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  • 1
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    Effects of crude oil and the fractions on the blood haemoglobin and neutrophil concentrations in Heterobranchus bidorsalis juveniles (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22997 | 19325 | 2018-03-05 09:06:04 | 22997 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Studies on the effects of crude oil and its fractions on the blood haemoglobin (HB) neutrophil (NP) concentration in the blood of Heterobranchus bidorsalis juveniles were carried out. Two study periods (toxicity and recovery) and four oil types (Bonny-light crude oil (BLCO), premium motor spirit (PMS), kerosene (DPK) and lubricating engine oil (lBO) at 1.00, 2.00, 4.00 and 8.00ml were used. There were significant differences (P〈0.05, p〈 0.01) on the HB and NP values in blood of fish samples. The elevated values of HB levels in fish exposed to 2.00,4.00 and 8.00m1 L-1 BLCC, 2.00ml L-1 PMS and DPK; and 4.00ml L -1 LBO over the levels in the control fish were in consonance with the results of other workers. Increases in NP values in fish exposed to the four oil types (BLCO, PMS, DKP and LBO) relative to the control could be part of the immunological attempts by the fish to mobilize the body's defence mechanisms. The relatively high percent mortality and low survival of H. bidorsalis juveniles exposed to 4.00 and 8.00mlL-1 concentration of the four oil types over the other concentration implied that these concentrations were probably lethal to fish existence.
    Description: Includes:- 4 tables.;23 refs.
    Keywords: Fisheries ; Health ; Pollution ; Heterobranchus bidorsalis ; Nigeria ; Delta State ; freshwater environment ; Crude oil ; Fish ; Toxicity ; Haemoglobins ; Lethal effects
    Repository Name: AquaDocs
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    Format: 152 - 159
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  • 2
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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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  • 3
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    The role of information in harnessing fisheries and eco-tourism for national development (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23001 | 19325 | 2018-03-05 09:29:09 | 23001 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The importance of information in every sector cannot be over-emphasized. The ability to identify and utilize our natural endowment depends on the availability of information resources within or at the right time. The low level of information provision in Nigeria is attributed to infrastructure as a result of inadequate funding of the sector. Research has shown that information has revolutionized the society, moving the world from the industrial age to the information age and completely changing the way the economy functions. Success goes with the best information. However, for now, if there must be increase in fish production and eco-tourism participation, employment opportunities, poverty reduction, food security and nature appreciation in terms of environment and living creatures, our fisheries scientists and policy makers will have to rely on sources of information using the advantage of libraries, and Information Communication Technology (lCT). This development in information resources affects many areas of Nigerian economy including the fisheries and eco-tourism sectors. The contribution of information resource in the development of the fisheries sub-sector can be viewed under those of fisheries information products like the Nigerian Fisheries and Aquatic Sciences. (NIFFIC) database, Proceedings of national conferences of Fisheries Society of Nigeria (FISON), annual and technical reports Fisheries Research Institutes in Nigeria. Also to be brought under perspective is the information products of eco-tourist institutions like the Nigerian National Parks.
    Description: Includes:- 1 table.;1 fig.
    Keywords: Fisheries ; Information Management ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Information services
    Repository Name: AquaDocs
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    Format: 178 - 182
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  • 4
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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
    Type: conference_item , TRUE
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    Format: 270 - 275
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  • 5
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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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  • 6
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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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  • 7
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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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  • 8
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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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  • 9
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    Assessment of capital assets and utilization amongst artisanal fishers in Tatabu fishing community (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23054 | 19325 | 2018-03-06 15:33:34 | 23054 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Sustainable development in Tatabu fishing community can hardly be attained without a systematic socio-economic consideration of the productive activities and development needs of the people. Generally two important factors play a great role in rural livelihoods; the prevailing structures and processes and access to assets, which can be combined in a various ways to generate positive outcomes. In essence poverty and the opportunity to escape from it depends on all the above. The assets comprise of human, natural, social, physical and financial. The present study (emperically analyzed their strength, linkages and the effects of policy and structures on them, particularly as it translates to the socio-economic well-being of the fishers.
    Description: Includes:- 3 tables.;9 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Tatabu L. ; Livelihood ; freshwater environment ; Artisanal fishing ; Investments ; Financial resources ; Fishery economics ; Labour
    Repository Name: AquaDocs
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    Format: 353 - 358
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  • 10
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    Effects of insects infestation on the shelf-life of smoked dried fish: a review (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23057 | 19325 | 2018-03-05 20:48:39 | 23057 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Most of the fish produced in Nigerian fresh-water systems are marketed as dried fish, since there are few alternative methods of preservation for distant markets. Considerable quantities are lost through insect infestation, fragmentation during sorting, mixing, storage and transportation. In Nigeria, a high proportion of the dried fish sold in the market harbours beetle infestation, mainly Dermestes maculatus and Necrobia rufipes. D. maculatus is the dominant pest, accounting for 50.0%. The larvae of both beetles are the most numerous forms and are responsible for a large proportion of the damage of dried fish.
    Description: includes:- 7 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Aquatic insects ; Infestation ; Cured products ; Dried products ; Storage life
    Repository Name: AquaDocs
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    Format: 369 - 372
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  • 11
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    Consumers' preference of fish products in Yenagoa metropolis, Bayelsa State (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23055 | 19325 | 2018-03-06 15:35:00 | 23055 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The study was conducted to assess consumer's preference of fish products in Yenagoa Metropolis, Bayelsa State. One hundred and ninety consumers were randomly selected for the study. Results showed that fishery products in Yenagoa metropolis include fresh, smoked, fried, dried, canned and frozen fish. Sixty-eight percent of the respondents said that the products are enough, whereas seventy-six percent feel the variety of fishery products is low. Majority of the respondents (86%) preferred fresh fish followed by smoked fish which was preferred by sixty-four percent of the respondents. Age, ethnic grouping, gender, marital status and education did not have any significant influence on the preferences of the consumers (P〉O.05). Major problems identified by the consumers were exorbitant prices of fish because of the activities of middlemen, unhygienic selling environment and scarcity of fish products. Consequently, it is recommended that an adequate system of financing small scale fisheries be evolved to reduce the influence of middlemen; sanitary laws should be enacted and enforced in the fish markets around the metropolis; Establishment of modern fish markets in Yenagoa to boast fish production, aquacultural investors should be attracted.
    Description: Includes:- 3 figs.;9 refs.
    Keywords: Fisheries ; Nigeria ; Yenagoa ; freshwater environment ; Fish utilization ; Fishery products ; Consumers
    Repository Name: AquaDocs
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    Format: 359 - 362
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  • 12
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    Comparison of the quality of smoked Tilapia using mud kiln and modified drum kiln (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23060 | 19325 | 2018-03-06 15:40:12 | 23060 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Fresh tilapia (Oreochromis niloticus) was smoked using two different kilns to evaluate and compare the microbial changes or quality, physicochemical and organoleptic characteristics. Smoked samples were dominated by Gram-positive bacterial, flora, Bacillus, Streptococcus and Staphylococcus. Fungi isolated included Aspergillus spp, and Penicillium spp. The two kilns used in smoking are Modified Drum Kiln (MDK) and Mud kiln (MK). The MDK had a higher impact on the total viable count (TVC) and reduced the TVC of the fresh sample by 37.5% while the MK reduced it by 29.5%. In a similar trend the MDK reduced the number of Staphylococci and fungi by 43.3% and 33.8% respectively while the MK only reduces them by 30.9% and 26.3% respectively. Statistical test indicated significant difference (P〈0.05) in the microbial load of fish processed in the two kilns. However, the reduction of the Coliform by the two smoking kilns is not significantly different.
    Description: Includes:- 3 tables.;10 refs.
    Keywords: Fisheries ; Nigeria ; Smoked fish ; Smoking Kiln ; Tilapia ; freshwater environment ; Cured products ; Processed fishery products ; Quality ; Microbiological analysis
    Repository Name: AquaDocs
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    Format: 381 - 385
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  • 13
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    Effect of cold and hot smoking of Clarias gariepinus on consumer preference (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23062 | 19325 | 2018-03-10 14:32:20 | 23062 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The objective of this study was to determine the best smoking method that will enhance consumer preference for Clarias gariepinus without affecting negatively the nutritive value. Two methods of smoking were used: cold and hot smoking. The fish were smoked with improvised drum smoking kiln and oven. Smoked fish samples obtained were subjected to chemical analyses and sensory evaluation. Chemical analyses showed that the smoked fish were still rich in protein (66.0067.52%) and fat (9.83-12.28%); while the moisture content ranged between 7.82-8.24% and ash, 12.86-14.16%. There was no significant difference (P〉0.05) in the protein, ash and moisture contents. Significant differences (P〈0.05) were observed in the Calcium(Ca), Potassium(K), Sodium(Na), Zinc(Zn), Lead(Pb), Iron(Fe) and Phosphorus(P) contents. Only hot smoke-dried (HSD) fish samples showed no presence of lead. The levels of sodium(Na) and potassium(K) in the smoked fish were relatively high, though, the amount of potassium(k) was higher. Sensory evaluation results revealed that there were no significant differences (P〉0.05) in the colour and taste ratings of the smoked fish samples. However, significant differences (P〈0.05) were observed in the odour, texture and overall acceptability. Hot smoke-dried and cold oven-dried Clarias gariepinus had the best overall acceptability in ratings.
    Description: Includes:- 1 table.;2 figs.;12 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Fishery products ; Processing fishery products ; Cured products ; Curing ; Mineral composition
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  • 14
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    Women in frozen fish marketing in Lagos State: strategies and methods (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23067 | 19325 | 2018-03-10 14:36:09 | 23067 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Lagos state has a major sea port for landing of frozen fish from Mauritania, Senegal, the Scottish waters and other European countries. In the last three years, the dense population of the state has encouraged all kinds of trade to thrive. Fish as a major food in many Nigerian diets has been known to complement the high carbohydrate intake of majority of the Nigerian populace because of the unaffordable prices of beef in the market. The market for frozen fish is rich in Lagos. It has provided many women fishmongers a livelihood for over a decade. They have been able to sustain their families and improve their social status over the years. This study reports the modus operandi of the trade. The study covered a period of three months. Fish sales were monitored in Epe, Oyingbo, Ijora and Alaba markets. The cooperation of the heads of markets (Iya Olojas) were requested at every market. It was ensured that observations and the interviews/questionnaires do not interfere with the women's activities. Specific areas focused upon in the study included countries of fish imports, most acceptable species, packaging, purchase price, sales price and profit margins. Other important factors in the fish market that were studied included entrance into the fish marketing business, sources of finance and problems. The study also made suggestions on how to improve upon the fish marketing business of women in Lagos State.
    Description: Includes:- 1 table.;3 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Lagos State ; Frozen Fish ; freshwater environment ; marine environment ; Women ; Frozen products ; Processed fishery products ; Marketing ; Chilling storage
    Repository Name: AquaDocs
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    Format: 409 - 412
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  • 15
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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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  • 16
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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
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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
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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
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    The length weight relationship and condition factor of the Banded Jewel fish (Hemichromis fasciatus Peters) from Kainji Lake, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23214 | 19325 | 2018-03-25 12:46:05 | 23214 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The length weight relationship and condition factor of Hemichromis fasciatus from Kainji Lake was studied. One hundred and twenty seven fish samples of total length ranging from 6.50cm 15.50cm and weigh between 4.00g and 60.00g collected between August 2006 and June 2007 were analyzed. Results showed that a, b and r - values were 0.0042, 3.442 and 0.966 respectively, while the condition factor (CF) values varied from 0.67 2.42 with mean of 1.203. The fish exhibited positive allometric growth pattern. The condition of the lake is favourable for the survival of the fish species.
    Description: Includes:- 2 tables.;1 fig.;15 refs.
    Keywords: Ecology ; Fisheries ; Hemichromis fasciatus ; Nigeria ; kainji L. ; freshwater environment ; Length-weight relationships ; Condition factor
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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
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  • 21
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    Public health implications of Gurara River around Izom environs, Niger State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22999 | 19325 | 2018-03-05 09:30:30 | 22999 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Water samples were collected from River Gurara around the Gurara Falls and Izom settlement once every month for a period of twelve (12) months (June 2004 May 2005). Microbial studies were carried out on the water samples collected. There were marked variations between different samples, stations and seasons. The microbial studies showed the presence of enteric gram negative, gram positive and pyogeric groups of bacteria. Some species of indicator organisms were recorded. The results obtained showed that the activities of Izom populace has some impact on the water quality and public health status of River Gurara
    Description: Includes:- 2 tables.;12 refs.
    Keywords: Biology ; Conservation ; Health ; Nigeria ; Gurara R. ; freshwater environment ; Public health ; Microbiological analysis ; Bacteria ; Fungi
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  • 22
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    Effect of different concentrations of bonny-light crude oil on alanine kinase and alanine transaminase enzyme activities in Heterobranchus bidorsalis juveniles (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22998 | 19325 | 2018-03-05 20:41:44 | 22998 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The effect of exposing juveniles of Heterobranchus bidorsalis (Geoffroy St. Hilaire, 809) (mean weight: 15.02~c:0.14g) to different concentrations of Bonny-light crude oil (BLCO) on alanine kinase and alanine transaminase activities were studied. The exposure of the fish to 1.00, 2.00, 4.00, 8.001L-1 BLCO and a control (0.00m1 L-1) within 4 days toxicity and 42 days recovery periods indicated that the significant increases (P〈0.05; P〈0.01) in the serum alanine transaminase (HCAT) activities were dependent on the BLCO concentrations. The reduced SAK and (HCAK) activities noticed within the first 14 days recovery period implied that the removal of the oil pollutant probably lowered the pressure on the SAK and HCAK to participate in the metabolism of ingested carbohydrate. The significant increases in the serum alanine transminase (SAT) and the hepatic cytosolic alanine transminase (HCAT) activities in the fish corresponded with the trend shown by the SAK and HCAK activities. Generally, the increased activities of SAK, HCAK, SAT and HCAT in H. bodorsalis juveniles in this study might be due to a shift in the carbohydrate metabolism of the fish caused probably by the crude oil exposure.
    Description: Includes:- 3 tables.;31 refs.
    Keywords: Fisheries ; Health ; Pollution ; Heterobranchus bidorsalis ; Nigeria ; freshwater environment ; Crude oil ; Toxicity ; Fish ; Serum ; Serological studies ; Alanine ; Cytotoxicity
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    Inland fisheries in Nigerian economy: issues and challenges (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23000 | 19325 | 2018-03-05 09:29:49 | 23000 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The Nigerian economic development process has suffered from dearth of holistic approaches and misprioritization of programmes and projects, which lead to the realization of partial and unsustainable growth of other important sectors and sub sectors of the economy potentials for economic emancipation. The contributions of fisheries to the economic growth in terms of food security, employment, income and GDP have not been well recognized. The sector has been ignored for long prior to the recent NEPAD summit (which implementation is yet to take proper shape). Fisheries are still undeveloped and fisher folks are today amongst the poorest in Nigeria. The present paper reviews the Nigerian economic situation, the role of fisheries in the economy, issues, challenges and opportunities with the view to fostering growth of the sector and national economic development.
    Description: includes:- 1 fig.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Fishery development ; Fishery management ; Fishery policy
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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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    Preliminary study on the aspects of the biology of snakehead Parachanna obscura, in a Nigerian wetland (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22993 | 19325 | 2018-03-03 07:07:14 | 22993 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Between October 2000 and March 2001, a preliminary study on the aspects of the biology of 〈i〉Parachanna obscura〈/i〉, was investigated. Sex ratio revealed female preponderance [X〈sup〉2〈/sup〉=4,7338, df =1, p〈0.05]. There was a seasonality in sex ratio during the wet season whereas there was seasonality increase in number of females over males [x〈sup〉2〈/sup〉 = 4.735, df = 1, p = 〈 0.05]. A curvilinear plot was obtained in the regression of the total length and total weight TW = 0.018621 TL〈sup〉2697〈/sup〉,n= 408, r = 0.869, [p〈0.001]. Trophic spectrum of 〈i〉C. obscura〈/i〉 [size range 9.0 18.0 cm comprises food items. The items were re-classified into seven major groups consisting of detritus [coarse fine detritus], fish juvenile and remains of fish], Insecta [un-identified adult and remains of insects, macrophyte materials, mud, Oligochoetes [earth-worm], and abiogenic sand. Fish, insects Oligochoetes were eaten as primary foods items. There was a complete ingestion of the array the dietaries by both sexes. Exception of one item [coarse detritus] during the wet season,〈i〉 P. obscura〈/i〉 consumed all the dietaries during the seasons. Nevertheless, the later season increased in the ingestion of 9 out of the 10 items in conformity with optimal foraging theory. 〈i〉Parachal obscura〈/i〉 is considered as piscivore-insectivore-invertivore in feeding habits. In the wake of doubts about the viability and prospects of aquaculture, farming of 〈i〉P. obscura〈/i〉 is a possibility. This species possesses a number of positive attributes with regards to aquaculture. It is likely that efforts to culture this hardy carnivorous and fast-growing fish will spread in the coming years in Nigeria, breeders and fish farmers will likely give it a chance.
    Description: Includes:- 2 tables.;9 refs.
    Keywords: Biology ; Fisheries ; Parachanna obscura ; Nigeria ; Akwa Ibom ; Snakehead Fish ; freshwater environment ; Fishery biology ; Length-weight relationships ; Feeding behaviour ; Stomach content ; Seasonal variations
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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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    Design and construction of an improved canoe for lake fishery (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23052 | 19325 | 2018-03-06 15:30:49 | 23052 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A 3.6m length overall (LOA) flat bottom canoe similar to the one commonly used for fishing in Kainji Lake, but with some modifications, was designed and constructed using locally available materials. The improvements/modifications over the local canoe include inbuilt insulated fish hold rigid frames for adequate reinforcement, proper shrift of butt and use of good quality glue for water tightness. The canoe's light displacement (empty weight) was 95kg, which was similar to local canoe of same size. When placed on water a draft of 18cm was achieved which is 40.9% of its depth (44cm). The capacity of the canoe was 270kg, a fish hold capacity 41, 400cm3 which is absent from the type presently used, and the total production cost of N22,000.00 which was not beyond the reach of an average fisher folk of the Kainji basin. The modifications on the canoe resulted in provision of fish preservation facility, increased strength and improved water tightness, hence reduction in fish spoilage on fishing ground, increased life span of canoe and safety of fisher folk while aboard fishing.
    Description: Includes:- 6 tables.;2 figs.;10 plates;14 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Design ; Construction ; Boats ; Canoe fisheries ; Canoes ; Fishing vessels
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    Investigation of the socioeconomic activities and potentials of rural fisher folks in Oyan Lake Area (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23051 | 19325 | 2018-03-06 15:29:28 | 23051 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: An investigation of the socio-economic potential of the inhabitants living around Oyan lake (40km2 surface area) was carried out between January 2001 and August 2002. Five hundred (500) copies of the questionnaires were distributed among the people living around the entire stretch of the lake and 283 people responded. The commercial fish landing estimates showed that the total landing for the entire period of study was 4,628 (number) weighing 1,856.6kg. Mean catch per boat per sampling day (number and weight) was estimated to be 113 and 4.28kg respectively. Therefore the estimated annual fish landing (number and weight) per boat from 317 fishing days were 35,821 and 1,356.7kg respectively. The potential annual fish yield from commercial fishery for the lake was 147.5 tonnes while the total number of active boats recorded for the entire lake was 43,241.
    Description: Includes:- 1 table.;11 refs.
    Keywords: Fisheries ; Management ; Sociology ; Nigeria ; Oyan L. ; freshwater environment ; Socioeconomic aspects ; Financial management ; Investments ; Marketing
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    Factors affecting changing livelihood strategies of artisanal fisherfolks in inland fishing communities in Delta State (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23053 | 19325 | 2018-03-06 15:32:07 | 23053 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: This study examined the factors affecting changing livelihood strategies of artisanal fisherfolks in inland fishing communities in Delta State, Nigeria. The sample size of 169 respondents was selected through a simple random sampling from a total of 935 fisherfolks in two selected Local Government Areas. Instrument for data collection was structured questionnaire. Data were analysed using descriptive and non parametric statistic. The result showed that majority (44%) of the respondents is between the ages of 41 and 60 years. There were no significant relationships between marital status, educational level, family size, income of fisherfolks and changing livelihood strategies (r= - 0.118, P = 0.05; r = -0.102, P = 0.05; r= -0.107, p 0.05; r = -0.107, P = 0.05) respectively. Correlation co-efficient analysis revealed that there was insignificant relationship between reasons for diversification of livelihood and changing livelihood strategies of the artisanal fisherfolks (r = 0.103, P = 0.184). In conclusion, the factors affecting livelihood strategies of artisanal fisherfolks include coping with insufficiency, income, obnoxious fishing method, government policy, resource depletion through sand bank, respondents ethnicity, age and sex. It is therefore recommended that greater emphasis should be directed towards provision of credit facilities. Fishing nets should also be subsidised by the government.
    Description: Includes:- 4 tables.;12 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Delta State ; Livelihood ; Occupation ; freshwater environment ; Artisanal fishing
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    An appraisal of the participation of Egun women in fisheries in Otoawori of Ojo Local Government Area in Lagos State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23065 | 19325 | 2018-03-10 14:33:35 | 23065 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The study was carried out to identify the roles of Egun Women in Fisheries in Oto-Awori of Ojo Local Government Area of Lagos State, as well as factors affecting their roles. Data were collected using the purposive sampling to select 20 Egun Women involved in Fisheries in each of Araromi, Idumosan, lIepete, Idomila and Ebute areas in Oto-Awori, using questionnaire method. Data were analysed using the percentages and Chi-square tests. The results revealed that 80% of the Egun Women were engaged in Fish Smoking, Fish Icing (65%), and Fish Marketting (85%). Factors limiting effective participation of the Egun Women in Fisheries were discussed with a number of recommended strategies which can make Egun Women contribute to increasing fish supplies in the area.
    Description: Includes:- 3 tables.;7 refs.
    Keywords: Fisheries ; Nigeria ; Lagos State ; Women in Fisheries ; freshwater environment ; Fisheries ; Women
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    Characteristics of designed gill nets of various mesh sizes (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23050 | 19325 | 2018-03-06 15:27:37 | 23050 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The results of the investigation of characteristics of designed gill nets of various mesh sizes used in Kainji Lake are presented. Six different mesh sizes were used in the construction of the gill nets. 1O.8mm mesh size had a mean catch of 389.3kg, (66.69%) followed by 88.9mm mesh size with a mean catch of 144.1 kg (29.23 % of the total catch.) 101.6mm mesh size had a mean catch of 11.47kg (2.41%) while 152.4mm mesh size had a mean catch of 07.73kg (1.62% of the total catch). The lowest catches were recorded in gill nets of mesh sizes 177.8mm which had a mean catch of 0.2kg and 190.5mm which had a mean catch of 0.06kg and percentages of 0.04% and 0.01% respectively. It was observed that gillnets with 88.9mm mesh size had the highest mean weight of 19.64kg, followed by gill nets with 50.8mm mesh size which had a mean weight of 27.44kg. Gillnets with 152.4mm mesh size caught fishes with a mean weight of 12.31kg while 101.6mm mesh size had a mean weight of fish of 3.26kg. Gillnets with 177.8mm mesh size caught fishes with a mean weight of 0.68kg while gill nets with 190.5mm mesh size caught fish with the group mean weight of 0.61kg. Although the gill net with 50.8mm mesh size had the highest mean catch, the gill net with 88.9mm mesh size had the preferable mean weight combined with the mean catch, which had significant difference (P 〈 0.05) in its favour when compared with the other (five) designed gill nets. Tilapia was the most abundant fish species throughout the period of sampling. Recommendations for the conservation of the fisheries resources of the lake were also proffered.
    Description: Includes:- 4 tables.;2 figs.;11 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Gillnets ; Netting materials ; Design ; Catch statistics
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    Effect of spice treatment on the quality of hot-smoked catfish (Clarias gariepinus) (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23056 | 19325 | 2018-03-05 20:47:04 | 23056 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: An experiment was conducted to determine the efficacy of pepper and garlic spice mixture at 0%, 2%, 3%, 4% and 5% levels (per gram of fish) in retarding lipid oxidation and on the organoleptic quality of hot-smoked catfish (Clarias gariepinus) in Kainji Area. The fish samples were frozen, cut, eviscerated, cleaned and dipped in 14.5% brine for 10 minutes. They were treated with the spices, smoked at 80-86~'C for 6 hours, cooled, stored at room temperature (25~'C-31~'C) for 21 days and used for physical, chemical, microbial and sensory evaluation studies. Untreated samples served as control. From the results of analysis, samples treated with the mixture of pepper and garlic paste (1:1 ratio) were microbially more stable than the control samples as these had longer shelf-life and were not visibly covered by moulds during a 21-day storage period. The preservative activity of brine and the anti-oxidant activity of pepper and garlic mixture were evident from lower Thiobarbituric acid (TBA) and peroxide values of treated samples relative to untreated samples. Results of sensory evaluation showed a general preference for spice-treated samples.
    Description: Includes:- 7 taables.;15 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Fishery products ; Processing fishery products ; Cured products
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    Metal composition of Clarias gariepinus consumed in Makurdi and its environs (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23058 | 19325 | 2018-03-06 15:37:11 | 23058 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A study was conducted to determine the concentrations of nine heavy Metals (Cadmium, lead.Copper, Chromium, Iron, Zinc, Selenium, Nickel and Aluminum) in gills, muscles and skin of Clarias gariepinus within three different locations (Kuatansule, Wadata and UAM fish) with the use of standard flame Atomic Absorption Spectrophotometry Techniques. Iron was found in high concentration in all the sites with the gills having the highest concentration while lead. Cadmium, Selenium, Nickel and Aluminum were not detectable. Significant differences in metal concentrations were observed between locations with UAM fish farm having the highest metal concentration. It is concluded that concentration, of heavy metals found in selected organs of Clarias gariepinus were within tolerable limits as recommended by FAO.
    Description: Includes:- 1 fig.;13 refs.
    Keywords: Fisheries ; Health ; Clarias gariepinus ; Nigeria ; Makurdi ; freshwater environment ; Metals ; Heavy metals ; Fish ; Toxicity ; Health and safety
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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
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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
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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
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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
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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
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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
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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
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    Fisheries of Oyan Lake, south west Nigeria and potential for ecotourism development (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23002 | 19325 | 2018-03-05 09:28:21 | 23002 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The suitability of Oyan Lake (South West Nigeria) as a tourist centre was investigated between January 2001 and August 2002. The natural resources around the lake area were highlighted and their potentiality for ecotourism were noted. The trend of tourists to the lake for the past years was highlighted. The highest number of tourists was observed during the year 1995 while the lowest number was recorded in 2003. A total of 293 Industrial Attachment students from the University of Agriculture, Abeokuta, within a ten-year period have visited the lake while an additional 811 students visited the lake on field trips only between 1994 and 2006. A total of four different nationalities were recorded as visitors. 87.5 percent of these were citizens of Nigeria while 12.5 percent were international tourists. Infrastructural development needed to be put in place to enhance the visit of tourists to this lake have been recommended. Conservation of flora, fauna and cultural resources were suggested so as to enhance foreign exchange earnings. The relationship between climatic, faunal, floral, biodiversity, human and political environment for effective and productive tourism and national development were highlighted.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Fisheries ; Nigeria ; Oyan L. ; freshwater environment ; Fishery resources ; Tourism ; Natural resources ; Stock assessment ; Fauna ; Nature conservation ; Aquatic plants
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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
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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
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    Economic analysis of smoked fish marketing in some selected local government areas of Adamawa State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23061 | 19325 | 2018-03-06 15:42:07 | 23061 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: This study entailed an economic analysis of smoked fish marketing in Adamawa State. Primary data were collected with the aid of well structured questionnaires from marketers in 10 major fish markets in local government areas of Adamawa State. Findings from the study revealed that 72% of the fish sellers were females, middle aged and (75%) were married. The results also indicated that 43% of the people involved in fish marketing had no formal education, 22% had primary six education and below while only 4% had post secondary education. Eighty-seven per cent of the fish sellers are engaged in full time smoking and marketing as their major occupation. The commonest fish in the surveyed markets include catfish, tilapia, snake head and mackerel. Personal savings formed the main capital invested on the business. The study revealed that smoked fish marketing in the study area is highly profitable with an average gross margin of N25,467 per marketer and a return to variable cost of N2.85. The constraints to fish marketing are, highlighted in the paper. It is recommended that soft loan be given to fish marketers to engage fish production through sustainable aquaculture
    Description: Includes:- 1 table.;10 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Adamawa State ; freshwater environment ; Fishery economics ; Marketing
    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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    Format: 378 -381
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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
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    Format: application/pdf
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    Format: 233 - 239
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    Promoting women participation in sustainable development through fish production and marketing in the Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23063 | 19325 | 2018-03-06 15:43:22 | 23063 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Women constitute the major stakeholders in the struggle for sustainable rural development in subSaharan Africa. The major fishing activities of women are in the area of processing, marketing and gear making. Women's fundamental contribution is continually under-appreciated and under-supported and is often adversely affected by prevailing economic policies and other developmental conditions.These circumstances must be reversed since sustainable development through fish production and marketing can not be achieved without the full participation of women. This paper is focused on how women can be empowered for sustainabledevelopment in fish development and marketing.
    Description: Includes:- 2 refs
    Keywords: Fisheries ; Nigeria ; Women in fisheries ; freshwater environment ; Women ; Fisheries
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 394 - 395
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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
    Format: application/pdf
    Format: application/pdf
    Format: 395 - 402
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    Role of women in inland fishing communities in Nigeria: a review (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23066 | 19325 | 2018-03-10 14:34:46 | 23066 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The role of women in inland fishing communities in Nigeria have not been assessed or fully appreciated in the fishing industry in Nigeria. The role of women in the fisheries sub-sector is significant mainly in the post harvest activities such as sorting, preservation, processing, distribution and marketing of the fish products. The review highlights the fact that women not only make meaningful contribution to the socio-economic well-being of their households and the fishing but are also involved in other livelihood activities useful to their households and the community in which where they live. However, there are some constraints limiting women's involvement in fisheries and these range from socio-cultural, psychological to economic factors. It was therefore recommended that extension programmes on development issues should focus extensively on the post-harvest and livelihood activities in which women in inland fishing communities are mostly involved.
    Description: Includes:- 12 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Women in Fisheries ; freshwater environment ; Women ; Fisheries
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 406 - 408
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    A survey of ectoparasites associated with 3 species of fish Auchenoglanis occidentalis, Oreochromis niloticus and Bagrus bayad in River Benue, Makurdi, Benue State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23213 | 19325 | 2018-03-17 12:40:39 | 23213 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: A survey of ectoparasites of three species of fish (Oreochromis niloticus, Auchenoglanis occidentalis and Bagrus bayad) of River Benue was carried out for a period of three weeks. Samples were collected directly from fishermen, at the river side (River Benue) in a plastic bucket and were carried to the laboratory. A smear samples from the skin were taken. Fins were cuted and gills were dissected and examine individually in saline solution in a Petri dish and platyhelminthes parasites as the most common ectoparasites of threes three species (Oreochromis, Auchenoglanis, and Bagrus). A total number of five hundred and seventy two (572) parasites were observed. Result of this study reveals that the large number of parasites were found on the gills (65%) of the three fish species studied, compared to skin (16%) and fins (19%) of the total parasites observed; among the three fish species studied. O. niloticus carries 33% while A. occidentalis carries 41% and B. bayad carries 26% of the total parasites seen. There was negligible difference in the level of infestation in the sexes (i.e. male and female) of Oreochronis and Bagrus. However, a great significance difference in the level of infestation was found in the sexes of Auchenoglanis
    Description: Includes:- 3 tables.;8 refs.
    Keywords: Ecology ; Fisheries ; Auchenoglanis occidentalis ; Oreochromis niloticus ; Bagrus bayad ; Nigeria ; Benue R. ; freshwater environment ; Ectoparasites ; Parasites ; Infestation
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    The Nigerian fisheries and the attainment of the millennium goals: keynote address (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23212 | 19325 | 2018-03-28 15:46:00 | 23212 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The keynote address concentrated on the roles Nigerian fisheries could play in the attainment of the Millennium development goals. The concept of the eight Millennium Development Goals (MDGs) was defined as ranging from halving the extreme poverty to halving the spread of HIV/AIDS and providing universal primary education for all by the year 2015. The paper discussed the subject matter under the followng topics. Fisheries and the eradicaton of extreme poverty and hunger. Fisheries and the promotion of gender equality and women empowerment. Fisheries and reduction in child mortality and improvement in maternal health. Fisheries and the combat of HIV/AIDS, maleria and vother diseases. In conclusion, the paper called for public-private partnership to achieve the mellennium development goals.
    Keywords: Fisheries ; Auchenoglanis occidentalis ; Oreochromis niloticus ; Bagrus bayad ; Nigeria ; freshwater environment ; Production management ; Women ; Potential yield ; Production management ; Women ; Potential yield ; Public health ; Policies
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    Format: 5 - 9
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