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  • 1
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    An observation on the acquisition or loss of trematode (Clinostomum tilapiae) by Tilapia (Oreochromis niloticus) in culture systems (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23041 | 19325 | 2018-03-05 20:38:04 | 23041 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The acquisition or loss of Clinostomum tilapiae parasites by Oreochromis niloticus was studied. Four groups of 25 healthy fishes were stocked in the upper part of serial experimental ponds, while another four groups of 25 infected fishes were also stocked at the rear part of the serial experimental ponds. All the groups were fed at 3% body weight with the same compounded fish feed. Acquisition or loss of parasites and growth was monitored for a period of six months. The mean relative growth rate was 11.04kg/month for the healthy fishes and 5.62g/month for the infected fishes. The mean specific growth rate was 38.75% and 31.25% for the healthy and infected groups respectively. However the results were not statistically significant (p 〉 0.05). The parasite did not multiply on the host body rather the infection rate reduced from 100% to between 44 and 78%, parasite burden was reduced from an average of 3 per fish to 2.25 while the healthy fish acquired the parasite and the average burden was 2.15. The mean values of the prevailing water quality parameters were within the optimum range acceptable in fish culture systems in the tropics.
    Description: includes:- 1 table.;9 refs.
    Keywords: Aquaculture ; Ecology ; Nigeria ; Ibadan ; freshwater environment ; Parasites ; Parasitic diseases ; Infectious diseases ; Fish diseases
    Repository Name: AquaDocs
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    Format: 296 - 298
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  • 2
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    Profitability of an economic diet in practical fish farming: a case study of vitamin C inclusion in the diet of Heterobranchus longifilis fingerlings (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23036 | 19325 | 2018-03-05 09:16:43 | 23036 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A completely randomised design with three replicates was used for an experiment conducted to study the profitability of vitamin C inclusion into the ration formulation for Heterobranchus longifilis. Six different levels 0, 50, 100, 150, 200 or 250 mg of L-ascorbic acid (vitamin C) kg-1 diet was included in a 42.5% crude protein basal diet and fed to triplicate groups of twenty fingerlings. The groups fed diets with vitamin C had statistically significant (P〈0.05) higher final weight than the group fed the control diet without vitamin C at the end of twenty weeks study, Feed consumed was significantly (P〈0.05) lower in the group fed diet without vitamin C. There was a significant (P〈0.05) difference between the groups fed 0 and 50 mg vitamin C kg-1 diets, but no significant (P〉0.05) difference between the groups fed diets with 100, 150, 200 and 250 mg vitamin C kg-1 diet on this parameter. Mortality was significantly (P〈0.05) higher in the groups fed diet without vitamin C while there was no significant difference (P〉0.05) between the fish fed the diets with respective graded levels of vitamin C. The thiobarbituric acid reactive substance (TBARS) of the liver and whole body of fish was significantly (P〈0.05) higher in fish fed diet devoid of vitamin C. Cost per kilogram of fish base on feed input was significantly (P〈0.05) higher in the group fed diet without vitamin C than those enriched with vitamin C. However, within groups fed with vitamin C cost per kg of fish was significantly (P〈0.05) decreasing in the following order: diet 2〉 diet 6〉 diets 4, 5, and 3. There was no significant difference (P〉0.05) between fish fed diets 3, 4 and 5 with respect to cost per kilogram of fish. This study vividly showed that there is no alternative to the use of a complete diet with vitamin C in an intensive practical farming of H. longifilis geared towards optimum profit maximisation in terms of feed as one of the variable input.
    Description: Includes:-2 tables.;20 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Diets ; Feeding experiments ; Vitamin C
    Repository Name: AquaDocs
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    Format: 270 - 275
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  • 3
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    Growth performance of Clarias gariepinus fingerlings fed cooked breadfruit (Artocarpus altilis) seed meal as replacement for maize in outdoor hapas (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23040 | 19325 | 2018-03-05 20:36:36 | 23040 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The growth performance and nutrient utilization in Clarias gariepinus fingerlings fed cooked breadfruit (Artocarpus altilis) seed meal based diet as a replacement for maize, investigated for 8 weeks. Five (5) diets of breadfruit seed meal substituted for maize at different levels of inclusion (0%; 25%; 50%; 75% and 100%) were fed to the fingerlings at 5% body weight twice daily in hapa of 1m x 1m x 1m. The hapas wee submerged in a pond and each hapa stocked with 20 fingerlings of mean weight of 5.8~c0.00g. Evaluation of growth parameters nutrient utilization of the experimental diets showed that there was no significant difference (P〉0.05) in mean final weight (MFW); specific growth rate (SGR); feed conversion rate (FCR) protein efficiency ratio (PER) and apparent net protein utilization (ANPU) among the treatments. The results suggested a net advantage of replacing dietary maize with cooked breadfruit seed meal for Clarias gariepinus fingerlings at 50% and above levels of inclusion under the condition of the experiment.
    Description: Includes:- 4 tables.;10 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Makurdi ; freshwater environment ; Fish culture ; Feeding experiments ; Growth rate ; Diets
    Repository Name: AquaDocs
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    Format: 292 - 296
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  • 4
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    Evaluation of different soybean-based diets on growth and nutrient utilization of Heterobranchus longifilis in aquaria tanks (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23034 | 19325 | 2018-03-05 09:13:55 | 23034 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: In order to compare the effect of raw, cooked, toasted and extruded soybean meals on the growth and nutrient utilization of Heterobranchus longifilis fingerlings, 120 pure Heterobranchus longifilis fingerlings were purchased at the National Institute for Freshwater Fisheries Research (NIFFR) improved genetic fish hatchery and randomly allocated into four different treatments with two replicates each with 15 fingerlings in 8 aquaria tanks. Four different diets containing 40% crude protein each were compounded and fed to the fish at 5% body weight for 56 days. At the end of the feeding trials, growth performance and nutrient utilization were evaluated. The results revealed that fish fed toasted soybean-based diets had highest mean weight gain (MWG) of 16.39g, specific growth rate (SGR) of 2.03%/day, and food conversion ratio (FCR) of 2.18. The fingerlings fed the extruded soybean-based diet gave the least growth performance. It could be concluded in practice, that toasted soybean-based diet is optimal for growth of Heterobranchus longifilis fingerlings.
    Description: Includes:- 5 tables.;3 fig.;7 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Diets ; Nutritive value ; Feeding experiments
    Repository Name: AquaDocs
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    Format: 255 - 263
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  • 5
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    Analysis of physicochemical characteristics of some freshwater bodies in Essien Udim Local Government Area of Akwa Ibom State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23044 | 19325 | 2018-03-05 20:45:24 | 23044 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The physical and chemical characteristics of freshwater bodies Ikot Ebak and Abeneyentem streams in Essien Udim Local Government Area, Akwa Ibom State, Nigeria were studied from (July December 1996). The mean values obtained in the two water bodies were pH (6.8~c0.12, 6.8~c0.09, respectively). Conductivity (4.9~c2.26, 5.0~c2.09 iScm-1), total dissolved solid (16~c7.58, 37~c26.9 mg/l), TSS (46~c26.0, 53~c53.1)g/l), alkalinity (17.5~c7.27, 10.7~c8S MgCaCo3/1), DO (6.98~C1.46, 8.3~C29.0mg/1), BOD (2.65~c2.44, 3.15~c2.79mg/1), Salinity (0.41~c0.12, 0.31~c0.04%o') total hardness (0.64~c0.21, 0.84~c0.42mg/l, N03-N (0.31~cO.26, 0.35~c0.29mg/l), and PD4-P (0.022~c0.0199 0.023~c.022mg/1), respectively. There were significant difference in the means of the parameters in the two water bodies except TDS, Alkalinity and Hardness. The water bodies were found to be slightly acidic with low conductivity. The properties in the water bodies were in conformity with international standards for both drinking and aquatic life.
    Description: includes:- 2 tables.;6 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Ikot Ebak ; Nigeria ; Abeneyentem ; freshwater environment ; Physicochemical properties ; Alkalinity ; Salinity ; Dissolved oxygen
    Repository Name: AquaDocs
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    Format: 310 - 312
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  • 6
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    Evaluation of pawpaw leaf-based diets (Carica papaya) on growth and survival of African catfish (Clarias gariepinus) fingerlings reared in plastic bowls (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23049 | 19325 | 2018-03-06 15:26:25 | 23049 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: 200 fingerlings of African catfish (Clarias gariepinus) of average weight of 22.8~c0.04g were used to investigate the nutritive value of Pawpaw (Carica papaya) leaf-based diets. Five (5) isocaloric and iso-nitrogenous diets containing fishmeal protein at a rate of 0%, 25%, 50%, 75%, and 100% along with the pawpaw leaf were formulated. The diet without the pawpaw leaf meal serves as the control. The fish fingerlings were fed at 5% body weight per day for 56 days in plastic bowls. It was observed at the end of the experiment that pawpaw leaf meal was suitable as a protein supplement when incorporated at 50% replacement. The body weight gain, specific growth rate (SGR) and food conversion ratio (FCR) values of 18.68g, 1.07%/ day and 4.72 respectively were highest in diet with 50% replacement closely followed by diet with 25% replacement. Based on the results, it could be recommended that in practice 50% replacement of pawpaw leaf meal with fish meal is optimal in practical diet of African catfish (Clarias gariepinus) fingerlings. Nevertheless, complete replacement of pawpaw leaf meal decreases growth rate and should not be used in Clarias gariepinus fingerlings.
    Description: Includes: - 3 tables.;5 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Carica papaya ; Nigeria ; freshwater environment ; Fish culture ; Feeding experiments ; Diets
    Repository Name: AquaDocs
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    Format: 320 - 324
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  • 7
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    Effect of stocking density on the growth rates of Clarias gariepinus in a floating hapa system (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23037 | 19325 | 2018-03-05 09:18:00 | 23037 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: An experimental growth trial in floating net-hapas at three stocking densities in concrete pond was carried out. 4.68 5.25g mean individual weight fish were stocked at 25, 50 and 100 per m3. A 40% protein balanced diet was used as feed. The results of the study showed no statistical significant difference in growth among the three treatments. Food conversion ratios ranged in 1.60 to 1.82, and specific growth rates were between 3.80 and 4.16%/day. The result suggests that culture of C. gariepinus at a density of 50/m3 and production of 4.15kg/m3 in 84 days with production of 8.30kg/m3 in a growing season of 180 days is possible using the net-hapa systems enclosed in a concrete pond.
    Description: includes:- 2 tables.;8 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Alau L. ; freshwater environment ; Fish culture ; Stocking density ; Growth rate ; Floating cages
    Repository Name: AquaDocs
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    Format: 276 - 278
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  • 8
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    Quantification of vitamin C (ascorbic acid) requirements of Heterobranchus longifilis fingerlings (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23039 | 19325 | 2018-03-05 20:35:11 | 23039 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A feeding experiment was conducted to quantify the minimum dietary vitamin C requirement of Heterobranchus longifilis fingerlings and the minimal dietary inclusion levels that will meet these requirements after degradation from feed processing and storage. Fish were fed a basal diet with 42.5% crude protein for a conditioning period of 2 weeks. Following conditioning, fingerlings with initial mean weight, 2.3~c0.3 g were stocked as groups of 20 fingerlings into 30 litre tanks in a mini flowthrough experimental system and fed the basal diet and experimental diets supplemented with 0, 50, 100, 150, 200, or 250 mg of L-ascorbic acid kg-1 diet obtained from TUYIL PHARM. INDUSTRIES, lIorin, included into the basal diet by replacing part of the silica component and fed to triplicate groups for 20 weeks. Fish fed the control (0 mg vitamin C kg-1) diet exhibited deficiency signs including lordosis, caudal fin deformity, skin erosion and significantly suppressed weight gain and higher condition factor. Protein efficiency ratio and specific growth rate were significantly improved with increasing levels of vitamin C up to 200mg kg-1 diet. Tissue (liver, kidney, gills and muscle) ascorbate concentration generally reflected dietary inclusion levels with the signiticant lowest level occurring in the control groups. Vitamin C analysis after feed processing revealed 18 - 21% loss. The least mean squares error regression analysis of weight gain data on inclusion level of vitamin C revealed that the minimum dietary requirement of H. longifilis is 82.2~c0.2 mg vitamin C kg-1 diet which corresponds to 100 mg of vitamin C kg-1 diet based on data from this study.
    Description: Includes:- 4 tables.;1 fig.;6 plates.;32 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Fish culture ; Feeding experiments ; Vitamin C ; Growth rate
    Repository Name: AquaDocs
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    Format: 283 - 291
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  • 9
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    Investments and employment opportunities in the aquaculture sector in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23042 | 19325 | 2018-03-05 20:39:37 | 23042 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Nigeria is a large fish consuming nation with a total consumption at more than 1.2 million tonnes, with fish imports making up about two thirds (700,000 t) of the fish supply. Although the contribution of fisheries to the Gross Domestic Product is only 3-4%, it occupies a very significant position in the primary sector providing employment for over a million people (FDF Statistics) and contributing about 50% of the animal protein intake of the population, particularly the resource poor. The estimated national demand for fish is estimated as high as 1.3 million metric tons with a wholesale value of more than $US 1 billion. Of this, the Federal Department of fisheries (FDF) estimated 511,000 tones are provided domestically or only about one third of demand, with an estimated per capita fish consumption ranging from 7.5-12 kg. With the current policy thrust towards fisheries development, there is excitement among stakeholders in private sector fish farming as shown by the expansion and renovation of existing farms and investments in few fish farms and hatcheries. This has brought the industry to a retail production value of N180 million. This development is not however without some challenges. Fish producers have rushed ahead with the production without support of a developed values chain. This gap is providing an entry point for interventions to greatly facilitate expansion of services in the value chain for this exciting industry. This paper therefore seeks to provide guidance on how to strategically focus aquaculture activities to capitalise on opportunities for increased employment and incomes.
    Description: Includes:- 1 table.;2 figs.;6 refs.
    Keywords: Aquaculture ; Nigeria ; Employment opportunities ; freshwater environment ; Investments ; Personnel ; Human resources ; Fish culture
    Repository Name: AquaDocs
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    Format: 299 - 305
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  • 10
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    Composition and abundance of macro-invertebrate community in earthen ponds of Akscoa Fish Farm Oruk Anam L.G.A., Akwa Ibom State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23045 | 19325 | 2018-03-06 15:23:21 | 23045 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Composition and abundance of macro-invertebrates, in Akwa Ibom State College of Agriculture, Fish Farm in UrukAnam Local Government Area, Nigeria, was studied from (December 2005 to May, 2006). Collections of samples were made with benthic net at weekly intervals. Stocked and unstocked ponds were selected for the study. The stocked ponds had 122 individuals macro invertebrates while unstocked pond had 160 number of individuals. The two ponds were dominated by Diptera followed by Coleoptera with single individual species. Groups which are regarded as clean water fauna were absent in both ponds. Generally, the ponds were poor in terms of number of taxa and individuals.
    Description: Includes:- 2 tables.;8 refs.
    Keywords: Aquaculture ; Ecology ; Nigeria ; Akscoa Fish Farm ; Macroinvertebrate ; freshwater environment ; Abundance ; Composition ; Microorganisms ; Microbiology ; Freshwater ecology
    Repository Name: AquaDocs
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    Format: 313 - 315
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  • 11
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    Diseases associated with livestock integrated fish farming in Nigeria: a review (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23215 | 19325 | 2018-03-17 12:47:49 | 23215 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Just like other animals and humans, fishes are prone to diseases and predation. Diseases can be caused by one and/or combination of any of the following agents e.g. bacteria, fungi, viruses and parasites. Diseases have become a primary constraint to aquacultural development, which may affect the achievement of a desired impact for rapid development of fish culture in Nigeria. Apart from causing mortalities, they also cause loss of production quality, reduced growth, reduced fecundity, loss due to control measures and loss due to social factors associated with the farmer. This review has discussed the diseases that are associated with integrated fish farming including livestock cum fish farming, poultry-cum fish farming, Waste water fish farming, rice-cum fish farming e.t.c. The control of diseases associated with integrated fish farming requires a multi-disciplinary approach including chemotherapy, sanitation, routine hygiene, quarantine, genetic selection and immunoprophylaxis. The treatment and prevention of fish diseases follow the same principles used in chemotherapy of higher animals.
    Description: Includes:- 4 tables.;9 refs.
    Keywords: Agriculture ; Aquaculture ; Nigeria ; freshwater environment ; Fish culture ; Diseases ; Bacteria
    Repository Name: AquaDocs
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    Format: 19 - 23
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  • 12
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    Lysine requirement of Oreochromis niloticus (2021)
    Fisheries Society of Nigeria | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23370 | 19325 | 2018-04-10 16:05:46 | 23370 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Oreochromis niloticus was reared in 54 litre glass tanks being fed with 35% crude protein diets for 56 days. A basal diet consisting intact protein from groundnut cake and guinea com (4.56g lysine/100g protein) ,four graded levels of crystalline lysine was added to formulate diets consisting 6.87, 7.30, 7.41, 7.51 g lysine /100g protein and a reference diet of intact protein from groundnut cake, guinea com and fish meal having 5.37g lysine/100g protein was fed to six treatments in triplicate groups. The growth parameters shows there was no significant difference in the mean weight gain, specific growth rate, food conversion efficiency and protein efficiency ratio of fish fed varying levels of lysine. A maxima was obtained from the quadratic equation of food efficiency ratio against graded levels of lysine at 7.3g/100g protein which is the requirement. Carcass ash was higher with the initial fish while crude protein was highest with the the fish fed 7.3g lysine/l00g protein
    Description: Includes:- 6 tables.;22 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; New Bussa ; Fish culture ; Nutritional requirements ; Nutrition ; Feeding experiments ; Lysine
    Repository Name: AquaDocs
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  • 13
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    Management and utilization of water hyacinth (Eichhornia crassipes) for improved aquatic resources (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23439 | 19325 | 2018-05-02 08:19:22 | 23439 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Natural aquatic plants population can be healthy for any aquatic ecosystems as they serve as fish feed, play an important role in nutrient cycling, purify the water, control unwanted algal growth and support fauna including birds. Water hyacinths (Eichhornia crassipes) have proven to be a persistent and expensive aquatic weed problem. The review was carried out in the face of current global challenge (climate change) which threatens biodiversity conservation and sustainable use of natural resources so that water hyacinth could be viewed as an asset of multifarious benefits considering the revealed highlights rather than been labeled expensive nuisance. The simplest method of management of aquatic weeds is to harvest it and utilize it for cost effectiveness in production such preparation of fish and livestock feeds, bio-gas production, making of charcoal briquetting and waste water treatment for domestic and industrial use. The main problem of utilization and management of water hyacinth is its high cost of transportation to sites for utilization but, once this can be overcome as revealed in the review appropriate utilization techniques is recommended.
    Description: Includes:- 4 tables.;34 refs.
    Keywords: Aquaculture ; Biology ; Conservation ; Eichhornia crassipes ; Nigeria ; freshwater environment ; Plant utilization ; Aquatic plants
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    Format: 162-170
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  • 14
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    Comparative analysis of physicochemical characteristics of ABU and Zaria Dam (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23440 | 19325 | 2018-05-02 08:25:12 | 23440 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physical and chemical parameters of ABU Dam and Zaria Dam were carried out between September and October 2009. The results obtained in the two water bodies were temperature 27.7 0C, pH (7.5 and 7.3), dissolved oxygen (5.8 mg/l and 5.0 mg/l), biochemical oxygen demand (1.74 mg/l and 2. 16 mg/l), alkalinity (58 mg CaC03/l and 49 mgCaCO3/l) P04-P (2.47 mg/l and 1.59 mg/l) NO3-N (3.67 mg/l and 3.47 mg/l), conductivity (54.70 ~ks-1 and 42.48 ~ks-1), total hydrocarbon (TH) (47.66 mg/l) and 48.00 mg/l) and total dissolved solids (32.68 mg/l and 25.35 mg/l) respectively. There was no significant difference in the mean values of the parameters (P〉0.05) except conductivity and total dissolved solids. The water bodies were found to be neutral with high conductivity. All the properties in the water bodies were in conformity with international standards both for drinking and aquatic life.
    Description: Includes:- 2 tables.;7 refs.
    Keywords: Chemistry ; Limnology ; Pollution ; Nigeria ; Zaria Dam ; Nigeria ; ABU Dam ; freshwater environment ; Physicochemical properties ; Pollution
    Repository Name: AquaDocs
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    Format: 144-146
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  • 15
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    Relationship among Tilapia guineensis fingerlings abundance and water quality variations in a brackish water reservoir in Lagos (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23442 | 19325 | 2018-05-02 08:28:15 | 23442 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In recent times there has been an upsurge in the culture of Tilapia in Nigeria resulting in increased demand for the fingerlings which is hardly satisfied. This is due to increasing demand for table size tilapia as food fish and under-sized tilapia in the fish meal and fish canning industries in Nigeria. Collection of Tilapia guineensis fingerlings from the wild, to augment hatchery production, has been the practice and this is subject to environmental fluctuations. Multivariate regression and correlation analyses of accumulated data were used to investigate the effects of changes in water quality parameters on abundance of fingerlings of Tilapia guineensis in a brackishwater habitat in Lagos. Dissolved oxygen (DO), salinity and secchi transparency were found to be the most dominant factors affecting the abundance of Tilapia guineensis fingerlings in the Lagos lagoon. Peak period of abundance was closely associated with period of low salinity (0.50%o to 5.60%o), which coincided with the period of low transparency and low DO in the rainy season. The correlation analyses of Tilapia guineensis fingerlings with the water quality parameters yielded the following correlation coefficients (r)- 0.598; (salinity); -0.644 (transparency); -0.710 (DO); -0.566; (temperature) and 0.129 (pH). The abundance of Tilapia guineensis fingerlings in the Lagoon was ultimately defined by a suitable regression equation. This result is expected to optimize the collection of fingerlings of Tilapia guineensis from the wild and boost food fish security in Nigeria and elsewhere.
    Description: Includes:- 1 table.;1 fig.;( refs.
    Keywords: Chemistry ; Fisheries ; Tilapia guineensis ; Nigeria ; Port Harcourt ; brackishwater environment ; Water quality ; Fingerlings ; Chemical properties ; Physicochemical properties
    Repository Name: AquaDocs
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  • 16
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    Tissue distribution of heavy metals in fin fish from a tidal fish farm in South East Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23450 | 19325 | 2018-05-04 17:32:24 | 23450 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The concentration of heavy metals: Lead (Pb), Cadmium (Cd), Iron (Fe) and Zinc (Zn) in tissues of fin fish from a tidal fish farm in Calabar, South East Nigeria, was determined. The mean levels of heavy metals (~kgg-1) in gills, muscle tissues, liver and intestines of catfish were Pb: 2.39~c1.24; Cd: 0.87~c0.83; Fe: 3.96~c1.55; Zn: 8.15~c3.18. Mean levels in Tilapia were Pb: 0.035~c0.002; Cd: 0.61~c0.05; Fe: 1.09~c0.61; Zn: 2.17~c0.53. There was no significant difference (p〈0.05) in tissue concentrations of Pb and Cd whereas a significant difference (p〈0.05) was observed between Pb and Zn concentrations for both species of fish. Concentrations were also higher in liver, gills and muscle tissues than the intestines. Highest concentrations were observed in the liver and gills in both species. Generally, higher concentrations were observed in liver, gills and muscles of Catfish than in Tilapia. Concentrations of Pb and Fe in Catfish were significantly higher (p〈0.05) than the WHO limits, while Zn and Cd were lower. Tissue concentrations of all the metals in Tilapia were however, within the WHO recommended limits. The concentrations in all the fish tissues were significantly higher (p〈0.05) than in the surrounding water. The observed values in Catfish indicate environmental threat to the health of the fish and indeed the humans that consume them and therefore calls for environmental surveillance in the area
    Description: Includes:- 3 tables.;1 fig.;7 refs.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Calabar ; freshwater environment ; Heavy metals ; Tissues ; Pollution ; Pollution effects
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    Spatial and temporal variations of physicochemical variables in a small 'pristine' stream in Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23445 | 19325 | 2018-05-02 08:32:33 | 23445 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Spatial and temporal variations of physico-chemical variables of Onu-Iyi ?Ukwu stream were studied for 12 months from March 2005 to February 2006. Three sampling stations were established along the main stream channel from source to mouth. Spatial variation in physico-chemical parameters indicated that total alkalinity, total hardness, conductivity, and nitrate-nitrogen (NO3) recorded their highest values at the upper reaches (with values 14.0mg/l, 88.09mg/l, 17.00~kscmiscm, and 0.60mg/l respectively). Dissolved Oxygen (DO) and pH had their maximum values of 8.20mg/l and 6.94 at the middle reaches. Turbidity, biochemical oxygen demand (BOD), temperature and phosphate-phosphorus (PO4) increased steadily from source to mouth. The observed seasonal variation indicated that wet season values were higher for all the parameters except temperature, turbidity, phosphate-phosphorus (PO4) and total alkalinity although the values were not statistically significant at p〉0.05. The correlation coefficient (r) showed no significant relationships p〈0.05 between physico-chemical parameters except DO and BOD with correlation values of (0.75 and -0.54) respectively.
    Description: includes:- 2 tables.;1 fig.;17 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Onu-Iyi-Uku Stream ; freshwater environment ; Physicochemical properties ; Phosphates ; Phosphorus ; Turbidity
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  • 18
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    Limnological studies of Bosso dam and it's tributaries in Minna, Niger State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23449 | 19325 | 2018-05-02 08:39:20 | 23449 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physico-chemical parameters of Bosso Dam were analyzed weekly for a period of six (6) weeks from 29th October, 2009. In all, six (6) stations were identified within the dam. The physico-chemical parameters assessed were: temperature, dissolved oxygen, pH, alkalinity, hardness, conductivity and transparency. The results obtained from the analysis revealed slight variations in most parameters. There was no significant difference p〉0.05 in pH regardless of stations and weeks. But significant difference p〉0.05 were observed in dissolved oxygen, nitrate, temperature, conductivity, hardness, alkalinity, biological oxygen demand, transparency, in respect regard to stations. These variations could be due to influx of organic waste from surface run offs and inorganic waste deposited by man. The physico-chemical parameters observed, indicated that most of them fall with the recommended range or standard by the Federal Ministry of Environment
    Description: Includes:- 2 tables.;10 figs.;18 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Bosso dam ; freshwater environment ; Physicochemical properties ; Chemical properties ; Physical properties ; Water properties
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  • 19
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    African Regional Aquaculture Centre Library: information resources and services (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23513 | 19325 | 2018-05-08 15:39:43 | 23513 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Effective research development is no doubt information driven and ARAC library remains the place to easily access accurate and reliable information. There is an urgent need to acquire and maintain its information resources in order to provide globally acceptable information. The production of validated research literatures by ARAC staff goes to show that the library has made itself relevant to scientist in achieving their mandate to ARAC. This Paper examines the resources and services rendered by the African Regional Aquaculture Centre library in meeting the needs of research Scientist, students and stakeholders in Aquaculture practice in the Niger Delta Nigeria. It describes the establishment of TEEAL and OARE service within the library and examines the research interest of scientist and library users with emphasis on their research areas.
    Description: Includes:-2 tables.;2 figs.;10 refs.
    Keywords: Aquaculture ; Information Management ; Nigeria ; Port Harcourt ; freshwater environment ; Information services
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  • 20
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    The comparative effect of fish and blood meal based diets on the growth and survival of juvenile tilapia (Oreochromis niloticus) in concrete tank (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23508 | 19325 | 2018-05-08 15:31:05 | 23508 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An experiment was carried out to find out the comparative effect of imported fish meal, blood meal and local fish waste based diets on the growth and survival of juvenile tilapia. (O. niloticus) in concrete tank. Four diets consisting of N.I.O.M.R. pelleted feed containing 40% CP, with imported fish meal, as the control and three others formulated with fresh, boiled cattle blood and local fish waste meal at 30% CP, were fed to juvenile tilapia with average initial weight of 55.24g in four treatments and four replicates in a completely randomized design. Result indicated final body weights of 100.83, 96.54, 98.4 and 86.82g and average body length of 18.47, 18.16, 18.4 and 18.14cm, for treatments 1 (control), 2 (fresh blood based diet), 3 (boiled blood based diet) and 4 (local fish waste meal based diet) respectively, with no significant difference between the treatments (P〉0.05). The same was also true for average daily weight gain of 0.41, 0.36, 0.31 and 0.28g. However, treatment 1 and 2 had better relative weight gain 93.69 and 80.21%, than 3 and 4 at 62.37 and 64.85% respectively, (P〈0.05). The survival was 100% in all treatments. Treatment 2 was more cost effective at N539.06/Kg fish, followed by 1 with N667.52. Treatments 3 and 4 had the highest at N698.20 and N718.60 per kg fish. The trial showed that tilapia feed processed with fresh cattle blood performed as well as imported fish meal, boiled blood and local fish waste and in addition was more cost effective.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Port Harcourt ; Feed evaluation ; freshwater environment ; Feeding experiments ; Diets ; Nutritional requirements ; Survival ; Growth rate
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  • 21
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    Factors related with adoption of fish farming technologies in selected communities in Niger State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (NIgeria)
    In:  http://aquaticcommons.org/id/eprint/23478 | 19325 | 2018-05-05 13:04:01 | 23478 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study investigates the factors, which inhibit or facilitate adoption of fish farming technologies by individual fish farmers in Niger State. There was significant relationship between six of the ten variables investigated and these have contributed significantly (p〈0.05) towards predicting the adoption scores of the fish farmers. It is believed that proper assessment of these factors by researchers could be used by policy makers and executioners to improve adoption of fish farming innovations. Significant factors include farmers’ age, education, pond size, access to credit, sources of information and income level. Recommendations were made involving change agents and policy markers for future fisheries and aquaculture development in Nigeria. Keywords: Study, Factors, Adoption, Technologies, Fish farming, Communities, Nigeria
    Description: Includes:-5 tables.;8 figs
    Keywords: Aquaculture ; Information Management ; Nigeria ; Niger State ; Fisheries Extension Services ; freshwater environment ; Technology transfer ; Fish culture
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    Climate change: implications for fisheries and coastal aquaculture (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23531 | 19325 | 2018-05-09 13:01:07 | 23531 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A keynote address at the 25th annual conference of the Fisheries Society of Nigeria. The paper presented evidence of climate change in the past and discussed the issue of global warming in the past, present and future. The Greenhouse effects are some of the topics discussed. Discussed in greater detail is the Nigerian situation in the global warming and climate change. The potential impacts on aquaculture has been enumerated. The paper is concluded by given suggestionswhich mitigate the impact of climate change and called on the Federal Ministry of Environment to strengthen research and other arms of government to create a strong synergy to work towards ameliorating the impact of climate change in the country.
    Description: Keynote address at the 25th Annual Conference of the Fisheries Society of Nigeria. Includes:- 2 tables.;6 figs.;6 plates;12 refs.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Climatic changes ; Fisheries ; Aquaculture
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  • 23
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    Culture trial of (Peneaus) Penaeus monodon in concrete tank (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23527 | 19325 | 2018-05-09 12:48:12 | 23527 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Culture trial of the Tiger Shrimp (Peneaus monodon) was carried out in one of the grow-out concrete tanks at Nigerian Institute for Oceanography and Marine Research, Victoria Island, Lagos. A total of 264 post larvae of P. monodon (PL 30) produced at the Institute’s shrimp hatchery complex were used for the experiment which lasted for 157 days. Coppens Catco feed of 0.8 - 1.2mm size was used to feed the post larvae throughout the duration of the experiment. The results showed that the shrimps grew from an initial mean body weight of 1.763g at stocking to 19.538g at the end of the experiment. The daily growth rate was 0.113g/day while specific growth rate was 1.532 %. Food Conversion Ratio (FCR) was 3.362 while survival rate was 90%. The study has shown that P. monodon can be successfully cultured in concrete tanks. However further studies aimed at improving growth rate will be undertaken.
    Description: Includes:-2 tables.;5 plates.;15 refs.
    Keywords: Aquaculture ; Peneaus monodon ; Nigeria ; Lagos ; freshwater environment ; Shrimp culture ; Crustacean culture ; Aquaculture
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  • 24
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    Growth, survival rate and condition factor of Heteroclarias hatchlings fed cultured Moina micrura, shell free Artemia and combination of both as starter feed (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23503 | 19325 | 2018-05-07 12:27:24 | 23503 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Growth (Percentage weight gain, Specific growth rate , total body length), survival rate and condition factor of Heteroclarias fry fed shell free Artemia, cultured Moina micrura and mixture of both as starter feed were investigated. 30 individual fry were placed in a 4-litre plastic bowl in three treatments of 3 replicates for 25 days in Fish Hatchery. Individual water quality parameters (water pH, temperature, Dissolved oxygen, total Alkalinity and carbon dioxide) monitored for each treatment were not significantly different (p〉0.05) from each Heteroclarias fry fed live M. micrura had the highest percentage weight gain (496.03%), Specific growth rate (3.09), percentage survival rate (88.83%) and condition factor (39.75) but these results were not significant different (P〉0.05) from those of shell free Artemia except those of condition factor. Shell free Artemia and Live M. micrura combination was observed to have the lowest fry Percentage weight gain (428.30%),. specific growth rate(2.54), % survival rate (85.50), condition factor(24.39) and total body length(1.52cm). The highest total body length was observed in shell free Artemia although not significantly different (p〉0.05) from others. The implication of using cultured live M. micrura instead of shell free Artemia as starter diet for Heteroclarias hatchlings at the critical stage of development are discussed
    Description: Includes:- 6 figs.;16 refs.
    Keywords: Aquaculture ; Heteroclarias ; Moina micrura ; Nigeria ; Keffi ; freshwater environment ; Growth rate ; Survival ; Condition factor ; Feeding experiments ; Fish culture
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  • 25
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    Haematological profile of blood of African catfish (Clarias gariepinus, Burchell 1822) fed sunflower and sesame meal based diets (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23506 | 19325 | 2018-05-07 12:32:20 | 23506 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of substituting soybean meal with raw sunflower and sesame seed meal was evaluated using haematological indices of Clarias gariepinus fed the diets containing sunflower and sesame seed meal. Seven isonitrogeneous and isocaloric diets containing sunflower and sesame seed meal replacing soybean meal at a rate of 15, 30 and 45% were prepared. A diet without replacement of soybean meal served as control. The result of fish fed test diets showed significant (P〈0.05) difference over the fish fed control diet with respect to PCV and mean corpuscular volume (MCV). Fish fed control diet had the lowest Hb, PCV, WBC, RBC, MCV, MCHC, ESr. There was no significant difference (P〉0.05) in the fish fed control diet and test diets with respect to MCH, MCHC, ESr, Neutrophil, Monocytes, Eusinophils and Lymphocytes. Hence it can be concluded that the haemotological parameter of Clarias gariepinus is not significantly (P〉0.05) changed with increase dietary inclusion of raw sunflower and sesame seed meal.
    Description: Includes:- 4 tables.;22 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Feeding experiments ; Fish culture ; Diets ; Nutritional requirements ; Haematology
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  • 26
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    Growth response of Clarias gariepinus (Burchell 1822) juveniles fed diets containing raw Mucuna utilis seed meal (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23505 | 19325 | 2018-05-07 12:31:00 | 23505 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Feeding trial was conducted in static water to assess the growth of Clarias gariepinus fingerlings fed different inclusion levels of Mucuna seed meal (MSM). Raw MSM was used at 10%, 20% and 30% inclusion levels and the performance of fish fed these diets was compared with the fish fed soybean-based diet which contained 40%protein. All diets were prepared to be isonitrogenous and isocaloric. A four by six factorial experiment with three replicates using ten fish each of average initial weight of 6.6g was carried out. Daily fish ration of five percent body weight was administered two times for twelve weeks. The specific growth rate (SGR) in diet 1 (control) was significantly (p〈0.05) higher than the other dietary groups and worsens as inclusion level increased similar trend was also observed in the food conversion ratio (FCR) and protein efficiency ratio (PER). The significantly lower growth performance of fish fed diets containing raw MSM might be due to the presence of anti-nutritional factors present raw MSM. The possibility of improving this trend through processing should be investigated.
    Description: Includes:- 3 tables.;14 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Osogbo ; freshwater environment ; Feeding experiments ; Fish culture ; Diets ; Growth rate
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  • 27
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    Growth of Clarias gariepinus juveniles fed five commercial feed (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23504 | 19325 | 2018-05-07 12:29:55 | 23504 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Clarias gariepinus juveniles 6.35 ~C 0.22 g weight were fed five different commercial diets for 105 days to determine growth rates. Diets were hand distributed in triplicate groups of 30 fish once daily. The diets used were Coppens, Multifeed, Eurogold, Vittal and Ajanla feeds. At the end of the experiment, the final mean weight for Coppens, Multifeed and Eurogold were 181.54 ~c 0.63 g, 179.92 ~c 0.95 g and 139.92 ~c 0.26 g respectively, while final mean weight for Vital and Ajanla were 110.11 ~c 0.23 g and 119.03 ~c 0.35 g respectively. The statistical analysis of the results showed that there were significant differences (P〈0.05) in the mean final weights. Also there was no significant difference (P〉0.05) in the mean final weight between Coppens and Multifeed. The specific growth rates (SGR) were 3.19% day-1 3.18 % day-1 and 2.94% day-1 for Coppens Multifeed and Eurogold respectively and 2.71% day-1 and 2.78% day-1 respectively for Ajanla and Vital. There were significant differences (P〈0.05) in SGR among treatments and no significant difference (P〉0.05) between SGR of Coppens and Multifeed. Based on these findings, it was concluded that feed with macronutrient combinations of 45% CP, 12% crude fat, crude fiber, 1.5%, Ash 9.5% promoted better growth rates in C. gariepinus juveniles as compared with other combinations.
    Description: Includes:- 2 tables.;21 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeriaa ; Port harcourt ; Feed trial ; Feed evaluation ; freshwater environment ; Feeding experiments ; Fish culture ; Feed efficiency ; Feed
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    Effects of replacement of fishmeal with palm grub (Oryctes rhinoceros Linnaeus, 1758) meal on the growth of Clarias gariepinus (Burchell, 1822) and Heterobranchus longifilis (Valenciennes, 1840) fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23510 | 19325 | 2018-05-05 13:09:20 | 23510 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Clarias gariepinus (0.73 ~c 0.01g) and Heterobranchus longifilis fingerlings (0.67 ~c 0.01g) were fed five isonitrogenous diets of about 40% crude protein, with varying levels (0-100%) of palm grub meal for 12 weeks. At the end of the study, C. gariepinus and H. longifilis fingerlings fed 25% palm grub inclusion diet had the highest weight gain (5.30g and 4.05g respectively), relative (726.0% and 595.6%) and specific (1.09% and 1.00%) growth rates while those fed 100% palm grub inclusion diet showed least growth; weight gain (2.68g and 2.15g), relative (367.1% and 316.2%) and specific (0.80% and 0.45%) growth rates respectively. Food conversion and protein efficiency were also best in fingerlings fed 25% palm grub meal diet (0.70 and 1.35 for C. gariepinus; 0.75 and 1.35 for H. longifilis respectively) with decreasing efficiency as palm grub inclusion level increased in the diets. The differences in the growth and nutrient utilization of the fingerlings on the various diets were generally insignificant (p〉0.05) above 25% inclusion level of palm grub. The study showed that palm grub can be used to completely replace fish meal in mudcatfish diets. However, for optimal growth and nutrient utilization, 25% level of replacement of fish meal with palm grub meal is most adequate in C. gariepinus and H. longifilis fingerlings diets.
    Description: Includes:- 7 tables.;2 figs.;12 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Heterobranchus longifilis ; Oryctes rhinoceros ; Nigeria ; Ibadan ; freshwater environment ; Feeding experiments ; Growth rate ; Fish culture ; Diets
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    Lysine requirement and its effect on the body composition of Oreochromis niloticus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23512 | 19325 | 2018-05-08 15:38:22 | 23512 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study was carried out to investigate the lysine requirement and its effect on the body composition of Oreochromis niloticus fingerlings. Two hundred and seventy fingerling O. niloticus (9.01 -11.09g) were reared in 35L plastic troughs. Six diets were formulated, containing 35% crude protein. The diets were formulated with ingredients deficient of lysine (Groundnut cake -3.23g lysine/100g diet and guinea corn -1.9g lysine/100g diet) for O. niloticus having whole body content of 7.51g lysine/100g protein. The diets consist of a basal diet (Diet I, no added lysine), while the test diets (II, III, IV and V) had 4.56g, 6.87g, 7.30g, 7.41g lysine/100g protein respectively. The reference diet was made of Clupeids (mixture of Pellonula afzeliusi and Physalia pellucida), groundnut cake and guinea corn but no added lysine (5.37g lysine/100g protein). The fish were fed twice daily (0900 and 18.00hrs) at 3% body weight for 56 days. There was significant difference in the mean weight gain and food conversion efficiency (P〈0.05). The four levels of lysine resulted in quadratic responses (P〈0.05). Calculation using regression equations from the relationship between the specific growth rate, weight gain and lysine levels show that lysine requirement for fingerling was 7.12g/100g protein respectively. The requirement of O. niloticus for lysine is 7.12g lysine/100g protein.
    Description: Includes:-6 tables;18 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; New Bussa ; freshwater environment ; Lysine ; Feeding experiments ; Diets ; Feed composition
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  • 30
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    Proximate composition of some commercial fish feeds sold in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23511 | 19325 | 2018-05-08 15:37:02 | 23511 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: A study was undertaken to analyse and compare with manufacturers’ declaration the nutrient content of some feeds available in Nigeria through proximate analysis. The commercial fish feeds collected from the markets were Adolf Calyx, Coppens, Dizengoff and Durante. Proximate composition such as moisture, crude protein, crude lipid, ash, fibre and NFE (nitrogen free extract) were analysed. In general, there was variation between analysed and company declared nutrient contents of different feeds especially the protein and lipid content of the feeds. Apart from Adolf Calyx, all the analysed feeds had protein contents of above 40% which is good for catfish production as recommended by the manufacturer. Keywords: Proximate composition, Commercial fishfeeds, Adolf Calyx, Coppens, Dizengoff, Durante.
    Description: Includes:- 2 tables.;15refs.
    Keywords: Aquaculture ; Nigeria ; Makurdi ; Proximate analysis ; Feed evaluation ; freshwater environment ; Moisture ; Ash content ; Proteins ; Lipids ; Diets ; Feed ; Feed efficiency
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    Sources and uses of micro-credit in poverty alleviation among fish farmers in Osun State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23521 | 19325 | 2018-05-09 12:23:43 | 23521 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Aquaculture is one of the fastest growing food production systems in the world, Nigeria inclusive with the bulk of its output currently being produced within developing countries and with expectations for aquaculture sustainable food security and poverty alleviation. However, poverty which is a social condition characterised by the inadequacy of access to basic human needs for the maintenance and socially acceptable minimum standards of living is still prevalent. One of the major obstacles to achieving the objectives of poverty reduction through aquaculture is the inadequate credit facilities to boost production. The study therefore, this study investigates the sources and uses of micro-credit in poverty alleviation among fish farmers in Osun state, Nigeria. A two stage random technique was used to select 137 respondents from the three Osun State Agricultural Development Programme (ADPs) zones. Structured questionnaire was used to collect data on demographic characteristics, Micro-credit sources and use, occupational, income and fish production data. Data was analysed using descriptive statistics, FGT and logit model. The result shows that both formal and informal micro-credit sources were used in the area studied with high interest rate militating against the adequate use of some of the micro-credit sources. Poverty alleviation through micro-credit use will increase efficiency through the use of modern effective and efficient technology leading to greater production. The policies aimed at making micro-credit readily available should be focused on to alleviate poverty among fish farmers
    Description: Includes:- 4 tables.;1 fig.;12 refs.
    Keywords: Aquaculture ; Management ; Nigeria ; Osun State ; Microfinace ; freshwater environment ; Financial management ; Socioeconomic aspects ; Sociological aspects
    Repository Name: AquaDocs
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    Privatization: a policy to transform and increase the production capacity of fish in Nigeria fish industries (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23524 | 19325 | 2018-05-09 12:30:42 | 23524 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Over 200 hatcheries of fish exist in Nigeria with at least two hatcheries in each state of the federation but unfortunately over 50 percent are either non-functional or function far below their optimum production capacities. Also about 85 percent of the non-functional hatcheries belong to the government (-either federal, state, local government or institution). The associated problems with the non-functional hatcheries include: inadequate funding, poor maintenance of hatcheries facilities, high cost of feed inputs, in adequate infrastructure, differential growth and cannibalism in catfishes which result in poor fingerling harvest, low attitude and lack of commitment to government work. Privatization/ownership options are considered the best options for this paper and clues to solve the problems mentioned above through privatization are presented. Problems with privatization and private investment are also discussed. It was advised that in case the existing hatcheries are put in to full production, the national demand for fingerlings which is placed at 4.3 billion annually could be met with ease. Fingerlings production in the hatchery as the quickest revenue yielding aspect of fish farming (with high internal rate of returns and short pay back period) capable of attracting revenue within 2-3 mouths of a breeding exercise are emphasized.
    Description: Includes:- 10 refs.
    Keywords: Aquaculture ; Nigeria ; Privatization ; Hatchery ; freshwater environment ; Hatcheries ; Seed production ; Fish culture ; Fishery development ; Development projects
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    The rise of peri-urban aquaculture in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23533 | 19325 | 2018-05-10 09:40:52 | 23533 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper traced aquacultural development in Nigeria to the colonial period in 1950s with fish farming in tilapias during which more than 200 small scale subsistence level ponds were built with some growth continuing in the rural areas. There was a bloom in farming of catfishes in 2000. The interest shown by private fish farmers has been identified as a propelling factor for aquacultural development in Nigeria. The development of private fish hatcheries has been another factor leading to the growth of aquaculture. The paper noted that social capital and its development either directly or indirectly can be identified as contributing to the success of the sectors. The increasing profit from aquaculture has led to fish farmers increasing beyond 5000 tonnes in 2009. The paper highlighted the numerous advantages which led to the expansion of the industry in Nigerian villages.
    Description: FISON EKO 2010: Invited paper. Pagination on document pp. 1-15 Include:- 1 table.;16 figs.;14 refs.
    Keywords: Aquaculture ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Aquaculture ; Fish culture ; Aquaculture development
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    Developing shellfish industry in Nigeria: technology and economics (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23534 | 19325 | 2018-05-10 09:44:16 | 23534 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper asserted that shellfish resources are poorly developed and utilized in West Africa. This was proved by the fact that in 2008 total marine shellfish capture production in West Africa was only 29,815 tonnes. The advantages of Nigeria in beefing up its production are highlighted. Some of these advantages are on extensive coast line which has not been affected by industrial pollution. The tropical climate is also an advantage for growing of cultured shellfish. The paper highlighted that to maximize the potential of shellfish Mari-culture development requires education, training, seed production technology, grow-out technology, processing and marketing. These requirements are discussed in details in the paper.
    Description: FISON EKO 2010: Invited paper Includes:- 3 tables.;9 figs.;60 refs.
    Keywords: Biology ; Aquaculture ; ASE ; Nigeria ; Coast ; marine environment ; Shellfish ; Shellfish culture ; Shellfish fisheries
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    The reproduction of Oreochromis niloticus (Cichlidae) in Kigera Reservoir, New Bussa (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23018 | 19325 | 2018-03-05 20:29:06 | 23018 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The production of Oreochromis niloticus (Family Cichlidae) was carried out at Kigera Reservoir using a total of 54 0.niloticus comprising of 34 males (62.96%) and 20 females (37.04%), with 57.41 % been sexually matured. This species bred throughout the period of study. It is a matertanal mouth brooder with females species carrying eggs, hatchlings and fries in their mouth. The sex ratio of O. niloticus was 1 :2. The maximum fecundity was 1152 eggs. The relative high fecundity recorded was an indication of suitability of studied areas for fish production. The environmental factors monitored showed that dissolved oxygen ranges from 3.7 to 5.4mg/l, rainfall ranges from 34.9 to 348.5mm, temperature was between 25.5 and 34.5~'C, pH value was between 7.4 and 7.5 while the rate of sunshine was between 23/4 and 61/2 hr. The spawning of this species in their natural or hatchery condition is therefore best achieved during the peak of raining season.
    Description: Includes:- 4 tables.;2 figs.;18 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Kigera R. ; freshwater environment ; Reproduction ; Fecundity ; Spawning
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    Assessment of water quality in Kigera Fish Farm, New Bussa (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23017 | 19325 | 2018-03-05 09:26:57 | 23017 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The physico-chemical and biological characteristics and nutrient concentration of Kigera Fish Farm ponds were monitored for two months to assess the water quality. The parameters measured were dissolved oxygen, temperature, hydrogen ion concentration, Secchi-disc transparency and zooplankton composition. Some fish species were identified in the course of study. Temperature ranged from 26 -30degreesC; dissolved oxygen ranged from 3mg/l-6.6mg/l, pH ranged 7.0 -7.2; while Secchi-disc transparency ranged from 0.19 - 0.25m. The three ponds were quite similar in these parameters. All the parameters that were investigated in this study are within the tolerable level for warm water fishes. Five different zooplankton species were identified at the Kigera Fish Farm, and were grouped according to their major categories namely: Copepods, Cyclopoids and Copepodite), Cladoceran (〈i〉Moina〈/i〉), and Rotifera (〈i〉Asplanchina〈/i〉). 〈i〉Branchionus〈/i〉 species in the Rotifers group dominated the zooplankton species in all the three ponds.
    Description: includes:- 5 tables.;7 refs.
    Keywords: Aquaculture ; Chemistry ; Nigeria ; Kigaria Dam ; freshwater environment ; Water quality ; Physicochemical properties ; Zooplankton
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    Honey comb potentialities as growth promoter and preservator in Clarias gariepinus diets (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23024 | 19325 | 2018-03-05 09:10:54 | 23024 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Honey comb was involved as floating additive in fish diets at 0, 4 and 8% levels in 30% crude protein Clarias gariepinus juveniles of mean weight 30.30~c0.05g for 56 days in aquaria each measuring 60 x 30 x 30cm. Within six weeks all stages of grain weevils Oritzaphillus mecartus were associated with the honey comb diets, while those with honey comb remained as kept. Feed and fish values were better in honey comb diets. The growth, food utilization indices; feed and fish values were significantly (P〈O.05) higher in honey comb diets. Bee keeping for income and honey comb usage in fish diets were suggested to fish farmers.
    Description: Includes: 3 tables.;1 fig.;22 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Diets ; Feed composition ; Feed preparation ; Floating ; Fish culture
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    Effects of lipid on growth and feed utilization of Heterobranchus longifilis fingerlings (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23016 | 19325 | 2018-03-05 20:27:12 | 23016 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A study was carried out to examine the effect of lipid level on growth and feed utilization of Heterobranchus longifilis. Fingerlings of H. longifilis (28 days old (0.7 ~c 0.05g) were fed three formulated diets with three levels of lipid (7.00%, 12.5% and 18.0% of dry matter) at one level of protein (35.0% crude protein dry matter (OM) basis) for eight weeks. Weight gain (g) and specific growth rate (SGR, % day-1) values indicated that fish fed diets with 7.0% and 12.5% lipid exhibited higher growth performance. Lowest growth was recorded for fish fed diet with 18.0% lipid. Feed intake (FI, g fish-1) was also significantly (P 〈 0.05) affected by dietary lipids and tended to decrease with increasing lipid levels. Fish that showed the highest FI were those that were fed the 7% and 12.5% lipid diets. Feed conversion ratio (FCR) values indicated that diets containing 12.5% and 18% lipid were more efficiently utilized. No significant differences in muscle composition were observed among fish fed the different diets. There was a linear relationship (P〈0.05) between dietary lipid level and liver lipid. Hepatosomatic index (HIS) increased with dietary lipid level. The results indicated that H. longifilis fingerlings performed best with the diets containing 7.0% and 12.5% lipid when protein concentration was 35.0% and, reduced growth and increased body fat were evident when dietary energy increased from 19.06 to 20.54 kJg-1.
    Description: Includes:- 3 tables.;35 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Feed Utilization ; freshwater environment ; Fish culture ; Lipids ; Growth ; Feed efficiency ; Feeding experiments
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    Intraspecific hybridization studies in three strains of Clarias gariepinus (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23022 | 19325 | 2018-03-05 09:09:30 | 23022 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Intraspecific hybridization studies were carried out in three strains of Clarias gariepinus obtained from three ecological zones in Nigeria: rainforest; (Onitsha strain), Guinea savanna, Kainji strain) and Montanne vegetation, (Jos strain) with the aim of improving the growth performance of the species. Nine genetic mating combinations were generated from the three strains and were successfully induced under controlled hatchery conditions. Indoor and outdoor growth parameters were monitored. The 19 days growth indoors showed significant difference (P〈O.05) in weight gain. Highest weight gain (2.76g) was obtained in Jos parental strain and cross involving female Jos and male Kainji, while the least was recorded in female Kainji and male Onitsha (0.062g). The 50 days outdoor growth performance also showed significant difference between the genetic mating combinations. Maximum weight gain (464.57g) was observed in female Kainji and male Onitsha, while female Jos and male Kainji gave 263.94g weight gain. There was no significant difference (P〉0.05) in length in both indoor and outdoor rearing. Based on this study, the cross-involving female Kainji and male Onitsha is recommended for fingerling production of Clarias gariepinus.
    Description: Includes:- 4 tables.;1 fig.;4 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Hybridization ; Breeding ; Genetics ; Hybrid culture
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    Hatchability and survival of H. longifilis fertilized at varying latencies (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23307 | 19325 | 2018-03-30 15:16:37 | 23307 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In determining the optimum latency period of H. longifilis, of which the hatchability and higher Survival percentage were used as a determining factors to determine the optimum latency period of H. longifilis. The result from these varying latencies period shows that the best latency periods at the ambient temperature of 26degreesC, that support mass production and higher survival of H longifilis ranges between 15-19 hours. There was low or zero hatchability from the egg stripped early and the one stripped late.
    Description: Includes:- 1 table.;8 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Hatching ; Survival ; Breeding ; Induced breeding
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    Some aspects of the physico-chemical parameters of Kontagora Dam, Niger State Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23319 | 19325 | 2018-03-30 15:34:16 | 23319 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The seasonal variations in the physicochemical parameters were studied from January, 2007 to December 2007, in Kontagora Reservoir, Niger State, Nigeria. The physico- chemical parameters were determined bi-monthly , using the following methods , temperature using mercury thermometer in degree centigrade, transparency using Secchi-disc , Pye Unicam model 292 meter used for pH and electrical conductivity. Dissolved oxygen by modified Winklerazide method, water hardness and Phosphate- phosphorus by method of Lind (1979), total alkalinity by standard method described by Boyd(l979) , Nitrate- Nitrogen by Phenoldisulphonic acid method. The rainy season mean values for water temperature, depth, pH, Nitrate-Nitrogen, were significantly (P〈0.05) higher than those for the dry season. However, for transparency, conductivity, dissolved oxygen, hardness, alkalinity, phosphate-phosphorus and total dissolved solid, the dry season mean values were higher than the rainy season mean value. As in most other Africa inland water bodies, there was seasonality in the physicochemical parameters variables. The torrential rains of the dam environment, the characteristics trade winds of the dry season, effect of deforestation, fertilizer application, herbicides, insecticide and other chemical factors might have contributed to the fluctuations of some of the physicochemical parameters detennined in the Reservoir.
    Description: Includes:- 2 tables.;1 fig.;39 refs.
    Keywords: Chemistry ; Nigeria ; Kontagora L. ; freshwater environment ; Physicochemical properties ; Seasonal variations
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    Assessment of feeds and feeding techniques adoption in Ijebu Ode zone of Ogun State Agricultural Development Programme, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23284 | 19325 | 2018-03-28 16:08:15 | 23284 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The study was conducted to assess the feeds and feeding techniques adopted in fish farming in the six extension blocks of Ijebu-Ode zone of the Ogun State Agricultural Development Programme, South Western Nigeria. The areas covered are Ala, Ago-Iwoye, Isonyin, Ijebu-Igbo, Ijebu-Ife and Ibi-Ade. Primary data were obtained from ninety fish farmers with well structed interview guides while combination of purposive and convenience sampling procedure was used in selecting the fish farmers. The result obtained showed that majority (34%) of the respondent fell within the economic active age distribution of 40-49 years, male (87%) married (90%:Christian 73.3%), tertiary education (47.7%), farming experience (54.4%), membership of cooperative society (63.3%),household size of above five (55.6%), annual income of above N51,000 (94.4%) and 34.4% of the respondents sourced their finance from personal saving. Most of the fish farmers adopted use of concrete tanks, intensive and semi-intensive culture system, culture Clarias and Heterobranchus species, produced about two tons per culture circle of six months. Majority (61.1%) of the respondents combine use of supplementary feed because of readily available desired feed.Recommendations are availability of credit and subsidies facilities, accessibility feed supplies, farmers’ cooperative, enabling government policies and farmers training and extension service provision.
    Description: Includes:- 8 tables.;3 figs.
    Keywords: Aquaculture ; Clarias ; Heterobranchus bidorsalis ; Nigeria ; Ogun State ; Fish Feed ; freshwater environment ; Feed ; Fish ; Fish culture ; Cultures
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    Local plant ingredients use in aquafeeds: a review (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23288 | 19325 | 2018-03-30 14:43:29 | 23288 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The cost of fish feeds can be significantly reduced if some locally available ingredients are incorporated in feed production. While soybean and maize remain best choices as plant protein and energy sources respectively, other less popular legumes reviewed in this paper can be used as substitutes, especially as partial replacers for these nutrient sources that have high food value for human population. Their use as human food makes soybean and maize relatively costlier than the winged, Psophocarpus tetragonolobus, Aacha, (Digitaria exilis), Cassia fistula and Bamara been shown to have good replacement values in diets for fish. It is recommended that more oils seeds; legumes and nuts suitable ingredients are found that they have little value as nutrient sources for human population, their cost will be less and this will enhance the profitability of the aquaculture enterprise.
    Description: Includes:- 28 refs.
    Keywords: Aquaculture ; Nigeria ; Fish feed ; freshwater environment ; Feed ; Feed composition ; Feed preparation ; Feeding experiments ; Chemical composition ; Feeding
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    Effect of feeding Colocasia (Colocasia esculenta (L) Schottl corn flour as a part of energy supplement on growth and nutrient utilization in Clarias gariepinus (Burchell, 1822) fingerlings (2021)
    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23297 | 19325 | 2018-03-30 15:00:59 | 23297 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The objective of this study was to compare the nutritive value of boiled Colocasia esculenta flour (CECF) with that of yellow maize in practical rations of fingerlings. Boiling resulted in a slight increase in crude protein content and significant (84.5%) decrease in oxalate content. Five is oproteic (30% crude protein) and isocaloric (15.46 Kjg-1) diets were formulated. The control diet contained maize as the principal dietary energy source, while flour produced from boiled Colocasia corn progressively replaced maize at 5 inclusion levels (0%, 20%, 40% 60% and 80%). The experimental diets were fed to triplicate group of Clarias gariepinus fingerlings (mean weight 2.05~c0.5g) at 3% body weight day-1. Growth performance expressed as weight gain, specific grown rate (SGR) and nutrient utilization expressed as feed conversation ration (FCR), protein efficiency ration (PER) were assessed. There was a trend of decrease in weight gain with increase in inclusion level of CECF. Weight gains of groups of C. gariepinus fed up to 60% inclusion level of CECF were nog significantly (p〉0.05) different from the group fed the control diet, the same trend was observed for SGR. FCR and other parameters were poorer (p〈0.05) in digestibility coefficients among the different groups, also that carcass composition did not vary significantly (p〈0.5) among treatments. Results also indicate that CECF is an acceptable ingredient that can replace maize up to 20% inclusion in C. gariepinus rations.
    Description: Includes:- 4 tables.;13 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Feeding experiments ; Nutritional requirements ; Nutrition ; Fish culture
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    Length-weight relationship and condition factor of Clarias anguillaris from the wild and cultured in Nigeria (2021)
    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23306 | 19325 | 2018-03-30 15:14:35 | 23306 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The correlation coefficient (R2) for Jos (cultured, Clarias anguillaris was 0.8367 while the coefficient of b was 3.1046. The correlation coefficient (R2) for Jos (wild) showed 0.7785 while the coefficient b was 3.4779. The correlation coefficient (R2) for Yola (wild) revealed 0.8637 and the coefficient of b was 2.4785. The results showed that there was correlation of length and weight in all the samples though Jos (cultured and wild) had positive allometric growth while Yola (wild) had negative allometric growth.
    Description: Includes:- 1 table.;1 fig.;9 refs.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Clarias anguillaris ; Nigeria ; freshwater environment ; Length-weight relationships ; Condition factor
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    Growth improvement of F1 generation of Clarias gariepinus through selective breeding (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23309 | 19325 | 2018-03-30 15:18:56 | 23309 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Selective breeding studies were carried out in four genetic mating combinations of Clarias gariepinus with the aim of improving its growth performance. F2 intraspecific and backcross were produced using the best male and female of the best genetic mating combination in the F generation in crosses of three wild strains of Clara gariepinus. The highest percentage hatchability (75%) was recorded in female Kainji parental and male Kainji F1. and the least (53.67%) in female and Male Kainji Fl. The cross involving female Kainji F1. and Male Kainji Parental had the best survival (49%) indoor and also best (38.67%) outdoor, while the least (37.67%) was recorded in female Kainji parental and Male Kainji F1 and also gave the least (32.67%) outdoor. The female Kainji F1, and male Kainji parental gave the best growth performance (1.61 g) at 19 days indoor rearing, while female and male Kainji parental gave the least (1.50g). At the end of seven months rearing outdoor, the female Kainji parental and male Kainji F1. gave the best growth performance of(222.49g) and the least (180.66) was recorded in female Kainji F1 and male Kainji parental.
    Description: Includes:- 3 tables.;2 figs.;14 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Fish genetics ; fish breeding ; freshwater environment ; Genetics ; Breeding ; Fish culture ; Growth rate ; Hybrid culture ; Hybrids
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    The growth response of fingerlings of O. niloticus in sublethal test to paraquat (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23316 | 19325 | 2018-03-30 15:28:47 | 23316 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The initial mean wet weight of the test fish were 7.64:~c 1.3 for the control and 6.33~c 0.9, 6.88~c 0.9 and 6.2~c 0.7 for the fish exposed to 1.02, 1.40 and 2.0mg/l of paraquat in water respectively. Growth was estimated from the sum of the individual wet weights of the fish at 2, 4, 6 and 8 weeks of exposure to the toxicant and expressed as percent Cumulative wet weight gain. The results showed that the cumulative percent wet weight gain in the control group increased from 10.34% at 1 week to 36.13% at 8 weeks. The growth of fish that were exposed to 1.02, 1.04 and 2.00mg/l increased from 3%, 0.44% and 1.55% at 1 week to 30.81 %, 9.59% and 19.81 % at week 8 respectively. A statistically significant difference in growth rate of the treated and control was observed (p〈0.05).
    Description: Includes:- 4 tables.;5 refs.
    Keywords: Aquaculture ; Pollution ; Oreochromis niloticus ; Nigeria ; Paraquat ; freshwater environment ; Fish culture ; Growth rate ; Growth ; Sublethal effects ; Toxicity
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    Fertilization, hatchability, survival and larval biometry in interspecific and intergeneric hybrids of Clariid catfishes (2021)
    Fisheries Society of Nigeria | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23322 | 19325 | 2018-04-06 15:44:54 | 23322 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Interspecific and intergeneric hybridization studies were carried out in H. longifilis, C. gariepinus and C. anguillaris under controlled hatchery conditions to estimate their aquaculture potential in terms of fertilizability, hatchability and survival. Fertilization rate in all the nine genetic crosses ranges from 60-87.5%, the fertilization rates of the parentals being significantly higher(P〈0.05) with highest value of 87.5% obtained in C. gariepinus. The intergeneric hybrids had the lowest rate of fertilization. Hatchability ranges between 75- 88.1 %, with the parental C. anguillaris being slightly significantly higher than the other genetic combinations. C. anguillaris x H. longifilis I had the lowest hatchability and there was no significant difference (P〈0.05) in percent hatching among the the interspecific hybrids. The survival of all the nine genetic crosses from hatching up to the end of the two weeks indoor rearing period ranges between 78-89%, which wasn't significantly different among the interspecific and intergeneric hybrids. C. anguillaris and C. gariepinus had the highest percent survival which was significantly different from all the other mating combinations. The intergeneric hybrid larval had significantly greater (P〈0.05) length in comparison to the interspecific hybrids. H. longifilis and the hybrids produced from its eggs had greater body weight than that of C. gariepinus and C. anguillaris
    Description: Includes:- 2 tables.;25 refs.
    Keywords: Aquaculture ; Fisheries ; Heterobranchus longifilis ; Clarias anguillaris ; Clarias gariepinus ; Nigeria ; New Bussa ; freshwater environment ; Fish culture ; Hatching ; Survival ; Interspecific relationships ; Hybrids ; Hybridization
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    Growth and production of fingerlings of Dutch Clarias gariepinus in indoor tanks in arid zone, Nigeria (2021)
    Fisheries Society of Nigeria | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23321 | 19325 | 2018-04-06 15:38:18 | 23321 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Study on the growth and percentage survival of seasonal induced breeding was carried out at the Federal College of Freshwater Fisheries Technology Baga. About 40,414 fingerlings were produced with percentage survival of 81.1 % at water temperature of 28degrees C between April and May, 2009. The average weight of fingerlings produced was 1.54 g with average standard and total length of 3.0 cm and 3.5 cm respectively. However, environmental factors that could hinder mass production of Dutch Clarias fry/fingerlings stocked at low and high stocking densities were monitored for eight weeks at 3.6 m2 indoor concrete tanks with water aeration using flow-through system. The percentage survival of 83.5% and 92.5% were obtained after the period of 8 weeks. The fry/fingerlings were fed with Artemia mixed with powdered feed of 35 % crude protein. The study shows that for Dutch Clarias fry/fingerlings production and management, smaller concrete tanks with flow-through mechanism are required and 3.6 m2 should not be stocked with more than 3,500 fingerlings per tank in the first 8 weeks before transferring them to production ponds. It was observed that apart from efficient water aeration, constant feeding and sampling of fingerlings will increase growth rate, increase resistance to disease and uniformity in size of the Dutch Clarias. The mean water temperature measured in this study ranged from 27.5degrees C in April and 28.5degrees C in May while pH ranged between 7.5 and 7.3 in April and May, respectively.
    Description: 4 tables.;8 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Baga ; freshwater environment ; Fish culture ; Freshwater aquaculture ; Pond culture ; Survival
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    Comparative studies on zooplankton production using different types of organic manure (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23456 | 19325 | 2018-05-04 17:45:41 | 23456 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study compares the species composition, diversity and abundance of zooplankton produced, using three different sources of organic manure as culture media. The study lasted for twenty-eight (28) days. Nine (9) concrete tanks, each of dimension 1m x 1m x 1m, were respectively filled with one hundred and fifty (150) litres of water from the same source and used for the study. The tanks were randomly grouped in threes and labelled A1 ? A3, B1 ? B3 and C1 - C3. Two kilograms of cow dung mixed with 1 Kg of humus tied in a porous bag was put into each of tanks A1 ? A3. Tanks B1 ? B3 received 2 Kg of poultry droppings and 1 Kg of humus while tanks C1 ? C3 received pig dung and humus in the same proportion. Zooplankton was harvested weekly by the horizontal trawl method, using a micro - filament plankton net of 50 ~km-1 mesh size and collected in a 50 ml glass bottle. The samples collected were stored in 10 % buffered formalin. Samples collected were identified and enumerated in the laboratory using a binocular dissecting microscope at a magnification of x100. Data collected were analysed, using one-way analysis of variance (ANOVA) and means were separated using Duncan’s multiple range test (DMRT). Mergerlef’s diversity indices was used to test for species diversity in each of the culture media. Result showed that total number of individuals produced was highest in cultures using poultry droppings. This was however not significantly different (P〉0.05) from those cultured using pig dung, but was significantly different (P〈0.05) from those cultured using cow dung. Result further revealed that cow dung produced more rotifers, poultry droppings produced more cladocera pig dung more copepods. In terms of species diversity, poultry droppings culture was more diverse and even, compared to those from the other cultures. Thus poultry droppings is the preferred media for use in zooplankton culture to feed fish and fish larvae.
    Description: Includes:- 2 tables.;13 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Zooplankton culture ; Cultured organisms ; Organic matter ; Food organisms
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    An overview of the importance of probiotics in aquaculture (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23467 | 19325 | 2018-05-05 12:43:00 | 23467 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Probiotics are live microbes that may serve as dietary supplements to improve the host. Development of probiotics in aquaculture will reduce the list of antimicrobial drugs which were prophylactic alone and which possess potential hazards to man who consume them. Probiotics was used to reduce mortality in fingerlings of some important fish. Probiotics is cost effective and useful despite the fact that its usefulness has not been proved in fishes unlike land animals.
    Description: Includes:- 11 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Microorganisms ; Food organisms ; Aquaculture
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  • 52
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    Productivity indicators and best management practices situation in aquaculture industry in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23472 | 19325 | 2018-05-05 12:54:38 | 23472 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A study was conducted in February to March 2010 to analyzed constraints and identifies research priorities for development of aquaculture in Nigeria. It incorporated a cross-sectional analysis of participatory approach involving consultations with relevant stakeholders across the five agro-ecological zones of Nigeria. Consultations were made with Research Institutes and their training arms, the Fisheries Colleges; Universities, the Federal Department of Fisheries, Fish Farmers’ Organizations (especially Catfish Farmers’ Association of Nigeria, CAFAN), Agricultural Development Projects (ADPs), Non-Governmental Organizations (NGOs), Fisheries Society of Nigeria (FISON), National Special Programme on Food Security (NSPFS), Input Dealers, some private farmers and the private sector focused Catfish Farming Development Programme of the International Finance Corporation (IFC). Extensive review of relevant literatures related to aquaculture development in Nigeria and global perspective was carried out. A component of the study was to analyze the situation of the industry in terms of productivity levels and best management practices compared with global standard. Findings reveal that the best practice ethics is not yet in place in the industry. This results in poorly designed fish culture facilities, improper management, low fish survival rate in hatcheries and production ponds, resulting in low productivity and poor returns on investment. The major constraints to the growth of the industry include low quality of consultancy services, high cost of imported feeds and drugs, high cost and scarcity of fast growing fish seeds, lack of access to finance, prevalence of diseases and pests, poor quality of consulting services and absence of guidelines to regulate conduct of business in the industry along the production and supply value chain. Although the Nigerian aquaculture industry boast of the largest manpower (in that sub-sector) in Africa; the quality of business development services are considered low. Research Institutes and Universities have regular funding problems for aquaculture research, poor infrastructures, and lack of exposures of staff to regular trainings to enable them be at par with global expertise on aquaculture development.
    Description: Includes:- 3 tables.;3 figs.;9 refs.
    Keywords: Aquaculture ; Nigeria ; Fish Culture Management ; freshwater environment ; Fish culture ; Pond culture ; Aquaculture techniques
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    Social structure of fish farmers in Osun State, South-West Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23473 | 19325 | 2018-05-05 12:56:09 | 23473 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: A survey of seventy-two selected fish farms in Osun State South-West Nigeria was carried out to determine the social status of the fish farmers. Structured questionnaires were used to collect information on age, educational background, marital status, mode of operation and type of culture embarked upon by the farmers among others. Data were analyzed using descriptive statistics. Results showed that most fish farmers (58.3%) in the state were male and were aged between 31-50 years old.91.7% of fish farmers were married and 95.8% had formal education. 63.9% adopted polyculture system. Tilapia and catfish were the two main species being cultured and 75% produced table fish while only 5.6% were involved in fish breeding. 83.3% practised fish farming on part-time basis and 66.7% were involved in non-agricultural occupation to supplement their production. 86.1% owned land either by inheritance or purchase, 8.3% operated on leased land and 5.6% rented the land upon which they operated. 75% of the respondents got their capital from personal savings, 11.1% from cooperatives, and only 5.6% had access to bank loans. 52.8% were regularly visited by extension agents 16.7% were occasionally visited while 30.5% were seldom visited. Only 27.8% belonged to farmers’ association.
    Description: Includes:- 2 tables.;1 fig.;10 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Osun State ; freshwater environment ; Fish culture ; Intensive culture ; Sociological aspects
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    Some haematological parameters of inter-generic hybrid of African catfish (Clarias anguillaris x Heterobranchus bidorsallis) juveniles and their pure lines in north eastern Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23471 | 19325 | 2018-05-05 12:53:21 | 23471 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Some haematological parameters of inter-generic hybrid African catfish (Clarias anguillaris x Heterobranchus bidorsalis) were investigated to assess the ability of the hybrids to withstand culture conditions in North East Nigeria. The result shows that packed cell volume (PCV), red blood cells (RBC), Haemoglobin (Hb), mean cell haemoglobin concentration (MCHC) and platelets (PLT) were higher in pure line Clarias anguillaris. However, white blood cell (WBC) and lymphocytes (LYM) were higher in female H. bidorsalis x male C. anguillaris (Heteroclarias) hybrid. PCV, MCHC, Hb, and RBC of all the fish species observed in this study were within the healthy ranges for fish. The results of this study shows that Heteroclarias have haematological competence for survival in culture conditions in the region.
    Description: Includes:- 2 tables.;59 refs.
    Keywords: Aquaculture ; Clarias anguillaris ; Heterobranchus bidorsalis ; Nigeria ; freshwater environment ; Haematology ; Hybrids ; Fish culture ; Haemoglobins ; Blood cells
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    Apparent nutrient digesibility coefficient of sunflower and sesame seed meal in Clarias gariepinus (Burchell 1822) fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23498 | 19325 | 2018-05-07 12:18:41 | 23498 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The apparent digestibility coefficient of raw sunflower (Helianthus annus). and sesame (Sesamum indicum) seedmeal by Clariid catfish (Clarias gariepinus) fingerlings was evaluated at 15,30 and 45% levels of replacement respectively using soybean meal based diets as control diet. There was significant difference (p〈0.05) in apparent organic matter digestibility (AOM), apparent protein digestibility (APD), apparent energy digestibility (AED) apparent carbohydrate digestibility (ACD) between the fish fed control diet and the fish fed test diets. However there was no significant difference (p〉0.05) in apparent lipid and fibre digestibilities of fish fed control diet and test diets RSF15 and RSM15
    Description: Includes:- 5 tables.;33 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Sunflower seed ; freshwater environment ; Digestibility ; Feeding experiments ; Experimental culture ; Nutritional requirements
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    Effect of replacing maize with cocoa pod husk in the nutrition of Oreochromis niloticus (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23500 | 19325 | 2018-05-07 12:21:15 | 23500 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study was carried out to evaluate the potential of cocoa pod husk CPH as a replacement for maize in the diet of Oreochromis niloticus (tilapia). Triplicated groups of 20 fish per plastic tank (replicate) with average weight of 0.9~c2g per fish were randomly allocated into 5 groups in a completely randomized design in an 8-week, trial. The treatment included the control diet (Diet E) having maize as the only major energy source and diet A in which maize was completely replaced with cocoa pod Husk, also Diets B, C, D contained different proportions of maize and cocoa pod husk which ranged from 10-30 in percentage. Result revealed that 100% maize substitution with CPH had no significant effect on survival, weight gain and feed conversion ratio at reduced cost. The study suggests that CPH could suitably substitute up to 100% maize in the diet of Oreochromis niloticus with an irresistible increase in profit margin.
    Description: Includes:- 5 tables.;27 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Feeding experiments ; Experimental culture ; Diets ; Feed efficiency ; Nutritional requirements
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    Preliminary study on comparative morphometry of Cynothrissa mento (Regan, 1917) from Ologe, Badagry and Epe Lagoons, Lagos, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23460 | 19325 | 2018-05-05 12:31:34 | 23460 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The morphometric characters of Cynothrissa mento from three major Lagoons (Ologe, Badagry and Epe) in Lagos, Nigeria were compared to assess the possibility of this fish species from the three Lagoons belonging to the same sub-population. The length-weight relationships (LWR), and condition factors (CF) of the fish were also described as well as the physico-chemical parameters of the three water bodies. The study was conducted between May, 2009 and April, 2010 and monthly sampling of fish and water was done in each sampling site. Seven7 physico-chemical parameters were assessed and these are; temperature, pH, salinity, turbidity, dissolved oxygen, total alkalinity and total hardness. A total of 294 specimens (Ologe 60, Badagry 174 and Epe 60) of C. mento were collected from the landings of the local fisher folks from the sampling sites. Seven morphometric characters; total length (TL), standard length (SL), body depth (BD), head length (HL), head depth (HD), eye diameter (ED) and interorbital width (IW) were measured. There was no significant difference (p 〉 0.05) in all the physico-chemical parameters measured among the sampling sites except pH. Coefficient of difference revealed that the C. mento from the three lagoons are uniform in all the morphometric parameters examined, which means that the specimens from the three sampling sites do not belong to different sub-populations. The growth coefficient/slope (b) values obtained for the fish species from the sampling sites ranged from 2.27 - 2.53, and differed significantly (p 〈 0.05) from 3, which indicates that most of the fish species have negative algometric growth.
    Description: Includes:- 4 tables.;1 fig.;24 refs.
    Keywords: Ecology ; Chemistry ; Cynothrissa mento ; Nigeria ; Ologe Lagoon ; Nigeria ; Badagry Lagoon ; Nigeria Epe Lagoon ; marine environment ; Population dynamics ; Morphometry ; Check lists ; Length-weight relationships ; Condition factor ; Physicochemical properties
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    Food habits, sexual dimorphism and sex ratio of three Palaemonid prawns of the Nun River, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23463 | 19325 | 2018-05-05 12:36:20 | 23463 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The food habits, sex ratio and differences of three freshwater prawns ? Macrobrachium vollenhovenii, M. macrobrachion and M. felicinum from Nun River, Niger Delta were studied. It was found that although the prawns had an omnivorous diet feeding on a wide range of organisms including plants, detritus, insect parts, phytoplankton and zooplankton the food habits indicate a tendency towards a plant-based (herbivorous) diet. The adult prawns exhibit sexual dimorphism with males being larger than females; however the males were fewer in number than the females with mean ratios of 1:2.79, 1:1.58 and 1:9.12 for M. vollenhovenii, M. macrobrachion and M. felicinum. Sexual dimorphism exists in the species and brood-stock are available in the Nun River system of the Niger Delta region.
    Description: Includes:- 3 tables.;12 refs.
    Keywords: Ecology ; Macrobrachium vollenhovenii ; Macrobrachium macrobrachium ; Macrobrachium felicinum ; Nigeria ; Nun ; R. ; freshwater environment ; Feeding behaviour ; Feeding experiments ; Aquaculture ; Sexual dimorphism ; Prawn culture
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    Survival, growth and feed utilization of the reciprocal hybrids of Clarias gariepinus (Burchell, 1822) and Heterobranchus bidorsalis (Geoffroy, 1809) in concrete tanks (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23466 | 19325 | 2018-05-05 12:42:05 | 23466 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: An experiment was conducted to determine the survival rate, fertilization rate, growth performance and feed utilization of the reciprocal hybrids of Clarias gariepinus and Heterobranchus bidorsalis. Two genetic crosses were made: C. gariepinus (male) x H. bidorsalis (female)(Clariabranchus) and H. bidorsalis male x C. gariepinusmale (Heteroclarias. The experiment was divided into two phases; artificial propagation of the fish species using synthetic hormone and rearing the fry for 14 days; and rearing the 14 days old fry for 35 days. In the first phase of the experiment, survival of frys were estimated in each experimental unit (genetic cross) while in the second phase, growth and nutrient utilization were investigated. The result revealed that the highest %fertilization, hatching rate and %survival occurred in H. bidorsalisfemale x C. gariepinus male (Heteroclarias) and the differences were significant (p 〈 0.05). Percentage weight gain and specific growth rate were significantly (p 〈 0.05) higher in Clariabranchus than Heteroclarias. Based on the result of this study, reciprocal hybrids of Clarias gariepinus and Heterobranchus, bidorsalis is recommended for commercial aquacultural practices.
    Description: Includes:- 3 tables.;13 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Heterobranchus bidorsalis ; Heteroclarias ; Nigeria ; Lagos ; freshwater environment ; Survival ; Growth rate ; Feed efficiency ; Genetics ; Fish culture
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    Effects of various latency periods on fertilization, hatchability and survival of Clarias gariepinus (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23470 | 19325 | 2018-05-05 12:50:15 | 23470 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The latency period of post-ovulation of Clarias gariepinus has been demonstrated to affect the viability of its eggs and embryos. This study has examined the effects of various latency periods on the viability of eggs, fertilization, hatchability and survival of the African catfish Clarias gariepinus. Progenies were produced using eggs successively stripped from the African catfish at 10, 12, 14, 16, 18, 20, 17, 14, 21 and 22 hours of post-ovulation. Some eggs and sperm were delayed while others were used fresh. Low survival, hatchability and fertilization rates were observed in treatments 1 and 3, while an average percentage of fertilization, hatchability and survival rates were obtained in treatments 2 and 4. High rates of fertilization and hatchability as well as a considerable rate of survival of progeny after 21days of indoor rearing was obtained in 14-hour latency period at a temperature of 24.8oC and was significantly different (P〈0.05). Therefore, any attempt to improve fingerlings production in Clarias gariepinus must consider the effects of latency period in relation to water temperature, and the best latency period achieved in this study was 14 hours.
    Description: Includes:- 4 tables.;8 refs.
    Keywords: Aquaculture ; Nigeria ; Abeokuta ; Hatchability ; Latency period ; freshwater environment ; Biological fertilization ; Hatching ; Ovulation ; Survival ; Breeding success ; Induced breeding ; Aquaculture techniques
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    Microfinance and aquaculture development for rural women in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23525 | 19325 | 2018-05-09 12:32:22 | 23525 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: In many developing countries, active agricultural production takes place in the rural areas. The exploitation of natural fish stocks is reaching limits and aquaculture production has not yet fulfilled its potential despite the large expanse of land in our rural areas. Social and economic indicators for developing countries consistently show that women bear the brunt of hardship in poor communities. The World Bank aims to reduce gender disparities by enhancing women’s participation in economic development. The recent transformation in the country pursues microfinance as a poverty alleviation tool capable of improving the living standard of the rural dwellers to promote their productivity. Globally, women constitute the majority of microfinance clients because of their consistent in their repayment records. In Nigeria about 98% of microfinance institutions are located in the urban areas, which make accessibility difficult for rural dwellers. This paper reveals the need for microfinance institutions in improving fish production through aquaculture, thus enhancing women empowerment and livelihood. The pursuance of this goal will in effect, affect socio-economics of rural women and urban drift of young women in search for greener pasture.
    Description: Includes:- 1 fig.;11 refs.
    Keywords: Aquaculture ; Management ; Nigeria ; Microfinace ; freshwater environment ; Financial institutions ; Financial resources ; Financing ; Aquaculture ; Women ; Fishery economics ; Aquaculture economics
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    The complementary roles of capture and culture fisheries in sustainable fisheries resource use (2021)
    Fisheries Society of Nigeria | Lagos (NIgeria)
    In:  http://aquaticcommons.org/id/eprint/23475 | 19325 | 2018-05-05 13:00:08 | 23475 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The pari parsu development and good management of both capture and culture fisheries if proactively practised especially in coastal and marine ecosystems would, to a large extent ensure sustainability in the usage of the fisheries resource, and conservation of biodiversity. While by-catch, discards and less desirable fish can continue to be useful inputs in aquaculture, the practice of environmentally sustainable aquaculture on the other hand would lead, not only to the reduction in pressure on the wild fish stock , but also become a source of socio-economic and technological development. The risk of weakened and reduced genetic diversity in aquaculture is being offset by enrichment of genetic pool from the wild fish population. In this review, the losses and gains of capture fisheries have been highlighted in addition to the gains and negative impacts of aquaculture. The success of capture-Based Aquaculture (CBA), enhanced fisheries, restocking and intentional introduction of fish species are all based on either branch of fisheries (capture and culture fisheries). The complementary roles both capture and culture fisheries can play to ensure optimal environmental usage and profitable use of the fisheries resource have been discussed. The strengths and weaknesses of both capture and culture fisheries can be wisely tapped for the development of both aspects of fisheries.
    Description: Includes:- 10 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; freshwater environment ; marine environment ; Fishery management ; Resource management ; Fisheries ; Fish culture ; Artisanal fishing
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    Comparison of maggot culture as aquafeed in sustainable aquaculture using different organic wastes (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23019 | 19325 | 2018-03-05 09:26:13 | 23019 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Abattoir waste, poultry dung and maize bran waste were collected, oven dried to constant weight and used for maggot culture. Maggot production was monitored for first occurrence time and collections were made after full production period. The sizes in length (cm) and weight (g) of maggot at full production capacity were measured and quantity produced computed for each substrate. This experiment lasted for four weeks. The results of the experiment showed that the shorter maggot first occurrence time of 48-72hours was recorded in fresh poultry dung waste and the highest time of 72-120 hours was recorded in fresh processed maize bran waste. There was significant difference between the first time of occurrence of maggot in these two wastes. The highest mean weight and length of 0.023 ~c:0.009g and 1.7 ~c0.55cm were recorded in maggot raised in fresh poultry dung waste. There was no significant difference (p〉0.01; p〉0.05) between the weight and length of maggot at full grown time when raised in fresh abattoir waste and fresh poultry dung. 22.89g of live maggotlkg of waste was raised in poultry dung followed by 14.93glkg waste from fresh abattoir waste and least of 6.79glkg of bran waste. The nutritive value of the maggot meal varied with each dung with maggot from poultry dung been the richest. Based on the result of this experiment effort could be more intensified using both abattoir waste and poultry dung to raise maggot meal for sustainable aquaculture practices.
    Description: Includes:- 4 tables.;1 fig.;11 refs.
    Keywords: Aquaculture ; Nigeria ; Maggot Culture ; freshwater environment ; Food organisms ; Wastes ; Cultured organisms
    Repository Name: AquaDocs
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    Format: 211 - 216
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    Separation of hatchlings from egg shells and unhatched eggs of Clarias gariepinus using incubating net hapa and survival of the hatchlings from broodstocks of varying sizes (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23021 | 19325 | 2018-03-05 09:08:00 | 23021 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Survival of C. gariepinus hatchlings from different sizes of brood stocks and separation of the hatchlings from egg shells and unhatched eggs using incubating net hapas were examined under indoor hatchery condition in glass aquaria tanks using well water. The net hapas were constructed using net with mesh size 1 mm which with held normal size or fully grown fish egg but allowed hatchlings from the eggs to pass out of the hapa into the incubating tank. The hapa facilitated easy separation of hatchlings from egg shells and dead eggs, only small undeveloped eggs passes through the hapa because they were smaller than the mesh size. The use of incubating net hapa with kakabans inside did not have any effect on incubation period, hatching and survival of the hatchlings. The eggs hatched normally within 24 hours at temperature range of 26 27degreesC. About 98% hatching and separation of the hatchlings from egg shells was achieved. Survival of hatchlings was enhanced because pollution due to decaying eggshells and unhatched eggs was eliminated. The same experiment was used to test survival of hatchlings from broodstocks of varying sizes (500gm, 350gm and 250gm). The survival and mortality rate of hatchlings from the three different brood stock sizes were 77.3% mortality, 22.7% survival, 75.9% mortality, 24.1% survival and 68.1% mortality, 31.9% survival for 500gm ,350gm and 250gm broodstocks respectively. Statistically, there was no significant difference (P〉0.05) in survival and mortality rate of hatchlings from different sizes of broodstocks. Fecundity obtained from the brood stocks were 42,972; 50,925 and 80,878 for 250g, 350g and 500g broodstocks, respectively.
    Description: Includes:- 4 tables.;1 plate.;11 rfs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Fish culture ; Hatching ; Eggs ; Hatcheries ; Incubators ; Floating cages ; Survival ; Length-weight relationships
    Repository Name: AquaDocs
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    Performance of Heterobranchus longifilis fingerlings fed maggot meal-based diets in miniflow through system (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23020 | 19325 | 2018-03-05 20:30:27 | 23020 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The growth response, nutrient utilization, cost benefits and haematological responses of two hundred and fifty (250) Heterobranchus longifilis fingerlings fed maggot meal based diets were evaluated for 70 days in mini flow through system. Twenty fingerlings were stocked in triplicate in fifteen mini flow through system of plastic tanks of fifty (50) litres capacity and coded MM1 - MM5 in relation to their diet name. Five isonitrogenous (40.0%) and caloric content (2017.S 2092.3kJ/100g) maggot meal based diets namely MM1 O%maggot meal, MM2 25% maggot meal, MM3 -50% maggot meal, MM4- 75% maggot meal and MM5- 100% maggot meal were used for the experiment. The higher the proportion of maggot in the meal, the higher the ether extract and crude fibre. No significant difference (p〉0.05) existed between ash content of the experimental diets. Diet MM2 had the best growth performance and highest MGR with a significant difference (p〈0.05) with other diets fed fish. No significant differences (p〉0.05) existed between the growth parameters for diets MM1 MM3 and MM4 A positive correlation (r = 1.0) existed (p〈0.05, 0.25) between the growth parameters for the different experimental diets. Highest correlation (r =0.9981) existed p〈0.05 between MGR within the treatments. Highest Haematocrit (23%) Haemoglobin content (7.68g/dl) and whole blood clotting time (46 see) were recorded from H. longifilis fed MM5. Without any reservation, inclusion of maggot based meal diet is recommended as feed in the diet of H. longifilis to 75% replacement of fish meal for growth and better healthy condition so as to ensure sustainable aquaculture in Nigeria.
    Description: Includes:- 3 tables.;1 fig.;26 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Maggot meal ; freshwater environment ; Fish culture ; Food organisms ; Diets ; Feed efficiency ; Growth rate ; Haemoglobins
    Repository Name: AquaDocs
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    Economics of fish farming in Owerri agricultural zone of Imo State (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23025 | 19325 | 2018-03-05 09:25:29 | 23025 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A study of the economics of fish farming in the Owerri Agricultural zone of Imo State was carried out. Simple random sampling technique was used in the selection of 30 fish farmers from the zone. Data were collected using structured questionnaire while descriptive statistics and multiple regression analysis were used for analysis. The study showed that majority of the farmers (51.20%) intensively managed their fish farms which were mostly homestead concrete ponds. The application of cost and return analysis showed that fish farmers in the zone made positive net gain from the two different pond types studied, with 4.22% in homestead pond and 49.13% in commercial concrete pond. The study recommended that investors and fish farmers should adopt intensive fish farming in commercial concrete ponds as it was found to be very profitable.
    Description: Includes:- 4 tables.;11 refs.
    Keywords: Management ; Aquaculture ; Nigeria ; Imo State ; freshwater environment ; Fishery economics ; Fish culture ; Cost analysis
    Repository Name: AquaDocs
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    Toxicity of heavy metals to fish: an important consideration for sucessful aquaculture (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23033 | 19325 | 2018-03-05 09:12:27 | 23033 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Heavy metals are toxic to man, animals and plants once safe limits are exceeded. Then ability to bio accumulate in plant and animal tissues makes them particularly hazardous. Heavy metals are toxic to all aquatic biota and cause high mortality of fish larva, fry, fingerling and adult fish. They accumulate in the gills, heart, liver, kidneys, brain, bones and muscles of fish. The physico-chemical forms of heavy metals determine their mobility, availability and toxicity to fish. These metals enter aquaculture systems through various means (polluted water, storage facilities, fish feed, atmospheric deposition, etc) and constitute a factor detrimental to successful aquaculture. This paper reviews the mode of entry, transport and toxicity of some selected heavy metals to freshwater fish. Methods for the determination of these metals in water, fish and sediment samples are also presented. Ways of preventing their entry into aquaculture systems together with the safe limits of concentration of these metals in aquaculture systems are also included.
    Description: Includes:- 2 tables.;23 refs.
    Keywords: Pollution ; Aquaculture ; Nigeria ; freshwater environment ; Heavy metals ; Toxicity ; Pollution effects ; Fish culture
    Repository Name: AquaDocs
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    Comparative effect of alternative feed materials with Artemia in the diet of Clarias gariepinus larvae (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23035 | 19325 | 2018-03-05 09:15:11 | 23035 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A 35-day feeding trial was conducted to compare and evaluate nine first feeds for Clarias gariepinus. The nine feedingstuff materials contained more than 40% crude protein. Artemia, coppens and fishmeal were used as single protein sources. Fish egg meal, cattle liver meal and shrimp meal were supplemented with yeast alone or yeast combined with folic acid. Twenty fish larvae were kept in plastic bowls with replicate for each treatment inside the laboratory. Feeding commenced after yolk absorption. Each diet was fed to fry twice daily to apparent satiation. Percentage survival at the end of the experimental period ranged between 0% and 100% for fish on fish egg supplemented with yeast and folic acid and liver meal with yeast respectively. Fish fed artemia had the highest weight while those on shrimp meal supplemented with yeast had the least. Highest specific growth rate was in fish fed fish egg supplemented with both folic acid and yeast. The cost of rearing Clarias gariepinus larvae can be appreciably reduced by using non conventional protein sources, which are locally available, for feed preparation.
    Description: Includes:- 4 tables.;1 fig.;14 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Feeding experiments ; Feed efficiency ; Diets ; Food organisms
    Repository Name: AquaDocs
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    Evaluation of rice-fish culture in south eastern Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23038 | 19325 | 2018-03-05 20:33:51 | 23038 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A rice-fish culture trial was conduct in Umudike, Southeastern Nigeria, using FARO 44 rice variety Oreochromis niloticus and in six plots (198 m2 each'). Two treatments, sole rice and rice-fish culture were employed with each treatment replicated three times. Juveniles of O. niloticus with mean weight 12 g were stocked at the rate of 2/m2, four weeks after transplanting four- week -old rice seedlings using 20 cm inter and intra row spacing. Basal fertilizer (NPK 20:10:10) was applied at the rate of 300 kg per ha while 20 kg per ha urea was used as top dressing. Brewery spent grain was used as supplementary feed at the rate of 2% body weight of fish once daily. The fish and rice were harvested after 80 days of culture and 108 days after transplanting, respectively. The rice fish culture gave an average yield of 1125.25 kg per ha and 2433 kg per ha for fish and rice respectively. The sole rice treatment had an average yield of 2510 kg per ha. Since the integration of fish in the rice plots did not significantly (P〈0.05) reduce rice production, adoption of this system will not only lead to increase in animal (fish) protein production but also generate additional income to farmers.
    Description: Includes:- 1 table.;16 refs.
    Keywords: Aquaculture ; Nigeria ; South East ; freshwater environment ; Rice field aquaculture ; Agropisciculture ; Fish culture ; Rice fields
    Repository Name: AquaDocs
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    Format: 279 - 282
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    Physico-chemical characteristics and zooplankton community of a dug-out pond in Ekpoma, Edo State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23043 | 19325 | 2018-03-05 20:43:40 | 23043 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The physico-chemical characteristics and zooplankton community of a dug-out pond along Ukhun Road, Ekpoma, Edo State was studied for a period of six months (August, 1999 January, 2000). Composite water and zooplankton samples from different sections of the pond were taken for the study, at fortnightly intervals. The range of values observed for the parameters were temperature 28-31 degrees C (air) and 25-28 degrees C (water); Electrical conductivity (36.50-67.30 Scm-1) TSS 0.190.99mg/l; TDS (14.20-33.4mg/l); pH (6.15-6.70); DO (4.6-9.3mg/l); BOD (2.2-4.9mg/1); Chlorinity 35.50ppm); Total alkalinity (42.7-67.10mgCaC03); Phosphate-phosphorus (4.43-7.18mg/l) and Nitrate-Nitrogen (0.4-0.95mg/l). Heavy metals concentrations were generally low except for iron, which was moderately high. A total of 9 taxa and 696 individuals of zooplankton were collected. The major zooplankton groups identified were copepoda, cladocera and Rotifera The order of dominance exhibited by those major groups in this pond were cladocera 〉 copepoda 〉 Rotifera. The results revealed that such water body is suitable for fish culture.
    Description: Includes:- 3 tables.;15 refs.
    Keywords: Aquaculture ; Ecology ; Nigeria ; Ekpoma ; freshwater environment ; Physicochemical properties ; Zooplankton ; Dominant species
    Repository Name: AquaDocs
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    Recent developments on non-conventional fish culture media in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23048 | 19325 | 2018-03-06 15:24:58 | 23048 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Isolated successes have been recorded in fish farming in some African countries with observable potentials in Nigerian marine waters. In Nigeria, aquaculture is a recent development and it has been practised in conventional culture media, which are land borne while non conventional ones are mainly water borne. The need to use non-conventional culture media is based on the constraints encountered by using the conventional culture media. The fish farms constructed in the 1950's were constructed in isolated and far away home locations hence, theft was rampant in these poverty stricken localities. Cultural land acquisition practices entrenched in the society also make it difficult for non-indigenes, the youths and the poor who are interested in fish farming to acquire land for their fish culture projects. The acquisition of the technical know - how requires the full and consistent support of government and financial institutions for bridging the deficiency between the supply and the demand of fish in the country. Both conventional and non-conventional culture media struggle with such constraints as in availability of good feeds, inadequate quantity and quality supply of fingerlings to stock the media, and largely the underutilization of available water resources in Nigeria. Several countries in Asia and other parts of Africa have succeeded in improving the fish production and protein intake of their populations through the utilization of cheaper non-conventional culture media like the homestead pond, pens and cages. Nigeria can also do the same if the challenges and constraints highlighted are tackled.
    Description: Includes:- 11 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Fish culture ; Culture media
    Repository Name: AquaDocs
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    Changes in the proximate composition of smoked and sundried Atya gabonensis (Irvine) from Lower River Benue, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23059 | 19325 | 2018-03-06 15:38:43 | 23059 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The proximate composition of the fresh water shrimp Atya gabonensis (Irvine), preserved by smoking, salting and sun - drying was determined and compared to the fresh shrimp. All the preservation methods significantly (p〈 0.05) increased the total dry matter (38.34 93%), protein content (17.31 48.9) and ash content (28.36 36.17%) over the fresh shrimp value. Moisture and lipid contents however, were reduced from the fresh shrimp's 61.66% and 25.29% to low value of 7.00% and 5.10% respectively. The preserved shrimp is, therefore, nutritionally superior to the fresh shrimp as preservation enhances its proximate composition. Of all the preservation methods used in this work, smoking is the best. It recorded the best preservation indices of lowest moisture content, higher dry matter, higher protein content and highest ash content.
    Description: Includes:- 1 table.;13 refs.
    Keywords: Fisheries ; Chemistry ; Atya gabonensis ; Nigeria ; Benue R. ; freshwater environment ; Lipids ; Organic compounds ; Proteins ; Ash content ; Cured products ; Fish ; Shrimp fisheries
    Repository Name: AquaDocs
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    Preliminary studies on the effects of varying levels of aeration on the growth and physiological processes of cultured Clarias gariepinus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23023 | 19325 | 2018-03-05 20:32:22 | 23023 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: To determine the aeration regime and the resultant dissolved oxygen input that imposes the least physiological stress on homeostatic mechanisms of C. gariepinus fingerlings, were culture in the laboratory under 24 hours of continuous aeration and inputing a mean of 8.2 mg/l of 02; 12 hours of aeration (mean of 4.6mgO/l2); and zero-aeration (mean of 1.2 mgO/l2)' Survival rate, growth rate and mean weight gain per day were highest in the 4.6 mgO/l2 culture whereas, the other two cultures were characterized by higher mortality rates and insignificant growth rates. The haematological profile analyzed showed varying degrees of changes in the blood parameters of the fish cultured under varying levels of aeration and their inputed dissolved oxygen levels.
    Description: Includes: 3 tables.;19 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Aeration ; Fish physiology ; Biological stress ; Haematology
    Repository Name: AquaDocs
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    Adoption of fish farming practices by women in Lagos State (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23064 | 19325 | 2018-03-06 15:45:22 | 23064 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The involvement of women in aquaculture in Lagos State was studied. One hundred and fifty copies of the questionnaire were administered to women fish farmers, randomly selected from three local government areas of Lagos state. These were Ojo, Ibeju Lekki and Epe local government areas of Lagos State. The study revealed that 52% of the women adopted concrete pond system, 24% adopted dug-out or earthen pond system, 10% fibre glass tanks and 14% adopted Water Recirculatory/Flow-through system of fish farming. Other fish farming technologies that were included in this study were: stocking rates, feeding regimes and feed types, water quality management, general management of the farm, security, harvesting and marketing. These are the fish farming technologies that have been disseminated by the Nigerian Institute for Oceanography and Marine Research to women fish farmers. An average of 2 metric tonnes of fish per annum was calculated for each woman fish farmer in Lagos State. The bio-data of the women studied showed that fish farming can be practised by every woman, irrespective of age, educational standard, location, religion, finacial status and culture, as long as there is a good source of water supply).
    Description: Includes: 3 tables.;6 refs.
    Keywords: Aquaculture ; Nigeria ; Lagos State ; freshwater environment ; Fish culture ; Women ; Pond culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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