5% for tilapia production in concrete tanks.
    Description: Includes: 3 tables.;Also includes: 14 references.
    Keywords: Aquaculture ; Ecology ; Oreochromis niloticus ; Nigeria ; Port Harcourt ; comparative effect ; Blood meal ; Fish meal ; Diets ; Growth performance ; freshwater environment ; Proteins ; Feeding experiments ; Freshwater fish ; Fish meal ; Feed ; Diets ; Fish culture ; Culture tanks ; Feed efficiency ; Comparative studies
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 41-44
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