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  • 1
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 78-87
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  • 2
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 119-123
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  • 3
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 134-137
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  • 4
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    Growth response and survival of Heterobranchus longifilis cultured at different water levels in outdoor concrete tanks: implications for culture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23425 | 19325 | 2018-04-25 19:31:54 | 23425 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Thirteen-day-old hatchery-raised fry obtained from hormonally-induced spawns of mature African catfish H. longifilis broodstock were introduced to three different water levels (0.35, 0.50 and 0.65 m) in four replicates in 12 units of 2x2x1m3 outdoor concrete tanks. The fry were similarly stocked initially at 50 fry/m2 and later thinned down to 5 fish/m2 and cultured for 6 months. Fish were fed twice daily with commercial pellet feeds (Coppens?) while adjusting the feeding rate from 10 to 4% body weight and pellet size from 0.2 to 4.5 mm. The effects of pond water levels were evaluated in growth responses and survival. Water quality variables were similar (p 〉 0.05) in all compartments. Temperature, dissolved oxygen and pH were at the optimum level for fish. The results reveal significant (P 〈 0.05) treatment effects on growth performances. Fish kept at the highest pond water depth (0.65m) were heavier (P 〈 0.05) and had a higher specific growth rate (P 〈 0.001) than the others. Food conversion ratio and survival rate were unaffected by the experimental treatments. ANOVA revealed significant differences (P〈0.05) with culture period. The lowest water depth (0.35 m) favoured fish growth in the first 3 months while the highest water depth (0.65 m) favoured fish growth from the fourth month upwards (P〈0.05). These results are important because they indicate the optimum water depths for the culture of H. longifilis from fry to sub-adult and from the grow-out/fattening of sub-adult to adult, respectively, in outdoor concrete tanks.
    Description: Includes:- 3 figs.;35 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Abia State ; freshwater environment ; Fish culture ; Survival ; Feeding experiments
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 64-72
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  • 5
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 226-231
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  • 6
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 258-265
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  • 7
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    Evaluation of nutritional composition of waterlily (Nymphaea lotus Linn) from Tatabu-Flood Plain, north central Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23501 | 19325 | 2018-05-07 12:24:04 | 23501 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The proximate composition of leaves, petiole, root, rhizome and seeds of waterlily harvested from Tatabu flood plain/wetlands were determined and analyzed in percentages. Moisture content was highest in the rhizome (20.40 ~C 1.241) while the seeds gave the lowest value of (4.18 ~c 0.176). The highest value for Ash content was observed in the root (27.36 ~C 1.261) and the seeds gave the lowest (2.81 ~c 0.498). Highest value for the Crude fat was obtained from the seeds (9.95 ~c 0.637) whiles the petiole gave the lowest value of (2.27 ~c 0.377). The Crude protein and Crude fibre values were highest in the leaves (19.5 4~c 0.782) and; (15.53 ~c 0.448) while the lowest was obtained in the seeds (3.27 ~c 0.104), (1.60 ~c 0.200) respectively. There was a significant differences among the parts analyzed for the Ash content (p〈0.05). The NFE varied from (31.21 ~c 2.176) to (78.15 ~c 1.418)
    Description: Includes:- 1 table.;19 refs.
    Keywords: Biology ; Ecology ; Nymphaea lotus ; Nigeria ; Tatabu Floodplain ; Proximate composition ; freshwater environment ; Aquatic plants ; Chemical composition ; Chemical properties ; Moisture ; Lipids ; Nutritive value
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 512-515
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  • 8
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    The comparative effect of fish and blood meal based diets on the growth and survival of juvenile tilapia (Oreochromis niloticus) in concrete tank (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23508 | 19325 | 2018-05-08 15:31:05 | 23508 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An experiment was carried out to find out the comparative effect of imported fish meal, blood meal and local fish waste based diets on the growth and survival of juvenile tilapia. (O. niloticus) in concrete tank. Four diets consisting of N.I.O.M.R. pelleted feed containing 40% CP, with imported fish meal, as the control and three others formulated with fresh, boiled cattle blood and local fish waste meal at 30% CP, were fed to juvenile tilapia with average initial weight of 55.24g in four treatments and four replicates in a completely randomized design. Result indicated final body weights of 100.83, 96.54, 98.4 and 86.82g and average body length of 18.47, 18.16, 18.4 and 18.14cm, for treatments 1 (control), 2 (fresh blood based diet), 3 (boiled blood based diet) and 4 (local fish waste meal based diet) respectively, with no significant difference between the treatments (P〉0.05). The same was also true for average daily weight gain of 0.41, 0.36, 0.31 and 0.28g. However, treatment 1 and 2 had better relative weight gain 93.69 and 80.21%, than 3 and 4 at 62.37 and 64.85% respectively, (P〈0.05). The survival was 100% in all treatments. Treatment 2 was more cost effective at N539.06/Kg fish, followed by 1 with N667.52. Treatments 3 and 4 had the highest at N698.20 and N718.60 per kg fish. The trial showed that tilapia feed processed with fresh cattle blood performed as well as imported fish meal, boiled blood and local fish waste and in addition was more cost effective.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Port Harcourt ; Feed evaluation ; freshwater environment ; Feeding experiments ; Diets ; Nutritional requirements ; Survival ; Growth rate
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 550-555
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  • 9
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    Climate change: implications for fisheries and coastal aquaculture (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23531 | 19325 | 2018-05-09 13:01:07 | 23531 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A keynote address at the 25th annual conference of the Fisheries Society of Nigeria. The paper presented evidence of climate change in the past and discussed the issue of global warming in the past, present and future. The Greenhouse effects are some of the topics discussed. Discussed in greater detail is the Nigerian situation in the global warming and climate change. The potential impacts on aquaculture has been enumerated. The paper is concluded by given suggestionswhich mitigate the impact of climate change and called on the Federal Ministry of Environment to strengthen research and other arms of government to create a strong synergy to work towards ameliorating the impact of climate change in the country.
    Description: Keynote address at the 25th Annual Conference of the Fisheries Society of Nigeria. Includes:- 2 tables.;6 figs.;6 plates;12 refs.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Climatic changes ; Fisheries ; Aquaculture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-38
    Format: 38
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  • 10
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    Growth, survival rate and condition factor of Heteroclarias hatchlings fed cultured Moina micrura, shell free Artemia and combination of both as starter feed (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23503 | 19325 | 2018-05-07 12:27:24 | 23503 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Growth (Percentage weight gain, Specific growth rate , total body length), survival rate and condition factor of Heteroclarias fry fed shell free Artemia, cultured Moina micrura and mixture of both as starter feed were investigated. 30 individual fry were placed in a 4-litre plastic bowl in three treatments of 3 replicates for 25 days in Fish Hatchery. Individual water quality parameters (water pH, temperature, Dissolved oxygen, total Alkalinity and carbon dioxide) monitored for each treatment were not significantly different (p〉0.05) from each Heteroclarias fry fed live M. micrura had the highest percentage weight gain (496.03%), Specific growth rate (3.09), percentage survival rate (88.83%) and condition factor (39.75) but these results were not significant different (P〉0.05) from those of shell free Artemia except those of condition factor. Shell free Artemia and Live M. micrura combination was observed to have the lowest fry Percentage weight gain (428.30%),. specific growth rate(2.54), % survival rate (85.50), condition factor(24.39) and total body length(1.52cm). The highest total body length was observed in shell free Artemia although not significantly different (p〉0.05) from others. The implication of using cultured live M. micrura instead of shell free Artemia as starter diet for Heteroclarias hatchlings at the critical stage of development are discussed
    Description: Includes:- 6 figs.;16 refs.
    Keywords: Aquaculture ; Heteroclarias ; Moina micrura ; Nigeria ; Keffi ; freshwater environment ; Growth rate ; Survival ; Condition factor ; Feeding experiments ; Fish culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 519-525
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