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  • 1
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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
    Publikationsdatum: 2021-07-15
    Beschreibung: 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.
    Beschreibung: Includes: 1 table and 4 figure.;Also include: 7 references.
    Schlagwort(e): 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
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 102-105
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  • 2
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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
    Publikationsdatum: 2021-07-15
    Beschreibung: 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.
    Beschreibung: Includes: 13 references.
    Schlagwort(e): 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
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 240-242
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  • 3
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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
    Publikationsdatum: 2021-07-15
    Beschreibung: 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.
    Beschreibung: Includes: 1 table and 7 plates.;Also includes: 8 references.
    Schlagwort(e): 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
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 200-202
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  • 4
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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
    Publikationsdatum: 2021-07-15
    Beschreibung: 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.
    Beschreibung: Includes: 12 references.
    Schlagwort(e): 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
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 361-363
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    ARTIKEL (OA)
  • 5
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    Gender and age blood parameters references in African catfish (Clarias gariepinus) cultured in earthen ponds during dry season in Ibadan metropolis, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24580 | 19325 | 2018-05-20 06:01:18 | 24580 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-15
    Beschreibung: Blood analysis is important in fish health investigation and may be influenced by intrinsic and extrinsic factors. However difficulties exist in the use of blood analysis in the investigation of fish health due to the paucity of species specific, gender and age based reliable references. The current study therefore aims to determine some blood parameters in order to provide reliable references for dry season of the normal condition values of C. gariepinus, a widely cultured fish in Nigeria. This study involved random sampling of 900 C. gariepinus aged 4, 5 and 6 months from earthen pond for three years. Data obtained for blood parameters using standard method were analyzed using descriptive statistic, students'-test, one-way ANOVA level of significant set at p ~,0.05. Results showed the female had significantly (p ~,0.001) higher values than the males for each age bracket and the values increased sig nificantly (p 0~,.05) with increased in PCV. hemoglobin, RBC, WBC, total protein, potassium, sodium, Creatinine, ALT, AST and glucose. The females and males values at 4, 5 and 6 months old were PCV (32.14 ~c 0.19% vs 26.72 ~c 1.l2; 36.45 ~c 1.39% vs 32.33 ~c 1.46%; 40.83 ~c 0. 73% vs 35.01 ~c 0.08%.), total protein (3.98 ~c 0.16g/l vs 3.49 ~c 0.18g/l; 4.45 ~c 0.10g/l vs 4.33 ~c 0.04g/l). Lymphocytes, neutrophils, mono cytes and ESR values showed no stable trend in gender differences with increased age. In both the females and the males, lymphocytes decreased significantly (p ~,0.05) while neutrophils and monocytes increased significantly (p~,0.05) with increased age. ESR decreased significantly (P~, 0.05) in the males and non-significantly in the females with increase in age. It is hoped that these values obtained would serve as a reliable reference to enhance an appropriate intervention in the culture of C. gariepinus aged 4. 5 and 6 months in earthen pond which may be extrapolated for use in other culture systems.
    Beschreibung: Includes: 48 references.
    Schlagwort(e): Aquaculture ; Clarias gariepinus ; Nigeria ; Clarias gariepinus ; Gender ; Blood parameters ; Earthen pond ; Culture ; freshwater environment ; automation
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 56-64
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  • 6
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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
    Publikationsdatum: 2021-07-15
    Beschreibung: 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.
    Beschreibung: Includes: 10 references.
    Schlagwort(e): Aquaculture ; Chemistry ; Nigeria ; Physico-chemical parameter ; Fish pond ; Ado-Ekiti ; Fish production ; freshwater environment ; automation
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 97-100
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  • 7
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    Prevalence of parasites in the gut lumen of farmed catfish Clarias gariepinus in Lagos and Ogun States (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24595 | 19325 | 2018-05-20 16:10:53 | 24595 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-15
    Beschreibung: A cross-sectional study was conducted in four (4) different production systems in Lagos and Ogun States of South Western Nigeria beetween December,2012 and May 2013 to determine the effect of Culture systems and management practices on prevalence of parasites in the gut of farmed catfish (Clarias gariepinus). Information on pond type, water source, feeding practices and general pond management were also gathered through administration of fish disease sample collection from Water for the examination of physicochemical parameters, was collected from 40 fish ponds comprising earthen, concrete, water recirculatory and poorly managed systems across the two (2) States. Temperature, pH and ammonia were monitored using the recommended range by FAO as standard. Also 160 live farmed catfish, 80 from each state, 20 from five different ponds of each system with a minimum of 4 live fish per system was collected, dissected and examined under the microscope for parasite load of the gut of C. gariepinus. The earthen, concrete and water recirculatory systems had good management practices compared to the poorly managed systems. The observed water physicochemical parameters in ponds with good management were within normal range. Five groups of parasites were observed; Protozoa (Eimeria spp), Cestodes (Bothriocephalus spp., Diphyllodium spp), Monogea (Enterogyrus spp), and copepods (Argasilus spp) and Nematodes (Procamallanus spp). Analysis of variance between location and System showed level of no significance (p〈 0.05). The interaction effect of location (State) and production system on parasite load of C. gariepinus also was not significant (p〉0.05). However interaction hetween Ogun and poorly managed system has the highest number of parasites (11.5), followed by Lagos (7.0). The systems with good management practice had low number of parasites with water recirculatory system recording the least number of parasites (0.5). Analysis of association between temperature, ammonia, and pH in all the cultured systems showed a significant level of correlation (p〈0.05). In this study, poorly managed systems especially where farmed fish received water directly from rivers and streams predispose fish to parasite infection of the gut. Good water quality management and proper fish husbandry techniques will eliminate most parasitic infection and improve on fish production.
    Beschreibung: Includes: 11 references.
    Schlagwort(e): Aquaculture ; Clarias gariepinus ; Nigeria ; Parasite ; Water recirculatory system ; C. gariepinus ; freshwater environment ; automation
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 114-118
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  • 8
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    Effect of feeding frequency on growth and survival rate of Clarias gariepinus fingerlings reared in plastic bowls (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24586 | 19325 | 2018-05-20 16:00:00 | 24586 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-15
    Beschreibung: The effects of feeding frequency on feed intake, growth and survival rates were determined in C. gariepinus. Twenty fish per tank (bowl) were stocked in triplicate. They were fed once (1D), thrice (3D) and five times daily (5D) respectively. The 5D group growth rates were observed significantly different (P〈 0.05) from fish fed on 1 (1D) and (3D) feeding frequency. All the treatments containing 1D, 3D and 5D were observed to have significant difference (P〉 0.05) in terms of final weight (FW). There was also a noticeable increased trend in final weight (5D 〉 3D 〉 7D). Feed conversion ratio (FCR) of 3D and 5D treatments were higher than 1 D) treatment (P〈 0.05). According to the results, feeding C. gariepinus 1 time daily (1D) did not influence the growth; however, 5 times daily reduced mortality and improved the feed conversion ratio (FCR) of C. gariepinus.
    Beschreibung: Includes: 9 references〉
    Schlagwort(e): Aquaculture ; Clarias gariepinus ; Nigeria ; Feeding frequency ; Feed convertion ratio ; Growth ; Survival rate ; freshwater environment ; automation
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 84-86
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  • 9
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    Efficiency of different traps for silver catfish fishery and its aquaculture implications in the face of climate change (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24601 | 19325 | 2018-05-21 12:17:22 | 24601 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-15
    Beschreibung: Climate change has the potential to severely impact coastal and inland environments and ecosystems, and by extension fisheries and aquaculture. Coastal regions of the world are already experiencing flooding due to rise in sea level. In recent times, salinization of coastal areas due to flooding from storm surges and high tidal influence has been observed. Aquaculture is a fast growing agri-business venture in Nigeria presently and many coastal communities derive their livelihood from it. The culture of freshwater fish species that are very sensitive to high salinity may be threatened leading to mortality of stocked fish and loss of livelihood for coastal population. Consequently, there is urgent need for development and domestication of the Silver catfish, Chrysichthys nigrodigitatus that can tolerate higher salinity more than Mudcatfish (Clarias gariepinus). This will help mitigate the impact of salinization of coastal areas arising from sea water flooding on culture of fresh water fish species.
    Beschreibung: Includes: 17 references.
    Schlagwort(e): Aquaculture ; Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Clarias gariepinus ; Nigeria ; Climate change ; Silver catfish ; Chrysichthys nigrodigitatus ; freshwater environment ; automation
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 137-139
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  • 10
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    Effect of sublethal concentrations of formalin on the growth of Clarias gariepinus fingerlings (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24611 | 19325 | 2018-05-22 05:58:34 | 24611 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-15
    Beschreibung: Fingerlings of Ciarias gariepinus were exposed to various sublethal concentrations (10.0, 20.0, 30.0. 40.0, 50.0 and 60.0 ~KL/L) formalin and the concentration of 0.0 ~KL/L formalin served as the control. The toxicant led to depressed weight gain in the fish. Severity of this depression was directly proportional to the toxicant concentrations. However, there was no difference (p〉0.05) in weight gain in test fish of various concentrations. Restlessness, loss of balance, erratic swimming behavior, respiratory distress, vertical movement and death, were observed in test media especially in the concentrations 60.0 and 50.0~Kl/L of formalin. Such observation were not recorded in the control tanks.
    Beschreibung: Includes: 9 references.
    Schlagwort(e): Aquaculture ; Pollution ; Clarias gariepinus ; Nigeria ; Clarias gariepinus ; Formalin ; Concentration ; freshwater environment ; automation
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 176-178
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