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  • freshwater environment  (607)
  • 2020-2022  (607)
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  • 1
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    Efecto de la radiación ultravioleta sobre los ecosistemas acuáticos (2021)
    In:  http://aquaticcommons.org/id/eprint/16701 | 9602 | 2016-05-04 14:16:51 | 16701 | Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, Argentina
    Details
    Publication Date: 2021-07-08
    Description: Hasta hace poco tiempo se consideraba que la radiación ultravioleta carecía de importancia como factor ambiental en los ecosistemas acuáticos, ya que se suponía que se absorbía totalmente en los primeros centímetros de la columna de agua. Gracias al desarrollo de mejores instrumentos de medición, hoy se sabe que la penetración de la radiación ultravioleta en el agua es mucho mayor que la estimada anteriormente, y que sus efectos biológicos resultan observables hasta decenas de metros de profundidad. Este artículo de divulgación científica incluye, además de lecturas sugeridas, información del ozono estratosférico y troposférico, y sobre factores que afectan la intensidad de la radiación ultravioleta que llega a la superficie terrestre.
    Description: Reprinted as: pp.41-47 in, Ciencia del Mar. Volumen temático 1, 12/2014; Asociación Ciencia Hoy. ISBN: 978-987-45584-0-4 (Special issue dedicated to 'Marine Sciences: 1988-2014')
    Keywords: Biology ; Conservation ; Ecology ; Environment ; Pollution ; PSW ; Argentina ; freshwater environment ; marine environment ; ultraviolet radiation ; ozone ; ecosystems
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 22-29
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  • 2
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    Die Leitfähigkeit des Fischkörpers (2021)
    In:  sf@vti.bund.de | http://aquaticcommons.org/id/eprint/7905 | 1240 | 2012-02-16 12:46:06 | 7905 | Bundesforschungsanstalt für Fischerei
    Details
    Publication Date: 2021-06-26
    Description: Johann Heinrich von Thunen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung – Information on Fishery research in 2010
    Keywords: Biology ; Fisheries ; electric effects ; fish behaviour ; electric field ; physical effects ; freshwater environment
    Repository Name: AquaDocs
    Type: article , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 77-78
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  • 3
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    Pototan: Going for native catfish (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20048 | 2002 | 2016-03-04 15:19:32 | 20048 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-07
    Keywords: Aquaculture ; Clarias macrocephalus ; Philippines ; Panay I. ; Iloilo ; Pototan ; freshwater environment ; Aquaculture development ; Endemic species ; Fish culture ; Freshwater aquaculture ; Freshwater fish
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 20
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  • 4
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    State of Philippine coastal fisheries (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20128 | 2002 | 2016-03-04 14:35:22 | 20128 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-08
    Keywords: Fisheries ; Philippines ; brackishwater environment ; freshwater environment ; marine environment ; Coastal fisheries ; Coastal zone management ; Environmental degradation ; Fishermen ; Fishery development ; Fishery management ; Fishery regulations ; Illegal fishing ; Overfishing ; Policies ; Resource conservation ; Resource management ; Restoration ; Socioeconomic aspects ; Sociological aspects
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 14-17
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  • 5
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    Family farms in Vietnam (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20151 | 2002 | 2016-03-04 14:17:50 | 20151 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-08
    Keywords: Aquaculture ; Vietnam ; freshwater environment ; Agropisciculture ; Aquaculture development ; Aquaculture economics ; Aquaculture techniques ; Brackishwater aquaculture ; Fish culture ; Freshwater aquaculture ; Mangroves ; Pond culture ; Rice field aquaculture ; Rice fields ; Small scale aquaculture ; Shrimp culture ; Yield
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 21-22
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  • 6
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    Facing the challenges in aquaculture through biotechnology (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/19961 | 2002 | 2016-02-25 19:21:02 | 19961 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-06
    Keywords: Aquaculture ; Biology ; Health ; brackishwater environment ; freshwater environment ; marine environment ; aquaculture development ; biotechnology ; disease detection ; DNA ; genetically modified organisms ; GMO ; genetics ; genomes ; immunity
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: pp. 17, 20
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  • 7
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    Growth and yield of Asian catfish Clarias macrocephalus (Gunther) fed different grow-out diets (2021)
    In:  aqdchief@seafdec.org.ph | http://aquaticcommons.org/id/eprint/19953 | 2002 | 2016-02-23 22:45:44 | 19953 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-06
    Keywords: Aquaculture ; Clarias macrocephalus ; Philippines ; freshwater environment ; aquaculture economics ; biochemical composition ; culture effects ; diets ; feasibility ; feed ; feed composition ; feeding experiments ; feed efficiency ; feeding ; freshwater aquaculture ; freshwater fish ; sediment properties ; pond culture ; taste tests ; water quality ; yield
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: pp. 4-5, 15
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  • 8
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    Laguna de Bay and LLDA (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20042 | 2002 | 2016-03-04 16:30:05 | 20042 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-07
    Keywords: Fisheries ; Aquaculture ; Aristichthys nobilis ; Philippines ; Luzon I. ; Laguna de Bay L. ; freshwater environment ; Cage culture ; Catch/effort ; Fisheries ; Freshwater aquaculture ; Freshwater fish ; Freshwater lakes ; Livelihoods ; Resource management ; Sociological aspects
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 32
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  • 9
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    The practice of carp hatchery technology around Laguna de Bay (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20038 | 2002 | 2016-03-04 16:32:54 | 20038 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-07
    Keywords: Aquaculture ; Aristichthys nobilis ; Philippines ; Luzon I. ; Laguna de Bay L. ; freshwater environment ; Aquaculture development ; Aquaculture economics ; Brood stocks ; Freshwater fish ; Freshwater aquaculture ; Freshwater lakes ; Fry ; Fingerlings ; Hatcheries ; Induced breeding ; Introduced species ; Lake fisheries ; Seed (aquaculture) ; Seed production ; Socioeconomic aspects
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: pp.26-27, 34
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  • 10
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    Center promotes land-based carp culture (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20043 | 2002 | 2016-03-04 16:29:37 | 20043 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-07
    Keywords: Aquaculture ; Aristichthys nobilis ; Philippines ; Luzon I. ; Laguna de Bay L. ; freshwater environment ; Aquaculture development ; Aquaculture economics ; Aquaculture techniques ; Brood stocks ; Freshwater fish ; Freshwater aquaculture ; Fry ; Fingerlings ; Gene pool ; Hatcheries ; Research institutions ; Seed (aquaculture) ; Seed production ; Socioeconomic aspects ; Sociological aspects
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 33-34
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  • 11
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    Bighead carp grow-out in Laguna de Bay (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20041 | 2002 | 2016-03-04 16:30:31 | 20041 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-07
    Keywords: Aquaculture ; Aristichthys nobilis ; Philippines ; Luzon I. ; Laguna de Bay L. ; freshwater environment ; Aquaculture economics ; Fingerlings ; Fish culture ; Freshwater aquaculture ; Freshwater lakes ; Freshwater fish ; Fry ; Cage culture ; Technology transfer
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 31
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  • 12
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    Checklist of species for cage/pen culture (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20119 | 2002 | 2016-03-04 14:39:27 | 20119 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-07
    Keywords: Aquaculture ; brackishwater environment ; freshwater environment ; marine environment ; Aquaculture techniques ; Cage culture ; Cages ; Check lists ; Cultured organisms ; Fish culture
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: pp.12-13, 29
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  • 13
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    Backyard fish farming (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20124 | 2002 | 2016-03-04 14:36:57 | 20124 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-08
    Keywords: Aquaculture ; brackishwater environment ; freshwater environment ; Brackishwater aquaculture ; Construction ; Fish culture ; Freshwater aquaculture ; Small scale aquaculture
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 22
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  • 14
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    Nature parks for environment education and biodiversity in the Philippines (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20142 | 2002 | 2016-03-04 14:23:05 | 20142 | Southeast Asian Fisheries Development Center, Aquaculture Department
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    Publication Date: 2021-07-08
    Keywords: Conservation ; Philippines ; Philippines ; brackishwater environment ; freshwater environment ; marine environment ; Biodiversity ; Education ; Environmental protection ; Marine parks ; Nature conservation ; Potential resources ; Protected areas ; Resource conservation
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: pp.8-9, 26
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  • 15
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    Museums, gardens, zoos, and wildlife breeding centers in the Philippines (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20148 | 2002 | 2016-03-04 14:19:30 | 20148 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-08
    Keywords: Conservation ; Philippines ; Philippines ; brackishwater environment ; freshwater environment ; marine environment ; Aquaria ; Biodiversity ; Biological institutions ; Breeding ; Education ; Environmental protection ; Marine parks ; Museums ; Nature conservation ; Research institutions
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: pp.9-10, 32
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  • 16
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    Seabass grow-out and marketing: lessons from Australia, Malaysia, and Thailand (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20150 | 2002 | 2016-03-04 14:18:25 | 20150 | Southeast Asian Fisheries Development Center, Aquaculture Department
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    Publication Date: 2021-07-08
    Keywords: Aquaculture ; Management ; Lates calcarifer ; Malaysia ; Thailand ; Australia ; brackishwater environment ; freshwater environment ; marine environment ; Aquaculture economics ; Aquaculture techniques ; Cage culture ; Costs ; Euryhalinity ; Feed ; Feeding ; Fingerlings ; Fish culture ; Floating cages ; Freshwater aquaculture ; Harvesting ; Marine aquaculture ; Marketing ; Pond culture ; Stocking density ; Water management
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 27-28
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  • 17
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    The seabass market (2021)
    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20149 | 2002 | 2016-03-04 14:18:53 | 20149 | Southeast Asian Fisheries Development Center, Aquaculture Department
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    Publication Date: 2021-07-08
    Keywords: Fisheries ; Lates calcarifer ; brackishwater environment ; freshwater environment ; marine environment ; Aquaculture economics ; Aquaculture techniques ; Aquaculture products ; Consumers ; Euryhalinity ; Fish culture ; Costs ; Fishery products ; Marketing ; Trade
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: pp.25-26, 31
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  • 18
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    Effects of crude oil and the fractions on the blood haemoglobin and neutrophil concentrations in Heterobranchus bidorsalis juveniles (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22997 | 19325 | 2018-03-05 09:06:04 | 22997 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Studies on the effects of crude oil and its fractions on the blood haemoglobin (HB) neutrophil (NP) concentration in the blood of Heterobranchus bidorsalis juveniles were carried out. Two study periods (toxicity and recovery) and four oil types (Bonny-light crude oil (BLCO), premium motor spirit (PMS), kerosene (DPK) and lubricating engine oil (lBO) at 1.00, 2.00, 4.00 and 8.00ml were used. There were significant differences (P〈0.05, p〈 0.01) on the HB and NP values in blood of fish samples. The elevated values of HB levels in fish exposed to 2.00,4.00 and 8.00m1 L-1 BLCC, 2.00ml L-1 PMS and DPK; and 4.00ml L -1 LBO over the levels in the control fish were in consonance with the results of other workers. Increases in NP values in fish exposed to the four oil types (BLCO, PMS, DKP and LBO) relative to the control could be part of the immunological attempts by the fish to mobilize the body's defence mechanisms. The relatively high percent mortality and low survival of H. bidorsalis juveniles exposed to 4.00 and 8.00mlL-1 concentration of the four oil types over the other concentration implied that these concentrations were probably lethal to fish existence.
    Description: Includes:- 4 tables.;23 refs.
    Keywords: Fisheries ; Health ; Pollution ; Heterobranchus bidorsalis ; Nigeria ; Delta State ; freshwater environment ; Crude oil ; Fish ; Toxicity ; Haemoglobins ; Lethal effects
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 152 - 159
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  • 19
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    An observation on the acquisition or loss of trematode (Clinostomum tilapiae) by Tilapia (Oreochromis niloticus) in culture systems (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23041 | 19325 | 2018-03-05 20:38:04 | 23041 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The acquisition or loss of Clinostomum tilapiae parasites by Oreochromis niloticus was studied. Four groups of 25 healthy fishes were stocked in the upper part of serial experimental ponds, while another four groups of 25 infected fishes were also stocked at the rear part of the serial experimental ponds. All the groups were fed at 3% body weight with the same compounded fish feed. Acquisition or loss of parasites and growth was monitored for a period of six months. The mean relative growth rate was 11.04kg/month for the healthy fishes and 5.62g/month for the infected fishes. The mean specific growth rate was 38.75% and 31.25% for the healthy and infected groups respectively. However the results were not statistically significant (p 〉 0.05). The parasite did not multiply on the host body rather the infection rate reduced from 100% to between 44 and 78%, parasite burden was reduced from an average of 3 per fish to 2.25 while the healthy fish acquired the parasite and the average burden was 2.15. The mean values of the prevailing water quality parameters were within the optimum range acceptable in fish culture systems in the tropics.
    Description: includes:- 1 table.;9 refs.
    Keywords: Aquaculture ; Ecology ; Nigeria ; Ibadan ; freshwater environment ; Parasites ; Parasitic diseases ; Infectious diseases ; Fish diseases
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 296 - 298
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  • 20
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    The role of information in harnessing fisheries and eco-tourism for national development (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23001 | 19325 | 2018-03-05 09:29:09 | 23001 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-12
    Description: The importance of information in every sector cannot be over-emphasized. The ability to identify and utilize our natural endowment depends on the availability of information resources within or at the right time. The low level of information provision in Nigeria is attributed to infrastructure as a result of inadequate funding of the sector. Research has shown that information has revolutionized the society, moving the world from the industrial age to the information age and completely changing the way the economy functions. Success goes with the best information. However, for now, if there must be increase in fish production and eco-tourism participation, employment opportunities, poverty reduction, food security and nature appreciation in terms of environment and living creatures, our fisheries scientists and policy makers will have to rely on sources of information using the advantage of libraries, and Information Communication Technology (lCT). This development in information resources affects many areas of Nigerian economy including the fisheries and eco-tourism sectors. The contribution of information resource in the development of the fisheries sub-sector can be viewed under those of fisheries information products like the Nigerian Fisheries and Aquatic Sciences. (NIFFIC) database, Proceedings of national conferences of Fisheries Society of Nigeria (FISON), annual and technical reports Fisheries Research Institutes in Nigeria. Also to be brought under perspective is the information products of eco-tourist institutions like the Nigerian National Parks.
    Description: Includes:- 1 table.;1 fig.
    Keywords: Fisheries ; Information Management ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Information services
    Repository Name: AquaDocs
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    Format: 178 - 182
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  • 21
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    Profitability of an economic diet in practical fish farming: a case study of vitamin C inclusion in the diet of Heterobranchus longifilis fingerlings (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23036 | 19325 | 2018-03-05 09:16:43 | 23036 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A completely randomised design with three replicates was used for an experiment conducted to study the profitability of vitamin C inclusion into the ration formulation for Heterobranchus longifilis. Six different levels 0, 50, 100, 150, 200 or 250 mg of L-ascorbic acid (vitamin C) kg-1 diet was included in a 42.5% crude protein basal diet and fed to triplicate groups of twenty fingerlings. The groups fed diets with vitamin C had statistically significant (P〈0.05) higher final weight than the group fed the control diet without vitamin C at the end of twenty weeks study, Feed consumed was significantly (P〈0.05) lower in the group fed diet without vitamin C. There was a significant (P〈0.05) difference between the groups fed 0 and 50 mg vitamin C kg-1 diets, but no significant (P〉0.05) difference between the groups fed diets with 100, 150, 200 and 250 mg vitamin C kg-1 diet on this parameter. Mortality was significantly (P〈0.05) higher in the groups fed diet without vitamin C while there was no significant difference (P〉0.05) between the fish fed the diets with respective graded levels of vitamin C. The thiobarbituric acid reactive substance (TBARS) of the liver and whole body of fish was significantly (P〈0.05) higher in fish fed diet devoid of vitamin C. Cost per kilogram of fish base on feed input was significantly (P〈0.05) higher in the group fed diet without vitamin C than those enriched with vitamin C. However, within groups fed with vitamin C cost per kg of fish was significantly (P〈0.05) decreasing in the following order: diet 2〉 diet 6〉 diets 4, 5, and 3. There was no significant difference (P〉0.05) between fish fed diets 3, 4 and 5 with respect to cost per kilogram of fish. This study vividly showed that there is no alternative to the use of a complete diet with vitamin C in an intensive practical farming of H. longifilis geared towards optimum profit maximisation in terms of feed as one of the variable input.
    Description: Includes:-2 tables.;20 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Diets ; Feeding experiments ; Vitamin C
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
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    Format: 270 - 275
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  • 22
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    Growth performance of Clarias gariepinus fingerlings fed cooked breadfruit (Artocarpus altilis) seed meal as replacement for maize in outdoor hapas (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23040 | 19325 | 2018-03-05 20:36:36 | 23040 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The growth performance and nutrient utilization in Clarias gariepinus fingerlings fed cooked breadfruit (Artocarpus altilis) seed meal based diet as a replacement for maize, investigated for 8 weeks. Five (5) diets of breadfruit seed meal substituted for maize at different levels of inclusion (0%; 25%; 50%; 75% and 100%) were fed to the fingerlings at 5% body weight twice daily in hapa of 1m x 1m x 1m. The hapas wee submerged in a pond and each hapa stocked with 20 fingerlings of mean weight of 5.8~c0.00g. Evaluation of growth parameters nutrient utilization of the experimental diets showed that there was no significant difference (P〉0.05) in mean final weight (MFW); specific growth rate (SGR); feed conversion rate (FCR) protein efficiency ratio (PER) and apparent net protein utilization (ANPU) among the treatments. The results suggested a net advantage of replacing dietary maize with cooked breadfruit seed meal for Clarias gariepinus fingerlings at 50% and above levels of inclusion under the condition of the experiment.
    Description: Includes:- 4 tables.;10 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Makurdi ; freshwater environment ; Fish culture ; Feeding experiments ; Growth rate ; Diets
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
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    Format: 292 - 296
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  • 23
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    Evaluation of different soybean-based diets on growth and nutrient utilization of Heterobranchus longifilis in aquaria tanks (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23034 | 19325 | 2018-03-05 09:13:55 | 23034 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: In order to compare the effect of raw, cooked, toasted and extruded soybean meals on the growth and nutrient utilization of Heterobranchus longifilis fingerlings, 120 pure Heterobranchus longifilis fingerlings were purchased at the National Institute for Freshwater Fisheries Research (NIFFR) improved genetic fish hatchery and randomly allocated into four different treatments with two replicates each with 15 fingerlings in 8 aquaria tanks. Four different diets containing 40% crude protein each were compounded and fed to the fish at 5% body weight for 56 days. At the end of the feeding trials, growth performance and nutrient utilization were evaluated. The results revealed that fish fed toasted soybean-based diets had highest mean weight gain (MWG) of 16.39g, specific growth rate (SGR) of 2.03%/day, and food conversion ratio (FCR) of 2.18. The fingerlings fed the extruded soybean-based diet gave the least growth performance. It could be concluded in practice, that toasted soybean-based diet is optimal for growth of Heterobranchus longifilis fingerlings.
    Description: Includes:- 5 tables.;3 fig.;7 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Diets ; Nutritive value ; Feeding experiments
    Repository Name: AquaDocs
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    Format: application/pdf
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    Format: 255 - 263
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  • 24
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    Analysis of physicochemical characteristics of some freshwater bodies in Essien Udim Local Government Area of Akwa Ibom State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23044 | 19325 | 2018-03-05 20:45:24 | 23044 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The physical and chemical characteristics of freshwater bodies Ikot Ebak and Abeneyentem streams in Essien Udim Local Government Area, Akwa Ibom State, Nigeria were studied from (July December 1996). The mean values obtained in the two water bodies were pH (6.8~c0.12, 6.8~c0.09, respectively). Conductivity (4.9~c2.26, 5.0~c2.09 iScm-1), total dissolved solid (16~c7.58, 37~c26.9 mg/l), TSS (46~c26.0, 53~c53.1)g/l), alkalinity (17.5~c7.27, 10.7~c8S MgCaCo3/1), DO (6.98~C1.46, 8.3~C29.0mg/1), BOD (2.65~c2.44, 3.15~c2.79mg/1), Salinity (0.41~c0.12, 0.31~c0.04%o') total hardness (0.64~c0.21, 0.84~c0.42mg/l, N03-N (0.31~cO.26, 0.35~c0.29mg/l), and PD4-P (0.022~c0.0199 0.023~c.022mg/1), respectively. There were significant difference in the means of the parameters in the two water bodies except TDS, Alkalinity and Hardness. The water bodies were found to be slightly acidic with low conductivity. The properties in the water bodies were in conformity with international standards for both drinking and aquatic life.
    Description: includes:- 2 tables.;6 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Ikot Ebak ; Nigeria ; Abeneyentem ; freshwater environment ; Physicochemical properties ; Alkalinity ; Salinity ; Dissolved oxygen
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    Evaluation of pawpaw leaf-based diets (Carica papaya) on growth and survival of African catfish (Clarias gariepinus) fingerlings reared in plastic bowls (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23049 | 19325 | 2018-03-06 15:26:25 | 23049 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: 200 fingerlings of African catfish (Clarias gariepinus) of average weight of 22.8~c0.04g were used to investigate the nutritive value of Pawpaw (Carica papaya) leaf-based diets. Five (5) isocaloric and iso-nitrogenous diets containing fishmeal protein at a rate of 0%, 25%, 50%, 75%, and 100% along with the pawpaw leaf were formulated. The diet without the pawpaw leaf meal serves as the control. The fish fingerlings were fed at 5% body weight per day for 56 days in plastic bowls. It was observed at the end of the experiment that pawpaw leaf meal was suitable as a protein supplement when incorporated at 50% replacement. The body weight gain, specific growth rate (SGR) and food conversion ratio (FCR) values of 18.68g, 1.07%/ day and 4.72 respectively were highest in diet with 50% replacement closely followed by diet with 25% replacement. Based on the results, it could be recommended that in practice 50% replacement of pawpaw leaf meal with fish meal is optimal in practical diet of African catfish (Clarias gariepinus) fingerlings. Nevertheless, complete replacement of pawpaw leaf meal decreases growth rate and should not be used in Clarias gariepinus fingerlings.
    Description: Includes: - 3 tables.;5 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Carica papaya ; Nigeria ; freshwater environment ; Fish culture ; Feeding experiments ; Diets
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    Assessment of capital assets and utilization amongst artisanal fishers in Tatabu fishing community (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23054 | 19325 | 2018-03-06 15:33:34 | 23054 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Sustainable development in Tatabu fishing community can hardly be attained without a systematic socio-economic consideration of the productive activities and development needs of the people. Generally two important factors play a great role in rural livelihoods; the prevailing structures and processes and access to assets, which can be combined in a various ways to generate positive outcomes. In essence poverty and the opportunity to escape from it depends on all the above. The assets comprise of human, natural, social, physical and financial. The present study (emperically analyzed their strength, linkages and the effects of policy and structures on them, particularly as it translates to the socio-economic well-being of the fishers.
    Description: Includes:- 3 tables.;9 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Tatabu L. ; Livelihood ; freshwater environment ; Artisanal fishing ; Investments ; Financial resources ; Fishery economics ; Labour
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    Effects of insects infestation on the shelf-life of smoked dried fish: a review (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23057 | 19325 | 2018-03-05 20:48:39 | 23057 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Most of the fish produced in Nigerian fresh-water systems are marketed as dried fish, since there are few alternative methods of preservation for distant markets. Considerable quantities are lost through insect infestation, fragmentation during sorting, mixing, storage and transportation. In Nigeria, a high proportion of the dried fish sold in the market harbours beetle infestation, mainly Dermestes maculatus and Necrobia rufipes. D. maculatus is the dominant pest, accounting for 50.0%. The larvae of both beetles are the most numerous forms and are responsible for a large proportion of the damage of dried fish.
    Description: includes:- 7 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Aquatic insects ; Infestation ; Cured products ; Dried products ; Storage life
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    Format: 369 - 372
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    Consumers' preference of fish products in Yenagoa metropolis, Bayelsa State (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23055 | 19325 | 2018-03-06 15:35:00 | 23055 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The study was conducted to assess consumer's preference of fish products in Yenagoa Metropolis, Bayelsa State. One hundred and ninety consumers were randomly selected for the study. Results showed that fishery products in Yenagoa metropolis include fresh, smoked, fried, dried, canned and frozen fish. Sixty-eight percent of the respondents said that the products are enough, whereas seventy-six percent feel the variety of fishery products is low. Majority of the respondents (86%) preferred fresh fish followed by smoked fish which was preferred by sixty-four percent of the respondents. Age, ethnic grouping, gender, marital status and education did not have any significant influence on the preferences of the consumers (P〉O.05). Major problems identified by the consumers were exorbitant prices of fish because of the activities of middlemen, unhygienic selling environment and scarcity of fish products. Consequently, it is recommended that an adequate system of financing small scale fisheries be evolved to reduce the influence of middlemen; sanitary laws should be enacted and enforced in the fish markets around the metropolis; Establishment of modern fish markets in Yenagoa to boast fish production, aquacultural investors should be attracted.
    Description: Includes:- 3 figs.;9 refs.
    Keywords: Fisheries ; Nigeria ; Yenagoa ; freshwater environment ; Fish utilization ; Fishery products ; Consumers
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    Format: 359 - 362
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    Comparison of the quality of smoked Tilapia using mud kiln and modified drum kiln (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23060 | 19325 | 2018-03-06 15:40:12 | 23060 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Fresh tilapia (Oreochromis niloticus) was smoked using two different kilns to evaluate and compare the microbial changes or quality, physicochemical and organoleptic characteristics. Smoked samples were dominated by Gram-positive bacterial, flora, Bacillus, Streptococcus and Staphylococcus. Fungi isolated included Aspergillus spp, and Penicillium spp. The two kilns used in smoking are Modified Drum Kiln (MDK) and Mud kiln (MK). The MDK had a higher impact on the total viable count (TVC) and reduced the TVC of the fresh sample by 37.5% while the MK reduced it by 29.5%. In a similar trend the MDK reduced the number of Staphylococci and fungi by 43.3% and 33.8% respectively while the MK only reduces them by 30.9% and 26.3% respectively. Statistical test indicated significant difference (P〈0.05) in the microbial load of fish processed in the two kilns. However, the reduction of the Coliform by the two smoking kilns is not significantly different.
    Description: Includes:- 3 tables.;10 refs.
    Keywords: Fisheries ; Nigeria ; Smoked fish ; Smoking Kiln ; Tilapia ; freshwater environment ; Cured products ; Processed fishery products ; Quality ; Microbiological analysis
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    Effect of cold and hot smoking of Clarias gariepinus on consumer preference (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23062 | 19325 | 2018-03-10 14:32:20 | 23062 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The objective of this study was to determine the best smoking method that will enhance consumer preference for Clarias gariepinus without affecting negatively the nutritive value. Two methods of smoking were used: cold and hot smoking. The fish were smoked with improvised drum smoking kiln and oven. Smoked fish samples obtained were subjected to chemical analyses and sensory evaluation. Chemical analyses showed that the smoked fish were still rich in protein (66.0067.52%) and fat (9.83-12.28%); while the moisture content ranged between 7.82-8.24% and ash, 12.86-14.16%. There was no significant difference (P〉0.05) in the protein, ash and moisture contents. Significant differences (P〈0.05) were observed in the Calcium(Ca), Potassium(K), Sodium(Na), Zinc(Zn), Lead(Pb), Iron(Fe) and Phosphorus(P) contents. Only hot smoke-dried (HSD) fish samples showed no presence of lead. The levels of sodium(Na) and potassium(K) in the smoked fish were relatively high, though, the amount of potassium(k) was higher. Sensory evaluation results revealed that there were no significant differences (P〉0.05) in the colour and taste ratings of the smoked fish samples. However, significant differences (P〈0.05) were observed in the odour, texture and overall acceptability. Hot smoke-dried and cold oven-dried Clarias gariepinus had the best overall acceptability in ratings.
    Description: Includes:- 1 table.;2 figs.;12 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Fishery products ; Processing fishery products ; Cured products ; Curing ; Mineral composition
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    Women in frozen fish marketing in Lagos State: strategies and methods (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23067 | 19325 | 2018-03-10 14:36:09 | 23067 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Lagos state has a major sea port for landing of frozen fish from Mauritania, Senegal, the Scottish waters and other European countries. In the last three years, the dense population of the state has encouraged all kinds of trade to thrive. Fish as a major food in many Nigerian diets has been known to complement the high carbohydrate intake of majority of the Nigerian populace because of the unaffordable prices of beef in the market. The market for frozen fish is rich in Lagos. It has provided many women fishmongers a livelihood for over a decade. They have been able to sustain their families and improve their social status over the years. This study reports the modus operandi of the trade. The study covered a period of three months. Fish sales were monitored in Epe, Oyingbo, Ijora and Alaba markets. The cooperation of the heads of markets (Iya Olojas) were requested at every market. It was ensured that observations and the interviews/questionnaires do not interfere with the women's activities. Specific areas focused upon in the study included countries of fish imports, most acceptable species, packaging, purchase price, sales price and profit margins. Other important factors in the fish market that were studied included entrance into the fish marketing business, sources of finance and problems. The study also made suggestions on how to improve upon the fish marketing business of women in Lagos State.
    Description: Includes:- 1 table.;3 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Lagos State ; Frozen Fish ; freshwater environment ; marine environment ; Women ; Frozen products ; Processed fishery products ; Marketing ; Chilling storage
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    Effect of stocking density on the growth rates of Clarias gariepinus in a floating hapa system (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23037 | 19325 | 2018-03-05 09:18:00 | 23037 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: An experimental growth trial in floating net-hapas at three stocking densities in concrete pond was carried out. 4.68 5.25g mean individual weight fish were stocked at 25, 50 and 100 per m3. A 40% protein balanced diet was used as feed. The results of the study showed no statistical significant difference in growth among the three treatments. Food conversion ratios ranged in 1.60 to 1.82, and specific growth rates were between 3.80 and 4.16%/day. The result suggests that culture of C. gariepinus at a density of 50/m3 and production of 4.15kg/m3 in 84 days with production of 8.30kg/m3 in a growing season of 180 days is possible using the net-hapa systems enclosed in a concrete pond.
    Description: includes:- 2 tables.;8 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Alau L. ; freshwater environment ; Fish culture ; Stocking density ; Growth rate ; Floating cages
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    Quantification of vitamin C (ascorbic acid) requirements of Heterobranchus longifilis fingerlings (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23039 | 19325 | 2018-03-05 20:35:11 | 23039 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A feeding experiment was conducted to quantify the minimum dietary vitamin C requirement of Heterobranchus longifilis fingerlings and the minimal dietary inclusion levels that will meet these requirements after degradation from feed processing and storage. Fish were fed a basal diet with 42.5% crude protein for a conditioning period of 2 weeks. Following conditioning, fingerlings with initial mean weight, 2.3~c0.3 g were stocked as groups of 20 fingerlings into 30 litre tanks in a mini flowthrough experimental system and fed the basal diet and experimental diets supplemented with 0, 50, 100, 150, 200, or 250 mg of L-ascorbic acid kg-1 diet obtained from TUYIL PHARM. INDUSTRIES, lIorin, included into the basal diet by replacing part of the silica component and fed to triplicate groups for 20 weeks. Fish fed the control (0 mg vitamin C kg-1) diet exhibited deficiency signs including lordosis, caudal fin deformity, skin erosion and significantly suppressed weight gain and higher condition factor. Protein efficiency ratio and specific growth rate were significantly improved with increasing levels of vitamin C up to 200mg kg-1 diet. Tissue (liver, kidney, gills and muscle) ascorbate concentration generally reflected dietary inclusion levels with the signiticant lowest level occurring in the control groups. Vitamin C analysis after feed processing revealed 18 - 21% loss. The least mean squares error regression analysis of weight gain data on inclusion level of vitamin C revealed that the minimum dietary requirement of H. longifilis is 82.2~c0.2 mg vitamin C kg-1 diet which corresponds to 100 mg of vitamin C kg-1 diet based on data from this study.
    Description: Includes:- 4 tables.;1 fig.;6 plates.;32 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Fish culture ; Feeding experiments ; Vitamin C ; Growth rate
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    Investments and employment opportunities in the aquaculture sector in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23042 | 19325 | 2018-03-05 20:39:37 | 23042 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Nigeria is a large fish consuming nation with a total consumption at more than 1.2 million tonnes, with fish imports making up about two thirds (700,000 t) of the fish supply. Although the contribution of fisheries to the Gross Domestic Product is only 3-4%, it occupies a very significant position in the primary sector providing employment for over a million people (FDF Statistics) and contributing about 50% of the animal protein intake of the population, particularly the resource poor. The estimated national demand for fish is estimated as high as 1.3 million metric tons with a wholesale value of more than $US 1 billion. Of this, the Federal Department of fisheries (FDF) estimated 511,000 tones are provided domestically or only about one third of demand, with an estimated per capita fish consumption ranging from 7.5-12 kg. With the current policy thrust towards fisheries development, there is excitement among stakeholders in private sector fish farming as shown by the expansion and renovation of existing farms and investments in few fish farms and hatcheries. This has brought the industry to a retail production value of N180 million. This development is not however without some challenges. Fish producers have rushed ahead with the production without support of a developed values chain. This gap is providing an entry point for interventions to greatly facilitate expansion of services in the value chain for this exciting industry. This paper therefore seeks to provide guidance on how to strategically focus aquaculture activities to capitalise on opportunities for increased employment and incomes.
    Description: Includes:- 1 table.;2 figs.;6 refs.
    Keywords: Aquaculture ; Nigeria ; Employment opportunities ; freshwater environment ; Investments ; Personnel ; Human resources ; Fish culture
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    Composition and abundance of macro-invertebrate community in earthen ponds of Akscoa Fish Farm Oruk Anam L.G.A., Akwa Ibom State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23045 | 19325 | 2018-03-06 15:23:21 | 23045 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Composition and abundance of macro-invertebrates, in Akwa Ibom State College of Agriculture, Fish Farm in UrukAnam Local Government Area, Nigeria, was studied from (December 2005 to May, 2006). Collections of samples were made with benthic net at weekly intervals. Stocked and unstocked ponds were selected for the study. The stocked ponds had 122 individuals macro invertebrates while unstocked pond had 160 number of individuals. The two ponds were dominated by Diptera followed by Coleoptera with single individual species. Groups which are regarded as clean water fauna were absent in both ponds. Generally, the ponds were poor in terms of number of taxa and individuals.
    Description: Includes:- 2 tables.;8 refs.
    Keywords: Aquaculture ; Ecology ; Nigeria ; Akscoa Fish Farm ; Macroinvertebrate ; freshwater environment ; Abundance ; Composition ; Microorganisms ; Microbiology ; Freshwater ecology
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    The length weight relationship and condition factor of the Banded Jewel fish (Hemichromis fasciatus Peters) from Kainji Lake, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23214 | 19325 | 2018-03-25 12:46:05 | 23214 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The length weight relationship and condition factor of Hemichromis fasciatus from Kainji Lake was studied. One hundred and twenty seven fish samples of total length ranging from 6.50cm 15.50cm and weigh between 4.00g and 60.00g collected between August 2006 and June 2007 were analyzed. Results showed that a, b and r - values were 0.0042, 3.442 and 0.966 respectively, while the condition factor (CF) values varied from 0.67 2.42 with mean of 1.203. The fish exhibited positive allometric growth pattern. The condition of the lake is favourable for the survival of the fish species.
    Description: Includes:- 2 tables.;1 fig.;15 refs.
    Keywords: Ecology ; Fisheries ; Hemichromis fasciatus ; Nigeria ; kainji L. ; freshwater environment ; Length-weight relationships ; Condition factor
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    Diseases associated with livestock integrated fish farming in Nigeria: a review (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23215 | 19325 | 2018-03-17 12:47:49 | 23215 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Just like other animals and humans, fishes are prone to diseases and predation. Diseases can be caused by one and/or combination of any of the following agents e.g. bacteria, fungi, viruses and parasites. Diseases have become a primary constraint to aquacultural development, which may affect the achievement of a desired impact for rapid development of fish culture in Nigeria. Apart from causing mortalities, they also cause loss of production quality, reduced growth, reduced fecundity, loss due to control measures and loss due to social factors associated with the farmer. This review has discussed the diseases that are associated with integrated fish farming including livestock cum fish farming, poultry-cum fish farming, Waste water fish farming, rice-cum fish farming e.t.c. The control of diseases associated with integrated fish farming requires a multi-disciplinary approach including chemotherapy, sanitation, routine hygiene, quarantine, genetic selection and immunoprophylaxis. The treatment and prevention of fish diseases follow the same principles used in chemotherapy of higher animals.
    Description: Includes:- 4 tables.;9 refs.
    Keywords: Agriculture ; Aquaculture ; Nigeria ; freshwater environment ; Fish culture ; Diseases ; Bacteria
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    Capacity building and training requirement for effective fisheries and aquaculture extension in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23216 | 19325 | 2018-03-17 12:51:36 | 23216 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper examines the importance of capacity building and training requirement for the benefit of fisheries and aquaculture extension in Nigeria. It involves the analysis of secondary data bothering on the management of agricultural extension in Nigeria over time vis-avis various agricultural development programmes in the past in which fisheries and aquaculture extension was apparently de-emphasized in favour of crop and livestock agriculture. It is therefore recommended as a way forward that a favorable reform in the Nigerian agricultural extension system will be a necessary avenue to put fisheries and aquaculture extension in proper perspective for effective service delivery which will be a good entry point to achieving the millennium development goals of combating hunger, extreme poverty and attainment of food security in Nigeria.
    Description: Includes:-7 refs.
    Keywords: Aquaculture ; Fisheries ; Information Management ; Nigeria ; Extension services ; freshwater environment ; Technology transfer ; Training ; Education ; Sociological aspects
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    Women in fisheries: a case study of the Kainji Lake Basin, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23222 | 19325 | 2018-03-18 13:52:04 | 23222 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The study examined the contribution of women to fisheries in Kainji Lake Basin, Nigeria. The sample size of 80 respondents was selected through a purposive sampling in ten (10) fishing villages around Kainji Lake Basin. Instrument for data collection was semi- structured questionnaire. Data was analyzed using descriptive statistic. The result showed that the women are mostly engaged in processing, marketing and financing. About 60 percent of the women interviewed are engaged in marketing and financing. Ten (10) percent of the respondents are engaged in financing. The low participation in financing is attributed to high amount of capital involved. It is recommended that women should be made to benefit more from rural development policies and programmes.
    Description: Includes:- 2 tables.;1 fig.;7 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Kainji L. ; freshwater environment ; Women ; Fisheries
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    Proximate composition and amino acids profile of smoked catfish Clarias gariepinus and tilapia Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23226 | 19325 | 2018-03-18 14:51:17 | 23226 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The proximate composition and amino acids assay of smoked Clarias gariepinus and Oreochromis niloticus were determined using standard procedures. The mean proximate composition of Oreochromis niloticus are 8.9% moisture, 16.00% lipids, 5.6% ash, 44.5% crude protein, 0.42% crude fiber and 24.9% NFE while Clarias gariepinus has 8.19% moisture, 15.55% lipids, 4.725 ash, 40.46% crude protein, 0.50% crude fiber and 30.58% NFE. There is therefore a nutrient variation between the 2 species of fish Oreochromis niloticus has higher crude protein, lipids, moisture and ash content than Clarias gariepinus.The amino acids profile shows that both fishes have 17 amino acids. Apart from Tryptophan, the following essential amino acids Histidine, Methionine, Threonine, Isoleucine, Leucine, Lysine, Valine and Phenylalanine are present in both fish. Oreochromis niloticus however has higher quantities of the essential amino acids except for Histidine than Clarias gariepinus
    Description: Includes:- 2 tables.;2 figs.;7 refs.
    Keywords: Chemistry ; Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Amino acids ; Ash content ; Lipids ; Organic compounds ; Moisture ; Proteins
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    A comparative analysis of the food and feeding habits of African lungfish (Protopterus annectens, Owen) in River Rima and Goronyo Dam North Western Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23232 | 19325 | 2018-03-18 13:49:50 | 23232 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The food and feeding habits of Protopterus annectens of the River Rima and Goronyo Dam in North Western Nigeria was studied. A total of one hundred and eighteen (118) fish samples were collected from October, 2001 to September, 2002 and the stomach contents were analyzed using frequency of occurrence method. The feeding adaptation with respect to mouth and related structures, gill rakers and dentition were examined. The gut length and fish length indicated rectilinear positive relationship. The regression coefficient (b) and correlation coefficient (r) of GL TL relationships were highly significant (p〈0. 01). The main taxa of food substances found in the stomachs included substances of plant and animal origins, with overall frequency of 49. 1and 38.3% for the samples from River Rima and 27.2 and 60.3% for those from Goronyo Dam in the same order. The results of percentage occurrence of the food items in the dry season showed that animal substances in the juveniles (51.7%) and the adults (41.4%) were higher than the plant materials in the samples from the two water bodies. In the rainy season, the percentage occurrences of animal substances were higher in the adults (= 30cm) samples from Goronyo Dam than those samples from River Rima, while the same food items were absent in the juveniles (= 30cm) from the two water bodies. These feeding adaptive features indicate the roles of the species in their ecological niche and provide base line information that could be useful in satisfying their food requirement under culture condition. The diversity of food substances found in the stomach and their occurrence in the juveniles and adults varied with the water bodies and season.
    Description: Includes:- 5 tables.;19 refs.
    Keywords: Ecology ; Fisheries ; Protopterus annectens ; Nigeria ; Rima R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Feeding behaviour ; Feeding ; Food chains ; Food preferences
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    An appraisal of the traditional fish handling and processing methods in Lake Chad (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23218 | 19325 | 2018-03-18 13:40:29 | 23218 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The paper reviews the various techniques of fish handling and processing in Lake Chad. Poor handling of fish catches on board coupled with the distant location of the fishing grounds and thick aquatic vegetation on the lake which hamper fast movement of catches to the processing centers are the bane of good quality fresh fish getting to the processors. The techniques adopted in processing and preservation are mainly smoking, char-burning and sun drying. Defects suffered by the processed products of the methods include high moisture content, heavy insect infestation, bacterial decomposition and fungal attack. Protection of catches from direct sunlight by spreading wet jutes over them will lower the rate of deterioration. Removal of the aquatic vegetation by appropriate authorities and canalization will ease movement of fish catches to the processing centers. More serious enlightenment of the processors on the adoption of the 'Chorkor' oven will reduce the problems presently facing cured fish. The use of rambo insecticide and other dangerous chemicals by the fish processors and marketers for the preservation of fish products before repackaging should be discouraged.
    Description: Includes:- 1 table.;43 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Fish handling ; Handling ; Processing fishery products ; Curing
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    Design of double chine flat bottom fishing canoe for lake fishery (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23217 | 19325 | 2018-03-18 13:38:58 | 23217 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: A 7.0 meters Length Overall (LOA) flat bottom canoe similar to the one commonly used for fishing in Kainji lake, but with some modifications, was designed. The improvements/modifications over the local canoe include, an additional chine to reduce the flatness of the bottom which was absent in the local canoes commonly used. The canoe's light displacement (weight empty) was 0.48 Tonne, which was similar to local canoe of same size. The draft obtained was 0.13 M( 13cm), which is 36.9% of its depth (0.48 M). The capacity of the canoe was 1.304 tones. The water plane area (WPA) was 3.89 M2; WPA coefficient, and block coefficient were 0.83, and 0.82 respectively. The modification on the canoe resulted in provision of a canoe with the bottom shaped close to V-bottom to aid better performance on rough turbulent water such as the Kainji Lake, and increased life span of canoe and safety of fisher folk while aboard fishing.
    Description: Includes:- 1 table.;7 figs.;7 appendix
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Boats ; Design ; Fishing vessels
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    Strengthening fisheries extension under the Unified Agricultural Extension System (UAES) policy towards sustainable fisheries development in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23221 | 19325 | 2018-03-18 13:47:06 | 23221 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The paper examines the prospect and constraints of fisheries extension under the unification policy. It revealed certain barriers influencing its fullest utilization as well as fisher folks participation in extension programmes. Some of the barriers identified are related to inaccessibility, logistic support, improper aquaculture methodology, insufficient applied research in small scale fisheries, inability to convert research findings into positive results by small scale fisheries, inadequate number of fisheries research personnel within the existing research centers and institutes catering for the fishers sector, complexity of issues, lack of coordination and continuity in research and data deficiencies in small scale fisheries. Based on the findings, the paper recommends that, the effectiveness of the methods of identifying research needs by practitioners be assessed, the impact of the generated research results in reducing or solving field problems be ascertained, the constraints to diffusion of proven technologies from research being integrated into small scale fisheries be evaluated, the degree of effectiveness of extension delivery tools on .fishers technology adoption be ascertained, and lastly, adequate applied research in small scale fishery be emphasized.
    Description: Includes:-8 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; Extension services ; freshwater environment ; Technology transfer ; Education
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    Comparison of microbial load and proximate analysis of fresh lean fish Labeo coubie and fresh fatty fish Synodontis membranaceus with their smoked products (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23224 | 19325 | 2018-03-18 13:56:36 | 23224 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Comparative study on the microbial load and proximate composition of fresh lean fish Labeo cubie and fresh fatty fish Synodontis membranaceus with their smoked products were carried out. The colony count of different parts was carried out on all the samples and the results show the highest microbial load on the gut of both the fresh lean fish and the fresh fatty fish. The smoked dried lean fish and the smoked dry fatty fish had lower microbial counts compared to their fresh samples because smoking reduces the microbial load on fish. Biochemical characterization carried out on all isolates confirmed Gram-negative bacterial isolates. The proximate composition show that water is the most affected nutrient during the hot smoking of both the fresh fish sample and the fresh fatty sample with a corresponding increase in protein content. There was a significant difference (p〈 0.05) in proximate composition of smoked product of fresh fatty fish and the fresh lean fish. The colony counts of different parts of the fish reveals that majority of the microorganisms is found in the guts followed by gills and the lowest in the skin this is the pattern in the two fresh fish but for smoked fish the gut is usually removed before smoking.
    Description: Includes:- 4tables;9 refs.
    Keywords: Fisheries ; Labeo coubie ; Synodontis membranaceus ; Nigeria ; freshwater environment ; Microbial contamination ; Microbiological analysis ; Fishery products
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    Problems and prospects of fish culture in Mubi, Adamawa State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23225 | 19325 | 2018-03-18 14:49:23 | 23225 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper reviewed the major problems of fish pond culture in Mubi.The prospects for fish pond are highlighted and a call to awaken people initiatives in Mubi region to invest in fish farming is made so that the nutritional and economic status of the people of the region might be improved through aquaculture. Some of the problems identified are: lack of knowledge of the biology of culturable species, none availability of fish feed, none availability of fish seed and the peculiarity of the weather most expecially the very cold season when the temperature can be as low as 18~'C.
    Description: Includes:- 12 refs.
    Keywords: Aquaculture ; Nigeria ; Mubi ; freshwater environment ; Fish culture ; Freshwater aquaculture
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    Determination of intestine length to standard length ratio of some fishes from Ikpoba River and Ovia River, Nigeria with a review of culture of Parachanna obscura (Pisces:Channidae) (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23229 | 19325 | 2018-03-18 14:58:27 | 23229 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The gut length to standard length ratios of twelve fish species from the Ovia and Ikpoba Rivers were calculated to work out their feeding level in the food chain. The mean ratio of five species Brycinus macrolepidotus Smith, 0.9 Parachanna obscura (Gunther), 1.0, Papyrocranus afer. Gunthel; 0.35, and Xenomystus nigri Gunther 0.75, classify them as carnivores. Four species Synodontis eupterus Boulenger; 4.4 S.schall (Bloch and Schneider) 4.8, Tilapia mariae Boulenger, 3.5, and T. tilli (Gervais), 4.7, are herbivores. Three intermediate ratio species B. longipinnis (Gunther), 1.3,Chrysichthys furcatus (Gunther) 1.6, and Clenopoma kingsleyae Gunther, 1.8, are omnivores. The body depth of seven of the species was measured and expressed as percentage of the standard length to ascertain the accommodative capacity of the fish for the gut. In addition a review of culture of snake head fish Parachanna obscura is presented.
    Description: Includes:- 3 tables.;18 refs.
    Keywords: Aquaculture ; Ecology ; Parachanna obscura ; Nigeria ; Ikpoba R. ; Nigeria ; Ovia R. ; freshwater environment ; Fishery biology ; Length ; Ratios
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    Case studies on HIV/AIDS in fisheries development: lessons for Nigerian fisheries (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23230 | 19325 | 2018-03-18 15:00:41 | 23230 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper reviews accounts of social and economic features of HIV/AIDS epidemics in the fisheries sector focussing on Africa with particular reference to Nigeria. Fishing communities are often among the highest-risk group, with high overall rates of HIV/ AIDS prevalence. It is more important to use the information made available from these efforts in more effective way of targeting the appropriate interventions and measures that can be designed and instituted. This information could also serve useful purposes and the efficient mobilization of needed resources from all possible sources in order to achieve the Millennium Development Goals in the Fisheries sector in Nigeria.
    Description: Includes:- 31 refs.
    Keywords: Conservation ; Health ; Nigeria ; HIV/AIDS ; freshwater environment ; Public health ; Human diseases
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    Analysis of containers used by fishermen at Lake Alau community in Konduga Local Government Area of Borno State, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23238 | 19325 | 2018-03-18 15:18:15 | 23238 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Good handling of fish from the point of harvest to consumption is very essential and the quality of fish can only be maintained if only suitable containers are used in its processing, transportation, distribution and marketing. This study analyzed the different containers used by fishermen at lake Alau community in Konduga Local Government Area of Bomo State. The study was carried out in two prominent leading sites of lake Alau community which are kachalari and Abbari with the aid of questionnaires interview conducted with 50 randomly selected respondents fishermen. Both primary and secondary data were collected. The collected data were analyzed using the market cost of the various fish containers. The result shows that fish containers such as Metal basin, sacks, flat sacks and Metal trays have strong strength while Baskets, jerry cans and calabash have moderate strength the polythene bags, stationery and news print are very weak. Also baskets have the highest percentage of usage 20% while flat sacks, polythene bags and stationery have the highest percentage of 4%, which are the lowest. It can be concluded that, the different containers are afforded to fishermen but most of the containers are often kept dirty, which lead to poor hygiene, rough handling and invariably post-harvest losses and shortage in food supply. It can be recommended that, sheds should be provided at the landing sites to protect fresh fish the direct heat of the sun and enlightment of fishermen and traders on the minimum standard o fthe quality and hygiene for fish and fishery products.
    Description: Includes:- 4 tables;6 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Alau L. ; freshwater environment ; Containers ; Fishery products
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    The genetic characteristics of cephalic abnormality and its aquaculture implication in Clarias gariepinus (Burchell 1822) (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23241 | 19325 | 2018-03-18 15:26:11 | 23241 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Cephalic abnormality in nine mating groups involving Clarias gariepinus with cephalic abnormality, non Cephalic and Maiduguri origin were investigated to determine the level and the genetic basis of the occurrences and its aquaculture implication. The highest mean percentage survival in a Cephalic crossed with non cephalic group was 68.6% whereas the last mean percentage survival was 25.7% in the group of Maiduguri cross with Maiduguri parent. Cephalic abnormality was observed in the crosses with both female and male cephalic with a total frequency ranging from 0 % to 70.8. %. The least number of cephalic abnormality was 18.5% which involved a cross of non cephalic with cephalic, and the highest was 70.8%. This level of cephalic abnormality shows that the defect was hereditary. This result implies that, the genetic factor is a major contributor in the feature of cephalic abnormality in Clarias gariepinus.
    Description: Includes:-1 table.;3 appendixes.;11 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Diseases ; Deformation ; Fish culture ; Genetics ; Abnormalities ; Genetic abnormalities
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    Bacteriological quality of water and fish samples from Kainji Lake and the effect of animal and human activities (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23242 | 19325 | 2018-03-25 12:34:41 | 23242 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Kainji Lake is a man-made Lake and is impounded in 1968 to generate hydroelectric power. The Lake also offers opportunities for developmental projects like Fisheries and Irrigation. Lake Kainji receives organic waste through husbandry operations in which the cattle defecate into and around the bank of the Lake. Other sources of pollution include runoff from farms, bathing and washings in the Lake. Surrounding villages e.g. Tarda and Musawa used the Lake as source of raw drinking water and also for other domestic purposes. Bacteriological quality of fish and water from the Lake is carried out as well as that of cow dung by using primary isolation media and biochemical analysis. Physico-chemical parameters of water from the Lake is also determined. Total viable bacteria count and total coliform count of the water range from 3.4 x 104 to 03.8x 106 Cfu/ml and 1.4 x 103to 2.1 x 105Cfu/ml respectively. Cow dung has total coliform count of 6.9 x 105 while fish gills has total coliform count of 1.6x103cfu/g. Bacteria species such as Escherichia coli, Salmonella typhi, Aeromanas hydrophila, and shigella species were found in the water body. Escherichia coli, Aeromonas hydrophila, and Salmonella species were found in the fish samples. Escherichia coli, Aeromonas hydrophila, Shigella species and Salmonella species were isolated from cow dung. Physicochemical Parameters such as DO, BOD and N03-N range from 4. 7 to 5.2mg/l, 0.2 to 0.9mg/1 and 7.0 to 9.3 mg/l respectively. This result shows that Kainji Lake is an intermediately polluted water. It is therefore necessary that cow dung used for fertilization of fish ponds should be screened for pathogens before use. It is also recommended that pollution of surface water bodies through human activities should be discourage by legislation on water pollution.
    Description: Includes:- 6 tables.;14 refs.
    Keywords: Biology ; Fisheries ; Pollution ; Nigeria ; Kainji L. ; freshwater environment ; Bacteriology ; Water quality ; Environmental effects ; Pollution
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    Socio-economic factors influencing aquaculture development in Sokoto State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23243 | 19325 | 2018-03-25 12:36:45 | 23243 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The study was carried out in five local Government Areas namely Sokoto North, Bodinga, Kware, Ilila and Tambuwal mapped out by International Fund for Agricultural Development as fishery potential areas. Seven villages namely Gidan Igwai, Kaurar Kwasau, Gidan Akwara, Tozai, Tambuwal, Mogajin Gari, and Badau also were selected all at random. Fish farm management questionnaire was used for data collection. Results revealed that adequate fish farm facilities, fish seed supply, private sector confidence and support, risk consderation, government support and investment, over popularized livestock poultry sub sector and fishery extension service are the problems of fish farming. Recommendations were made as to how to improve fish farming in Sokoto State.
    Description: Includes:- 17 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Sokoto State ; freshwater environment ; Socioeconomic aspects ; Aquaculture ; Aquaculture development
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    Elemental concentration and size relationship in African cuttlefish Sepia bertheloti, from the coastal waters of Qua Iboe River, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23249 | 19325 | 2018-03-25 14:29:19 | 23249 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Ten specimens of African cuttlefish, Sepia bertheloti, from the coastal waters off Qua Iboe River, Southeast Nigeria, were analyzed for the relationship between the concentration of the elements and the size of the species. Energy Dispersive X-ray fluorescence technique was employed to determine the elemental composition of the species. Eleven elements were identified in the body of cuttlefish. These were Chlorine, Strontium, Potassium, Calcium, Bromine, Iron, Copper, Zinc, Manganese, Nickel and Selenium of these elements, the concentration of calcium, potassium. Copper and strontium had a positive correlation with the weight, while the concentrations of manganese, nickel, chlorine, iron were negatively correlated with their weights. However, only manganese had a significantly negative correlation (p〈0. 05). Bromine and zinc had no correlation with the weights of the species. There also existed a significant positive correlation between Ca and K, Se and Ni, Cu, Br and Zn and St and K. We conclude that African cuttlefish, irrespective of size is a rich source of nutritional elements and is especially recommended for pregnant women and for all age groups.
    Description: Includes:- 2 figs.;9 refs.
    Keywords: Fisheries ; Sepia bertheloti ; ASE ; Nigeria ; Gulf of Guinea ; Nigeria ; Qua Iboe R. ; freshwater environment ; marine environment ; Nutritional requirements ; Potassium ; Nutrition
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    Women participation in fisheries in some fishing communities in Sokoto, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23246 | 19325 | 2018-03-25 12:43:59 | 23246 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This study set out to investigate the participation of women in fisheries in some fishing communities in Wamakko Local Government Area of Sokoto state. It succeeded in establishing the fact that women are active though to some extent in fisheries in this area. This is as a result of the prevailing socio-cultural, as well as religious set up which revolves round task sharing. It however highlighted the fact that women's contribution in the fisheries sub-sector is necessary to improve their livelihood and by so doing, to directly help households.
    Description: Includes:- 8 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Sokoto ; freshwater environment ; Women ; Fisheries ; Fishery resources
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    Acute toxicity and behavioural effects of chlorpyrifosethyl pesticide to juveniles of Clarias gariepinus Teugels (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23253 | 19325 | 2018-03-25 14:37:19 | 23253 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Chlorpyrifos-ethyl with its mode of action was evaluated in laboratory studies to determine its 96-h acute toxicity, using juveniles of Clarias gariepinus. The fish was exposed in glass aquaria to 0.64~cmg/l, 0.80mg/l, 0.96mg/l, 1.12mg/1 and 1. 28mg/1. The test substance was found to have lethal effects on fish as they changed fish behaviour and caused death. The 96-hLC50 value for C. gariepinus was estimated as 0.92mgl-1. Observations of be bavioural and mophlogical responses were used as indicators of sublethal toxicity. The behavioural toxicology bioassay may be valuable in comparing and predicting the mode of action of new or unknown toxicants in this and other fish species.
    Description: Includes:- 1 table.;1 fig.;2 plates.;38 refs
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; freshwater environment ; Toxicity ; Toxicants ; Pollution ; Lethal effects
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    Indigenous knowledge system in fisheries: a review (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23260 | 19325 | 2018-03-25 14:50:35 | 23260 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Scientists and researchers agree that developmental projects should have impact on the targeted groups. In this context a review was made on the indigenous knowledge system in fishery with a view to elucidating the indispensability of the system due to the increasing acceptance globally. The importance of the system and the factors militating against it where shown. The relationship between fisheries science and the fisher's knowledge was also discussed. Some indigenous practices as well as equipment used by different people were cited. It was concluded that local knowledge of the environment and resources used, as well as the society within which the resultant goods and benefits are distributed is fundamental to the continuity of sound community based management practices. Recommendation was made for research to be conducted in every facet of fishery traditional system with a view to fusing the two; the indigenous and scientific to complement each another.
    Description: Includes:- 23 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; Information Sources ; Indigenous knowledge ; freshwater environment ; Fishery management ; Stock assessment
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    Study on the effect of two construction materials on the efficiency of fisheries aggregating devices (FADs) in Lake Kainji Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23259 | 19325 | 2018-03-25 14:49:05 | 23259 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish Aggregating Devices (FADs) were experimented in Lake Kainji using worn out automobile lyres and cement blocks for a period of 12 weeks. Six tyres and blocks were tied together separately in 3 replicates and randomly suspended in the lake at a depth of 2 metre and 50 meter interval. After 8 weeks of suspension, a fleet of gillnets with 76mm mesh size and hung at E-value 0.5 were zigzag set across the suspended FADs for 12 fishing periods with 13 hrs soak time (~c1.0268.D.) per period The trial showed that the cement block FADs attracted more fish (70% of the total fish caught) belonging to 6 different species. The lyres FADs attracted only 3 species of fish constituting some 30% of the total fish caught Citharinus citharus dominated the catch of the block FADs constituting 52.3% of the total catch, while Oreochromis niloticus was 46.4% of the tyre FADs. The Horizontal Enhanced Fishing Zone (EFZ) was found to be between 5 to 12 metres from the location of the FADs. There was significant different (P〈0.05) in the catches of the two FADs.
    Description: Includes:-14 refs,;1 table,;3 figs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fishing gear ; Gear construction ; Gear materials ; Gear research
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    Some soil nutrient composition favouring the growth of Typha grass in Kebbi and Katsina States, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23276 | 19325 | 2018-03-28 15:48:40 | 23276 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This study was carried out by surveying all the water bodies of two states where Typha grass exists. Soil auger was used to take soil samples randomly from five different locations in both Kebbi and Katsina state at the depths of 0-5cm, 510cm, 10 15cm. Soil nutrient was analyzed for the mineral composition of the two States at different season and soil depths. The result showed that, soil depth between 5-10cm has the highest percentage of nitrogen, phosphorus, calcium and magnesium during dry season. The nutrient composition of soil from the two states followed the same pattern during wet season.
    Description: Includes:- 4 figs.;9 refs.
    Keywords: Earth Sciences ; Ecology ; Nigeria ; Kebbi State ; Nigeria ; Katsina State ; Soil nutrient ; freshwater environment ; Soils ; Nutrients (mineral) ; Growth ; Aquatic plants
    Repository Name: AquaDocs
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    Use of baobab pulp as a source of vitamin C in the diet of Nile tilapia, Oreochromis niloticus fingerlings (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23277 | 19325 | 2018-03-28 15:50:01 | 23277 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Sixteen (16) weeks feeding trial in a randomized design with three replicates was conducted to study the response of 180 Oreochromis niloticus fingerlings to baobab pulp as a source of vitamin C. They were fed a basal diet without supplemental vitamin C in the first 2 weeks of conditioning to deplete some stored acrobate. Diets supplemented with 1008 mgascorbyl-2-monophosphate Mg2+ (AMP) kg-1 diet (diet 1); 84g baobab pulp kg-1 (diet 2) and 168g baobab pulp kg"1 diet (diet 3) were evaluated. There was no significant difference (P〉0.05) in terms of weight gain, feed efficiency ratio, protein efficiency ratio, specific growth rate and survival between the groups fed diets 1 and 3. There was a significant difference between the groups fed diet 2 and either of the other diets. Total ascorbate concentration of the liver was significantly (P〈0.05) higher in the groups fed diet 3. The crude protein content of the final fish was significantly (P〈0. 05) higher in the groups fed diet supplemented with AMP. Interestingly none of the groups exhibited the characteristic symptoms of vitamin C deficiency. The results of this experiment suggest that Oreochromis niloticus was able to obtain vitamin C from the baobab pulp and tend to recommend baobab pulp at a level not less than 168g kg-1 diet in the nutrition of Oreochromis niloticus based on the condition of this study.
    Description: Includes:- 3 tables.;1 fig.;19 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Vitamin C ; Diets ; Feeding experiments
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    Effect of baits on the efficiency of Malian traps in Lake Kainji (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23278 | 19325 | 2018-03-28 15:52:01 | 23278 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Studies on the effects of two fishing baits on the catch composition of Malian Traps in Lake Kainji were monitored. The Traps were set at Monia fishing village in the southern basin of the Lake Baited with boiled yam (Dioscorea rotundata) and fresh palm fruit (Elaeis guineensis) and were inspected twice daily for seven weeks. The fishes caught comprised of nine (9) species belonging to four (4) families. The result of analysis of variance of the biomass as well as number and percentages of fishes caught in the traps by the baits showed there was no significant difference (P〉0.05). However, both baits showed better efficiency for Tilapia zilli, Oreochromis niloticus and Hemichromis fasciatus than other species caught but trap baited with fresh palm fruit had better efficiency for Distichodus restratus and Alestes nurse. There was wide range between the minimum and the maximum size of species caught, which showed the efficiency of the traps capturing small size, juveniles and the adult of large fish species due to small mesh size (1'') net cover of the trap. Recommendations were made for better performance and profitable fishing of Malian traps.
    Description: Includes:- 4 tables.;11 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; Malian trap ; freshwater environment ; Fishing ; Bait ; Trap fishing
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    Carbohydrate utilization of Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23279 | 19325 | 2018-03-28 15:53:18 | 23279 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Oreochromis niloticus of mean weight 45.96~c0.06g were fed seven practical diets ranging from 8.77 to 33.77% carbohydrate in 56 days. Mean weight gain were not significantly different (P〉0.05) while mean daily gain and specific growth rate varied significantly (P〈0.05). The protein efficiency ratio did not follow any trend with the percentage protein fed. It was highest with fish fed 46.3% and lowest with fish fed 51.2%. There was no significant variation in the food conversion ratio. The results indicated that O. niloticus utilized 25.28% carbohydrate optimally among the diets fed. The requirement of the fish for carbohydrate in diet is 30%.
    Description: Includes:- 3 tables.;2 figs.;19 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Feeding experiments ; Nutrition ; Carbohydrates
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    Optimum temperature and stocking density for transportation of tilapia (Oreochromis niloticus) broodstock in the semi-arid zone of Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23280 | 19325 | 2018-03-28 15:54:31 | 23280 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Oreochromis niloticus broodstock of mean weight 32.3g were cropped in the morning with dragnet from a 1 ha reservoir and transported in round tanks to the Hatchery complex of the National Institute for Freshwater Fisheries Research where they were stocked into 5m x 5m indoor concrete tanks filled with clean water and with aerators at a density of 4 fish/m1. They were acclimated for 5 days and then packaged into 60 liter capacity water proof bags at the following stocking densities: 60, 80, 100, 120, 140 fish/60 lit bag. Each stocking density had bags with ice blocks and bags without ice blocks in triplicate. The water proof bags were oxygenated, loaded into quick fitting plastic bowls and transported in a bus from New Bussa to Warra, Kebbi state, a journey of 3 hours. The trip was repeated four times. Percentage survival in bags with ice block were 100%for stocking densities 60, 80, 100 fish/60 lit bag, 95.1%for 120 fish/60 lit bag and 84. 7%for 1-10 fish/60 lit bag (mean temperature 23.5~?C). Mortalities were recorded in all the bags without ice block but the highest survival was in the bag with stocking density 60fish/60 lit bag (mean temperature 29.2~?C).
    Description: includes:- 3 tables.;6 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Stocking density ; Transportation ; Fish culture
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    Influence of abattoir effluents on abundance of freshwater prawns Macrobrachium vollenhovenii, M. macrobrahion and M. felicinum of Lower Ogun River, Western Nigeria (2021)
    FISON | Kaduna
    In:  http://aquaticcommons.org/id/eprint/23281 | 19325 | 2018-03-28 15:57:48 | 23281 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The implications of the abattoir effluents discharge into the Lower Ogun River in Isheri-Olofin area on the abundance of three African fresh water prawns: Macrobrachium vollenhovenii, M macrobrachion and M. felicinum were assessed. Monthly prawn collections were undertaken using a scooping bag net with 0.05mm mesh size at three stations with 100m intervals in each of Ishasi (upstream) and Isheri-Olofin (downstream) areas of the river for 24months (January, 2006-December, 2007). For the 24month period, the upstream (pooled data from stations 1,2 and 3) had M. vollenhovenii of total and mean density of 27,938.33 prawn/m2 and 1164.60prawn/m2 1131.04 respectively, while total and mean M. vollenhovenii density of 5,815.43prawn/m2 and 243.81 prawn/m2 231.45 were obtained in the downstream (pooled stations 4, Sand 6 data). T-test showed the entire upstream to have significantly higher M. vollenhovenii density than the entire downstream (p〈0.05). The entire upstream had higher M. macrobrachium total and monthly mean density (19,092prawn/m and 816.44prawn/m2 1,354.28) than the entire downstream (6,384.47prwn/m2 and 266.02m2524.94) (p〈0.05). Also, significantly higher total and monthly mean density of M felicinum were obtained upstream (20,9S6.S0prawn/m2 and 873.46prawn/m21615.06) than downstream (10,9668.11prawn/m2 and 461.16prawn/m2975.19) (p〈0.05). The significance of the decline in abundance of each of the three Macrobrachium prawn species in the downstream area was discussed.
    Description: Includes:- 4 figs.;18 refs.
    Keywords: Biology ; Ecology ; Macrobrachium vollenhovenii ; Macrobrachium macrobrachion ; Macrobrachium felicinum ; Nigeria ; Ogun River ; freshwater environment ; Abundance ; Population density ; Shrimp fisheries ; Pollution ; Pollution effects ; Effluents
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    The impact of meteorological parameters on fish weight loss in the Kainji Solar Tent Dryer (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23285 | 19325 | 2018-03-28 16:10:49 | 23285 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Metrological parameters and their impacts on weight loss of fish inside Kainji Solar Tent Dryer were experimentally investigated. Drying experiments were conducted in solar dryer across the five agro ecological zones of Nigeria. During the drying experiments, the parameters such as temperature, relative humidity were lowest. The study showed that meteorological parameters were the primary determinants for fish drying within the Kainji Solar Tent Dryer, since weight loss during the experiment followed the pattern of these parameters
    Description: Includes:- 2 tables.;2 figs.;5 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Processing fishery products ; Drying ; Solar power
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    Population dynamics of periwinkle Tympanotonus fuscatus var fuscatus (Linnaeus, 1758) in the Bonny Estuary, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23289 | 19325 | 2018-03-30 14:45:43 | 23289 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The growth, mortality and recruitment pattern of Tympanotonus fuscatus var fuscatus were investigated using shell length (SL) - frequency data obtained from the mangrove swamps of the Bonny River, population. Computer based software package FiSAT (FAO - ICLARM Fish Stock Assessment tool) were used for the analysis. Sampling was done between January to December, 2004. Results obtained showed relatively high growth, low mortality and recruitment pattern with two peaks annually.
    Description: Includes:- 2 tables.;1 fig.;11 refs.
    Keywords: Ecology ; Fisheries ; Tympanotonus fuscatus var fuscatus ; Nigeria ; Bonny Estuary ; freshwater environment ; Population dynamics ; Growth rate ; Mortality ; Recruitment
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    Sediment quality of lower reaches of Okpoka Creek, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23283 | 19325 | 2018-03-28 16:00:48 | 23283 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The sediment is the ultimate sink of contaminants in the aquatic systems. The physico-chemical quality of sediments lower reaches of Okpoka Creek was assessed for two years (wet and dry lsons).Sediment samples were collected at low and high tides from three stations according to standard methods. These were analysed for sediment particle size (sand, silt and clay), pH, total hydrocarbon (THC), total organic matter (TOM), total organic carbon (TOC) and conductivity. Analysis of variance (ANOVA), Duncan multiple range (DMR) and Pearson correlation cofficient were used to analyse the data. The sediment consisted of sand (57.86 ~c2.65%); silt 17.47~c1.68%) and clay (24.67~c1.33%). Sediment particle size showed significant spatial variation (p〈 0.05).The sediment values pH (5.22~c0.27) and THC (0.24 ~c0.05g/g) were low unlike TOM (2.42~c0.26%), TOC (1.43~c0.17%) and conductivity (5077.61~c 847.88s/cm).The TOM and TOC values exceeded FEPA and USEPA acceptable levels in sediments. The presence high levels of TOM and TOC indicate organic pollution in the lower reaches of Okpoka Creek. Therefore, environmental surveillance of these parts of the creek is advocated.
    Description: Includes:- 2 tables.;1 fig.;12 refs.
    Keywords: Earth Sciences ; Pollution ; Nigeria ; Okpoka Creek ; freshwater environment ; Sediment analysis ; Sediments ; Sediment chemistry ; Sediment load ; Pollution
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    The length-weight relationship and condition factor of Citharinus citharus citharus in Lake Kainji, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23314 | 19325 | 2018-03-30 15:25:47 | 23314 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The length - weight relationship and condition factor of Citharinus citharus citharus was studied for a period of twelve (12) months from Lake Kainji, Nigeria. Nine hundred and eighty nine (989) fish samples (Citharinus citharus citharus) with total length ranging from 100mm to 530mm and weight ranging from 31.00g to 2250.00g were analysed. The results showed that the values of a, b and r were 0.0039, 3.2134 and 0.8997 respectively. The condition factor(K) values varied from 2.9 to 4.5, which means that the growth pattern of the fish is based on the value of 'a'. the fish species are also living well in the Lake as the 'K' are greater than one.
    Description: Includes:- 2 tables.;9 refs.
    Keywords: Ecology ; Fisheries ; Citharinus citharus citharus ; Nigeria ; kainji L. ; freshwater environment ; Condition factor ; Length-weight relationships
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    Clinical changes observed in Clarias gariepinus (Burchell 1822) fed varying levels of ascorbic acid supplemented diets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23328 | 19325 | 2018-04-06 16:06:27 | 23328 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study was undertaken to observe the clinical changes associated with the dietary ascorbic acid supplementation in the diet of African catfish, Clarias gariepinus, using the presence or absence of scorbutic (ascorbic acid deficiency) symptoms as indices. Clarias gariepinus fingerlings (6.02~c 04g) were randomly distributed into glass tanks of 60 x 45 x 45cm3 dimension at ten fish per tank in a triplicate treatment. Five diets containing 40% crude protein was formulated. Ascorbic acid (AA) was supplemented in the diets as ascorbyl-2-polyphosphate (a mixture of phosphate esters of ascorbate). Each treatment had varying levels of ascorbic acid (AA) supplementation, at 0 (Control) 50, 100, 150 and 200mg AA/kg, in Treatments 1, 2, 3, 4 and 5 respectively. Fish were fed practical diets twice daily at 900hrs and 1600hrs. Weekly weighing of fish was done and data collected were subjected to statistical analysis. At the end of week 4, fish fed scorbutic diets (diets without Ascorbic acid) had significantly lower weight than fish fed AA supplemented diets (P〈0.05). After week 6, fish fed scorbutic diet began to develop clinical symptoms including lordosis (lateral curvature), broken skull, pigmentation and scoliosis (vertical curvature). Radiographs confirmed defects in the vertebral columns of fish in this treatment. Highest mortality was recorded in this treatment as 30%, In all parameters considered, treatment 4 fed 150mg AA/kg gave the best AA supplementation that prevented growth reduction and clinical signs of AA deficiency.
    Description: Includes:-3 tables.;11 plates.;17 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Feeding experiments ; Fish culture
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    Study of ichthyofauna of Daberam Reservoir, Katsina State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23327 | 19325 | 2018-04-06 16:05:03 | 23327 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Research was carried out to explore the fish species diversity and study some aspects of the biology of fish of Daberam reservoir, Katsina state, Nigeria, for a period of three month from March to May 2009. Samples were collected from commercial fishermen and experimental fishing gears, preserved in formalin and taken to laboratory for identification; confirmation was done by fisheries experts. Eight genus comprising ten species were identified. The regression coefficient (b) was 3.07, 2.91 and 3.21 for the three most commercially importance species in the reservoir i.e. Oreochromis niloticus, and Clarias gariepinus respectively which indicated Positive allometric growth for O. niloticus and C. gariepinus and negative allometric growth for T. nilotica. The mean condition factor (k) was 1.140, with values of 1.027and 0.732 for O. niloticus and C. gariepinus, respectively. This indicates that the fish are not leaving well compared to other freshwater fishes.
    Description: 18 refs.
    Keywords: Ecology ; Fisheries ; Oreochromis niloticus ; Clarias gariepinus ; Nigeria ; Daberam Reservoir ; freshwater environment ; Fishery biology ; Biodiversity ; Species diversity ; Length-weight relationships ; Condition factor
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    Investment and employment potentials in fish farming in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23330 | 19325 | 2018-04-06 16:09:38 | 23330 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Investment opportunities in aquaculture that could lead to creation of employment in Nigeria was reviewed. Nigeria is a large fish consuming nation with the resource capacity to produce large quantity of fish for the country. The level of unemployment rate is increasing at an alarming rate. Employment opportunities in Agriculture sectors, in the area of Aquaculture deals with several sub sectors such as; seed production, transportation of live fish ,Water quality management, ornamental fish industries, supplies to aquaculture equipment and tools, aquaculture extension service, fish feed, fish meal production, fish processing, integrated rice-cum fish culture, and fish farm labor. These are all investment opportunities that can reduce unemployment, increase food security and poverty alleviation In Nigeria.
    Description: Includes:- 11 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Fish culture ; Investments
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    Food and feeding habit of Tympanotonus fuscatus var fuscatus (Linnaeus, 1758) in the mangrove swamps of the Bonny River, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23324 | 19325 | 2018-04-06 16:00:32 | 23324 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Studies on the food and feeding habit of T. fuscatus var fuscatus from the mangrove swamps of the Bonny River, Niger Delta revealed that the species is a deposit feeder but fed more on algae and protozoa. The variation of food types with season were determined from the numerical and frequency of occurrence methods of food analysis. The algae were of Stephanodiscus, Cosanodiscus. Navicula and Nitzschia species, while the protozoa were Arecella arenaria, Pseudodileptus and Trinema species. Feeding actively occurred at low tides, this coincided with the presence of algae on the mud surface. No qualitative seasonal variation occurred as T. fuscatus var fuscatus fed basically on the primary diets at all seasons.
    Description: Includes:-1 table.;1 fig.;9 refs.
    Keywords: Ecology ; Fisheries ; Tympanotonus fuscatus var fuscatus ; Nigeria ; Niger Delta ; freshwater environment ; Feeding behaviour ; Stomach content ; Food consumption ; Stomach ; Seasonal variations
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    Improved fish processing and preservation techniques in Lake Chad (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23336 | 19325 | 2018-04-07 17:13:31 | 23336 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Improved fish processing and preservation techniques in Lake Chad were carried out at Federal College of Freshwater Fisheries Technology, Baga, Borno State, Nigeria. Experiments were carried out using either Kainji Gas Smoking Kiln, Watanabe Kiln, Salting and Solar Drying. The improved (Modern) methods of preservation are faster, more durable, ensure a greater varieties of fish products, render bacteria actions ineffective and above all, products are more appetizing than the traditional preservative techniques but the latter are cheaper and easier to design with local materials.
    Description: Includes:- 3 table.;4 refs.
    Keywords: Fisheries ; Nigeria ; Chad L. ; freshwater environment ; Processing fishery products ; Curing ; Drying ; Processed fishery products
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    Evaluations off heavy metals in fish from Lake Geriyo Yola, Nigeria using x-ray fluorescence technique (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Description: Includes:- 1table.;11 refs.
    Keywords: Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
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    The role of middlemen in the marketing of smoked fish in Doron Baga Fish Market, Borno State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23332 | 19325 | 2018-04-07 17:07:41 | 23332 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This paper examines the role of middlemen in the marketing of smoked fish in Doron Baga fish market of Kukawa Local Government Area of Borno State. Data were obtained from 200 respondents using stratified random sampling technique, with the aid of structured questionnaire. Data were analyzed using descriptive statistical tools. Secondary sources of information were also gathered from research papers, reports and journals. The study revealed that, there are two types of middlemen in the Doron Baga fish market: selling brokers (Dillali) accounting for 75% and buying brokers (Yan acha) 25%. The role played by the selling brokers includes selling for the fishermen with commission, lending money to fishermen and providing security for the unsold fish. Buying brokers assist those that want to buy fish while the buyer gives them little amount of money as commission. Brokers get more clients when the fish during periods of maximum catch. The problems the middlemen face are failure of the fishermen to pay back the money borrowed from the selling brokers while buyers hardly trust the buying brokers.
    Description: Includes:- 3 tables.;5 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Baga ; Middlemen ; Fish marketing ; freshwater environment ; Marketing ; Market research
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    Capture fisheries of Kontagora Reservoir, Niger State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23333 | 19325 | 2018-04-07 17:09:15 | 23333 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A study of the capture fisheries of Kontagora Reservoir was carried out between January - December, 2007, using statistical frame and catch assessment survey methods. Five fish families comprising seven fish species were recorded. Hemichromis fasdatus, a cichlid was the most dominant species with mean value of 414.3 and 7715Kg in terms of number and weight respectively. Nineteen commercial fishermen were recorded, with the following fishing gears: gill net, cast nets, long lines, and Malian traps. The fishing craft included wooden canoe. The total mean catch of the fishermen were 4.40(1.36) kg/canoe or 167(52.64) fishes/canoe. The reservoir was productive in comparison with other smaller but productive African lakes. The monitoring, control and surveillance (MCS) system was suggested for management consideration, with emphasis on registration of fishermen and their fishing equipment, enforcement of minimum mesh size of 3” and establishment of community based cooperative scheme.
    Description: Includes:- 4 tables.;1 fig.;10 refs.
    Keywords: Fisheries ; Nigeria ; Kontagora Reservoir ; freshwater environment ; Stock assessment ; Catch statistics ; Fishery surveys ; Landing statistics ; Seasonal variations ; Stock identification
    Repository Name: AquaDocs
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    Production of earthworm meal for aquaculture (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23339 | 19325 | 2018-04-07 17:18:23 | 23339 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Three soil sample media (loamy, sandy and clayey) were used to culture earthworm, (Eudrilus eugeniae (Kinberg) in earthenware pots for ten weeks, under laboratory conditions. The aims of the research are to culture earthworms as replacement for fish meal, and to determine the best suitable soil medium for culturing and breeding of earthworms. Two sets of treatments were set up with the three soil samples; the experimental containing organic matter (cow dung) and the controls lacking organic matter. Watering was done every three days to keep the culture moistened. but not saturated. Results of the study showed that loamy soil had the highest number of earthworms harvested, followed by sandy and then clayey soil. Increase in number of harvested earthworms between the experimental and control groups differ significantly (P〈 O.05), with the experimental group having higher number of harvested earthworms. Loamy soil was the most favourable medium that enhanced the growth and survival of earthworms, when cultured under laboratory conditions, for fish meal replacement in aquaculture.
    Description: Includes:- 1 table.;2 figs.;10 refs.
    Keywords: Aquaculture ; Eudrilus eugeniae ; Nigeria ; Zaria ; Earthworm culture ; freshwater environment ; Aquaculture ; Breeding ; Cultured organisms
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    Status of fisheries and aquaculture development in Ekiti State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23340 | 19325 | 2018-04-07 17:19:26 | 23340 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Ekiti State has limited water surface area but blessed with some rivers and seven big reservoirs on which some artisanal fishery is being carried out by over 400 fisher folks. Fish farming in Ekiti state is largely dominated by Clarias gariepinus culture. Interest in fish farming is on the increase as farmers construct concrete fish tanks as small as 1.5m2 as well as series of contour earthen ponds or tanks as big as 30m2. The total number of ponds has grown numerically from 96 at the inception of the state in 1996 to about 2000 in 2008. The move towards private/public partnership in aquaculture development will improve the economic and nutritional status of the region.
    Description: Includes:- 1 table.;3 figs.;5 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ekiti State ; freshwater environment ; Fish culture ; Freshwater aquaculture ; Aquaculture ; Artisanal fishing ; Fishery development ; Stock assessment
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    Economic analysis of fish in Baga-Doro fish market on the Lake Chad (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23342 | 19325 | 2018-04-08 11:28:41 | 23342 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study compares market performance and profitability of fish in Baga-Doro fish market. Respondents were drawn from a cross section of fish marketers in Baga-Doro fish market. Sixty marketers were selected through a system of random sampling. Data collected were on socio-economic characteristics, cost and returns, and problem associated with fish marketing in the study area. Structural questionnaire were the instruments used for data collection .Percentage were used to describe the socio-economic problems associated with fish marketing, while gross and marketing performance models were used to describe the profitability and marketing margin respectively. The result revealed that almost all the marketers are male, with wholesalers and retailers in proportion of 70% and 30% respectively. The age proportion of the fish marketers comprises mostly of men above 45years of age, with 75% of the entire marketers population. Age between 35 and 44 covers about 20% of the population of the marketers, leaving the remaining 5% to age between 25 and 34. The gross margin was used to measure the profit level, which is expressed as: GM=sales revenue. -cost of Goods sold. Major problems faced were that of transportation and storage. The study recommends credit provision to purchase storage facilities and training workshops to increase awareness among others.
    Description: Includes:- 1 table.;5 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Baga ; Nigeria Doro ; Fish market ; freshwater environment ; Economics ; Fishery economics ; Marketing ; Market research
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    Women and sustainable fisheries exploitation (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23345 | 19325 | 2018-04-08 11:34:48 | 23345 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Sustainability in the extraction of fishery resource need to be proactively upheld if the achichment of the Millennium Development Goals (MDGs) will be anything to go by in Nigeria and other developing countries. The fishery resource, of the biotic component of the environment, and the main focus of this paper, is renewable resource whose existence if not for adverse environmental factors and natural specialization that occurs over thousands of years, is a continuum. The biological attributes of these fauna and flora render them amenable to usage in manners that still allows their continuous existence for the profit of mankind. Ignorance and the consequent inappropriate harvesting methods and uses of the fishery resource make them prone to abuse, imperilment, and eventual extinction. The influential and important roles of women as fishers, fishmongers. processors, concerned citizens of healthy living and organizers of the end use of the fishery resource put women in a vantage position to influence; thereby, enforcing conservation and sustainability in the extraction of the resource when trained in natural resource management. Consequently, women need to be trained and equipped with knowledge such as basic principles in these areas: biological attributes of the aquatic resources, measures of aquatic resource management, and approaches such as co-management, , communitybased and ecosystem-based approaches to fishery management; including simplified principles embedded within international instruments that form the legal frame work for resource management.
    Description: Includes:- 19 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; freshwater environment ; Women ; Fishery resources ; Resource management
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    Fish species composition in Igbedi Creek, Bayelsa State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23346 | 19325 | 2018-04-08 11:44:52 | 23346 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A preliminary survey of fish species composition in Igbedi Creek was carried out between July and September, 2007. Fish samples were collected from the fishermen's catches operating in the Creek and its distributary Ogoubiri River. Collected fish specimens were identified in the laboratory using standard identification keys. Thil1y-seven (37) fish species belonging to 17 families were observed. The most abundant families were the Mochokidae with seven (7) species which constituted 23.79% of the total sample collected followed by the Clariidae (10.78%) and Mormyridae (10.04%).
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Igbedi Creek ; freshwater environment ; Check lists ; Species diversity ; Biodiversity
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    Nutritional value of mango (Mangifera indica) seeds and peels (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23344 | 19325 | 2018-04-08 11:33:10 | 23344 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The nutritional value of peels and' ~eds' 9f Mango, Mangifera indica was studied by analyzing collected samples of these non conventional feedstuffs for their proximate composition. The result of the analysis shows that moisture ranged from 9.70 to 10.48% (peels) and 9.50 to 10.48% (seeds). Protein ranged from 4.08 to 4.49% (peels) and 5.38 to 8.10% (seeds). Carbohydrate was 49.35 to 62.45% (peels) and 53.64 to 70.58%' (seeds). Fat ranged from 3.98 to 6.30% (peels) and 8.30 to 12.80% (seeds. Ash content ranged from 2.20 to 4.98% (peels) and 2.00 to 3.70% (seeds). The values for the proximate parameters of the peels and seeds were comparable to values reported for other non convectional feedstuffs. The seeds of ti1'ango had higher values than peels.
    Description: Includes:- 3 tables.;1 fig.;20 refs.
    Keywords: Aquaculture ; Nigeria ; Mango ; freshwater environment ; Nutritive value ; Carbohydrates ; Chemical composition ; Feed composition ; Chemical analysis
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    Vocational training of Nigeria unemployed youths in Northeast Nigeria as fish farmers: a means of ensuring food security (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23350 | 19325 | 2018-04-08 11:52:47 | 23350 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Vocational training for unemployed youths as fish farmers plays an important role in meeting fish protein need of Nigeria, contributing immensely to the national economy by providing nutritious food for the populace, creating jobs and enhancing national health and wealth. Youths are the leaders of tomorrow thereby their contribution towards food security is important. The study considered their opinion on the training based on skills acquired during a-6-week intensive vocational training. Results show that most trainees (97.03%) are within the economically active age group of 20-39years. Most trainees were confident that the programme will ensure food abundance and have a great impact on national economy. They also considered the training helpful and not only to their immediate families but also to the country at large. Skills were acquired in 8 various enterprises of fisheries but most trainees (43.56%) show greatest interest in fish fingerlings production through induced breeding, a situation that could boost aquaculture in Nigeria in few years to come. According to the trainees, the programme is laudable, and came at the right time when Nigeria is agitating to be put among the economically developed nations. However, youths exercise fear over inconsistency that could impede the progress of the programme. Recommendations are made on how to ensure better food security through a laudable programme of this nature.
    Description: Includes:-8 tables.;4 refs.
    Keywords: Aquaculture ; Information Management ; Nigeria ; Vocational Training ; Extension Services ; freshwater environment ; Training
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    Sustainable production of mangrove oyster Crassostrea gasar (Adanson, 1757) in Rivers State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23356 | 19325 | 2018-04-08 12:07:41 | 23356 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The mangrove oyster, Crassostrea gasar inhabits the estuarine/coastal mangrove swampland of the Niger Delta. It can be found in the wild attached permanently to mangrove trees and any other hard substrate in the water. It thrives well in brackish water with a wide salinity and temperature range. The oyster has a high economic value and is accepted both locally as food. The table sized mangrove oysters sold in markets in Rivers State are from the wild. The culture potential of the oyster is yet to be explored in the State; despite the fact that details of culture techniques for the mangrove oyster have been fully documented by scientists at the African Regional Aquaculture Central Nigerian Institute for Oceanography and Marine Research, (ARACINIOMR). This paper highlights techniques for the production of table sized oyster and environmental issues that could affect long term sustainable oyster farming.
    Description: Includes:- 10 refs.
    Keywords: Aquaculture ; Crassostrea gasar ; Nigeria ; freshwater environment ; Mangroves ; Oyster culture ; Oyster fisheries
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    Growth and survival of different sex combinations of Oreochromis niloticus (L) in glass tanks (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23354 | 19325 | 2018-04-08 12:03:29 | 23354 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Growth performance and survival rates of three different sexes of Oreochromis niloticus fingerlings (27.5~c 0.02g); mixed-sex, all male and all female fed 35% CP at 5% body weight was carried out for 56 days in indoor rearing operations. Aquaria tanks (60x30x 30cm3) were used as rearing tanks and each treatment was replicated. All female tilapia had the best specific growth rate (2.54%/day), food conversion ratio (1.98) as well as survival rate (98%), least value was obtained in treatment containing the mixed sex tilapia. Specific growth rate (2.06%/day), Food conversion ratio (2.27) and survival rate (95% ).
    Description: Includes:-2 tables.;1 fig.;7refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; New Bussa ; freshwater environment ; Survival ; Sex ratio ; Food conversion ; Fish culture ; Feeding experiments
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    Opportunities for shrimp farming in the Niger Delta: dilemma of sustainable production in the absence of regulatory framework (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23357 | 19325 | 2018-04-08 12:09:40 | 23357 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Commercial shrimp farming has been practised for several decades in many countries of the world over. High demand for shrimps and corresponding high returns on investment has played major roles in the expansion of the industry. In Nigeria, farming shrimps is still novel. Notable research work includes studies conducted at the Nigerian Institute for Oceanography and Marine Research, African Regional Aquaculture Centre and Institute of Oceanography, University of Calabar. Niger Delta has potentials for farming shrimps - suitable sites, good candidate shrimp species, high local demand with potentials for export. However the major challenge would be the availability of guidelines to regulate farming activities especially as concerns the use of potentially toxic compounds in shrimp farms which could lead to deleterious effects in the environment. Efficient regulatory bodies/agencies to ensure sustainability of production system and compliance to stipulated guidelines will go a long way in the protection of the environment.
    Description: Includes:- 2 tables.;15 refs.
    Keywords: Aquaculture ; Nigeria ; Niger Delta ; freshwater environment ; Shrimp culture ; Shrimp fisheries
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    Toxicity of promethazine hydrochloride (Phenergan) to Clarias gariepinus fingerlings (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23360 | 19325 | 2018-04-08 17:55:59 | 23360 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The acute toxicity of promethazine hydrochloride (phenergan) to Clarias gariepinus fingerlings was conducted using static bioassay under laboratory conditions. The 96h LC50 was determined as 172.5 mg/1. Mean mortality was 5, 10, 20, 50, 100% in the concentration of 69, 103.5, 138.0, 172.5 and 207 mg/1 respectively, while there was no mortality in the control treatment. There were significant differences (P〈0.05) on the effect of concentration, the higher the mortality of C. gariepinus fingerlings while toxicity of phenergan increased with duration of exposure. C. gariepinus showed increased hyperactivities, cell deformation, lesions and necrosis during the period of exposure. The physicochemical parameters also showed a slight increase as the concentration increased.
    Description: Includes:- 2 tables.;9 refs.
    Keywords: Aquaculture ; Ecology ; Pollution ; Clarias gariepinus ; Nigeria ; stress ; freshwater environment ; Toxicology ; Histopathology ; Biological stress
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    Fisheries and aquaculture development in Nigeria: an appraisal (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23366 | 19325 | 2018-04-08 18:05:14 | 23366 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Nigeria has a coastline of 853km and over 14 million hectares of inland waters and thus owns significant fisheries. The contribution of fisheries to the Nigerian economy is significant in terms of supply of high quality dietary protein, income generation, creation of employment and enhanced inflow of foreign exchange earnings through shrimp export. However, due over-exploitation of the natural resources, by-catch and discard problem, inadequate infrastructure and social amenities development, inadequate supply of fish feed, fish seeds and slow adoption of new technology and management strategies etc. The domestic fish production (0.55 million tons) has fallen short of the demand (1.5million metric tons). Aquaculture development is the solution to the unpredictable production through capture or artisanal/industrial fisheries.
    Description: Includes:- 21 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; freshwater environment ; Aquaculture ; Brackishwater aquaculture ; Freshwater aquaculture ; Marine aquaculture ; Aquaculture development ; Fishery development
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    Development of a model rotatory fish smoking kiln using agro-wastes as source of fuel (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23359 | 19325 | 2018-04-08 12:13:35 | 23359 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A model fish smoking kiln was designed and fabricated to use agro-wastes (sawdust, palm kernel shell and rice bran) as alternative to conventionally used charcoal (control) as fuel energy source for smoking fish. Clarias gariepinus was washed, brined and smoked in chunks or whole in the kiln. The smoking kiln has an estimated capacity of 40kg of fish/batch with six fish trays and 36 fish hooks. Heat transfer is by conduction and convection. The rotatory wheel and axle on which the fish drying trays were anchored ensured even distribution of heat. The kiln has 69.4% energy efficiency and drying period of 10 hours at an average temperature range of 60 - 120degreesC, depending on the type of agro-waste used as source of fuel energy. The fuel conversion ratio, drying rates and calorific values of the different agro-waste products were also determined. Calorific value of the four agro-wastes ranged between 16.2MJ/Kg in palm kernel to 30MJ/Kg in charcoal. The drying rates of sawdust and rice bran compare favourably with charcoal and they produced smoked fish similar in dryness and quality with fish smoked with charcoal. Palm kernel had the least drying rate of smoked fish (weight/hour) during the 10-hour smoking duration.
    Description: Includes:- 3tables.;2 figs.;9refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Curing ; Processing fishery products ; Cured products
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    Efficacy of formalin in the removal of adhesiveness from Clarias gariepinus eggs during artificial propagation (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23358 | 19325 | 2018-04-08 12:11:51 | 23358 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The aim of this study was to establish the efficacy of formalin in removing the adhesiveness of Clarias gariepinus eggs during artificial propagation and the effects on prospective fry. 1g of catfish eggs were put in five concentrations of formalin \{O.O (control), 0.4, 0.6, 0.8 and 1.0 mg/l\} at three exposure times (10, 15 or 20min). In each treatment, the detachment of eggs increases with exposure time but were not significantly different (P〉O.05). 0.4mg/1 of formalin had the highest number of detached eggs. At the highest formalin concentration 72% of the eggs still adhered together which provide a good substrate for the growth of fungi. The use of formalin delayed hatching of C. gariepinus eggs when compared with the control. The more the exposure period of C. gariepinus eggs to formalin, the higher the hatching time. Survival of fry was highest in the group that has been exposed to 0.4mg/1 and exposure period of l0min. At the highest concentration (1.0mg/l) and exposure period (20min), the survival was lower by 55.5%. Based on this study, the optimum concentration of formalin was O.4mg/l and exposure period of l0min. for the removal of egg adhesiveness, increase hatching and improved survival success of C. gariepinus.
    Description: Includes:- 4 figs.;10 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Preservatives ; Anticoagulants ; Coagulants ; Dispersants ; Fish culture
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    Gender issues in economics of fish farming in Maiduguri and environs (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23362 | 19325 | 2018-04-08 17:58:42 | 23362 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study focused and examined gender issues in economics of fish farming in Maiduguri and its environs. The socio-economic characteristics of the fish farmers were examined. The profitability of the industry and constrains affecting fish farming in the study area were analyzed. Stratified random sampling technique was used due to the heterogeneous nature of the population considering 30% of the fish farmers as the sampled size. Descriptive statistics and net farm income were used to analyse the data obtained. It was revealed that 81.25% of the respondents were male while female fish farmers represented 18.75% of the respondents. 84.40% of the respondents had tertiary education while farmers with secondary certificate and adult education constituted 12.50% and 3.10% respectively. Net farm income profitability analysis of male and female farmers were N193,767:00 and N445,557:00 respectively. It was also observed that the major constraints militating against fish farming in the study area were scarcity of fingerlings, lack of improved technology, inadequate capital, high cost of equipments, lack of land and management difficulties. It was recommended that adequate training, continuous capacity building and improved technology in fish production must be made available to farmers: and farmers should have access to sources of fingerlings.
    Description: Includes:- 3 tables.;2 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Maiduguri ; Women in Fisheries ; freshwater environment ; Sex ; Fish culture ; Women
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    Evaluation of Afzelia africana seeds as protein feedstuff in fish diets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23368 | 19325 | 2018-04-08 18:08:23 | 23368 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Seeds of the legume Afzelia africana were analyzed and evaluated for use as protein feedstuff in fish diets. The seeds were heated to inactivate the anti-nutritional factors. Two iso-nitrogenous diets (26%) were produced using A. africana or Bonga-fishmeal as protein sources and labeled FI and F2, respectively. The resulting pellets were sinking pellets and were well accepted by tilapia based on the reaction time to feed presence and proportion of pellets eaten within one hour. Fl pellets were more stable in water than F2 pellets with mean dissolution times of 190 mins and 135 mins, respectively
    Description: Includes:- 7 tables.;4 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Feeding experiments ; Feed composition ; Feed preparation ; Nutritional requirements ; Nutrition ; Fish culture
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    Survival and response of Oreochromis niloticus to different feeds (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23374 | 19325 | 2018-04-10 16:10:47 | 23374 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study determined the survival and the response of Oreochromis niloticus to different feeding compositions. 90 Oreochromis niloticus juveniles were fed different diets in triplicated treatments inside glass tanks. Treatment I comprised locally compounded diet; Treatment II, imported pelletized feed; and Treatment III - processed feathermeal based diet. Results showed that there was no significant differences (P〉0.05) in the weight gain, feed intake, survival and feed conversion ratio. However, Treatment I had the highest feed intake, while treatment n had the highest weight gain and feed conversion ratio.
    Description: Includes:- 4 tables.;21 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Feeding experiments ; Feed preparation ; Nutritional requirements ; Fish culture ; Survival
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    Genetic improvement of tilapia: challenges and prospects in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23373 | 19325 | 2018-04-10 16:09:38 | 23373 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The contribution of tilapia aquaculture in Nigeria to world output is negligible due to stunting, poor market value among others. This paper evaluates the aquacultural credentials of tilapia, some genetic improvement technology in cultured tilapia, namely, ploidy, hormonal sex reversal. transgenic, hybridization, and the necessity of Genetic Improvement in accelerating tilapia production in Nigeria. Investigation reveals the presence of O. niloticus with the highest growth perfermancc index (~h1=3.11) for Lake Kanji which indicates high growth potential in suitable culture environment and could serve as a good starting point for genetic development. The presence of ”wesafu”, an ecotype cichlid, endemic to Epe lagoon, Lagos, which grows to 1500g in the wild, appears to be an excellent candidate for genetic improvement of a commercial strain for the growing aquaculture industry. Tilapia Genetic improvement in Nigeria is faced with a number of setbacks. This includes short- term, scattered and disjointed funding, inadequate genetic research facilities, ecological risk, inadequate skilled manpower and poor documentation of tilapia genetic resources among others. Considering the growing importance of tilapia culture, the need to document, conserve, evaluate and utilize tilapia genetic resources is highlighted to enhance the success of food security in Nigeria.
    Description: Includes:- 3 tables.;26 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Fish culture ; Genetics ; Selective breeding
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 23-28
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    Body-weight variations in four week old Clarias gariepinus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23371 | 19325 | 2018-04-10 16:06:58 | 23371 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The variation in size and weight of fry and fingerlings of Clarias gariepinus has been a major factor affecting the success of hatchery production of the species. It encourages cannibalism, thus reducing the overall survival. The disparity in weight and population was assessed to determine the necessity of sorting as a reliable method of controlling size disparity and mortality in hatchery production. Two-week-old fry with average weight of 15mg and length range of 0.8-0.9cm were randomly sampled and stocked at 200 fry/litre in 30 litre circular tanks. The fish were fed for four weeks on 45% crude protein diet, ad libitum. At the end of four weeks, there were three groups; large, medium and small with mean weight of 4.02g, 1.24g and 0.17g, respectively. The cumulative mean weight was 1.8g, population ratio was 1:8:10 for large, medium and small, respectively.
    Description: Includes:- 1 fig.;10 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Fingerlings ; Fry ; Weight ; Survival ; Induced breeding
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 16-18
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    Aquaculture investment in Nigeria: a case study of New Bussa (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23377 | 19325 | 2018-04-10 16:16:41 | 23377 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Hunger and malnutrition have remained amongst the most devastating problems facing the majority of Nigerian poor. These challenges and other social and economic objectives are the main forces driving aquaculture development to augment for food deficient, in particular fish, which is the cheapest source of protein. However looking at the aquaculture potential and the demand for fish, more needs to be done in aquaculture sub-sector. Unfortunately, despite the increase awareness, many people still remain skeptical about returns in aquaculture investment. This backdrop prompted the study, which empirically analyzed the situation based on two (2) semi-concrete ponds at NIFFR. The results which were extrapolated for five years shows a cost benefit ratio of 1.8, which indicated worthy investment. The results would essentially serve as guide to practitioners and intended fish farmers
    Description: Includes:- 5 tables.;12 refs.
    Keywords: Aquaculture ; Nigeria ; New Bussa ; Cost Benefit analysis ; freshwater environment ; Aquaculture ; Aquaculture development ; Costs
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 40-43
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    Reducing by-catch through fishing gear modification (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23379 | 19325 | 2018-04-10 16:39:49 | 23379 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: There have been considerable efforts in recent years to modify fishing gears and practices to target particular sizes and species of fish (fin and shell) and other marine organisms more efficiently. By catch consideration and gear modification play an important role in regulation of several major fisheries and new by-catch reduction devices and other innovative gear modification are continuously being proposed and tested to mitigate against these problems, among which are the turtle excluder device (T.E.DS) in the shrimp trawls to reduce mortality of endangered sea turtle; sorting grids and scaring device in long line fisheries. This paper assesses the incidence of by catch in fisheries, provides a review of successful developments and application of selective fishing techniques that have been used to achieve by-catch reduction. Recommendations were also made on effective monitoring of fishing gears to ensure that devices aimed at reducing by-catch are included and fishermen use only the appropriate gears to limit by-catch and discards.
    Description: Includes:- 3 tables.;4 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; By catch ; Gear selectivity
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 48-51
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    Application of holistic approach for sustainable fisheries: a case study of Kainji Lake Basin (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23383 | 19325 | 2018-04-10 16:47:20 | 23383 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The sustainability of the resources requires much more than paying attention to a single factor, rather looking at it in a holistic manner. Specifically, other economic infrastructure and resources that form the essential components of the fisheries system and fishers livelihood needs to be considered. This to a greater extend will permit choice and mobility of livelihood portfolios, hence reduction in fishing efforts and sustainability of the sector, which eventually translate into development of the sector. However, provision of these facilities are often capital intensive and often left for the government along to provide.
    Description: Includes:- 1 table.;1 fig.;8 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Inland fisheries ; Fishery development ; Fishery management ; Fishery resources ; Fishermen
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 63-66
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    An integrated chicken-fish system in concrete ponds (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23380 | 19325 | 2018-04-10 16:41:16 | 23380 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Four treatments (in duplicate) were used to detennine the optimum combination ratio in the chicken-fish integrated system in 4 m2 concrete ponds. Treatment I (TI) consisted of a concrete pond integrated with one point-of-lay chicken while treatment 2 (T2) had two point-of-Iay chickens integrated over a concrete pond. Treatment 3 (T3), consisted of three point-of-lay chickens integrated over a pond and treatment 4 (T4) was the control and involved no integration. Each concrete pond was stocked with a poly-culture of Oreochromis niloticus and Clarias gariepinus in a ratio of 3:1. Compounded fish feed was used to feed the fish in T4 twice daily at 5% of their body weight while fish in TI. T2 and T3 fed on wet chicken manure and spilled chicken feed that fell directly into the ponds. The daily manure loading rate ranged from 55.80g in TIR2 (treatment l replicate 2) to 117.37 g in T3RI while spilled feed loading rate ranged from 2.52 in T2R2 to 9.27g in T3R2. The total number of eggs laid was 871 in 84 days. For C. gariepinus, fish in T4RI had the highest mean weight gain of all the treatments and TIRI, the lowest. T3R2 had the highest mean weight gain of all the integrated treatments. For O. niloticus fingerlings, fish in T4 which were fed compounded feed had the highest mean daily weight gain and while those in T1 had the lowest. T4RI fish had the highest mean weight gain while TIR2 fish had the lowest. Fish in T3 had the highest mean weight gain of all the integrated treatments followed by fish in T2. However, physico-chemical parameters were more adverse and survival was lower in T3 than in T2 and so a combination ratio of 20 fingerlings in a 4 m2 concrete tank integrated with two laying chickens (mean weight 1.93 kg) is recommended. This translates to 50 laying chickens/100 m2 concrete pond stocked with 500 fingerlings.
    Description: Includes:- 3 tables.;Refs.
    Keywords: Aquaculture ; Nigeriaa ; New Bussa ; Rice-Fish- Culture ; Poultry-Fish-Culture ; freshwater environment ; Fish culture ; Rice field aquaculture ; Agropisciculture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 52-54
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    Improved floating diets for African catfish and Nile tilapia (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23386 | 19325 | 2018-04-10 16:51:37 | 23386 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Flotation potentialities of diets bound with Polymethylo-cabarmide and other local starches and Saccharomyces cerevisiae floater were investigated in the laboratory. The binders and floater were fixed at 10 and 4% respectively in isonitrogenous 30% crude protein diets for catfish and Tilapia. Flotation were significantly (P〈0.05) highest (100.00 - 96.67%) in Polymethylo-cabarmide based binder. Wheat grains starch (WGS) was highest (p〉O.05) among the local agents in the first 10 minutes. Cassava tuber starch (CTS) significantly (P〈0.05) succeeded WGS from 15 minutes till end of immersion. The least effective was maize grain starch (MGS).
    Description: Includes:- 1 table.;1 fig.;19 refs.
    Keywords: Aquaculture ; Nigeria ; New Bussa ; Floating Fish Feed ; freshwater environment ; Feed ; Feed composition ; Feeding experiments ; Feeding ; Artificial feeding ; Nutrition
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 73-75
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    Heavy metals and sensory evaluation of canned tuna fish (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23394 | 19325 | 2018-04-12 07:15:29 | 23394 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In this study, two heavy metals in canned tuna fish were determined after digestion by the AOAC methods. Mercury and Cadmium levels in canned tuna fish were determined by flame atomic absorption photometry. The results of this study indicate that canned tuna fish imported into the country have concentrations well below the petmissible FAO/WHO levels for these toxic metals. Their contribution to the body burden can therefore be considered negligible and the fish seem to be safe for human consumption. For the sensory evaluation, tuna flakes in vegetable oil (Starkist) from Ghana and light meat tuna chunks in sunflower oil (John West) from Thailand were the most preferred while tuna flakes in brine (John West) from Thailand is the least preferred.
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Fisheries ; Health ; Nigeria ; Lagos ; freshwater environment ; Heavy metals ; Processed fishery products ; Canned products ; Tuna fisheries ; Mercury ; Cadmium
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 104-106
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