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  • 1
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    Occurrence of Anisakids nematodes on frozen hake (Merluccius capensis) in Yenagoa market, Bayelsa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23419 | 19325 | 2018-04-25 19:19:35 | 23419 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Samples of the frozen hake (Merluccius capensis) were obtained once a week as corresponding to supply in Yenagoa Market Bayelsa State, Nigeria. From every supply of 10 cartons, 10 pieces of hake were examined for the presence of Anisakids nematodes. The incidence was concluded after sampling continuously every week for 8 weeks between September-November 2009. The highest parasite burden (13.2 ~c 2.28) was recorded in the second week and the lowest (8.5~c 2.9) in the 7th week, the highest mean weight of fish sample calculated was 134.80 ~c 19.16 gm in the 4th week and lowest in the 5th week with 118.30 ~c 3.56 g. The mean length was highest (29.10 ~c 1.90cm) in the second week and lowest (26.40 ~c 1.88 cm) in the 7th week. The percentage infection was 96.25% and very alarming since only 3 pieces were not infected as observed from all the samples examined.
    Description: Includes:- 1 table.;4 figs.;13 refs.
    Keywords: Fisheries ; Merluccius capensis ; Nigeria ; Yenogoa ; freshwater environment ; Parasites ; Parasite attachment ; Infectious diseases ; Frozen products ; Fish spoilage
    Repository Name: AquaDocs
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    Format: 36-40
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  • 2
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    Isolation, identification and prevalence of parasites on Oreochromis niloticus from three selected river systems (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23427 | 19325 | 2018-05-02 08:03:50 | 23427 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The prevailence of protozoan and helminthic parasite species occurring on and in the internal organs of Oreochromis niloticus were studied. Twenty samples of a mixture of adult and juvenile individuals of Oreochromis niloticus were randomly obtained from fishermen landing at the jetties of Epe water side, Ikorodu (Odoguyan) river and a brackish water (makoko), between September and and October, 2009, during a period of low rainfall. Samples were eviscerated and the parasites were excised, identified and each specie of parasites was counted. Most of the parasites encountered were of the Protozoa, manogenea, Digenea, Cestoda and Nematoda groups. The infestation was predominantly by Nematoda species and followed by protozoan species. Protozoan parasites like Trichodina sp and Ichyobodo sp were found to be prevalent, in varying magnitude, in most of the fish samples without clear age discrimination. The study reveals that the prevailence of parasites infestation increases with increasing length, size and age of the fish host and different pars of the fish.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Oreochromis niloticus ; Nigeria ; Epe ; Nigeria ; Ikorodu ; Nigeria ; Ogun R. ; freshwater environment ; Parasites ; Identification
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    Format: 78-87
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  • 3
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    Functional roles of mangroves of the Niger Delta to the coastal communities and national economy (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23434 | 19325 | 2018-05-02 08:11:31 | 23434 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Mangrove swamps supply various goods and provide invaluable ecological services, especially as critical habitats for fish breeding. These functions are discussed in the context of rural livelihoods of coastal dwellers in the Niger Delta in particular, and the contribution to national economies in general. The decline in capture fisheries production in Nigeria is partly linked to massive mangrove loss in the Niger Delta. This provides basis for urgent evolution of effective mangrove conservation schemes in the Niger Delta and for focused research on the interaction between the delta mangroves and inland/coastal fish recruitment and production dynamics.
    Description: Includes:- 23 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Mangroves ; brackishwater environment ; Mangroves ; Fishery economics
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    Format: 119-123
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  • 4
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    The last standing mangrove forest ecosystem southeast of the Niger Delta (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23437 | 19325 | 2018-05-02 08:15:15 | 23437 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Standing on the abandoned jetty at Iwuochang / Upenekang fishing beach in 1999 [Ibeno LGA, Akwa Ibom State] and looking across the Qua Iboe River [en-route the Atlantic Ocean] were strips of luxuriant mangrove vegetation all around the estuary. Surprisingly, 10 years later still standing on the same jetty and looking across the same River also, all the vegetation round about the estuary are now replaced by nipa palms with pockets of mangrove plants. The fear of the paper is that, there may be crash in fish supply from the coastal waters of Nigeria in the near future. The time to act is now and FISON must be pro-active in this coastal re-construction and re-habilitation. Nigeria’s coastal water is a ‘food-basket’; much should be done to protect and jealously cherish it ? else, it may be the last standing mangrove forest ecosystem southeast of the Niger delta.
    Description: Includes:-14 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Akwa Ibom ; brackishwater environment ; Brackishwater environment ; Mangroves ; Fishery development ; Fishery management ; Mangrove swamps
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    Format: 134-137
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  • 5
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    Occupation and health hazards in Nigerian coastal artisanal fisheries (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23436 | 19325 | 2018-05-02 08:13:37 | 23436 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: There are more occupational and health hazards in the Fishing Industry than in other occupational categories in the world. In Nigerian Industrial Fisheries, safety measures are regulated while little attention is given to safety standards in the artisanal fisheries. In West Africa, the coastal artisanal canoe fatality rates have been given in 1991-1994 to be 300 to 1,000 per 100,000 fishermen. Thus, the fatality rate in Nigerian artisanal fisheries, (coastal states) has been estimated to be 999 to 3,329 per 100,000 fishermen. The high rate is due to piracy, boundary disputes between fishing communities, unemployment, societal low value for human life and human labour. The paper discusses the various types of accidents associated with artisanal coastal fisheries and give recommendations. Fishermen have rights to safe working conditions in their working environment just as workers in offices and factories on land.
    Description: Includes:-11 refs.
    Keywords: Engineering ; Fisheries ; Sociology ; ASE ; Nigeria ; brackishwater environment ; Hazards ; Navigational hazards ; Hazard assessment ; Health and safety ; Safety regulations
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    Format: 128-133
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  • 6
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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
    Repository Name: AquaDocs
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    Format: 171-173
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  • 7
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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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    Format: 158-161
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  • 8
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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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    Format: 185-188
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  • 9
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    Effects of length of delay after slaughter (Lodas) on raw catfish Clarias gariepinus (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23418 | 19325 | 2018-04-25 19:17:12 | 23418 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of delay after slaughter on microbial quality, proximate composition and sensory scores of raw catfish, Clarias gariepinus was evaluated. A total of 52 live catfish (average weight 700.0~c7.0g) were used for the experiment. Ten freshly slaughtered fish samples each were selected for organoleptic assessment at 0, 4, 8 and 12 hours post-slaughter, while three fish samples each were selected for chemical and microbial analyses. Microbial load on fish samples increased significantly (P〈 0.05) with increase in length of delay after slaughter, LODAS. Bacteria isolated included Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Bacillus spp and Staphylococcus aureus. Percent protein and ash contents of fish samples increased with increasing LODAS, while moisture content decreased and lipid was not affected. It was observed that raw C. gariepinus retained most of its physical attributes up to 4 hours post-slaughter. These quality attributes except colour and odour of gills, deteriorated significantly (P 〈 0.05) at every successive four-hour post-slaughter interval. Significant negative correlation existed between LODAS and sensory quality of raw fish (eyes, r = -0.966, P 〈 0.05; gills, r = -0.980, P 〈 0.05; skin, r = -0.998, P 〈 0.01; and odour, r = -0.994, P 〈 0.01). This study established that quality of raw C. gariepinus deteriorated with increasing LODAS and that raw C. gariepinus was not totally unacceptable when delayed for 12 hours after slaughter at ambient temperatures.
    Description: Includes:- 5 tables.;17 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Lagos ; Proximate composition ; freshwater environment ; Organoleptic properties ; Fish spoilage ; Microbiological analysis ; Microbial contamination
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    Format: 30-35
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  • 10
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    Aqua-tourism potentials in some fishing sites in bitumen bearing wetlands of Ondo State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23433 | 19325 | 2018-05-02 08:09:53 | 23433 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 24-month survey was conducted during the wet (May- August) and Dry (October ?April) season of 2004 and 2006 along eight economic fishing sites in Ondo State bearing Wetland, with the aim of determining the abundance, species diversity of some ornamental species thus promoting ecotourism potential and preventing the loss of these species in the area during and after exploitation. The study was carried out in 4 study zones namely Odigbo (S1), Ode-Aye (S2), Okitipupa (S3), and Ilaje ese-odo (S4) noted for active bitumen seepage. Fishing potential of the area was assessed using catch per unit effort method as well as physico chemical analysis of water samples obtained from designated sites in the area in accordance with AOAC methodology. Fish compositions were assessed using multifilament gillnet, of different sizes hanging from 38 mm to 178 mm. The results revealed that the area is blessed with 24 economic species of fishes belonging to 13 families which could boost the tourist potential of Ondo State. The percentage composition of families identified varies as follows: Ariidae (2.04%), Anabantidae (3.27%), Bagridae (6.36%), Channidae (4.32%), Characidae (10.62%) Cichlidae (45.65%) Clupeidae (3.94%), Clariidae (11.78%), Hepsetidae (0.95%), Mormyridae (7.42 %), Malapteruridae (1.13%), Schilbiidae (1.76%), Polypteridae (0.76%). The family Cichlidae was the most abundant in the area during the study period. The diversity of fish during the study varied with locations and season .The study showed higher fish population during the dry season than raining season and lower population in study zones highly polluted by bitumen seepages. The study emphasizes the need for sustainable resource management during bitumen exploitation.
    Description: includes:- 2 tables.;1 fig.;12 refs.
    Keywords: Fisheries ; Nigeria ; Ondo State ; freshwater environment ; Fish consumption ; Tourism ; Recreation ; Stock assessment
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    Format: 114-118
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  • 11
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    Issues and constraints in the coastal fisheries of the Niger Delta area of Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23435 | 19325 | 2018-05-02 08:12:28 | 23435 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The Niger Delta serves as the economic nerve centre of the Nigeria Federation with its vast oil deposits. However the question is how far has the coastal fisheries thrived in the Niger delta since the discovery of crude oil? Fishing is the predominant occupation in the coastal communities. The Niger Delta is home to Nigeria’s oil industry. However, this ‘blessing’ has become a challenge for the people of the Niger Delta. They have suffered environmental devastation, economic poverty, and constant conflict. This paper discusses issues and challenges facing fisheries development in Niger-Delta area of Nigeria.
    Description: Includes:- 6 refs.
    Keywords: Fisheries ; Nigeria ; Niger Delta ; marine environment ; Fishery development ; Resource development
    Repository Name: AquaDocs
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    Format: 124-127
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  • 12
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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
    Repository Name: AquaDocs
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    Format: 147-152
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  • 13
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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
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    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
    Repository Name: AquaDocs
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    Format: 138-143
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  • 14
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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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    Format: 153-157
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  • 15
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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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    Format: 189- 195
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  • 16
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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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    Format: 226-231
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  • 17
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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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    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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    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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    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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    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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    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
    Details
    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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    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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    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
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    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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    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
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    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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    Shellfish resources in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23528 | 19325 | 2018-05-09 12:49:35 | 23528 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Nigeria is a coastal state with a coastline of 853km which lies between 4o 10’ to 6o20’N and longitude 2o 45’ to 8o 5’ E. The Nigerian coastline stretches from the Western border with the Republic of Benin to the eastern border with the Cameroon Republic. Some of the coastal characteristics which are of importance to the Nigerian inshore demersal fisheries are the presence of thirty-six estuaries and the prominent Niger Delta which provides suitable habitat for the penaeid shrimps, finfish and other living marine resources. Nigeria has a wide variety of shellfish resources ranging from the molluscs such as ark clams (Senila senilis), cockles costatum), periwinkle (Tympanotonus fuscatus) to the crustaceans which includes the penaeidae (shrimps), palaemonidae (prawns), portunidae (swimming crabs) and palinuridae (lobsters). Estimated potential yield for shellfishes is 51,760 metric tonnes. Shrimps and prawns have the highest commercial importance with production estimate between 10,000 to 15,000mt. More than half of this figure is exported to the Organization for Economic Co-operation and Development (OECD) countries with shrimp market valued at US $8.6 billion. Nigeria generated about US $54million in 2005 from export of shrimps and prawns alone. This figure decreased to about US $38million in 2007 due to harassment by sea pirates and militant groups thus decreasing production from 13,767mt in 2006 to an alarming 5,995mt in 2007. However more research needs to be done to ascertain the true potential yield and environmental carrying capacity of the Nigerian shellfisheries to determine the maximum sustainable yield (MSY) so as to prevent over exploitation and consequently the destruction of the fishery. Research should also be carried out on other shellfish resources such as crabs, oysters, periwinkles and lobsters as appreciable income could be earned from their sales and export.
    Description: Includes: 2 tables.;1 fig.;11 refs.
    Keywords: Biology ; Fisheries ; ASE ; Nigeria Coast ; marine environment ; Shellfish fisheries ; Crustacean fisheries ; Mollusc fisheries
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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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    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
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    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
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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
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    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
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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
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    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
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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
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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
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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
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    Legal tools for combating piracy in Nigerian waters (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23535 | 19325 | 2018-05-10 09:53:19 | 23535 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper traced the evolution of piracy and pointed out that the fishing industry in Nigeria alone has recorded over 15 deaths and loss of vessels, equipments, fish/fishery products valued over N3 billion to these attacks between 2006 and April 2009. The paper further highlighted that between February 2009 and April 2010 the fishing industry has recorded about 80 attacks. These have affected the fishing industry which operated over 250 registered trawlers in 2003/2004 which has now been reduced to 150 trawlers. To ameliorate this problem the paper highlighted steps taken in dealing with the menace of piracy. The paper concluded that good laws are a necessary pre-condition for the achievement of maritime security. However, they will only be effective if there is the political will and the practical capacity among the government, relevant agencies and stakeholders.
    Description: FISON EKO 2010: Invited paper presented by N. Ahmed. Pagination on document pp. 1-13. First presented by M. Orakwusi at the 2nd Western Naval Command Law Seminar, 7 Oct 2010
    Keywords: Fisheries ; Law ; ASE ; Nigeria Coast ; Priracy ; marine environment ; Illegal fishing ; Fishery protection ; Fishing rights
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    Review of crude oil pollution effects on fish and fisheries of Nigerian waters (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24177 | 19325 | 2018-05-13 19:01:32 | 24177 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper reviews some adverse effects of crude oil pollution on fish and fisheries in Nigerian waters. The main causes of spillage include blowout, sabotage, corrosion of pipeline, equipment malfunction, operations/maintenance error etc. There are spillage records from 1976 to 1997 with respect to the yearly oil spill incidents, the sizes of spill in relation to the ecological operational areas and the causes of oil spills in relation to sources of oil spill within oil operation. Based on the observation from the analyses of the spillage reports, several steps were recommended in order to reduce the incident of crude oil spillage in Nigeria petroleum industry for the safety of our fragile water bodies and the fisheries resources stock in them.
    Description: Includes: 3 tables.;Also includes: 14 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Niger Delta ; freshwater environment ; Crude oil ; Pollution effects ; Water quality ; Oil spills ; Pipelines ; Lake fisheries ; Oil pollution ; Pollution surveys ; Pollution control
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    Evaluation of slurry formulations for processing of kilishi of bony tongue (Heterotis niloticus, Cuvier) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24178 | 19325 | 2018-05-13 19:03:41 | 24178 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The kilishi of Heterotis niloticus was produced for determination of appropriate slurry formulations for fish kilishi preparation. Thirty six freshly caught samples of H. niloticus with average weight of 306.20 ~c 18.33g, kilishi of this species was prepared with three different slurry formulations of high (F1), medium (F2) and low (F3) proportions of groundnut dough to spice mixture in the ratio of 1.3: 1.0, 1.0: 1.2 and 1.0: 1.8, respectively. Results of proximate composition indicated that kilishi of the H. niloticus prepared with formulation 3 (F3) recorded significantly higher (p〈0.05) protein content (54.22 ~c 0.01 %) and lower lipid content (8.00 ~c 0.00%), despite recording significantly higher (p〈0.05) moisture content (9.93 ~c 0.07%). Sensory score of kilishi of H. niloticus processed with F3 formulation rated significantly higher (p〈0.05) for taste, flavour and general acceptability with mean scores of 5.94 ~c 0.21,5.77 ~c 0.20 and 5.50 ~c 0.22, respectively. It could be concluded that kilishi of H. niloticus prepared with F3 formulation was the most acceptable hence, recommended for use in kilishi production.
    Description: Includes: 4 tables.;Also includes: 20 references.
    Keywords: Fisheries ; Heterotis niloticus ; Nigeria ; Sokoto ; Kilishi ; Heterotis niloticus ; Spices ; Proximate analysis ; Organoleptic assessment ; freshwater environment ; Freshwater fish ; Fishery products ; Processing fishery products ; Drying ; Packing fishery products ; Organoleptic properties ; Water content ; Enzymes ; Microorganisms
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    The role of biotechnology in aquaculture and fisheries development (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24204 | 19325 | 2018-05-16 15:29:46 | 24204 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Biotechnology per se is not a panacea for the world's problems of hunger and poverty. However, genetic engineering in particular, offers outstanding potentials to increase the efficiency of animal improvement. Thus, biotechnology could enhance global food production and availability in a sustainable way. Case studies from Egypt and India also demonstrate that highly immune genetically modified fishes, transgenic fishes, chromosome engineering and gene banking are very appropriate for fish farmers and consumers in developing countries. As the entire technology can be packaged into the germ cells of fish, it can easily be integrated into traditional small-holder fish farming systems. Except for a few innovative transfer projects, though, the application of biotechnology until now remains concentrated in the industrialized world. Combined with insufficient own scientific and regulatory capacities, the increasing privatization of international aquacultural and fisheries research and the strengthening of intellectual property rights complicate the access of developing countries to biotechnology. Profound constitutional adjustments are therefore essential to ensure that biotechnology does not bypass the poor.
    Description: Includes: 15 references.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ebonyi State ; freshwater environment ; Biotechnology ; Sustainability ; Genetically modified organisms ; Gene banks ; Fish culture ; Aquaculture development ; Food security
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    Microbial load on smoked fish sold in Ibadan, Oyo State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24208 | 19325 | 2018-05-19 06:39:34 | 24208 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The microbial load of four different fish species from five different market locations in Ibadan metropolis were determined using standard microbiological procedures. The bacteria count of fish sampled from Ojo market was the highest while the bacteria count of the fish sample from Bodija market was the lowest. There was no significant difference (p〈0.05) in the microbial load of the fish sampled from various market locations in Ibadan metropolis. Similarly, there was no significant difference (p〉0.05) in the microbial load on various fish species sold in Ibadan metropolis. The isolated bacteria from the study were: E. coli, Salmonella spp, Klebsiella spp, Staphylococcus aureus, Aerosomonas spp, Pseudomonas spp, Vibrio spp, Serratia spp, Chromobacterium spp, Enterobacteria spp and Shigella spp. The fungi count of fish sampled from Omi markets was the highest while the fungi count of the fish sampled from Ojo market was the lowest. The following fungi were however isolated from the study: Aspergillus flavus, Penicillium spp, Fusarium oxysporum, Trrichoderma spp and Ceotrichium albidium. The study shows that reheating may be necessary to destroy or inactivate micro-organisms in smoked fish before consumption.
    Description: Includes: 2 tables and 2 figures.;Also includes: 17 refernces.
    Keywords: Fisheries ; Nigeria ; Ibadan ; Bacteria ; Fungi ; Market ; Fish species ; freshwater environment ; Microbial contamination ; Microorganisms ; Bacteria ; Freshwater fish ; Cured products ; Sample contamination ; Fungi ; Public health ; Quality assurance ; Disinfection
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    Morphometric features and proximate body composition of rocky freshwater prawn (Caridina africana, Kingsley 1882) at Erin-Ijesa waterfalls, Osun State Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24209 | 19325 | 2018-05-19 06:41:34 | 24209 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: An investigation was conducted on the morphometric features and proximate body composition of rocky freshwater prawn, Caridina africana occurring at Erin-Ijesa Waterfalls in Osun State, Nigeria. The adult prawns were collected at the first layer of the Waterfalls using scoop nets and locally fabricated sieves because of the shallow nature of the water body and tiny size of the species. Morphometric features were measured using measuring board and Vernier calipers while the proximate analysis was determined by atomic absorption spectrophotometry in the laboratory. The morphometric variables placed the species correctly into the Infra order Caridea and family Atyidae because the first and second chelipeds were shorter than the remaining three pairs of walking legs. Male prawns were significantly bigger (p〈0.05). than the females as revealed in the morphometric features. The proximate analysis showed that C. africana is composed of 58.79% protein, 5.42% lipid, 11.56% carbohydrate, 14.7% ash and 0.21 % crude fibre. The micro-nutrient composition included iron, zinc, copper, nickel and cadmium. The values for these nutrients make the study to suggest that C. africana could be a nutritive food bio-material for humans and other livestock nutrition especially the fin-fish aquaculture programme.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Biology ; Fisheries ; Caridina africana ; Nigeria ; Erin-Ijesa waterfalls ; Morphometrics ; caridina africana ; Proximate composition ; Micrinutrient ; Erin-Ijesa waterfalls ; freshwater environment ; Morphometry ; Biochemical analysis ; Shrimp fisheries ; Body conditions ; Nutritional requirements ; Nutritive value ; Lake fisheries ; Artisanal fishing ; Males ; Females
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    Food and habits of the Batrachoid, Batrachoides liberiensis off the Qua Iboe River estuary, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24223 | 19325 | 2018-05-19 07:09:15 | 24223 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: We studied the trophic attributes of the toadfish, Batrachoides liberiensis off the Qua Iboe River estuary Nigeria, between August 2008 and July 2009. The fish species has no well defined stomach; the intestine was used as gut. Gut contents analysis of 360 specimens of the toad fish revealed that 11 food items (Penaeus notialis, Sersama alberti, crayfish remains, unid fish, fish bones, fish remains, unid gastropod, insect remains unid clam and sand grains)] were ingested. The food items were re-assigned into 6 major ecological categories based on food ponderal index (%FPI): Pisces (FPI= 35.33%), Crustacea (FPI= 20.73%), unid Gastropoda (FPI=14.32%), Mollusca (FPI= 12.48%), Insecta (FPI= 11.64%) and FPI of 5.50% sand grains. Males were significantly higher in feeding intensity (Average gut fullness, AGF: t = 2.083, 358 df, P〈0.05) vis-a-vis the females. There were similarity in rank-order of the seasonal dietaries (spearman-rank correlation: rs = 0.871, P〈0.02). Sex ratio was male-biased. B. liberiensis in the Qua Iboe estuary is carnivorous, exhibiting affinity to piscine as major dietaries.
    Description: Includes: 11 references.
    Keywords: Ecology ; Fisheries ; Batrachoides liberiensis ; ASE ; Nigeria ; Iboe River. ; Batrachoides liberiensis ; Qua Iboe River Estuary ; Nigeria ; Trophic attributes ; brackishwater environment ; Food ; Feeding ; Stomach content ; Food consumption ; Artisanal fishing ; Fishery surveys ; Food composition ; Food preferences ; Brackishwater fish
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    Effect of zinc on the distribution of major cations and anions in the muscle of the fresh water catfish Clarias gariepinus (Burchell, 1822) collected from Ebonyi River, South East Nigeria (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24214 | 19325 | 2018-05-19 06:50:34 | 24214 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of zinc exposure evaluated during a four day exposure periods at 13.88ppm, 26.75ppm, 53.5ppm,107ppm and 214ppm to Clarias gariepinus sub-adults showed the 96h LC50 as 26.62ppm. The threshold value was 20.30ppm. The muscle of the exposed fish analyzed showed a significant decrease in all the major cations and anions (Na+, CL-, Ca2+ K+, Mg2+) at (p〈0.05). The research revealed that there was no total inhibition of uptake of the cations and anions and also that uptake of these metals, that is cations and anions (Na+,-CL-, Ca2+ K+, Mg2+) increased rapidly during the 24 hours and dropped at 48 hours and 72 hours and gradually increased at the end of 96 hours showing that it was time dependent. During exposure period, affected fish stood in upright position with their snouts above the water surface, gasping for air. Observation of the exposed fish showed that they were peeling of skin, increase in opercula movement, erratic swimming, quietness and finally death. This research therefore recommends that zinc should be applied appropriately at 26.30ppm to avoid death of fish, man and other aquatic organisms that are the chief consumer.
    Description: Includes: 13 references.
    Keywords: Pollution ; Fisheries ; Clarias gariepinus ; Nigeria ; Ebonyi State ; Ebonyi River ; Zinc ; Muscle ; Cations ; Anions ; Clarias gariepinus ; Zinc ; Freshwater fish ; Cations ; Pollution effects ; Trace metals ; Bioaccumulation ; Muscles ; Pollutants ; Anions ; River fisheries ; Lethal limits
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    Organoleptic assessment of processed freshwater clam (Galatea paradoxa) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24186 | 19325 | 2018-05-16 14:43:21 | 24186 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: Organoleptic characteristcs and eating acceptability of different processed fresh water clam (Galatea paradoxa) from Bayelsa state, Nigeria was evaluated. One hundred and fourteen (114) samples of clam (Galatea paradoxa) used for the processing experiment were obtained from Amassoma market. All samples were processed traditionally viz: smoked-dried, cooked with banga sludge and fried respectively. Thirty six (36) member taste panel were randomly selected to evaluate the organoleptic characteristics of the samples. Acceptibility of product was scored on a 6-point hedonic scale. The highest ratings of organoleptic characteristics were recorded for fresh water clam samples prepared by frying (5.24 ~c 0.54) while the least (4.47 ~c 0.27) was recorded for samples that were prepared by cooking with water (P〈0.05). The results revealed that males had a preference for fried clam product while females had equal preference for clams fried and cooked in palm kernel sludge. The highest acceptability (88.89%) was observed in the samples that were subjected to frying method, while the least (80.56%) was recorded for samples that were smoked-dried. More research should be geared towards packaging these products for export.
    Description: Includes: 3 tables:;Also includes: 9 references.
    Keywords: Fisheries ; Galatea paradoxa ; Nigeria ; Niger Delta ; Acceptability ; Clams ; Organoleptic ; Processing ; freshwater environment ; Clam fisheries ; Shellfish ; Organoleptic properties ; Acceptability ; Processed fishery products ; Evaluation ; Cured products ; Acceptance tests ; Nutritive value ; Proteins ; Texture ; Odour ; Taste tests ; Freshwater molluscs ; Product development
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    Nutrient composition of frozen and smoked fish specimens of Oreochromis niloticus, Labeo coubie and Mormyrops deliciosus from River Niger (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24195 | 19325 | 2018-05-16 15:12:41 | 24195 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish is one of the most nutritious diet on earth, and contributes a considerable proportion of its protein to the Nigerian populace. Fifty-four specimens composing of six samples from each species, were analyzed in frozen and smoked states, monthly. Each set of six specimens were cut into two equal parts and randomly re-arranged into two groups. One group was smoked while the other was preserved in the freezer (at-2~'C) for 5 days. The highest moisture content was observed in frozen samples of Mormyrops deliciosus thus: (77.14 ~c 11.05%). Smoked O. niloticus had the highest protein content (26.79 ~c 0.74%) while the least was observed in frozen Mormyrops deliciosus (13.37 ~c 2.57%). Smoked samples of Oreochromis niloticus recorded the highest fat content accounting for a value of (25.97 ~c 0.51 %) while the least was observed in frozen Mormyrops deliciosus (7.97 ~c 0.45%). It could be concluded that while frozen samples loosed nutrient, smoked ones gained nutrients in all three species. The study recommends that fish be consumed in their smoked state, in preference to frozen ones, in response to higher nutritive value. Oreochromis niloticus which recorded the highest nutritive value in crude protein content, should be consumed more, followed by Labeo coubie and Mormyrops deliciosus in that order.
    Description: Includes: 2 tables.;Also includes: 10 references
    Keywords: Fisheries ; Mormyrups deliciosus ; Oreochromis niloticus ; Labeo coubie ; Nigeria ; Niger R. ; Nutrient omposition ; Frozen ; Smoked ; Oreochromis niloticus ; Labeo coubie ; Mormyrups deliciosus ; freshwater environment ; Freshwater fish ; Frozen products ; Cured products ; Nutritive value ; Comparative studies ; Processed fishery products
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    Trophic ecology of fishes: consolidating the basic (traditional) methods (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24226 | 19325 | 2018-05-19 07:15:01 | 24226 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: Studies of food and feeding ecology are important to investigate trophic interrelationships of fishes in their resident water bodies. These are usually achieved using various important methods. However because no single measure gives an overall representation of the feeding habits of fish, best results are achieved only when methods are used to complement one another. This paper reviews various methods used in studying trophic fish ecology and suggests consolidation of the traditional or basic methods with relevant statistical indices and local ecological knowledge. More advanced methods are also proposed as valuable tools because they compensate for some possible errors that may arise from the use of quantitative methods.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Oyo State ; freshwater environment ; Ecosystems ; Trophic levels ; Interspecific relationships ; Trophic relationships ; Food ; Ecology ; Consolidation ; Methodology ; Feeding behaviour ; Stomach content ; Food webs ; Statistical analysis ; Fish culture
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    Reproductive efficiency as a function of age in estuarine catfish, Chrysichthys nigrodigitatus of the Cross River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24206 | 19325 | 2018-05-16 15:35:04 | 24206 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study was conducted on the reproductive efficiency of Chrysichthys nigrodigitatus of the Cross River. The objective was to determine the influence of age on eggs size and fecundity. Forty four females of Chrysichthys nigrodigitatus were sampled from April, 2011 to March, 2012. Fecundity and eggs size were measured in relation to fish size. The relationship between egg size and fish size produced a parabolic curve. This implies that younger fish and older fish were less efficient in terms of eggs size and quality while the middle aged fishes were more efficient in terms of eggs size and quality. Similarly, there was an inverse curvilinear relationship between number of eggs per unit weight and somatic weight of the fish. Younger fish are less efficient because of the physiology of growth, while the older fishes are less efficient because of reproductive senescence. Management strategy for the stock therefore requires the conservation of the middle aged individuals for increase in reproduction. Also in aquaculture the middle aged class should be used as broodstock for excellent results.
    Description: Includes: 2 figures.;Also includes: 13 references.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Cross River ; Brackishwater fish ; Reproduction ; Efficiency ; Biological age ; Eggs ; Fecundity ; Size ; Food fish
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    Length-weight relationships and relative condition factor of twenty important marine fish species off Lagos coast, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24203 | 19325 | 2018-05-16 15:28:10 | 24203 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on the length-weight relationship and condition factor (k) of 6,254 fish samples representing 20 species belonging to 11 families of important marine fishes off Lagos coast, Nigeria. They were collected with a trawl net (cod-end 20mm mesh size), trawled at different depth ranging from 10m-100m between May and June 2009. The estimated 'b' value (regression coefficient) of the equation W = aLb ranged between 2.29 and 3.46 with mean and mode values of 2.78 ~c 0.28 and 2.79 respectively while the 'a' value (regression constant) ranged between -2.6019 and -0.9023 with mean value of -1.6899 ~c 0.40. The condition factor (k) ranged between 0.52 and 11.89 with mean values of 2.71 ~c 2.64. Fish species of Nigeria coastal water are dominated by Pseudotolithus senegalensis which is about 13.4% of the total fish samples and their growth trend is mostly isometric (exhibit dimensional equality of the body parameters). All the species studied are in good condition (k〉 0.5).
    Description: Includes: 1 table and 5 figures.;Also includes: 20 references.
    Keywords: Ecology ; Fisheries ; Pseudotolithus senegalensis ; ASE ; Nigeria ; Lagos Lagoon ; Lenght-weight relationship ; Condition factor ; Marine fish species ; Trawl ; Isometric ; Nigeria ; freshwater environment ; Length-weight relationships ; Condition factor ; Marine fish ; Trawl nets ; Coastal waters ; Fishery surveys ; Marine fisheries ; Check lists ; Population structure ; Dominant species
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    Challenges of inland artisanal fish production in Nigeria: economic perspective (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24600 | 19325 | 2018-05-21 12:14:25 | 24600 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fishery production is significant to Nigerian economy in view of its roles in providing cheap source of food/nutrition security, income, employment, serves as source of foreign exchange, particularly those of the riparian communities. Despite these significant roles, fisheries subsector is faced with huge challenges, such as: decreasing yield, inefficient management of fishing policy, inadequate technological and commercial knowledge among others, thereby limiting its production potentials. The possibility of fish production especially artisanal fisheries to match up with fish productivity in the economy depends on fishing operation, efficient use of laboour, sustainable and efficient management of fishing policy. Therefore the essence of this study is to review the challenges in fish production in Nigeria, Economic perspective, with emphasis on the role of fisheries in economic development, decreasing fish yield, market forces and resource inefficiency.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Nigeria ; Fishery ; Economic perspective ; Challenges and production ; freshwater environment ; automation
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    Efficiency of different traps for silver catfish fishery and its aquaculture implications in the face of climate change (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24601 | 19325 | 2018-05-21 12:17:22 | 24601 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Climate change has the potential to severely impact coastal and inland environments and ecosystems, and by extension fisheries and aquaculture. Coastal regions of the world are already experiencing flooding due to rise in sea level. In recent times, salinization of coastal areas due to flooding from storm surges and high tidal influence has been observed. Aquaculture is a fast growing agri-business venture in Nigeria presently and many coastal communities derive their livelihood from it. The culture of freshwater fish species that are very sensitive to high salinity may be threatened leading to mortality of stocked fish and loss of livelihood for coastal population. Consequently, there is urgent need for development and domestication of the Silver catfish, Chrysichthys nigrodigitatus that can tolerate higher salinity more than Mudcatfish (Clarias gariepinus). This will help mitigate the impact of salinization of coastal areas arising from sea water flooding on culture of fresh water fish species.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Clarias gariepinus ; Nigeria ; Climate change ; Silver catfish ; Chrysichthys nigrodigitatus ; freshwater environment ; automation
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  • 51
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    Effects of sub-lethal concentrations of glyphosate on behaviour and some biochemical parameters of African catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24614 | 19325 | 2018-05-24 09:35:20 | 24614 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The sub-lethal effect of glyphosate on behavior and some biochemical parameters of African catfish, Clarias gariepinus were investigated using static renewal bioassays and continuous aeration for a period of 28 days using varying concentrations (100ppm, 200ppm, 300ppm, 400ppm and 500ppm). During the exposure period, the fish showed different abnormal behaviours such as restlessness, loss of balance, respiratory distress, grouping together, darting movements, loss of equilibrium, mucous secretion and erratic swimming. At the end of the experiments, the fish were sacrificed and the blood samples were collected. The gill and liver of the fish were removed from biochemical bioassay. Compared with the control, the result showed a significant increase (P〈0.05) in the activities of alanine amino transferase (ALT), and aspartate amino transferase (AST), in both the blood and the gill of exposed fish except in liver where it showed a significant reduction. However the values of lactate dehydrogenase (LDH) and superoxide dismutase (SOD), showed significant increase in the blood with a noticeable decrease in both the gill and liver of exposed fish. The study showed that sub-lethal concentratiom of glyphosate are harmful to Clarias gariepinus. This study shows that sub-lethal concentrations of glyphosate is harmful to Claria gariepinus. The implication of these results in rational exploitation and conservation of fishery resources and the public health risk consuming glyphosate-exposed to fish are highlighted.
    Description: Includes: 22 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Glyphosate ; sub-lethal ; Biochemical ; Conservation ; Public health ; freshwater environment ; automation
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    Observation on the sex ratio, fecundity, egg size and gonadosomatic index of grey mullet (Mugil cephalus) from high brackish tropical lagoon (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24627 | 19325 | 2018-05-22 06:26:49 | 24627 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The 2661 specimens of the striped mullet, Mugil cephalus L. used for this study, were collected from high brackish lagoon in southwest Nigeria for 24 months. The size of the 2661 specimens of M. cephalus used for this study ranged from 1.7- 29.5cm standard length (total lenght 1.9 to 39.0cm). The sex ratio for M. cephalus was 1:0.53 and this showed a statistically significant (p〈0.05) dominance of the male over the females for the size range. The fecundity estimates varied from 635,568- 1,520,185 and was positively correlated to the fish and weight. Oocyte diameter averaged 409.64 ~c 40.67pm and this is indicative of an early stage of gonad maturation of the specimens in the lagoon before final spawning occurred. The GSI indicated that spawning activity occurred from December to May in the open ocean.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Mugil cephalus ; ASE ; Nigeria ; Lagos Lagoon ; Mature ; Spawning ; Specimen ; Male ; Female ; brackishwater environment ; automation
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    Growth pattern and specificity of attachment of lagoon crab (Callinectes amnicola) fouled with barnacles (Chelonibia patula) from Lagos Lagoon, Southwest Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24635 | 19325 | 2018-05-23 07:59:06 | 24635 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The growth pattern and condition factor (K) of 810 Lagoon crabs (Callinectes amnicola) fouled with Barnacles (Chelonibia patula), collected from Makoko Jetty, off Lagos Lagoon between April-September 2011 were studied. The carapace length f C. amnicola examined ranged from 3.8cm-8.6cm while the carapare width ranged from 9.5cm-15.4cm. The total weight ranged from 53.1g to 165.0g, indicating that increase in length correspond to increase in weight, thereby suggested that C. amnicola from Lagos Lagoon exhibited a negative allometric growth. The correlated coefficient 'r' for the crabs was 0.68, showing a low correlation between carapace length weight in the lagoon crabs fouled with barnacles. The condition factor (K) values of C. amnicola fouled with barnacles ranged from 3.2-9.7 with a mean value of 5.4. The highest K-value was recorded for the size group 3.5-4.4. The value decreased with increased length of C. ammcola. The sex ratio (1:80) indicated that there were more females (98.8%) than males (1.2%), 12 (1.5%) of the 810 lagoon crabs examined were heavily fouled with barnacles distributed all over the points of attachment with the cora having the most attachment (91.6 6%). Average diameter of the barnacles attached to the crabs ranged from 0.23cm to 1.85cm. The distribution shows that large-sized crabs had much banacles attached to them than small-sized crabs, with greater barnacles found in the females than in the males.
    Description: Includes: 25 references.
    Keywords: Ecology ; Fisheries ; Callinectes amnicola ; Chelonibia patula ; Nigeria ; Lagos Lagoon ; Callinectes amnicola ; Specificity ; Lagoon ; Condition factor ; Sex ratio ; freshwater environment ; automation
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    The identity of Schilbe intermedius in Jebba Lake, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24630 | 19325 | 2018-05-22 06:31:54 | 24630 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study attempts to ascertain the identity of Schilbe intermedius (Family: Schilbeidae) in Jebba Lake using quantitative (mophometric and meristic) and qualitative (colour and shape) parameters that makes identification easier. One hundred (100) specimens were collected and used for the study. There was relationship between body weight and length of fish (a=0.039, b=2.332, r=5.96). The parameters are similar to description of other authors. There is also absence of adipose fin found in the species, which is due to the geographical location.
    Description: Includes: 14 references.
    Keywords: Ecology ; Fisheries ; Schilbe ; intermedius ; Nigeria ; Jebba Lake ; Morphometric ; Meristic ; Butterffish ; Jebba Lake ; freshwater environment ; automation
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    Current trends of fish processing in Jabi Lake area (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24672 | 19325 | 2018-05-23 07:47:49 | 24672 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A survey of the fish processing practices of the fishing settlement around Jabi lake area in the Federal Capital Territory (FCT) was conducted. The main purpose of constructing the reservoir is to serve as the main source of water supply to the FCT, fishing and fish processing became prominent. Fishermen are recording very low fish catch and the level of hygiene in fish handling practices is very low. The processors are majorly involved in smoking and frying which is dominated by 79% of middle aged young men whereas, 21% are women. The scale of fish processing in Jabi Lake area is still at the subsistence level. Furthermore, the processors do not package the processed fish products, rather they gather them in baskets and plastic bowls. FCT resideents usually procurelive and smoked fish from Kado fish market.
    Keywords: Fisheries ; Nigeria ; Jabi Lake ; Fish processors ; Livelihood and fish processing ; freshwater environment ; automation
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    Effects of spices on the chemical properties of hot-smoked catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24673 | 19325 | 2018-05-24 09:33:52 | 24673 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Effect of spices on the chemical properties of hot-smoked catfish (C.gariepinus) was examined. The experimental design was complete randomized design (CRD) with the treatments been the variously spiced hot-smoked catfish (garlic, ginger, garlic-ginger homogenate spiced and the control without spices). Proximate and mineral content analyses were carried out using standard experimental procedures. There exist significant differences (p〈0.05) in the percentage moisture and crude protein content with smoked catfish without spices having the highest moisture content with mean value 6.18 ~c 0.13 and 79.44 ~c 0.13 respectively which could be as a result of the increase in the fibre content of the spiced fish products which is a function of fibre content of the spices applied to the fish products. Similar trend was also observed for the lipid and ash contents the fish products. There exist significant differences (p〈0.05) in the mineral content preseent in the various fish products with the exception of magnesium. The products are rich in calcium and other minerals with garlic-ginger homogenate spiced product having the highest level of calcium (0.980 ~c 0.02).
    Description: Includes: 25 references.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Spices ; Organoleptic properties ; Chemical properties ; Hot-smoked ; C. gariepinus ; freshwater environment ; automation
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    Modification of NIFFR multipurpose smoking kiln with insulation (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24669 | 19325 | 2018-05-23 07:44:23 | 24669 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on the old NIFFR smoking kiln in order to improve on it. The parameters used to determine the smoking efficiency include the loss in weight of the fish samples, temperature and the time taken to properly smoke the fish using fire wood as smoking fuel. The smoking kiln was tested by smoking three different species of fish: Clarias gariepinus, Oreochromies niloticus, Synodontis membranecious over a period of two hours. The modified smoking kiln was discovered to perform faster. Its advantage over the already existing one is that it is faster in smoking fish to a regular golden brown colour. The temperature of the heat supplied was quite higher about 100~'C to 120~'C than the commonly used drum oven. The smoking kiln has the average oroduction cost of No.90,000.
    Description: Includes: 9 references.
    Keywords: Fisheries ; Nigeria ; Fish ; Wire mesh tray ; Mild steel ; Chimnet ; Damper plate ; freshwater environment ; automation
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    Acute toxicity of 2, 3-dichlorovinyl dimethyl phosphate (Sniper 1000EC) and response of Clarias gariepinus Burchell under laboratory conditions (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24215 | 19325 | 2018-05-19 06:53:11 | 24215 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study investigated the acute toxicity of 2, 3-dicholrovinyl dimethyl phosphate (Sniper 1000EC) on the African mud catfish, Clarias gariepinus juveniles (mean weight 19.47 ~c 1.05g) using static bioassay method. Sniper 1000EC is an organophosphate pesticide. Each treatment in the acute test was in triplicate with bioassay media concentration of 0,5, 10, 15 and 20 mg/l. Data on mortalities of fish, water physic-chemical parameters as well as changes in haematological indices were subjected to one way analysis of variance (ANOVA) at 5% probability level. Duncan multiple range test was used to separate differences between the means. The 96hr LC50 estimated by probit analysis during the exposure was found to be 8.20mg/l. Behavioural abnormalities of the exposed fish included erratic and uncoordinated swimming and bleached skin with lesion at the highest concentration (20mg/l). Blood dyscrasias attributable to the toxicant was observed with a significant (p〈0.05) decrease in haemoglobin, haematocrit, red blood cells, white blood cells, lymphocytes and monocytes. Mean corpuscular volume (MCV), Mean corpuscular haemoglobin (MCH), neutrophils, eosinophil and basophil increased significantly (p〈0.05) with increasing concentrations of the toxicant. These abnormalities in body and blood parameters as a result of exposure to the toxicant make the study to recommend that the use of Sniper 1000EC by local fishermen be banned to preserve aquatic lives in Nigerian inland water bodies.
    Description: Includes: 22 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Niger State ; Sniper 1000EC ; Clarias gariepinus ; Toxicity ; Haematological indeces ; freshwater environment ; Toxicity ; Phosphate deposits ; Response analysis ; Freshwater fish ; Juveniles ; Bioassays ; Toxicity tests ; Physicochemical properties ; Controlled conditions ; Haematology ; Pollution monitoring
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    Potential impact of climate change on fisheries and aquaculture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24584 | 19325 | 2018-05-20 15:57:28 | 24584 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Climate change will have significant impacts on Nigeria's freshwater and marine aquatic systems. and hence on the countries fisheries and aquaculture. Fisheries and aquaculture are highly vulnerable to changes in weather pattern. and the impacts, which could be negative or positive, will vary from the coastal areas to the drier northern parts of the country. Elevated water temperalures will affect fish physiological processes, thereby affecting spawning. survival of the juveniles, recruit into the exploitable phase of population, population size, production and yield. The impacts of increased flooding of the freswater bodies will be negative through erosion of watershed, destruction of fish feeding and breeding habitats, decrease in primary productivity and alteration of the normal resilience of the aquatic systems, or positive in expansion of aquatic habitats for primary and fish productions especially during the dry season. Drought will exacerbate draw down of the lakes and reservoirs, and insufficient flow in the river hasins for spawning and primary pro duction thereby affecting fish production. Rise in the water level of the Atlantic ocean will lead to intrusion of more salty wafer into The river delta areas, and inundation of the coastal low-lying areas, thus affecting distribution of both the freshwater and marine fishes as a result of changes in the physical and chemical properties of the waters. The impacts will ultimately affect fish population, production and supply, thereby affecting the livelihood of over 26 million people engaged in the primary and secondary sectors of the fisheries industry, as well as food security of the country. The adaptation and mitigation strategies will be based on the peculiar characteristics and interactions of fisheries and aquaculture within the framework of feasible policy instruments. Strategies and policy measures need to be evolved to combat the observable and projected impacts of climate change on fisheries and aquaculture, in order to protect the livelihoods of the fishing communities and food security.
    Description: Includes: 13 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Fisheries ; Nigeria ; Climate change ; Fisheries ; Aquaculture ; Impacts ; Mitigation ; Food security ; freshwater environment ; automation
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    Benefit related relationship among artisanal fisher folks of Tombo fish landing community (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24603 | 19325 | 2018-05-21 12:20:04 | 24603 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Benefit related relationship among the artisanal fisher folks of Tomho, a fishing community in Western Rural District of Sierra Leone was studied. The study was carried out to ascertain the socioeconomic activities of the target group, their level of involvement and reasons for going into transactional sexual activities. Eighty (80) structured questionnaires were administered to randomly selected fishermen and people engaged in fish related activities and this was backed up hy the record of HIV cases especially among women at tht Tombo Community Health Centre. Data collected from the interview were treated using measure of central tendency such mean and percentages and results are presented in tables and charts. Respondents age ranged between 15-65 years; sex (fishermen to fish traders) was 71.3% (female) and 28.75% (males) respectively. Marital status of respondents was single, married, divorced, seperated and widowed. Predominant religion of repondents was Islam and Christianity. The study revealed that transactional sex in the study area is mediated by economic structural and environmental factors. The study also revealed that 70.12% of documented HIV cases at the Tombo Community Health Centre were female, while 29.87% were male between the active age of 15-55 years. Fish traders (68.8%) constituted the highest carriers of HIV in the study area.
    Description: Includes: 9 references.
    Keywords: Fisheries ; Sociology ; Nigeria ; Tombo ; Fishing communitu ; Transactional sex ; Socio-economic ; Community health Centre ; freshwater environment ; automation
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    Impact of water hyacinth (Eichhornia crassipes) on fish catch in the lower Taylor Creek area of Bayelsa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24605 | 19325 | 2018-05-21 12:24:48 | 24605 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The aim of the study was to access the impact of water hyacinth, Eichhornia crassipes on fish catch in the lower Taylor Creek area of Bayelsa State. The experimental approach involved the division of the creek into new stations: infested and non-infested at the littoral zone. Subsequently, the deployment of six Malian traps with dimensions of 70cm diameter and 80cm height were set in each station for a period of six months using groudnut cake as bails. Furthermore, fish caught were counted and identified into families and species. From results, fish species composition obtained from the stations were a total of 9 families and 15 species. However, it was observed that the water hyacinth infested area had the lowest fish catch while the non-infestated area had the highest number of fish catch for both dry and wet season. It is therefore concluded that the invasion of Eichhornia crassipes impacted on fish population and composition.
    Description: Includes: 12 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Eichhornia crassipes ; Fish catch ; Taylor creek ; Bayelsa ; freshwater environment ; automation
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    Assessment of heavy metals in water and fish from Ibrahim Adamu Lake, Jigawa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24612 | 19325 | 2018-05-22 05:59:44 | 24612 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to assess the levels of heavy metals in water and the flesh of tilapia (Oreochromis niloticus). Water and tilapia were sampled for a period of 12 months from October, 2003-september 2004. Water and muscle tissue were analysed for Cu, Cr, pb, and Zn using flame atomic absorption spectrophotometer. The assessment showed Cr (3.35mg/l), Cu (0.75mg/l), pb (0.81mg/l) in water while Cr(2.27mg/kg) and pb (0.27mg/kg) were found to be high in the tissue samples and were above the values recommended by WHO and the Food and Agricultural Organization (FAO)of the United Nations and therefore not safe for human consumption.
    Description: Includes: 17 references.
    Keywords: Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Heavy metals ; Oreochromis niloticus ; Atomic absorption ; Spectrophotometer ; freshwater environment ; automation
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    Survey of physical characteristics of the upper reaches of new Calabar River, Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Physico-chemical parameters in relation to fish production of Dadin Kowa Dam, Gombe State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Genetic status of tilapia at Badore landing site using RAPD markers (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24620 | 19325 | 2018-05-22 06:15:41 | 24620 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Molecular technique based on Random Amplified Polymorphic DNA (RAPD) analysis was applied to study genetic status among tilapia species from Badore landing site of Lekki lagoon. Individual variations within species population were assessed using PCR-RAP analysis with five Operon primers (OPC04, OPA02, OPB08, OPE02 and OPF03, Operon Technologies Inc, USA) which revealed dif ferent banding patterns of varying primer reproducibility. Graphical representation using UPGMA cluster analysis produced a dendrogram chart with five clusters (~f, ~e, ~p ,~S, and ~W) indicating different degrees of variations and similarities. There were various levels of genetic similarity observed possibly due to hybridization. Nevertheless, few distinct variations among the samples were visible, show ing possible genetic variability. At 0.89 (89%) coefficient, cluster,~f is made up of 7 samples which are genetically similar. At 0.834 (83.1 %) coefficient, distinct sample BTl2 forms a cluster (~p) with cluster ~f which shows they are related at this coefficient. Cluster ~W (84% coefficient) comprising of 7 samples forms another cluster with a distinct sample BT06 at about 0.79 coefficients. At 78.6% coefficient (cluster ~e). All the samples are genetically similar except sample BT17. This distinct sample can increase genetic variability by a cross between it and other strains of tilapia. Therefore, care should be taken by fish farmers who buy or use the fish samples from this landing site for culture. Proper molecular characterization of this fish species before culture becomes necessary to avoid genetic problems.
    Description: Includes: 17 references.
    Keywords: Biology ; Fisheries ; Nigeria ; Genetic ; Tilapia ; RAPD ; Badore ; freshwater environment ; automation
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    Preliminary investigation of fish species abundance of Otammiri River, Owerri, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24626 | 19325 | 2018-05-22 06:25:03 | 24626 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study of fish species abundance of Otammiri River, Owerri, Nigeria was conducted from April to August, 2012. Four hundred and three (403)fishes belonging to 10 families, 16 genera and 21 species were collected from artisanal fishers using various fishing gears. The fish samples were taken to laboratory, identified, counted and their weights and lengths measured. The unnamed cichlid species ranked highest in percentage number and weight as well as Index of Preponderance (38.7%, 33.6% and 51.1% respectively), while the least were Polycentropis abbreviata, Hepsetus odoe, Synodontis omias, Chrysichthys aluensis and Chrysichthys furcatus each constituting 0.2% of the total number of fish collected. Among fish families, Cichlidae ranked highest in percentage number (82.63%) and weight (81.2%), followed by Hepsetidae (5. 7% and 8.0%) and Anabantidae (4.47% and 2.8% respectively). The least were Characidae, Notopteridae and Mochokidae. The presence of an unnamed fish species in the river is an indication that there could be more unknown aquatic living resources with strong potential benefits to the River. The information provided in this study reflects the potential of the fish resources of Otammiri. This will serve as invaluable baseline tool in fisheries management planning and policy formulations that will enhance the development of fisheries in the area.
    Description: Includes: 15 references.
    Keywords: Ecology ; Fisheries ; Polycentropsis abbreviata ; Hepsetus odoe ; Synodontis omias ; Chrysichthys aluensis ; Chrysichthys furcatus ; Nigeria ; Otammiri River ; Index of preponderance ; Fisheries management ; Otammiri River ; freshwater environment ; automation
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    Fecundity, gonadosomic index and spawning period of Chrysichthys nigrodigitatus of the Lower Cross River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24629 | 19325 | 2018-05-22 06:30:19 | 24629 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The estuarine catfish, Chrysichthys nigrodigitatus, is a prized food fish in Nigeria especially in the Niger Delta region. There is a growing concernrn over the sustainability of the fishery in the face of climate change and environmental variability. Studies were conducted on the fecundity, gonadosomatic index and the spawning period of the species. The objectives were to determine the average fecundity of the species and to use the gonadosomatic index to determine its spawning period with the aim of proffering management advice and prerequisites of the species in the face of climate change. A total of 44 females and 40 males were used for the study which spanned the period from May 2011 to April 2012. The fecundity of the species ranged from 3,730.5 eggs to 41,535.9 eggs. There was correlation between the total fecundity and fish weight (p~,01, r= 0.80, n= 44). The regression model for the relationship was expressed as fecundity = 4660.8+4.76 weight. The gonadosomatic index was highest in the month of May and dropped sharply in june signifying that spawning in Chrysichthys nigrodigitatus starts around this period. The implications of these findings in respect to sustainability of the species, and its aquaculture in the face of climate change are discussed.
    Description: Includes: 14 references.
    Keywords: Fisheries ; Atmospheric Sciences ; Chrysichythys nigrodigitatus ; Nigeria ; Lower Cross River ; C. nigrodigitatus ; Reproduction ; Climate change ; Cross Rivber ; Sustainability ; freshwater environment ; automation
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    Fish processing technologies in Eti-Osa Local Government Area of Lagos State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24671 | 19325 | 2018-05-23 07:46:56 | 24671 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Traditional fish processing technologies vary widely in terms of equipment type, size and processing efficiency in Nigeria's coastal states. This study was carried out to identify fish processing technologies and evaluate the effectiveness, energy sources and efficiency of fish smoking equipment in use in the study area. Data were collected using structured questionnaire administered between January and March, 2011 in seven fishing villages along the coastline in the lbeju-Lekki LGA, Nigeria. Major fish species being processed were identified; and the profitability of the post harvest technologies adopted was evaluated. A total of five traditional fish processing equipment were observed; and included galvanized iron sheet supported by planks 51 (46.4%); drum oven 8 (7.2%); black clay oven 24 (21.8%); red clay oven 9 (8.1%); brick kiln 5 (4.2%) and government model kiln 4 (3.5%). Generally, energy sources were fuel wood and charcoal for traditional fish processing equipment; and electricity for the government model kiln. Majority of traditional fish processors were peasant women; and three types of processing technologies were observed, including air drying (1.0%), hot smoking 169.1%); and salting and smoking (29.9%). The capacity of kilns and ovens observed ranged from 20 to 50kg daily with a price range of Nl0,000 to N50,000. Factors considered before replacement of smoking equipment by the processors were equipment ruggedness, cost and production capacity. Women's involvement in traditional fish processing was 95%; and major fish species in the value chain included Ethmalosa fimbriata, Caranx senegallus, Sardinella maderensis,Drepane africana, Cynoglossus monodis, Pseudotolithus megalensis, P. typus, Arius latiscutatus and A. mercatoris. It was observed that products of traditional fish processing industry were readily acceptable to consumers and commanded marginal market prices with optimal economic benefits to processors.
    Description: Includes: 25 references.
    Keywords: Fisheries ; Nigeria ; Fish value chain ; Coastline ; Processors ; Women ; Traditional fish processing equipment ; freshwater environment ; automation
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    Fisher folk's response to climate change in New Bussa and its environs of Kainji Lake Basin, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24661 | 19325 | 2018-05-27 14:57:38 | 24661 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study examined fisher folk responses to climate change in Kainji lake basin. The sample comprises of fisher folks within and New Bussa. Eighty questionnaires were administered to obtain the primary data and analysed using descriptive and inferential statistical tools. The results revealed that majority (70%) of the respondent were male, however (61.2%) of them had tertiary education. Majority (60%) of the respondents were aware of changes in climate in the area. Majority (65%) and (55%) of the respondents were involved in incidence of deforestation and charcoal production respectively. In conclusion, it was discovered that little knowledge about climate change and its effects were found among fisher folk. Therefore it recommends that sensitization workshops/lectures be done to enable the fisher folk have adequate knowledge on climate change and the implications on fisheries activities in the basin.
    Description: includes: 11 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Climate change ; Fisher folk ; Fishing community ; Awareness ; freshwater environment ; automation
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    Public relations and extension services in Nigerian fisheries industry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24663 | 19325 | 2018-05-27 14:59:47 | 24663 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The paper discussed the importance of fish as a food commodity and the rich icthyofauna resources of Nigerian territorial which has not been optimally utilized to be sustainable. Among the challenges facing the fisheries subsector of Nigerian economomy apart from overfishing, poor post-harvest technology and high incidence of sea piracy is poor level of communications, public relations, restricted access to extension services especially to the rural artisanal fisherfolks/fish farmers in Nigeria . This has been identified as contributory to the increasing shortfall between demand and supply of fish in Nigeria. There is a need/or a good public image fisheries concerns. Production and marketing personnel need to respect the wishes of the consumers and have good interpersonal relationships. Communication should be a 2-way affair between the extension officers and the fisherfolks in the rural communities to be achieved. The various media that could aid better dissemination in the Fisheries subsector were highlighted. The author recommended better funding, training of extensionists and target audience, improved public sensitization of rural practitioners to fish output. There is a need for a more productive and result-oriented reform in Nigerian extension system. A unified extension is also recommended for effective extension education from the stage of production, handling, processing, transport and retailing. More conducive enabling environment should be created by the government.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Nigeria ; Public relation ; Communication ; Funding ; Extensionists ; Fisherfolks ; freshwater environment ; automation
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    Comparative nutritional composition of smoked catfish (Clarias gariepinus) produced from NIOMR smoking kiln and local cut-drum oven (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24668 | 19325 | 2018-05-23 07:52:49 | 24668 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of two different preservative equipment-the NIOMR (Nigerian Institute for Oceanography and Marine Research) kiln and local cut-drum oven-on crude protein, minerals and vitamins of C. gariepinus were studied. The fish were obtained from Africa Regional Aquaculture Centre, Aluu, Port Harcourt. Moisture, crude protein, crude fibre, crude fat and ash content were determined using standard methods. There were significant differences (P〈0.05) in the moisture and crude fiber content. The moisture content of the fish sample ranged from 2.18 to 5.98, this could be attributed to the drying methods. The crude fibre content ranged from 2.78 and shows no significant difference. The ash content of the samples ranged from 0.25- 0.6%, an indication that smoking reduces the ash content of fish. Result of the crude protein of fresh fish was 21.84 ~c 1.10 which increased to 59.53 ~c 1.88 and 35.41 ~c1.00 in NIOMR smoking kiln and local oven respectively. This means that, there was a significant different in the effects of the two dryers on crude protein. The vitamin content of both ovens showed no significant difference except in vitamin A which was significant in the fish dried with smoking kiln. There was significant different (p〈0.05) in the mineral content of the two drying equipment, this was in Sodium, Potassium and Phosphorus level of fish smoked with NIOMR smoking kiln. This result indicates that the two drying methods have varying effects on the nutritional quality of catfish, which is in favour of NIOMR kiln.
    Description: Includes: 8 references.
    Keywords: Fisheries ; Nigeria ; Smoking ; Production ; Preservative research ; Quality ; freshwater environment ; automation
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    Development of 2.14 M one sheet canoe (SAMPAN) for pond activities (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23416 | 19325 | 2018-04-25 19:13:12 | 23416 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 2.14 M length overall (LOA) flat bottom modern canoe (Sampan), was designed and constructed using locally available materials. The canoe features include easy construction, portability, least cost, light weight, shallow draft, and easy maneuverability. The light displacement (weight empty) was 25kg, which was less than local canoe of same size. When placed on water a draft of 5.5cm. The capacity of the canoe was 200kg, and the total production cost of N10, 000.00, ($67) which was not beyond the reach of an average fisher folks, or any fish farmer. The canoe was easily maneuvered when propelled by paddling as it floated at a shallow draft; this makes the canoe adequate for use on shallow water bodies such as ponds and reservoirs. The craft, because of its easy maneuverability, can also be used on shallow water bodies for recreational activities such as, sport fishing and canoeing.
    Description: Includes:-3 tables.;2 figs.;2 plates.;6 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; New Bussa ; freshwater environment ; Canoes ; Artisanal fishing ; Surface craft ; Boats ; Design ; Construction
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    A prelimnary study of diet in the juvenile gorean snapper, Lutjanus goreensis (Valenciennes, 1830) from Five Cowrie Creek, Lagos, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23453 | 19325 | 2018-05-04 17:40:12 | 23453 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Diet of the juvenile Gorean snapper, Lutjanus goreensis from Five Cowrie Creek was investigated between April 2008 and January 2009. Analyses of 184 specimens by numerical (NO), frequency of occurrence (FO) and geometric index of importance (GII) methods, respectively revealed a moderately high proportion (47.83%) of stomachs with food or prey. Shrimps and crabs constituted more than 80 % of total prey items. Other dietary components included lobsters, stomatopods, whole fish and fish parts. Similarly, analysis of diet composition by size - groups also indicated a predominance of the shrimps and crabs over all other prey items. In conclusion, L. goreensis can be described as a top-level carnivore feeding almost exclusively on epibenthic crustaceans in the juvenile stage.
    Description: Includes:- 2 tables.;21 refs.
    Keywords: Ecology ; Fisheries ; Lutjanus goreensis ; Nigeria ; Lagos Greek ; brackishwater environment ; Diets ; Stomach content ; Feeding behaviour
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    The fin fish assembage of Ikere Gorge, Oyo State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23459 | 19325 | 2018-05-05 12:28:56 | 23459 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The fin fish assemblage of Ikere gorge was investigated. The fin fishes comprised a total of 34 species belonging to 13 families. Chrysicthys nigrodigitatus was most abundant and highest in biomass (69,198.33 kg) accounting for 34.65% of the catch. Synodontis nigrita, Malapterurus electricus, Marcusenius psittacus Gnathonemus sensgalensis and Gnathonemus cyprinoides were the least in number, while Phago loricatus was least in biomass (20.00 kg) accounting for 0.01%.The major aim was to assess the fish resources of the gorge and evaluate the water parameters as related to fish production. No significant difference was observed in dissolved oxygen, nitrate, phosphate, water temperature, conductivity, alkalinity, total dissolved solid and pH range value in the stations. The water quality parameters were favourable for fish production. Water level and temperature were observed to guarantee high fish yield in the gorge.
    Description: Includes:- 2 tables.;16 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Ikere Gorge ; freshwater environment ; Check lists ; Population dynamics ; Physicochemical properties ; Chemical properties
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    Fish species composition in Lake Kivu, Rwanda, East Africa (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23462 | 19325 | 2018-05-05 12:34:34 | 23462 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An assessment of the fish species composition in Lake Kivu Rwanda, East Africa was carried out between February 2005 and December 2006. Fish samples and statistics of average daily catches were collected from the organized fishermen cooperatives societies in Gisenyi, Kibuye and Cyangugu. Fish samples were identified on the basis of existing photographs and standard identification keys. Ten (10) fish species belonging to four families (Clupeidae, Cyprinidae, Clariidae and Cichlidae) were identified with Limnothrisa miodon (57.1%), Haplochromis spp. (17.1%), Tilapia rendalli (9.9%) and Oreochromis niloticus (9.5%) being the dominant ones.
    Description: Includes:- 2 tables.;4 figs.;17 refs.
    Keywords: Fisheries ; Rwanda ; Kivu L. ; freshwater environment ; Check lists ; Population dynamics ; Stock assessment
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    An evaluation of ichthyo-fauna composition of Oramiri-Ukwa River, Imo State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23465 | 19325 | 2018-05-05 12:40:39 | 23465 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An aspect of artisanal fisheries of Oramiri-Ukwa River was studied for 6 months from January to June 2008, to get the base-line information on the artisanal fisheries of Oramiri-Ukwa River and appraise the Ichthyo-fauna of the river and their monthly distribution. Data collected was subjected to Simpson’s index, Shannon-Weiner index and Marglefs’ index analysis. The Ichthyofauna community was composed of 30 species representing 16 families with Cichlidae having the highest number of species. Nineteen (19) species were present in both wet and dry season. Wet season recorded more species than Dry season with 52.1% and 47.9% respectively. General diversity value of 0.856 (dry) and 0.672 (wet) was observed. Key words: Ichthyo-fauna, Oramiri-Ukwa, composition
    Description: Includes:- 2 tables.;2 figs.;12 refs.
    Keywords: Fisheries ; Nigeria ; Oramiri-Ukwa R. ; freshwater environment ; Check lists ; Species diversity ; Stock assessment ; Population dynamics ; Ichthyology ; Fauna
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    Assessment of the fish consumption pattern of Njala-Mokonde community residents, Moyanba District, Sierra Leone (2021)
    Fisheries Society of nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23481 | 19325 | 2018-05-06 12:41:03 | 23481 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Information on the fish consumption pattern of the residents of Njala community, Moyanba district, Sierra Leone is rare. Njala is a University community closely annexed by Mokonde village. This study was carried out using structured questionnaires to investigate the fish consumption pattern of the people of the community. The questionnaires were delivered by hand to randomly selected members of the community. 90 respondents comprising 40 males and 50 females were sampled. The respondents composed of 22.2% academics, 8.89% farmers, 14.4% sales persons, 2.22% bank workers, 1.11% police staff, 33.3% dependents, and 1.11% civil servants. 16.7% of the respondents did not indicate their work category. The ages of respondents were between 10 ? 70 years. The results generated showed that 98.9% of the respondents eat one type of fish or the other while 1.11% does not eat fish. Average money spent by respondents ranged from Le 2000 ? Le 10,000. However 48.9% of the respondents spend more than Le 10,000 weekly. Consumption pattern seems to be proportional to income of respondents. Poverty and starvation is pronounced in the study area and this probably accounted for the low consumption of protein-based food especially fish. Keywords: Fish consumption, Respondents, Njala, Mokonde, Sierra Leone.
    Description: Includes:- 2 tables.;2 figs.;14 plates.;6 refs.
    Keywords: Fisheries ; Sierra Leone ; freshwater environment ; Fish consumption
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    Preliminary evaluation of a new fishing pot trap in Lake Kainji, Nigeria (2021)
    Fisheries Society of nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23487 | 19325 | 2018-05-06 12:55:39 | 23487 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Based on personal working relationship with artisan fishers in the southern portion of Lake Kainji, North Western Nigeria, a new fishing pot trap made with polyvinyl chloride pipe material was designed, fabricated and its performance evaluated by comparison with the traditional Malian trap. The aim was to have a fishing pot trap that is long-lasting and be at least as effective as the Malian trap in fish catch. The results of the study revealed the advantages and limitations in the design and mode of operation of each of the trap type and recommended areas of improvement. Data collected on fish diversity, number and weight were subjected to descriptive statistics and Student’s t-test. The results showed that nineteen fish species belonging to ten families were caught. While the same species density index (SDI) of 0.84 was recorded for both traps, there was no significant difference (P〉0.05) in the catch by number and weight of the two traps.
    Description: Includes:- 3 tables.;3 figs.;14 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fishing gear ; Pots ; Gear construction ; Gear research ; Catching methods ; Pot fishing
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    Microflora associated with processing and storage of the white catfish (Chrysichthys nigrodigitatus) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23488 | 19325 | 2018-05-06 12:56:50 | 23488 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Quality deterioration (microbial load) of smoked white catfish (Chrysichthys nigrodigitatus) from Ekeonunwa market Imo state Nigeria, was studied for six weeks. The experimental fish was divided into two batches. One batch of 18 fishes with average weight of 700g was resmoked weekly at 75oC. the second batch of 18 fishes weighing an average of 750g was left unresmoked. Weekly samples of both unresmoked and resmoked fish were taken from different regions (body flanks, gill and gut) and analyzed in the laboratory. Total plate counts (TPC) for the bacterial organisms in both resmoked and unresmoked samples (Table III) ranging between 1.56 105 and TNTC ( too numereous to count) exceeded the range of specified microbiological limits recommended for fish and fishery products by ICMSF (1986). Pathogenic organisms isolated included Escherichia coli, Staphylococcus aureus, Lysteria monocytogenes, Bacillus cereus, Aspergillus flavus, Penicillium varrucossum, Yeast and Mucor. Both unresmoked and resmoked fish specimens were contaminated with these spoilage microbes, but the microbial load of the resmoked samples were less than those of the unresmoked samples. Resmoking beneficially reduces microbial load of stored fish, increases the shelf/storage life, but can not totally eliminate pathogens. The presence of pathogens raises a public health concern.
    Description: Includes:- 3 tables.;1 fig.;10 refs.
    Keywords: Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Imo State ; freshwater environment ; Processing fishery products ; Curing ; Microbial contamination ; Microorganisms ; Infestation ; Fish storage
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    Public perception of mudskipper consumption in some fishing communities of River State (2021)
    Fisheries Society of nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23485 | 19325 | 2018-05-06 12:49:11 | 23485 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Mudskippers are a delicacy in some fishing communities of Rivers State, public perception of mudskipper consumption were determined in these areas. 120 structured questionnaires were randomly distributed in ten communities spread across three local governments. The results of the survey showed that consumption of mudskipper was more popular among the old people than the younger ones. A greater number of people 82.50% considered mudskipper as fish, 10% as nuisance, 4.17% as snake and 3.32% as pest. Also, 83.33% of the respondents were favourably disposed towards mudskipper 15.0% were negative and 1.67% were indifferent. The study revealed that there is no taboo in the consumption of mudskipper in these area, any perceptions was observed personal to individual and not a communal affair.
    Description: Includes:- 5 tables.;9 refs.
    Keywords: Fisheries ; Nigeria ; Rivers State ; Taboo ; Mudskipper ; freshwater environment ; Fish consumption
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    Evaluation of trunk as the most fleshy region of some fish species from the Warri River, Delta State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23492 | 19325 | 2018-05-06 13:03:31 | 23492 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Major sections (head, trunk and tail) of six fish species from the Warri River were measured in order to determine which was the largest and most fleshy. Besides Ethmalosa fimbriata (37.31%) the trunk length was over 40% of the standard length in the fish species. Based on the length and breadth the trunk was larger than the tail and head in all species and could be the bulkiest and most fleshy region. The sequence of the trunk surface area was Brycinus macrolepidotus 〉 B.nurse 〉 Pellonula leonensis 〉 Liza grandisquamis 〉 Mugil cephalus 〉 Ethmalosa fimbriata.
    Description: includes:- 7 tables.;9 refs.
    Keywords: Fisheries ; Nigeria ; Warri R. ; freshwater environment ; Morphometry ; Dimensions
    Repository Name: AquaDocs
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    Effects of some plant extracts on some biological parameters of catfish Clarias gariepinus (Burchell 1822) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23493 | 19325 | 2018-05-06 13:04:49 | 23493 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Preliminary studies on the antimicrobial properties of various methods of extraction of Carica papaya (Pawpaw) seeds, Citrus paradisa (Grapefruit peel) and Piper guineese (Black pepper) seeds against eleven bacteria ( Proteus mirabilis, Escherichia coli, Staphylococcus aureus, Acinetobacter sp, Klebsiella pneumoniae, K. oxytoca, Pseudomonas lundensis, Bacillus subtilis, B. megaterium, Citrobacter freundii and Enterobacter cloacae) associated with fresh catfish spoilage were investigated using the cup-plate diffusion method. Cold water, hot water and ethanol were the different extraction solvents used while the concentrations were 0.1g/ml, 0.2g/ml, 0.3g/ml, 0.4g/ml and 0.5g/ml. Generally, hot water extraction of the plant materials was most effective (p 〈 0.01) with the highest mean zone of inhibition of 4.42 ~c 0.38mm followed by ethanol extraction (3.55 ~c 0.47mm). The most susceptible bacteria was Enterobacter cloacae with the highest mean zone of inhibition of 22.6 ~c 3.50mm. This investigation indicates that the antimicrobial compounds in grape peel and black pepper are best liberated when extracted with ethanol while that of pawpaw is best extracted with hot water.
    Description: Includes: 2 tables.;7 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Chemical extraction ; Preservatives ; Plant utilization ; Aquatic plants
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    Value addition for snacks using fish (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23494 | 19325 | 2018-05-06 13:07:24 | 23494 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper highlights recipes for the production of snacks using finfish and shellfish such as cockles, oysters and pelagic fish in the production of fish yam/sweet potato balls; fish roll or fish pie; cockle and oyster barbecue. In the production of these snacks, the quality and quantity of fish required is adequately provided. Each snack contained minced fish, a source of essential nutrients in good nutrition. The snacks were subjected to organoleptic assessment by a group of five panelists. Highest preference was given to fish sweet potato balls, rated 9, followed by oyster and cockle barbecue rated 8.6 on a 9-point scale. This is because cockle and oyster meat are fleshy and tasty. Production of these snacks is a way of introducing high protein variety to the family menu. Prices of the production of snacks were calculated and results showed that they are cheap and easily affordable. Conclusively, these snacks are easy to make and could be widely accepted. The overall concept of making these snacks was to introduce a wide range of foods produced using fish to add value to our daily nutrition.
    Description: Includes:- 3 tables.;4 figs.;12 refs.
    Keywords: Fisheries ; Nigeria ; Port Harcourt ; Fish Snacks ; freshwater environment ; Minced products ; Processed fishery products
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  • 84
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    Comparison of keeping qualities of Alestes nurse displayed in traditional and improved retail tables (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23496 | 19325 | 2018-05-07 12:15:56 | 23496 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study accessed the quality changes of Alestes nurse displayed at 31-33oC average daily temperature on different platforms, the traditional retail table used by fish processors and the NIFFR improved retail table. The fishes were displayed on the tables for 9 hours and quality attributes were monitored hourly by trained panelists. For A. nurse, the gills and intestine recorded faster deterioration starting from the fourth and fifth hours for samples in the traditional table while those in improved table were prolonged by one hour. Scores for skin brightness and texture did not indicate quality deterioration throughout the display period. However, at the end of the storage time, samples in screened table recorded 1.5 x 104 cfu/g while samples in unscreened table recorded 3.7 x 107 cfu/g. The study shows the effectiveness of the improved table over the traditional table in enhancing the keeping quality, minimizing fish contamination and improving the general hygiene of fresh fish.
    Description: Includes:- 3 tables.;2 figs.;7 refs.
    Keywords: Fisheries ; Health ; Alestes nurse ; Nigeria ; New Bussa ; freshwater environment ; Fish handling ; Hygiene ; Public health
    Repository Name: AquaDocs
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  • 85
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    Body characteristics, yield indices and proximate composition of horse eye mackerel fish (Caranax carangus) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23455 | 19325 | 2018-05-04 17:42:49 | 23455 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Size measurements, anatomical composition and proximate composition of Horse eye mackerel fish (Caranax carangus) were carried out. The mean values of length (cm) and weight (g) were 21.79~c 1.76 and 87.96 ~c 21.4 respectively. Anatomical fractionation showed that the fish samples contained on the average 45.8% fillet, 17.75% head, 25.98% body frame and 6.12% gut. The proximate composition analysis showed that the fish sample contained 77.2% water content, 0.4% lipid, 20.63% protein and 1.67% ash. Horse eye mackerel fish thus constitutes a source of high protein as well as an ideal dietetic fish food.
    Description: Includes:- 2table.;1 figs.;11 refs.
    Keywords: Ecology ; Fisheries ; Caranax carangus ; Nigeria ; Lagos ; Proximate composition ; freshwater environment ; Length-weight relationships ; Chemical composition
    Repository Name: AquaDocs
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  • 86
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    Aspects of reproductive biology of Hyperopisus bebe occidentalis (Gunther) in Zaria Dam, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23457 | 19325 | 2018-05-04 17:47:03 | 23457 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Studies were conducted on some aspects of the reproductive biology of Hyperopisus bebe occidentalis in Zaria dam. Fish were captured by using nets of various mesh sizes for 24 months. Sex ratio of female to male was 1:1.08. Fully matured gonads were observed from July to October (rainy season). Fish with spent gonads were found from December to February, virgin or immature gonads (stage I and II) were found in February to May, with the peak in March in female fish and January in male. The estimated fecundity ranged from 2025 to 4192 eggs per female with mean of 2822.4 ~c SD 781.43 eggs that had standard length range of 24.20cm to 35.50cm. The gonadosomatic index (GSI) ranged from 1.63% to 3.31%. There was a significant correlation (r = 0.873, p〉0.05) between the weight of the fish and fecundity and insignificant correlation (r=0.497, p〈0.05) between the standard length and fecundity.
    Description: Includes:- 1 table.;2 figs.;19 refs.
    Keywords: Fisheries ; Hyperopisus bebe occidentalis ; Nigeria ; Zaria Dam ; freshwater environment ; Reproduction ; Reproductive behaviour ; Reproductive cycle ; Fecundity ; Gonadosomatic index ; Sex ratio
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    A survey of fish fauna in Lake Kainji, New Bussa, Niger State (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23454 | 19325 | 2018-05-04 17:41:21 | 23454 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The survey of the fish fauna in Lake Kainji, Niger State and Kebbi state was carried out for a period of three months from August to October 2003 using fishermen’s catches. Forty two species of fish were identified and these were from the families Osteoglossidae, Gymnarchidae, Mormyridae, Characidae, Citharinidae, Distichodontidae, Cyprinidae Bagridae, Schilbeidae, Clariidae, Malapteruridae, Mochokidae, Channidae, Centropomidae, Cichlidae and Clupeidae. In terms of relative abundance, the family Bagridae has the highest species diversity of 20%, while Osteoglossidae, Citharinidae, Malapteruridae, Mochokidae, Centropomidae and Gymnarcidae had lowest species diversity of 2.5%.The study provides a biogenic history of fish species diversity within this period of the year in the last two decades. The significance of the study is to provide information towards a sustainable exploitation strategy in the community based management of the fisheries of the lake.
    Description: Includes:- 3 figs.;14 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fauna ; Population dynamics ; Check lists
    Repository Name: AquaDocs
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    Hybridization and speciation among cichlids: the case of 'Wesafu', an ecotype cichlid (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23469 | 19325 | 2018-05-05 12:49:04 | 23469 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Fishes of the family Cichlidae are known for spectacular adaptive radiation and therefore serve as a model for evolutionary and ecological studies. They are highly speciated due to hybridization that frequently occur in the wild. The existence of an ecotype cichlid, ’wesafu’ in Epe Lagoon, Lagos, Nigeria appears to be the result of such hybridization. This paper reviews the profile of wesafu and compare the species with other cichlids, evaluate the probable causes of speciation which includes diversity in feeding morphology, mate choice, adaptation to changes in habitat arising from water level dynamics , eco-phenotypic variation, restricted migration to predation and introgressive hybridization. The implication of such speciation and hybridization were also highlighted.
    Description: includes:- 2 tables.;24 refs.
    Keywords: Fisheries ; Nigeria ; Epe Lagoon ; marine environment ; Hybridization ; Biological speciation ; Species diversity
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    Socio-economic status of the fisherfolk of Yuna Adopted Village in Borgu Local Government Area, Niger State (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23474 | 19325 | 2018-05-05 12:58:18 | 23474 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study was conducted to assess the socio-economic status of fisherfolks in Yuna Adopted Village Borgu Local Government Area of Niger State. One hundred respondents (65 male and 35 female) were purposively selected from four registered groups in the Village. Frequencies and Percentages were used to arrange, summarize and present the findings of this study. Majority of the male respondents fell within the range of 30-49 years, while female respondents range from 40-49 and 60-69 years. The distribution of respondents based on educational attainment shows that 92.3% male and 100% female had Quranic education. Majority of the respondents (both male and female) lives in mud with thatched roof houses and do not own radio and television. Similarly the highest proportion of male respondents generated mostly income of 〉N111,000 and N6,000 ? N10,000, while female respondents earned between N11,000 ? N30,000 and N6,000 ? N10,000 only. The technologies awareness by respondents include fish farming, V-bottom boat, Solar tent dryer and trammel net, only fish farming was adopted by respondents. The major constraints to Agricultural Production were identified and suggestion was made on how to overcome the constraints.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Yuna ; Fisherfolk ; Fishery Extention Services ; Extension Services ; freshwater environment ; Socioeconomic aspects ; Technology transfer ; Technology ; Fishermen ; Women
    Repository Name: AquaDocs
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    Effect of rainfall pattern on fish production in Ogun State, Nigeria (2021)
    Fisheries Society of nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23483 | 19325 | 2018-05-06 12:46:02 | 23483 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The role of water in fish production could not be overemphasized. This is because water is required for the total functioning of fishes. This study therefore examined the relationship/effect of rainfall pattern on fish production. Secondary data were collected on mean annual rainfall and total annual fish output for the period of 10 years (2000-2009). The study showed that high rainfall was recorded in the year 2001 which marked the lowest fish production year due to floods effect on fish enclosures. These therefore implies that fish farmers should be encouraged to construct ponds with protective measures such as screens, dykes, freeboards, etc. which prevents total loss of stocks during heavy rainfall.
    Description: Includes:- 2 tables.;5 figs.;13 refs.
    Keywords: Fisheries ; Nigeria ; Ogun State ; Climate effects ; freshwater environment ; Rainfall ; Fishery development ; Climatic changes
    Repository Name: AquaDocs
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  • 91
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    Bio-economic assessment of a purse seining at Orimedu fishing settlement off Lekki, Lagos State (2021)
    Fisheries Society of nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23484 | 19325 | 2018-05-06 12:47:40 | 23484 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A bio- economic assessment based on the Return On Investment (ROI) of a single purse seiner was done from August 2007 to February 2008 at Orimedu. Catch composition in terms of relative abundance of species and their sizes were also assessed. Total income was derived from the product of average selling price for a basin of fish, average number of fish basins sampled from a purse seiner, number of fishing trips of a purse seiner per month and the total number of months. Total costs were derived from the sum of capital costs, operational costs, depreciation costs, maintenance cost and labor cost which was estimated as 1/3 rd of total income. Fish catch was dominated by mature fish consisting of over 90 % clupeids and measured in heaps of 200 pieces in basins. On the average, there were 17 basins of fish from a purse seiner. Each basin was valued at N8000 and the average number of fishing trips in a month was 9. The calculated ROI was 30.96% indicating that the fishing method was lucrative. The study showed that purse seining is both biologically and economically sustainable with great potentials to alleviate poverty if adopted by the local Nigerian fisherfolks.
    Description: Includes:- 2 tables.;5 refs.
    Keywords: Fisheries ; Management ; ASE ; Nigeria Coast ; marine environment ; Economic analysis ; Fishery economics ; Capture fishery economics ; Financial management ; Investments ; Costs ; Catch composition ; Seiners
    Repository Name: AquaDocs
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    Development of 4.78M LOA fishing boat (punt) for artisanal fishery (2021)
    Fisheries Society of nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23482 | 19325 | 2018-05-06 12:44:32 | 23482 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 4.78 M length overall (LOA) flat bottom modern fishing boat (punt), was designed and constructed using locally available materials. The boat features include easy construction, stability, and high capacity to carry load. Other features include: least cost, light weight, shallow draft, and easy maneuverability. The light displacement (weight empty) was 202.24kg, which was lighter than a local boats of same size. When placed on water a draft of 5cm. The capacity of the boat was 715kg (11 prs), and the total production cost of N39,000.00, which was not beyond the reach of an average fisher folks, or fish farmer. The punt can easily be maneuvered when propelled with 5hp out board engine as it floats at a shallow draft (10cm); this makes it adequate for fishing activities on shallow water bodies. The craft, because of its easy maneuverability, can also be used on shallow water bodies for recreational activities such as, sport fishing.
    Description: Includes:- 2 tables.;2 figs.;4 plates.;8 refs.
    Keywords: Fisheries ; Nigeria ; New Bussa ; Boat design ; Boat construction ; freshwater environment ; Surface craft ; Boats ; Design ; Construction
    Repository Name: AquaDocs
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    Chemical and biological assessment of Chrysichthys furcatus from River Niger at Cable-point, Asaba (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23489 | 19325 | 2018-05-06 12:58:47 | 23489 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Bacteria flora predominates the skin of freshly caught fish, and will invade the tissue of the fish immediately after catch. Two preservative methods (cold smoking and freezing) were used to store eighteen specimens of Chrysichthys furcatus harvested from River Niger at Cable-point, Asaba. Two specimens were randomly selected every day from the cold smoked specimens and on weekly basis from the frozen specimens for physical, chemical and biological examination for bacteria causing spoilage. Five bacteria isolates: Salmonella spp, Vibrio cholera, Escherichia coli, Staphylococcus aureus and Proteus vulgaris, were identified. Physical observation of the cold smoked fish after 24 hours showed the production of gas, off-odor, off flavour and slime formation. The colony forming units (CFU) of bacteria isolated from the fish immediately after harvest was 116 x 109 cfu/g. It increased to 268 x 109 cfu/g after 4 days of preservation, and to 64 x 109 cfu/g after four weeks of preservation. The Chi square (X2) analysis revealed that there was a significant difference between the bacteria load of frozen and cold smoked specimens. Free fatty acid value immediately after harvest was 0.90 %. It increased to 2.24 % after four weeks in the freezer and 2.35 % after four days of cold smoked storage. The Total Volatile Nitrogen profile at harvest time was 15.3 mgN/100g. It increased to 35.2 mgN/100g after four days, (for the cold smoked specimens) and 26.3 mgN/100g (for the frozen specimens) after four weeks. The peroxide and hydrogen ion concentrations followed the same increasing trend. The study revealed that freezer preservation was better than the cold smoked one. This is because bacteria proliferation was reduced and or halted in the frozen specimens, whereas it encouraged rapid bacteria growth in the cold smoked fish. The production of total volatile nitrogen (TVN), free fatty acid (FFA), peroxide value (PV) and hydrogen ion concentration (pH) was higher in the cold smoked specimens than in frozen ones, hence the cold smoked specimen exhibited shorter shelf life than their frozen specimens.
    Description: Includes:- 4 tables.;15 refs.
    Keywords: Fisheries ; Chrysichthys furcatus ; Nigeria ; Niger R. ; freshwater environment ; Infestation ; Fish storage ; Microbial contamination ; Chemical degradation ; Chemical reactions ; Biological damage ; Damage ; Processing fishery products
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    Comparative study of proximate composition of some wild tilapiine fishes in Epe Lagoon, Lagos, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23499 | 19325 | 2018-05-07 12:20:18 | 23499 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The proximate composition of some wild tilapiine fishes in Epe lagoon, Lagos, Nigeria was analyzed. The species were Sarotherodon melanotheron, Tilapia guineensis, Tilapia mariaei, Sarotherodon galileaus and an ecotype cichlid popularly called ‘wesafu’. Major nutrient compositions of raw muscles like protein, fat, moisture and ash were determined. Proximate compositions were found to be varied among the species. Protein was determined in Sarotherodon melanotheron (19.13%), T. guineensis (18.71%), T. mariae (18.08%), S. galileaus (18.34%) and ‘wesafu’ (21.80%) respectively. Lipid content was recorded as 0.82%, 0.40%, 0.60%, 0.65%, and 0.90% for the tilapia species. The highest level of moisture content was found in T. guineensis (81.70%) and the lowest was in ‘wesafu’ (78.50%). The percentage of ash content was highest in S. galileaus and S.melanotheron (1.75%) and lowest in T. guineensis (1.00%). The present study revealed highest protein content in the ecotype cichlid, wesafu (19.22%) and lowest value in T.mariae (18.08%) while fat was highest in ‘wesafu’ (0.90%). The results of this study reveal the nutritional significance of the ecotype cichlid, ‘wesafu’ above other cichlids of the lagoon.
    Description: Includes:- 1 table.;11 refs.
    Keywords: Fisheries ; Nigeria ; Epe Lagoon ; Proximate composition ; freshwater environment ; Ash content ; Proteins ; Organic compounds ; Body conditions ; Nutritional requirements
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    Proximate composition of Pseudotolithus elongatus subjected to different processing techniques (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23497 | 19325 | 2018-05-07 12:17:33 | 23497 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The changes that occur on proximate composition of some common fish processing methods used in Nigeria were studied in order to determine the nutritional content of the processed products. Traditional (smoke drying and sun drying) and modern (electrical oven drying) methods of processing were used to process Pseudotholithus elongatus and the results were compared with the fresh sample to determine the changes that occur during processing. The results for the fresh sample of P. elongatus were 79.50%, 1.50%, 0.8% and 18.2% for moisture, ash, lipid and protein. For the processed products, the moisture content for smoke-dried, sun-dried, salt sun-dried and oven-dried fish were 27.00%, 21.83%, 19.50% and 20.17% . Oven dried had the highest protein content (69.87%) while salt sun-dried had the lowest (54.90%). Lipid content was highest in sun-dried (6.6%) and lowest in smoke-dried (4.6%). Correlation between smoke-dried and sun-dried were r2 = 0.99, smoke-dried and oven-dried were r2= 0.98 and smoke-dried and salt sun-dried were r2= 0.98. There was no correlation between the fresh and the processed P.elongatus. The present findings revealed that processing affect the nutritional composition of fish.
    Description: Includes:- 1 table.;22 refs.
    Keywords: Fisheries ; Health ; Pseudotolithus elongatus ; Nigeria Lagos ; Proximate composition ; freshwater environment ; Processing fishery products ; Moisture ; Proteins ; Chemical analysis ; Lipids
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    Preliminary study on the antioxidative and antimicrobial effects of fresh garlic (Allium sativum) on the shelf life of hot smoked catfish (Clarias gariepinus) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23495 | 19325 | 2018-05-07 12:13:48 | 23495 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effects of fresh garlic (Allium sativum) at concentrations of 0 g/kg (control), 10 g/kg, 30 g/kg and 50 g/kg of fish on lipid oxidation and microbial growth of hot smoked catfish Clarias gariepinus during a 28 day storage period at ambient temperature of 20-260C was examined. The samples were subjected to chemical and microbial analyses during the storage period. The results of analyses suggest that fresh garlic possesses antioxidant and antimicrobial properties, which can extend the shelf life of Clarias gariepinus.
    Description: Includes:- 1 table.;2 figs.;6 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Garlic ; freshwater environment ; Chemical analysis ; Chemical composition ; Microbiological analysis ; Processing fishery products ; Preservatives ; Fish storage ; Storage conditions ; Storage effects ; Storage life ; Shellfish
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    Comparative studies of groundnut oil and sodium chloride as protectants against insect infestation of smoked dried fish in Kainji Lake areas (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23490 | 19325 | 2018-05-06 13:00:41 | 23490 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effects of groundnut oil and sodium chloride as protectants against insect infestation of dried fish were investigated for a period of 13 weeks. The fish samples were divided into 3 groups, a group was soaked for 10mins in 30% sodium chloride solution (Brine), and the second group was dipped in groundnut oil after smoking while the third group served as control. The samples were kept in different containers in the laboratory at temperature of 28oC and 70% Relative humidity for 13 weeks. Results show that, the fish treated with 30% sodium chloride was effectively protected from insect and moulds compared to sample treated with groundnut oil. The odour and the texture were also more attractive to customers. However, fish treated with groundnut oil was attacked by insects at week 12th and 13th with 6 Maculatus, 4 Necrobia rufipes species and at few mould colonies. The control specimens however was attacked by insects from week 8th to 13th with numerous number of both Necrobia rufipes and Maculatus species as well as mould colonies showing as early as from the 6th week. The results proved that sodium chloride is more effective than groundnut oil for long period of storage.
    Description: Includes:- 5 tables.;5 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; Groundnut oil ; freshwater environment ; Infestation ; Processing fishery products ; Fish storage ; Sodium chloride
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 455-458
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    Role of women in fisheries and fish processing: a global view (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23522 | 19325 | 2018-05-09 12:25:25 | 23522 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Women are the majority of the third World population. They are considered subservient to their male counterpart, even in Europe and America where women have greater basic human right. This paper evaluates the various roles of women in Fisheries and fish processing. Statistics from the European Union shows that, of the various fishing sectors, participation of women (in terms of number) was greatest in fish processing, followed by marine aquaculture, marine fishing and inland aquaculture, with no women involved in inland fishing. In Asia and Africa women are basically involved in fish processing and marketing. In Asia (Thailand and Philippines), women are involved in hatchery operations in aquaculture in addition to fish processing. The finding of the review shows that Fish processing in developing countries, principally Africa is not attracting young literate generation who may have better management competence. It further revealed that, in Nigeria women are directly involved in capture fishery, in addition to fish marketing and processing. This is aimed at empowering women economically to meet the pressing needs of the family. The paper further assesses the problems of women in fisheries and fish processing namely, access to financial resources, education, support services and the need to ensure food security. Possible ways of improving women’s participation in fisheries were highlighted.
    Description: Includes:-1 table.;23 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Women ; Processing fishery products
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 640-648
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    Effects of diesel-oil spillage of fresh, brackish and marine waters on polyvinyl-alcohol (PVA) synthetic fishing twine (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24184 | 19325 | 2018-05-16 14:38:37 | 24184 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of diesel-oil spillage of fresh (0.4ppt), brackish (25ppt) and marine (37ppt) waters on elongation (cm) and breaking load (kgf) of artisanal PVA synthetic twine of varied diameter (4mm, 6mm, 8mm and 10mm) soaked for 16 weeks was studied. Chemical (solubility) test was carried out to identify the experimental twine as PVA among other synthetic twines. The elongation (cm) and breaking load (kgt) of PVA twine diameters were tested by tensile-strength gauge machine (0-200kg) and was carried out in unpolluted (control) and polluted states (spillage level) at 0%, 20%, 40%, 60%, 80% and 100% diesel-oil concentrations of different water salinity. Factorial statistics was used to analyze the treatments; twine (at four levels), water salinity (at three levels) and concentrations (at six levels). This implies 4 by 3 by 6, replicated in four places (288 treatments). Results indicated that elongation (cm) and breaking load (kg) of the specimens were significantly (P〈0.05) influenced by twine thickness. Twine l0mm soaked in 3.0 litres of unpolluted freshwater had significant (p〈0.5) correlation coefficient r,0.927 and lowest r- value of 0.499 was obtained in twine 4mm soaked in 100% diesel-oil concentration. Significant (P 〈0.05) relationships were observed between the correlation coefficient r = 0.531-0.927 for unpolluted and r = 0.499-0.592 for polluted tests. The study revealed that diesel-oil spillage had negative effects on the quality of twines. The thicker the PVA twine diameters (10, 8, 6 and 4mm) at lowered (0%, 20%, 40%,60%,80% & 100%) diesel-oil spillage of fresh (0.4ppt), Brackish (25ppt) and Marine (37ppt) waters respectively, the higher the significant (P〈0.05) elongation (cm) and breaking load (kgt) were evaluated in most cases.
    Description: Includes: 4 tables.;Also includes: 12 references.
    Keywords: Conservation ; Fisheries ; Nigeria ; Ogun State ; Diesel-Oil ; PVA synthetic fishing twine ; Freshwater ; Brackishwater ; Marine water ; brackishwater environment ; freshwater environment ; marine environment ; Fuels ; Crude oil ; Synthetic fibres ; Yarns ; Saline water ; Fresh water ; Brackish water ; Netting materials ; Gear research ; Tensile strength ; Materials testing ; Comparative studies
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 134-139
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    Effects of NIOMR smoking kiln and oven on the crude protein, minerals and vitamins of catfish Clarias gariepinus (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24197 | 19325 | 2018-05-16 15:16:21 | 24197 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of two different preservative methods, NIOMR Smoking Kiln and Oven drying on Crude Protein minerals and Vitamin of clarias gariepinus were studied. Clarias gariepinus were obtained from the fish farm of African Regional Aquaculture Centre, Aluu, Port Harcourt. The crude protein, minerals and vitamins of the fresh fish were determined immediately while two other batches were separately dried using oven at 50~'C for 30minutes and NIOMR Smoking Kiln at 70~'C for 3 hours. Result of the crude protien of fresh fish was 21.84 ~c 1.10 which increased to 59.53 ~c 1.88 and 35.41 ~c 1.00 in both NIOMR smoking and oven, respectively. This means that, there was a significant different in both dryers on the crude protein. This will improve the knowledge and capacity of rural women and agricultural communities on the appropriate processing method for fish. The mineral and vitamins of oven dried and NIOMR Smoking kiln were analyzed. The vitamin content of both the fish, dried and smoking kiln shows no significant different except in vitamin A which was significant (p〈0.05).There was significant different (p〈0.05) in the mineral content of the two different drying method except in sodium, Potassium and Phosphorus of the drying method. This result indicates that the two drying methods have effects on the nutritional quality of catfish.
    Description: Includes: 2 tables and 1 figure.;Also includes: 7 references.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Port Harcourt ; Smoking ; Production ; Preservative research ; Quality ; freshwater environment ; Processing fishery products ; Freshwater fish ; Proteins ; Vitamins ; Minerals ; Cured products ; Quality assurance ; Aquaculture equipment ; Nutritive value ; Drying ; Methodology ; Comparative studies
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 184-187
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