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  • 1
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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
    Repository Name: AquaDocs
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  • 2
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    Design and construction of microcontroller-based automatic fish feeding device (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24068 | 19325 | 2018-05-10 10:17:48 | 24068 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper presents the design, construction and demonstration of an automatic fish feeder. It is a microcontroller-based system. This system is designed to dispense a predetermined amount of fish feed into an aquarium at a particular time each day. The device consists of a cylindrical can, distributing tubes and a stand. The dispensing of food is controlled by the use of a stepper motor, which is situated under the canister. A timer controlled switch is used to control the time at which the motor rotates, by a program burned into the microcontroller. The fish feeder was successfully fabricated and tested. It dispenses food automatically at set preset times. It is expected that this device will enhance the fish farming efforts of the local farmers, especially the armature farmers who combine fish farming with other businesses.
    Description: Includes: 4 figs.;Also includes: 9 refs.
    Keywords: Aquaculture ; Engineering ; Nigeria ; freshwater environment ; Aquaria ; Fish culture ; Feeding equipment ; Design
    Repository Name: AquaDocs
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    Format: 11-15
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  • 3
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    Aquaculture and the environment (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24072 | 19325 | 2018-05-12 13:54:51 | 24072 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Aquaculture industry in the last five decades has grown at an unprecedented rate (Average growth of 3.2 percent per year) stimulated by the increased demand for fish and fishery products as global population awareness of fish as a health food increased and the population from capture fisheries becomes almost static. In the light of the noticeable expansion, this review paper focuses on the deleterious effect of many aquaculture practices which includes; degradation of terrestrial environments, pollution from chemical as well as waste and nutrient loading, diseases to mention but a few. Measures are proffered to reduce the negative impact of Aquaculture on the environment. The efforts of the National Environmental Standards and Regulation Enforcement Agencies (NESREA) as it concerns EIA should be broadened to ensure that small aquaculture ventures along the coastline and within inland water bodies be considered to avoid environmental hazards.
    Description: Includes: 2 tables;Also includes: 32 refs.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Aquaculture ; Environment ; Poverty ; EIA ; Food security ; freshwater environment ; Aquaculture ; Aquaculture systems ; Environmental degradation ; Chemical pollution ; Wastes ; Environmental effects ; Environmental legislation ; Environmental assessment ; Food security ; Pollution effects
    Repository Name: AquaDocs
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    Format: 39-47
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  • 4
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    Aflatoxin levels in fish feeds in Abeokuta, Ogun State (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24071 | 19325 | 2018-05-12 13:53:17 | 24071 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Post harvest contamination can occur if drying of feed is delayed and when water is allowed to exceed critical values for mould to grow during storage. This study examined the aflatoxin levels in fish feeds surveyed in Abeokuta, Ogun State, Nigeria. Fifteen (15) fish farms were randomly selected for assessment of the aflatoxin levels in fish feeds in Abeokuta. After the estimation of the aflatoxin levels using Veratox quantitative aflatoxin test, the Aflatoxin concentrations in the samples ranged between 0-49 ppb with a mean value of 6.89 ppb. Results obtained from this study showed that aflatoxins were found to be associated with fish feeds in different fish farms in Abeokuta, but, a very high proportion of the feed samples were below the regulatory levels (maximum of 20 ppb) that may not be toxic to the health of the fish according to the regulatory levels for aflatoxins issued by the Food and Administration of the United States. Thus, feeds fed to the cultured fish species in farms in Abeokuta were fit for consumption, with very little or no threat of aflatoxicosis (a disease that can affect many species of fish, when feed contaminated with aflatoxin is consumed).
    Description: Includes: 1 table and 1 figure;Also includes: 13 refs.
    Keywords: Aquaculture ; Conservation ; Nigeria ; Fsh feeds ; Aflotoxin ; Aflotoxicosis ; Aspergillus species ; Aflotoxin in fish feeds ; freshwater environment ; Feed ; Pollution ; Storage ; Storage effects ; Biological poisons ; Fish
    Repository Name: AquaDocs
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    Format: 35-38
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  • 5
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    Assessment of the adoption of aquaculture technologies in Niger State, North Central Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24075 | 19325 | 2018-05-12 14:01:24 | 24075 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A total of 115 respondents were examined through purposive and cross sectional approach using questionnaire in nine Local Government Areas of the state. About 58% of the respondents were small scale fish farmers with annual income from fish farming being in a range of N151,00O0 to N200,000 per annum. Majority of the respondents fell within the age of 31-50 years, civil servants by occupation and mostly having tertiary education. The respondents generally had positive attitude to fish farming with comparatively high rate of awareness in relation to adoption of 14 aquaculture practices under investigation in this study. Inadequate extension education, water scarcity and costly and unaffordable fish feeds were observed as major threats to fish farming in the study area.
    Description: Includes: 4 tables;Also includes: 12 refs.
    Keywords: Aquaculture ; Management ; Aquaculture ; Technologies ; Fish farmers ; Awareness ; Adoption ; Civil servants ; freshwater environment ; Aquaculture ; Extension activities ; Technology transfer ; Fishery economics ; Economic benefits ; Aquaculture economics
    Repository Name: AquaDocs
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    Format: 59-66
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  • 6
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    Exploitable socio-economic benefits of mangrove oyster culture to the people of Niger Delta (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24077 | 19325 | 2018-05-12 14:05:45 | 24077 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Niger Delta, a 30,000 km2 wetland of global ecological significance is located at the southernmost part of Nigeria. The Delta is dissected by a dense network of rivers and creeks of saline and freshwater surface bodies. The brackish water (saline) sector consists of estuaries and intertidal mangrove swamps; the total brackish water area for the Niger Delta estimated at about 7,415 km2. The mangrove oysters grow chiefly in brackish water creeks of Bayelsa, Delta and Rivers States, found attached to the aerial roots of the mangrove Rhizophora racemosa (Red mangrove). Mangroves are salt-tolerant evergreen forests found along sheltered coastlines, shallow-water lagoons, estuaries, rivers or deltas; stands stretching 30-40 km inland with an estimated area of 997, 700 ha in Nigeria. Aquaculture has an important role in the development of many national economies and plays a key role in rural development. The abundance of a natural population of mangrove oysters in the Niger Delta makes seed collectors and growing easier and inexpensive. The culture of mangrove oysters by the locals will contribute significantly to economic growth, increases income and food security, efficient utilization of surplus rural labour and reduced social problems, poverty alleviation, and social stability. This paper enumerates the culture and socio-economic benefits derivable from the practice of aquaculture through the sustainable culture of the native mangrove oysters.
    Description: Includes: 2 figures;Also includes: 10 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Niger Delta ; Crassostrea gasar ; Mangrove swamp ; Communities ; Household income ; Oyster culture Filter feeding ; brackishwater environment ; Oyster culture ; Economic benefits ; Exploitation ; Mangrove swamps ; Population number ; Food security ; Utilization ; Socioeconomic aspects ; Sustainable fishing ; Shellfish culture
    Repository Name: AquaDocs
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    Format: 75-78
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  • 7
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    Comparative assessment of fermented maize broth and cassava waste water on the growth performance of catfish (Clarias gariepinus) fry (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24078 | 19325 | 2018-05-12 14:08:28 | 24078 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to evaluate and compare the growth performance of catfish fry on fermented maize broth and cassava waste water. Four day old fry (weight range 0.002 - 0.003g) of C. gariepinus were acclimatized in 10 litres glass tank of water for 5 days in Aquaculture Department of Nigerian Institute for Oceanography and Marine Research, Victoria Island, Lagos. Shell free artemia was mixed with Fermented Maize Both (FMB), Fermented Cassava Waste water (FWC) and bore hole water (control) respectively. The artemia mixtures were allowed to air-dry before administration. The treatments were produced in triplicates, feeding, ad-libitium for 30 days. The fry were fed with the treated shell free artemia and weighed every 6 days. The results revealed that fry fed fermented cassava waste water [FCW] diet showed highest mean weight, daily growth rate [DGR], survival rate and specific growth rate [SGR] and lowest food conversion ratio (FCR). This was followed by fermented maize broth while fish fed artemia mixed with borehole water-had the least growth. The results suggest that addition of fermented cassava waste water to shell free artemia can enhance fish growth in catfish hatchery production.
    Description: Includes: 1 table and 1 figure;Also includes: 13 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Lagos ; Growth performance ; Fermented cassava waste water (FCW) ; Maize broth (FMB) ; freshwater environment ; Feeding experiments ; Fish culture ; Growth rate ; Fish ; Fry ; Feed ; Nutrients (mineral) ; Waste water ; Comparative studies ; Fermentation ; Length-weight relationships
    Repository Name: AquaDocs
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    Format: 79-83
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  • 8
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    Growth performance and feed utilization of Clarias gariepinus (Teugels) fed different dietary levels of soaked Bauhinia monandra (Kutz) seed meal (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24076 | 19325 | 2018-05-12 14:04:20 | 24076 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to evaluate the suitability of soaked Bauhinia monandra (Kutz) seed as alternative protein source for Clarias gariepinus and to determine cost of feed compounded. The proximate analysis of the diet and carcass composition of fish (crude protein, crude fibre, ash, moisture content and lipid were determined using AOAC (1980). Data for each parameter were subjected to analysis of variance (ANOVA) while means of various results were compared at 5% level of significance. A preliminary study was conducted to determine the best processing method that reduced anti-nutrients to the minimum level without impairing nutrients composition. Boiled, toasted and soaked seeds were used. Bauhinia seeds soaked for 96 hours had least concentration of anti-nutrients. The experimental diets was formulated to contain soaked Bauhinia seed meal (SBSM) at levels of 25%, 50% and 75% inclusion (Diets 2, 3 and 4 respectively) with two diets acting as control (Diets 1 and 5). All diets were isonitrogenous (40% crude protein) and isocaloric (3212kcal/kg). A 12 weeks feeding trial was conducted in juveniles which were randomly distributed into 24 improvised non-recirculatory and semi-flow through indoor plastic tanks (52cm X 34cm X 33. 5cm) at a stocking rate of 10 fish per tank and three (3) replicates per treatment. The experimental design was complete randomized. The fish were fed at 5% body weight, twice daily. Diets with higher inclusion levels of SBSM (diets 3 and 4) significantly depressed growth formance of fish. The variations observed in the SGR, FCR, FER and PER were associated with the anti-nutrients present in the diets, these parameters reduced with increasing levels of SBSM in the diets of fish. Based on the relative cost of diets per unit eight gain and protein gain, diet 2 (25% SBSM) was most economical. The results suggested that SBSM can be used to substitute up to 25% levels of dietary protein in C. gariepinus juveniles without significant reduction in growth.
    Description: Includes: 4 tables;Also includes: 23 refs.
    Keywords: Ecology ; Aquaculture ; Nigeria ; Katsina State ; Growth ; Feed utilization ; i Clarias gariepinus/i ; freshwater environment ; Fish ; Feeding ; Utilization ; Diets ; Feeding experiments ; Carcasses ; Growth rate
    Repository Name: AquaDocs
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    Format: 66-74
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  • 9
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    Lenght-weight relationship and condition factor of blackchin tilapia (Sarotherodon melanotheron) cultured in sheltered outdoor tanks (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24082 | 19325 | 2018-05-12 14:16:24 | 24082 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Length-weight relationship (LWR) and condition factor (K) of ninety specimens of Blackchin tilapia, Sarotherodon melanotheron cultured for six months in sheltered outdoor tanks were conducted. Initial measurements averaged 0.04 g for weight, while the total length averaged 1.17 cm. Fortnightly, measurements of length and weight gain were recorded over a period of six months. At the end of the experiment, the total length averaged 12.58 cm while the average body weight was 28.55 g. The growth equation for the population studied is Log W = 2.808Log L - Log 1.6117 where the growth factor b estimated showed a negative algometric growth. The average condition factor k was found to be 1.754 ~c 0.329 and there was a very strong positive correlation (r = 0.99) between the length and weight of individuals examined. The correlation coefficient (R2) was estimated to be 0.9974. The implication of the LWR parameters to rearing this species in a confined enclosure was highlighted.
    Description: Includes: 2 tables and 1 figure;Also includes: 11 refs.
    Keywords: Aquaculture ; Ecology ; Sarotherodon melanotheron ; Nigeria ; Lagos ; Sarotherodon melanotheron ; Lenght-weight relatioship ; Condition factor ; freshwater environment ; Length-weight relationships ; Condition factor ; Fish ; Fish culture ; Population dynamics ; Fibre glass ; Culture tanks ; Fry
    Repository Name: AquaDocs
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    Format: 98-102
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  • 10
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    The induction of triploidy by cold shock in African giant catfish Clarias gariepinus, Burchell 1822 (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24085 | 19325 | 2018-05-12 14:21:06 | 24085 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Application of genetic manipulation techniques on cultured fish have been employed in developed economies to increase food fish yield. In this study, a simple and safe biotechnology genetic manipulation technique was applied to produce triploid African giant catfish (Clarias gariepiirus Burchell 1822) larvae .Eggs numbering 100~c10 in quadruplicates from C. gariepinus were activated by milt from the same species and were subsequently transferred to a thermoregulated refrigerator maintained at 2degreesC for 20 min to suppress cell division, starting at 4 min after activation. Haploid larvae were produced by activating eggs with UV irradiated milt at 30000 uWcm-2 for 15 min. Fertility, hatchability and survival after one week for triploids were 82.5%, 69.8% and 61.3% against haploid and diploid controls, 100%, 15%, 0% and 100%,93%, 91 % (p 〈 0.05) respectively. Ploidy levels of the embryos cytogenetically were evaluated in day-old posthatched embryos incubated in 0.02% colchicine for 2-4 h. Head and yolk sac were discarded in 0.9% NaCl while remaining fragments were later treated with hypotonic solutions of distilled water for 5 min, and subsequently with diluted catfish serum 1: 4 for 25 min. Cells were fixed with 1:3 acetic acid ethanol mixture. Slide with the chromosome spreads were then stained with 20% Giemsa in phosphate buffered solution. Chromosome numbers obtained were 28~c2, 56~c2, and 75~c2 for haploid control, diploid control and triploid treatments respectively. Using a simple biotechnology technique as above, triploid C. gariepinus larvae were produced in the present study. The potential application on food fish security of triploid catfish in aquaculture especially in Nigeria is discussed.
    Description: Includes: 1 table and 1 plate.;Also includes: 20 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Biotechnology ; Clarias gariepinus ; Chromosomes ; Aquaculture ; freshwater environment ; Genetics ; Cultured organisms ; Food fish ; Yield ; Biotechnology ; Fertility ; Hatching ; Sustainable development ; Aquaculture ; Aquaculture development ; Appropriate technology
    Repository Name: AquaDocs
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    Format: 117-122
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