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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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  • 20
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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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    The impact of meteorological parameters on fish weight loss in the Kainji Solar Tent Dryer (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23285 | 19325 | 2018-03-28 16:10:49 | 23285 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Metrological parameters and their impacts on weight loss of fish inside Kainji Solar Tent Dryer were experimentally investigated. Drying experiments were conducted in solar dryer across the five agro ecological zones of Nigeria. During the drying experiments, the parameters such as temperature, relative humidity were lowest. The study showed that meteorological parameters were the primary determinants for fish drying within the Kainji Solar Tent Dryer, since weight loss during the experiment followed the pattern of these parameters
    Description: Includes:- 2 tables.;2 figs.;5 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Processing fishery products ; Drying ; Solar power
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    Population dynamics of periwinkle Tympanotonus fuscatus var fuscatus (Linnaeus, 1758) in the Bonny Estuary, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23289 | 19325 | 2018-03-30 14:45:43 | 23289 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The growth, mortality and recruitment pattern of Tympanotonus fuscatus var fuscatus were investigated using shell length (SL) - frequency data obtained from the mangrove swamps of the Bonny River, population. Computer based software package FiSAT (FAO - ICLARM Fish Stock Assessment tool) were used for the analysis. Sampling was done between January to December, 2004. Results obtained showed relatively high growth, low mortality and recruitment pattern with two peaks annually.
    Description: Includes:- 2 tables.;1 fig.;11 refs.
    Keywords: Ecology ; Fisheries ; Tympanotonus fuscatus var fuscatus ; Nigeria ; Bonny Estuary ; freshwater environment ; Population dynamics ; Growth rate ; Mortality ; Recruitment
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  • 23
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    Sediment quality of lower reaches of Okpoka Creek, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23283 | 19325 | 2018-03-28 16:00:48 | 23283 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The sediment is the ultimate sink of contaminants in the aquatic systems. The physico-chemical quality of sediments lower reaches of Okpoka Creek was assessed for two years (wet and dry lsons).Sediment samples were collected at low and high tides from three stations according to standard methods. These were analysed for sediment particle size (sand, silt and clay), pH, total hydrocarbon (THC), total organic matter (TOM), total organic carbon (TOC) and conductivity. Analysis of variance (ANOVA), Duncan multiple range (DMR) and Pearson correlation cofficient were used to analyse the data. The sediment consisted of sand (57.86 ~c2.65%); silt 17.47~c1.68%) and clay (24.67~c1.33%). Sediment particle size showed significant spatial variation (p〈 0.05).The sediment values pH (5.22~c0.27) and THC (0.24 ~c0.05g/g) were low unlike TOM (2.42~c0.26%), TOC (1.43~c0.17%) and conductivity (5077.61~c 847.88s/cm).The TOM and TOC values exceeded FEPA and USEPA acceptable levels in sediments. The presence high levels of TOM and TOC indicate organic pollution in the lower reaches of Okpoka Creek. Therefore, environmental surveillance of these parts of the creek is advocated.
    Description: Includes:- 2 tables.;1 fig.;12 refs.
    Keywords: Earth Sciences ; Pollution ; Nigeria ; Okpoka Creek ; freshwater environment ; Sediment analysis ; Sediments ; Sediment chemistry ; Sediment load ; Pollution
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    The length-weight relationship and condition factor of Citharinus citharus citharus in Lake Kainji, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23314 | 19325 | 2018-03-30 15:25:47 | 23314 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The length - weight relationship and condition factor of Citharinus citharus citharus was studied for a period of twelve (12) months from Lake Kainji, Nigeria. Nine hundred and eighty nine (989) fish samples (Citharinus citharus citharus) with total length ranging from 100mm to 530mm and weight ranging from 31.00g to 2250.00g were analysed. The results showed that the values of a, b and r were 0.0039, 3.2134 and 0.8997 respectively. The condition factor(K) values varied from 2.9 to 4.5, which means that the growth pattern of the fish is based on the value of 'a'. the fish species are also living well in the Lake as the 'K' are greater than one.
    Description: Includes:- 2 tables.;9 refs.
    Keywords: Ecology ; Fisheries ; Citharinus citharus citharus ; Nigeria ; kainji L. ; freshwater environment ; Condition factor ; Length-weight relationships
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  • 25
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    Food and feeding habit of Tympanotonus fuscatus var fuscatus (Linnaeus, 1758) in the mangrove swamps of the Bonny River, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23324 | 19325 | 2018-04-06 16:00:32 | 23324 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Studies on the food and feeding habit of T. fuscatus var fuscatus from the mangrove swamps of the Bonny River, Niger Delta revealed that the species is a deposit feeder but fed more on algae and protozoa. The variation of food types with season were determined from the numerical and frequency of occurrence methods of food analysis. The algae were of Stephanodiscus, Cosanodiscus. Navicula and Nitzschia species, while the protozoa were Arecella arenaria, Pseudodileptus and Trinema species. Feeding actively occurred at low tides, this coincided with the presence of algae on the mud surface. No qualitative seasonal variation occurred as T. fuscatus var fuscatus fed basically on the primary diets at all seasons.
    Description: Includes:-1 table.;1 fig.;9 refs.
    Keywords: Ecology ; Fisheries ; Tympanotonus fuscatus var fuscatus ; Nigeria ; Niger Delta ; freshwater environment ; Feeding behaviour ; Stomach content ; Food consumption ; Stomach ; Seasonal variations
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    Lysine requirement of Oreochromis niloticus (2021)
    Fisheries Society of Nigeria | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23370 | 19325 | 2018-04-10 16:05:46 | 23370 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Oreochromis niloticus was reared in 54 litre glass tanks being fed with 35% crude protein diets for 56 days. A basal diet consisting intact protein from groundnut cake and guinea com (4.56g lysine/100g protein) ,four graded levels of crystalline lysine was added to formulate diets consisting 6.87, 7.30, 7.41, 7.51 g lysine /100g protein and a reference diet of intact protein from groundnut cake, guinea com and fish meal having 5.37g lysine/100g protein was fed to six treatments in triplicate groups. The growth parameters shows there was no significant difference in the mean weight gain, specific growth rate, food conversion efficiency and protein efficiency ratio of fish fed varying levels of lysine. A maxima was obtained from the quadratic equation of food efficiency ratio against graded levels of lysine at 7.3g/100g protein which is the requirement. Carcass ash was higher with the initial fish while crude protein was highest with the the fish fed 7.3g lysine/l00g protein
    Description: Includes:- 6 tables.;22 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; New Bussa ; Fish culture ; Nutritional requirements ; Nutrition ; Feeding experiments ; Lysine
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  • 27
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    Management and utilization of water hyacinth (Eichhornia crassipes) for improved aquatic resources (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23439 | 19325 | 2018-05-02 08:19:22 | 23439 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Natural aquatic plants population can be healthy for any aquatic ecosystems as they serve as fish feed, play an important role in nutrient cycling, purify the water, control unwanted algal growth and support fauna including birds. Water hyacinths (Eichhornia crassipes) have proven to be a persistent and expensive aquatic weed problem. The review was carried out in the face of current global challenge (climate change) which threatens biodiversity conservation and sustainable use of natural resources so that water hyacinth could be viewed as an asset of multifarious benefits considering the revealed highlights rather than been labeled expensive nuisance. The simplest method of management of aquatic weeds is to harvest it and utilize it for cost effectiveness in production such preparation of fish and livestock feeds, bio-gas production, making of charcoal briquetting and waste water treatment for domestic and industrial use. The main problem of utilization and management of water hyacinth is its high cost of transportation to sites for utilization but, once this can be overcome as revealed in the review appropriate utilization techniques is recommended.
    Description: Includes:- 4 tables.;34 refs.
    Keywords: Aquaculture ; Biology ; Conservation ; Eichhornia crassipes ; Nigeria ; freshwater environment ; Plant utilization ; Aquatic plants
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    Mercury content of some canned seafood collected from Nigerian retail markets (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23444 | 19325 | 2018-05-02 08:30:46 | 23444 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Twenty samples of canned seafood consisting of tuna, mackerel, sardines, prawn and shrimp were collected from retail operations in Victoria Island, Lagos, Nigeria. Mercury content in these canned seafood were determined after digestion by the Association of Official Analytical Chemists methods. The mercury contents for all the canned seafood products have concentrations well below the permissible EU levels for this toxic metal. Their contribution to the body burden can therefore be considered negligible and the canned seafood products seem to be safe for human consumption.
    Description: Includes:-1 table.;13 refs.
    Keywords: Fisheries ; Pollution ; Nigeria ; freshwater environment ; Mercury ; Heavy metals ; Pollution ; Chemical pollution
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    Impact of oil exploration on fisherfolks' livelihood and safety of fisheries industry in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23443 | 19325 | 2018-05-02 08:29:36 | 23443 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: There have been many outcries in the Nigerian media on the various environmental degradation of the vast water space in the Niger Delta area of Nigeria by oil explorers. About 70% of the Nigerian populace lives in the coastal areas where the occupation is predominantly fishing and farming. For most of the publications, the extents of impact on the fishing industry are not addressed in order for solutions to be given. Production from the fisheries sector has dropped astronomically thereby earning the country a deficit due to importation of frozen fish to the country. In this study, a survey of three states (Bayelsa, Rivers and Delta) in the Niger Delta area of Nigeria was done. The communities studied include Ogulagha, Okobelema and Okpoama. Personal interviews with fishermen and primary data on the sector’s contribution to fish production and GDP were also carried out. The study aimed at finding out the sources and nature of degradation and the impacts such have on the fishing industry and the socio-economics of the fishermen. The study revealed that there are no significant difference in the negative impacts of environmental degradation caused by the activities of the oil companies on the socio-economics of the fishermen ((F2,27=0.59, P〉0.05)) The difference is not significant and the hypothesis is therefore accepted. The major impact on fishing was depletion in catches and low income earnings by fishermen with a resultant poor quality of living and livelihood. Oil spills, foreign vessels incursions and bunkering, vandalization of pipelines were identified sources of depletion in fish catches from the wild. The personal interviews and Focus Group Discussion (FGDs) showed that most heads of communities rely on the remuneration they get from the companies and refused to mobilize the fishermen for joint action against the oil companies. Mitigation measures usually carried out by the oil companies do not actually replenish the destroyed mangroves where breeding of fishes take place. The communities need the Government to institute high level surveillance of the high seas and monitor the activities of oil explorers as well as education of the communities on the effects of bunkering near shoreline.
    Description: Includes:- 1 table
    Keywords: Fisheries ; Pollution ; Sociology ; Nigeria ; Delta State ; Nigeria ; Bayelsa State ; Nigeria Rivers State ; brackishwater environment ; Degradation ; Pollution effects ; Oil spills ; Oil pollution
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    Bioaccumulation of heavy metals in freshwater Clarias anguillaris and Parachanna africana from Lake Geriyo in Yola, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23447 | 19325 | 2018-05-02 08:36:01 | 23447 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study was carried out to determine the bioaccumulation of heavy metals in Clarias anguillaris and Parachanna africana from Lake Geriyo Yola, Nigeria using energy dispersive X-ray fluorescence (EDXRF) spectrophotometer. The results in (mg/kg, dry weight) showed different levels of Cr, Cu, Mn, Fe, Ni, Zn, and Pb in the two fish species. The order of heavy metals accumulated by C. anguillaris and P. africana are Cr〉Fe〉Zn 〉 Mn〉Cu〉Ni〉Pb and Ni〉Fe〉Zn〉Cu respectively. The levels of Cr, Mn and Ni in C. anguillaris and in Ni in P. africana were higher than WHO and FEPA recommended maximum permissible limits (MPL) in fish, while the levels of Zn, Cu and Pb were below the standards. The results suggest that Lake Geriyo has high pollution loads of these heavy metals in fishes and could pose a health hazards to man. Consequently, close monitoring of heavy metal loads in Lake Geriyo is recommended with a view to minimizing the risks to health of the population that depend on the lake for their water and fish supply.
    Description: Includes:- 1 table.;13 refs.
    Keywords: Fisheries ; Pollution ; Clarias anguillaris ; Nigeria ; Geriyo L. ; freshwater environment ; Bioaccumulation ; Pollution effects ; Heavy metals ; Hazard assessment
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    Toxicity of drilling fluid XP-07 on microbial load and survival of Oreochromis niloticus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23441 | 19325 | 2018-05-02 08:26:44 | 23441 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Static bioassays were carried out in the laboratory for 96h to investigate the effect of Parateq a synthetic base mud on the fingerling of Orechromis niloticus and their microbial population. The fingerlings were exposed to different concentrations (0, 1000, 3000, 5000 and 9000Mg/l) of drilling fluid. Fish mortality data were recorded at 24, 48, 72 and 96h and analysed using Finney’s Probit Analysis method to calculate LC50 values (concentration of drilling fluid in water that will kill 50% of the fish population in 96 hours). The 96h LC50 was 2210Mg/l.The mortality increased with increase in concentration, while, the lethal times decreased as concentration increased. The bacterial biomass ranged from 1.59 x 108 to 6.0 x 106CFU/ml while fungal biomass ranged from1.0 x 103 to 2.1 x 104 CFU/ml. Results revealed that there was an increase in fungal biomass with increase in mud concentration and a decrease in bacterial biomass with increase in mud concentration.
    Description: Includes:- 2 tables.;1 fig.;20 refs.
    Keywords: Biology ; Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Aluu Rivers State ; freshwater environment ; Toxicity ; Microbiological analysis ; Microbial contamination ; Pollution effects ; Chemical pollutants
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    Comparative analysis of physicochemical characteristics of ABU and Zaria Dam (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23440 | 19325 | 2018-05-02 08:25:12 | 23440 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physical and chemical parameters of ABU Dam and Zaria Dam were carried out between September and October 2009. The results obtained in the two water bodies were temperature 27.7 0C, pH (7.5 and 7.3), dissolved oxygen (5.8 mg/l and 5.0 mg/l), biochemical oxygen demand (1.74 mg/l and 2. 16 mg/l), alkalinity (58 mg CaC03/l and 49 mgCaCO3/l) P04-P (2.47 mg/l and 1.59 mg/l) NO3-N (3.67 mg/l and 3.47 mg/l), conductivity (54.70 ~ks-1 and 42.48 ~ks-1), total hydrocarbon (TH) (47.66 mg/l) and 48.00 mg/l) and total dissolved solids (32.68 mg/l and 25.35 mg/l) respectively. There was no significant difference in the mean values of the parameters (P〉0.05) except conductivity and total dissolved solids. The water bodies were found to be neutral with high conductivity. All the properties in the water bodies were in conformity with international standards both for drinking and aquatic life.
    Description: Includes:- 2 tables.;7 refs.
    Keywords: Chemistry ; Limnology ; Pollution ; Nigeria ; Zaria Dam ; Nigeria ; ABU Dam ; freshwater environment ; Physicochemical properties ; Pollution
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    Toxicity of herbicide Propanil on Oreochromis niloticus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23438 | 19325 | 2018-05-02 08:16:59 | 23438 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A static bioassay method to determine the acute toxicity of the herbicide propanil to Oreochromis niloticus was investigated under Laboratory conditions for 96 hours exposure period. Concentrations of propanil used include: 0.0096ml/l, 0.0103ml/l, 0.011ml/l and 0.012ml/l respectively. The lethal concentration (LC50) value of propanil on fingerlings of Oreochromis niloticus was 0.0097ml/l for 96 hours of exposure. The regression equation for probit kill from propanil was found to be Y = 29.84 + 12.33* log conc. (r2 0.9951, Y = Probit kill). Fish showed various abnormal behaviours upon exposure to propanil. Immediate reaction was erratic swimming and tendency to jump out of the test bowl. Others include: restlessness, un-coordinated movement, vertical swimming, air gulping, equilibrium loss, a period of quiescence and eventually death.
    Description: Includes:- 2 tables.;1 fig.;21 refs.
    Keywords: Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Markudi ; freshwater environment ; Toxicity ; Lethal effects ; Toxicants ; Pollution effects ; Fingerlings ; Herbicides
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    Relationship among Tilapia guineensis fingerlings abundance and water quality variations in a brackish water reservoir in Lagos (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23442 | 19325 | 2018-05-02 08:28:15 | 23442 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In recent times there has been an upsurge in the culture of Tilapia in Nigeria resulting in increased demand for the fingerlings which is hardly satisfied. This is due to increasing demand for table size tilapia as food fish and under-sized tilapia in the fish meal and fish canning industries in Nigeria. Collection of Tilapia guineensis fingerlings from the wild, to augment hatchery production, has been the practice and this is subject to environmental fluctuations. Multivariate regression and correlation analyses of accumulated data were used to investigate the effects of changes in water quality parameters on abundance of fingerlings of Tilapia guineensis in a brackishwater habitat in Lagos. Dissolved oxygen (DO), salinity and secchi transparency were found to be the most dominant factors affecting the abundance of Tilapia guineensis fingerlings in the Lagos lagoon. Peak period of abundance was closely associated with period of low salinity (0.50%o to 5.60%o), which coincided with the period of low transparency and low DO in the rainy season. The correlation analyses of Tilapia guineensis fingerlings with the water quality parameters yielded the following correlation coefficients (r)- 0.598; (salinity); -0.644 (transparency); -0.710 (DO); -0.566; (temperature) and 0.129 (pH). The abundance of Tilapia guineensis fingerlings in the Lagoon was ultimately defined by a suitable regression equation. This result is expected to optimize the collection of fingerlings of Tilapia guineensis from the wild and boost food fish security in Nigeria and elsewhere.
    Description: Includes:- 1 table.;1 fig.;( refs.
    Keywords: Chemistry ; Fisheries ; Tilapia guineensis ; Nigeria ; Port Harcourt ; brackishwater environment ; Water quality ; Fingerlings ; Chemical properties ; Physicochemical properties
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  • 35
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    Tissue distribution of heavy metals in fin fish from a tidal fish farm in South East Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23450 | 19325 | 2018-05-04 17:32:24 | 23450 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The concentration of heavy metals: Lead (Pb), Cadmium (Cd), Iron (Fe) and Zinc (Zn) in tissues of fin fish from a tidal fish farm in Calabar, South East Nigeria, was determined. The mean levels of heavy metals (~kgg-1) in gills, muscle tissues, liver and intestines of catfish were Pb: 2.39~c1.24; Cd: 0.87~c0.83; Fe: 3.96~c1.55; Zn: 8.15~c3.18. Mean levels in Tilapia were Pb: 0.035~c0.002; Cd: 0.61~c0.05; Fe: 1.09~c0.61; Zn: 2.17~c0.53. There was no significant difference (p〈0.05) in tissue concentrations of Pb and Cd whereas a significant difference (p〈0.05) was observed between Pb and Zn concentrations for both species of fish. Concentrations were also higher in liver, gills and muscle tissues than the intestines. Highest concentrations were observed in the liver and gills in both species. Generally, higher concentrations were observed in liver, gills and muscles of Catfish than in Tilapia. Concentrations of Pb and Fe in Catfish were significantly higher (p〈0.05) than the WHO limits, while Zn and Cd were lower. Tissue concentrations of all the metals in Tilapia were however, within the WHO recommended limits. The concentrations in all the fish tissues were significantly higher (p〈0.05) than in the surrounding water. The observed values in Catfish indicate environmental threat to the health of the fish and indeed the humans that consume them and therefore calls for environmental surveillance in the area
    Description: Includes:- 3 tables.;1 fig.;7 refs.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Calabar ; freshwater environment ; Heavy metals ; Tissues ; Pollution ; Pollution effects
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  • 36
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    Spatial and temporal variations of physicochemical variables in a small 'pristine' stream in Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23445 | 19325 | 2018-05-02 08:32:33 | 23445 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Spatial and temporal variations of physico-chemical variables of Onu-Iyi ?Ukwu stream were studied for 12 months from March 2005 to February 2006. Three sampling stations were established along the main stream channel from source to mouth. Spatial variation in physico-chemical parameters indicated that total alkalinity, total hardness, conductivity, and nitrate-nitrogen (NO3) recorded their highest values at the upper reaches (with values 14.0mg/l, 88.09mg/l, 17.00~kscmiscm, and 0.60mg/l respectively). Dissolved Oxygen (DO) and pH had their maximum values of 8.20mg/l and 6.94 at the middle reaches. Turbidity, biochemical oxygen demand (BOD), temperature and phosphate-phosphorus (PO4) increased steadily from source to mouth. The observed seasonal variation indicated that wet season values were higher for all the parameters except temperature, turbidity, phosphate-phosphorus (PO4) and total alkalinity although the values were not statistically significant at p〉0.05. The correlation coefficient (r) showed no significant relationships p〈0.05 between physico-chemical parameters except DO and BOD with correlation values of (0.75 and -0.54) respectively.
    Description: includes:- 2 tables.;1 fig.;17 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Onu-Iyi-Uku Stream ; freshwater environment ; Physicochemical properties ; Phosphates ; Phosphorus ; Turbidity
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  • 37
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    Effects of locust bean (Parkia bigtobosa) effluent on the histology of Clarias gariepinus juveniles (Burchell 1822) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23448 | 19325 | 2018-05-02 08:37:49 | 23448 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The poor nature of most Agricultural processing practices in Nigeria have had adverse effect on our environment, and our aquatic resources are of no exception. This study was conducted to ascertain the median lethal concentration of the effluent within the 96 hours period and also to ascertain the extent of damage on some of the histological characteristics of the Clarias gariepinus juveniles. Juveniles of the Clarias gariepinus (mean weight 30g) were exposed to varied concentrations of the locust bean effluent under the standard laboratory conditions. Data on mortality corresponding to the various concentrations were subjected to the probit and logit transformations and used to calculate the LC50 graphically. The result shows the toxicity of the locust bean effluent to Clarias gariepinus juveniles as 0.089mg/L (treatment 4) during the period of study. Exposure to both the acute and subletheal concentrations resulted in a number of physiological dysfunction of the test fish. Observation of the fish under the tests revealed unbalanced swimming patterns loss of reflex, rapid opercular movements and gasping for air. Histopathological examination of the gill and liver of the treated fish showed signs of damage, ranging from Hypoxia, lesions, necrosis, fibrosis cell stasis and hyperplasia at the sublethal levels.
    Description: Includes:- 2 tables.;1 fig.;22 refs.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Parkia bigtobosa ; freshwater environment ; Toxicity ; Lethal effects ; Pollution ; Histology
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    A brief examination of the food and biometric features of the grey mullet, Mugil cephalus (Linnaeus) from low brackish / fresh water lagoon (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23452 | 19325 | 2018-05-04 17:37:43 | 23452 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A total number of 166 specimens of Mugil cephalus caught from Epe Lagoon (low brackish/ freshwater) were examined for food and feeding habit and biometric features from November 2006 ? May 2007. The food of the species consisted mainly of algae (Bacillariophyta, Cyanophyta, Chlorophyta and Pyrrophyta) and detritus. The size range of fish examined were 12.4 ? 27.0cm (standard length) while the weight ranged from 22.40 ? 308.00g. The mean values of the biometric characters of Mugil cephalus did not reflect wide variations. The population dominant cohort in the lagoon represents the harvestable and marketable representative for a sustainable fishery and is a strong indication of potential for freshwater culture of this marine species.
    Description: Includes:- 2 tables.;1 fig.;23 refs.
    Keywords: Ecology ; Fisheries ; Mugil cephalus ; Nigeria ; Epe Lagoon ; freshwater environment ; marine environment ; Feeding behaviour ; Food preferences ; Biometrics
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  • 39
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    Limnological studies of Bosso dam and it's tributaries in Minna, Niger State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23449 | 19325 | 2018-05-02 08:39:20 | 23449 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physico-chemical parameters of Bosso Dam were analyzed weekly for a period of six (6) weeks from 29th October, 2009. In all, six (6) stations were identified within the dam. The physico-chemical parameters assessed were: temperature, dissolved oxygen, pH, alkalinity, hardness, conductivity and transparency. The results obtained from the analysis revealed slight variations in most parameters. There was no significant difference p〉0.05 in pH regardless of stations and weeks. But significant difference p〉0.05 were observed in dissolved oxygen, nitrate, temperature, conductivity, hardness, alkalinity, biological oxygen demand, transparency, in respect regard to stations. These variations could be due to influx of organic waste from surface run offs and inorganic waste deposited by man. The physico-chemical parameters observed, indicated that most of them fall with the recommended range or standard by the Federal Ministry of Environment
    Description: Includes:- 2 tables.;10 figs.;18 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Bosso dam ; freshwater environment ; Physicochemical properties ; Chemical properties ; Physical properties ; Water properties
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  • 40
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    Fish diversity in two reservoirs in Southwest Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23458 | 19325 | 2018-05-04 17:48:45 | 23458 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study investigated the fish diversity of Eko ? Ende and Owalla reservoirs, which are within the Osun river system in South West, Nigeria with a view to document biodiversity information needed for conservation and sustainable fisheries. Fish samples were collected monthly from the two reservoirs for one year, using a battery of multifilament gill nets. The data collected from each reservoir was analyzed for fish diversity. Information obtained on the forage / carnivore (F/C) ratio of fishes in each reservoir was used in measuring and comparing the ecological balance of the reservoirs. The results showed that eighteen fish species representing 16 genera and 10 families were identified in Eko ? Ende, while 17 fish species in 15 genera and 10 families were identified in Owalla during the period of study. Sixteen species (representing 84.2% of the total number of fish species) were common to both reservoirs and they were both dominated by Cichlids. Eko ? Ende Reservoir had greater fish diversity than the Owalla Reservoir. Shannon ? Weiner (H') index of fish diversity from Eko ? Ende reservoir was 2.37 while that from Owalla reservoir was 2.10. The forage / carnivore (F/C) ratios of the fishes from the two reservoirs showed that Eko ? Ende reservoir (F/C = 1.98) is ecologically balanced, while Owalla reservoir (F/C = 0.92) is not Owalla reservoir had a higher population of Hemichromis fasciatus (a predatory species). This reservoir also had more intensive fishing activities than the smaller Eko ? Ende reservoir. The study concludes on the need for a participatory research to alleviate the problem of ecological imbalance of fish species in Owalla reservoir.
    Description: Includes:- 4 tables.;28 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Eko-Ende Reservoir ; Nigeria ; Owalla Reservoir ; freshwater environment ; Biodiversity ; Species diversity ; Check lists
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  • 41
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    Evaluation of nutritional composition of waterlily (Nymphaea lotus Linn) from Tatabu-Flood Plain, north central Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23501 | 19325 | 2018-05-07 12:24:04 | 23501 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The proximate composition of leaves, petiole, root, rhizome and seeds of waterlily harvested from Tatabu flood plain/wetlands were determined and analyzed in percentages. Moisture content was highest in the rhizome (20.40 ~C 1.241) while the seeds gave the lowest value of (4.18 ~c 0.176). The highest value for Ash content was observed in the root (27.36 ~C 1.261) and the seeds gave the lowest (2.81 ~c 0.498). Highest value for the Crude fat was obtained from the seeds (9.95 ~c 0.637) whiles the petiole gave the lowest value of (2.27 ~c 0.377). The Crude protein and Crude fibre values were highest in the leaves (19.5 4~c 0.782) and; (15.53 ~c 0.448) while the lowest was obtained in the seeds (3.27 ~c 0.104), (1.60 ~c 0.200) respectively. There was a significant differences among the parts analyzed for the Ash content (p〈0.05). The NFE varied from (31.21 ~c 2.176) to (78.15 ~c 1.418)
    Description: Includes:- 1 table.;19 refs.
    Keywords: Biology ; Ecology ; Nymphaea lotus ; Nigeria ; Tatabu Floodplain ; Proximate composition ; freshwater environment ; Aquatic plants ; Chemical composition ; Chemical properties ; Moisture ; Lipids ; Nutritive value
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  • 42
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    Fatty acid composition of catfish (Clarias gariepinus) viscera oil (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23502 | 19325 | 2018-05-07 12:25:41 | 23502 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The fatty acid composition of oil extracted from the viscera of African catfish, Clarias gariepinus caught from a fish farm in New Bussa was investigated with a view to prove their usefulness. A total of 20 fatty acids were obtained out of which five were identified. Lauric, Palmitic and Stearic acids were the main saturated and monounsaturated fatty acids respectively. The principal acids in the polyunsaturated group were Oleic and Linoleic acids. C. gariepinus viscera is constituted of polyunsaturated fatty acids which make it a valuable pharmaceutical raw material rather than waste.
    Description: Includes:- 1 table.;10 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; New Bussa ; freshwater environment ; Fatty acids ; Polyunsaturated fatty acids ; Chemical properties
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  • 43
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    Proximate analysis of snakehead fish, Parachanna obscura (Gunther 1861) of the Cross River, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23509 | 19325 | 2018-05-08 15:33:45 | 23509 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: African snakehead, Parachanna obscura is being considered as an emerging aquaculture candidate in Nigeria. The species is very palatable and has a good fillet quality. Study was conducted on the proximate composition of the species from Cross River, Nigeria. Samples of snakehead were analyzed for protein, fat, moisture, crude fibre and ash contents. The protein content of the species ranged from 21.03-22.03 with mean value of 21.5%. The fat content ranged from 17.1-17.4% with a mean value of 17.2 %. Moisture content ranged from 51.1-52.0 % with a mean value of 51.7%. Ash and crude fibre contents were very low. The protein content of Parachanna obscura compares favourably with that of other members of the family Channidae. The fat content is exceptionally high, making the species a good healing and recuperating agent for post-natal and post-operation patients. We strongly recommend the culture of Parachanna obscura in Nigeria and its meal for growing children.
    Description: Includes:- 2 tables.;16 refs.
    Keywords: Fisheries ; Parachanna obscura ; Nigeria ; Calabar ; Proximate composition ; freshwater environment ; Proteins ; Body conditions ; Moisture ; Ash content
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  • 44
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    Lipid profile and blood by-products of deformed and healthy African mud catfish (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23507 | 19325 | 2018-05-08 15:28:31 | 23507 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Study was conducted to investigate lipid profile and metabolites in deformed (lost one or both pectoral fins) and healthy (both pectoral fins intact) African mud catfish C. gariepinus using three groups of adults male and female with a mean weight and standard length of 822.17~c 48.75g and 42.55~c.26cm respectively. The fish were allotted in replicates to 5000m capacity tanks based on the presence or absence of pectoral fins. 1mL blood was drawn from caudal peduncle of each fish by means of disposable sterile syringe and centrifuged at 1000rpm for 20min at 40C. Cholesterol and total protein were determined using the cholesterol FL (CT F400CH) and total protein (TP 0500CH) kits. Serum albumin and globulin concentrations were determined following methods described by Tietz (1995) and Buckley et al., (1976) while total serum bilirubin concentration was measured as outlined by AACC (American Association of Clinical Chemistry). Results indicate that male fish had relatively higher amount of triglyceride while female fish had higher amounts of cholesterol, reduction in globulin of the deformed fish, reduction in the concentrations of albumin in healthy fish, increase in total protein and globulin levels and high urea concentrations. No total bilurubin was detected in any of the fish sampled thus an indication of good liver function which means there was no liver dysfunction or liver damage in the fishes. It is evident therefore that abnormal fish can still perform better if they are given intense management because of the variability in their blood constituents with the normal fishes which is used to assess their health is minimal. Keywords: Blood, Cholesterol, Deformed, Healthy, C. gariepinus.
    Description: Includes:- 2 tables.;30 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Badagry ; freshwater environment ; Lipids ; Blood ; Cholesterol ; Metabolites
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  • 45
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    African Regional Aquaculture Centre Library: information resources and services (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23513 | 19325 | 2018-05-08 15:39:43 | 23513 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Effective research development is no doubt information driven and ARAC library remains the place to easily access accurate and reliable information. There is an urgent need to acquire and maintain its information resources in order to provide globally acceptable information. The production of validated research literatures by ARAC staff goes to show that the library has made itself relevant to scientist in achieving their mandate to ARAC. This Paper examines the resources and services rendered by the African Regional Aquaculture Centre library in meeting the needs of research Scientist, students and stakeholders in Aquaculture practice in the Niger Delta Nigeria. It describes the establishment of TEEAL and OARE service within the library and examines the research interest of scientist and library users with emphasis on their research areas.
    Description: Includes:-2 tables.;2 figs.;10 refs.
    Keywords: Aquaculture ; Information Management ; Nigeria ; Port Harcourt ; freshwater environment ; Information services
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  • 46
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    The comparative effect of fish and blood meal based diets on the growth and survival of juvenile tilapia (Oreochromis niloticus) in concrete tank (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23508 | 19325 | 2018-05-08 15:31:05 | 23508 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An experiment was carried out to find out the comparative effect of imported fish meal, blood meal and local fish waste based diets on the growth and survival of juvenile tilapia. (O. niloticus) in concrete tank. Four diets consisting of N.I.O.M.R. pelleted feed containing 40% CP, with imported fish meal, as the control and three others formulated with fresh, boiled cattle blood and local fish waste meal at 30% CP, were fed to juvenile tilapia with average initial weight of 55.24g in four treatments and four replicates in a completely randomized design. Result indicated final body weights of 100.83, 96.54, 98.4 and 86.82g and average body length of 18.47, 18.16, 18.4 and 18.14cm, for treatments 1 (control), 2 (fresh blood based diet), 3 (boiled blood based diet) and 4 (local fish waste meal based diet) respectively, with no significant difference between the treatments (P〉0.05). The same was also true for average daily weight gain of 0.41, 0.36, 0.31 and 0.28g. However, treatment 1 and 2 had better relative weight gain 93.69 and 80.21%, than 3 and 4 at 62.37 and 64.85% respectively, (P〈0.05). The survival was 100% in all treatments. Treatment 2 was more cost effective at N539.06/Kg fish, followed by 1 with N667.52. Treatments 3 and 4 had the highest at N698.20 and N718.60 per kg fish. The trial showed that tilapia feed processed with fresh cattle blood performed as well as imported fish meal, boiled blood and local fish waste and in addition was more cost effective.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Port Harcourt ; Feed evaluation ; freshwater environment ; Feeding experiments ; Diets ; Nutritional requirements ; Survival ; Growth rate
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  • 47
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    Enforcement of inland fisheries regulations and law in Oyo State (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23514 | 19325 | 2018-05-08 15:41:07 | 23514 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study assesses the enforcement of Inland Fisheries Regulations and Laws in Oyo State. This was done with a view to ascertaining the existence of regulations and laws that govern the inland waters of the state; the agents that are responsible to carry out the enforcement and the problems militating against the effectiveness of enforcement in the state, in order to provide relevant information for policy formulation and management of fishery resources. Information was gathered from secondary sources which include edicts for the state, journals and mass media reports. Personal interview with government fisheries officials and fishermen was also conducted. The research findings revealed that Oyo State has only fishing by-laws. The study also reveals that fishermen's co-operatives were the enforcement agents in the state. There was no record of arrest during the period of the study. Problems such as non- availability of surveillance and arresting equipment, lack of trained law enforcement fisheries officers were identified. The paper elaborates on possible management strategies of inland waters as a prelude towards increased fish production in the State.
    Description: Includes:- 11 refs.
    Keywords: Fisheries ; Law ; Nigeria ; Oyo State ; freshwater environment ; Legislation ; Fishery industry legislation ; Fishery regulations
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  • 48
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    Micro-credit: financing fish production in Nigeria - a review (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23516 | 19325 | 2018-05-08 15:44:14 | 23516 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Microfinance refers to loans, savings, insurance, transfer services and other financial products targeted at low-income people. Artisanal fishing is a crucial source of livelihoods in developing nations, particularly for low-income families in rural areas where job options are limited. Nigeria depends heavily on revenues from natural resources, especially oil hence income from fishing is particularly important to Nigeria. Aquaculture is also being practiced with a growth rate that has increased over the years. Sources of funding for the operators of these sectors of the economy who are mostly poor peasants will ensure sustainable production and income generation. Informal microfinance groups have existed before the advent of formal microfinance. Microfinance institutions in Nigeria operate in an environment that is dominated by commercial banks. However, their high deposit rate makes them attractive to the low income group. This paper examines the emergence of microfinance institutions, their contributions to fisheries and aquaculture and constraints to be overcome to enable them serve the fisheries and aquaculture sector better.
    Description: Includes:- 1 fig.;14 refs.
    Keywords: Fisheries ; Management ; Nigeria ; freshwater environment ; Financial institutions ; Financial resources ; Financing ; Fisheries ; Fishery economics ; Fishery management
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  • 49
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    Fish trading: a tool for socioeconomic enhancement and poverty alleviation (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23519 | 19325 | 2018-05-08 15:49:39 | 23519 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A study was conducted in Abeokuta, the Ogun State capital with the objective to investigate if fish trading could be a tool of poverty alleviation and socio-economic enhancement of the status of women in the household. A total of 120 correctly completed, structured and pre-tested questionnaires, out of the 150 administered to respondents, were retrieved for data analyses. Demographic data of the traders showed that all the respondents were women whose ages ranged from 15 to above 45 years. The ages of 33-45 years constituted 33.3% of the respondents while the age bracket of between 27-32 years constituted 23.3%. Majority (73.3%) were married while 25% were single-headed households (divorced or widowed). The study revealed that most of the respondents (approximately 61%) were able to meet their family expenditure jointly with their spouses while 28.3% of the respondents met the financial responsibilities of their families solely from the profit. Access to credit was found to be a major limitation. The study further revealed that 86.7% of the respondents would like to continue with the business because they were satisfied with the profit accruable to them from the trade.
    Description: Includes:- 3 tables.;19 refs.
    Keywords: Management ; Fisheries ; Nigeria ; Abeokuta ; Poverty alleviation ; freshwater environment ; Marketing ; Market research ; Women ; Fisheries
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    Policy and policy framework for growth of women's fisheries activities: accessing micro credit facilities for women in fisheries development as a fundamental human right (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23517 | 19325 | 2018-05-08 15:46:10 | 23517 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This paper begins with a review of policy issues on status of women’s fundamental human rights and the effects on their optimal participation in fisheries development. The focus of the paper is on the importance of women in fisheries activities within the fisheries industry. Issues pertaining to gender inequality in the rural communities affecting women in the fisheries sector, and solutions to overcome some of these issues are discussed. The degree of participation of women in the fisheries sector is an overall reflection of the cultures, the laws of the country and the priority given by the state to ensure gender equity. Generally, women in Nigeria, especially those from depressed fisheries households, participate actively in many fisheries activities, including aquaculture. However, the lower status accorded to women in many of the communities in Nigeria means that their contribution to fisheries is undervalued and unrecognized. Issues that need to be addressed with regards to participation of women in fisheries which include sensitivity to gender issues in fishery, improve living conditions, promote programs relating to women, reconsidering the practice of relating fishing rights to their right to speak and others are discussed in the paper The paper also looks at the possibilities of articulating measures in sensitizing the womenfolks through education, especially in knowing their fundamental human rights as specified by the UN’s articles, especially ability to access micro-credit in fisheries activities, the nature of loans and alternative strategies to tackle the problem of small-scale credit to women in fisheries development in the nation.
    Description: Includes:- 2 tables.;2 figs.;12 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Ibeju Lekki ; freshwater environment ; Women ; Fishery policy ; Financial institutions ; Financial resources ; Financing
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    Factors related with adoption of fish farming technologies in selected communities in Niger State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (NIgeria)
    In:  http://aquaticcommons.org/id/eprint/23478 | 19325 | 2018-05-05 13:04:01 | 23478 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study investigates the factors, which inhibit or facilitate adoption of fish farming technologies by individual fish farmers in Niger State. There was significant relationship between six of the ten variables investigated and these have contributed significantly (p〈0.05) towards predicting the adoption scores of the fish farmers. It is believed that proper assessment of these factors by researchers could be used by policy makers and executioners to improve adoption of fish farming innovations. Significant factors include farmers’ age, education, pond size, access to credit, sources of information and income level. Recommendations were made involving change agents and policy markers for future fisheries and aquaculture development in Nigeria. Keywords: Study, Factors, Adoption, Technologies, Fish farming, Communities, Nigeria
    Description: Includes:-5 tables.;8 figs
    Keywords: Aquaculture ; Information Management ; Nigeria ; Niger State ; Fisheries Extension Services ; freshwater environment ; Technology transfer ; Fish culture
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    Women's participation in lower Ikpa River fisheries of Akwa Ibom State, Nigeria: a case study of Ifiayong (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23523 | 19325 | 2018-05-09 12:27:39 | 23523 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Ifiayong is a small local village market where economically and commercially important fin and shellfishes are landed. It is located very close to the Five Star and Ibom Le Meridian Hotels at Nwaniba beach. Women functioned as transporters, sorters, processors, financiers, distributors and marketers of the thirty-two finfish families, seven shellfish species together with three turtles (reptiles) encountered at the study site. Socio-economic survey revealed that ninety-four women modally aged 46-55years (34; 36.17%) participated in the fisheries and frequently communicated in Efik (40; 42.55%), and were mostly drop-outs (40; 40.56%) in educational level and polygamous (35; 38.30%). The modal family size was 11-15 persons (45; 47.87%) who invested N 41,000 - N 50,000 (28; 29.79%). Problems encountered by these women together with the corresponding solutions and appropriate recommendations proffered were highlighted with the aim of making Ifiayong a revenue generating and tourism centre for Uruan Local Council and Akwa Ibom State Government.
    Description: Includes:- 1 table.;1 fig.;28 refs.
    Keywords: Management ; Fisheries ; Nigeria ; Ikpa R. ; freshwater environment ; Marketing ; Financing ; Women
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    International visibility and accessibility of articles in the Proceedings of Fisheries Society of Nigeria through the Aquatic Commons repository (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23526 | 19325 | 2018-05-09 12:44:34 | 23526 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The major problem of published information in the developing countries particularly in Africa is lack of international visibility and accessibility to world community of scientists. This has implications on both the articles and their authors. It means they are read by their immediate community. However, despite the advantages of the information technology, the problem is still very much with us today. It has been observed that publications from the developing countries are not captured by international alerting services like the ASFA, CAB, AGRIS however, it must be acknowledged that ASFA has intensified efforts at covering grey literature from developing countries. Efforts of information scientists today is focused on the creation of open archives to beef up the process of information availability and accessibility to all. This paper therefore highlighted the steps taken by NIFFR, FISON, IAMSLIC and FAO Fisheries Branch Library to popularize articles in the proceedings of the Fisheries Society of Nigeria. The paper explained the concept of Aquatic Commons Repository as an open archive repository drawing out its inherent advantages. The steps taken to involve the participation of Nigerian Institutions have been highlighted. The outcome of the participation showed improved visibility and accessibility of articles in FISON proceedings which have been uploaded in the Aquatic commons Repository. The ten most downloaded papers from FISON 18th proceedings were downloaded 4,210 times of which Enzenwa and Anyanwu’s paper were downloaded 1210 times from over twelve countries. Out of the 1210 downloads, 500 downloads were from Nigeria country of origin of the publication. This showed that more people became aware and have access to FISON publication through the Aquatic Commons repository.
    Description: Includes:-1 tables.;4 figs.;5 refs.
    Keywords: Information Management ; Nigeria ; Aquatic Commons ; freshwater environment ; Information services ; Information centres
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    Management implications of sex ratios of three palaemonid shrimp in the Cross River Estuary, south eastern Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23529 | 19325 | 2018-05-09 12:51:48 | 23529 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Information on sex composition of fish/shellfish species is important in determining reproductive potentials and estimating size structure of a given stock. Sustainable fisheries management options and policies usually rely on this aspect of the reproductive biology. In the present study, the sex ratios of three palaemonid shrimps, Macrobrachium macrobrachion, Macrobrachium vollenhovenii and Macrobrachium equidens were studied over an annual cycle with respect to gear type. Male: female relationship for M. macrobrachion caught with beach seine, pushnet and trap were 1:2.2, 1:2.1 and 1:2.15 respectively, while the M:F ratios for M. vollenhovenii were 1:1.27 (beach seine), 1:1.32 (pushnet) and 1:1.64 (trap). The overall M:F ratios during the annual cycle were 1:2.15 (M. macrobrachion), 1:1.47 (M. vollenhovenii), and 1:1.74 (M. equidens). The monthly sex ratios indicated that there were more females than males during the period, except for M. equidens which had a ratio of 1:0.78 in the month of August. This is advantageous for the stock dynamics of the species, especially if the males could mate with more than one female during any reproductive season.
    Description: Includes:- 1 table.;11 refs.
    Keywords: Biology ; Fisheries ; Macrobrachium equidens ; Macrobrachium macrobrachion ; Macrobrachium vollenhovenii ; Nigeria ; Cross River Estuary ; brackishwater environment ; freshwater environment ; Sex ratio ; Shrimp fisheries ; Reproductive cycle ; Population structure
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    Climate change: implications for fisheries and coastal aquaculture (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23531 | 19325 | 2018-05-09 13:01:07 | 23531 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: A keynote address at the 25th annual conference of the Fisheries Society of Nigeria. The paper presented evidence of climate change in the past and discussed the issue of global warming in the past, present and future. The Greenhouse effects are some of the topics discussed. Discussed in greater detail is the Nigerian situation in the global warming and climate change. The potential impacts on aquaculture has been enumerated. The paper is concluded by given suggestionswhich mitigate the impact of climate change and called on the Federal Ministry of Environment to strengthen research and other arms of government to create a strong synergy to work towards ameliorating the impact of climate change in the country.
    Description: Keynote address at the 25th Annual Conference of the Fisheries Society of Nigeria. Includes:- 2 tables.;6 figs.;6 plates;12 refs.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Climatic changes ; Fisheries ; Aquaculture
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    Culture trial of (Peneaus) Penaeus monodon in concrete tank (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23527 | 19325 | 2018-05-09 12:48:12 | 23527 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Culture trial of the Tiger Shrimp (Peneaus monodon) was carried out in one of the grow-out concrete tanks at Nigerian Institute for Oceanography and Marine Research, Victoria Island, Lagos. A total of 264 post larvae of P. monodon (PL 30) produced at the Institute’s shrimp hatchery complex were used for the experiment which lasted for 157 days. Coppens Catco feed of 0.8 - 1.2mm size was used to feed the post larvae throughout the duration of the experiment. The results showed that the shrimps grew from an initial mean body weight of 1.763g at stocking to 19.538g at the end of the experiment. The daily growth rate was 0.113g/day while specific growth rate was 1.532 %. Food Conversion Ratio (FCR) was 3.362 while survival rate was 90%. The study has shown that P. monodon can be successfully cultured in concrete tanks. However further studies aimed at improving growth rate will be undertaken.
    Description: Includes:-2 tables.;5 plates.;15 refs.
    Keywords: Aquaculture ; Peneaus monodon ; Nigeria ; Lagos ; freshwater environment ; Shrimp culture ; Crustacean culture ; Aquaculture
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    Effect of smoking duration on the microbiological quality of cold-smoked Atlantic cod, Gadus morhua (Linnaeus, 1758) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23491 | 19325 | 2018-05-06 13:02:08 | 23491 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: This study evaluated the effect of varying smoking durations of 6, 6.5, 7 and 7.5 hours on the microbiological quality and percentage moisture content of cold-smoked Atlantic Cod, Gadus morhua. The fish sample were cold-smoked using the traditional drum oven. Four batches of the smoked fish were stored in metal baskets at ambient temperatures for a period of 12 days and assessed for Staphylococcus aureus and Escherichia coli loads, Mould count, Total Plate Count and Total Coliform Count. Analyses of the smoked fish samples were carried out at the initial stage (day 0) and subsequently every alternate days (i.e. days 2, 4, 6, 8, 10 and 12). Significant variations (P 〈 0.05) were obtained for all the microbial counts on the four smoked fish samples. The best microbiologically stable cold-smoked samples were that smoked at the longest duration of 7.5 hours. This produced the least mean microbial load range of TPC (1.50 x 103 - 2.00 x 105cfu/g); TCC varied from 0.0MPN/g to 12.0 MPN/g ; Mould count (1.32 x103 - 2.55 x 105 cfu/g) and Staphylococcus aureus (3.0 x103 - 1.35 x 105cfu/g) while percentage moisture content ranged between 25.3% to 15.2%. All the samples tested negative to Escherichia coli.
    Description: Includes:- 2 tables.;15 refs.
    Keywords: Fisheries ; Gadus morhua ; Nigeria ; Ogun State ; marine environment ; Microbial contamination ; Curing ; Processing fishery products
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    Growth, survival rate and condition factor of Heteroclarias hatchlings fed cultured Moina micrura, shell free Artemia and combination of both as starter feed (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23503 | 19325 | 2018-05-07 12:27:24 | 23503 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Growth (Percentage weight gain, Specific growth rate , total body length), survival rate and condition factor of Heteroclarias fry fed shell free Artemia, cultured Moina micrura and mixture of both as starter feed were investigated. 30 individual fry were placed in a 4-litre plastic bowl in three treatments of 3 replicates for 25 days in Fish Hatchery. Individual water quality parameters (water pH, temperature, Dissolved oxygen, total Alkalinity and carbon dioxide) monitored for each treatment were not significantly different (p〉0.05) from each Heteroclarias fry fed live M. micrura had the highest percentage weight gain (496.03%), Specific growth rate (3.09), percentage survival rate (88.83%) and condition factor (39.75) but these results were not significant different (P〉0.05) from those of shell free Artemia except those of condition factor. Shell free Artemia and Live M. micrura combination was observed to have the lowest fry Percentage weight gain (428.30%),. specific growth rate(2.54), % survival rate (85.50), condition factor(24.39) and total body length(1.52cm). The highest total body length was observed in shell free Artemia although not significantly different (p〉0.05) from others. The implication of using cultured live M. micrura instead of shell free Artemia as starter diet for Heteroclarias hatchlings at the critical stage of development are discussed
    Description: Includes:- 6 figs.;16 refs.
    Keywords: Aquaculture ; Heteroclarias ; Moina micrura ; Nigeria ; Keffi ; freshwater environment ; Growth rate ; Survival ; Condition factor ; Feeding experiments ; Fish culture
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    Haematological profile of blood of African catfish (Clarias gariepinus, Burchell 1822) fed sunflower and sesame meal based diets (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23506 | 19325 | 2018-05-07 12:32:20 | 23506 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The effect of substituting soybean meal with raw sunflower and sesame seed meal was evaluated using haematological indices of Clarias gariepinus fed the diets containing sunflower and sesame seed meal. Seven isonitrogeneous and isocaloric diets containing sunflower and sesame seed meal replacing soybean meal at a rate of 15, 30 and 45% were prepared. A diet without replacement of soybean meal served as control. The result of fish fed test diets showed significant (P〈0.05) difference over the fish fed control diet with respect to PCV and mean corpuscular volume (MCV). Fish fed control diet had the lowest Hb, PCV, WBC, RBC, MCV, MCHC, ESr. There was no significant difference (P〉0.05) in the fish fed control diet and test diets with respect to MCH, MCHC, ESr, Neutrophil, Monocytes, Eusinophils and Lymphocytes. Hence it can be concluded that the haemotological parameter of Clarias gariepinus is not significantly (P〉0.05) changed with increase dietary inclusion of raw sunflower and sesame seed meal.
    Description: Includes:- 4 tables.;22 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Feeding experiments ; Fish culture ; Diets ; Nutritional requirements ; Haematology
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    Growth response of Clarias gariepinus (Burchell 1822) juveniles fed diets containing raw Mucuna utilis seed meal (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23505 | 19325 | 2018-05-07 12:31:00 | 23505 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Feeding trial was conducted in static water to assess the growth of Clarias gariepinus fingerlings fed different inclusion levels of Mucuna seed meal (MSM). Raw MSM was used at 10%, 20% and 30% inclusion levels and the performance of fish fed these diets was compared with the fish fed soybean-based diet which contained 40%protein. All diets were prepared to be isonitrogenous and isocaloric. A four by six factorial experiment with three replicates using ten fish each of average initial weight of 6.6g was carried out. Daily fish ration of five percent body weight was administered two times for twelve weeks. The specific growth rate (SGR) in diet 1 (control) was significantly (p〈0.05) higher than the other dietary groups and worsens as inclusion level increased similar trend was also observed in the food conversion ratio (FCR) and protein efficiency ratio (PER). The significantly lower growth performance of fish fed diets containing raw MSM might be due to the presence of anti-nutritional factors present raw MSM. The possibility of improving this trend through processing should be investigated.
    Description: Includes:- 3 tables.;14 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Osogbo ; freshwater environment ; Feeding experiments ; Fish culture ; Diets ; Growth rate
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    Growth of Clarias gariepinus juveniles fed five commercial feed (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23504 | 19325 | 2018-05-07 12:29:55 | 23504 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Clarias gariepinus juveniles 6.35 ~C 0.22 g weight were fed five different commercial diets for 105 days to determine growth rates. Diets were hand distributed in triplicate groups of 30 fish once daily. The diets used were Coppens, Multifeed, Eurogold, Vittal and Ajanla feeds. At the end of the experiment, the final mean weight for Coppens, Multifeed and Eurogold were 181.54 ~c 0.63 g, 179.92 ~c 0.95 g and 139.92 ~c 0.26 g respectively, while final mean weight for Vital and Ajanla were 110.11 ~c 0.23 g and 119.03 ~c 0.35 g respectively. The statistical analysis of the results showed that there were significant differences (P〈0.05) in the mean final weights. Also there was no significant difference (P〉0.05) in the mean final weight between Coppens and Multifeed. The specific growth rates (SGR) were 3.19% day-1 3.18 % day-1 and 2.94% day-1 for Coppens Multifeed and Eurogold respectively and 2.71% day-1 and 2.78% day-1 respectively for Ajanla and Vital. There were significant differences (P〈0.05) in SGR among treatments and no significant difference (P〉0.05) between SGR of Coppens and Multifeed. Based on these findings, it was concluded that feed with macronutrient combinations of 45% CP, 12% crude fat, crude fiber, 1.5%, Ash 9.5% promoted better growth rates in C. gariepinus juveniles as compared with other combinations.
    Description: Includes:- 2 tables.;21 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeriaa ; Port harcourt ; Feed trial ; Feed evaluation ; freshwater environment ; Feeding experiments ; Fish culture ; Feed efficiency ; Feed
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    Effects of replacement of fishmeal with palm grub (Oryctes rhinoceros Linnaeus, 1758) meal on the growth of Clarias gariepinus (Burchell, 1822) and Heterobranchus longifilis (Valenciennes, 1840) fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23510 | 19325 | 2018-05-05 13:09:20 | 23510 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Clarias gariepinus (0.73 ~c 0.01g) and Heterobranchus longifilis fingerlings (0.67 ~c 0.01g) were fed five isonitrogenous diets of about 40% crude protein, with varying levels (0-100%) of palm grub meal for 12 weeks. At the end of the study, C. gariepinus and H. longifilis fingerlings fed 25% palm grub inclusion diet had the highest weight gain (5.30g and 4.05g respectively), relative (726.0% and 595.6%) and specific (1.09% and 1.00%) growth rates while those fed 100% palm grub inclusion diet showed least growth; weight gain (2.68g and 2.15g), relative (367.1% and 316.2%) and specific (0.80% and 0.45%) growth rates respectively. Food conversion and protein efficiency were also best in fingerlings fed 25% palm grub meal diet (0.70 and 1.35 for C. gariepinus; 0.75 and 1.35 for H. longifilis respectively) with decreasing efficiency as palm grub inclusion level increased in the diets. The differences in the growth and nutrient utilization of the fingerlings on the various diets were generally insignificant (p〉0.05) above 25% inclusion level of palm grub. The study showed that palm grub can be used to completely replace fish meal in mudcatfish diets. However, for optimal growth and nutrient utilization, 25% level of replacement of fish meal with palm grub meal is most adequate in C. gariepinus and H. longifilis fingerlings diets.
    Description: Includes:- 7 tables.;2 figs.;12 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Heterobranchus longifilis ; Oryctes rhinoceros ; Nigeria ; Ibadan ; freshwater environment ; Feeding experiments ; Growth rate ; Fish culture ; Diets
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    Lysine requirement and its effect on the body composition of Oreochromis niloticus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23512 | 19325 | 2018-05-08 15:38:22 | 23512 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The study was carried out to investigate the lysine requirement and its effect on the body composition of Oreochromis niloticus fingerlings. Two hundred and seventy fingerling O. niloticus (9.01 -11.09g) were reared in 35L plastic troughs. Six diets were formulated, containing 35% crude protein. The diets were formulated with ingredients deficient of lysine (Groundnut cake -3.23g lysine/100g diet and guinea corn -1.9g lysine/100g diet) for O. niloticus having whole body content of 7.51g lysine/100g protein. The diets consist of a basal diet (Diet I, no added lysine), while the test diets (II, III, IV and V) had 4.56g, 6.87g, 7.30g, 7.41g lysine/100g protein respectively. The reference diet was made of Clupeids (mixture of Pellonula afzeliusi and Physalia pellucida), groundnut cake and guinea corn but no added lysine (5.37g lysine/100g protein). The fish were fed twice daily (0900 and 18.00hrs) at 3% body weight for 56 days. There was significant difference in the mean weight gain and food conversion efficiency (P〈0.05). The four levels of lysine resulted in quadratic responses (P〈0.05). Calculation using regression equations from the relationship between the specific growth rate, weight gain and lysine levels show that lysine requirement for fingerling was 7.12g/100g protein respectively. The requirement of O. niloticus for lysine is 7.12g lysine/100g protein.
    Description: Includes:-6 tables;18 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; New Bussa ; freshwater environment ; Lysine ; Feeding experiments ; Diets ; Feed composition
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    Proximate composition of some commercial fish feeds sold in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23511 | 19325 | 2018-05-08 15:37:02 | 23511 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A study was undertaken to analyse and compare with manufacturers’ declaration the nutrient content of some feeds available in Nigeria through proximate analysis. The commercial fish feeds collected from the markets were Adolf Calyx, Coppens, Dizengoff and Durante. Proximate composition such as moisture, crude protein, crude lipid, ash, fibre and NFE (nitrogen free extract) were analysed. In general, there was variation between analysed and company declared nutrient contents of different feeds especially the protein and lipid content of the feeds. Apart from Adolf Calyx, all the analysed feeds had protein contents of above 40% which is good for catfish production as recommended by the manufacturer. Keywords: Proximate composition, Commercial fishfeeds, Adolf Calyx, Coppens, Dizengoff, Durante.
    Description: Includes:- 2 tables.;15refs.
    Keywords: Aquaculture ; Nigeria ; Makurdi ; Proximate analysis ; Feed evaluation ; freshwater environment ; Moisture ; Ash content ; Proteins ; Lipids ; Diets ; Feed ; Feed efficiency
    Repository Name: AquaDocs
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    The opinion of fishermen and customers (fish buyers) on middlemen of Doro-Baga fish market, Borno State (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23518 | 19325 | 2018-05-08 15:48:25 | 23518 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study examined the opinion of fishermen and fish buyers on middlemen of Doro Baga fish market. 240 respondents were used as samples with the aid of structured questionnaire, using stratified random sampling technique. Descriptive statistics was used to analyze the data obtained. The study revealed that majority of the fishermen (75%) highly depend on these selling brokers to sell their fish for them because their financial support comes from the selling brokers, moreover they do not have a stand in the market. Among the fish buyers, especially those that buy directly for consumption, see the brokers as people that create confusion during transaction. But 55% of the fish buyers believed that brokers keep the business flowing through their support of the fishermen. While the major problem of the fishermen with the selling brokers is getting the loan from the brokers especially when the fisherman is new in the area or business and on the other side, brokers only give the fish buyers grace of two to three days when they don’t have money, after that the broker would sell the fish to another buyer. These problems can be solved when a strong relationship is established between the fishermen, selling brokers, and fish buyers, or when the government intervenes by giving loans to the fishermen.
    Description: Includes:- 3 figs.;3 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Doro ; Middlemen ; freshwater environment ; Fishermen ; Marketing ; Market research ; Pricing
    Repository Name: AquaDocs
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    Gender and fisheries of Lake Kainji, Nigeria: a review (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23515 | 19325 | 2018-05-08 15:42:14 | 23515 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper examined gender and fisheries of Lake Kainji, Nigeria. The study highlights socio economic characteristics of women involved in Kainji Lake fisheries, important issues about gender and fisheries. It reveals that the categories of women in the Kainji Lake fisheries are in the middle age of 31 to 40 years with very low educational background. It also indicates that fish processing has been the most prominent activity of women in fisheries of Lake Kainji and constitute about 60 percent of the women. The study concludes that women play significant roles in all aspects of fisheries in Lake Kainji. Importantly, women’s roles span reproduction and production.
    Description: Includes:- 1 table;! fig.;13 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Women ; Fisheries ; Processing fishery products
    Repository Name: AquaDocs
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    Length-weight relationship and condition factor of two Hydrocynus species in Lake Kainji, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23520 | 19325 | 2018-05-08 15:51:20 | 23520 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In the study and understanding of fish biology, characterization and morphology, the length-weight relationship is of great importance. The genus Hydrocynus, is of high economic importance to the fisheries of Lake Kainji. This study investigated their length-weight relationship to establish the growth pattern of species within this genus. The ‘b’ values of the length-weight relationship for these species are less than 3. There was negative allometric growth (b〈3) for all samples of the Hydrocynus species. The correlation coefficients (r) are 0.9713 and 0.9888, for Hydrocynus forskali and H.brevis respectively. Condition factors ranged from 1.313 for H. forskali to 1.431 for H. brevis.
    Description: Includes:- 2tables.;2 figs.;27 refs.
    Keywords: Ecology ; Fisheries ; Hydrocynus forskalii ; Hydrocynus brevis ; Nigeria ; Kainji L. ; freshwater environment ; Length-weight relationships ; Condition factor
    Repository Name: AquaDocs
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    Sources and uses of micro-credit in poverty alleviation among fish farmers in Osun State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23521 | 19325 | 2018-05-09 12:23:43 | 23521 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Aquaculture is one of the fastest growing food production systems in the world, Nigeria inclusive with the bulk of its output currently being produced within developing countries and with expectations for aquaculture sustainable food security and poverty alleviation. However, poverty which is a social condition characterised by the inadequacy of access to basic human needs for the maintenance and socially acceptable minimum standards of living is still prevalent. One of the major obstacles to achieving the objectives of poverty reduction through aquaculture is the inadequate credit facilities to boost production. The study therefore, this study investigates the sources and uses of micro-credit in poverty alleviation among fish farmers in Osun state, Nigeria. A two stage random technique was used to select 137 respondents from the three Osun State Agricultural Development Programme (ADPs) zones. Structured questionnaire was used to collect data on demographic characteristics, Micro-credit sources and use, occupational, income and fish production data. Data was analysed using descriptive statistics, FGT and logit model. The result shows that both formal and informal micro-credit sources were used in the area studied with high interest rate militating against the adequate use of some of the micro-credit sources. Poverty alleviation through micro-credit use will increase efficiency through the use of modern effective and efficient technology leading to greater production. The policies aimed at making micro-credit readily available should be focused on to alleviate poverty among fish farmers
    Description: Includes:- 4 tables.;1 fig.;12 refs.
    Keywords: Aquaculture ; Management ; Nigeria ; Osun State ; Microfinace ; freshwater environment ; Financial management ; Socioeconomic aspects ; Sociological aspects
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    Privatization: a policy to transform and increase the production capacity of fish in Nigeria fish industries (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23524 | 19325 | 2018-05-09 12:30:42 | 23524 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Over 200 hatcheries of fish exist in Nigeria with at least two hatcheries in each state of the federation but unfortunately over 50 percent are either non-functional or function far below their optimum production capacities. Also about 85 percent of the non-functional hatcheries belong to the government (-either federal, state, local government or institution). The associated problems with the non-functional hatcheries include: inadequate funding, poor maintenance of hatcheries facilities, high cost of feed inputs, in adequate infrastructure, differential growth and cannibalism in catfishes which result in poor fingerling harvest, low attitude and lack of commitment to government work. Privatization/ownership options are considered the best options for this paper and clues to solve the problems mentioned above through privatization are presented. Problems with privatization and private investment are also discussed. It was advised that in case the existing hatcheries are put in to full production, the national demand for fingerlings which is placed at 4.3 billion annually could be met with ease. Fingerlings production in the hatchery as the quickest revenue yielding aspect of fish farming (with high internal rate of returns and short pay back period) capable of attracting revenue within 2-3 mouths of a breeding exercise are emphasized.
    Description: Includes:- 10 refs.
    Keywords: Aquaculture ; Nigeria ; Privatization ; Hatchery ; freshwater environment ; Hatcheries ; Seed production ; Fish culture ; Fishery development ; Development projects
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    The rise of peri-urban aquaculture in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23533 | 19325 | 2018-05-10 09:40:52 | 23533 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper traced aquacultural development in Nigeria to the colonial period in 1950s with fish farming in tilapias during which more than 200 small scale subsistence level ponds were built with some growth continuing in the rural areas. There was a bloom in farming of catfishes in 2000. The interest shown by private fish farmers has been identified as a propelling factor for aquacultural development in Nigeria. The development of private fish hatcheries has been another factor leading to the growth of aquaculture. The paper noted that social capital and its development either directly or indirectly can be identified as contributing to the success of the sectors. The increasing profit from aquaculture has led to fish farmers increasing beyond 5000 tonnes in 2009. The paper highlighted the numerous advantages which led to the expansion of the industry in Nigerian villages.
    Description: FISON EKO 2010: Invited paper. Pagination on document pp. 1-15 Include:- 1 table.;16 figs.;14 refs.
    Keywords: Aquaculture ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Aquaculture ; Fish culture ; Aquaculture development
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    Format: 114-128
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    Developing shellfish industry in Nigeria: technology and economics (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23534 | 19325 | 2018-05-10 09:44:16 | 23534 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper asserted that shellfish resources are poorly developed and utilized in West Africa. This was proved by the fact that in 2008 total marine shellfish capture production in West Africa was only 29,815 tonnes. The advantages of Nigeria in beefing up its production are highlighted. Some of these advantages are on extensive coast line which has not been affected by industrial pollution. The tropical climate is also an advantage for growing of cultured shellfish. The paper highlighted that to maximize the potential of shellfish Mari-culture development requires education, training, seed production technology, grow-out technology, processing and marketing. These requirements are discussed in details in the paper.
    Description: FISON EKO 2010: Invited paper Includes:- 3 tables.;9 figs.;60 refs.
    Keywords: Biology ; Aquaculture ; ASE ; Nigeria ; Coast ; marine environment ; Shellfish ; Shellfish culture ; Shellfish fisheries
    Repository Name: AquaDocs
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    Challenges to meeting best procedure in quarantine services delivery (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23536 | 19325 | 2018-05-10 10:07:34 | 23536 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper defined quarantine as the totality of measures taken by every country to prevent the entry of foreign exotic pest, pathogens and diseases of plant, animals and aquatic resources through international boundries. Also discussed is the international regulatory framework on quality control and quarantine of agricultural products. The advantages and socioeconomics impact of quarantine are discussed. The paper further examined the best practice procedure in quarantine service delivery in the aquatic resources and products right from production, processing, marketing and condition for exporting of aquatic (Live fish) from Nigeria, In conclusion the paper enumerated the challenges in meeting best practice procedures in quarantine service delivery
    Description: Paper delivered at the Agricultural Quarantine Services (NAQS) Paramilitary Training for Officers and Men, Jaji, Kaduna, 15-29 ?, 2009 Presented at FISON EKO 2010: Other materials. Pagination on document pp. 1-18
    Keywords: Fisheries ; Health ; Nigeria ; Quarantine ; freshwater environment ; marine environment ; Quarantine regulations ; Legislation ; Safety regulations
    Repository Name: AquaDocs
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    Effects of ice storage on the biochemical composition of Macrobrachium vollenhovenii (Herklots, 1857) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23530 | 19325 | 2018-05-09 12:53:10 | 23530 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Changes in biochemical properties of freshwater prawn stored with two ice conditions Without Direct Contact with Ice (DCI) and Without Direct Contact with Ice (WCI) for day 0, 2, 4, 6, 8 and 10 were investigated. Proximate composition defined in terms of moisture increased for the DCI as storage days increases but relatively constant with treatments with WCI. Values of TVB-N (mgN/100g) in prawn stored with DCI had inverse relationship with storage days but increased with storage days in the WCI. Changes in the values of ash and crude protein were relatively constant as the storage days increased in both treatments. Ice treatments recorded little changes in between storage days for fats. Values of NPN mgN/100g decreased with days of storage with DCI but increased as the storage increased with WCI. These results obtained in this study showed that ice storage may have contrasting values and importance on the biochemical properties of the freshwater prawn.
    Description: Includes:- 2tables.;16 refs.
    Keywords: Fisheries ; Macrobrachium vollenhovenii ; Nigeria ; Badagry Lagoon ; freshwater environment ; Storage ; Storage effects ; Biochemical composition ; Storage life
    Repository Name: AquaDocs
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    Fisheries training in Nigeria's tertiary institutions - curriculum, staffing, equipment and other facilities: a critique of NUC’S minimum benchmark academic standards (MBAS) document (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23532 | 19325 | 2018-05-10 09:37:28 | 23532 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper is a review of the curriculum, staffing, equipment, field and laboratory requirements prescribed by the National Universities Commission (NUC) for training of Fisheries graduates. This is made as these are guidelines against which Fisheries programmes, now being proliferated in many Nigerian tertiary institutions, can be evaluated for possible accreditation. The critique shows that some courses are highly under-weighted e.g. “Aquatic Flora and fauna” as a 2 credit unit. There is a high degree of overlap between courses. Some are not clearly and sharply delineated, defined or described. Staff needs are not defined or described. Staff needs are not defined in terms of core course areas of specialization. Limnology & Oceanography have their descriptions restricted to physico ? chemical features and not viewed in the desired comparative perspective. Suggestions are made on a wider listing of equipment, field laboratory, and library need to sharpen the NUC guideline. A review committee is recommended.
    Description: FISON EKO 2010: Invited Paper. Pagination on document pp. 1-23 Includes:- 17 refs.
    Keywords: Education ; Fisheries ; Information Management ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Education ; Curricula ; Training ; Fisheries
    Repository Name: AquaDocs
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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
    Repository Name: AquaDocs
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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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    Food, feeding ecology and condition index of the brackish river prawn Macrobrachium macrobrachion (Herklots, 1851) (Crustacea, Decapoda, Palaemonidae) in the Cross River Estuary, South-Eastern Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22994 | 19325 | 2018-03-04 05:34:46 | 22994 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Investigations were carried out to study the food, feeding ecology and condition index of the brackish river prawn, 〈i〉Macrobrachium macrobrachion〈/i〉 (HERKLOTS, 1851). One thousand, nine hundred and ninety-seven live specimens which comprised of individuals representing all size groups of the prawn were studied. The specimens were obtained from the commercial artisanal catches at Nsidung Beach along Calabar River (40301N and 80201E). Although algae formed the bulk of the diet of the prawn with 44.61% occurrence, other food items: detritus (24.30%), crustacean remains (23.14%), mud/sand particles (6.23%), fish bones and scales (2.14%) and small worms (0.21 %), were also consumed. The sub-adult and adult prawns respectively exhibited similar condition index of 0.98, while the youngs showed a condition index of 0.82. The significance of the similarities in condition indices between the sub-adult prawns and the varied condition indices among the young, sub-adult and adult prawns in addition to the exhibition of an overlapping feeding ecology by the prawn is discussed.
    Description: Includes:- 2 tables.;2 figs.
    Keywords: Ecology ; Fisheries ; Macrobrachium macrobrachion ; Nigeria ; Calabar R. ; brackishwater environment ; Feeding behaviour ; Brackishwater ecology ; Diets ; Stomach content ; Shrimp fisheries
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    Fisheries and ecotourism: a tool for national development (2021)
    Fisheries Society of Nigeria | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23004 | 19325 | 2018-03-05 09:27:38 | 23004 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The paper which is a key note address, examined the concept of the United Nations Conference on Environment and Development (UNCED) held in Rio de Janeiro (Brazil), June 1992 as it relates to fisheries and land based tourism. The significance of fisheries to the world economy and the trends in global fisheries production are highlighted. The world production is put at 130.8 million tonnes, while production in Nigeria is put at 408.9 tonnes. The relationship between fisheries and ecotourism are discussed. Advantages in co-developiong fisheries and ecotourism are highligthed.
    Description: Includes:- 6 tables.;5 figs.;11 refs.
    Keywords: Conservation ; Fisheries ; Nigeria ; Ecotourism ; freshwater environment ; marine environment ; Fishery management ; Marine parks ; Sanctuaries ; Tourism ; Recreation ; Conservation ; Fishery development ; Nature conservation
    Repository Name: AquaDocs
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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
    Repository Name: AquaDocs
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    Aspects of reproductive biology of three West African prawns in the mangrove creeks of the Cross River Estuary, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22995 | 19325 | 2018-03-04 05:33:19 | 22995 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Some aspects of the reproductive biology of the three dominant species in the 〈i〉Macrobrachium〈/i〉, fishery of the Cross River Estuary namely 〈i〉M. macrobrachion, M. vollenhovenii and M. equidens〈/i〉, were studied. Due to the difficulties associated with identifing the onset of maturity of 〈i〉Macrobrachium〈/i〉 males, only the females were used in the study. The size massive maturation (TL〈sub〉m〈/sub〉 in mm) for 〈i〉M. macrobrachion〈/i〉 was 68.83 (CI: 66.63-71.10 mm) at corresponding age of 6.61 (CI: 6.28-6.96) months. TL〈sub〉m〈/sub〉 for 〈i〉M. vollenhovenii〈/i〉 was 106.74 (CI: 102.81. 110.81), at a corresponding age of 7.42 (CI: 7.01-7.82) months, while TL〈sub〉m〈/sub〉 for 〈i〉M. equidens〈/i〉 was 59.09 (CI: 57.50-60.72), at the age of 7.70 (CI: 7.39-8.03) months. Average fecundity for 〈i〉M macrobrachion, M. vollenhovenii and M. equidens〈/i〉 were 2490 (range 270-4710), 23,943 (range 1744-46,141), and 2359 (range 400-4318) eggs per female, respectively. The larger females had more eggs than the smaller ones. Understanding of the reproductive biology of these biological species is indispensable for efficient management of their resources.
    Description: Inludes:- 4 tables.;13 refs.
    Keywords: Biology ; Fisheries ; Macrobrachium macrobrachion ; Macrobrachium vollenhovenii ; Macrobrachium equidens ; Nigeria ; Calabar R. ; brackishwater environment ; Reproductive cycle ; Reproduction ; Shrimp fisheries ; Fecundity ; Sexual maturity
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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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    Gear considerations in the artisanal shrimp fishery of the Cross River Estuary, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22996 | 19325 | 2018-03-05 09:03:15 | 22996 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The artisanal shrimp fishery of the Cross River Estuary, SE Nigeria is exploited with three main shrimping gears, viz: beach seine, push net and trap. While the beach seine and push net are active gears, the trap is passive. Catch composition from the three gears was analysed for species diversity, catch contribution in weight and sex ratio. The trap showed the lowest species diversity, with only three Macrobrachium (M. macrobrachion, M. vollenhovenii and M. equidens) species represented in the catch, while Callinectes crab and Eleotris were by-catch. The complete absence of Penaeus notialis from trap catches throughout the sampling period of eighteen months was remarkable, while M. equidens was very low in abundance. The beach seine and push net had similar species composition in their catches with more than thirteen shrimp species represented. The catch per unit effort for the three gears varied, with beach seine contributing 46.13%, push net 24.41 % and trap 29.46%, of the overall catch. The sex ratio (male: female) was 1 :2.2 (beach seine), 1 :2.1 (push net), 1:2.15 (trap) for M. macrobrachion, 1 :1.27 (beach seine), 1 :1.32 (push net) and 1 :1.64 (trap), for M. vollenhovenii. The size structure showed more juveniles (below 40 mm) in beach seine and push net. Analysis of catches from the three gears showed some complexities as active and passive gears manifested extreme characteristics in their selection. In managing this fishery, therefore, a middle-of-the road option would be necessary, and we recommend the closed season.
    Description: Includes:- 1 table.;1 fig.;9 refs.
    Keywords: Fisheries ; Nigeria ; Cross River Estuary ; brackishwater environment ; Gear selectivity ; Gear research ; Catch statistics ; Shrimp fisheries ; Catch composition ; Stock assessment ; By catch
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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
    Repository Name: AquaDocs
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  • 90
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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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  • 91
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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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  • 92
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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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  • 95
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    Fish safety and quality: sources of contamination and hygiene indicators in fresh and processed fish (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23290 | 19325 | 2018-03-30 14:47:44 | 23290 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The knowledge of sources and routes of fish contamination is a very important aspect in maintaining the quality of safety of fish. This is paramount because the sources constitute the acess through which most unwanted microorganisms may be transmitted onto fish and fishery products. Unwanted microorganisms may be found in the final product through raw material, personal handling or mobile equipment such as forklifts, through leakage and openings in building, or through pests. Some pathogens may even become established in the processing equipment and rough contact surfaces such as fish retail tables and from niches where they can survive for long periods of time. Many of these microorganisms occur naturally in aquatic and general environments, and may be transmitted onto fish before capture, during and after processing. Also, contamination via air can occur through dust particles or via aerosols. Water is also a vehicle for transmission of many agents of diseases. Thus, the quality of the raw material, personnel hygiene, equipment used for processing, the quality of the water used and pests are key issues in this context. As for quality assurance, methods such as the Good Manufacturing Practice (GMP), Good Hygiene Practice (GHP) and Hazard Analysis Critical Control Point (HACCP) are recommended by the Codex Alimentarius Commission for use by any food processing establishment to ensure safe, wholesome and nutritious food for human consumption
    Description: 27 refs.
    Keywords: Fisheries ; Health ; Nigeria ; freshwater environment ; Health and safety ; Safety regulations ; Sample contamination ; Microorganisms ; Hygiene ; Fishery products
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    Food and feeding habits of Protopterus annectens (Owen) in River Rima, Sokoto, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23291 | 19325 | 2018-03-30 14:49:43 | 23291 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The food and feeding adaptations of Protopterus annectens (Owen) in River Rima, Sokoto, Nigeria, were studied. Fish samples were collected from August to October, 2007. The Stomach contents were analyzed using frequency of occurrence method. The fish is an omnivore, feeding mainly on other fish, crustaceans, molluscus, leaf parts, seeds, pytoplankpton and detritus. The junviles showed more indigestion towards leaf parts and detritus while the adults exhibited more diverse and complex feeding. The fish gut length was 1.1 times the body length.
    Description: Includes:- 3 tables.;17 refs.
    Keywords: Ecology ; Fisheries ; Protopterus annectens ; Nigeria ; Rima R. ; freshwater environment ; Feeding behaviour ; Food chains ; Food preferences ; Stomach content
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    A survey on utilization of aquatic macrophyte (Nymphae lotus Linn) among villages in Kainji Lake Basin (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23287 | 19325 | 2018-03-30 14:41:42 | 23287 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Social cultural surveys were carried out on the basis of questionnaire administered to the fishing families in three (3) villages that were purposely chosen due to the preponderance of the macrophyte on their water bodies. The questionnaire was designed to collect information on the cultural and ethno-botanical uses of (Nymphae lotus Linn) among the fishing communities of Kainji Lake Basin. Total of 120 respondents were randomly selected and interviewed. Study on the utilization of the macrophyte among the fishing communities confirmed that the people in the Kainji Lake Basin do consume the seeds directly as food (100%) while the leaf and petiole are used for medicinal purposes (85%). Also, the fishing communities prepare some concoction with the plant to enhance fish harvest in the river. The respondents identified eight fish species that spawn around the macrophyte, the most prevalent being Tilipia spp (17%) and the least being Prostopterus ssp 8%. The fishermen interacted with during the period of this survey do not support the total eradication of (Nymphae lotus Linn) on the water bodies, but agreed to selective control to check execessive water loss through tranpiration and to ease water travels.
    Description: Includes:- 3 tables.;1 fig.;8 refs.
    Keywords: Biology ; Fisheries ; Nymphae lotus Linn ; Nigeria ; Kainji L. ; freshwater environment ; Aquatic plants ; Emergent vegetation ; Plant utilization ; Ecology
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 38-40
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  • 98
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    Yields of Protopterus annectens (Owen) from River Rima and Goronyo Dam, Sokoto State (2021)
    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23293 | 19325 | 2018-03-30 14:52:29 | 23293 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Ninety five (95) specimena of P. Annectens (Owen) were caught from Goronyo Dam (26) and River Rima (69). The result revealed flesh yield of 44.29~c2.52 in August to 49.46~c to 5.68 in October which was not significant in samples from River Rima. The flesh yield from samples in Goronyo Dam ranged from 46-95~c2.43 in June to 54.28~c3.36 in September indicating significant difference between the months. The waste yield also varied significantly in samples from Goronyo Dam 45.72~c3.36 in September to 53.05~c 2.43 in June. However the results indicated non-significance (P〉0.05) difference in samples from River Rima with a range of 50.54~c6.68 in October to 55.71~c2.55 in August. Similarly the flesh yields were found to be higher during the dry season than in the rainy season. The sample specimens were found to contain enough flesh thereby creating potentialities to caning industries.
    Description: Includes:- 10 refs.
    Keywords: Ecology ; Fisheries ; Protopterus annectens ; Nigeria ; Rima R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Yield ; Yield predictions ; Population dynamics
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 67-70
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    Effect of smoking and oven drying on the proximate composition and sensory qualities of salted and saltless Clarias gariepinus (2021)
    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23294 | 19325 | 2018-03-30 14:53:41 | 23294 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Salted and saltless Clarias gariepinus were smoked and oven dried. Their proximate composition and sensory qualities were assessed using standard methods. The salted oven dried fish has mean values of 65.00% (crude protein); 21.90% (fat); 6.40% (moisture); and 0.79% crude fibre while the saltless had lower mean values of 64.50% (protein); 20.95% (fat);5.68% (moisture) and0.40% crude fibre. The ash content of the saltless oven dried fish 7.34% was higher than the salted 6.46%. The salted smoke dried fish has 64.07% crude protein; 20.74% (fat), 6.51 % moisture; 8.54% ash and 0.53% crude fibre. Thus, the oven dried samples have higher protein and fat values than the smoke dried samples. The salted samples have higher values of these nutrients than the saltless ones. Salting perhaps increases the availability of nutrients in smoked and oven dried Clarias gariepinus. Sensorily, there was no significant difference (P〉O.05) in taste, texture and overall acceptability of salted and unsalted smoked and oven dried Clarias gariepinus. A significant difference existed in their colour and Flavour. The colour of the saltless smoked dried fish was most acceptable. While the flavour of the 5% salted smoked dried fish was preferred. The salted oven dried fish had the highest overall acceptability score
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Cured products ; Nutritive value ; Proteins ; Body conditions ; Moisture ; Organoleptic properties
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 71-74
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    Role and contributions of the Nigerian Agricultural Cooperative and Rural Development Bank Ltd to the development of the fish industry in Nigeria (2021)
    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23296 | 19325 | 2018-03-30 14:56:34 | 23296 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The paper enumerated the mandate of the Nigerian Agricultural Cooperative and Rural Development Bank (NACRDB) which was set up by the Federal Government of Nigeria in October 2000 specifically to provide credit facilities to the less privileged. It also accepts savings, deposits and provides opportunities for self employment in the rural areas. The bank has brought this function to bear in the fishing industry by granting microcredit financing services to both artisanal fishermen, small and medium scale fish farmers. Conditions for granting loan by the bank have been well spelt out in the paper. Also discussed are problems in financing the fish industry. Some of the problems are inadequate information, lack/inadequacy of collateral, resources information, dearth of skilled manpower. In conclusion, suggestions have been offered for the way forward
    Description: Includes:- 2 tables.
    Keywords: Fisheries ; Management ; Nigeria ; Credit facilities ; Loan ; Financial institutions ; Financial resources ; Financing ; Fishery industry
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 80-87
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