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  • 101
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    Potential impact of climate change on fisheries and aquaculture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24584 | 19325 | 2018-05-20 15:57:28 | 24584 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Climate change will have significant impacts on Nigeria's freshwater and marine aquatic systems. and hence on the countries fisheries and aquaculture. Fisheries and aquaculture are highly vulnerable to changes in weather pattern. and the impacts, which could be negative or positive, will vary from the coastal areas to the drier northern parts of the country. Elevated water temperalures will affect fish physiological processes, thereby affecting spawning. survival of the juveniles, recruit into the exploitable phase of population, population size, production and yield. The impacts of increased flooding of the freswater bodies will be negative through erosion of watershed, destruction of fish feeding and breeding habitats, decrease in primary productivity and alteration of the normal resilience of the aquatic systems, or positive in expansion of aquatic habitats for primary and fish productions especially during the dry season. Drought will exacerbate draw down of the lakes and reservoirs, and insufficient flow in the river hasins for spawning and primary pro duction thereby affecting fish production. Rise in the water level of the Atlantic ocean will lead to intrusion of more salty wafer into The river delta areas, and inundation of the coastal low-lying areas, thus affecting distribution of both the freshwater and marine fishes as a result of changes in the physical and chemical properties of the waters. The impacts will ultimately affect fish population, production and supply, thereby affecting the livelihood of over 26 million people engaged in the primary and secondary sectors of the fisheries industry, as well as food security of the country. The adaptation and mitigation strategies will be based on the peculiar characteristics and interactions of fisheries and aquaculture within the framework of feasible policy instruments. Strategies and policy measures need to be evolved to combat the observable and projected impacts of climate change on fisheries and aquaculture, in order to protect the livelihoods of the fishing communities and food security.
    Description: Includes: 13 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Fisheries ; Nigeria ; Climate change ; Fisheries ; Aquaculture ; Impacts ; Mitigation ; Food security ; freshwater environment ; automation
    Repository Name: AquaDocs
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    Format: 76-80
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  • 102
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    Benefit related relationship among artisanal fisher folks of Tombo fish landing community (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24603 | 19325 | 2018-05-21 12:20:04 | 24603 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Benefit related relationship among the artisanal fisher folks of Tomho, a fishing community in Western Rural District of Sierra Leone was studied. The study was carried out to ascertain the socioeconomic activities of the target group, their level of involvement and reasons for going into transactional sexual activities. Eighty (80) structured questionnaires were administered to randomly selected fishermen and people engaged in fish related activities and this was backed up hy the record of HIV cases especially among women at tht Tombo Community Health Centre. Data collected from the interview were treated using measure of central tendency such mean and percentages and results are presented in tables and charts. Respondents age ranged between 15-65 years; sex (fishermen to fish traders) was 71.3% (female) and 28.75% (males) respectively. Marital status of respondents was single, married, divorced, seperated and widowed. Predominant religion of repondents was Islam and Christianity. The study revealed that transactional sex in the study area is mediated by economic structural and environmental factors. The study also revealed that 70.12% of documented HIV cases at the Tombo Community Health Centre were female, while 29.87% were male between the active age of 15-55 years. Fish traders (68.8%) constituted the highest carriers of HIV in the study area.
    Description: Includes: 9 references.
    Keywords: Fisheries ; Sociology ; Nigeria ; Tombo ; Fishing communitu ; Transactional sex ; Socio-economic ; Community health Centre ; freshwater environment ; automation
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    Format: 146-149
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  • 103
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    Impact of water hyacinth (Eichhornia crassipes) on fish catch in the lower Taylor Creek area of Bayelsa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24605 | 19325 | 2018-05-21 12:24:48 | 24605 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The aim of the study was to access the impact of water hyacinth, Eichhornia crassipes on fish catch in the lower Taylor Creek area of Bayelsa State. The experimental approach involved the division of the creek into new stations: infested and non-infested at the littoral zone. Subsequently, the deployment of six Malian traps with dimensions of 70cm diameter and 80cm height were set in each station for a period of six months using groudnut cake as bails. Furthermore, fish caught were counted and identified into families and species. From results, fish species composition obtained from the stations were a total of 9 families and 15 species. However, it was observed that the water hyacinth infested area had the lowest fish catch while the non-infestated area had the highest number of fish catch for both dry and wet season. It is therefore concluded that the invasion of Eichhornia crassipes impacted on fish population and composition.
    Description: Includes: 12 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Eichhornia crassipes ; Fish catch ; Taylor creek ; Bayelsa ; freshwater environment ; automation
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    Format: 153-155
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  • 104
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    Assessment of heavy metals in water and fish from Ibrahim Adamu Lake, Jigawa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24612 | 19325 | 2018-05-22 05:59:44 | 24612 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to assess the levels of heavy metals in water and the flesh of tilapia (Oreochromis niloticus). Water and tilapia were sampled for a period of 12 months from October, 2003-september 2004. Water and muscle tissue were analysed for Cu, Cr, pb, and Zn using flame atomic absorption spectrophotometer. The assessment showed Cr (3.35mg/l), Cu (0.75mg/l), pb (0.81mg/l) in water while Cr(2.27mg/kg) and pb (0.27mg/kg) were found to be high in the tissue samples and were above the values recommended by WHO and the Food and Agricultural Organization (FAO)of the United Nations and therefore not safe for human consumption.
    Description: Includes: 17 references.
    Keywords: Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Heavy metals ; Oreochromis niloticus ; Atomic absorption ; Spectrophotometer ; freshwater environment ; automation
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    Format: 179-181
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  • 105
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    Survey of physical characteristics of the upper reaches of new Calabar River, Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Format: 206-210
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  • 106
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    Physico-chemical parameters in relation to fish production of Dadin Kowa Dam, Gombe State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Format: 211-213
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  • 107
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    Genetic status of tilapia at Badore landing site using RAPD markers (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24620 | 19325 | 2018-05-22 06:15:41 | 24620 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Molecular technique based on Random Amplified Polymorphic DNA (RAPD) analysis was applied to study genetic status among tilapia species from Badore landing site of Lekki lagoon. Individual variations within species population were assessed using PCR-RAP analysis with five Operon primers (OPC04, OPA02, OPB08, OPE02 and OPF03, Operon Technologies Inc, USA) which revealed dif ferent banding patterns of varying primer reproducibility. Graphical representation using UPGMA cluster analysis produced a dendrogram chart with five clusters (~f, ~e, ~p ,~S, and ~W) indicating different degrees of variations and similarities. There were various levels of genetic similarity observed possibly due to hybridization. Nevertheless, few distinct variations among the samples were visible, show ing possible genetic variability. At 0.89 (89%) coefficient, cluster,~f is made up of 7 samples which are genetically similar. At 0.834 (83.1 %) coefficient, distinct sample BTl2 forms a cluster (~p) with cluster ~f which shows they are related at this coefficient. Cluster ~W (84% coefficient) comprising of 7 samples forms another cluster with a distinct sample BT06 at about 0.79 coefficients. At 78.6% coefficient (cluster ~e). All the samples are genetically similar except sample BT17. This distinct sample can increase genetic variability by a cross between it and other strains of tilapia. Therefore, care should be taken by fish farmers who buy or use the fish samples from this landing site for culture. Proper molecular characterization of this fish species before culture becomes necessary to avoid genetic problems.
    Description: Includes: 17 references.
    Keywords: Biology ; Fisheries ; Nigeria ; Genetic ; Tilapia ; RAPD ; Badore ; freshwater environment ; automation
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    Format: 214-216
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  • 108
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    Preliminary investigation of fish species abundance of Otammiri River, Owerri, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24626 | 19325 | 2018-05-22 06:25:03 | 24626 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study of fish species abundance of Otammiri River, Owerri, Nigeria was conducted from April to August, 2012. Four hundred and three (403)fishes belonging to 10 families, 16 genera and 21 species were collected from artisanal fishers using various fishing gears. The fish samples were taken to laboratory, identified, counted and their weights and lengths measured. The unnamed cichlid species ranked highest in percentage number and weight as well as Index of Preponderance (38.7%, 33.6% and 51.1% respectively), while the least were Polycentropis abbreviata, Hepsetus odoe, Synodontis omias, Chrysichthys aluensis and Chrysichthys furcatus each constituting 0.2% of the total number of fish collected. Among fish families, Cichlidae ranked highest in percentage number (82.63%) and weight (81.2%), followed by Hepsetidae (5. 7% and 8.0%) and Anabantidae (4.47% and 2.8% respectively). The least were Characidae, Notopteridae and Mochokidae. The presence of an unnamed fish species in the river is an indication that there could be more unknown aquatic living resources with strong potential benefits to the River. The information provided in this study reflects the potential of the fish resources of Otammiri. This will serve as invaluable baseline tool in fisheries management planning and policy formulations that will enhance the development of fisheries in the area.
    Description: Includes: 15 references.
    Keywords: Ecology ; Fisheries ; Polycentropsis abbreviata ; Hepsetus odoe ; Synodontis omias ; Chrysichthys aluensis ; Chrysichthys furcatus ; Nigeria ; Otammiri River ; Index of preponderance ; Fisheries management ; Otammiri River ; freshwater environment ; automation
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    Format: 237-240
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  • 109
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    Fecundity, gonadosomic index and spawning period of Chrysichthys nigrodigitatus of the Lower Cross River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24629 | 19325 | 2018-05-22 06:30:19 | 24629 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The estuarine catfish, Chrysichthys nigrodigitatus, is a prized food fish in Nigeria especially in the Niger Delta region. There is a growing concernrn over the sustainability of the fishery in the face of climate change and environmental variability. Studies were conducted on the fecundity, gonadosomatic index and the spawning period of the species. The objectives were to determine the average fecundity of the species and to use the gonadosomatic index to determine its spawning period with the aim of proffering management advice and prerequisites of the species in the face of climate change. A total of 44 females and 40 males were used for the study which spanned the period from May 2011 to April 2012. The fecundity of the species ranged from 3,730.5 eggs to 41,535.9 eggs. There was correlation between the total fecundity and fish weight (p~,01, r= 0.80, n= 44). The regression model for the relationship was expressed as fecundity = 4660.8+4.76 weight. The gonadosomatic index was highest in the month of May and dropped sharply in june signifying that spawning in Chrysichthys nigrodigitatus starts around this period. The implications of these findings in respect to sustainability of the species, and its aquaculture in the face of climate change are discussed.
    Description: Includes: 14 references.
    Keywords: Fisheries ; Atmospheric Sciences ; Chrysichythys nigrodigitatus ; Nigeria ; Lower Cross River ; C. nigrodigitatus ; Reproduction ; Climate change ; Cross Rivber ; Sustainability ; freshwater environment ; automation
    Repository Name: AquaDocs
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    Format: 253-255
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  • 110
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    Fish processing technologies in Eti-Osa Local Government Area of Lagos State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24671 | 19325 | 2018-05-23 07:46:56 | 24671 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Traditional fish processing technologies vary widely in terms of equipment type, size and processing efficiency in Nigeria's coastal states. This study was carried out to identify fish processing technologies and evaluate the effectiveness, energy sources and efficiency of fish smoking equipment in use in the study area. Data were collected using structured questionnaire administered between January and March, 2011 in seven fishing villages along the coastline in the lbeju-Lekki LGA, Nigeria. Major fish species being processed were identified; and the profitability of the post harvest technologies adopted was evaluated. A total of five traditional fish processing equipment were observed; and included galvanized iron sheet supported by planks 51 (46.4%); drum oven 8 (7.2%); black clay oven 24 (21.8%); red clay oven 9 (8.1%); brick kiln 5 (4.2%) and government model kiln 4 (3.5%). Generally, energy sources were fuel wood and charcoal for traditional fish processing equipment; and electricity for the government model kiln. Majority of traditional fish processors were peasant women; and three types of processing technologies were observed, including air drying (1.0%), hot smoking 169.1%); and salting and smoking (29.9%). The capacity of kilns and ovens observed ranged from 20 to 50kg daily with a price range of Nl0,000 to N50,000. Factors considered before replacement of smoking equipment by the processors were equipment ruggedness, cost and production capacity. Women's involvement in traditional fish processing was 95%; and major fish species in the value chain included Ethmalosa fimbriata, Caranx senegallus, Sardinella maderensis,Drepane africana, Cynoglossus monodis, Pseudotolithus megalensis, P. typus, Arius latiscutatus and A. mercatoris. It was observed that products of traditional fish processing industry were readily acceptable to consumers and commanded marginal market prices with optimal economic benefits to processors.
    Description: Includes: 25 references.
    Keywords: Fisheries ; Nigeria ; Fish value chain ; Coastline ; Processors ; Women ; Traditional fish processing equipment ; freshwater environment ; automation
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    Format: 423-427
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  • 111
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    Fisher folk's response to climate change in New Bussa and its environs of Kainji Lake Basin, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24661 | 19325 | 2018-05-27 14:57:38 | 24661 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: The study examined fisher folk responses to climate change in Kainji lake basin. The sample comprises of fisher folks within and New Bussa. Eighty questionnaires were administered to obtain the primary data and analysed using descriptive and inferential statistical tools. The results revealed that majority (70%) of the respondent were male, however (61.2%) of them had tertiary education. Majority (60%) of the respondents were aware of changes in climate in the area. Majority (65%) and (55%) of the respondents were involved in incidence of deforestation and charcoal production respectively. In conclusion, it was discovered that little knowledge about climate change and its effects were found among fisher folk. Therefore it recommends that sensitization workshops/lectures be done to enable the fisher folk have adequate knowledge on climate change and the implications on fisheries activities in the basin.
    Description: includes: 11 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Climate change ; Fisher folk ; Fishing community ; Awareness ; freshwater environment ; automation
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    Format: 380-384
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  • 112
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    Public relations and extension services in Nigerian fisheries industry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24663 | 19325 | 2018-05-27 14:59:47 | 24663 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The paper discussed the importance of fish as a food commodity and the rich icthyofauna resources of Nigerian territorial which has not been optimally utilized to be sustainable. Among the challenges facing the fisheries subsector of Nigerian economomy apart from overfishing, poor post-harvest technology and high incidence of sea piracy is poor level of communications, public relations, restricted access to extension services especially to the rural artisanal fisherfolks/fish farmers in Nigeria . This has been identified as contributory to the increasing shortfall between demand and supply of fish in Nigeria. There is a need/or a good public image fisheries concerns. Production and marketing personnel need to respect the wishes of the consumers and have good interpersonal relationships. Communication should be a 2-way affair between the extension officers and the fisherfolks in the rural communities to be achieved. The various media that could aid better dissemination in the Fisheries subsector were highlighted. The author recommended better funding, training of extensionists and target audience, improved public sensitization of rural practitioners to fish output. There is a need for a more productive and result-oriented reform in Nigerian extension system. A unified extension is also recommended for effective extension education from the stage of production, handling, processing, transport and retailing. More conducive enabling environment should be created by the government.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Nigeria ; Public relation ; Communication ; Funding ; Extensionists ; Fisherfolks ; freshwater environment ; automation
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    Format: 388-391
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  • 113
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    Comparative nutritional composition of smoked catfish (Clarias gariepinus) produced from NIOMR smoking kiln and local cut-drum oven (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24668 | 19325 | 2018-05-23 07:52:49 | 24668 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of two different preservative equipment-the NIOMR (Nigerian Institute for Oceanography and Marine Research) kiln and local cut-drum oven-on crude protein, minerals and vitamins of C. gariepinus were studied. The fish were obtained from Africa Regional Aquaculture Centre, Aluu, Port Harcourt. Moisture, crude protein, crude fibre, crude fat and ash content were determined using standard methods. There were significant differences (P〈0.05) in the moisture and crude fiber content. The moisture content of the fish sample ranged from 2.18 to 5.98, this could be attributed to the drying methods. The crude fibre content ranged from 2.78 and shows no significant difference. The ash content of the samples ranged from 0.25- 0.6%, an indication that smoking reduces the ash content of fish. Result of the crude protein of fresh fish was 21.84 ~c 1.10 which increased to 59.53 ~c 1.88 and 35.41 ~c1.00 in NIOMR smoking kiln and local oven respectively. This means that, there was a significant different in the effects of the two dryers on crude protein. The vitamin content of both ovens showed no significant difference except in vitamin A which was significant in the fish dried with smoking kiln. There was significant different (p〈0.05) in the mineral content of the two drying equipment, this was in Sodium, Potassium and Phosphorus level of fish smoked with NIOMR smoking kiln. This result indicates that the two drying methods have varying effects on the nutritional quality of catfish, which is in favour of NIOMR kiln.
    Description: Includes: 8 references.
    Keywords: Fisheries ; Nigeria ; Smoking ; Production ; Preservative research ; Quality ; freshwater environment ; automation
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    Format: 412-414
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  • 114
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    Preliminary investigations of Njuwa Lake, Adamawa State, for fish production enhancement and resuscitation of Njuwa annual cultural fishing festival (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23228 | 19325 | 2018-03-18 14:56:29 | 23228 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Lake Njuwa has a historical and cultural heritage and has been a veritable source of livelihood to the people of Yola town on the South-western side, and Rugange village on the North-eastern side of the lake. Many Rivers and streams flow into the Lake. From the South Western side River Chouchi and Mayo Chudde; from the South Eastern side by numerous streams such as Mayel Lumo, Mayel Kalwa, Mandare streams and many other small streams (about five) drain into Njuwa Lake. The major contributor to the Lake is a "neck" in the North Eastern side of the Lake which emanates from Benue River. When River Benue is full especially when Lagdo spill gates are open in September, the neck allows water from the back-flow of Benue to enter the Lake and with it comes the recruitment of the Lake's fish species diversity Preliminary investigation revealed that Njuwa Lake despite its numerous environmental problems which sometimes leads to its complete drying, has very ideal limnological parameters for fish production. Njuwa was reported to be 17.5km2 (17500m2) before the construction of Lagdo dam on River Benue on the Nigeria-Cameroon boarder by the Cameroonian Authorities and the numerous irrigation projects around the Lake and River Benue. As at December 1981 however, aerial photos showed that it had shrunk to 3.5 km (3,500m2). As at November 2004, it has completely dried up. It was reported that cars could actually drive through on the dry bed of the Lake. The average depth of the Lake is around 0.5 meters and the water is very turbid. Farming around the Lake has triggered a higher level of deposit into the flood water which serves as silting material for the Lake. This is in addition to farm chemicals run off from the rain fed and irrigated crop, increasing the nutrient supply to lake's water thereby leading to accelerated eutrophication with it adverse consequences. Fish species diversity is also very high from on site report. Therefore the lake offers a unique potential for both artisanal fishing and fisheries tourism through the resuscitation of the cultural fishing festival despite the environmental degradation that it has suffered over the years. In view of the great prospects of the Njuwa Lake basin, if properly developed for its multidimensional benefits to the local economy in tourism job creation, food security, livelihood diversity and environmental improvement, the development of the lake basin on a holistic basis is highly recommended. The process should capture and involve the interest of all stakeholders around the Lake.
    Description: Includes:- 1 table.;1 fig.
    Keywords: Fisheries ; Limnology ; Nigeria ; Njuwa L. ; freshwater environment ; Fishery development ; Water conservation ; Fishery management
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  • 115
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    Food and feeding habit of freshwater Mormyrid (Hyperopisus bebe occidentalis, Gunther) in River Rima and Goronyo Dam, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23231 | 19325 | 2018-03-18 15:06:24 | 23231 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The food and feeding habits of Hyperopisus bebe occidentalis caught in River Rima and Goronyo Dam in North western Nigeria were investigated A total of four hundred and fifty four (454) fish samples were collected on monthly basis from October, 2001 to September, 2002 are examined for feeding adaptations and gizzard content. The mouth is terminal in studied species. Two types of teeth were identified viz; cardiform and molariform. The gill rakers were 0.09~c 0.04cm in length with 0.010~ccm interspacing. The compartment of gut included gizzard-like stomach. The gut length and fish length (GL-TL) indicated rectilinear positive relationship. The regression coefficient (b) and correlation coefficient (r) of the gut length fish length relationships were significant (p〈 0.05). The main taxa of food items identified included substances of plant and animal origins, with overall percentage occurrence of 69.8 and 20.7% for samples from River Rima and 59.1 and 20. 0% for those from Goronyo Dam in the same order. During the dry season, the frequency occurrence of plant substances were higher in the juveniles (〈30cm, TL) 70.9% and adults (=30cm, TL) 64.7% in River Rima than the values obtained in samples from Goronyo Dam. Their occurrences in Goronyo Dam were fairly higher in the adults (62.9%) than in the juveniles (53.6%) during the same season. The results of this study showed higher occurrence of plant materials in juveniles than in the adults from the two water bodies during the rainy season. Contrary to this, low frequency occurrence of substances of animal in the juvenile samples from River Rima (15.2%) and Goronyo Dam (17.1%) were obtained in adult samples, the occurrence of animal substances were more than those of plants from the two seasons and water body. The feeding adaptive features revealed the ecological roles of the fish species that could be useful in satisfying their food requirements in culture systems and for teaching and further research.
    Description: Includes:- 5 tables.;19 refs.
    Keywords: Ecology ; Fisheries ; Hyperopisus bebe occidentalis ; Nigeria ; Rim R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Feeding behaviour ; Feeding ; Food preferences
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    Potentials of some medicinal plants as fertility enhancing agents in fish (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23236 | 19325 | 2018-03-18 15:14:46 | 23236 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The potentials of some medicinal plants that enhance fertility in animals were highlighted. Though, these medicinal plants can be used for other purposes but this paper focused on the fertility potential of the plants on animals. Some of the plants such as date palm (Phoenix dactylifera), wild yam (Discorea villosa) and Focus capensis had been discovered to enhance fertility in rats, monkey and poultry. Therefore if these medicinal plants could work on rats and poultry for fertility enhancement, the plants could as well be tried on fish so as to enhance the fecundity and sperm production in female and male brooders which will eventually lead to increase in fish seeds production. However, research is on going on the use of some medicinal plants to enhance fecundity and sperm production in male and female brooders in order to increase fingerlings production which would subsequently lead to increase in fish production.
    Description: Includes:- 1 table.;12 plates.;22 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; freshwater environment ; Fertility ; Aquatic plants
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    Socio-cultural impact of tourism in Nigeria: a case study of fisheries development in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23244 | 19325 | 2018-03-25 12:38:25 | 23244 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Socio-cultural impact of tourism has become a veritable tool for fisheries development in Nigeria. Little wonders that Nigeria who has a great potential in tourism and rich cultural heritage and notable festivals attracts tourist not only in Nigeria but other parts of the World are not fully explored. Among many other popular festivals is the Niger Delta holds the Ikwere, Kalabari and Obirika festivals, to celebrate the water head dress that imitate the heads of fish or water birds. Many communities, including those in north, have a version of the harvest festival. Also in the north, the Argungu fishing festival occasion takes place in Argungu, in Birnin Kebbi State, during February and dates back to the 16th century. During the festival, hundreds of local men and boys enter the water armed with large fish net scoops, and the competition is to catch the biggest fish. With a population of almost 140 million people comprising of over 250 ethnic groups, Nigeria is a blend of exciting socio-cultural diversity that has produced a land of un parallel opportunities for fisheries development.
    Description: Includes:- 11 refs.
    Keywords: Fisheries ; Law ; Sociology ; Nigeria ; freshwater environment ; Sociological aspects ; Tourism ; Fishing ; Recreation
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    A review of length-weight relationship and its parameters in aquatic species (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23248 | 19325 | 2018-03-25 12:51:59 | 23248 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Length weight relationship and its parameters are requiring in practical assessment of stocks of aquatic species. The exponent b describes the growth condition of the species in question. If the value of b is 3 around 3, the fish is said to exhibit isometric growth if the value of b is less or greater than 3 the species is said to exhibit isometric growth if the value of b is less or greater than 3 the species as exhibiting both isometric and allometric conditions. Such conclusions are erroneous and misrepresentation of scientific facts. They stem from the use of inappropriate methods in estimation of the LW parameters and the authors? lack of understanding of the biological theory behind the growth conditions. To correct these erroneous presentations, the paper highlights the appropriate approach for the estimation of the LWR parameter. Large sample size. Wide size range and appropriate statistical tools are essential ingredients for accurate estimation of the LW parameters. The paper also elucidates on the concept of isometric and allometric growth in fishes and other invertebrates. A minimum of one year time scale of data collection in order to capture all the size ranges, from the young of the year to the oldest individual in the population, so as to reflect the ontogenetic growth performance of the aquatic species, have been proposed
    Description: Includes:- 4 tables.;15 refs.
    Keywords: Ecology ; Fisheries ; Ethmalosa fimbriata ; Cirrhinus reba ; Rhinomugil corsula ; Micropogonias furnieri ; Nigeria ; freshwater environment ; Length ; Length-weight relationships ; Body size ; Body weight ; Growth
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    Occurrence and dissolution of rigor-mortis in Bagrus bayad macropterus and Mormyrus rume from River Rima Sokoto (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23251 | 19325 | 2018-03-25 14:33:27 | 23251 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: A total of eighty nine samples comprising 45 B. bayad and 44 M.rume from River. Rima were subjected to evaluation of rigor-mortis occurrence and dissolution; Total weight and total length of the species were measured using electric top loading balance (16000gm) and measuring board, respectively. Stop watch and calibrated thermometer were used for recording time and temperature to determine rigor mortis duration and temperature effect. The results showed that the duration from capture to dissolution of rigor was higher in M.rume than B. bayad, despite the fact that temperature ranges were similar. Factors such as size distribution and level of exhaustion might have contributed to the variations. In the light of the above, it is recommended that factors resulting to rapid exhaustion of B. bayad be looked into with a view to lowering it and subsequent elongation of the rigor period.
    Description: Includes:- 2 tables.;10 refs.
    Keywords: Fisheries ; Bagrus bayad macropterus ; Mormyrus rume ; Nigeria ; freshwater environment ; Fish spoilage ; Quality control
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    Relationship between the rainfall, water levels, flooding and fish supply from Asa Dam (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23247 | 19325 | 2018-03-25 12:49:34 | 23247 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Studies on the relationship between the rainfall, water levels and floods in Asa Dam Ilorin, Kwara State Nigeria was carried out for twelve months to determine the impact of these parameters on the supply of fish species from this dam to Ilorin and environ. Maximum rainfall (26.14 cm) was in September. The range values of rainfall recorded during this research was zero (November / February) to 26.14 cm (September). Water levels were lowest in April (11.40 m) and highest in September (12.80 cm). Increased water levels commenced from May (11.90 m) to October (12.60 m). The flooding of the dam began as from August when the dam spillway began to overflow. Assessment of fish catch from six fishermen around the lake showed significant increase in the fish supply at the dry season when water levels were low than the wet season (P 〈 0.05). Rainfall and water levels were negatively correlated.
    Description: Includes:- 1 table.;1 fig.;14 refs.
    Keywords: Environment ; Fisheries ; Nigeria ; Asa L. ; freshwater environment ; Rainfall ; Water levels ; Flooding ; Fish catch statistics
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    The fishery of Lake Yamama, Kebbi State, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23256 | 19325 | 2018-03-25 14:42:01 | 23256 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The highlights of the Fisheries Assessment Survey conducted at Yamama Lake in Kebbi State, North-western Nigeria in 2005 is presented. There were 17 fish species found in fishermen's landings during the survey period. About 25 fishermen were found using undersized nets to catch the juveniles of these species. Fishing pressure was found to be very high. The lake is 900 m in length and 195 m wide giving a surface area of about 18 hectares. For an optimum catch, about 4 fishermen ought to have engaged in full time fishing activities if the fisheries of the lake are to be managed on a sustainable basis. However, a surplus of over 100 fishermen was recorded actively fishing during the period of the assessment. All these have a depleting effect on the abundance and sizes offish caught from the lake. A community based fisheries management system, which establishes a participatory involvement of fishermen in the conservation and rational exploitation of fisheries resources for the well being of the stakeholders is recommended for the Lake.
    Description: Includes:- 3 tables,;1 fig,;4 refs.
    Keywords: Fisheries ; Nigeria ; Yamama L. ; freshwater environment ; Stock assessment ; Catch statistics ; Catch/effort ; Fishermen ; Fishermen statistics ; Fishery statistics
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    Nutrient composition of three commercially important fishes in Lake Kainji, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23331 | 19325 | 2018-04-06 16:11:10 | 23331 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The proximate composition, mineral content and amino acid profile of Synodontis membraneceous, Oreochromis niloticus and Pellonula afzeluisi was conducted. Results showed that P. afzeluisi had the highest crude protein content (73.00%) amino acid and mineral content. This was followed by O. niloticus (57.87%) and S. membraneceous (54.56%). Organoleptic analysis however showed that O. niloticus had significant overall acceptability, taste and aroma.
    Description: Includes:- 4 tables.;13 refs.
    Keywords: Fisheries ; Synodontis membraneceous ; Oreochromis niloticus ; Pellonula afzeluisi ; Nigeria ; Kainji L. ; freshwater environment ; Nutrition ; Nutritional types ; Sodium ; Calcium ; Potassium ; Magnesium ; Phosphorus ; Amino acids
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    Physico-chemical and bacteriological investigation of fish and water in Aiba reservoir, Iwo (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23326 | 19325 | 2018-04-06 16:03:20 | 23326 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study looked into the physicochemical and bacteriological investigation of fish and water in Aiba Reservoir. Water and fish samples collected were studied to assess their bacteriological and physicochemical characteristics and their suitability for domestic purposes. Structural questionnaires were administered to the fishermen around the reservoir and experiments were carried out in the laboratory to analyze the samples. The results showed that the total viable bacteria count was high(1.02 x 105 cfu/ml) while few Staphylococcus aureus and E. coli occurred insignificantly. The population of S. aureus and E. coli in the fish gills, liver and tissue were insignificant. The results obtained from the physicochemical analysis of the water samples showed that the reservoir has optimum water temperature of 29degreesC ~c 0.25, a pH of 7.70 ~c 0.20, dissolved Oxygen level of 7.20mgO2/1 ~c 0.20 and total hardness of 45.00 mg/ICaC03 ~c 1.05. The microbial load in the fish sample is higher than that in the water sample. Further strict hygienic measures and surveillance is recommended so as to improve the water quality and to avoid deleterious effects on the health of the Iwo inhabitants and its neighboring communities who also benefit from the reservoir.
    Description: Includes:- 2 figs.;11 refs.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Aiba Reservoir ; freshwater environment ; Physicochemical properties ; Bacteriology ; Water quality ; Water ; Bacterial counters
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    Motivational factors responsible for women involvement in fish processing and marketing around Lake Kainji (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23334 | 19325 | 2018-04-07 17:10:35 | 23334 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study examined women fish processors and marketers around Kainji Lake area. 150 respondents were selected from five fishing communities. The results revealed that 46 and 32 percents of the respondents were engaged primarily in fish processing and marketing to generate income to meet the need of the family. Majority (62%) of the respondents adopted the improved smoking kiln technology while only 22% of them still used the traditional sun-drying method. The prominent problem faced by women fish processors and marketers in the study area include difficulty in accessing credit facilities (rank 1). The chi-square analysis showed a non-significant relationship (P = 0.05) between adoption of improved fish processing technologies and marital (X2 cal = 0.252; X2 tab = 3.841); monthly income X2 cal= 7.815; X2 tab= 2.427) and educational X2cal= 7.815; X2 tab= 2.619) characteristics of the respondents. It is recommended that government should provide the women fish processors and marketers with credit facilities and modem fish processing equipment at subsidized rates.
    Description: Includes:- 6 tables.;6 refs.
    Keywords: Fisheries ; Nigeria ; kainji L. ; freshwater environment ; Women ; Fishery products ; Processed fishery products
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    Relationship between fishmongers and fisher-folks: a case study of Monai, Yuna and Fakun fishing villages of Kainji and Jebba lakes (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23335 | 19325 | 2018-04-07 17:12:17 | 23335 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study assessed the relationship between fishmongers and fisherfolks in Monai, Yuna and Fakun fishing villages of Kainji and Jebba Lakes. 20 structured questionnaires were administered in each of the three villages to randomly selected fisherfolks. The study shows that low literacy and poverty level among most of the fisher-folks made them depend on fishmonger by hiring their fishing nets at exorbitant price, this has not allowed them to determine the prices of their catches, hence fishmongers have an influence on the livelihood of the fisher folks and their family.
    Description: Includes:- 3 tables.;6 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Kainji L ; Nigeria ; Jebba Lake ; Nigeria ; Monai ; Nigeria ; Yuna ; Nigeria ; Fakun ; freshwater environment ; Marketing ; Financing ; Pricing ; Market research
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    The role of women in the fishing community of Doma Dam, Nasarawa State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23337 | 19325 | 2018-04-07 17:15:33 | 23337 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study was carried out to assess the role of women in the fishing activities around the Doma dam fishing community in Nigeria. The study reveals that women participate in all fishing activities and play significant role in family income generation from gear construction, fish catch, transportation, processing to marketing of the fish and fish products. Some limitations were identified in women participation such as some cultural practices, denial to participate in decision making, poor infrastructure and lack of organised markets. Women should be encouraged to freely participate and make decision so as to enhance their finances as it will translate to enhancing the family income.
    Description: Includes:- 3 tables.;3 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Doma dam ; Women in fisheries ; freshwater environment ; Women ; Artisanal fishing ; Fishing
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    Marketing and transport of processed fish from Lake Kainji to southeast Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23341 | 19325 | 2018-04-08 11:26:45 | 23341 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Marketing of processed fish transported from New Bussa (Kainji Lake) to Onitsha (Southeast) was conducted by quantitative assessment at New Bussa. The packaged fish products were counted and weighed before loading into lorries. A total of one hundred and sixty eight fish traders were interviewed. The commercially important freshwater fish species traded from Kainji Lake to Onitsha were 〈i〉Alestes spp, Bagrus spp, Citharus citharus, Synodontis membranaceous, Clarias spp, Labeo spp, Oreochromis niloticus, Sarotherodon galilaeus〈/i〉 and, 〈i〉Tilapia zilli〈/i〉. The total weight of fish transported weekly from March - May 2007 ranged from 5,750Akg to 19,943.6kg and cost between N2, 688,000 to NlO, 178,000. The extrapolated annual transported fish products at the landing in New Bussa to South - East was 690.2 metric tonnes worth N329,888,004.00. These figures represent 7.5% of the published data on the total fish production in Lake Kainji. Marketing of processed fish from Kainji Lake is faced with constraints of bad road, spoilage of fish products due to improper smoking etc
    Description: Includes:- 3 tables.;14 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Kainji L. ; freshwater environment ; Marketing ; Market research ; Trade ; Processed fishery products ; Cured products ; Transport
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    Comparative study on the efficiency of FUTY smoking kiln and traditional smoking drum (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23347 | 19325 | 2018-04-08 11:41:40 | 23347 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Freshly caught mud catfish (Clarias anguillaris) and Tilapia (Oreochromis niloficus) collected from lake Geriyo in Adamawa state were smoked using different Kilns in order to evaluate the efficiency of the Smoking Kilns. The products from Federal university of Technology, Yola (FUTY) Improved Processor (FIP) were of better quality than the Traditional Smoking Drum (TSD). The use of these two processors revealed the profitability to fisher folks. marketers and fish farmers in the utilization of the FIP compared to the TSD as losses incurred was minimal. The qualities of the smoked Clarias anguillaris and Oreochromis niloticus were determined from their various peroxide values obtained after a 28 days storage period. The physi-cochemical parameters of the smoked samples were obtained. Products from FIP were of better quality than the TSD.
    Description: Includes:- 1 table.;1 fig.;13 refs.
    Keywords: Fisheries ; Nigeria ; Processing Fishery Products Equipment ; freshwater environment ; Processing fishery products ; Processed fishery products ; Equipment
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    Effects of preservatives on the proximate and sensory analysis of smoked-dried Clarias gariepinus during ambient storage (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23393 | 19325 | 2018-04-12 07:13:43 | 23393 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of food grade chemical and natural preservatives on the proximate and sensory analysis of smoked catfish Clarias gariepinus during six weeks ambient storage were determined. Eleven pre-smoking treatments were applied: 25% sodium chloride (NaCl) and 1% ascorbic acid for Iht 25% NaCI and 1% ascorbic acid for 30mins; 3% sodium lactate for 30mins; 3% sodium lactate and ginger (Zingiber officinale) extract for 30mins; 5% sorbic acid for 3Omins; 5% sorbic acid for 1h; 3% sodium lactate and Tetrapleura tetraptera extract for 30mins; 3% sodium lactate and Ethiopian pepper (Xylopia aethiopica) extract for 30mins; Z. officinale extract for 30mins; X aethiopica extract for 30mins and T. tetraptera extract for 30mins. The samples were smoked, cooled and packed for analysis at 0, 2, 4 and 6 weeks of ambient storage. The values of the proximate analysis ranged between 13.0-19.5%, 3.5-5.5%, 12.3-17.6% and 58.4-68.7% for moisture, ash, lipid and protein respectively. There were no significant change of proximate composition and sensory evaluation (p〈 0.05) within each treatment groups during the 6 weeks storage without refrigeration
    Description: Includes:- 9 figs.;7 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Lagos ; freshwater environment ; Preservatives ; Storage ; Fish storage ; Storage effects ; Cured products ; Food composition ; Nutritive value
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    Development of reservoir fisheries for sustainable fish production and food security in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23355 | 19325 | 2018-04-08 12:05:31 | 23355 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper appraised the reservoirs constructed for various purposes in Nigeria and prescribes cultured based fisheries for these water bodies to enhance their productivity in order to create employment, provide alternative source of income and food security to the rural people. In addition to discussing the concept of reservoir fisheries, its importance and pitfalls and prerequisites for its development, the paper provides a policy outline intended to promote reservoir fisheries in Nigeria.
    Description: Includes:- 8 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Reservoir fisheries ; Inland fisheries ; Lake fisheries ; Fishery management
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    Food borne bacterial pathogens in smoke-dried fish in Lagos markets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23395 | 19325 | 2018-04-12 07:17:16 | 23395 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Fifty samples of smoked fish were obtained from some markets in Lagos and these were analyzed for the presence of Staphylococcus aureus, Vibrio sp. and Listeria monocytogenes. All the samples tested positive for Staphylococcus aureus, 27 samples for Vibrio sp. and none for Listeria monocytogenes. This study reveals that the smoked fish sold in Lagos, could be a potential source of food borne bacterial pathogens and thus the need for improvement in processing and handling are required.
    Description: Includes:- 1 table.;17 refs.
    Keywords: Fisheries ; Health ; Nigeria ; Lagos ; freshwater environment ; Bacteria ; Pathogenic bacteria ; Cured products ; Processing fishery products
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    Potential of Tarpon (Megalops) atlanticus for sport fisheries and ecotourism development in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23399 | 19325 | 2018-04-12 07:23:17 | 23399 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The Atlantic Tarpon, Tarpon (Megalops) atlanticus is a marine fish of high commercial importance with a special fishery in western, central and south-western Atlantic Ocean where it is a very important game fish. The species provides sport fishery especially in the western Atlantic coast of America which has generated millions of dollars in tourism, employment and boat charters. Tarpon fishery in America is highly regulated and there are strict guidelines on capture, bag limits and fishing seasons. Tarpon puts up a spectacular fight when hooked, leaping up to 2-3m above water surface and landing with a smacking splash that can be heard one kilometer away. It is the leaping powers that make tarpon a favourite to anglers. In the coastal waters of south-west Nigeria especially for the natives of the coastal communities of Ondo State, T. atlanticus is a delicacy and of high economic value. Some local fishermen and fish farmers in the area stock Tarpon in their ponds purely for recreational purposes. Some of these tarpon farms were integrated with snack bars and served as tourist centres. Visitors including individuals and educational institutions frequent the fish farm during excursions and pay a stipulated fee per person as entry permit to the farm thereby generating more revenue to the farmer. This paper highlights the importance of Tarpon as a game fish and suggests strategies for development of its culture both as food fish and for ecotourism.
    Description: Includes:- 3 plates.;18 refs.
    Keywords: Fisheries ; Tarpon atlanticus ; ASE ; Nigeria Atlantic Ocean ; marine environment ; Sport fishing ; Recreation ; Tourism
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    Purse seine operations off Orimedu fish port, Lagos State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23398 | 19325 | 2018-04-12 07:21:37 | 23398 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Design characteristics and mode of operation of purse seining off Orimedu fish Port was investigated between August 2007 and February 2008.Tha fish catch composition was also analysed. The purse seine net has the highest number of bundles. The mesh size ranges from 2.5 to 05.0cm.The purse seine net was highly selective fish target specific, catching mostly coastal pelagic fish species. Ten fish species belonging to 5 families were frequently encountered. Total weight of the fish landed was 444.50kg while the average weight of the catch landed per canoe was 30.53kg respectively. Ethmalosa fimbriata (Bonga fish) and Sardinella maderensis (flat sardines) dominated the catch with 2l1.00kg (45.40%) and 143.00(32.10%) by weight of the total catch. Chloroscombrus chrysurus (Atlantic bumper fish), Caranx hippo (Crevail jack), Sphyma couardi (hammer head shark) and Carcharhinus spp.(shark) contributed between 0.33-3.47% ofthe total fish landed by weight. Total length of the fish landed also indicated that the purse seine was highly selective and does not deplete the population of sub-adult's juvenile fish species. Salinity was found to be the most variable factor affecting abundance and subsequent catch of coastal pelagic fishes particularly Ethmalosa fimbriata during the dry season. This study revealed that over fishing of fish stocks may be avoided provided the same fishing pressure observed during this study period is maintained in terms of the number of fishing crafts, number of boat days or fishing and mesh-size of the purse seine fishing gear used.
    Description: Includes:- 4 tables.;7 refs.
    Keywords: Fisheries ; Nigeria ; Orimedu Fish Port ; marine environment ; Catch statistics ; Check lists ; Species diversity ; Gear construction ; Gear research
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    Problems affecting fishers' livelihood and fisheries development in Kainji Lake Basin (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23405 | 19325 | 2018-04-12 08:56:24 | 23405 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This paper examines some critical factors related to fishers' livelihood, resource sustainability and development of fisheries sub-sector in Kainji Lake Basin (KLB). Based on empirical study the findings identified some major problems to include, lack of access to finance, deflation of resources, increase in fishers' population, extinction of some important fish species and gross lack of development activities etc. These arrays of problems form the complex nature of artisanal fisheries sub-sector, which impede substantial income generation well-being of the fishers' and development of the sector. The paper made some policy recommendations to serve as guide to relevant authorities in addressing the fishers' problems.
    Description: Includes:- 3 figs.;6 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fishery management ; Resource management ; Fishery development
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    Comparison of diploid and triploid Heterobranchus bidorsalis using Polyacryl Amide Gel Electrophoresis (N-PAGE) (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23409 | 19325 | 2018-04-12 09:02:51 | 23409 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A comparative analysis on biochemistry and Polyacryl Amide Gel Electrophresis was carried out to determine the genetic diversity of diploid and triploid Heterobranchus bidorsalis. Sixteen samples of diploid and triploid farm-raised (mean weight; 512.6g and mean length; 41.6cm) were collected and the electrophoresis analysis was conducted using 5.5% Polyacryl Amide Gel and serum protein obtained from the blood of the live samples. 0.06% Coomassie blue was used for staining the gel while a mixture of ratio 1:2 of glacial acetic acid, meethanol and distilled water was used for de-staining the gel. The diploid and triploid possessed an equal total number of 23 electrophoretic protein bands. The molecular phylogenetics of both samples revealed low genetic variability. Results of this study will serve as a baseline analysis on the current genetic diversity of H. bidorsalis in Nigeria.
    Description: Includes:- 2 figs.;8 refs.
    Keywords: Fisheries ; Heterobranchus bidorsalis ; Nigeria ; Kontagora L. ; freshwater environment ; Genetics ; Diploids ; Experimental culture ; Nutritional requirements ; Fish
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  • 136
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    Frozen and smoke-dried fish marketing in Akure metropolis (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23406 | 19325 | 2018-04-12 08:57:45 | 23406 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A survey of the prices of fish in two major markets in Akure was conducted between October and December 2008 to compare the prices of the imported fishes and that of the farmed catfishes and tilapias. The survey covered the Erekesan and NEPA markets, Akure. Both structured questionnaires and oral interview were used in data collection. The results indicated that the price of farmed catfishes was highest and that that of the tilapias was marginally lower than that of the croaker. This is evidence of better acceptability of the farmed fishes. The summary of the results showed good future for aquaculture in Nigeria, as good markets exist for the produced fishes.
    Description: Includes:- 1 table.;2 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Akure ; freshwater environment ; Marketing ; Market research ; Frozen products ; Cured products ; Dried products
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  • 137
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    Development of 2.14 M one sheet canoe (SAMPAN) for pond activities (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23416 | 19325 | 2018-04-25 19:13:12 | 23416 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 2.14 M length overall (LOA) flat bottom modern canoe (Sampan), was designed and constructed using locally available materials. The canoe features include easy construction, portability, least cost, light weight, shallow draft, and easy maneuverability. The light displacement (weight empty) was 25kg, which was less than local canoe of same size. When placed on water a draft of 5.5cm. The capacity of the canoe was 200kg, and the total production cost of N10, 000.00, ($67) which was not beyond the reach of an average fisher folks, or any fish farmer. The canoe was easily maneuvered when propelled by paddling as it floated at a shallow draft; this makes the canoe adequate for use on shallow water bodies such as ponds and reservoirs. The craft, because of its easy maneuverability, can also be used on shallow water bodies for recreational activities such as, sport fishing and canoeing.
    Description: Includes:-3 tables.;2 figs.;2 plates.;6 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; New Bussa ; freshwater environment ; Canoes ; Artisanal fishing ; Surface craft ; Boats ; Design ; Construction
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  • 138
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    Mangrove ecosystem and challenges of sustainable fish production in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23369 | 19325 | 2018-04-08 18:10:00 | 23369 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Nigeria has vast expanse of mangrove ecosystem of about 1 million ha. Presently the total fish production from the artisanal, industrial, and aquaculture sectors is above 635,370 metric tonnes (mt) annually. The current fish demand in Nigeria is 1.66 mt hence leaving a deficit of about 1 mt which translates to about $1.6 billion on importation. Meanwhile, it has been estimated that if only 30-35% of the available mangrove areas suitable for aquaculture is fully harnessed, that the country has the potential to produce over 3 mt of fish annually from the sector. This means that Nigeria will be in a position to produce enough fish for the population and be export orientated too. The paper presents the challenges that militate against sustainable fish production in the mangrove ecosystems and the solutions for improved production.
    Description: Includes:- 1 table.;5 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Mangrove Ecosytems ; freshwater environment ; Mangroves ; Fishery management ; Mangrove swamps ; Ecology
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  • 139
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    Effects of bait types on fish congregation and catch efficiency of castnet in Lake Kainji (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23372 | 19325 | 2018-04-10 16:08:03 | 23372 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of baits, rice bran (Oryza sativa L.) and corn bran (Zea mays L.) on fish aggregation and catch efficiency of castnet in Lake Kainji was conducted. 25.4mm stretched mesh size multifilament (PA) nylon net was used for the construction of castnet. The experiment was Complete Randomized Design (CRD) with three replications for nineteen consecutive fishing days. Three treatments were employed; castnetting after baiting with rice bran, with corn bran, and castneting without bait (control). Thirteen fish species were caught from eight families. The number of fish caught was 336, of which 48.5 and 27.1 % were caught with corn bran and without bait while castnetting with rice bran recorded the least (24.4%). The biomass of fish caught was 4627.7g (4.6kg) of which the highest percentages 51.4 and 28.6% followed same trend as that of number of fish caught. Comparison of the overall number and biomass of fish capture indicated that Tilapia zillii ranked highest, followed by Citharinus citharus and Hydrocynus forskalii.
    Description: Includes:- 2 tables.;10 refs.
    Keywords: Fisheries ; Nigeria ; kainji L. ; Bait ; Catch/effort ; Catching methods ; Cast nets ; Fishing gear ; Gear research
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  • 140
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    Attitude of fisher folks towards adoption of extension activities in lower Kainji Lake Basin (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23390 | 19325 | 2018-04-12 07:06:26 | 23390 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study examined the attitude of fishermen towards extension activities in the lower Kainji Lake Basin, Niger State. Simple random sampling technique was used to select five fishing villages from which 100 fishermen were drawn for the study. Structured questionnaire was developed in lined with the objectives to obtain information from respondents. Data collected were analyzed using frequencies and % counts. Majority (52%) of the fishermen was in their prime age and 57% had completed one formal education or the other. It also indicated that 67% had 〉20 years experience in fishing activities, 40% use gill nets that gave 95% of respondents fishing gear maintenance job. About 64% of respondents reported irregular extension visits though 72% perceived extension service to be useful and that information on fisheries were obtained from the research institute (57%) which enhanced the income of 65% of the fisherfolks. Recommendations were made on how to enhance extension delivery and adoption in the lake.
    Description: Includes:- 6 tables.;6 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; kainji L. ; Extension Services ; freshwater environment ; Technology transfer ; Information services ; Fishermen
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  • 141
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    Effects of square mesh bunt on by-catch reduction in white shrimp Nematopalaemon hastatus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23397 | 19325 | 2018-04-12 07:20:09 | 23397 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Simultaneous paired fishing comparison of modified codend against conventional codend was done with shrimp beam trawl in near shore sea off Lagos.The modified codend was designed to reduce by-catch and was made by incorporating square mesh panel at anterior bunt. Results showed that the square mesh codend significantly reduced the by-catch of juvenile fishes up to 39.35% (T-test, P 〈 0.05; 0.01) with no significant loss (2.9%) in the quantity of the target shrimps Nematopalaemon hastatus (P 〉 0.05; 0.01). Commercially important by-catch species having a total length of 11-30cm were retained by the square mesh codend, while those with total length of 4-10cm were reduced eg; Pseudotolithus elongatus (43.96%, P 〈 0.05, 0.01), P. senegalensis (49.03%, P 〈 0.05; 0.01), P. typus (36.29%, P〈 0.05; 0.01), llisha africana (39.09%, P〈 0.05; 0.01), Pentanemus quinquarius (41.02%, P〈 0.05; 0.01), Galeoides decadactylus (48.80%, P〈 0.05; 0.01), Lutjanus dentatus (48.98%, P〈 0.05; 0.01), Drepane africana (43.13%, P〈 .0.5;0. 01), Chloroscombrus chrysurus (55.29%, P〈 0.05; 0.01), and Selene dosalis (34.60%, P〈 0.05; 0.01). At family level, reduction in the number of 8 out of 13 important by-catch families analyzed were significant, e.g.; Clupeidae, Trichiuridae, Sciaenidae, Serranidae, Polynemidae, Carangidae and Lutjanidae (P〈 0.05; 0.01). The number of flattened fishes (Cynoglossus senegalensis), Spinous fishes (Arius latiscutatus), shell fishes with morphometric body protection (Callinectes amnicola) were not significantly reduced (P〉 0.05).
    Description: Includes:- 3 tables.;3 figs.;21 refs.
    Keywords: Fisheries ; Nematopalaemon hastatus ; Nigeria ; Lagos ; marine environment ; By catch ; Fishing gear ; Shrimp fisheries ; Gear selectivity
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    Crab value chain in Lagos Lagoon complex: implications for food security in a recession economy (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23396 | 19325 | 2018-04-12 07:18:42 | 23396 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study aims at bridging the knowledge gap in respect of production and marketing of crab fisheries in Lagos lagoon complex of Lagos State, Nigeria. The data have been collated through specific survey carried out between August 2008 and April 2009 in each of the five lagoon systems of Lagos State including Badagry, Ologe, Lagos, Epe and Lekki lagoon. The production systems and targeted clientele of each lagoon differ greatly. The profit margin per unit weight retained at each stage of transaction was relatively low. The crab fishery was observed to be economically viable because of the large turnover and small size of individual operations. The crabs plays significant role in the livelihood of the fisher folks and are very important as export commodity in West Africa.
    Description: Includes:- 4 tables.;7 refs.
    Keywords: Biology ; Fisheries ; Nigeria ; Lagos Lagoons ; freshwater environment ; Marketing ; Crab fisheries
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  • 143
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    Effects of diesel-oil spillage of fresh, brackish and marine waters on polyvinyl-alcohol (PVA) synthetic fishing twine (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24184 | 19325 | 2018-05-16 14:38:37 | 24184 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of diesel-oil spillage of fresh (0.4ppt), brackish (25ppt) and marine (37ppt) waters on elongation (cm) and breaking load (kgf) of artisanal PVA synthetic twine of varied diameter (4mm, 6mm, 8mm and 10mm) soaked for 16 weeks was studied. Chemical (solubility) test was carried out to identify the experimental twine as PVA among other synthetic twines. The elongation (cm) and breaking load (kgt) of PVA twine diameters were tested by tensile-strength gauge machine (0-200kg) and was carried out in unpolluted (control) and polluted states (spillage level) at 0%, 20%, 40%, 60%, 80% and 100% diesel-oil concentrations of different water salinity. Factorial statistics was used to analyze the treatments; twine (at four levels), water salinity (at three levels) and concentrations (at six levels). This implies 4 by 3 by 6, replicated in four places (288 treatments). Results indicated that elongation (cm) and breaking load (kg) of the specimens were significantly (P〈0.05) influenced by twine thickness. Twine l0mm soaked in 3.0 litres of unpolluted freshwater had significant (p〈0.5) correlation coefficient r,0.927 and lowest r- value of 0.499 was obtained in twine 4mm soaked in 100% diesel-oil concentration. Significant (P 〈0.05) relationships were observed between the correlation coefficient r = 0.531-0.927 for unpolluted and r = 0.499-0.592 for polluted tests. The study revealed that diesel-oil spillage had negative effects on the quality of twines. The thicker the PVA twine diameters (10, 8, 6 and 4mm) at lowered (0%, 20%, 40%,60%,80% & 100%) diesel-oil spillage of fresh (0.4ppt), Brackish (25ppt) and Marine (37ppt) waters respectively, the higher the significant (P〈0.05) elongation (cm) and breaking load (kgt) were evaluated in most cases.
    Description: Includes: 4 tables.;Also includes: 12 references.
    Keywords: Conservation ; Fisheries ; Nigeria ; Ogun State ; Diesel-Oil ; PVA synthetic fishing twine ; Freshwater ; Brackishwater ; Marine water ; brackishwater environment ; freshwater environment ; marine environment ; Fuels ; Crude oil ; Synthetic fibres ; Yarns ; Saline water ; Fresh water ; Brackish water ; Netting materials ; Gear research ; Tensile strength ; Materials testing ; Comparative studies
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    Effects of NIOMR smoking kiln and oven on the crude protein, minerals and vitamins of catfish Clarias gariepinus (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24197 | 19325 | 2018-05-16 15:16:21 | 24197 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of two different preservative methods, NIOMR Smoking Kiln and Oven drying on Crude Protein minerals and Vitamin of clarias gariepinus were studied. Clarias gariepinus were obtained from the fish farm of African Regional Aquaculture Centre, Aluu, Port Harcourt. The crude protein, minerals and vitamins of the fresh fish were determined immediately while two other batches were separately dried using oven at 50~'C for 30minutes and NIOMR Smoking Kiln at 70~'C for 3 hours. Result of the crude protien of fresh fish was 21.84 ~c 1.10 which increased to 59.53 ~c 1.88 and 35.41 ~c 1.00 in both NIOMR smoking and oven, respectively. This means that, there was a significant different in both dryers on the crude protein. This will improve the knowledge and capacity of rural women and agricultural communities on the appropriate processing method for fish. The mineral and vitamins of oven dried and NIOMR Smoking kiln were analyzed. The vitamin content of both the fish, dried and smoking kiln shows no significant different except in vitamin A which was significant (p〈0.05).There was significant different (p〈0.05) in the mineral content of the two different drying method except in sodium, Potassium and Phosphorus of the drying method. This result indicates that the two drying methods have effects on the nutritional quality of catfish.
    Description: Includes: 2 tables and 1 figure.;Also includes: 7 references.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Port Harcourt ; Smoking ; Production ; Preservative research ; Quality ; freshwater environment ; Processing fishery products ; Freshwater fish ; Proteins ; Vitamins ; Minerals ; Cured products ; Quality assurance ; Aquaculture equipment ; Nutritive value ; Drying ; Methodology ; Comparative studies
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    Fatty-acid composition of Macrobrachium vollenhovenii in Ogun estuary, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24200 | 19325 | 2018-05-16 15:22:08 | 24200 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was carried out on the fatty-acid composition of Macrobrachium vollenhovenii (African river prawn) in Ogun estuary, Ogun State, Nigeria. Sexes and size groups were considered during the study. Fatty-acid analysis was done in triplicates and data obtained were analyzed using descriptive statistics, analysis of variance and Duncan's multiple range tests. Fatty acids analysed which included oleic acid, linoleic acid,' stearic acid, myristic acid, palmitic acid and lauric acid were classified into saturated and monounsaturated fatty acids. All values of saturated fatty acids were higher in female (29.64%) than in male (25.50%) p〈 0.05. So also the monounsaturated fatty acid also showed higher value in female (29.64%) than in male (25.50%). All fatty- acid values were higher in female M. vollenhovenii than in male. Meanwhile, myristic acid was highest in the two sexes and the combined sexes, (35.68% female), (33.14% male) and (34.74% combined sexes). The fatty-acid components were not influenced by the size of the fish. This study clearly indicated that the nutritive value of M. vollenhovenii is quite well comparable to the edible species of decapods already studied (shrimps, prawns and lobsters) and could be included in both human and livestock diets.
    Description: Includes: 2 tables and 1 figure.;Also includes: 10 references.
    Keywords: Fisheries ; Macrobrachium vollenhovenii ; Nigeria ; Ogun Estuary ; Fatty ; Composition ; Macrobrachium ; Ogun ; Estuary ; freshwater environment ; Shrimp fisheries ; Acidity ; Fatty acids ; Estuarine fisheries ; Chemical composition ; Nutritive value ; Sex ratio ; Males ; Females ; Freshwater crustaceans ; Human food ; Feed
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  • 146
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    Gut contents and feeding pattern of Macrobrachium vollenhovenii (Herklots, 1857) and Caridina africana (Kingsley, 1882) at Asejire Lake and Erin-Ijesa waterfalls, South Western Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24207 | 19325 | 2018-05-19 06:38:21 | 24207 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study with intent towards acculturation was carried out on the gut conients and feeding patterns of Macrobrachium vollenhovenii and Caridina africana occurring at Asejire lake and Erin-Ijesa Waterfalls respectively for two years using numerical abundance and frequency of occurrence methods of analysis. There was a strong correlation (p〈0.05) between prawn abundance and food availability, The gut content analysis of M. vollenhovenii revealed that juveniles were predominantly zooplanktivorous, feeding on copepods and rotifers while the adults were omnivorous, utilizing a wider variety of animal foods than plant materials. This changing of diets and patterns as the species advances in age has an implication for its culture potentials. Stomach fullness index was high during the wet season which coincided with high abundance of prawns, C. africana fed mainly on diatoms, zooplankton and other micro-phytoplankton, thus an onmivore with herbivorous tendency. The availability of both species in fresh water bodies and their foods revealed that both species can be cultured in earthen ponds since their unspecialized flexible dietary habit is an optimal strategy for sustained productivity.
    Description: Includes: 3 tables and 1 figure.;Also includes: 12 references.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Macrobrachium vollenhovenii ; Caridina africana ; Nigeria ; Asejire L. ; Nigeria ; Erin-Ijesha waterfalls ; Macrobrachium vollenhovenii ; Caridina fricana ; Gut content ; Accumulation ; Asejire Lake ; Waterfalls ; freshwater environment ; Shrimp fisheries ; Lake fisheries ; Animal nutrition ; Abundance ; Frequency ; Food availability ; Zooplankton ; Stomach content ; Breeding ponds ; Shrimp culture ; Food organisms ; Feeding behaviour
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    Effects of freezing on the proximate composition and sensory quality of stored African catfish (Clarias gariepinus) and tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24189 | 19325 | 2018-05-16 14:59:40 | 24189 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The objective of this study was to determine the quality deterioration of African catfish Clarias gariepinus and Tilapia, Orechromis niloticus stored at-4~'C for 8 weeks. Weekly analysis was conducted to measure protein, moisture, crude fat and ash content and evaluation of the sensory quality. The result clearly reveals that during storage, both the samples showed a highly significant (p〈0.05) decreasing trend in protein, lipid, ash and moisture content. The result shows that protein, moisture, fat and ash content of the fish samples decreases with increasing duration of frozen storage. The fresh samples has the highest value of protein, moisture, fat and ash content while the least value was recorded on the 8th week. 19.98 ~c 2.66%, 80.71 ~c 1.65%, 3.92 ~c 0.5% and 2.52 ~c were recorded for freshly prepared Clarias gariepinus respectively while 12.62 ~c 1.22%, 66.86 ~c 0.68%, 1.08 ~c 1.04% and 1.14 ~c 0.33% were recorded on the 8th week respectively. 20.80 ~c 1.46, 60.75 ~c 2.50, 9.75 ~c 2.50% and 5.85 ~c 2.51% were recorded for freshly prepared Oreochromis niloticus respectively while 25.05 ~c 2.20%, 47.60 ~c 2. 15%, 7.1 ~c 0.20 and 3.00 ~c 2.10% were recorded on the 8th week respectively. After 8 weeks, the total decrease was 7.36%, 13.85%, 2.84% and 1.38% respectively for Clarias gariepinus and 3.75%, 13.45%, 2.65% and 2.85% respectively for Oreochromis niloticus. Sensory evaluation of the fish samples revealed that quality, texture, colour, odour, aroma and taste decrease with increasing duration of storage and best quality obtained when freshly prepared.
    Description: Includes: 4 tables.;Also includes: 11 references
    Keywords: Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Owo ; Frozen ; Fish ; Quality ; Sensory ; Evaluation ; Processing ; freshwater environment ; Chemical composition ; Freshwater fish ; Receptors ; Deterioration ; Quality assurance ; Fish storage ; Freezing storage ; Nutritive value ; Microorganisms ; Enzymatic activity ; Processing fishery products ; Storage effects ; Organoleptic properties ; Temperature effects
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    Toxicity of oil-based drilling mud (OBM) on the survival of the fingerlings of Niger Delta mudskipper, Periophthalmus papilio (Boch and Schneider, 1801) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24221 | 19325 | 2018-05-19 07:04:22 | 24221 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The toxicity of oil - based drilling mud on the survival of the fingerlings of Niger Delta mudskipper, Periophthalmus papilio were studied using static plastic tanks. The exposure period lasted for 96 hours. Lethal concentration (LC50) and lethal time (LT50) were determined. The control tanks contained no oil- based drilling mud. Results revealed increased in mortality values of the fish to all lethal concentrations. There was no mortality observed in the control tank. The oil- based drilling mud were toxic on Periopthalmus papilio.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Pollution ; Periophthalmus papilio ; Nigeria ; Rumuche River ; Drilling fluid ; Mortality ; Lethal concentration (LCsub50/sub) ; Bioassay ; freshwater environment ; Toxicity ; Drilling platforms ; Drilling ; Mud ; Fingerlings ; Freshwater fish ; Survival ; Pollution effects ; Mortality ; Lethal effects ; Drilling fluids ; Experimental research ; Toxicity tests
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  • 149
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    Trace metals in water, fish and sediments from Elechi Creek, Port Harcourt, River State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24220 | 19325 | 2018-05-19 07:02:08 | 24220 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The concentration of trace metals: Cadmium (Cd), Lead (Pb), magnesium (Mn), Nickel (Ni) and Zinc (Zn) were determined in water, sediment and fish tissues (S. melanotheron) collected from Elechi creek in Port Harcourt, Nigeria between October and November, 2010. The overall mean concentrations of the trace metals (Mg/g dry weight) in all combined samples ranged from 0.06-0.24 (Cd), 0.59-2.39 (Pb), 0.08-1.15 (Mn), 0.15-0.48 (Ni) and 0.18-7.04 (Zn) respectively. The concentration of the trace metals in water, fish and sediments were in the following order: Pb 〉Ni 〉Zn〉Cd 〉Mn; Zn〉Pb 〉Mn〉Ni 〉Cd and Zn〉 Pb〉Mn〉Ni〉Cd respectively. Except in water, Zinc had the highest value while cadmium had the lowest value. Mn concentration in fish tissue was greater than WHO/FAO certified values. Correlation coefficients between pairs of metals concentration show that all metals positively correlate except Cadmium and Nickel. Elechi creek is not heavily burdened with metals, but aquatic environment should be monitored periodically to avoid excessive intake of trace metals by human.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Limnology ; Pollution ; Sarotherodon melanotheron ; Nigeria ; Elechi Creek ; Trace metals ; Elechi Creeks ; S. Melanotheron ; Sediments ; brackishwater environment ; Trace metals ; Pollutants ; Pollution effects ; Pollution monitoring ; Water analysis ; Brackishwater fish ; Sediment pollution ; Brackishwater pollution ; Heavy metals ; Lead ; Cadmium ; Zinc ; Nickel ; Magnesium
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  • 150
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    Microbiological status of water and fish samples from Jabi Lake, Abuja (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24224 | 19325 | 2018-05-19 07:11:26 | 24224 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Jabi Lake is a natural water body in Abuja Federal Capital Territory (FCT). It was expanded for commercial fishing following relocation of Nigeria's headquarters to Abuja in 1993. Quantitative analysis of microbiological status of water and fish from the Lake was carried out. Samples were collected from the dam site, open water, middle lake and inlet. Result reveal that total coliform count which are indicators of pollution are high (2.0 x 103 cfu/ml, 1.1 x 103 cfu/ml, 1.0 x 103 cfu/ml and 1.1 x 103 cfu/ml for dam site, open water, middle lake, and inlet respectively). Total viable count too is high (9.2 x 103 cfu/ml, 4.9 x 103 cfu/ml, 4.6 x 103 cfu/ml and 4.9 x 103 cfu/ml for dam site, open water, middle lake and inlet respectively). There are no coliform bacteria in the muscle of the fish. High bacterial load is an indication of biological pollution and these calls for restraint on the side of those who are using the lake as site for refuse dump.
    Description: Includes: 10 references.
    Keywords: Fisheries ; Pollution ; Nigeria ; Jabi Lake ; Jabi lake ; Water ; Fish ; Bacteria ; freshwater environment ; Microbiology ; Fish ; Pollution ; Water pollution ; Lake fisheries ; Fishery surveys ; Bacteria ; Baseline studies ; Water sampling ; Microbial contamination ; Muscles ; Freshwater fish ; Pollution surveys ; Water analysis ; Freshwater pollution
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  • 151
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    Solar drying: an alternative to fish drying - a review (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24198 | 19325 | 2018-05-16 15:18:03 | 24198 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Energy is one of the main concerns for the future development of any nation. It is by far the largest merchandise in the world and an enormous amount of it is extracted, distributed, converted and consumed in our global society daily .One major problem regarding agricultural produce is related to the product storage in the harvesting season, and identifying an alternative to marketing fresh produce. A useful option is to prevent wastage of produce by drying, using solar energy. In this regard, solar dryer for domestic as welI as industrial usage could be an effective alternative of saving conventional energy. Utilization of solar thermal energy through solar dryer is relatively in a nascent state in our country. This paper gives a description of the efforts made under several researches to design and develop some types of solar dryers.
    Description: Includes: 23 references.
    Keywords: Fisheries ; Environment ; Nigeria ; Makurdi ; Solar drying ; Dryres ; Drying methods ; Drying system ; Solar dryer ; freshwater environment ; Drying ; Fishery products ; Energy ; Processing fishery products ; Utilization ; Storage ; Aquaculture equipment ; Conservation
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  • 152
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    Shrimp by-catch species from industrial shrimp trawl fisheries in Lagos, Nigeria coastal waters (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24199 | 19325 | 2018-05-16 15:19:23 | 24199 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A fisheries-dependent surveys was conducted to identify and quantify the species composition of shrimp by-catch and its effect on fishery sustainability. Samples were bought monthly, from October 2009 to June 2010 from landings site, at Apapa-Liverpool market Lagos. 25 fish species belonging to 18 families targeted in other inshore fisheries constituted the by-catch species. The percent of weight compositions of some economically important by-catch species were: Pseudotolithus senegalensis (5.76%),Ilisha africana (14.65%), Pentanemus quinquarius (2.94%), Pteriscion peli (6.60%), Galeoides decadactylus (3.17%), Cynoglossus senegalens is (6.76%) and Chloroscombrus chysurus (10.81%). About 80% of the shrimp by-catch species were juvenile fin fish. However, continuous harvest without appropriate mitigating measures poses a threat to sustainability of coastal capture fisheries. Recommendations are proffered in order to conserve the resources for sustainable development.
    Description: Includes: 1 table.;Also includes: 8 references.
    Keywords: Fisheries ; Pseudotolithus senegalensis ; Ilisha africana ; Pentanemus quinquarius ; Galeoides decadactylus ; Cynoglossus senegalensis ; Chloroscombrus chysurus ; ASE ; Nigeria ; Lagos Lagoon ; By-catch ; Coastal ; Shrimp trawl ; Fisheries ; Industry ; marine environment ; Shrimp fisheries ; Fishery surveys ; By catch ; Check lists ; Sustainability ; Resource conservation ; Trawl nets ; Coastal fisheries ; Artisanal fishing
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  • 153
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    Fisheries and tourism potentials of Agbokim waterfalls, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24196 | 19325 | 2018-05-16 15:14:22 | 24196 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Human activities in natural environments are among the most important recreational needs. Monthly studies of tourism characteristics was conducted during wet and dry seasons, over a two year period in the three landscapes along the 6817.7m length of Agbokim waterfalls by using a close-ended pre-coded survey instrument. Through MANOVA analysis of the 1780 respondents, we found strong positive association between peoples visits to the recreational areas and the type of landscape in which the respondents felt happy. People who felt happier in landscape dominated by waterfalls, visit the middle reaches of the river for outdoor recreation more often, while people who feel happy in landscapes dominated by slow water current with an extensive wide area and floodplains, visit downstream reaches of the waterfalls more often. Activities performed more often along downstream reaches include fishing, bathing/swimming, boating and hunting while more frequent activities in the middle reaches (waterfalls) include taking photographs, picnics, enjoying nature, outing with family and friends, looking at view, resting and relaxing.
    Description: Includes: 1 table.;Also includes: 18 references.
    Keywords: Fisheries ; Law ; Nigeria ; Cross River ; Agbokim waterfalls ; Fishing activities ; Recreational activities ; Landscape ; Waterfalls ; freshwater environment ; Fisheries ; Tourism ; Recreation ; Water bodies ; Surveying equipment ; Seasonal variations ; Bathing ; Current observations ; Fishing ; Sociological aspects
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  • 154
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    Prevalence of Camallanus cotti in Poecilia reticulata obtained from some waste water drains in Lagos State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24239 | 19325 | 2018-05-20 05:29:09 | 24239 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One way to diversify Nigeria's economy is to improve on agricultural activities with low import input but high export potential such as the promotion of the ornamental fish industry. Poecilia reticulata is one such fish species that enjoys international acceptability. However, a potential bottleneck in its international trade is the decertification of exports from Nigeria in the uncertainty of standing parasite fauna of locally available stock of Poecilia reticulata. Four Streets in different local government areas of Lagos State were identified with existing populations of P. reticulata where collection of samples with a scoop net was done before sorting into 60 male and 60 female individuals per wastewater drain from each Street was carried out monthly between March, 2004 and February, 2005. Temperature, pH, Dissolved Oxygen (DO), water transparency and drain depth were measured with mercury-bulb thermometer, ARH-l CE electronic meter, Oxyguard electronic probe, secchi disc and calibrated pole respectively. Chi-square was used to test for sex-related differences in prevalence and ANOVA for differences in physicochemical analyses. Only 3.4% of the 4,320 samples examined were infected with C. cotti. There was no sex-related differences in the prevalence of C. cotti while only Dissolved oxygen (DO), transparency and drain depth were found to be significantly different among the wastewater drains on the four Streets. The highest prevalence of 15.0% was obtained in P. reticulata females obtained from Igi-Olugbin and Adenaike Alagbe Streets in September, 2004. High prevalence clustering, correlated with receding rains. However, mean monthly temperature, transparency and drain depth were significantly different across drain (p〈0.05). P. reticulata obtained from these four Streets can be further exploited for import substitution and export market since this prevalence level can be managed and does not rival records of C. cotti in other popular export sources in Asia.
    Description: Includes: 11 references.
    Keywords: Ecology ; Fisheries ; Health ; Poecilia reticulata ; Camallanus cotti ; Nigeria ; Lagos State ; Poecilia reticulata ; freshwater environment ; Ornamental fish ; Fishery industry ; Fish ; Waste water ; Exploitation ; Trade ; Comparative studies ; Shellfish ; Parasite control ; Endoparasites ; Parasitic diseases ; Freshwater pollution ; Drainage water
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  • 155
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    The comparative histological studies of the testis in the wild and cultured African catfish species (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24211 | 19325 | 2018-05-19 06:44:45 | 24211 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The comparative study of the structure of testes of both the cultured and wild Male Clarias species was carried out with the aim of highlighting the possible differences in the testicular structure between them. The data were analysed based on the Regression and Correlation Analysis to examine the relationship between and within the data using Microsoft Excel data analysis tool. The Samples of the testes were fixed in Bouin's fluid for 72 hours. The tissue samples were passed through graded concentrations of alcohol at 50%, 70%, 90%, and absolute alcohol (100%) in order to achieve dehydration. The tissues were cleared in two jars of xylene for one hour and then embedded after passing through the four changes of paraffin wax at 60~'C. Paraffin sections of 5. Micron thick were obtained on a microtome. These were mounted on clear albuminized slides after floating on a warm water bath and then dried in an oven and stained with Haematoxylin and Eosin (H & E). At the same time, some of the cut sections of the testes were stained with Periodic Acid Schiff (PAS) reagents. All the slides were examined under the light microscope. On the slides stained with H&E and PAS, the histological features of the testis were evaluated and the histomorphometry of the testes determined. The findings of this work showed that there was no histological difference in the testicular structure of both domestically reared and wild strains of Clarias gariepinus species. At the end of the experiment, this work showed that testicular structure of Clarias gariepinus in the cultured and the wild are histologically similar.
    Description: Includes: 12 references.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Ogun State ; Cultured ; Sexually gravid ; Histology ; Clarias gariepinus ; Testicule ; freshwater environment ; Freshwater fish ; Testes ; Males ; Comparative studies ; Histology ; Fish culture ; Stocks ; Cultured organisms
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  • 156
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    Threats to fish biodiversity conservation in Echara River, Ebonyi State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24111 | 19325 | 2018-05-16 14:20:32 | 24111 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study on threats to fish species conservation in Echara River, Nigeria was carried out from September 2009 to February 2011 to generate inferential data for Fisheries policy formulations to assess the potential of the Fishery to alleviate malnutrition among the poor in the rural communities, and use of the living resources for teaching and research. A total number of 709 fishes comprising of Fin-fishes and shell-fishes belonging to 13 families, 19 genera and 40 species were caught in 216 fishing efforts, at 10 days interval using hooks and lines (size 13), cast nets, gill nets and traps of mesh sizes of 50mm, 75mm and l00mm respectively. Fish identification was done using taxonomic keys. Evaluation of fishing methods of the Artisans within the basin was by visual survey and the use of structured questionnaires. It was observed that during the dry season, 55% of artisanal Fishers used obnoxious methods to catch fish, ranging from chemical toxicants (14%), unselective Fishing gears (35%) and direct draining (6%). It was concluded that there is an urgent need for monitoring the impacts of human activities on freshwater systems and to evolve appropriate implementable management strategies, backed up by political will to check anthropogenic impacts that have deleterious effects on the fishery.
    Description: Includes: 2 figures and 1 plate;Also includes: 8 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Ebonyi R. ; freshwater environment ; Fish ; Biodiversity ; Conservation ; Inland water environment ; Taxonomy ; Identification ; Species ; Catching methods ; Evaluation ; Artisanal fishing ; Collisions ; Overexploitation ; Pollution ; Climatic changes ; Fishery surveys ; Fishery policy
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  • 157
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    The status of shrimp (Penaeus monodon) and prawn (Macrobrachium vollenhovenii) farming in Cross River State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24110 | 19325 | 2018-05-16 14:17:24 | 24110 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A survey on the status of shrimp and prawn farming in Cross river state was carried out in March, 2011. The survey was conducted using structured questionnaires and visits to potential sites. Data obtained through the analysis of the questionnaires indicated that seventy seven percent (77%) of the respondents were within the age bracket of 2l-50 years which fell within the active age while ten percent (10%) of the respondents were above 60 years. The educational background of the respondents showed that forty percent (40%) had tertiary education, 5.7% had technical education, 28.5% secondary education and 11.4% had primary education. The survey revealed that there was no shrimp or prawn farming in the state at the time of visit. Majority of the shrimp production activities were mainly from the capture fisheries, including both artisanal and industrial fisheries. A number of fisher folk interviewed were very enthusiastic to venture into shrimp and prawn farming if the technology for the propagation of the species were made available to them. Successful development of shrimp/prawn culture technology and dissemination will enhance aquaculture production of the species thereby creating employment opportunities and alleviating poverty.
    Description: Includes: 3 tables and 3 figures;Also includes: 7 refs.
    Keywords: Aquaculture ; Fisheries ; Penaeus monodon ; Macrobrachium vollenhovenii ; Nigeria ; Cross River ; Status ; Shrimp ; Prawn ; Culture ; Cross river state ; marine environment ; Shrimp culture ; Prawn culture ; Aquaculture products ; Artisanal fishing ; Fishery surveys
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  • 158
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    The nature of fishing community in Nigeria: a case study of Itowolo fishing community, Lagos (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24109 | 19325 | 2018-05-16 14:11:01 | 24109 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Itowolo is a fishing village being boarded with Lagos lagoon on nearly every side except the southern part which opened to the Ikorodu road from Mile 12 part of Agboyi - Ketu Local Council Development Area. During the raining season, the water level increases which possibly cause flood at heavy down pour while low water level of higher salinity during the dry season. The indigenes are primarily fisherfolks and they are effective in their fishing activities by having individual functional canoe ranging from small unmotorised paddled dugout type to outboard ones. The main gears used for fishing in the area are cast nets, gill nets, traps, hooks and lines among which cast net is prominently used Their landings during the raining season involve different species of fishes such as Heterobranchus species, Heterotis species, Channa species including others while tilapia of different species take the greatest percentage of their catches during the dry season. The shrimps top the population of catches between the months of July September. The dwellers during off fishing season engage in other economic activities that generate income such as petty trading, palm tapping, fuel wood trading, transport business, mat making, hairdressing, fashion designing, computer business centres and telecommunication vendors. In general, fishing activities are characterized by low unit productivity, intensive labour, relative low capital, low operational costs and limited gear coverage. High post harvest losses are usually experienced due to lack of suitable storage facilities which eventually lead to relative low profit.
    Description: Includes: 3 tables and 3 figures;Also includes : 5 refs,
    Keywords: Fisheries ; Sociology ; Nigeria ; Fishing communities ; Fishing household and change ; Artisanal fishing ; Fishing vessels ; Fishing gear ; Cast nets ; Fish ; Catch statistics
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  • 159
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    Length-weight relationships of Hyperopisus bebe occidentalis in Zaria Dam (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24631 | 19325 | 2018-05-22 06:33:31 | 24631 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: The morphometric parameters of 54 Hyperopisus hebe occidentalis obtained from Zaria Dam were investigated. The length occidentalis examined ranged from 18.9-41.0 cm and weight ranged from 25-425g, the largest male weighed 175g while the female was 425g. The length-weight relationship of H. Bebe occidentalis in Zaria showed a positive correlation (r=0.897) in both regression exponent (b〉3) for both sexes showed positive allometric growth pattern. The mean condition factor obtained (0.95- 1.26). In both sexes, the condition factor generally increased with increase in individual size of the fish irrespective of sex but slightly in male than female.
    Description: Includes: 13 references.
    Keywords: Ecology ; Fisheries ; Hyperopisus bebe ; Nigeria ; Zaria Dam ; Microbiological ; Proximate analysis ; Biochemical characterization ; S. nigrita ; Mormyruss ; C nigrodigitatus ; freshwater environment ; automation
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  • 160
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    Comparison of microbiological and proximate analysis of Synodontis nigrita, Chrysichthys nigrodigitatus and Mormyrus rume in Olomore market, Abeokuta, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24632 | 19325 | 2018-05-22 06:35:03 | 24632 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was carried out to compare the microbiological and proximate analysis of fresh Synodontis nigrita, Mormyrus rume and Chrysichythys nigrodigitatus sold at Olomore market, Abeokuta, Ogun State. This fish are always available at Olomore market and other market around Abeokuta and its environment. The protein, carbonhydrate, moisture, and ash of the fishes was based on the method of analysis of the Association of Official Analysis (AOAC:1990). Data for each sp. were subjected to analysis of variance (ANOVA). The Results show no significant difference in moisture content of Chrysichthys nigrodigitatus (70.99 ~c 1.09%), Mormyrus rume (67.30 ~c 4.08%) and Synodontis nigrita (67.33 ~c I.99%). The crude protein content of Chrysichthys nigrodigitatus (12.10 ~c 0.74%) Mormyrus rume ( 15.48 ~c 1.63%) and Synodontis nigrita (I0.73 ~c 0.61%). For carbohydrate content we have Chrysichthys nigrodigitatus (1.15 ~c 0.13%9), Mormyms rume (2.09 ~c 0.20%) and Synodontis nigrita (2.04 ~c 0.10%). Fat content of Chrysichthys nigrodigitatus (7.15 ~c 1.29%) Mormyrus rume (8.97 ~c I.9%) and Synodontis nigrita (8.62 ~c 0.89%) and for ash content of Chrysichthys nigrodigititus (6.33 ~c 0.69%), Mormyrus rume (4.89 ~c 0.21%) and Synodontis nigrita (8.85 ~c 0.27%). For crude protein there was different (p 〈 0.05) same with fat content, ash content, and carbohydrate content (p〈 0.05) unlike moisture content and dry matter content which is (28.57 ~c 1.55%), (32.50 ~c 4.08%) and (32.67 ~c 1.99%) in Chrysichthys nigrodigitatus, Mormyrus rume and Synodotis nigrita. Result showed total bacteria count from (1.9 to 3.8 x 10〈sup〉6〈/sup〉 cfu/ml) from Chrysichthys nigrodigitatus while (2.8 to 4.7 x 10〈sup〉6〈/sup〉 ur cfu/ml) was obtained for Synodontis nigrita and (2.6 to 3.8 X 10〈sup〉6〈/sup〉cfu/ml) for Mormyrus rume. The micro-organism isolated were pseudomonas spp; Escherichia spp; Klebsiella spp; omomls spp, Escherichia spp., Klebsiella spp., Staphylococcus spp., Proteeus spp. and Micrococcus spp. On biochemical characterization the following bacteria was isolated Pseudomonas spp., Escherichia spp., Klebsiella, spp. staphylococcus spp., Proteus Micrococcus spp.
    Description: Includes: 44 references.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Mormyrus rume ; Synodontis nigrita ; Nigeria ; Haematology ; Sex-reversal ; Growth paramwters ; Nutrient utilizatio ; S. melanotheron ; freshwater environment ; automation
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  • 161
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    Preliminary studies on some physico-chemical parameters and fish species composition of Doma Dam, Nasarawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24638 | 19325 | 2018-05-24 09:36:38 | 24638 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study of some Physico-chemical parameters and fish species composition of Doma Darn was carried out between the month of August 2012. Fishing communities along the dam were selected at sampling stations and collection of fish species. The values of physico-parameters obtained for stations were in the range of 28.10-92 m for depth, 27.70-28.48~'for temperature, 7.03-7.64 for PH, 7.23-7.64mg/l for dissolved oxygen (DO), 30.08-31.75 ntu for turbidity, 94.64-105.17mg/l for alkalinity and 79.17-80.58mg/l for total hardness. The result indicated that there was significant difference (p〈0.5)for depth, temperature turbidity and alkalinity, while there was no significant difference (p〈0.05) for DO, pH and water hardness among the stations. The result of these parameters among the duration shows that there was significant different (p〈0.05) in all the parameters except pH. The study revealed that there were twenty-five (25) fish species belonging to 12 families in the dam. The family Cichlidae and Mochokidae and Bagridae which has three each, While the family, Polypteridae, Channidae, Centropomidae, flepsetidae and Protopteridae has the lowest number of one (1) each. The overall result revealed that the Phvsico-chemical parameters were mostly influenced by duration and not much by stations; and parametersoaram measured were within the recommended water quality requirement for growth and survival of aquatic organisms.
    Description: Includes: 10 references.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Doma Dam ; Doma Dam ; Fishing community ; Physico-chemical parameter ; Fish species ; freshwater environment ; automation
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    Climate change and the challenges of fisheries resources management in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24642 | 19325 | 2018-05-24 09:44:51 | 24642 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper takes a practical look at the challenges faced by fisheries resources in Nigeria due to climate change. It shows that Chad which produce 60% of smoked fish in Nigeria worth N2.6 billion is at the brink of extinction and is expected to dry to a mere 2000 sq km by year 2010 from over 25,000sq km in the 1960s. In simple clear terms, the paper gives practical adaptation and policy to face the challenges of climate change.
    Description: Includes: 11 references.
    Keywords: Environment ; Fisheries ; Nigeria ; freshwater environment ; automation
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    Format: 306-309
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  • 163
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    Communication strategies / matrix for stakeholders' adaptation to climate change issues in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24664 | 19325 | 2018-05-27 15:01:44 | 24664 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Over the years, man has exploited the ocean and its resources for sustainable livelihood. Man's indigenous and traditional knowledge has been the mainstay and guidance in exploiting the ocean and coastal resources. However, as industrialization and other climate conditions set in to alter or modify the productivity of the ecosystem, there has been a lot of concern by international, regional and local authorities to continuously study the prevalence of these factors and triggers off these climatic changes and their impacts on livelihood of fisherfolks at the industrial or artisanal level of fishing and other fisheries activities like fish farming and fish processing. A quantum of technical and scientific information on the ocean and interactions with other elements have been archived in various libraries, information centers and on the internet. These channels provide information for only those who can access them for policy formulation but cannot actually reach those who will benefit or implement the issues discussed in the policy documents for their livelihood. Meteorological data are reported in technical terms. Figures and other illustrations cannot be utilized by the average artisanal and industrial fishermen for the rational exploitation of the ocean resources. The woman fish processor who uses solar dryer may not be able to relate the weather condition and why her fish cannot dry at the normal time. There are times natural phenomenon like change in the direction of or its intensity can be interpreted by a fisherman as the handwork of his enemy to thwart his fishing effort for that day. Oceans sourge causes and its possible displacement of coastal dwellers might not be fully comprehended by those living in coastal communities. There is the need therefore to develope a communication and outreach strategies using a simple communication matrix for easy articulation of approaches to communicating with all potential and identified stakeholders in Climate change and its effects on stakeholders. This paper therefore discusses some of the climatic conditions and factors that affects the ocean, coastal areas and their productivity. It particularly focuses on communication strategies of information, educating and entertaining in reaching out to identified stakeholders on climate impacts for its rational exploitation and improved income for better standard of living. It finally produced a simple applicable communication matrix for reaching out to all stakeholders in Climale change and its impacts.
    Description: Includes: 10 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; freshwater environment ; automation
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    Preliminary study on the antioxidative and anti-fungal effects of ginger oil on the shelf life of hot smoked fish (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24670 | 19325 | 2018-05-23 07:45:45 | 24670 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The anti-oxidative and anti-fungal effects of ginger oil on smoked Chrysichthys nigrodigitatus, Clarias gariepinus and Oreochromis niloticus was examined during five week storage at room temperature (25-30)~'C. The ginger oil was extracted from fresh ginger through hydro-distillation. The fish samples were gutted washed thoroughly and each fish species was divided into three groups. Two groups were spiced with 1.0ml and 1.5ml of ginger oil/kg of fish respectively before they were smoke dried for 2 hours. The third group acts as the control which was not spiced with ginger oil. Chemical and microbiological analyses were performed to investigate quality changes, and to determine the shelf stability of the products. The lowest TBA (14.64 mg MDA/kg), and Peroxide (3.91 mEq/kg) values were recorded in 0. niloticus samples treated with 1.5ml ginger oil/kg of fish at week 1, while the highest TBA (30.48 mg MDA/kg), and PV (18.76 mEq/kg) occurred in the C. gariepinus control at week 5. The result also revealed that samples treated with ginger oil had lower mould count than the control, but there was no significant different (P~.0.05), when compared to the control after 5 weeks of storage.
    Description: Includes: 21 references.
    Keywords: Fisheries ; Nigeria ; Catfish ; Ginger ; Peroxide ; Quality ; Smoked ; Storage ; Thiobarbituric acid ; freshwater environment ; automation
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  • 165
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    Fin fish assemblage of the main channel of the lower Benue River, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23220 | 19325 | 2018-03-18 13:43:43 | 23220 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish species assemblage in the lower Benue River was assessed by collecting samples in 5 established sample stations within Benue state. Some physical and chemical parameters were also assessed. The mean values of the parameters recorded include; Temperature 24~?C, pH = 7.09, Alkalinity (Cac03) = (37 mg/l) Amonia (NH3) = (37.9 mg/I), C02= (9.5mg/I), Chloride (Nacl) = (12.8mg/I), Total hardness = (11mg/I), Dissolved oxygen (Do) = (11 mg/I), and Turbidity = (45cm). Forty eight (48) fish species belonging to 32 genera in 18 families were recorded. It was observed that the family Bagridae had the highest number of species (7, 15%) Mormyridae, Characidae and Mochokidae followed with 5 species (10.63%) each. Cyprinidae, Clariidae and Cichlidae had 8.51% with 4 species each. Citharinidae formed 6.38% with 3 species, while schilbeidae formed 4.25% (2 species). All other families had only one species recorded in it (2. 12%). Bagridae and clariidae dominated in station 1, while the family Mochokidae showed dominance in station 5. Family Ariidae, Gymnarchidae and Centropomidae were rare in the lower Benue River. There were no significant differences in the abundance of the fish species caught in the different stations. Among the stations also, the l1umber of fish caught during the seasons did not differ (p〈0. 05). These physical and chemical factors did not significantly affect occurrence and even distribution offish in the study.
    Description: Includes:-4 tables.;10 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Lower Benue R. ; freshwater environment ; Population dynamics ; Check lists ; Species diversity ; Finfish fisheries
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  • 166
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    Comparison of fried and baked fish Oreochromis niloticus cakes (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23219 | 19325 | 2018-03-18 13:41:52 | 23219 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Oreochromis niloticus fish-in-cake were made to improve its food value as well as create new menu. Fried fish-in-cake was 66.2% appealing in its colour, taste, texture and odour to assessors than the 64% rating for baked fish-in-cake.
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Fisheries ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Fishery products ; Processed fishery products ; Fish utilization
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  • 167
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    Fermentation of Synodontis membranaceus using different percentage of ginger (Zingiber officinale) (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23223 | 19325 | 2018-03-18 13:54:52 | 23223 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Synodontis membranaceus was subjected to fermentation for a period of one month with varying concentration of ginger (5%, 10%, 15%, 20%) and 20% salt as spices to produce a paste. It was buried underground at 34 +-3~?C and analyzed for proximate composition, pH, microbial load, and organoleptic properties at the beginning and end of the fermentation. Results show steady increase in nutrients such as crude fat, ash, and NFE (nitrogen free extract) but decrease in crude fiber. There were fluctuations in the crude protein of the fermented samples, an evidence of fermentation. There was an increase in the microbial load of the different treatments and a slight decrease in the moisture content. The organoleptic analysis also showed preference for taste, aroma, and overall acceptability for 20% ginger and a significant difference (p〈 0.05) was observed in the taste scores for salt only and 20% ginger.
    Description: Includes:- 5 tables.;31 refs.
    Keywords: Fisheries ; Synodontis membranaceus ; Nigeria ; freshwater environment ; Fermentation ; Fermented products
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  • 168
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    The marketing and distribution of fish in New Bussa fish market area of Niger State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23237 | 19325 | 2018-03-18 15:16:31 | 23237 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish marketing and distribution in New-Bussa market was studied weekly for three months (August -October, 2005). The result showed that the major fish species common in New-Bussa fish market are Clarias,Citharinus,Mormyrus,Bagrus,Alestes, Synondontis,Lates, Chrysicthyes, Tilapia, Hydrocynus and Clarotes. The business of catching, marketing and distribution of fish is controlled by young men and women of the age bracket of 14-40 years old. Over 15 different ethnic groups from 14 states in Nigeria and Ghana, Chad, Benin Republic, Mali are involved in fish marketing and distribution business in New-Bussa. The indigenous ethnic groups are Gungawa, Busawa, Kambari, and Nupe, they formed 65% of the ethnic groups found in New-Bussa. The remaining ethnic groups are migrants. Women dominated the trading and processing of fish.
    Description: Includes:- 4 tables.;7 figs.;5 refs
    Keywords: Fisheries ; Management ; Nigeria ; New Bussa ; freshwater environment ; Marketing ; Market research ; Fish
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  • 169
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    Assessment of fishery content in agricultural activities of the rural women in Kukawa Local Government Area (LGA) of Borno State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23235 | 19325 | 2018-03-18 15:11:53 | 23235 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Content of fishery in agricultural activities of rural women was carried out in Kukawa L.G.A of Borno State. A total of 96 respondents were randomly interviewed with the aid of structured questionnaire and data presented with descriptive statistical tools. In addition to reproductive role in marriage, women are actively involve in agriculture for economic benefit, but weak socio-economic variables need to be strengthen for improve productivity and economic benefit. Fishery (10%) has a low content in the agricultural activities of rural women which is dominated by crop farming and agricultural processing. Poor annual financial return of N19, 585.33 on average as reward for long period of 8 hours on average put in agriculture is discouraging. Diversification into fish marketing and process provides avenues for viable daily income to the women in the area. Identified constraints are extension delivery, financial poverty, farm land, technological input and infrastructure. Opportunities to empower rural agricultural women include social capital formation, co-operative group, access to fertile farm land, pro-active extension information dissemination as well as participation in government programmes like on-going fadama and agricultural credit schemes.
    Description: Includes:- 3 tables.;14 refs.
    Keywords: Agriculture ; Fisheries ; Sociology ; Nigeria ; Kukawa ; freshwater environment ; Women ; Socioeconomic aspects
    Repository Name: AquaDocs
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  • 170
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    The role of microfinance in wealth creation among the artisanal fisherfolks in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23245 | 19325 | 2018-03-25 12:41:19 | 23245 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: One of the greatest challenges in Nigerian rural development process particularly in the fishing communities, which are often isolated and vulnerable, is to address the constraints that exclude people from full participation in the management of their financial resources. Majority of fishers dwell along the margins of Lakes, Rivers and Creeks and mostly operate without dependable financial resources, business loans or a safe place to keep their savings. This, to a greater extent, inhibits their growth and expansion to the realization of formalized entrepreneur's status that constitutes a set-back to the sector and the National economy at large. However the recent economic transformations in the country pursue microfinance not only as a poverty alleviation tool but also as a sound and viable business. This paper reviewed the concept of microfinance, its implementation, roles, constraints etc. to serve as a guide for adoption and utilization amongst the artisanal fisher folks with the view to increasing their general well-being on a sustainable basis.
    Description: Includes:- 1 fig.;8 refs.
    Keywords: Fisheries ; Management ; Nigeria ; freshwater environment ; Artisanal fishing ; Financial institutions ; Financial resources ; Financing ; Financial management ; Fishery economics
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  • 171
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    Effects of soaking on artisanal polyvinyl-alcohol (PVA) synthetic fishing twine in freshwater, brackish and marine waters (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24183 | 19325 | 2018-05-16 14:35:10 | 24183 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Elongation (cm) and breaking-load (kgf) effects on artisanal Polyvinyl-Alcohol (PVA) synthetic twine of diameters 4mm, 6mm, 8mm and I0mm soaked in fresh (0.4ppt), brackish (25ppt) and marine (37ppt) waters for 112 days were investigated. Chemical (burning) test was carried out to identify the experimental white twine as PVA, among other six locally synthetic twines (Klust, 1973). A tensile-strength gauge machine (0-200kg) was used to test the mechanical strength properties of PVA twine diameters in dry (control) and wet states. Results indicated that elongation and breaking-load of the specimens were significantly (P〈0.05) influenced by R- Tex. Elongation and breaking-load were observed to be highest in dry twine 10mm with means of 20.75a ~c 1.05 and 140.00a ~c 5.37 respectively, higher in twine 10mm (with means of 20.40b ~c 3.50 and 131.75b ~c 5.l0 respectively) soaked in freshwater and lowest in twine 4mm (means of 1 4.83fg ~c 0.31 and 33.70h ~c 1.00 respectively) soaked in marine water. Twines of the same diameter (l0mm, 8mm, 6mm & 4mm) soaked in fresh water (0.7ppt) has highest significant (p〈0.05) elongation and breaking load than those soaked in brackish (0.25ppt) and marine water respectively. The thicker the PVA twine diameter, the higher the significant (p〈0.05) elongation and breaking load, which could lead to increased mesh sizes of fishing nets constructed from such twines. Fishermen are therefore encouraged to air-dry their fishing nets or gears when not in used to extend the shelf-life.
    Description: Includes: 4 tables.;Also includes: 18 references.
    Keywords: Fisheries ; Nigeria ; Ogun state ; Artisanal fishing ; PVA synthetic twine ; Freshwater ; Brackishwater ; Marine water ; brackishwater environment ; freshwater environment ; marine environment ; Yarns ; Synthetic fibres ; Artisanal fishing ; Fishermen ; Fishing nets ; Fishing gear ; Comparative studies ; Air exposure ; Netting materials ; Gear research ; Tensile strength ; Materials testing ; Saline water ; Fresh water ; Brackish water
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  • 172
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    Prospect of retort pouch food technology in the Nigerian fishery industry: an overview (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24187 | 19325 | 2018-05-16 14:56:16 | 24187 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Retort pouch as a packaging material for varieties of food items such as fish, vegetables, fruits and food crops was highlighted. Materials required for the processing of pouches were listed and the methodology of production discussed. The paper provided insight for investors to invest in the technology of pouching as a means of engaging unemployed youths in Nigeria.
    Description: Includes: 3 figures.;Also includes: 6 references.
    Keywords: Fisheries ; Nigeria ; Niger ; Resort pouch ; Packaging ; Processing ; Raw materials ; freshwater environment ; Product development ; New products ; Fishery industry ; Packing fishery products ; Raw materials ; Food technology ; Food ; Fish ; Evaluation ; Testing ; Livelihoods ; Economic benefits ; Packing materials
    Repository Name: AquaDocs
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    Awareness on the use of solar tent dryer among the fish processors of Kukawa Local Government, Borno State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24194 | 19325 | 2018-05-16 15:09:49 | 24194 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was carried out in order to assess the use of solar tent dryer in some selected fishing settlement (Yobe, Daban Masara, Tumbun Beriberi and fish Dam) in Kukawa Local Government. Secondary and Primary data were used in this research. Secondary data were obtained from various literatues while primary data were obtained through the use of structured questionnaires. A total number of 60 respondents were randomly selected and interviewed: Fifteen from each settlement (fish processors). Simple percentages were used in analyzing the data. Findings revealed that, majority of the respondents (fish processors) 80% were not aware of the existence of solar tent dryer that can be used for drying fish, only 20% were aware of solar tent dryer.Among these respondents who are aware of solar tent dryer, only 3.33% have used it. The general perceptions of the respondents believe that they will use it if they are provided with the solar tent dryer. The level of awareness on the use of solar tent dryer for fish processing is very low, there is need for intensive awareness creation, through fishery extension workers.
    Description: Includes: 5 tables.;Also includes: 6 references.
    Keywords: Fisheries ; Nigeria ; Kukawa ; Solar Tent Dryer ; freshwater environment ; Fishery products ; Processing fishery products ; Drying ; Cured products ; Aquaculture equipment ; Artisanal fishing ; Solar power
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  • 174
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    Status survey of artisanal fisheries in Hadejia Emirate, Jigawa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24181 | 19325 | 2018-05-16 14:32:52 | 24181 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted to investigate the status of artisanal fishery in Hadejia emirate of Jigawa state, Nigeria using a total of 192 well structured questionnaires in eight local government areas. The questionnaire captured information on biodata of respondents, water bodies and their uses, types of fish caught, level of catch and fishing gears used. The results obtained showed that fishing was mostly practices by male (79.69%), within the age of 25-35 years (33.86%) and married (61.46%) and most of them were found to be at tertiary institution of learning (55.73%). The study also revealed that majority used rivers as water source (52.08%) while only (31.25%) used the rivers for fishing and majority of their catch were Tilapia and Clarias (72.92%) with (52.60%) catching a large number above 30 per day. During catching 65 (33.85%) used Gill net, 52 (27.08%) used Cast net, 45 (23.44%) used Hook and line, while only 30 (15.63%) used Seine net.
    Description: Includes: 3 tables.;Also includes: 11 references.
    Keywords: Fisheries ; Nigeria ; Hadeja ; Surveys ; Artisanal fisheries ; Hadeja Emirate ; Jigawa state ; freshwater environment ; Artisanal fishing ; Lake fisheries ; Water bodies ; Catch composition ; Catch/effort ; Fishing gear ; Rivers ; Cast nets ; Hooks ; Lines ; Seine nets ; Fishery surveys ; Sociological aspects ; Catching methods
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  • 175
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    Comparative study of monofilament and multifilament gillnets in Lake Kainji (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24179 | 19325 | 2018-05-13 19:05:16 | 24179 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Comparative studies of monofilament and multifilament gillnets in Lake Kainji was carried out at Monai fishing village of Lake Kainji. A total number of six nets (3 multifilament and 3 monofilament gillnets) each measuring l5 meters in length and 3 meter depth were constructed; Kuralon ropes were used as footrope and headrope, synthetic corks as float and lead as weight. The net were set in the evening (between 5:00pm and 6:00pm) and hauled in the morning (between 8am and 9am) thereby maintaining a soaked time of about l5 hours.The species captured were: Oreochromis niloticus, Oreochromis aureus, Sarotherodon galileus, Tilapia mariae, Synodontis nigaita, Alestes baromoze, Distichodus rostratus, Tilapia dageti. The result obtained from the fish caught shows that Monofilament gill net had a better performance than Multifilament gill net; this was attributed to the looseness and flexibility as well as the transparent nature of the net which makes it invisible in water. However, from the statistical analysis (variance test) carried out, there was no significant (P〉0.05) difference in numbers and weight of fish species caught by the two nets.
    Description: Includes: 3 tables.;Also includes: 5 references.
    Keywords: Fisheries ; Lates niloticus ; Oreochromis niloticus ; Oreochromis aureus ; Tilapia mariae ; Tilapia dageti ; Nigeria ; Kainji L. ; Monofilament ; Multifilament ; freshwater environment ; Gillnets ; Construction ; Catch composition ; Flexibility ; Transparency ; Mesh selectivity ; Visibility ; Netting materials ; Artisanal fishing ; Lake fisheries ; Comparative studies ; Gear research ; Gear selectivity
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    Assemblages of fish species of Ikpa River in Akwa Ibom State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24182 | 19325 | 2018-05-13 19:11:34 | 24182 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species were investigated for 12 calendar months from March 2009 - February 2010 forthnightly using traps, gillnets and cast nets from three sampling stations in Ikpa River. Ornamental fish species were sorted out from the pooled samples. The findings revealed that out of the 2307 fish specimens sampled, 1074 specimens made up of 38 species and 19 families were of indigenous ornamental fish. The highest contributing family in terms of number of species is Cichlidae (10 species) whereas Schilbeidae (593 specimens; 55.21%) is the highest contributor in terms of total number of specimens sampled. This is followed by Mochokidae and Mormyridae with 4 species each and Cichlidae with 158 specimens (14.70%). At the species level, the highest contributor is Physalia pellueida (577 specimens;53.72%)and is followed by Erpetoichthys calabarcus (60 specimens; 5.59%). The least contributors were Heterobranchus bidorsalis, periophthalmus barbarus and Pelyicachromis pulcher (1 specimen; 0.09%). Twelve families recorded only one species each. These great potentials of ornamental fish have been left unexploited and hence, undeveloped. Several species of ornamental fish have been imported into and exported from Nigeria by businessmen. This paper therefore highlights the constraints and also make recommendations for the exploitation and development of ornamental fishery in Akwa Ibom State and its environs.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Fisheries ; Nigeria ; Ikpa R. ; Exotic ; Ornamental ; Indigenous ; Fish species ; Ikpa River ; freshwater environment ; Lake fisheries ; Ecological associations ; Artisanal fishing ; Taxonomy ; Ornamental fish ; Exploitation ; Fish ; Stock assessment ; Potential resources ; Fishery development ; Fishery surveys ; Freshwater fish ; Check lists
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    Bacteriological assessment of smoked fish (Clarias Sp.) around Shiroro Lake area of Niger State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24185 | 19325 | 2018-05-16 14:41:02 | 24185 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Bacteria has been implicated in food poisoning, and smoked fish is not an exception.Generally, fish is highly susceptible to spoilage; therefore this study evaluated the bacteria load in smoked fish from three major locations in Shiroro area of Niger State namely; Gwada, Kuta and Zumba.The smoked fish samples collected from these locations were smeared at both the gills and head regions of the fishes. The bacteria samples identified were Escherichia coli, Bacillus subtilis, Staphylococcus aureus, Staphylococcus epidermis, Pseudomonas aeruginosa, and Samonella typhi, which were common to all the three locations sampled, while only Streptococcus feacaliswas only was found to be present in both Kuta and Zumba location.The frequency of occurrence of these 68 bacteria samples isolated ranges from 8 - 20%, with Bacillius subtilis having the highest occurrence and Pseudomonas aeruginosa have the least occurrence. Out of the total 68 samples, 14 skin samples (20.6%) and 5 gills samples (7.4%) exceeded the acceptable limits of total mesophilic aerobic counts which were 10〈sup〉6〈/sup〉 - 10〈sup〉7〈/sup〉 cfu/g. In the case of total coliform counts, 12 skin samples (17.6%) and 7 gills samples (10.3%) exceeded the acceptable limit which is 4.0 x 102, while in the case of Staphylococcus aureus, 4 skin samples (5.9%) and 2 gills samples (2.9%) exceeded the acceptable limit which is 103 cfu/g. Similarly 3 skin samples (4.4%) and 1 gill sample (1.5%) exceeded the acceptable limit of Salmonella typhi which is 104 cfu/g.
    Description: Includes: 4 tables.;Also includes: 21 references.
    Keywords: Fisheries ; Health ; Escherichia coli ; Bacillus subtilis ; Staphylococcus aureus ; Staphylococcus epidermis ; Pseeudomonas aeruginosa ; Nigeria ; Shiroro L. ; Bacteria ; Smoked (Clarias spp) fish ; Location and recommended values ; brackishwater environment ; freshwater environment ; marine environment ; Bacteria ; Food poisoning ; Cured products ; Fish ; Fish spoilage ; Acceptability ; Lake fisheries ; Gills ; Brain ; Evaluation
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    A survey of the fisheries of River Niger at Yauri, Kebbi State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24188 | 19325 | 2018-05-16 14:57:51 | 24188 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A survey of the fisheries of river Niger at Yauri was conducted with the aid of questionnaires administered randomly at four (4) landing sites of Tashan Kasuwa (main market), Gidan-ruwa, Yabon-ruwa and Hutawa. A total of fifty (50) questionnaires were administered in all the villages. From the research work it was found that 76 % of the fishermen operate on full time basis while 24 % operate on part time basis. Out of the 50 fishermen interviewed only 46% were licensed to operate there. The type of fishing gears and equipments used in Yauri are hook and line, cast net, gill net and seine net. About 46 % of the fishermen were found using mesh size less than 2.0 cm. The dominant fish species caught during flood and dry seasons include Clarias spp., Lates niloticus respectively. Higher catches are made in the months of March and April. All the fishermen interviewed (100%) do not process their fish but disposed them off fresh. Sixty percent of the fishermen belong to different cooperative societies, while 40% do not belong to any cooperative society. The problem associated with fishing operation at Yauri includes that of lack of credit facilities, lack of extension agents, and high cost of fishing items, poor road network and remote location of the fishing village.
    Description: Includes: 5 tables.;Also includes: 8 references
    Keywords: Fisheries ; Nigeria ; Yauri ; Niger River ; Fisheries ; Fishing operations ; River Niger ; yauri ; freshwater environment ; Fishery surveys ; Fishermen ; Artisanal fishing ; Seine nets ; Fishing gear ; Fishing ; Equipment ; Fish ; Catch statistics ; Cooperatives ; Financial management ; Extension activities ; Fishing villages ; Locations (working) ; Seasonal variations ; River fisheries
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  • 179
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    Heavy metal content of sole, Solea solea and croaker, Pseudotolithus typus from Lagos and Delta State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24227 | 19325 | 2018-05-19 07:16:39 | 24227 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigated the levels of lead (Pb), cadmium (Cd), Copper (Cu), Chromium (Cr) and Zinc (Zn) in two common edible fish species, Sole, Solea solea and Croaker, Pseudotolithus typus from Makoko and Koko in Lagos and Delta states respectively. Heavy metal contents were determined by air-acetylene flame Atomic Absorption Spectrophotometer after wet digestion of dried and milled samples with 1:1 HN0〈sub〉3〈/sub〉: H〈sub〉2〈/sub〉O〈sub〉2〈/sub〉. Results obtained (~kg/g, dry weight) for Sole in Lagos and Delta states were: Pb (0.330 and 0.149), Cd (0.097 and 0.063), Cu (0.869 and 0.434), Cr (1.184 and 0.826), Zn (7.612 and 7.890); and Croaker: Pb (0.163 and 0.045), Cd (0.115 and 0.029), Cu (0.990 and 0.694), Cr (1.008 and 1.038) and Zn (6.756 and 6.168) for the wet season (April-October); and Pb (0.534 and 0.527), Cd (0.373 and 0.410), Cu (0.437 and 0.556), Cr (0.834 and 0.983), Zn (6.764 and 9.343) for sole and Pb (0.210 and 0.213), Cd (0.264 and 0.307), Cu (0.442 and 0.483), Cr (0.577 and 0.597) and Zn (4.783 and 5.924) for croaker in the wet season (July-October). Significant (P~B 0.05) variations were observed in metal content between fish in terms of species, location and season. Generally, sole had higher metal concentrations than croaker; and metal contents were higher in samples from Lagos compared to Delta, probably due to the contribution of more effluents from industrial, commercial and municipal wastes in Lagos state. Cd and Cr levels in the test species were found to exceed international standards. It is recommended that a programme of continuous monitoring and control of the physical and chemical characteristics of components and food products of Nigeria's coastal zone be incorporated as a management tool for this important ecological zone.
    Description: Includes: 20 references.
    Keywords: Fisheries ; Pollution ; Solea solea ; Pseudotolithus typus ; ASE ; Nigeria ; Lagos Lagoon ; ASE ; Nigeria ; Delta ; freshwater environment ; Heavy metals ; Comparative studies ; Seasonal variations ; Flatfish fisheries ; Effluents ; Pollutants ; Environmental monitoring ; Pollution control ; Pollution effects ; Pollution monitoring ; Freshwater fish ; Industrial wastes ; Freshwater pollution ; Lead ; Cadmium ; Copper ; Chromium ; Zinc ; Bioaccumulation ; Food fish
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    Acute toxicity of industrial effluents from Agbara environs of Ologe Lagoon on early life stages of African catfish Clarias gariepinus (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24217 | 19325 | 2018-05-19 06:56:50 | 24217 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The acute toxic effect of industrial effluents from Agbara Industrial environs of Ologe lagoon was investigated in a static renewable lethal bioassay using fingerlings and Juveniles of African catfish (Clarias gariepinus). Twenty (20) pieces of the fingerlings were stocked per tank and each treatment was in triplicate. Physico-chemical parameters: temperature, pH, Dissolved Oxygen, DO and conductivity in treatment tanks were monitored for 96 hours. Behavioural responses were studied; mortality data recorded, and histopathological analysis was also done. Except for dissolved oxygen, other physico-chemical parameters monitored did not show significant differences (p〉0.05). The lethal bioassay showed that as the concentration of effluent increased, more mortality was recorded; but as the time of exposure increased, mortality reduced. The LC50 obtained at all the different time intervals for C. gariepinus fingerlings in 24,48, 72 and 96 hrs were: 69.45,46.39, 40.81 and 34.03(%). While in juveniles, the values were: 64.52,49.21, 32.50, and 19.63(%) respectively. Abnormal behaviour was observed; they showed repeated darting movement within an hour of introduction, darkening in the eye and on the skin, haemorrhage in the gills, spiral swimming and death. Histopathological examination of the gills and liver of the fishes showed lesions which increased progressively with increasing level of toxicants. Observed changes in the gills were mainly: epithelial lifting, swollen lamellae, necrosis and mass degeneration, fatty and vacuolar degeneration, loss of lamellae and marked disorganization in gill structure and arrangement. In the liver, there were vacoulation, portal congestions, pancreatic necrosis, fatty degeneration and severe disruption of the hepatic cord. Fishes in the control treatments showed no visible lesions throughout the experiments. This information confirms that histopathological alterations are good biomarkers for toxic impact assessment of industrial effluent on fish. Therefore, an indiscriminate discharge of this effluent to surrounding water should be discouraged.
    Description: Includes: 33 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Ologe Lagoon ; Acute ; Toxicity ; Industrial effluence ; Ologe lagoon ; brackishwater environment ; Toxicity ; Industrial wastes ; Lagoons ; Brackishwater fish ; Juveniles ; Fingerlings ; Physicochemical properties ; Histopathology ; Pollution effects ; Mortality ; Brackishwater pollution
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    Detection of Listeria monocytogenes in frozen fish in Lagos, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24229 | 19325 | 2018-05-19 07:20:47 | 24229 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The objective of this study was to detect Listeria monocytogenes in frozen fish in Lagos, Nigeria. A total of 55 frozen fish from two markets (Iyana-Ipaja and Mushin) were analyzed for the presence of L. monocytogenes using Oxoid Listeria Precis method. Out of the 55 samples analyzed, only 15 were positive for L. monocytogenes. The study showed that L. monocytogenes is a contaminant of frozen fish and may pose serious health implications on consumption of the contaminated fish.
    Description: Includes: 20 references.
    Keywords: Fisheries ; Health ; Listeria monocytogenes ; Nigeria ; Lagos ; Listeria monocytogenes ; Frozen fish ; Oxoid Listeria Precis ; freshwater environment ; Frozen products ; Fish ; Public health ; Bacteria ; Samples ; Fishery products ; Microbial contamination ; Quality assurance
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    Comparative study of bacterial isolates associated with the skin of catfish (Clarias anguillaris and Heterobranchus bidorsalis) in Kainji Lake area (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24596 | 19325 | 2018-05-20 16:13:09 | 24596 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Sixty apparently healthy Heterobranchus bidorsalis and Clarias anguillaris from NIFFR were cultured and 30 each from Monai and wara villages as wild environments were obtained for the studies. The total bacterial load varied from 2.2 x l05 to 1.08 x l08 and 2.27 x 105 to 6.3 x l08 CFU/g of the skin of C. anguillaris and H.bidorsalis in the culture respectively, while the load varied from 1.77 x 105 to 1.17 x l08 and 2.27 x 105 to 9.0 x l07 CFU/g in the wild respectively. Eleven bacterial general species were identified which include: Bacillus species B.firmus, Pseudomonas species, P. aeruginosa, Escherichia coli, Klebsiella aerogenes, K. ozaenae, Staphylococcus aureus, Streptococcus species, S.faecalis, and Aeromonas species. The aims of this investigation is to compare the type and the load of bacteria isolates on the skin of catfish in both culture and wild environment.
    Description: Includes: 7 references.
    Keywords: Aquaculture ; Fisheries ; Clarias anguillaris ; Heterobranchus bidorsalis ; Nigeria ; Kainji L. ; Comparative study ; Bacteria ; Skin ; Clarias ; Heterobranchus ; Kainji Lake ; freshwater environment ; automation
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    Typha latifolia infestation and fish species migration in Hadejia Nguru wetland (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24604 | 19325 | 2018-05-21 12:23:19 | 24604 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The river was divided into two, within each sampling station. Open water and Typha latifolia infested area. The extent of coverage of Typha latifolia each year were determined using line transect. Experimental gill nets were used for the experiment in each location, and the data were collected every three months for the period of two years. The numbers of fish caught and their species in the three sampling sites were recorded. Seventy-four different species of fish were caught in the first year in open water while sixty one different species were caught in Typha latifolia infested area. In the second year seventy-four different species of fish were caught, while forty-five different species of fish were caught in Typha latifolia infested area. Typha latifolia proliferation affects all physio-chemical parameter in water.
    Description: Includes: 7 references〉
    Keywords: Ecology ; Fisheries ; Typha latifolia ; Nigeria ; Infestation ; Typha latifolia ; fish migration ; freshwater environment ; automation
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    Assessment of the bacteriological profile of water and fish samples from Hadejia reservoir in Jigawa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24609 | 19325 | 2018-05-22 05:56:26 | 24609 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Hadejia reservoir is a floodplain complex in north eastern Nigeria. This area has long been noted for its importance in fish production. It is also important to both year round native birds and European water birds that travel over the Sahara desert to this wetland to spend their winters. Quantitatiive and qualitative profile of bacteria in the reservoir was carried out. Quantitative analysis of bacteria in the water revealed that the water contained total heterotrophic count (THC) of 3.1 x 103 CFU/ml to 3.5 x 106 cfu/ml and total coliform count (TCC) ranging from 1.4 x 102 to 1.4 x 103 CFU/ml. Bacteria load in the fish intestines were 3.5 x 103 CFU/g and 3.1 x 104 CFU/g for total coliform and total heterotrophic count respectively. Fish gills had less count (2.1 x 102 CFU/g and 3.4 x 102 CFU/g for TCC and THC respectively), than the fish intestines. Bacteria species such as Aeromonas hydrophila, Vibrio cholera, Shigella species were isolated from the water samples. Escherichia coli, Salmonella sp. Shigella sp. were isolated from the fish samples.
    Description: Includes: 12 references.
    Keywords: Ecology ; Fisheries ; Aeromonas hydrophila ; Vibrio cholera ; Escherichia coli ; Nigeria ; Hadejia Reservoir ; Bacteriological profile ; Hadejia reservoir ; freshwater environment ; automation
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    Preliminary studies on the food and feeding habits of Synodontis membraneceus from Ogobiri River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24625 | 19325 | 2018-05-22 06:23:51 | 24625 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The food and feeding habits of Synodontis membraneceus of Ogobiri River of Bayelsa State, Nigeria was studied using 44 male and 51 specimens that were bought from fishers in the study area measuring between 5 and 25 cm total length. The Numerical and the frequency of Occurrence method of analysis were used. For the males, the food items by the numerical method were copepods (168), insects, (118), Cladocera (69), and unidentified items (32). In the female specimens, the food items were Cladocera (286), Insect (216), Copepod (100) and unidentified organisms/materials (65). In the Frequency of Occurrence method for the males, Copepod was still with a total of (48), Cladocera (44), Insects (29) and unidentified (16). For the females, Cladoera (48), Insects were (30) by Copepods (35) and unidentified (19). The Percentage composition of food items by the Numerical method was Cladocera (45.5%), Insects (34.5%), Copepod (12.5%), and unidentified items (7.0%) while the Percentage Frequency of Occurrence was, Cladocera, (30.5%), Insects (30.9%), Copepod (29.6%), and unidentified items (9.0%).
    Description: Includes: 21 references.
    Keywords: Ecology ; Fisheries ; Synodontis membraneceus ; Nigeria ; Ogobiri River ; Numerical methods ; Frequency of occurrence ; S.membranneceus ; Ogobiri River ; freshwater environment ; automation
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    Food and feeding habits of Auchenoglanis occidentalis from Lake Akata, Benue State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24628 | 19325 | 2018-05-22 06:28:42 | 24628 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Food and feeding habits of Auchenoglanis occidentalis were analyzed from samples collected between May 2008-April 2009, in Lake Akata. A total of 97 fish specimens were used for the study. The fish specimens used for the study were obtained from fishermen operating on Lake Akata. These fishermen use various fishing gears including hand nets, cast nets and gill nets of various standard mesh sizes (20.2, 25.4, and 30.5mm). Food and feeding habits were investigated using point and frequency of occurrence methods. The seasonal and monthly feeding index were also noted in the stomach contents of Auchenoglanis occidentalis over the period of investigation. The most important food items were Insects, insect larvae, Algae, and Fish scale. The result indicated that Auchenoglanis occidentalis is an omnivore but had a tendency to predate more on insects.
    Description: Includes: 22 references.
    Keywords: Ecology ; Fisheries ; Auchenoglanis occidentalis ; Nigeria ; Akata Lake ; Auchenoglanis occidentalis ; Food and feeding habits ; Lake Akata ; Nigeria ; freshwater environment ; automation
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    Fishing trials of metal drum trap in the Upper Nun River, Bayelsa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24636 | 19325 | 2018-05-23 08:00:42 | 24636 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A drum fishing trap was designed and constructed using normal metal drum material. The trap is easy to construct and has high capacity to catch fish. The fishing trap was selective of the specie Chrysichthys nigrodigitatus of the family Bagridae. Total cost of production was N5,000.00 which is affordable by an average artisanal fisher. The preliminary survey of fish composition of the trap January and June, 2013 revealed that a total of eight \{8) fish species belonging to 4 families were observed. The most abundant families were the Bagridae with three \{3) species which constituted 87.82% of the total sample collected, followed by the Mochokidae (7.61%) and Clariidae (3.55%) while the least percentage was Malapteruridae (1.02%).
    Description: Includes: 11 references.
    Keywords: Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Upper Nun River ; Drum fishing trap ; Production cost ; Catch composition ; freshwater environment ; automation
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    Catch composition of Malian trap (gura) in Lower Taylor Creek area, Bayelsa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24637 | 19325 | 2018-05-23 08:02:11 | 24637 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Catch composition of Gura Trap was studied in the Lower Taylor Creek, Bayelsa State, Nigeria. Twenty-seven traps with 1, 2 3 valves were exposed to 48 hours at a time, for 5 weeks between May and June 2012. A total of 11 species of fish belonging to 8 families were recorded in this study. The family Cichlidae had the highest number with 67.6% of the total catch. The result further showed that Tilapia guineensis was the most abundant species (41.9%) in terms of number, while Protopterus annectens was most abundant (67.16%) in weight. This study needs to be further expanded to cover all seasons, so as to know the traps and true species selectivity throughout the year.
    Description: Includes: 10 references.
    Keywords: Fisheries ; Protopterus annectens ; Nigeria ; Lower Tailor Creek ; Gura trap ; Specie selectivity ; Lower tailor Creek ; freshwater environment ; automation
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  • 189
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    A comparative study of the decomposition of Rhizophora racemosa and Nypa fruticans of the great Kwa River, Cross River State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24641 | 19325 | 2018-05-24 09:41:43 | 24641 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Mangroves are specialized marine ecosystem which is highly productive. They act as shelter, breeding and nursery grounds for a variety of Marine and brackishwater invertebrates and fishes. Some of the dominant plant species in mangrove vegetation of Nigerian coastline are Rhizophora species and Nypa fruticans. Studies were conducted on the decomposition of Rhizophora species and N. fruticans. The objective was to compare their decomposition rates and proffer informed management decisions. Decomposition rates of the two were monitored for 112 days using litter box experiment. Eight litter boxes were stocked with 10g of leaves of each species and two boxes containing the respective plants species were removed and examined for dry matter, carbon and nitrogen contents. There was no significant difference in the rates of decomposition of Rhizophora and N. fruticans leaves (p~.0.05) even though N. fruticans showed slightly higher rate of decomposition than Rhizophora. The linear relationship between the loss in dry matter and number were expressed as Y= 10.1-0.080x in N.fruticans, and Y=9.0-0.073x in Rhizophora sp. It was concluded that the argument in favour of the eradication of N.fruticans for the thriving of Rhizophora is inaccurate. Containment of the population rather than control is the logical strategy for the management of the riparian vegetation in the face of climate change.
    Description: Includes: 8 references.
    Keywords: Biology ; Fisheries ; Rhizophora racemosa ; Nypa frutican ; Nigeria ; Great Kwa River ; Decomposition rate ; Nipa palm ; Mangrove ; Ecosystem management ; marine environment ; automation
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    Climate change: mitigation and adaptation strategies in fisheries and aquaculture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24644 | 19325 | 2018-05-24 09:50:12 | 24644 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper examined possible mitigation and adaptation measures in small-scale fisheries, aquaculture and the fishing communities in Nigeria to cope with the impact of climate change. It is recognized that mitigation measures in fisheries are limited but must consider options on the inputs, equipments and methods employed in fishing and fish processing activities. Several opportunities for options in the country's artisanal fisheries and aquaculture, and by the fishing communities to reduce their vulnerability change impacts, and protect the livelihoods and food security have been identified. The areas of research on climate change to enhance knowledge on the socioeconomic , biolog1cal and ecological impacts, and to guide decision on mitigation and adaptation in fisheries and aquaculture and the fishing communities, are also outlined. Proper integration of fisheries and aquaculture into the national policy on climate change and the political will for implementation are key to effective climate change mitigation and to ensure sustainable fisheries, and protect the livelihoods and food security in the country.
    Description: Includes: 12 references.
    Keywords: Aquaculture ; Fisheries ; Pollution ; Nigeria ; freshwater environment ; automation
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    Fisheries resources and developmental potentials of Usuma River in Gwagwalada, Abuja (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24640 | 19325 | 2018-05-24 09:38:57 | 24640 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study on fisheries resources and developmental potentials of Usuma River in Gwagwalada, Ahuja was carried out between August and December, 2012 using standard methods and procedures. A total of sixteen (16) fish species belonging to nine (9) families were identified. The fish family Cichlidae was the most dominant by number representing 19.2% of the total catch. This was followed by the family Bagridae (17.5%) and family Cyprinidae (17.5%). There were more females than males which are an indication that with good monitoring, control and surveillance (MCS) the production potential of the river will be high.
    Description: Includes: 14 references.
    Keywords: Fisheries ; Nigeria ; Usuma River ; Fisheries resoirces ; Development potentials ; Fish species diversity ; Usuma River ; freshwater environment ; automation
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    The meeting point between fisheries science and traditional ecological knowledge in fisheries (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24643 | 19325 | 2018-05-24 09:47:33 | 24643 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Traditional Ecological Knowledge (TEK) is the sum of data and ideas acquired by a human group on its environment. Over the years, there has been a growing lack of confidence in centralized scientific fisheries management. Traditional ecological knowledge is recognized as a valuable tool for understanding trends of marine resources, ecosystem management and conservation. Some reseachers and policy-makers have called for TEK to play an increased role in fisheries management decisions. TEK helps to develop management practices which allow economic development without the over-exploitation of natural resources. However, the acceptance of TEK in fisheries management has been partly hindered by difficulties in translating local ecological knowledge into a form that can be applied dierectly to conventional top down approach of western fisheries management. For full integration of TEK and scientific knowledge in fisheries management, there must be constant communication, continuous education, mutual trust, collaborative validation of knowledge and respect for a workmg relationship to be sustained.
    Description: Includes: 17 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Fisheries management ; TEK ; Scientific knowledge ; Overexploitation ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 310-312
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    Evaluation of beach seine net by-catch in Lake Kainji, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24649 | 19325 | 2018-05-24 09:57:35 | 24649 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Studies on the evaluation of Beach Seine net by-catch in Lake Kainji was conducted in Yuna fishing village. The beach seine net of 306m long and 12m depth was used for this experimental fishing trial. The seining took about 2 hours and was done three times in three different sampling locations in the Lake. A total of 24 fish species were caught, two target species, P. afzeliusi and S. leonensis, and 22 fish species obtained from the by-catch. The overall total number of fish caught was 34,939 of which 96.9% was obtained from the target fish Clupeids while the remaining percentages 3.1% were the by-catch fish. The total weight obtained was 66.2kg, out of which the greatest proportion 50.7% was obtained from target fish and the rest percent 49.3% was recorded from the by-catch and discards fish. About 90% of the by-catch was undersized fish from the commercially important freshwater fishes of Lates, Citharinus, Labeo, Tilapias ctc. Recommendation was made on how to improve the use of this fishing gear in order to conserve and sustain the fisheries resources of Lake Kainji.
    Description: Includes: 11 references.
    Keywords: Fisheries ; Sierrathrissa leonensis ; Pellonula afzeliusi ; Nigeria ; Kainji L. ; Clupeid fishing ; Gear ; Target fish ; Discards ; Lake Kainji ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 331-334
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    Fisheries survey in Cross River State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24650 | 19325 | 2018-05-26 12:01:47 | 24650 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The survey was performed in the Calabar Municipality, Calabar South, Odukpani, Akpabio and New Bakassi Local Government Areas. Taken as indicator, number of canoes, the largest villages are situated in Akpabio and New Bakassi LGOs and the smallest in Calabar Municipality and Calabar South. The larger villages base economically apart from fishery on oil palm-dominated agriculture. There are villages where each man is a fisher and also a farmer and others, were these main professions are performed by different persons. In the larger villages, there are traditionally operating carpenters (boats builders), hunters, honey samplers and wood cutters. Nearly all women are engaged in fish trading and several as fish and shrimp processor (smoke-drying) and periwinkle sampler/processor. In the larger villages are three sizes of canoes, small for two, medium for seven and large for 10-15 crew members. The small canoes are mainly used for the gill net fishery system on juvenile bonga (ekpai) in the dry season and on croaker and other demersal and semi-demersal species mainly in the raining season and are common in all surveyed villages. They are also used for fisheries with trap, cast net and long line. With mediu sized canoes, it's mainly operated the anchor net for catch of estuarine shrimp and sometimes boat seine for adult bongo (ibat). The larger canoes are engaged in the purse seine fishery on ibat in the near-coastal waters. In most of the larger villages, it is a common expedition fisheries; fishermen leave for up to several weeks out of their homes and operate in the more productive outer estuary and near-coastal waters, mostly on an estuarine shrimp; they produce smoke-dried products in their camps. The mean catch per boat per day for the small about of 5kg, for the medium-sized 15kg and for the larger purse seine canoes more than 100kg. In Calabar Municipality and South LGAs, all catches are sold fresh in own small markets at the landing site. In other LGAs the catches are processing to smoke-dried product is common. However, by using the mostly existing road connections to Calabar, and also selling of fresh fish is performed. By estimation, the monthly mean income per fisher family in the larger villages is N30, 000, after paying for repairs of nets and outboard engine. On the daily income for fish processing and trading, women included N0-500 and the men, probably by N100 or less.
    Description: Includes: 6 references.
    Keywords: Fisheries ; Nigeria ; Cross River State ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 335-337
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  • 195
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    Survey of the present and fast disappearing fish species along two rivers in the Niger Delta (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24647 | 19325 | 2018-05-24 09:55:05 | 24647 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fisheries resources are on the decline in Nigeria due to over exploitation and inadequate management of her coastal waters. For sustainability of these resources, an adequate knowledge of species composition, diversity and relative abundance of her water bodies must be understood and vigorously pursued. A survey was conducted to determine fish species diversity in Brass and Nun River, Niger Delta, Nigeria and the socioeconomic studies carried out to determine the status of endanger or level of disappearance of fish species study area. The survey identified 53 species from 18 families caught from Brass and Nun stations respectively. The fish diversity from typically freshwater fishes such as Tilapia and Clarias to brackish species such as Chrysichthys nigrodigitatus and Penaeus species. The most abundant family within catch were the Scianidae, Cichlidae and Clariidae. A checklist of economically important fast disappearing fish species along the two water bodies was generated. Oil spillage, discharges from industries (industrialization) and the domestic wastes from boundaries settlements (urbanization) and farming activities along the tributaries were among the factors identified to have contributed to low species diversity and fast disappearance of certain species. Data generated from this study would serve as baseline information for fisheries resource management.
    Description: Includes: 11 references.
    Keywords: Fisheries ; Chrysichthys nigrodigitatus ; Tilapia guineensis ; Penaeus notialis ; Fistularia tabacaria ; Ethmalosa fimbriata ; Sphoeroides pachygaster ; Mobula coilloti ; Nigeria ; freshwater environment ; automation
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 322-323
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  • 196
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    Poverty and inequality among fishing households and implications for fishery resources management in Kainji Lake, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24662 | 19325 | 2018-05-27 14:58:51 | 24662 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fishing has traditionally been a major source of livelihood for fishing households in Kainji Lake Basin (KLB). It plays a significant role to the rural and national economy in terms of employment, income and source of protein. However, the livelihoods of the primary actors (fishers) are being jeopardized by the depletion of fishery resources, mainly due to over exploitation and poor management. This paper examines poverty among the fishing households in KLB using empirical data. Foster Greer Thorbecke (FGT) Model was adopted for the analysis. The results reveal greater poverty (over 60%) with minimal inequality among fishing households. Finally, the paper advances reasons based on the implications of the study for designing intervention strategies by policy makers and the like.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Sociology ; Nigeria ; Livelihood ; National economy ; Foster Greer Thorbecke model ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 385-387
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  • 197
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    The role of women in fishery activities in some coastal communities of Rivers State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24665 | 19325 | 2018-05-27 15:02:39 | 24665 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fisheries activities in 10 communities of Rivers State were investigated to determine the role of women in its development and sustainability. Two hundred structured questionnaires were randomly distributed in three communities (20 per community) across three Local Government Area of the State. The results from the study indicated that young and married women are actively involved in fisheries activities on part-time basis, when compared to the older ones. In the study area, women are mainly involved in the marketing of fishery products than processing or active fishing. Women are more involved in picking of shellfishes such as oyster, periwinkle at low tide than in creeks and rivers. Fish processing in these communities are done mostly by smoking, using a standing oven, which can dry a lot of fish at a time. The marketing strategies adopted by most women in selling their fishery products in the area are open market display and hawking, although, some sell their catch at landing jetties to buyers. Lack of credit facilities, poor transportation network and upsurge in criminal activities have been identified as major constraints facing women involvement in fishery activities in these areas. There is therefore, the need to empower the women fisher folks in these areas through granting of loans and credit facilities, capacity building, introduction of new technologies and improved transport network systems. These will go a long way in boosting fish production, improve their livelihood and enhance socio-economic status of the women fisherfolks in the coastal communities .
    Description: Includes: 23 references.
    Keywords: Fisheries ; Nigeria ; Rivers State ; Coastal area ; Women ; Fisheries ; Food ; Rivers State ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 397-401
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  • 198
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    Mesh size selectivity of multifilament gill net at Fakun village, north of Lake Jebba (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24645 | 19325 | 2018-05-24 09:51:45 | 24645 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Studies on the mesh size selectivity of multifilament gill net at Fakun village North of Lake Jebba were carried out. Four different sizes (76mm, 101mm, 126mm and 177mm) of multifilament nets were used in the construction of the gill net with hanging ratio 0.5 each. Daily catch from the nets were examined for seven weeks. The fish caught comprised of nine (9) species, belonging to six (6) families. The result of analysis of variance of the number of species caught showed significant difference (P〈0.05) among the different sizes of the gill net. The catch mean weight for each mesh size (76mm, 101mm, 126mm and 177mm), was 266.91, 285.54, 305.10 and 349.02 respectively. Also the relative percentage of number of species caught by each of the mesh size was 39.48% for 76mm, 23.58% for 101mm, 22.44% for 126mm and 14.48% for 177mm, which depicts the selectivity in the catch of the gill nets in this experiment.
    Description: Includes: 7 references
    Keywords: Fisheries ; Nigeria ; Jebba Lake ; Mesh size selectivity ; Gillnet ; Fakun village ; Lake Jebba ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 316-318
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  • 199
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    Assessment of fishing gear and crafts utilized by fishermen in Eleyele Lake, Ibadan, Oyo State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24646 | 19325 | 2018-05-24 09:53:29 | 24646 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to assess the evolution of fishing gears and crafts utilized by fishermen in Eleyele lake reservoir in lbadan Nigeria. Data were collected from thirty fishermen using a structured questionnaire. The data obtained were analyzed using counts and chi-square. Majority (56.7%) of the respondents were married, more of respondents were male (56.7%). Fish and fishing gear construction activities in the study area is dominated by youth. More of the respondents were Christians and few were Muslims (36.7%). There was significant relationship between the type of fishing gear use (modern and traditionl) and the time spent to catch fish as well as the quantity of fish caught. The result also revealed that traditional fishing gears such as bamboo trap, hook and line and cast net were been used by the fisher folks but were later changed to modern fishing gear. However, the effectiveness and efficiency of the modern fishing gear is being hampered by aquatic weed covering the surface of the water.
    Description: Includes: 15 references.
    Keywords: Fisheries ; Nigeria ; Eleyele Lake ; Evolution ; Fishing gear ; Fishing craft ; Fishermen ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 319-321
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  • 200
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    Effect of mesh size on catch performance of driftnets fishing in Lake Kainji (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24648 | 19325 | 2018-05-24 09:56:20 | 24648 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The studies on effect of mesh size on catch performance of driftnets fishing in Lake Kainji was experimented using 38.1mm, 63.5mm and 88.9mm stretched mesh size for 21 consecutive fishing days. The drifinets were operated by two fishing canoe; the operation was between 14.30 hours- 16.00 hours daily in the afternoon. Twenty-two fish species belonging to ten fish families were caught. The Species Diversity Index (SDI) revealed that 38.1mm stretched mesh size driftnet recorded the highest index of 0.77 next by 63.5mm mesh size with 0.45 and the least index of 0.36 was obtained in 88.9mm stretched mesh size driftnet. A total of 372 fishes were caught, 54.30% of this was caught by 38.1mm mesh size followed by 68.9mm mesh size (26.34%) and lowest (19.35%) was recorded by 63.5mm mesh size driftnet. The seven abundant fish species in the driftnets catches were S. galilaeus, D. rostratus, A. baremoze, S. membranaceus, T. zillii, L. senegalensis and H. fascialus. The total biomass of 25,314g (25.3kg) was obtained, 45.51% of this weight was captured 88.9mm mesh size while the least 24.24% was obtained in 63.5mm mesh size drifinet. S. galilaeus contributed the greatest proportion of weight 49.5% followed by D. rostratus 13.2% and L. senegalensis 10.3%. Recommendation was made for further studies in this aspect. Policies should also be directed to provide social amenities to the communities around the Lake.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 326-330
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