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  • Fish culture  (89)
  • Antarctic bacterioplankton
  • Climate change
  • FISON  (90)
  • Penang, Malaysia  (14)
  • American Institute of Physics (AIP)
  • Nature Publishing Group
  • 1
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    Scoping report: current status of index-based insurance in Bangladesh (2021)
    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/12752 | 115 | 2013-12-03 14:04:41 | 12752 | WorldFish Center
    Details
    Publication Date: 2021-07-05
    Description: With current and anticipated increases in magnitude of extreme weather events and a declining consistency in weather patterns, particularly challenging for agriculture, there has been a growing interest in weather index-based insurance (IBI) schemes in Bangladesh. A number of weather index-based insurance products have already been tested and applied across Asia and Africa, with varying degrees of success, as a mechanism to improve livelihood security by enabling vulnerable populations to transfer risk associated with climate change, extreme weather events and other hazards. In the process, these efforts have generated important new knowledge on how these schemes can be designed and implemented for optimal results. However, the practice of index-based insurance is still limited in Bangladesh, and the experience and knowledge generated by the different stakeholders involved needs to be better communicated.
    Description: CGIAR Research Program on Climate Change, Agriculture and Food Security
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Description: International Fund for Agricultural Development (IFAD)
    Keywords: Atmospheric Sciences ; Agriculture ; Aquatic Agricultural Systems ; Climate change ; Insurance ; Bangladesh
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 10
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  • 2
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    Fish for the future: Fisheries development and food security for Kiribati in an era of global climate change (2021)
    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/15600 | 115 | 2014-11-19 10:02:49 | 15600 | WorldFish Center
    Details
    Publication Date: 2021-07-08
    Description: The Republic of Kiribati is a vast South Pacific island group with one of the largest exclusive economic zones (EEZs) in the world. Kiribati waters support a wealth of marine fisheries activities. These activities occur in oceanic, coastal and inshore environments and range from large, foreign, industrial-scale oceanic fishing operations to small-scale, domestic, inshore subsistence fisheries, aquaculture and recreational fisheries. Kiribati has developed a framework of domestic and international governance arrangements that are designed to sustainably manage its wealth of marine resources. The report provides background information for fisheries projects in Kiribati that aim to build food security, improve artisanal livelihoods and strengthen community engagement in fisheries governance. It provides information on the current status of Kiribati fishery resources (oceanic and coastal), their current governance and future challenges. Fish and fisher alike pay little heed to maritime boundaries and bureaucratic distinctions. This report covers both sides of the oceanic/coastal boundary because of the I-Kiribati communities’ interest in oceanic fisheries such as tuna and their heavy dependence on its fisheries resources for food security and economic development. The report focuses on two potential pilot sites for community-based fisheries management projects: North Tarawa and Butaritari.
    Keywords: Agriculture ; Aquaculture ; Adaptive management ; Aquatic resources ; Climate change ; Coastal fisheries ; Fisheries ; Governance ; Fisheries management ; Food security ; Marine fisheries ; Small-scale fisheries ; Livelihoods ; Gender ; Policy ; Pacific
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 79
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  • 3
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    Weather index insurance: Lessons learned and best practices for Bangladesh (2021)
    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/15687 | 115 | 2014-11-19 10:20:18 | 15687 | WorldFish Center
    Details
    Publication Date: 2021-07-09
    Description: WorldFish and the International Centre for Climate Change and Development (ICCCAD) held a two-day workshop on the topic of Weather Index-Based Insurance: Lessons Learned and Best Practices for Bangladesh. Weather index insurance is based on a predefined weather event which when triggered ensures automatic payout to farmers who have taken out insurance. For example, the climatic trigger could be a predefined consecutive number of days where rainfall is below a set level or when the floodwater level reaches above a certain point. Index insurance has been operating for about 10 years in many countries but is still at an early stage in Bangladesh, where there are two schemes currently being piloted and three other projects being developed. The aim of the two-day workshop was twofold: to ascertain the present state of index insurance in Bangladesh and elsewhere, and to work together to identify ways forward.
    Description: Report of a workshop held 8-9 September 2013, Dhaka, Bangladesh.
    Keywords: Agriculture ; Aquaculture ; Climate change ; Farmers ; Insurance ; Bangladesh
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 11
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  • 4
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    Economic analysis of climate change adaptation strategies in selected coastal areas in Indonesia, Philippines and Vietnam (2021)
    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/11250 | 115 | 2013-08-12 21:38:56 | 11250 | WorldFish Center
    Details
    Publication Date: 2021-06-30
    Description: This report is an account of a cross-country study that covered Vietnam, Indonesia and the Philippines. Covering four sites (one each in Indonesia and Vietnam) and two sites in the Philippines, the study documented the impacts of three climate hazards affecting coastal communities, namely typhoon/flooding, coastal erosion and saltwater intrusion. It also analyzed planned adaptation options, which communities and local governments can implement, as well as autonomous responses of households to protect and insure themselves from these hazards. It employed a variety of techniques, ranging from participatory based approaches such as community hazard mapping and Focus Group Discussions (FGDs) to regression techniques, to analyze the impact of climate change and the behavior of affected communities and households.
    Description: International Development Research Center (IDRC)
    Description: Swedish International Development Cooperation Agency (Sida)
    Keywords: Ecology ; Climate change ; Disasters ; Ecosystems ; Research ; Vietnam ; Philippines ; Indonesia
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 27
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  • 5
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    Exploratory analysis of resource demand and the environmental footprint of future aquaculture development using Life Cycle Assessment (2021)
    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/15594 | 115 | 2014-11-19 08:33:03 | 15594 | WorldFish Center
    Details
    Publication Date: 2021-07-08
    Description: Increases in fish demand in the coming decades are projected to be largely met by growth of aquaculture. However, increased aquaculture production is linked to higher demand for natural resources and energy as well as emissions to the environment. This paper explores the use of Life Cycle Assessment to improve knowledge of potential environmental impacts of future aquaculture growth. Different scenarios of future aquaculture development are taken into account in calculating the life cycle environmental impacts. The environmental impact assessments were built on Food and Agriculture Organization statistics in terms of production volume of different species, whereas the inputs and outputs associated with aquaculture production systems were sourced from the literature. The matrix of input-output databases was established through the Blue Frontiers study.
    Keywords: Agriculture ; Aquaculture ; Aquaculture ; Climate change ; Development ; Environmental assessment ; Environmental impact ; Research
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 27
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  • 6
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    Understanding the gender dimensions of adopting climate-smart smallholder aquaculture innovations (2021)
    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/20653 | 115 | 2016-06-01 02:08:39 | 20653 | WorldFish Center
    Details
    Publication Date: 2021-07-11
    Description: This study explored how climate-smart agricultural and aquaculture innovations may lead to more successful climate adaptation efforts and enhanced resilience for both men and women in households and across communities, as well as to improved and equitable outcomes in terms of income, nutrition and livelihood opportunities. Specifically, it investigated efforts to target women with household aquaculture innovations to understand (1) if such approaches enable women to use or benefit from them; (2) if and how usage impacts the sustained use of these innovations; and (3) if it would be possible to scale out these innovations to achieve large scale development outcomes.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Keywords: Aquaculture ; Sociology ; Aquatic Agricultural Systems ; Small-scale aquaculture ; Gender ; Climate change ; Research ; South Asia ; Bangladesh
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 43
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  • 7
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    Problems and prospects of fish culture in Mubi, Adamawa State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23225 | 19325 | 2018-03-18 14:49:23 | 23225 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper reviewed the major problems of fish pond culture in Mubi.The prospects for fish pond are highlighted and a call to awaken people initiatives in Mubi region to invest in fish farming is made so that the nutritional and economic status of the people of the region might be improved through aquaculture. Some of the problems identified are: lack of knowledge of the biology of culturable species, none availability of fish feed, none availability of fish seed and the peculiarity of the weather most expecially the very cold season when the temperature can be as low as 18~'C.
    Description: Includes:- 12 refs.
    Keywords: Aquaculture ; Nigeria ; Mubi ; freshwater environment ; Fish culture ; Freshwater aquaculture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 86 - 90
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  • 8
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    The genetic characteristics of cephalic abnormality and its aquaculture implication in Clarias gariepinus (Burchell 1822) (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23241 | 19325 | 2018-03-18 15:26:11 | 23241 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Cephalic abnormality in nine mating groups involving Clarias gariepinus with cephalic abnormality, non Cephalic and Maiduguri origin were investigated to determine the level and the genetic basis of the occurrences and its aquaculture implication. The highest mean percentage survival in a Cephalic crossed with non cephalic group was 68.6% whereas the last mean percentage survival was 25.7% in the group of Maiduguri cross with Maiduguri parent. Cephalic abnormality was observed in the crosses with both female and male cephalic with a total frequency ranging from 0 % to 70.8. %. The least number of cephalic abnormality was 18.5% which involved a cross of non cephalic with cephalic, and the highest was 70.8%. This level of cephalic abnormality shows that the defect was hereditary. This result implies that, the genetic factor is a major contributor in the feature of cephalic abnormality in Clarias gariepinus.
    Description: Includes:-1 table.;3 appendixes.;11 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Diseases ; Deformation ; Fish culture ; Genetics ; Abnormalities ; Genetic abnormalities
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 199 - 208
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  • 9
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    Optimum temperature and stocking density for transportation of tilapia (Oreochromis niloticus) broodstock in the semi-arid zone of Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23280 | 19325 | 2018-03-28 15:54:31 | 23280 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Oreochromis niloticus broodstock of mean weight 32.3g were cropped in the morning with dragnet from a 1 ha reservoir and transported in round tanks to the Hatchery complex of the National Institute for Freshwater Fisheries Research where they were stocked into 5m x 5m indoor concrete tanks filled with clean water and with aerators at a density of 4 fish/m1. They were acclimated for 5 days and then packaged into 60 liter capacity water proof bags at the following stocking densities: 60, 80, 100, 120, 140 fish/60 lit bag. Each stocking density had bags with ice blocks and bags without ice blocks in triplicate. The water proof bags were oxygenated, loaded into quick fitting plastic bowls and transported in a bus from New Bussa to Warra, Kebbi state, a journey of 3 hours. The trip was repeated four times. Percentage survival in bags with ice block were 100%for stocking densities 60, 80, 100 fish/60 lit bag, 95.1%for 120 fish/60 lit bag and 84. 7%for 1-10 fish/60 lit bag (mean temperature 23.5~?C). Mortalities were recorded in all the bags without ice block but the highest survival was in the bag with stocking density 60fish/60 lit bag (mean temperature 29.2~?C).
    Description: includes:- 3 tables.;6 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Stocking density ; Transportation ; Fish culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 318 - 320
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  • 10
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    Clinical changes observed in Clarias gariepinus (Burchell 1822) fed varying levels of ascorbic acid supplemented diets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23328 | 19325 | 2018-04-06 16:06:27 | 23328 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study was undertaken to observe the clinical changes associated with the dietary ascorbic acid supplementation in the diet of African catfish, Clarias gariepinus, using the presence or absence of scorbutic (ascorbic acid deficiency) symptoms as indices. Clarias gariepinus fingerlings (6.02~c 04g) were randomly distributed into glass tanks of 60 x 45 x 45cm3 dimension at ten fish per tank in a triplicate treatment. Five diets containing 40% crude protein was formulated. Ascorbic acid (AA) was supplemented in the diets as ascorbyl-2-polyphosphate (a mixture of phosphate esters of ascorbate). Each treatment had varying levels of ascorbic acid (AA) supplementation, at 0 (Control) 50, 100, 150 and 200mg AA/kg, in Treatments 1, 2, 3, 4 and 5 respectively. Fish were fed practical diets twice daily at 900hrs and 1600hrs. Weekly weighing of fish was done and data collected were subjected to statistical analysis. At the end of week 4, fish fed scorbutic diets (diets without Ascorbic acid) had significantly lower weight than fish fed AA supplemented diets (P〈0.05). After week 6, fish fed scorbutic diet began to develop clinical symptoms including lordosis (lateral curvature), broken skull, pigmentation and scoliosis (vertical curvature). Radiographs confirmed defects in the vertebral columns of fish in this treatment. Highest mortality was recorded in this treatment as 30%, In all parameters considered, treatment 4 fed 150mg AA/kg gave the best AA supplementation that prevented growth reduction and clinical signs of AA deficiency.
    Description: Includes:-3 tables.;11 plates.;17 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Feeding experiments ; Fish culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 32-37
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  • 11
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    Investment and employment potentials in fish farming in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23330 | 19325 | 2018-04-06 16:09:38 | 23330 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Investment opportunities in aquaculture that could lead to creation of employment in Nigeria was reviewed. Nigeria is a large fish consuming nation with the resource capacity to produce large quantity of fish for the country. The level of unemployment rate is increasing at an alarming rate. Employment opportunities in Agriculture sectors, in the area of Aquaculture deals with several sub sectors such as; seed production, transportation of live fish ,Water quality management, ornamental fish industries, supplies to aquaculture equipment and tools, aquaculture extension service, fish feed, fish meal production, fish processing, integrated rice-cum fish culture, and fish farm labor. These are all investment opportunities that can reduce unemployment, increase food security and poverty alleviation In Nigeria.
    Description: Includes:- 11 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Fish culture ; Investments
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 42-44
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  • 12
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    Status of fisheries and aquaculture development in Ekiti State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23340 | 19325 | 2018-04-07 17:19:26 | 23340 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Ekiti State has limited water surface area but blessed with some rivers and seven big reservoirs on which some artisanal fishery is being carried out by over 400 fisher folks. Fish farming in Ekiti state is largely dominated by Clarias gariepinus culture. Interest in fish farming is on the increase as farmers construct concrete fish tanks as small as 1.5m2 as well as series of contour earthen ponds or tanks as big as 30m2. The total number of ponds has grown numerically from 96 at the inception of the state in 1996 to about 2000 in 2008. The move towards private/public partnership in aquaculture development will improve the economic and nutritional status of the region.
    Description: Includes:- 1 table.;3 figs.;5 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ekiti State ; freshwater environment ; Fish culture ; Freshwater aquaculture ; Aquaculture ; Artisanal fishing ; Fishery development ; Stock assessment
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 76-79
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  • 13
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    Growth and survival of different sex combinations of Oreochromis niloticus (L) in glass tanks (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23354 | 19325 | 2018-04-08 12:03:29 | 23354 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Growth performance and survival rates of three different sexes of Oreochromis niloticus fingerlings (27.5~c 0.02g); mixed-sex, all male and all female fed 35% CP at 5% body weight was carried out for 56 days in indoor rearing operations. Aquaria tanks (60x30x 30cm3) were used as rearing tanks and each treatment was replicated. All female tilapia had the best specific growth rate (2.54%/day), food conversion ratio (1.98) as well as survival rate (98%), least value was obtained in treatment containing the mixed sex tilapia. Specific growth rate (2.06%/day), Food conversion ratio (2.27) and survival rate (95% ).
    Description: Includes:-2 tables.;1 fig.;7refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; New Bussa ; freshwater environment ; Survival ; Sex ratio ; Food conversion ; Fish culture ; Feeding experiments
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 128-130
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  • 14
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    Efficacy of formalin in the removal of adhesiveness from Clarias gariepinus eggs during artificial propagation (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23358 | 19325 | 2018-04-08 12:11:51 | 23358 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The aim of this study was to establish the efficacy of formalin in removing the adhesiveness of Clarias gariepinus eggs during artificial propagation and the effects on prospective fry. 1g of catfish eggs were put in five concentrations of formalin \{O.O (control), 0.4, 0.6, 0.8 and 1.0 mg/l\} at three exposure times (10, 15 or 20min). In each treatment, the detachment of eggs increases with exposure time but were not significantly different (P〉O.05). 0.4mg/1 of formalin had the highest number of detached eggs. At the highest formalin concentration 72% of the eggs still adhered together which provide a good substrate for the growth of fungi. The use of formalin delayed hatching of C. gariepinus eggs when compared with the control. The more the exposure period of C. gariepinus eggs to formalin, the higher the hatching time. Survival of fry was highest in the group that has been exposed to 0.4mg/1 and exposure period of l0min. At the highest concentration (1.0mg/l) and exposure period (20min), the survival was lower by 55.5%. Based on this study, the optimum concentration of formalin was O.4mg/l and exposure period of l0min. for the removal of egg adhesiveness, increase hatching and improved survival success of C. gariepinus.
    Description: Includes:- 4 figs.;10 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Preservatives ; Anticoagulants ; Coagulants ; Dispersants ; Fish culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 143-147
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  • 15
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    Gender issues in economics of fish farming in Maiduguri and environs (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23362 | 19325 | 2018-04-08 17:58:42 | 23362 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: This study focused and examined gender issues in economics of fish farming in Maiduguri and its environs. The socio-economic characteristics of the fish farmers were examined. The profitability of the industry and constrains affecting fish farming in the study area were analyzed. Stratified random sampling technique was used due to the heterogeneous nature of the population considering 30% of the fish farmers as the sampled size. Descriptive statistics and net farm income were used to analyse the data obtained. It was revealed that 81.25% of the respondents were male while female fish farmers represented 18.75% of the respondents. 84.40% of the respondents had tertiary education while farmers with secondary certificate and adult education constituted 12.50% and 3.10% respectively. Net farm income profitability analysis of male and female farmers were N193,767:00 and N445,557:00 respectively. It was also observed that the major constraints militating against fish farming in the study area were scarcity of fingerlings, lack of improved technology, inadequate capital, high cost of equipments, lack of land and management difficulties. It was recommended that adequate training, continuous capacity building and improved technology in fish production must be made available to farmers: and farmers should have access to sources of fingerlings.
    Description: Includes:- 3 tables.;2 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Maiduguri ; Women in Fisheries ; freshwater environment ; Sex ; Fish culture ; Women
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 159-162
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  • 16
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    Evaluation of Afzelia africana seeds as protein feedstuff in fish diets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23368 | 19325 | 2018-04-08 18:08:23 | 23368 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Seeds of the legume Afzelia africana were analyzed and evaluated for use as protein feedstuff in fish diets. The seeds were heated to inactivate the anti-nutritional factors. Two iso-nitrogenous diets (26%) were produced using A. africana or Bonga-fishmeal as protein sources and labeled FI and F2, respectively. The resulting pellets were sinking pellets and were well accepted by tilapia based on the reaction time to feed presence and proportion of pellets eaten within one hour. Fl pellets were more stable in water than F2 pellets with mean dissolution times of 190 mins and 135 mins, respectively
    Description: Includes:- 7 tables.;4 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Feeding experiments ; Feed composition ; Feed preparation ; Nutritional requirements ; Nutrition ; Fish culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 188-189
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  • 17
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    Survival and response of Oreochromis niloticus to different feeds (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23374 | 19325 | 2018-04-10 16:10:47 | 23374 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study determined the survival and the response of Oreochromis niloticus to different feeding compositions. 90 Oreochromis niloticus juveniles were fed different diets in triplicated treatments inside glass tanks. Treatment I comprised locally compounded diet; Treatment II, imported pelletized feed; and Treatment III - processed feathermeal based diet. Results showed that there was no significant differences (P〉0.05) in the weight gain, feed intake, survival and feed conversion ratio. However, Treatment I had the highest feed intake, while treatment n had the highest weight gain and feed conversion ratio.
    Description: Includes:- 4 tables.;21 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Feeding experiments ; Feed preparation ; Nutritional requirements ; Fish culture ; Survival
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 29-32
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  • 18
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    Genetic improvement of tilapia: challenges and prospects in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23373 | 19325 | 2018-04-10 16:09:38 | 23373 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The contribution of tilapia aquaculture in Nigeria to world output is negligible due to stunting, poor market value among others. This paper evaluates the aquacultural credentials of tilapia, some genetic improvement technology in cultured tilapia, namely, ploidy, hormonal sex reversal. transgenic, hybridization, and the necessity of Genetic Improvement in accelerating tilapia production in Nigeria. Investigation reveals the presence of O. niloticus with the highest growth perfermancc index (~h1=3.11) for Lake Kanji which indicates high growth potential in suitable culture environment and could serve as a good starting point for genetic development. The presence of ”wesafu”, an ecotype cichlid, endemic to Epe lagoon, Lagos, which grows to 1500g in the wild, appears to be an excellent candidate for genetic improvement of a commercial strain for the growing aquaculture industry. Tilapia Genetic improvement in Nigeria is faced with a number of setbacks. This includes short- term, scattered and disjointed funding, inadequate genetic research facilities, ecological risk, inadequate skilled manpower and poor documentation of tilapia genetic resources among others. Considering the growing importance of tilapia culture, the need to document, conserve, evaluate and utilize tilapia genetic resources is highlighted to enhance the success of food security in Nigeria.
    Description: Includes:- 3 tables.;26 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Fish culture ; Genetics ; Selective breeding
    Repository Name: AquaDocs
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  • 19
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    An integrated chicken-fish system in concrete ponds (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23380 | 19325 | 2018-04-10 16:41:16 | 23380 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Four treatments (in duplicate) were used to detennine the optimum combination ratio in the chicken-fish integrated system in 4 m2 concrete ponds. Treatment I (TI) consisted of a concrete pond integrated with one point-of-lay chicken while treatment 2 (T2) had two point-of-Iay chickens integrated over a concrete pond. Treatment 3 (T3), consisted of three point-of-lay chickens integrated over a pond and treatment 4 (T4) was the control and involved no integration. Each concrete pond was stocked with a poly-culture of Oreochromis niloticus and Clarias gariepinus in a ratio of 3:1. Compounded fish feed was used to feed the fish in T4 twice daily at 5% of their body weight while fish in TI. T2 and T3 fed on wet chicken manure and spilled chicken feed that fell directly into the ponds. The daily manure loading rate ranged from 55.80g in TIR2 (treatment l replicate 2) to 117.37 g in T3RI while spilled feed loading rate ranged from 2.52 in T2R2 to 9.27g in T3R2. The total number of eggs laid was 871 in 84 days. For C. gariepinus, fish in T4RI had the highest mean weight gain of all the treatments and TIRI, the lowest. T3R2 had the highest mean weight gain of all the integrated treatments. For O. niloticus fingerlings, fish in T4 which were fed compounded feed had the highest mean daily weight gain and while those in T1 had the lowest. T4RI fish had the highest mean weight gain while TIR2 fish had the lowest. Fish in T3 had the highest mean weight gain of all the integrated treatments followed by fish in T2. However, physico-chemical parameters were more adverse and survival was lower in T3 than in T2 and so a combination ratio of 20 fingerlings in a 4 m2 concrete tank integrated with two laying chickens (mean weight 1.93 kg) is recommended. This translates to 50 laying chickens/100 m2 concrete pond stocked with 500 fingerlings.
    Description: Includes:- 3 tables.;Refs.
    Keywords: Aquaculture ; Nigeriaa ; New Bussa ; Rice-Fish- Culture ; Poultry-Fish-Culture ; freshwater environment ; Fish culture ; Rice field aquaculture ; Agropisciculture
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  • 20
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    Utilization and growth response of Clarias gariepinus fingerlings fed varying inclusion levels of livestock vitamin grower´s premix (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23365 | 19325 | 2018-04-08 18:04:12 | 23365 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 70 day experiment was conducted to determine the correct level of inclusion of livestock vitamin premix in the diet of Clarias gariepinus fingerlings and to monitor the utilization efficiency and growth performance of the test fish. 180 fngerlings of C. gariepinus were randomly distributed to six treatments, each weighing 0.76 ~c 0.05g. Thirty fingerlings per treatment were used. Each treatment had varying levels of livestock vitamin premix except the control that had no additional vitamin premix. Weighings of fish were done weekly and feed adjusted accordingly. The data collected were subjected statistically to descriptive and analysis of variance. All the treatments were significantly different from each other and also from the control at (P 〈 0.05). The highest mean weight gain was recorded in treatment 5 (0.910) which had 2% premix inclusion. The carcass analysis showed Ts with the highest crude protein level (64.43%). The highest daily and weekly mean weight gain were recorded in treatment 5; O.013g and 0.130g respectively. The feed conversion ratio (FCR) was lowest in T1, (2.147). The FCR for T5 (2.535) was insignificantly different (P 〈 0.05) from T1,. The fish feed control had the best FCR. T5 had the best utilization and growth performance when the average weight gain and the carcass crude protein composition and energy were compared. The fat deposited in fingerlings fed T5 were moderately (5.63) lower than treatment 6 with 5.86. It can be concluded that the fish fed treatment 5 will be less fatty than fish fed treatment 6 but more fatty than the fish fed the controls.
    Description: Includes:- 5 tables.;12 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Feeding experiments ; Feed composition ; Feed preparation ; Fish culture ; Vitamins
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  • 21
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    Evaluation of Nile tilapia (Oreochromis niloticus L.) fed dietary potato peels as replacement for yellow maize (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23361 | 19325 | 2018-04-08 17:57:30 | 23361 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The recent increase in the numbers of fast food vendors in Akure means that large quantities of Irish potato peels will be generated and discarded with high propensity for causing environmental pollution. Also the prize of maize in Akure has increased by about 31 % between January and August 2009. Therefore, the present study evaluated the bio-economic use of Irish potato peels in Nile tilapia diets with a view to achieving environmentally friendly and cost effective fish production. Nile tilapia (29.4 ~c 1.40g) was fed five diets (01-05) in glass tanks for 56 days. The basal diet (01) contained 26% yellow maize and 35% CPO Then the yellow maize in diets 02-05 was replaced with potato peels at 10, 20, 30 and 40% respectively. At the end of the experiment, growth of the fish was statistically the same in all treatments. However, fish fed 03 and 04 showed uniform and best potentials while the fish fed 05 had the worst performance indicating 30% replacement as the optimum. Economic estimation showed that lkg diet costs about (N81.6-N103.6) depending on the level of potato peels inclusion in the diets while (1.12-1.67kg) of fish was produced from each treatment with 85-95% survival rate of the fish. Incidence of cost (IC) showed marginal variations among the treatments with 30% replacement having the least and 40% replacement the highest costs of fish production. 40% replacement had the highest IC because of high mortality (15%) and poor growth of fish under the treatment. Similarly, the profit index (PI) was closely related with 30% replacement having the highest profit margin. In conclusion, both growth and economic indices established that Irish potato peels can replace up to 30% of yellow maize in diets of Nile tilapia
    Description: Includes:- 4 tables.;7 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Akure ; Fish nutrition ; freshwater environment ; Feeding experiments ; Feed efficiency ; Fish culture ; Nutrition
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  • 22
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    Effects of feed colour on growth and nutrient utilization of Tilapia zillii (Gervais 1852) (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23363 | 19325 | 2018-04-08 17:59:50 | 23363 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A feeding trial was conducted for 75 days to determine the effects of feed colours on nutrient utilization and growth in Tilapia zillii fingerlings. Four different food colourant \{Food Drug and Cosmetic (FD and C) colour red, blue, green and yellow\} was added to a basal diet 350g crude protein and 18.5MJ gross energy/kg diet and fed to T. zillii. There were five diets in all, the control (normal light brown commercial diet) (Diet 1), red-coloured diet (Diet 2), and blue-coloured diet( Diet 3), green-coloured diet(Diet 4) and yellow-coloured diet (Diet 5) and fed to triplicate groups of T. zillii at 4% body weight. Ten (10) T. zillii (14.00:t 0.003g) fingerlings were stocked in each concrete tank making a total of 150 fingerlings. The growth performance of the fish fed the yellow-coloured diet (Diet 5) had the best growth performance and nutrient utilization with Feed conversion ratio (FCR) and Specific growth rate (SGR) of 0.031:t0.80 and 1.17:t0.On respectively, this was followed by fish fed green-coloured diet, followed by fish fed red-coloured diet, followed by the fish fed the control diet (normal light brown commercial diet) and lastly, the fish fed blue-coloured diet had the least growth performance.
    Description: Includes:- 2 tables.;1 fig.;1 plate.;11 refs.
    Keywords: Aquaculture ; Tilapia zillii ; Nigeria ; freshwater environment ; Feeding experiments ; Experimental culture ; Feed efficiency ; Fish culture
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  • 23
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    Water parameters in Ilaje Local Government Area Ondo State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23364 | 19325 | 2018-04-08 18:02:40 | 23364 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Ilaje Local Government Area of Ondo State is blessed with many rivers, lagoons, tributaries lakes and a very long coastline, of about 180km making the State as a coastal state with the longest coastline in Nigeria. The people are predominantly fishermen. The fish produced from this area could be further boosted through farming of fish especially in cages along the available creeks at not much cost to the inhabitants. This study shows that the waters of the area were found optimal for fish production. This further buttressed by the fact that the area has been an active zone of fish production for ages. This historical perspective is been considered as the baseline in the study for perpetuating the culture of fish and other aquaculture species in the area
    Description: Includes:- 7 refs.
    Keywords: Aquaculture ; Limnology ; Nigeria ; Ilaje ; freshwater environment ; Fish culture ; Cage culture
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  • 24
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    Challenges of fish farmers in Ondo State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23384 | 19325 | 2018-04-10 16:48:49 | 23384 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study assessed fish farmers in Ondo State, south west agro-ecological zone of Nigeria using a sample size of 100 respondents, selected through a multi-stage sampling technique. Instrument for data collection was semi-structured questionnaire. Data were analysed using frequency counts and % of the respondents. Results showed that majority (52.0%) of the respondents are middle aged, 95.0% male, 93.0% married with a higher education (45.0%). The most important fisheries technology adopted by the farmers is disease control management. 67% indicated lack of finance and high cost of fish seed (58.0%) as the most important problems encountered. It was recommended that adequate incentive and grants should be given to farmers to finance fish production.
    Description: Includes:- 1 table.;1 fig.;11 refs.
    Keywords: Aquaculture ; Nigeria ; Ondo State ; freshwater environment ; Fish culture ; Freshwater aquaculture ; Sociological aspects ; Socioeconomic aspects
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  • 25
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    Control of reproduction in Oreochromis niloticus using pawpaw seed meal as reproduction inhibitor (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23408 | 19325 | 2018-04-12 09:01:23 | 23408 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Pawpaw (Carica papaya) seed meal (PSM) was added to a basal diet (350g crude protein and 18.5MJ gross energy lkg diet) at 0, 0.5, 1.0, 1.5 or 2.0 g/kg diets and fed to mixed-sex Oreochromis niloticus for 60 days to evaluate the effects on growth, feed conversion ratio, reproduction traits, and histology of gonads. There were no variations (P〉0.05) in growth parameters and feed conversion ratio. Indices of reproduction traits decreased with increasing dietary PSM levels. Fish fed with the basal diet had higher and better indices of reproduction traits (P〈0.05) than the fish fed with PSM diets. Fish fed O.0g PSMlkg diet showed normal testicular and ovarian tissues, and no lesions were observed. Fish fed O.5g PSMlkg diet showed slight increase in interstitial cells in testes. Fish fed 1.0g PSMlkg diet showed swollen spermatids nuclei, increased interstitial cells and focal necrosis in testes; and hydropic degeneration, ruptured follicles, granulomatous inflammation in the insterstitium and necrosis in ovaries. Fish fed 1.5g PSMlkg diet exhibited atrophy of seminiferous tubules in testes. Fish fed 2.0g PSMlkg diet, there was disintegration of spermatids and necrosis in testes and severe atretic follicles in ovaries. Reproduction traits and histological observations of gonads in O. niloticus fed high dietary PSM levels revealed that pawpaw seeds may be effective as a reproduction inhibitor in O. niloticus.
    Description: Includes:- 4 tables.;23 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Feeding experiments ; Experimental culture ; Nutritional requirements ; Fish culture
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  • 26
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    Potentials of poultry offals in African catfish diets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23407 | 19325 | 2018-04-12 09:00:06 | 23407 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 70-day feeding trial was conducted to test the effect of partial replacement of fishmeal by poultry offal in African catfish Clarias gariepinus diets. Four isonitrogenous ration containing various levels (0%, control), 30%, 60% and 90% of poultry offal were fed to three replicate groups of C.gariepinus fingerlings with a mean initial weight of 0.74~c 0.15 g. 10 fish/plastic bowl were tested in 15 I capacity plastic bowl. Mean weight gain of the fingerlings fed the control were higher (2.43~c 0.12g) compared to fish fed 30%, 60% and 90% poultry offal inclusion of Hsh meal (1.99~c 0.08g, 1.84~c0.06g and 1.14~c 0.20g, respectively), but there was no significance difference (P~〈 0.05) in weight gain of fish. There was no significant variation in feed conversion ratios which varied between 0.46~c 0.12 and 0.53~c 0.20 for the control and 90% poultry offal respectively, obtained among the groups. Similarly, specific growth rate and protein efficiency ratio decreased as the level of poultry offal increased in the diet. It was concluded that the replacement of fish meal with chicken offal meal diet at 30% level will enhance growth performance of Clarias gariepinus
    Description: Includes:-4 tables.;9 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Ibadan ; freshwater environment ; Feeding experiments ; Experimental culture ; Feed preparation ; Nutritional requirements ; Fish culture
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    Design and construction of electronic security system for aquaculture water-recirculatory system (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23414 | 19325 | 2018-04-12 09:08:55 | 23414 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Electronic play a vital role in providing security. A security alarm system was designed and constructed to safeguard aquaculture water recirculatory system against illegal entry. The system involved a laser touch which is easily available and it is used for the operation of the device. The laser beam is directed across the entrance to the water recirculatory system, falling on a light dependent resistor (L.D.R). Any unwanted interruption of the laser beam would result into energization of the alarm and indicating security danger. A prototype water recirculatory system was constructed and interfaced with the devices and the device was found efficient and reliable.
    Description: Includes:- 2 tables;1 fig.;4 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Electronic equipment ; Security ; Defence craft ; Fish culture
    Repository Name: AquaDocs
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  • 28
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    Appraising three (3) decades of aquacultural development in Imo state (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23420 | 19325 | 2018-04-25 19:21:06 | 23420 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A survey was carried out to appraise the level of aquacultural development in the last 30 years in Imo State, South eastern, Nigeria. The study was conducted by the use of questionnaires and visits to fish farms in all the three senatorial zones of the State namely; Okigwe, Orlu and Owerri. Data collected revealed that 79.49% of the farms were owned by individuals while values of 12.82%, 5.13% and 2.56% represents government, community and cooperative ownership respectively. However, 17.95% of ponds were established between 1978-1988 while 46.15% represents fish ponds established between years 1998-2008 . Earthen ponds were commonest with pond areas varying between 400-10,000m2.
    Description: includes:- 8 tables.;6 refs.
    Keywords: Aquaculture ; Nigeria ; Imo state ; freshwater environment ; Aquaculture development ; Fish culture
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    Economics of trickling biological periwinkle shell filter for closed recirculating system (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23417 | 19325 | 2018-04-25 19:14:49 | 23417 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Studies on the economics of trickling biological periwinkle shells filter for closed recirculating catfish system was carried out at the University of Science and Technology, Port Harcourt, Nigeria for 12 weeks. The periwinkle shells biofilter and other recirculating aquaculture system (RAS) components were designed and set up for a pilot catfish production using Clarias gariepinus juveniles at the stocking density of 400 fish/m3. Using fish holding tank volume of 0.21m3, biofilter volume of 1m3, sedimentation tank volume and flow rate of 4.20m3 and 0.78m3/hr respectively, lift pump flow rate of 2.10m3/hr, and an annual production of 3 tons of catfish, a record of all financial expenditures was kept. The financial analyses of the system with periwinkle shells filter and that of imported plastic filter block of same size were prepared. The discounted cash flow projections for the two systems were also prepared. From the discounted cash flows, the economic viability indices for the two systems were computed. The economic analysis compared the profitability index of 1.45 and the payback period of 2.50 years for the system with periwinkle shells filter to the profitability index of 0.60 and payback period of 5.90 years for the imported plastic filter block, and concluded that the system with periwinkle shell filter was cheaper and more cost effective
    Description: Includes:- 5 tables.;10 refs.
    Keywords: Aquaculture ; Nigeria ; Port Harcourt ; Recirculatory aquaculture system ; freshwater environment ; Fish culture ; Cost analysis
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  • 30
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    Growth performance and nutrient utilization of common carp (Cyprinus carpio and Cyprinus carpio var specularis) fingerlings in New Bussa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23424 | 19325 | 2018-04-25 19:30:19 | 23424 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An investigation was carried out into the growth performance and nutrient utilization of common carp fingerlings in New Bussa, Nigeria, at the Hatchery Complex of National Institute of Freshwater Fisheries Research (NIFFR). The Carps were purchased from Jos, and transported to New Bussa, acclimatized for two weeks and stocked in outdoor concrete tanks measuring 2mx2mx1m containing filtered water to the level of 0.5m. Average weight and total length at the time of stocking were 40.80g and 6.30g respectively. The fish were stocked in four treatments, each replicated thrice at varying stocking densities of 3, 6, 9 and 12fish/m2 respectively. The fish were fed 35% crude protein formulated feed at 5% biomass and each daily feed was divided into two equal parts and fed manually by 9.00am and 6.00pm. Quantity of feed adjusted according to weight gain. Biweekly sampling was carried out for a period of 8 weeks, their morphological studies carried out. Weight gain, total length and feed consumed were recorded. Water parameters were monitored every sampling day. The result revealed that there is significant difference (P〈0.05) in all the parameters. The group with 48 (12 fish /m2) density exhibited significantly (P〈0.05) poorest weight gain and there was no significant difference (P〉0.05) between 12 and 24 stocking (3 and 6 fish/m2) densities as far as weight gain is concern. All other parameter; SGR, length, weight gain and feed consumed were also significantly different (P〈0.05). The treatment with 12fish/m2 showed significantly (P〈0.05) poorest feed conversion ratio (FCR). The treatment with stocking of 3 and 6fish/m2 performed best, therefore this stocking range is recommended in this zone. Acquiring of carp from colder region to hotter region is better done in the peak of raining season and to be transferred to earthen pond before hot weather resumes.
    Description: Includes:- 13 refs.
    Keywords: Aquaculture ; Cyprinus carpio ; Cyprinus carpio var specularis ; Nigeria ; New Bussa ; freshwater environment ; Growth rate ; Nutritional requirements ; Feeding experiments ; Fish culture ; Food conversion
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    Growth response and survival of Heterobranchus longifilis cultured at different water levels in outdoor concrete tanks: implications for culture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23425 | 19325 | 2018-04-25 19:31:54 | 23425 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Thirteen-day-old hatchery-raised fry obtained from hormonally-induced spawns of mature African catfish H. longifilis broodstock were introduced to three different water levels (0.35, 0.50 and 0.65 m) in four replicates in 12 units of 2x2x1m3 outdoor concrete tanks. The fry were similarly stocked initially at 50 fry/m2 and later thinned down to 5 fish/m2 and cultured for 6 months. Fish were fed twice daily with commercial pellet feeds (Coppens?) while adjusting the feeding rate from 10 to 4% body weight and pellet size from 0.2 to 4.5 mm. The effects of pond water levels were evaluated in growth responses and survival. Water quality variables were similar (p 〉 0.05) in all compartments. Temperature, dissolved oxygen and pH were at the optimum level for fish. The results reveal significant (P 〈 0.05) treatment effects on growth performances. Fish kept at the highest pond water depth (0.65m) were heavier (P 〈 0.05) and had a higher specific growth rate (P 〈 0.001) than the others. Food conversion ratio and survival rate were unaffected by the experimental treatments. ANOVA revealed significant differences (P〈0.05) with culture period. The lowest water depth (0.35 m) favoured fish growth in the first 3 months while the highest water depth (0.65 m) favoured fish growth from the fourth month upwards (P〈0.05). These results are important because they indicate the optimum water depths for the culture of H. longifilis from fry to sub-adult and from the grow-out/fattening of sub-adult to adult, respectively, in outdoor concrete tanks.
    Description: Includes:- 3 figs.;35 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Abia State ; freshwater environment ; Fish culture ; Survival ; Feeding experiments
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    Fish hatchery survey in Borno State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23428 | 19325 | 2018-05-02 08:04:53 | 23428 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Aquaculture is regarded as being uniquely placed to reverse declining supplies from capture fisheries and for this to be realized, fish hatchery has a notable role to play. Fish hatchery is the bedrock upon which true and sustainable fish farming can be built. A field survey was conducted in the 3 geo-political zones of the State to look into the number and functionality of fish hatcheries. Results showed that there were about 23 fish hatcheries in the State with the majority concentrated in Maiduguri metropolis. Private ownership (79%) dominated of which 84% were functional. Average annual production is less than 10,000 fingerlings in most hatcheries while the wild sourced fingerlings were used as alternative by the majority. Most hatcheries (62%) made use of concrete tanks for breeding and nursery. All the respondents were of the opinion that the level of patronage was encouraging, though agreed that the level of aquaculture development in the State was low. However, few among the respondents said aquaculture development in the State is on the increase due to low productivity of natural water bodies for the past 10 years. Recommendations were made on how to improve hatchery operation that could help to boost aquaculture development in the State
    Description: Includes:- 3 tables.;3 figs.;5 refs.
    Keywords: Aquaculture ; Nigeria ; Borno State ; Hatchery management ; freshwater environment ; Fish culture ; Freshwater aquaculture
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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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    Design of pumping station for a tidal fish farm in Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24173 | 19325 | 2018-05-13 18:55:18 | 24173 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The design of pumping station for submersible FLYGT pump 3102 version LL to redress the water supply problem of some ponds in the tidal fish farm of African Regional Aquaculture Centre (ARAC) located in Omuihuechi, Aluu, Rivers State, Nigeria was carried out. Prior to the design baseline study was carried out for the proper sitting of the pumping station. The topographic survey of the area indicated gentle sloping woodland, with the highest and lowest elevations of 11.00 m and 1.00 m respectively. The mean peak heights of water in the supply canal during spring and neap tides ranged from 0.95 to 1.45 m and 0.38 to 0.86 m respectively. The flood tide and ebb tide velocities of supply canal water flow varied from 0.40 to 0.75 m/s and 0.75 to 0.92 m/s respectively. Soil particle size analysis indicated loamy clay and clay soils. The results of pumping station design were 1.80 m (length), 1.30 m (width); 3.60 m (height),0.15 m (thickness), I (cement) : 2 (sand) : 4 (gravel) (concrete mixture ratio) and 12 mm (reinforcement bar). Results of pump characteristic calculation were 0.069 m〈sup〉3〈/sup〉/s (discharge) ,4.02 m/s (pumping velocity), 5.73 m (total dynamic head), 0.82 m (minimum submergence depth), 5.04 KW (pump power)and 0.40 and 0.30 m ( clearances from floor and wall respectively). The results obtained were considered adequate for the purpose of construction of the pumping station for the pump and the procedures adopted will assist in similar design tasks in the development of fish farms in the Niger Delta Region of Nigeria and beyond.
    Description: Includes: 4 tables and 4 figures.;Also includes: 20 references.
    Keywords: Aquaculture ; Limnology ; Nigeria ; Niger Delta ; freshwater environment ; Fish culture ; Pump stations ; Tidal inlets ; Fish ponds ; Construction ; Construction materials ; Design ; Topography ; Soils ; Water pumps ; Aquaculture equipment
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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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    Aquaponics: a new trend in food production (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24175 | 19325 | 2018-05-13 18:58:18 | 24175 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The increase in population coupled with current and escalating extent of soil degradation, water scarcity and climate-related challenges plaguing agricultural productivity in every corner of the world and particularly in Nigeria demands for alternative food techniques, one of them called aquaponics. This paper highlights a new trend in food production techniques for the production of fish and vegetable crops in aquaponics. Aquaponics is experiencing renewed interest worldwide with many small home growers and large operations employing the process as a means of producing sustainable fish and plant crops. The design of this scalable farming system closely mirrors that of recirculating systems in general, with the addition of a hydroponic component and the possible elimination of a separate biofilter and devices for removing fine and dissolved solids. The benefits of aquaponics includes conservation of water resources and plant nutrients, intensive production of fish and reduced operating costs relative to either system in isolation. Aquaponics, without doubt is a practice that is receiving considerable interest due to an ever increasing need for fresh wholesome food and sustainable eco-friendly agricultural practices.
    Description: Includes: 3 figures.;Also includes: 12 references.
    Keywords: Aquaculture ; Nigeria ; Ibadan ; Aquaculture ; Hydroponics ; Recirculating system ; Sustainable ecosystem ; Natural fertilizer ; Aquaponics ; freshwater environment ; Plant culture ; Sustainable development ; Environmental impact ; Food security ; Aquaculture development ; Organic fertilizers ; Recirculating systems ; Agropisciculture ; Water resources ; Conservation ; Aquaculture techniques ; Fish culture
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    The status of fish genetics and breeding towards sustainable aquaculture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24202 | 19325 | 2018-05-16 15:26:01 | 24202 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper, fish genetics and breeding in Nigeria addresses the application of genetics and breeding to fish farming with the view to enhanced aquaculture production in Nigeria. This production technique is not limited to the use of conventional breeding programs nor is it necessary to go through the basic developmental steps of selection and isolation that lead to the domestication and diversification of livestock and crops over thousands of years. With modern molecular genetic techniques and induced breeding, it is now possible to develop and create new fish species .
    Description: Includes: 12 references
    Keywords: Aquaculture ; Nigeria ; Delta State ; freshwater environment ; Genetics ; Sustainability ; Induced breeding ; Biotechnology ; Seed (aquaculture) ; Aquaculture techniques ; Fish culture
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    The role of biotechnology in aquaculture and fisheries development (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24204 | 19325 | 2018-05-16 15:29:46 | 24204 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Biotechnology per se is not a panacea for the world's problems of hunger and poverty. However, genetic engineering in particular, offers outstanding potentials to increase the efficiency of animal improvement. Thus, biotechnology could enhance global food production and availability in a sustainable way. Case studies from Egypt and India also demonstrate that highly immune genetically modified fishes, transgenic fishes, chromosome engineering and gene banking are very appropriate for fish farmers and consumers in developing countries. As the entire technology can be packaged into the germ cells of fish, it can easily be integrated into traditional small-holder fish farming systems. Except for a few innovative transfer projects, though, the application of biotechnology until now remains concentrated in the industrialized world. Combined with insufficient own scientific and regulatory capacities, the increasing privatization of international aquacultural and fisheries research and the strengthening of intellectual property rights complicate the access of developing countries to biotechnology. Profound constitutional adjustments are therefore essential to ensure that biotechnology does not bypass the poor.
    Description: Includes: 15 references.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ebonyi State ; freshwater environment ; Biotechnology ; Sustainability ; Genetically modified organisms ; Gene banks ; Fish culture ; Aquaculture development ; Food security
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    Trophic ecology of fishes: consolidating the basic (traditional) methods (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24226 | 19325 | 2018-05-19 07:15:01 | 24226 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Studies of food and feeding ecology are important to investigate trophic interrelationships of fishes in their resident water bodies. These are usually achieved using various important methods. However because no single measure gives an overall representation of the feeding habits of fish, best results are achieved only when methods are used to complement one another. This paper reviews various methods used in studying trophic fish ecology and suggests consolidation of the traditional or basic methods with relevant statistical indices and local ecological knowledge. More advanced methods are also proposed as valuable tools because they compensate for some possible errors that may arise from the use of quantitative methods.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Oyo State ; freshwater environment ; Ecosystems ; Trophic levels ; Interspecific relationships ; Trophic relationships ; Food ; Ecology ; Consolidation ; Methodology ; Feeding behaviour ; Stomach content ; Food webs ; Statistical analysis ; Fish culture
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    Nutrient and pH stability in liquid manure production and usage for pond fertilization (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24236 | 19325 | 2018-05-20 05:22:21 | 24236 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Nutrient content of organic manure vary according to the composition which determines the fertility and efficiency. The effectiveness of liquid manure depends on the N.P.K value of the manure source. One kilogram of each manure source was weighed and loaded into a polyethylene bag for ten (10) days anaerobic fermentation. pH was monitored for five consecutive days after the second day using Digital pH meter (Model PHeP NOVO Illkirch Cedex France) with values ranging between 5.6-6.3 and 5.7-6.9 for both liquid manures slurry. The liquid manure was produced from Pig and Poultry manure slurry with N.P.K values range between 4.80-5.96, 4.10-4.66,0.47-0.80 and 7.50-8.80, 3.25-5.60, 0.79-0.85 for Pig and poultry manures respectively. Organic manure loose nitrogen when exposed to extreme temperature due to volatilization of NH3. Therefore, in liquid manure production, anaerobic fermentation enhances nutrient stability through immobilization of ammonia-nitrogen compounds. The interaction of N.P.K and pH shows the availability, stability and quality of nutrient in the liquid manure produced. Anaerobic fermentation produces better quality liquid manure than the manure due to immobilization of ammonia nitrogen. Both liquid manure had positive correlation (R2) of 0.6977 and (R2) of 0.2370 for Poultry and Pig liquid manure. Liquid manure application in ponds can reduce cost of pond fertilization especially in the integrated fish farming system than the use of organic manure directly serving as a better means of pond fertilization and pollution control in the farm environment under a stressed economy.
    Description: Includes: 14 references.
    Keywords: Aquaculture ; Nigeria ; Enugu ; Anaerobic fermentation ; Organic slurry ; liquid manure production ; freshwater environment ; Nutrients (mineral) ; pH ; Stability ; Fish ponds ; Fermentation ; Anaerobic bacteria ; Fish culture ; Freshwater aquaculture ; Pond culture ; Manure ; Organic fertilizers
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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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    Climate change: impacts and threats on freshwater aquaculture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24583 | 19325 | 2018-05-20 15:55:56 | 24583 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper examines the major effects of climate charge on aquaculture, especially on the freshwater ecosytem. Aquaculture as established is not practiced evenly across the world. Therefore, the paper highlights the current aquaculture practices within the regions and across the different environments to ascertain the major effects of climate variations on the freshwater ecosystem and aquaculture practices in particular. The main elements of climate change that would impact on aquaculture produ ction, such as sea level and temperature rise, changes in monsoon patterns and extreme climatic events and water stress, among others were properly looked at and the reasons for their effects addressed. The different elements of climate change that are experienced in varying degrees can be either positive or negative or directly or indirectly, depending on the different culture systems that are practiced. It is in the process of our study that we brought out the complex attributes of climate change as it affects aquaculture productivity and the possible roles that the society can play to ameliorate the harsh effects of this ugly monstet; referred to as ”climate change and the consequent global warming trends.
    Description: Includes: 17 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Nigeria ; Climate change ; Freshwater ; Aquaculture ; freshwater environment ; automation
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    Synthesis of climate change effects on water sources for aquaculture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24592 | 19325 | 2018-05-20 16:08:17 | 24592 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of climate change on the aquatic environment has been well documented with results detailing increase in green house gases and global temperature. Water quantity and quality for aquaculture is also affected by this global phenomenon. Increasing global temperatures affects many sectors in an ecosystem. Water use in aquaculture can be in-situ or ex-situ. Groundwater is expected to be recharged if climate change leads to increased rainfall and runoff but empirical evidence suggests otherwise. The sustainability of groundwater for aquaculture is therefore threatened. Increased temperatures of surface waters can affect water quality and suitability for use in aquaculture with attendant biofouling and growth of thermophilic algae. Rainwater is affected by human activities and pollution as well as materials used for its collection. It is usually low in pH and will need to be buffered. The use of water from any source as well as the use of water bodies for aquaculture must be done with regular analysis of parameters since climate change is an ongoing process.
    Description: 34 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Nigeria ; Groundwater ; Surface water ; Rain water ; Climate change ; Aquaculture ; automation
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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
    Publication Date: 2021-07-15
    Description: 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.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Clarias gariepinus ; Nigeria ; Climate change ; Silver catfish ; Chrysichthys nigrodigitatus ; freshwater environment ; automation
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    Perception of fish farmers to climate change and adoption strategies in Oyo State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24667 | 19325 | 2018-05-27 15:06:16 | 24667 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study identified the perception of fish farmers in Oyo State to climate change as well as the adaptation strategies used by them. A two stage stratified sampling method was used to select 156 fish farmers from the four Agriculture Development Programme (ADP) zones and eight local government areas (LGAs) in Oyo State. Structured questionnaires were administered to the fish farmers. Descriptive statistic and linear regression were used to analyses data collected. The result shows that majority were males (84.0%\}, dominant age (66.0%) were within the age bracket of 46-65 years. The farmers are literate as 46.8% have attained secondary education, 69.9% had above six years of experience in fish farming experience and 97.5% were engaged in culturing catfish Clarias spp. The highest portion (70.5%) earns less than N500,000 as income from fish sale. Due to effect of climate change on fish production in the study area, fish farmers reported different types of adaptation strategies. Result of the linear regression analysis indicates that there is a significant (p〈0.05) negative effect of household size and years of fish farming experience and significant (p〈0.1) positive effect of age on farmers' perception of climate change on fish production.
    Description: Includes: 7 references.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Agriculture development programme ; Climate change ; Fish farmers ; 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 use and acceptability of medicated fish feed in aquaculture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24172 | 19325 | 2018-05-13 18:53:40 | 24172 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Medicated feed in animal production systems is essential to economically produced healthy and high quality product, as it can be used to control bacterial disease. The paper review, outlined the availability of common medicated fish feeds used in aquaculture such as; Terramycin, Romet and Homemade medicated feeds. This paper also review Common Anti-parasitic medicinal foods on the Nigeria market, such as; Jungle Anti-Parasite Medicated Fish Food and MetroMed. It also emphasizes on how to select proper medication for use in aquaculture and how to store medicated feed. Medicated feed is recommended to control bacterial disease outbreaks which may be controlled by antibiotics. There are only two widely accepted and approved antibiotics available in medicated feeds for food fish. However, early diagnosis and treatment are necessary because once fish are sick they are unlikely to eat, and prevention through good management practices is the best control measure for bacterial diseases.
    Description: Includes: 8 references.
    Keywords: Aquaculture ; Nigeria ; Delta ; Medicated feed ; Aquaculture ; Terramycin ; Romet ; Nigeria ; freshwater environment ; Feed ; Antibiotics ; Bioselection ; Fish diseases ; Disease control ; Medicine ; Bacterial diseases ; Fish 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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    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
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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
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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
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    Incidence of parasitic infestation on the skin and gills of Clarias gariepinus (Burchell) reared under different culture systems (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24091 | 19325 | 2018-05-12 14:38:25 | 24091 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A total of 140 fish samples of Clarias gariepinus comprising of 20 fry from two hatcheries, 60 fingerlings and 60 adults reared under the water recirculating, water flow-through and the earthen pond culture systems, were clinically examined for presence of ecto-parasites on the skin and the gills. The ectoparasitic fauna observed comprises of 3 protozoans including Trichodina sp, Costia sp and Epistilis sp, and 4 metazoans of which 3 are monogenetic trematodes including Gyrodactylus sp, Dactylogyrus sp and Cleidodiscus sp. The fourth metazoan is a leech; Piscicola sp. Infestation due to Trichodina sp and the monogenetic trematodes were observed in all developmental stages of C. gariepinus and under all the culture systems studied. The highest incidence rate of 100% Trichodina sp infestation was observed on both the skin and the gills of the fingerling stage. The highest parasitic load of 10 organisms per field was also observed on the skin of the fingerlings reared in the earthen pond. Infestation due to monogenetic trematodes was observed to be highest (70%) on the skin of fingerlings reared under the water flow through system, while in the earthen pond system, the incidence rate of 60% was observed for both the fingerlings and the adult fish. Costia sp was observed in all the 3 culture, s;ystems, with the highest incidence of 50% and parasitic load of 2. 5 organisms per field recorded on both the fry and the skin of the fingerlings reared in earthen pond. The incidence of Epistilis sp infestation on the gills of catfish fingerlings reared in the water recirculating system was observed to be low (5%), while Piscicola sp infestation was observed only on the skin of adult C. gariepinus at an incidence rate of 35%, but with a high worm burden of 15 organisms per fish. The fingerlings seem to be more susceptible to Trichodina sp and the monogenetic trematodes, especially under the earthen pond culture system. Catfish hatcheries, especially those producing fingerlings in the earthen ponds must ensure adequate and efficient hygiene practices. They may also need to disinfect their stock appropriately at harvest, prior to distribution to farmers to avoid spread of para sites.
    Description: Includes: 6 tables and 6 figures;Also includes: 45 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Heterobranchus longifilis ; Heterobranchus bidorsalis ; Nigeria ; freshwater environment ; Fish ; Parasites ; Infestation ; Skin ; Gills ; Fish culture ; Recirculating systems ; Fish ponds ; Fingerlings
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    Isolation of Coccidia oocyst from catfish (Clarias gariepinus) raised in plastic tanks in Sabon Gari local government area of Kaduna State (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24092 | 19325 | 2018-05-16 14:12:34 | 24092 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper reports detection of coccidia oocyst from twenty five Clarias gariepinus raised in plastic tanks in Sabon Gari, LGA in Kaduna State. Using simple floatation technique, oocysts were recovered from the intestinal content and gills of Clarias gariepinus. Oocyst number varied from 9 -15 oocysts per slide viewed at x 10 optical magnification of the microscope with the intestines having the highest occurrence. The fish were anorexic and lethargic and post-mortem examination of the dissected fish revealed little or no abdominal fat, pale gills and haemorrhages in the gastrointestinal tract. Forty- eight percent of the examined fish were positive for oocyst. The oocyst was detected more in fish specimen weighing between 240g-300g (58.3%) and length ranging from 28.3cm-30.3cm (66. 7%). The Fulton's condition factor of the infected fish was lower than the uninfected fish. The findings indicate that intestinal Coccidiosis may pose significant health problems in fish; management practices and biosecurity protocols need to be improved.
    Description: Includes:3 tables and 4 figures;Also includes: 19 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Kaduna State ; Coccidia oocyst ; Catfish ; Clarias gariepinus ; Plastic tanks ; freshwater environment ; Oocytes ; Fish culture ; Fish diseases ; Mortality ; Coccoliths
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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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    Role of feed handling in fish farms in Abeokuta, Ogun State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24097 | 19325 | 2018-05-16 13:07:51 | 24097 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study examined fish health status in relation to fish feed handling. Twelve (12) fish farms were randomly selected for assessment of types of fish farms, sources, disease problems associated with fish feeds as well as mode of operation and age of farms in Abeokuta, Ogun State Nigeria. Structured questionnaires were administered for data collection. The fish farms surveyed were categorized into three (3) main groups: farms with less than five (5) fish rearing tanks as small scale production (16. 7%), farms with more than five but less than 10 fish rearing tanks as medium scale production (75%) and farms with above ten (10) fish rearing tanks as large scale production (8.3%). The operational methods were fingerlings production (25%), grow-out (table-size) production (25%) and those involved in the production of both fingerlings and table-size fish (50%). All the farms surveyed utilized compounded rations with only one farm combining compounded rations with natural food (artemia). All the farms experienced different levels of limitations in sourcing for feeds. The types of diseases identified on the farms were bacterial disease, parasitic disease as well as water pollution problem. As regards the duration of feed storage, feeds stored for three months and above suffered more disease problems with increase in water pollution level and presence of parasitic disease, while feeds stored for less than two (2) months experienced only bacterial disease. In controlling the highlighted diseases, farms with brood stock fish adopted only the effort of elimination of water (l00%), those involved in fingerlings used antibiotics and malachite green (50% and 100% respectively), those involved in the production of table-size fish used antibiotics (50%), while those involved in production of both fingerlings and table-size employed 100% water elimination.
    Description: Incudes: 3 tables and 1 figure;Also includes: 8 refs.
    Keywords: Aquaculture ; Nigeria ; Ogun ; Ere Channel ; Fish fish handling ; freshwater environment ; Feed preparation ; Feed ; Fish culture ; Nutrition disorders ; Diseases ; Handling
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    The effects of light and dark exposure on growth response of Clarias gariepinus fingerlings reared in glass aquaria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24101 | 19325 | 2018-05-16 13:24:18 | 24101 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was carried out to determine the effect of light and dark exposures on the growth response of Clarias gariepinus fingerlings. A total of 120 four-week old Clarias gariepinus fingerlings (mean weight 0.52g~c0.02) were stocked into 20 litres of bore-hole water in glass aquarium (60x30x30) cm. Complete light, dark and normal photo periods were the experimental conditions evaluated. Growth indices such as mean weight gain and mean increase in standard lengths were significantly (p〈0. 05) highest in the dark exposure with the following values respectively: (4.19 ~c 0.02g) and (4.11 ~c 0.19cm). Also, percentage survival (82.5%) in the dark exposure was higher than light and control (45% and 70% respectively). Light exposure had higher cannibalism rate (42.5%) than the dark and control (0% and 5 % respectively). Deep shiny black skin colouration was observed among the fingerlings in the dark exposure, while those in the light and control experimental conditions exhibited lighter and normal skin colourations respectively. The experimental conditions were not influenced by the water quality parameters (mean pH: 8~c 0.1 and temp: 28.1 ~c 0.60 ~'C) since their values were within the tolerable limit for fish culture throughout the 42 days experimental period.
    Description: Includes: 4 tables;Also includes: 10 refs.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Maiduguri ; freshwater environment ; Fish ; Growth ; Photoperiodicity ; Experimental culture ; Fingerlings ; Cannibalism ; Survival ; Light attenuation ; Fish culture
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    The socio-economic analysis of small scale fish farmers in Lagos State fish farm estate, Ikorodu, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24100 | 19325 | 2018-05-19 06:34:02 | 24100 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to evaluate the socio-economic analysis of small scale fish farmers in Lagos state fish farming estate in Ikorodu, Nigeria. The primary data were obtained from 60 respondents with structured interview guides and face to face interview, which were selected using simple random sampling techniques. The result revealed that most (88.3%) of the fish farmers are male while (31.40%) are in the active age distribution of 31-40 years, university education (63.0%) and 58.3% were married, 73.4% had a household size that ranged between 3 - 5 persons. Results of the descriptive analyses and tests of significance however showed that there was a significant relationship between socio-economic characteristics and constraint of fish farmers in the estate, there is also a significant relationship between income of fish farmers and constraints of the fish farm enterprise. Implications of these findings were critically-examined, and pertinent recommendations were proffered based on the salient findings in the study.
    Description: Includes: 6 tables and 1 figure;Also includes: 17 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Lagos ; Farm estate ; fish farming enterprises ; Ikorodu ; Small scale ; Socio-economic ; Nigeria ; freshwater environment ; Fish culture ; Artisanal fishing ; Socioeconomic aspects ; Evaluation ; Aquaculture
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    Utilization effects of substituting maize with graded levels of ripe and unripe banana (Musa sapientum) peels in the diet of African catfish (Clarias gariepinus) juveniles (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24102 | 19325 | 2018-05-16 13:27:19 | 24102 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Six diets were produced using graded levels of banana peels (5 %, 10 % and 15 % for both ripe and unripe banana peels) which were compared with the controlled diet containing maize in the diet of C. gariepinus juveniles. Feeds were fed to triplicate groups of ten fish each to satiation twice daily for ten weeks. There were significant differences (p 〈 0.05) in Mean Weight Gain (MWG) and Specific Growth Rate (SGR) amongst the experimental diets. The control diet had the highest MWG (58.40~c 5.27g) and SGR (1.877~c 0.09 %) while the least values of MWG (25.03 g) and SGR (0.35 %) were recorded in Diet 3(15 % unripe banana peels). The Feed conversion ratio, Protein efficiency ratio and Protein intake recorded significant differences (P 〈 0.05) between the control and the experimental diets. Similarly, significant differences (P 〈 0.05) were recorded in Profit Index, Incidence of Cost and Economic Investment Cost Analysis between the control and experimental diets. Histometry analysis of fish organs equality recorded significant differences (P 〈 0.05) between the control and other test diets. Although the Control diet had the best growth performance, it recorded the least profit index (1.87) while Diet 2 (10 % ripe banana) had the highest Profit Index (3.11). Hence, graded levels of plantain peel is a profitable alternative energy source for partial replacement of maize up to 10 % ripe and unripe banana peels in diet of C. gariepinus.
    Description: Includes: 4 tables;Also includes: 22 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Lagos ; freshwater environment ; Fish ; Feeding experiments ; Fish culture ; Nutritional requirements ; Utilization ; Byproducts ; Energy resources ; Nutrients (mineral)
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    Potential impact of climate change on fisheries and aquaculture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24584 | 19325 | 2018-05-20 15:57:28 | 24584 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Climate change will have significant impacts on Nigeria's freshwater and marine aquatic systems. and hence on the countries fisheries and aquaculture. Fisheries and aquaculture are highly vulnerable to changes in weather pattern. and the impacts, which could be negative or positive, will vary from the coastal areas to the drier northern parts of the country. Elevated water temperalures will affect fish physiological processes, thereby affecting spawning. survival of the juveniles, recruit into the exploitable phase of population, population size, production and yield. The impacts of increased flooding of the freswater bodies will be negative through erosion of watershed, destruction of fish feeding and breeding habitats, decrease in primary productivity and alteration of the normal resilience of the aquatic systems, or positive in expansion of aquatic habitats for primary and fish productions especially during the dry season. Drought will exacerbate draw down of the lakes and reservoirs, and insufficient flow in the river hasins for spawning and primary pro duction thereby affecting fish production. Rise in the water level of the Atlantic ocean will lead to intrusion of more salty wafer into The river delta areas, and inundation of the coastal low-lying areas, thus affecting distribution of both the freshwater and marine fishes as a result of changes in the physical and chemical properties of the waters. The impacts will ultimately affect fish population, production and supply, thereby affecting the livelihood of over 26 million people engaged in the primary and secondary sectors of the fisheries industry, as well as food security of the country. The adaptation and mitigation strategies will be based on the peculiar characteristics and interactions of fisheries and aquaculture within the framework of feasible policy instruments. Strategies and policy measures need to be evolved to combat the observable and projected impacts of climate change on fisheries and aquaculture, in order to protect the livelihoods of the fishing communities and food security.
    Description: Includes: 13 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Fisheries ; Nigeria ; Climate change ; Fisheries ; Aquaculture ; Impacts ; Mitigation ; Food security ; freshwater environment ; automation
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    Fecundity, gonadosomic index and spawning period of Chrysichthys nigrodigitatus of the Lower Cross River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24629 | 19325 | 2018-05-22 06:30:19 | 24629 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The estuarine catfish, Chrysichthys nigrodigitatus, is a prized food fish in Nigeria especially in the Niger Delta region. There is a growing concernrn over the sustainability of the fishery in the face of climate change and environmental variability. Studies were conducted on the fecundity, gonadosomatic index and the spawning period of the species. The objectives were to determine the average fecundity of the species and to use the gonadosomatic index to determine its spawning period with the aim of proffering management advice and prerequisites of the species in the face of climate change. A total of 44 females and 40 males were used for the study which spanned the period from May 2011 to April 2012. The fecundity of the species ranged from 3,730.5 eggs to 41,535.9 eggs. There was correlation between the total fecundity and fish weight (p~,01, r= 0.80, n= 44). The regression model for the relationship was expressed as fecundity = 4660.8+4.76 weight. The gonadosomatic index was highest in the month of May and dropped sharply in june signifying that spawning in Chrysichthys nigrodigitatus starts around this period. The implications of these findings in respect to sustainability of the species, and its aquaculture in the face of climate change are discussed.
    Description: Includes: 14 references.
    Keywords: Fisheries ; Atmospheric Sciences ; Chrysichythys nigrodigitatus ; Nigeria ; Lower Cross River ; C. nigrodigitatus ; Reproduction ; Climate change ; Cross Rivber ; Sustainability ; freshwater environment ; automation
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    Fisher folk's response to climate change in New Bussa and its environs of Kainji Lake Basin, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24661 | 19325 | 2018-05-27 14:57:38 | 24661 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study examined fisher folk responses to climate change in Kainji lake basin. The sample comprises of fisher folks within and New Bussa. Eighty questionnaires were administered to obtain the primary data and analysed using descriptive and inferential statistical tools. The results revealed that majority (70%) of the respondent were male, however (61.2%) of them had tertiary education. Majority (60%) of the respondents were aware of changes in climate in the area. Majority (65%) and (55%) of the respondents were involved in incidence of deforestation and charcoal production respectively. In conclusion, it was discovered that little knowledge about climate change and its effects were found among fisher folk. Therefore it recommends that sensitization workshops/lectures be done to enable the fisher folk have adequate knowledge on climate change and the implications on fisheries activities in the basin.
    Description: includes: 11 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Climate change ; Fisher folk ; Fishing community ; Awareness ; 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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    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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    Isolation, identification and characterization of Lactobacillus species from fermented locust bean (Parkia biglobosa) for use as probiotics in the aquaculture industry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24166 | 19325 | 2018-05-13 18:40:22 | 24166 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Probiotics are a promising feed additive to stimulate animal growth and secure a low disease response in aquaculture industry where there are high stocking densities in shrimp and fish production. Fermented locust beans (Parkia biglobosa) are known to be rich in protein and used as food condiment. Probiotic bacteria were isolated from this locally available food material. Culture and characterizations of isolates were carried out. Sugar fermentation patterns were determined by using an API 50 CHL system and incubation were performed anaerobically at 37~'C. MRS broth culture grown at 37~'C overnight was added to 9ml of MRS Agar and the bacteria were incubated at 37~'C for 24 and 48 hrs. Discrete and single colony of lactobacillus was isolated using colony morphology and biochemical tests. The most significant viable taxa isolated was Lactobacillus fermentum at a pH range of (3.0-8.0), while the least viable taxa isolated was Leuconostoc mesenteroides ssp. Microscopically they were Grampositive, rod shaped, non- motile, catalase negative and absence of Endospore.
    Description: Includes: 2 tables and 2 plates.;Also includes: 15 references.
    Keywords: Aquaculture ; Nigeria ; Lagos ; Locust bean ; Probiotics ; Lactobacillus ; Probiotics ; freshwater environment ; Feed ; Additives ; Aquaculture ; Microorganisms ; Bacteria ; Disease resistance ; Fermented products ; Fish culture ; Shrimp 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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    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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    Effect of using plant - Rosa-sinensis' extracts and Methyltestosterone in a fry diet for Oreochromis niloticus (L.)'s growth, survival and sex ratio (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23240 | 19325 | 2018-03-18 15:22:14 | 23240 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The effectiveness of plant extracts (PE) and Methyltestosterone (MI) for male production and growth promotion in Oreochromis niloticus were studied in concrete tanks for 60 days. Fry were fed at two feeding levels, initially 20% and later 10% of body weight dally with diet treated with 60mg/kg. Tilapia treated with MT for 60 days attained an average weight of 10.13~c1.32g, those treated with PE attained an average weight of 11.15~c0.55g compared to 6.95~c0.32g for untreated (control) fish reared under similar conditions. The percentage of males among the untreated tilapia was 39.28%, 68.75% for PE fed tilapia, more than 88.88% of the tilapia in MT treatment group were male. The experiments demonstrated that the anabolic and sex reversal effects of MT on tilapia are proportional to the duration of treatment and quantity of hormone administered Histological sections of the testes of fry fed MT and P E diets showed deformed, clustered, swollen nuclei. Higher concentrations of MT and PE can be used to control prolific breeding and increase yield in fish production.
    Description: Includes:- 4 tables.;2 figs.;11 plates.;20 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Rosa-sinensis ; Methyltestosterone ; freshwater environment ; Feeding experiments ; Fish culture ; Diets ; Aquatic plants ; Histology
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    Influence of dietary palm oil on growth and carcass composition of Heterobranchus longifilis (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23250 | 19325 | 2018-03-25 14:30:49 | 23250 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Supplies of marine fish oil (FO) are limited and continued growth in aquaculture production dictates that substitutes must be found that do not compromise fish health and growth. This study investigated the suitability of palm oil (PO) as a replacement for FO (cod liver oil) in diets of H longifilis. Triplicate groups of H longifilis fingerlings were fed five practical-type diets in which the added lipid was either 100% FO and 0% PO; 75% FO and 25% PO; 50% FO and 50% PO; 25% FO and 75% PO; or 0% FO and 100% PO for 8 weeks. There were no significant effects of diet on growth rate or feed conversion ratio. Lipid deposition was highest in the liver of fish fed 100% PO. No significant differences were observed between dietary treatments for moisture, protein and ash content in H. longifilis fingerlings. This study suggests that PO can be used successfully as a substitute for cod liver oil in diets for H. longifilis.
    Description: Includes:- 3 tables.;24 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; freshwater environment ; Diets ; Nutritional requirements ; Nutritive value ; Growth rate ; Feeding experiments ; Experimental culture ; Fish culture ; Carcasses
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    Nutritional deficiency presiding to disease conditions in cultured fish (2021)
    FISON | Kaduna
    In:  http://aquaticcommons.org/id/eprint/23282 | 19325 | 2018-03-28 15:58:53 | 23282 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: It is when fish are confined and fed supplemental feeds that nutritional deficiency symptoms occur. Only complete understanding requirement of cultured organisms will allow the feed manufacturer or culturist to provide adequately for the species under culture. The nutritional deficiencies are reviewed as absolute and non-absolute terms. The review concluded that deficit are interwoven and usually not limited to inadequacy or non inclusion of a certain feed ingredient especially for aquatic animals.
    Description: Includes:- 17 refs.
    Keywords: Aquaculture ; freshwater environment ; Fish culture ; Fish diseases ; Nutrient deficiency
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    Effects of enclosure colour on growth performance of Clarias gariepinus fry (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23325 | 19325 | 2018-04-06 16:01:51 | 23325 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of five enclosure colour on the production of Clarias gariepinus fry at post- yolk absorption stage were examined in the indoor hatchery during the first phase of exogenous feeding. A total of 3600 C. gariepinus fry (mean weight, 6.3 ~c 0.00 mg) were stocked into 15,56 litres capacity laboratory plastic bowls. Tank colours evaluated were black, blue, green, white and maroon. Frys were fed on zooplankton ad-libitum. Results indicated that tank colour had significant impact (P〈0.05) on the weight of C. gariepinus fry. However, percentage survival was significantly higher (P 〈 0.05) in black (86.67 %) than in white and maroon (56.67% and 66.67 % respectively). Survival in the black tanks ( 86.67 %) was not significantly different ( P 〉 0.05) than the blue and green tanks treatments but was significantly higher ( P 〉 0.05) than the blue and green tanks treatments. Based on the results, it is obvious that the background enclosure colour has effects on the growth and survival of fry in the indoor rearing system. A general tendency of higher fry growth and survival in dark colour backgrounds was evident. This could have a significant financial impact on commercial fingerlings production of C. gariepinus as fish hatchery operators in Nigeria do not currently take into consideration the colour of tanks use for the rearing of fry in the indoor hatchery.
    Description: Includes:- 3 tables.;10refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Fish culture ; Growth rate
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    A review of essential checklists for fish cage culture (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23329 | 19325 | 2018-04-06 16:07:55 | 23329 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Nigeria has potentials for high production of fish from her water bodies. Fishing is the predominant means of fish supply that needs to be increased by fish fanning in different enclosures. Cage aquaculture is possible in several existing water bodies. The essential inputs for a successful fish cage farming therefore need to be considered. This would be an added wealth creation for job seekers/farmers hitherto involved in traditional fishing.
    Description: Includes:- 14 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Cage culture ; Aquaculture techniques ; Cages ; Fish culture
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    The growth performance and survival of Clarias gariepinus fry raised in homestead concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23421 | 19325 | 2018-04-25 19:22:53 | 23421 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Fertilizer application in earthen ponds has been used as a low-cost method of sustainable aquaculture production. This study was carried out to investigate the growth response of African Catfish fry Clarias gariepinus (Burchell, 1882) in three different culture media in Homestead concrete tanks. The water in the control (T1) was not treated while T2 and T3 were treated with poultry droppings and soy bean milk filtrate respectively. Nine hundred (900) catfish fry weighing averagely 0.67 ? 0.69g were randomly allocated per treatment. In each tank (2m x 3m x 1.5m) were suspended (3) net cages each (1m x 1m x 1m). Each net cage had 100 fry. The fish in tank 1 (control treatment) were fed fish meal from the start at 5% of their body weight four times daily while the other treatments were not fed at all for the first 7 days. Feeding with fishmeal commenced for treatments T2 and T3 on the next 8 ? 14 day. The weights of the feed were adjusted after weekly weighing Analyses of the culture media for phytoplankton composition and water quality parameters were done for all treatments at the end of the experiment. Tables 3 and 4. The culture media with poultry manure (T2) and soyabean filtrate (T3) were found to influence the quality and quantity of the plankton which in turn determined the growth and survival. Tables 1 and 2. However, the best weight increase was recorded in T1 (2.33g) followed by T3 (1.89g) and then T2 (1.81g) had the lowest weight gain. The survival rates in all the treatments were high but was highest in T3 (98%) followed by T2 (97%) and T1 (95%). Dissolved oxygen, pH and temperature of culture media were variously affected by the treatments. The presence of zooplanktons (Rotifer and Daphnia species) invariably supported the highest survival (98%) of the fry in treatment T3. Treatment T3 (11.56 ~c 1.14) x 103) generated higher concentrations of most of identified zooplanktons than treatments T1 (5.39 ~c 0.73) x 103) and T2 (12.78 ~c 0.98) x 103). These zooplanktons were absent in treatments T1 and T2. The result indicated that fertilizing the culture medium using soybean milk filtrate or poultry droppings improved the growth and of C. gariepinus.
    Description: Includes:- 4 tables.;18 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Ibadan ; freshwater environment ; Fish culture ; Growth rate ; Growth ; Survival ; Food organisms
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    Stress, neuro-endocrine cascade and fish broodstock quality (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23431 | 19325 | 2018-05-02 08:07:50 | 23431 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A review of the effect of stress on broodfish quality was done. Ideally, fish should be maintained under controlled conditions which, as far as possible, match or improve upon those to which the fish would have been exposed in the wild or controlled culture medium. In practice, however, the management of the rearing conditions-water quality, feeding regime and diet, stocking density, exposure to pathogens, genetic engineering and handling parameters may all create stress. When such stress is applied to a broodfish, it elicits a series of neuroendocrine responses, which if prolonged, can result in cortisol levels rising significantly above the baseline. Consequently, the health of the brood fish and the viability of the progeny are affected. Farmers and breeders are therefore advised to pay special attention to the nutrition and proper handling their broodstock.
    Description: Includes:- 2 figs.;6 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Biological stress ; Neurophysiology ; Physiology ; Fish culture ; Reproduction ; Fish physiology
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    Water recirculating aquaculture systems: management by-pass and trouble shooting (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23432 | 19325 | 2018-05-02 08:08:49 | 23432 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Water Recirculating Aquaculture system (WRAS) as a culture system can be simply configured to combine both mechanical and biological filteration mechanism. This system can be regarded as a fish factory being an intensive culture technology system with high-density stocking and carrying capacity. Recirculating systems has some production advantages over other culture systems especially in intensive production. This production system achieves good and stable water quality management and enables the farm manager to trouble shoot as management protocol is easier to determine in a more business manner. Challenges in running this system in Nigeria include poor design, irregular power supply alter failure, high cost of quality feed, poor water quality management and high cost of water quality kits. Similarly, unavoidable continuous daily stress on fish stocked, low biosecurity understanding and lack of expertise coupled with inadequate financing are common issues in running this system. Therefore, necessary by-pass protocols become necessary in the management of this system in Nigeria for profitable production.
    Description: Includes:-1 fig.;15 refs.
    Keywords: Aquaculture ; Nigeria ; Recirculatory aquaculture system ; freshwater environment ; Aquaculture ; Freshwater aquaculture ; Fish culture
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    Collection and maturation of broodstock of the black tiger shrimp Penaeus monodon (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23391 | 19325 | 2018-04-12 07:12:03 | 23391 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Forty (40) broodstock of the black tiger shrimp, Penaeus. monodon, comprising of 16 males and 24 females were collected between November and December 2008 from three Nigerian Fishing Companies namely Karflex Fisheries Nigeria Limited, Honeywell Fisheries and ORC Nigeria Limited. The body weight ranged from 72.5 to 300g, total length from 24.0-34.0 cm and carapace length from 8.0-24.5cm. Abdominal length ranged from 10.3 - 16.0 cm, and telson length from 3.0-5.7cm. The stages of ovarian development ranged between 0 and 3.5 while the percentage of sperm carried by the females ranged from 0 to 100%. The broodstock were stocked in the maturation tanks in the Nigerian Institute for Oceanography and Marine Research shrimp hatchery and fed on squid to enhance gonadal development and maturation. Spawning of P. monodon was successfully carried out three times with an estimated production of one to two million nauplii at each spawning. Three hundred and twenty (320) post larvae (PL30) were stocked in concrete tanks for broodstock development. The post larvae have presently attained juvenile stage with average body weight of 16.01g. The availability of broodstock of P. monodon in Nigerian coastal waters will ensure successful hatchery production of post larvae for stocking of ponds leading to the development of shrimp farming.
    Description: Includes:- 2 figs.;21 refs.
    Keywords: Aquaculture ; Penaeus monodon ; Nigeria ; Lagos ; freshwater environment ; Fish culture ; Shrimp culture
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    Growth of two tilapias in floating plastic cages (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23403 | 19325 | 2018-04-12 08:53:33 | 23403 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A growth trial of Oreochromis niloticus and Sarotherodon galilaeus fingerlings in floating plastic cages was carried out for 180 days. O. niloticus (mean wt., 75 ~C 0.50g) and S. galilaeus (mean wt., 36.40~c 1.80g) were stocked at 250 fish fingerlings/m3. The study was conducted in four 2x2xl m plastic cages with two replicate cages for each treatment. A 25% protein balanced diet was used as feed. The mean weight gain ranged from 0.33 to 0.91g/day while the mean final weight ranged from 60.0g to 162.00g for O. niloticus and S. galilaeus, respectively. Total fish production ranged from 15.90 to 16.00kg/m3. The highest survival (100%) was obtained in 0. niloticus while the lowest (98.4%) was obtained in S. galilaeus. The major constraint in the study was the inadequacy of suitable fingerlings size for stocking the plastic cages.
    Description: Includes:- 3 tables.;8 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Sarotherodon galilaeus ; Nigeria ; Kigera L. ; freshwater environment ; Fish culture ; Cage culture
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    The anaesthetic effects of clove seed in selected species of grey mullets, Liza falcipinnis and Liza grandisquamis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24225 | 19325 | 2018-05-19 07:13:31 | 24225 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The anaesthetic effects of Clove Seed extract in two species of grey mullets Liza falcipinnis and Liza grandisquamis were assessed. A total of 120 of these species comprising 60 L. falcipinnis with 30 each of fingerlings (mean length 9.86cm ~c l.ll SD: mean weight 21.20g ~c 2.10 SD) and juveniles (mean length 17.24cm ~c l.88 SD; mean weight 66.24g ~c 4.24SD) and 60 L. grandisquamis also consists of 30 each of fingerlings (mean length 10.24cm ~c 1.92 SD; mean weight 23.41 ~c 2.21 SD) and juveniles (mean length 18.21cm ~c SD; mean weight 71.21g ~c 4.12 SD) were Sampled from the recruitment ponds at African Regional Aquaculture Center, (ARAC), Buguma, Rivers State and were exposed to clove seed extracts at different concentrations of 0.0mglL (control), 5.0, 10.0, 15.0, 20.0 and 25.0mglL. The results obtained indicated a size related response to Clove seed extracts. The induction time in both species were found to decreased significantly (P〈0.05) as the concentrations of the clove extracts increased with the shortest induction time 55.61(s) observed in fingerlings of L. grandisquamis, while the longest 210.61(s) was recorded in juveniles of L. falcipinnis. However, the recovery time increased significantly with increasing concentration of the clove seed, with the highest recovery time 350.11(s) observed in L. falcipinnis at 25.0mglL concentration and the lowest 246.91(s) in L. grandisquamis at 5.0mglL concentration of the clove extracts, with the optimum dosage of 10.0mg/l and 15.0mg/l of fingerlings and juvenile sizes respectively. Interestingly, the survival of the exposed fish during the trial was 100% in both sizes of the two species. No mortality was recorded in all concentrations of the plant extracts. The findings of this trials indicated that clove seed extracts was effective, producing minimum stress and zero mortalities and therefore can be recommended as an effective anaesthetic for use in aquaculture.
    Description: Includes: 27 references.
    Keywords: Aquaculture ; Liza falcipinnis ; Liza grandisquamis ; Nigeria ; Rivers State ; Anaesthetic ; Clove ; Seed mullets ; aquaculture ; brackishwater environment ; Anaesthetics ; Seeds ; Brackishwater fish ; Juveniles ; Fish ponds ; Recruitment ; Size ; Comparative studies ; Aquaculture techniques ; Fish ; Biological stress ; Fingerlings ; Fish culture
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  • 81
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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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  • 82
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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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  • 83
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    Flotation, growth, food utilization and economic evaluation of Oreochromis niloticus fingerlings on Lemna paucicostata diets (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23234 | 19325 | 2018-03-18 15:09:44 | 23234 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The inquisition into feed flotation has led to the bio-chemical combination of some conventional feedstuffs with Duckweed Lemna Paucicostata meal fixed at 0, 4, and 8 percent in iso-nitrogenous 30% crude protein, iso-caloric 37 kcal/g diets for Oreochromis niloticus fingerlings mean weight ranged 21.00 21.50g in a fifty-six day feeding trial. Significant (P〈0. 05) feed flotation were obtained at 4 and 8% over 0% Lemna inclusion. There were no significant differences (p〉 0.05) in growth food utilization and survival of fish in all diets. The Cost evaluation and Feed Conversion Efficiency were positive in 8% Lemna diet than the whole artificial feed. However, because of the positive imparts on tilapia culture, Duckweed meal was recommended up to 8% inclusions in diets for tilapia fingerlings.
    Description: Includes:- 3 tables.;2 figs.;24 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Lemna paucicostata ; Nigeria ; New Bussa ; Floating feeds ; freshwater environment ; Feeding experiments ; Feed composition ; Feed efficiency ; Nutritional requirements ; Fish culture ; Diets
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  • 84
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    Effect of stocking density on the growth rates of Clarias gariepinus in a floating hapa system (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23233 | 19325 | 2018-03-18 15:08:08 | 23233 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Any aquaculture system needs constant supply of good quality water. In the arid zone of Nigeria this problem becomes more acute. This study therefore tries to rear fish is enclosure (net-hapas) suspended in outdoor concrete tanks to maximize the use of water and feed. About 350 fingerlings (of mean weight of 4.93g) of Clarias gariepinus caught in the same locality in Lake Alau ( Maiduguri, Borno State) were stocked in net-hapas (1 x 1x 1 m) at 25,50 and 100 fish/m3. Each treatment was duplicated the fish were fed three times a day on a formulated 40% protein balanced diet at 5% body weight per day. Batch weighing of the fish in each net-hapa was carried out every fortnight for body weight measurement. Water quality parameters such as dissolved oxygen, pH and temperature were measured weekly. The results of the fish growth and feed utilization efficiency were pooled for each treatment, computed and analyzed using one-way-analysis of variance (ANOVA) Mortality was highest in treatment 3 (100/m3) when compared with treatments I and 2 (25/m3 and 50/m3 respectively). This is mainly due to handling stress because of the long distance from Lake Alau 10 the NIFFR Zonal Station outdoor ponds (〉45km) and the method of capture (Cast net). There were slight differences in mean final weight and food conversion of the fish at the end of the study but no statistical differences were found among the treatments (P〈0. 05).
    Description: Includes:- 3 tables.;7 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Maduguri ; freshwater environment ; Stocking density ; Fish culture ; Growth rate ; Cage culture
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  • 85
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    Production of all male fingerlings through feeding of androgenic steroid (Mesterolone) in the diet fed as first food to tilapia Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23252 | 19325 | 2018-03-25 14:35:14 | 23252 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Non-conventional hormone, Androgenic Steroid (mesterolone) was prepared and incorporated (using ethanol) at various concentration of 0mg, 30mg, 40mg, 50mg, 60mg each in 0.2kg of fish meal. The six levels were replicated 3 times in plastic tanks. The fish meal incorporated with hormone (mesterolone) were fed as first food to 7 -day old fry of Oreochromis niloticus for 28 days after which the tilapia fry were fed on ordinary fishmeal for another 8 weeks. At the 9th and 12th weeks and after feeding with the hormone, the number of survivals and the weights gained were recorded! After the 12week, the males and females were separated using hand-magnifying lens. The economic viability of all male production using non-conventional hormone (mesterolone) was calculated. Hormone fed to O. niloticus was found to have no significant effect (P〉0. 05) on the survival and the mean weight gain of the O. niloticus. But the hormone fed had great influence on the female: male ratio i.e. treatment difference was highly significant (P〈0.01). Tilapia fry fed with 40mg/0.2kg feed was found to have the largest percentage of males 97% while those fed with 30mg/0.2kg, 50mg/0.2kg, 60mg/0.2kg and 70mg/0.2kg had 51%,91%,86%,89%, and 80% males respectively.
    Description: Includes:- 3 tables.;1 Fig.;15 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Ibadan ; freshwater environment ; Breeding ; Fish culture ; Sex hormones ; Diets ; Sex ratio ; Sex reversal
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  • 86
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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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  • 87
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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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  • 88
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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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  • 89
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    Proximate composition and some mineral elements of horse radish (Moringa oleifera) seedmeal (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24212 | 19325 | 2018-05-19 06:46:12 | 24212 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Proximate composition of Horse radish (Moringa oleifera) Seeds meal was investigated. Standard analytical methods were used to determine the nutritive value; Na and K were estimated using framephotometer, Ca , Mg and P were determined titrimetrically. The results (in g/100g sample) obtained were (7.67%) moisture, (3.56%) ash, (23.75%) crude lipid, (1.16%) fiber, (40.23%) crude protein and (23.50%) carbohydrate. The meal is rich in K (1775mg %), Na (61.23mg %), Ca, Mg and P were 0.33mg%, 0.60mg% and 3.24mg%. Moringa oleifera seed meal could therefore be considered as potential rich sources of nutrient to supplementing plant based diets in aquaculture.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Ecology ; Nigeria ; Sokoto State ; Moringa plant ; freshwater environment ; Seeds ; Nutritive value ; Chemical analysis ; Flora ; Water content ; Proteins ; Fish culture ; Diets
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  • 90
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    Estimated un-ionized ammonia at small incremental pH value and temperatures: practical option for fish farmers (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24235 | 19325 | 2018-05-20 05:20:54 | 24235 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Ammonia as the primary product of nitrogen metabolism causes mortality due to ammonia toxicity produced in a culture system. Effect of pH and Temperature was calculation and expanded using the acid dissociation constant (pka) for equation: pka = 0.09018+ 2729.92/T. Ammonia values (f) expressed in percents for intervals of 1.0 degree from 0 - 30~'C and pH increasing from pH 6-10 where T is the Temperature and acid dissociation constant (pka). Ammonia (f) was calculated using the equation: f= 1/(10pka-pH+1).Small increments of 0.5 were considered from pH values of 3.0 - 7.0 for Temperature range of 20 - 34~'C as experienced now in most farms in Lagos. Casio scientific calculator fx-82TL (12 Digits) with four significant figures was used for the calculation. The acid dissociation constant (Pka) calculated for 31-34~'C was 9.0702, 9.0407, 9.0115 and 8.9824 respectively. pH and Temperature can be monitored and used for ammonia estimation by cross-marching with the extended pH -Temperature Emerson monogram. This will show the estimated ammonia as observed for pH and Temperature at pH 6.0 - 7.0. The use of this management protocol (Monogram) will reduce mortality in culture systems serving as a prompt management tool for fish farm operation. The understanding of the usage of this monogram will reduce the cost of production usually necessitated by non availability and high cost of imported water quality, which many farmers cannot afford.
    Description: Includes: 12 references.
    Keywords: Aquaculture ; Nigeria ; Lagos State ; Ammonia ; Acid dissociation constant ; (pksuba/sub) ; pH ; Temperature ; marine environment ; Ammonia ; Nitrogen ; Metabolism ; Toxicity ; pH effects ; Acidity ; Fish culture ; Monitoring ; Baseline studies ; Mortality ; Reduction ; Temperature tolerance
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  • 91
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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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  • 92
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    Effect of processing methods on the proximate composition of Gmelina arborea seed (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24216 | 19325 | 2018-05-19 06:54:43 | 24216 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study examines the proximate composition of nutrients in Gmelina arborea seed using two processing method (toasting and cooking). The seed was soaked accordingly to eliminate the anti nutritional factors present in it. The seeds was later air-dried and divided into seven samples each weighing 300g. Three samples were toasted using electric heating thermostart oven for 5mins, 10mins and 15mins and labelled T1, T2 and T3 respectively. Another three (3) samples were cooked using pressure pot for the same duration and labelled T4, T5 and T6 respectively. The seventh sample (T7) serve as the controlled unprocessed. The samples were milled and subjected to proximate analysis. The toasted samples had the same crude protein content of (16.36 ~c 0.00%) With no significant difference (P〈0.05%), there was significant difference among the cooked samples with (7.62 ~c 0.02%, 10.78 ~c 0.01% and 12.37 ~c 0.01%) the least crude protein was found in unprocessed sample. The crude protein was found to increase as the cooking time increases. This study showed that toasted and cooked Gmelina arborea seed would serve as good source of fish feed and could be used as a source of energy for improved feed utilization efficiency.
    Description: Also includes: 11 references.
    Keywords: Aquaculture ; Gmelina arborea ; Nigeria ; Niger State ; Gmelina arborea seed ; Proximate composition ; Phytate ; freshwater environment ; Nutrition ; Chemical composition ; Seeds ; Food technology ; Feed efficiency ; Utilization ; Fish culture ; Product development
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  • 93
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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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  • 94
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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
    Repository Name: AquaDocs
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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
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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
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    Lessons from the breeding program on common carp in Hungary (2021)
    WorldFish Center | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/2597 | 115 | 2010-12-14 17:34:45 | 2597 | WorldFish Center
    Details
    Publication Date: 2021-06-25
    Description: Common carp is one of the most important cultured freshwater fish species in the world. Its production in freshwater areas is the second largest in Europe after rainbow trout. Common carp production in Europe was 146,845 t in 2004 (FAO Fishstat Plus 2006). Common carp production is concentrated mainly in Central and Eastern Europe. In Hungary, common carp has been traditionally cultured in earthen ponds since the late 19th century, following the sharp drop in catches from natural waters, due to the regulation of main river systems. Different production technologies and unintentional selection methods resulted in a wide variety of this species. Just before the intensification of rearing technology and the exchange of stocking materials among fish farms (early sixties), “landraces” of carp were collected from practically all Hungarian fish farms into a live gene bank at the Research Institute for Fisheries, Aquaculture and Irrigation (HAKI) at Szarvas (Bakos and Gorda 1995; Bakos and Gorda 2001). In order to provide highly productive hybrids for production purposes starting from 1964, different strains and crosses between Hungarian landraces were created and tested. During the last 40 years, approximately 150 two-, three-, and four-line hybrids were produced. While developing parental lines, methods of individual selection, inbreeding, backcrossing of lines, gynogenesis and sex reversal were used. This breeding program resulted in three outstanding hybrids: “Szarvas 215 mirror” and “Szarvas P31 scaly” for pond production, and “Szarvas P34 scaly” for angling waters. Besides satisfying the needs of industry, the live gene bank helped to conserve the biological diversity of Hungarian carp landraces. Fifteen Hungarian carp landraces are still maintained today in the gene bank. Through exchange programs fifteen foreign carp strains were added to the collection from Central and Eastern Europe, as well as Southeast Asia (Bakos and Gorda 2001). Besides developing the methodology to maintain live specimens in the gene bank, the National Carp Breeding Program has been initiated in cooperation with all the key stakeholders in Hungary, namely the National Association of Fish Producers (HOSZ), the National Institute for Agricultural Quality Control (OMMI), and the Research Institute for Fisheries, Aquaculture and Irrigation (HAKI). In addition, methodologies or technologies for broodstock management and carp performance testing have been developed. This National Carp Breeding Program is being implemented successfully since the mid-1990s.
    Keywords: Aquaculture ; Biotechnology ; Genetics ; Genetic drift ; Genetic diversity ; Fish culture ; Brood stocks ; Induced breeding ; Breeding success ; Research programmes
    Repository Name: AquaDocs
    Type: book_section
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    Maintaining the "public good" nature of improved fish strains: dissemination of knowledge and materials (2021)
    WorldFish Center | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/2600 | 115 | 2010-12-14 17:34:51 | 2600 | WorldFish Center
    Details
    Publication Date: 2021-06-26
    Description: Many sources of information that discuss currents problems of food security point to the importance of farmed fish as an ideal food source that can be grown by poor farmers, (Asian Development Bank 2004). Furthermore, the development of improved strains of fish suitable for low-input aquaculture such as Tilapia, has demonstrated the feasibility of an approach that combines “cutting edge science” with accessible technology, as a means for improving the nutrition and livelihoods of both the urban poor and poor farmers in developing countries (Mair et al. 2002). However, the use of improved strains of fish as a means of reducing hunger and improving livelihoods has proved to be difficult to sustain, especially as a public good, when external (development) funding sources devoted to this area are minimal1. In addition, the more complicated problem of delivery of an aquaculture system, not just improved fish strains and the technology, can present difficulties and may go explicitly unrecognized (from Sissel Rogne, as cited by Silje Rem 2002). Thus, the involvement of private partners has featured prominently in the strategy for transferring to the public technology related to improved Tilapia strains. Partnering with the private sector in delivery schemes to the poor should take into account both the public goods aspect and the requirement that the traits selected for breeding “improved” strains meet the actual needs of the resource poor farmer. Other dissemination approaches involving the public sector may require a large investment in capacity building. However, the use of public sector institutions as delivery agents encourages the maintaining of the “public good” nature of the products.
    Keywords: Aquaculture ; Biotechnology ; Genetics ; Genetic drift ; Fish culture ; Policies
    Repository Name: AquaDocs
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    Breeding programs on Atlantic salmon in Norway: lessons learned (2021)
    WorldFish Center | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/2596 | 115 | 2010-12-14 17:34:43 | 2596 | WorldFish Center
    Details
    Publication Date: 2021-06-25
    Description: An early establishment of selective breeding programs on Atlantic salmon has been crucial for the success of developing efficient and sustainable salmon farming in Norway. A national selective breeding program was initiated by AKVAFORSK at the beginning of the 1970s, by collecting fertilized eggs from more than 40 Norwegian river populations. Several private selective breeding programs were also initiated in the 1970s and 1980s. While these private programs were initiated using individual selection (i.e. massselection) to genetically improve growth, the national program was designed to gradually include all economically important traits in the breeding objective (i.e. growth, age at sexual maturation, disease resistance and quality traits) using a combined family and within-family selection strategy. Independent of which selection strategy and program design used, it is important to secure and maintain a broad genetic variation in the breeding populations to maximize selection response. It has been documented that genetically improved salmon from the national selective breeding program grow twice as fast as wild Atlantic salmon and require 25 per cent less feed, while salmon representing the private breeding programs all show an intermediate growth performance. As a result of efficient dissemination of genetically improved Atlantic salmon, the Norwegian salmon farming industry has reduced its feed costs by more than US$ 230 million per year! The national selective breeding program on Atlantic salmon was commercialized into a breeding company (AquaGen) in 1992. Five years later, several private companies and the AKVAFORSK Genetics Center (AFGC) established a second breeding company (SalmoBreed) using breeding candidates from one of the private breeding programs. These two breeding companies have similar products, but different strategies on how to organize the breeding program and to disseminate the genetically improved seed to the Norwegian salmon industry. Greater competition has increased the necessity to document the genetic gain obtained from the different programs and to market the economic benefits of farming the genetically improved breeds. Both breeding companies have organized their dissemination to get a sufficient share of the economic benefits in order to sustain and improve their breeding programs.
    Keywords: Aquaculture ; Biotechnology ; Genetics ; Genetic drift ; Genetic diversity ; Fish culture ; DNA ; Induced breeding ; Breeding success ; Research programmes
    Repository Name: AquaDocs
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    Policies on release of improved fish strains in China (2021)
    WorldFish Center | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/2599 | 115 | 2010-12-14 17:34:49 | 2599 | WorldFish Center
    Details
    Publication Date: 2021-06-26
    Description: Since 1991, the certification, release and maintenance of new species for aquaculture have become part of the national policy in China. During the past 15 years, this policy has been conducted and improved and has begun to show its significant role in Chinese fisheries. This paper describes the updated system of certification, release and maintenance of new species for aquaculture in China.
    Keywords: Aquaculture ; Biotechnology ; Genetics ; Genetic drift ; Genetic diversity ; Fish culture ; Induced breeding ; Breeding success ; Research programmes ; Policies
    Repository Name: AquaDocs
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