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  • 101
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    Improved fish processing and preservation techniques in Lake Chad (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23336 | 19325 | 2018-04-07 17:13:31 | 23336 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Improved fish processing and preservation techniques in Lake Chad were carried out at Federal College of Freshwater Fisheries Technology, Baga, Borno State, Nigeria. Experiments were carried out using either Kainji Gas Smoking Kiln, Watanabe Kiln, Salting and Solar Drying. The improved (Modern) methods of preservation are faster, more durable, ensure a greater varieties of fish products, render bacteria actions ineffective and above all, products are more appetizing than the traditional preservative techniques but the latter are cheaper and easier to design with local materials.
    Description: Includes:- 3 table.;4 refs.
    Keywords: Fisheries ; Nigeria ; Chad L. ; freshwater environment ; Processing fishery products ; Curing ; Drying ; Processed fishery products
    Repository Name: AquaDocs
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    Format: 63-65
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  • 102
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    The role of middlemen in the marketing of smoked fish in Doron Baga Fish Market, Borno State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23332 | 19325 | 2018-04-07 17:07:41 | 23332 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This paper examines the role of middlemen in the marketing of smoked fish in Doron Baga fish market of Kukawa Local Government Area of Borno State. Data were obtained from 200 respondents using stratified random sampling technique, with the aid of structured questionnaire. Data were analyzed using descriptive statistical tools. Secondary sources of information were also gathered from research papers, reports and journals. The study revealed that, there are two types of middlemen in the Doron Baga fish market: selling brokers (Dillali) accounting for 75% and buying brokers (Yan acha) 25%. The role played by the selling brokers includes selling for the fishermen with commission, lending money to fishermen and providing security for the unsold fish. Buying brokers assist those that want to buy fish while the buyer gives them little amount of money as commission. Brokers get more clients when the fish during periods of maximum catch. The problems the middlemen face are failure of the fishermen to pay back the money borrowed from the selling brokers while buyers hardly trust the buying brokers.
    Description: Includes:- 3 tables.;5 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Baga ; Middlemen ; Fish marketing ; freshwater environment ; Marketing ; Market research
    Repository Name: AquaDocs
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    Format: 49-52
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  • 103
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    Capture fisheries of Kontagora Reservoir, Niger State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23333 | 19325 | 2018-04-07 17:09:15 | 23333 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A study of the capture fisheries of Kontagora Reservoir was carried out between January - December, 2007, using statistical frame and catch assessment survey methods. Five fish families comprising seven fish species were recorded. Hemichromis fasdatus, a cichlid was the most dominant species with mean value of 414.3 and 7715Kg in terms of number and weight respectively. Nineteen commercial fishermen were recorded, with the following fishing gears: gill net, cast nets, long lines, and Malian traps. The fishing craft included wooden canoe. The total mean catch of the fishermen were 4.40(1.36) kg/canoe or 167(52.64) fishes/canoe. The reservoir was productive in comparison with other smaller but productive African lakes. The monitoring, control and surveillance (MCS) system was suggested for management consideration, with emphasis on registration of fishermen and their fishing equipment, enforcement of minimum mesh size of 3” and establishment of community based cooperative scheme.
    Description: Includes:- 4 tables.;1 fig.;10 refs.
    Keywords: Fisheries ; Nigeria ; Kontagora Reservoir ; freshwater environment ; Stock assessment ; Catch statistics ; Fishery surveys ; Landing statistics ; Seasonal variations ; Stock identification
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    Format: 53-56
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  • 104
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    Status of fisheries and aquaculture development in Ekiti State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23340 | 19325 | 2018-04-07 17:19:26 | 23340 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Ekiti State has limited water surface area but blessed with some rivers and seven big reservoirs on which some artisanal fishery is being carried out by over 400 fisher folks. Fish farming in Ekiti state is largely dominated by Clarias gariepinus culture. Interest in fish farming is on the increase as farmers construct concrete fish tanks as small as 1.5m2 as well as series of contour earthen ponds or tanks as big as 30m2. The total number of ponds has grown numerically from 96 at the inception of the state in 1996 to about 2000 in 2008. The move towards private/public partnership in aquaculture development will improve the economic and nutritional status of the region.
    Description: Includes:- 1 table.;3 figs.;5 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ekiti State ; freshwater environment ; Fish culture ; Freshwater aquaculture ; Aquaculture ; Artisanal fishing ; Fishery development ; Stock assessment
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    Format: 76-79
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  • 105
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    Economic analysis of fish in Baga-Doro fish market on the Lake Chad (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23342 | 19325 | 2018-04-08 11:28:41 | 23342 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study compares market performance and profitability of fish in Baga-Doro fish market. Respondents were drawn from a cross section of fish marketers in Baga-Doro fish market. Sixty marketers were selected through a system of random sampling. Data collected were on socio-economic characteristics, cost and returns, and problem associated with fish marketing in the study area. Structural questionnaire were the instruments used for data collection .Percentage were used to describe the socio-economic problems associated with fish marketing, while gross and marketing performance models were used to describe the profitability and marketing margin respectively. The result revealed that almost all the marketers are male, with wholesalers and retailers in proportion of 70% and 30% respectively. The age proportion of the fish marketers comprises mostly of men above 45years of age, with 75% of the entire marketers population. Age between 35 and 44 covers about 20% of the population of the marketers, leaving the remaining 5% to age between 25 and 34. The gross margin was used to measure the profit level, which is expressed as: GM=sales revenue. -cost of Goods sold. Major problems faced were that of transportation and storage. The study recommends credit provision to purchase storage facilities and training workshops to increase awareness among others.
    Description: Includes:- 1 table.;5 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Baga ; Nigeria Doro ; Fish market ; freshwater environment ; Economics ; Fishery economics ; Marketing ; Market research
    Repository Name: AquaDocs
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    Format: 84-86
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  • 106
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    Women and sustainable fisheries exploitation (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23345 | 19325 | 2018-04-08 11:34:48 | 23345 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Sustainability in the extraction of fishery resource need to be proactively upheld if the achichment of the Millennium Development Goals (MDGs) will be anything to go by in Nigeria and other developing countries. The fishery resource, of the biotic component of the environment, and the main focus of this paper, is renewable resource whose existence if not for adverse environmental factors and natural specialization that occurs over thousands of years, is a continuum. The biological attributes of these fauna and flora render them amenable to usage in manners that still allows their continuous existence for the profit of mankind. Ignorance and the consequent inappropriate harvesting methods and uses of the fishery resource make them prone to abuse, imperilment, and eventual extinction. The influential and important roles of women as fishers, fishmongers. processors, concerned citizens of healthy living and organizers of the end use of the fishery resource put women in a vantage position to influence; thereby, enforcing conservation and sustainability in the extraction of the resource when trained in natural resource management. Consequently, women need to be trained and equipped with knowledge such as basic principles in these areas: biological attributes of the aquatic resources, measures of aquatic resource management, and approaches such as co-management, , communitybased and ecosystem-based approaches to fishery management; including simplified principles embedded within international instruments that form the legal frame work for resource management.
    Description: Includes:- 19 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; freshwater environment ; Women ; Fishery resources ; Resource management
    Repository Name: AquaDocs
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    Format: 94-98
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  • 107
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    Fish species composition in Igbedi Creek, Bayelsa State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23346 | 19325 | 2018-04-08 11:44:52 | 23346 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A preliminary survey of fish species composition in Igbedi Creek was carried out between July and September, 2007. Fish samples were collected from the fishermen's catches operating in the Creek and its distributary Ogoubiri River. Collected fish specimens were identified in the laboratory using standard identification keys. Thil1y-seven (37) fish species belonging to 17 families were observed. The most abundant families were the Mochokidae with seven (7) species which constituted 23.79% of the total sample collected followed by the Clariidae (10.78%) and Mormyridae (10.04%).
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Igbedi Creek ; freshwater environment ; Check lists ; Species diversity ; Biodiversity
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    Format: 99-101
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  • 108
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    Fisheries and aquaculture development in Nigeria: an appraisal (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23366 | 19325 | 2018-04-08 18:05:14 | 23366 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Nigeria has a coastline of 853km and over 14 million hectares of inland waters and thus owns significant fisheries. The contribution of fisheries to the Nigerian economy is significant in terms of supply of high quality dietary protein, income generation, creation of employment and enhanced inflow of foreign exchange earnings through shrimp export. However, due over-exploitation of the natural resources, by-catch and discard problem, inadequate infrastructure and social amenities development, inadequate supply of fish feed, fish seeds and slow adoption of new technology and management strategies etc. The domestic fish production (0.55 million tons) has fallen short of the demand (1.5million metric tons). Aquaculture development is the solution to the unpredictable production through capture or artisanal/industrial fisheries.
    Description: Includes:- 21 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; freshwater environment ; Aquaculture ; Brackishwater aquaculture ; Freshwater aquaculture ; Marine aquaculture ; Aquaculture development ; Fishery development
    Repository Name: AquaDocs
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    Format: 174-178
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  • 109
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    Development of a model rotatory fish smoking kiln using agro-wastes as source of fuel (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23359 | 19325 | 2018-04-08 12:13:35 | 23359 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A model fish smoking kiln was designed and fabricated to use agro-wastes (sawdust, palm kernel shell and rice bran) as alternative to conventionally used charcoal (control) as fuel energy source for smoking fish. Clarias gariepinus was washed, brined and smoked in chunks or whole in the kiln. The smoking kiln has an estimated capacity of 40kg of fish/batch with six fish trays and 36 fish hooks. Heat transfer is by conduction and convection. The rotatory wheel and axle on which the fish drying trays were anchored ensured even distribution of heat. The kiln has 69.4% energy efficiency and drying period of 10 hours at an average temperature range of 60 - 120degreesC, depending on the type of agro-waste used as source of fuel energy. The fuel conversion ratio, drying rates and calorific values of the different agro-waste products were also determined. Calorific value of the four agro-wastes ranged between 16.2MJ/Kg in palm kernel to 30MJ/Kg in charcoal. The drying rates of sawdust and rice bran compare favourably with charcoal and they produced smoked fish similar in dryness and quality with fish smoked with charcoal. Palm kernel had the least drying rate of smoked fish (weight/hour) during the 10-hour smoking duration.
    Description: Includes:- 3tables.;2 figs.;9refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Curing ; Processing fishery products ; Cured products
    Repository Name: AquaDocs
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    Format: 148-151
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  • 110
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    Reducing by-catch through fishing gear modification (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23379 | 19325 | 2018-04-10 16:39:49 | 23379 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: There have been considerable efforts in recent years to modify fishing gears and practices to target particular sizes and species of fish (fin and shell) and other marine organisms more efficiently. By catch consideration and gear modification play an important role in regulation of several major fisheries and new by-catch reduction devices and other innovative gear modification are continuously being proposed and tested to mitigate against these problems, among which are the turtle excluder device (T.E.DS) in the shrimp trawls to reduce mortality of endangered sea turtle; sorting grids and scaring device in long line fisheries. This paper assesses the incidence of by catch in fisheries, provides a review of successful developments and application of selective fishing techniques that have been used to achieve by-catch reduction. Recommendations were also made on effective monitoring of fishing gears to ensure that devices aimed at reducing by-catch are included and fishermen use only the appropriate gears to limit by-catch and discards.
    Description: Includes:- 3 tables.;4 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; By catch ; Gear selectivity
    Repository Name: AquaDocs
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  • 111
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    Application of holistic approach for sustainable fisheries: a case study of Kainji Lake Basin (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23383 | 19325 | 2018-04-10 16:47:20 | 23383 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The sustainability of the resources requires much more than paying attention to a single factor, rather looking at it in a holistic manner. Specifically, other economic infrastructure and resources that form the essential components of the fisheries system and fishers livelihood needs to be considered. This to a greater extend will permit choice and mobility of livelihood portfolios, hence reduction in fishing efforts and sustainability of the sector, which eventually translate into development of the sector. However, provision of these facilities are often capital intensive and often left for the government along to provide.
    Description: Includes:- 1 table.;1 fig.;8 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Inland fisheries ; Fishery development ; Fishery management ; Fishery resources ; Fishermen
    Repository Name: AquaDocs
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    Format: 63-66
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  • 112
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    Heavy metals and sensory evaluation of canned tuna fish (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23394 | 19325 | 2018-04-12 07:15:29 | 23394 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In this study, two heavy metals in canned tuna fish were determined after digestion by the AOAC methods. Mercury and Cadmium levels in canned tuna fish were determined by flame atomic absorption photometry. The results of this study indicate that canned tuna fish imported into the country have concentrations well below the petmissible FAO/WHO levels for these toxic metals. Their contribution to the body burden can therefore be considered negligible and the fish seem to be safe for human consumption. For the sensory evaluation, tuna flakes in vegetable oil (Starkist) from Ghana and light meat tuna chunks in sunflower oil (John West) from Thailand were the most preferred while tuna flakes in brine (John West) from Thailand is the least preferred.
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Fisheries ; Health ; Nigeria ; Lagos ; freshwater environment ; Heavy metals ; Processed fishery products ; Canned products ; Tuna fisheries ; Mercury ; Cadmium
    Repository Name: AquaDocs
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    Format: 104-106
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  • 113
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    Citric acid as preservative in smoked catfish (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23387 | 19325 | 2018-04-10 16:52:57 | 23387 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study was carried out to assess microbial quality of smoked catfish (Clarias gariepinus) treated with citric acid during 5-week storage at room temperature. Raw catfish were subjected to the following treatments for 5 minutes prior to smoking: 1-5% citric acid. The non-treated catfish served as control. The control samples showed diverse and high microbial load. All treated smoked sample were negative for E. coli and Streptococcus sp. and low in their TVC, coliform, staphylococcus and fungi and maintained these low count till the end of the 5th week storage. Treatment with 5% gave the best result but I and 2% citric acid are prefered by the consumers. Treatment with 2% was recommended as an acceptable concentration in preserving smoked catfish due to its effectiveness and acceptance by the consumers.
    Description: Includes:-2 tables.;1 fig.;14 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; New Bussa ; freshwater environment ; Preservatives ; Processed fishery products ; Cured products
    Repository Name: AquaDocs
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    Format: 76-79
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  • 114
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    Food habits of Muglids from water around Port Harcourt (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23343 | 19325 | 2018-04-08 11:31:00 | 23343 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The food habits of four species of Muglidae, consisting of Liza grandisquamus, L falcipinus, Mugil curema and , were investigated using the frequency of occurrence and numerical methods of analysis. Also, Relative Gut Length (RGL) of fish specimen measured was calculated from fish gut length. Generally, the food consisted mainly diatoms, blue - green & green algae and detritus. Other food items included annelid, crustacea, nematode, insect parts, dinoflagellates and unidentified organisms. M. curema had the least Species Richness Index (2.827) while L grandisquamus had the highest (4.088). The Shanon - Wiener Diversity Index ranged 0.91 in M. curema to 1.03 in L. falcipinus, while Shanon's Index (HI]) ranged from 2.095 (M. curema) to 2.372(L falcipinus).The male M. bananesis had the least mean RGL of 2.48 ~c 0.17 while female L. falcipinus and L grandisquamus had the highest mean RLG of 3.31 ~c 0.13. The food items observed and the RGL suggest that the muglids studied were herbivorous or omnivorous.
    Description: Includes:- 18 refs.
    Keywords: Ecology ; Fisheries ; Liza grandisquamus ; Liza falcipinus ; Mugil curema ; Mugil bananensis ; Nigeria ; Port Harcourt ; freshwater environment ; Feeding behaviour ; Food preferences ; Stomach content ; Food consumption ; Food composition
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    Format: 87-89
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  • 115
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    Finfish and shellfish composition in old and new Owena reservoirs (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23352 | 19325 | 2018-04-08 11:59:24 | 23352 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Finfish and shellfish fauna composition of the old Owena reservoir, established over 46 years old for drinking and domestic use in Akure metropolis, Ondo town and other villages were re-examined in 2008/2009 to assess long-term changes in relation to activities in the catchment which have included, another new reservoir constructed up stream in 2006. The pre-stocking assessment of the fauna of the newly constructed reservoir was determined. The degree of change between years in total abundance, numbers of taxa and community composition varied considerably between the two sites. These observed differences may be related to increased flora cover in the well established old reservoir, while the new reservoir is still empty with only tilapia as the predominant fish without established aquatic plants. Only one species of fresh water gastropod was found and identified in the new reservoir, while two species of gastropods and one bivalve were identified in the old reservoir. They were found in abundance within their standard length size range of OA2. - 12.5cm. A positive correlation (R2=0.9227) was obtained for samples collected from the' old reservoir, those from the new reservoir gave a contrasting value (R2=0.20 1).
    Description: Includes:- 1 table.;1 fig.;2 plates.;9 refs.
    Keywords: Biology ; Fisheries ; Nigeria ; Owena Reservoir ; freshwater environment ; Finfish fisheries ; Shellfish fisheries ; Check lists ; Species diversity
    Repository Name: AquaDocs
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    Format: 119-123
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  • 116
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    Morphometric and meristic characteristics of some shrimps species from Lagos and Ondo State coastal waters (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23351 | 19325 | 2018-04-08 11:55:34 | 23351 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Four different shrimp species; Penaeus monodon, Macrobrachiwn vollenhovenii, Macrobrachium felicinllm, Parapenaeopsis atlantica were collected from Lagos and Ondo states coastal waters and examined. The length (em), weight (g), head weight (g), tail weight (g), number of upper and lower rostrum teeth were determined. The species varied differently in weight ranging from 100.70g, 48.30g, 12.l0g and 9.20g for each species respectively. Length of 27.60cm, 18.l0cm, 15.70 and 10.40cm were recorded, head weight of 33.90g, 24.90g, 4.40g, 7.40g. Tail weight; 67.30g, 24.l0g, 7.70g and 3.20g were recorded. While the number of upper and lower rostrum teeth in P. monodon, M. vollenhovenni, P. atlantica, and M. felicinum were; 7-10/1-3, 11-14/3-5, 5-1110, 12-16/3-5 respectively. Penaeus monodon had the highest weight (l00.70g) but had rostrum teeth of 8/3. The result obtained for the species in homogenous subsets revealed that in weight (g), M. felicinum and P. atlantica falls into the same subset, while M. vollenhovenii and P. monodon fall into different subsets. In the length (em), all four species fall into different subsets. In the head weight (g), P. atlantica and M. felicinum fall into the same subset while M. vollenhovenii and P. monodon fall into different subsets. In tail weight, it was also applicable. In number of teeth on the upper rostrum all four species fall into different subsets and in number of down rostrum P. atlantica and P. monodon fall into different subset while M. vollenhovenii and M. felicinum fall into the same subset.
    Description: Includes:- 2 tables.;6 refs.
    Keywords: Biology ; Fisheries ; Penaeus monodon ; Macrobrachium vollenhovenii ; Macrobrachium felicinum ; Parapenaeopsis atlantica ; Nigeria ; Lagos Coast ; Nigeria ; Ondo State Coast ; marine environment ; Morphometry ; Length-weight relationships ; Shrimp fisheries
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  • 117
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    Occurrence of Anisakids nematodes on frozen hake (Merluccius capensis) in Yenagoa market, Bayelsa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23419 | 19325 | 2018-04-25 19:19:35 | 23419 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Samples of the frozen hake (Merluccius capensis) were obtained once a week as corresponding to supply in Yenagoa Market Bayelsa State, Nigeria. From every supply of 10 cartons, 10 pieces of hake were examined for the presence of Anisakids nematodes. The incidence was concluded after sampling continuously every week for 8 weeks between September-November 2009. The highest parasite burden (13.2 ~c 2.28) was recorded in the second week and the lowest (8.5~c 2.9) in the 7th week, the highest mean weight of fish sample calculated was 134.80 ~c 19.16 gm in the 4th week and lowest in the 5th week with 118.30 ~c 3.56 g. The mean length was highest (29.10 ~c 1.90cm) in the second week and lowest (26.40 ~c 1.88 cm) in the 7th week. The percentage infection was 96.25% and very alarming since only 3 pieces were not infected as observed from all the samples examined.
    Description: Includes:- 1 table.;4 figs.;13 refs.
    Keywords: Fisheries ; Merluccius capensis ; Nigeria ; Yenogoa ; freshwater environment ; Parasites ; Parasite attachment ; Infectious diseases ; Frozen products ; Fish spoilage
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  • 118
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    Nutritive evaluation of enclosed salted-solar dried Oreochromis niloticus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23385 | 19325 | 2018-04-10 16:50:15 | 23385 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study investigated the effect of enclosed solar drying on the nutritive quality of unsalted and salted Oreochromis niloticus. Sensory and proximate evaluations were carried out on the salted and unsalted fish after drying. Acceptability, appearance, colour, odour, taste and texture of salted and unsalted fish differed significantly (P〈 O.05). The moisture, protein lipid and ash contents differed significantly (P〈 O.05. All dried fish samples from the enclosed dryers showed high levels of acceptability and protein content. However, fish samples brined at 25% and dried using Solar Tent Dryer had the highest acceptability and protein content.
    Description: Includes:- 1 table.;1 fig.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Processing fishery products ; Drying ; Nutritive value
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    Eutrophication as a challenge to sustainable capture fisheries: a case study of Oyun reservoir (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23378 | 19325 | 2018-04-10 16:38:47 | 23378 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: High concentrations of nitrate and phosphate from run-off of nitro phosphate fertilizers from nearby farmlands were recorded from Oyun reservoir, causing cultural eutrophication which affected the catch and fish assemblages; with high abundance of fish in the dry season and dominance of Cichlids while Heterotis niloticus and Barbus occidentalis were endangered. Management techniques to prevent extinction of its fisheries and sustainable exploitation of the fisheries such as watershed and construction best management practices (BMPs) to control eutrophication and fisheries conservation were suggested.
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Pollution ; Nigeria ; Oyun R. ; freshwater environment ; Eutrophication ; Water quality ; Physicochemical properties ; Nitrates
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    Design and construction of 2.14 m. LOA (one sheet) flat bottom canoe (punt) for pond activities (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23382 | 19325 | 2018-04-10 16:46:01 | 23382 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 2.14M length overall (LOA) flat bottom canoe (punt), was designed and constructed using locally available materials. The features of the canoe are least cost material, light weight, shallow draft and easy maneuverability. The canoe's light displacement (weight empty) was 28kg, which was less.than local canoe of same size. When placed on water a draft of 5.5cm was achieved which is 14.8% of its depth (37cm). The capacity of the canoe was 200kg, and the total production cost of N8, 700.00 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. Such easily maneuvered craft can also be used on pond or reservoirs for recreation which include, sport fishing, canoeing
    Description: Includes:- 3 tables.;2 figs.;4 plates;5 refs.
    Keywords: Fisheries ; Nigeria ; Boat construction ; freshwater environment ; Canoes ; Boats ; Surface craft
    Repository Name: AquaDocs
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    Design and construction of 1.5m coracle for pond activities (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23388 | 19325 | 2018-04-10 16:54:44 | 23388 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A coracle 1.5m (LOA) was designed and constructed using hardwood for the frame work and plywood for the base and side covering. It is oval in shape and after construction its light displacement was 24kg and with a dead weight (capacity) of I40kg (2 persons) with a cost estimate of N11,500. (US$83) When placed on water, it floated at a draft of 4.2cm and easily maneuvered by propelling with a paddle. The craft is characterized by light weight, portability, and ability to float at shallow draft. It could be used on shallow water body like ponds for aquaculture thereby increasing fish production.
    Description: Includes:- 2 tables.;1 fig.;4 plates.;6 refs.
    Keywords: Fisheries ; Engineering ; Nigeria ; New Bussa ; Boat construction ; freshwater environment ; Boats ; Construction ; Surface craft
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    Isolation, identification and prevalence of parasites on Oreochromis niloticus from three selected river systems (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23427 | 19325 | 2018-05-02 08:03:50 | 23427 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The prevailence of protozoan and helminthic parasite species occurring on and in the internal organs of Oreochromis niloticus were studied. Twenty samples of a mixture of adult and juvenile individuals of Oreochromis niloticus were randomly obtained from fishermen landing at the jetties of Epe water side, Ikorodu (Odoguyan) river and a brackish water (makoko), between September and and October, 2009, during a period of low rainfall. Samples were eviscerated and the parasites were excised, identified and each specie of parasites was counted. Most of the parasites encountered were of the Protozoa, manogenea, Digenea, Cestoda and Nematoda groups. The infestation was predominantly by Nematoda species and followed by protozoan species. Protozoan parasites like Trichodina sp and Ichyobodo sp were found to be prevalent, in varying magnitude, in most of the fish samples without clear age discrimination. The study reveals that the prevailence of parasites infestation increases with increasing length, size and age of the fish host and different pars of the fish.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Oreochromis niloticus ; Nigeria ; Epe ; Nigeria ; Ikorodu ; Nigeria ; Ogun R. ; freshwater environment ; Parasites ; Identification
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    Functional roles of mangroves of the Niger Delta to the coastal communities and national economy (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23434 | 19325 | 2018-05-02 08:11:31 | 23434 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Mangrove swamps supply various goods and provide invaluable ecological services, especially as critical habitats for fish breeding. These functions are discussed in the context of rural livelihoods of coastal dwellers in the Niger Delta in particular, and the contribution to national economies in general. The decline in capture fisheries production in Nigeria is partly linked to massive mangrove loss in the Niger Delta. This provides basis for urgent evolution of effective mangrove conservation schemes in the Niger Delta and for focused research on the interaction between the delta mangroves and inland/coastal fish recruitment and production dynamics.
    Description: Includes:- 23 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Mangroves ; brackishwater environment ; Mangroves ; Fishery economics
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    The last standing mangrove forest ecosystem southeast of the Niger Delta (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23437 | 19325 | 2018-05-02 08:15:15 | 23437 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Standing on the abandoned jetty at Iwuochang / Upenekang fishing beach in 1999 [Ibeno LGA, Akwa Ibom State] and looking across the Qua Iboe River [en-route the Atlantic Ocean] were strips of luxuriant mangrove vegetation all around the estuary. Surprisingly, 10 years later still standing on the same jetty and looking across the same River also, all the vegetation round about the estuary are now replaced by nipa palms with pockets of mangrove plants. The fear of the paper is that, there may be crash in fish supply from the coastal waters of Nigeria in the near future. The time to act is now and FISON must be pro-active in this coastal re-construction and re-habilitation. Nigeria’s coastal water is a ‘food-basket’; much should be done to protect and jealously cherish it ? else, it may be the last standing mangrove forest ecosystem southeast of the Niger delta.
    Description: Includes:-14 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Akwa Ibom ; brackishwater environment ; Brackishwater environment ; Mangroves ; Fishery development ; Fishery management ; Mangrove swamps
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  • 125
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    Occupation and health hazards in Nigerian coastal artisanal fisheries (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23436 | 19325 | 2018-05-02 08:13:37 | 23436 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: There are more occupational and health hazards in the Fishing Industry than in other occupational categories in the world. In Nigerian Industrial Fisheries, safety measures are regulated while little attention is given to safety standards in the artisanal fisheries. In West Africa, the coastal artisanal canoe fatality rates have been given in 1991-1994 to be 300 to 1,000 per 100,000 fishermen. Thus, the fatality rate in Nigerian artisanal fisheries, (coastal states) has been estimated to be 999 to 3,329 per 100,000 fishermen. The high rate is due to piracy, boundary disputes between fishing communities, unemployment, societal low value for human life and human labour. The paper discusses the various types of accidents associated with artisanal coastal fisheries and give recommendations. Fishermen have rights to safe working conditions in their working environment just as workers in offices and factories on land.
    Description: Includes:-11 refs.
    Keywords: Engineering ; Fisheries ; Sociology ; ASE ; Nigeria ; brackishwater environment ; Hazards ; Navigational hazards ; Hazard assessment ; Health and safety ; Safety regulations
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    Format: 128-133
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  • 126
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    Toxicity of African locust bean effluent on Oreochromis niloticus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23411 | 19325 | 2018-04-12 09:07:36 | 23411 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effects of 96 h sub-lethal concentrations of African locust bean effluent on Oreochromis niloticus were studied using plastic buckets. Packed cell volume (PCY) and histological study of gills and liver were the tissue chemistry parameters investigated. The control buckets contained no effluent. Results revealed increase in ESR (Erythrocyte Sedimentation Rate) decrease in haemoglobin, red blood cell and PCY Yalue of the fish exposed to all sub-lethal concentrations. Damage to liver and gills were noticed in some of the sub-lethal concentrations of all the effluent. Normal situation was observed in all the examined tissues of fish from the control buckets. The African locust bean effluent is toxic on O. niloticus and the lethal concentrations of African locust bean effluent deducted from the 96 hours acute toxicity effect ranged from 3ml.
    Description: Includes:-3 tables.;1 fig.;12 refs.
    Keywords: Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Akwa Ibom State ; freshwater environment ; Toxicity ; Sublethal effects ; Pollution effects
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    Effects of length of delay after slaughter (Lodas) on raw catfish Clarias gariepinus (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23418 | 19325 | 2018-04-25 19:17:12 | 23418 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of delay after slaughter on microbial quality, proximate composition and sensory scores of raw catfish, Clarias gariepinus was evaluated. A total of 52 live catfish (average weight 700.0~c7.0g) were used for the experiment. Ten freshly slaughtered fish samples each were selected for organoleptic assessment at 0, 4, 8 and 12 hours post-slaughter, while three fish samples each were selected for chemical and microbial analyses. Microbial load on fish samples increased significantly (P〈 0.05) with increase in length of delay after slaughter, LODAS. Bacteria isolated included Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Bacillus spp and Staphylococcus aureus. Percent protein and ash contents of fish samples increased with increasing LODAS, while moisture content decreased and lipid was not affected. It was observed that raw C. gariepinus retained most of its physical attributes up to 4 hours post-slaughter. These quality attributes except colour and odour of gills, deteriorated significantly (P 〈 0.05) at every successive four-hour post-slaughter interval. Significant negative correlation existed between LODAS and sensory quality of raw fish (eyes, r = -0.966, P 〈 0.05; gills, r = -0.980, P 〈 0.05; skin, r = -0.998, P 〈 0.01; and odour, r = -0.994, P 〈 0.01). This study established that quality of raw C. gariepinus deteriorated with increasing LODAS and that raw C. gariepinus was not totally unacceptable when delayed for 12 hours after slaughter at ambient temperatures.
    Description: Includes:- 5 tables.;17 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Lagos ; Proximate composition ; freshwater environment ; Organoleptic properties ; Fish spoilage ; Microbiological analysis ; Microbial contamination
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    Aqua-tourism potentials in some fishing sites in bitumen bearing wetlands of Ondo State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23433 | 19325 | 2018-05-02 08:09:53 | 23433 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 24-month survey was conducted during the wet (May- August) and Dry (October ?April) season of 2004 and 2006 along eight economic fishing sites in Ondo State bearing Wetland, with the aim of determining the abundance, species diversity of some ornamental species thus promoting ecotourism potential and preventing the loss of these species in the area during and after exploitation. The study was carried out in 4 study zones namely Odigbo (S1), Ode-Aye (S2), Okitipupa (S3), and Ilaje ese-odo (S4) noted for active bitumen seepage. Fishing potential of the area was assessed using catch per unit effort method as well as physico chemical analysis of water samples obtained from designated sites in the area in accordance with AOAC methodology. Fish compositions were assessed using multifilament gillnet, of different sizes hanging from 38 mm to 178 mm. The results revealed that the area is blessed with 24 economic species of fishes belonging to 13 families which could boost the tourist potential of Ondo State. The percentage composition of families identified varies as follows: Ariidae (2.04%), Anabantidae (3.27%), Bagridae (6.36%), Channidae (4.32%), Characidae (10.62%) Cichlidae (45.65%) Clupeidae (3.94%), Clariidae (11.78%), Hepsetidae (0.95%), Mormyridae (7.42 %), Malapteruridae (1.13%), Schilbiidae (1.76%), Polypteridae (0.76%). The family Cichlidae was the most abundant in the area during the study period. The diversity of fish during the study varied with locations and season .The study showed higher fish population during the dry season than raining season and lower population in study zones highly polluted by bitumen seepages. The study emphasizes the need for sustainable resource management during bitumen exploitation.
    Description: includes:- 2 tables.;1 fig.;12 refs.
    Keywords: Fisheries ; Nigeria ; Ondo State ; freshwater environment ; Fish consumption ; Tourism ; Recreation ; Stock assessment
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    Issues and constraints in the coastal fisheries of the Niger Delta area of Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23435 | 19325 | 2018-05-02 08:12:28 | 23435 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The Niger Delta serves as the economic nerve centre of the Nigeria Federation with its vast oil deposits. However the question is how far has the coastal fisheries thrived in the Niger delta since the discovery of crude oil? Fishing is the predominant occupation in the coastal communities. The Niger Delta is home to Nigeria’s oil industry. However, this ‘blessing’ has become a challenge for the people of the Niger Delta. They have suffered environmental devastation, economic poverty, and constant conflict. This paper discusses issues and challenges facing fisheries development in Niger-Delta area of Nigeria.
    Description: Includes:- 6 refs.
    Keywords: Fisheries ; Nigeria ; Niger Delta ; marine environment ; Fishery development ; Resource development
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    Review of crude oil pollution effects on fish and fisheries of Nigerian waters (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24177 | 19325 | 2018-05-13 19:01:32 | 24177 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper reviews some adverse effects of crude oil pollution on fish and fisheries in Nigerian waters. The main causes of spillage include blowout, sabotage, corrosion of pipeline, equipment malfunction, operations/maintenance error etc. There are spillage records from 1976 to 1997 with respect to the yearly oil spill incidents, the sizes of spill in relation to the ecological operational areas and the causes of oil spills in relation to sources of oil spill within oil operation. Based on the observation from the analyses of the spillage reports, several steps were recommended in order to reduce the incident of crude oil spillage in Nigeria petroleum industry for the safety of our fragile water bodies and the fisheries resources stock in them.
    Description: Includes: 3 tables.;Also includes: 14 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Niger Delta ; freshwater environment ; Crude oil ; Pollution effects ; Water quality ; Oil spills ; Pipelines ; Lake fisheries ; Oil pollution ; Pollution surveys ; Pollution control
    Repository Name: AquaDocs
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    Evaluation of slurry formulations for processing of kilishi of bony tongue (Heterotis niloticus, Cuvier) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24178 | 19325 | 2018-05-13 19:03:41 | 24178 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The kilishi of Heterotis niloticus was produced for determination of appropriate slurry formulations for fish kilishi preparation. Thirty six freshly caught samples of H. niloticus with average weight of 306.20 ~c 18.33g, kilishi of this species was prepared with three different slurry formulations of high (F1), medium (F2) and low (F3) proportions of groundnut dough to spice mixture in the ratio of 1.3: 1.0, 1.0: 1.2 and 1.0: 1.8, respectively. Results of proximate composition indicated that kilishi of the H. niloticus prepared with formulation 3 (F3) recorded significantly higher (p〈0.05) protein content (54.22 ~c 0.01 %) and lower lipid content (8.00 ~c 0.00%), despite recording significantly higher (p〈0.05) moisture content (9.93 ~c 0.07%). Sensory score of kilishi of H. niloticus processed with F3 formulation rated significantly higher (p〈0.05) for taste, flavour and general acceptability with mean scores of 5.94 ~c 0.21,5.77 ~c 0.20 and 5.50 ~c 0.22, respectively. It could be concluded that kilishi of H. niloticus prepared with F3 formulation was the most acceptable hence, recommended for use in kilishi production.
    Description: Includes: 4 tables.;Also includes: 20 references.
    Keywords: Fisheries ; Heterotis niloticus ; Nigeria ; Sokoto ; Kilishi ; Heterotis niloticus ; Spices ; Proximate analysis ; Organoleptic assessment ; freshwater environment ; Freshwater fish ; Fishery products ; Processing fishery products ; Drying ; Packing fishery products ; Organoleptic properties ; Water content ; Enzymes ; Microorganisms
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    The role of biotechnology in aquaculture and fisheries development (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24204 | 19325 | 2018-05-16 15:29:46 | 24204 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Biotechnology per se is not a panacea for the world's problems of hunger and poverty. However, genetic engineering in particular, offers outstanding potentials to increase the efficiency of animal improvement. Thus, biotechnology could enhance global food production and availability in a sustainable way. Case studies from Egypt and India also demonstrate that highly immune genetically modified fishes, transgenic fishes, chromosome engineering and gene banking are very appropriate for fish farmers and consumers in developing countries. As the entire technology can be packaged into the germ cells of fish, it can easily be integrated into traditional small-holder fish farming systems. Except for a few innovative transfer projects, though, the application of biotechnology until now remains concentrated in the industrialized world. Combined with insufficient own scientific and regulatory capacities, the increasing privatization of international aquacultural and fisheries research and the strengthening of intellectual property rights complicate the access of developing countries to biotechnology. Profound constitutional adjustments are therefore essential to ensure that biotechnology does not bypass the poor.
    Description: Includes: 15 references.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ebonyi State ; freshwater environment ; Biotechnology ; Sustainability ; Genetically modified organisms ; Gene banks ; Fish culture ; Aquaculture development ; Food security
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    Microbial load on smoked fish sold in Ibadan, Oyo State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24208 | 19325 | 2018-05-19 06:39:34 | 24208 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The microbial load of four different fish species from five different market locations in Ibadan metropolis were determined using standard microbiological procedures. The bacteria count of fish sampled from Ojo market was the highest while the bacteria count of the fish sample from Bodija market was the lowest. There was no significant difference (p〈0.05) in the microbial load of the fish sampled from various market locations in Ibadan metropolis. Similarly, there was no significant difference (p〉0.05) in the microbial load on various fish species sold in Ibadan metropolis. The isolated bacteria from the study were: E. coli, Salmonella spp, Klebsiella spp, Staphylococcus aureus, Aerosomonas spp, Pseudomonas spp, Vibrio spp, Serratia spp, Chromobacterium spp, Enterobacteria spp and Shigella spp. The fungi count of fish sampled from Omi markets was the highest while the fungi count of the fish sampled from Ojo market was the lowest. The following fungi were however isolated from the study: Aspergillus flavus, Penicillium spp, Fusarium oxysporum, Trrichoderma spp and Ceotrichium albidium. The study shows that reheating may be necessary to destroy or inactivate micro-organisms in smoked fish before consumption.
    Description: Includes: 2 tables and 2 figures.;Also includes: 17 refernces.
    Keywords: Fisheries ; Nigeria ; Ibadan ; Bacteria ; Fungi ; Market ; Fish species ; freshwater environment ; Microbial contamination ; Microorganisms ; Bacteria ; Freshwater fish ; Cured products ; Sample contamination ; Fungi ; Public health ; Quality assurance ; Disinfection
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    Morphometric features and proximate body composition of rocky freshwater prawn (Caridina africana, Kingsley 1882) at Erin-Ijesa waterfalls, Osun State Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24209 | 19325 | 2018-05-19 06:41:34 | 24209 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: An investigation was conducted on the morphometric features and proximate body composition of rocky freshwater prawn, Caridina africana occurring at Erin-Ijesa Waterfalls in Osun State, Nigeria. The adult prawns were collected at the first layer of the Waterfalls using scoop nets and locally fabricated sieves because of the shallow nature of the water body and tiny size of the species. Morphometric features were measured using measuring board and Vernier calipers while the proximate analysis was determined by atomic absorption spectrophotometry in the laboratory. The morphometric variables placed the species correctly into the Infra order Caridea and family Atyidae because the first and second chelipeds were shorter than the remaining three pairs of walking legs. Male prawns were significantly bigger (p〈0.05). than the females as revealed in the morphometric features. The proximate analysis showed that C. africana is composed of 58.79% protein, 5.42% lipid, 11.56% carbohydrate, 14.7% ash and 0.21 % crude fibre. The micro-nutrient composition included iron, zinc, copper, nickel and cadmium. The values for these nutrients make the study to suggest that C. africana could be a nutritive food bio-material for humans and other livestock nutrition especially the fin-fish aquaculture programme.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Biology ; Fisheries ; Caridina africana ; Nigeria ; Erin-Ijesa waterfalls ; Morphometrics ; caridina africana ; Proximate composition ; Micrinutrient ; Erin-Ijesa waterfalls ; freshwater environment ; Morphometry ; Biochemical analysis ; Shrimp fisheries ; Body conditions ; Nutritional requirements ; Nutritive value ; Lake fisheries ; Artisanal fishing ; Males ; Females
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    Heavy metals concentrations in Chrysichthys nigrodigitatus in Arakanga Reservoir, Abeokuta, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24218 | 19325 | 2018-05-19 06:58:26 | 24218 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigates the morphometric and meristic features of Chrysichthys nigrodigitatus in relations to heavy metal concentrations. Varying sizes of Clarias nigrodigitatus were obtained with the help of fisher-folks, from Arakanga reservoir Ogun state, Nigeria. Water samples were also collected alongside with fish samples per week and five of the samples were sent to laboratory for analysis to determine the presence of four heavy metals in both fish and water. Lead, Cadmium, Nickel and Arsenic were investigated by atomic absorption spectrophotometer (AAS). Four tissues; gills, kidney, liver and muscle were compared with the level of metals in the water. Lower concentrations of metals were recorded in water except for Cadmium which is higher, than in fish. Lower concentration of heavy metals found in fish and water was less than that recommended by the World Health Organisation (WHO's) guideline for maximum concentration recorded in the tissue of the samples. Lead was found to be dominant in the gills of C. nigrodigitatus, while Cadmium was found to be highest in the water sample from Arakanga reservoir. There is significant difference (P〈0.05) in Nickel and Arsenic concentration in the tissues of C. nigrodigitatus and water. It was concluded that though the heavy metals of interest were present in measurable quantities, they were still within safe limits for consumption.
    Description: Includes: 11 references.
    Keywords: Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Ogun State ; Arankanga reservoir ; freshwater environment ; Heavy metals ; Freshwater fish ; Reservoir fisheries ; Artisanal fishing ; Lead ; Toxicants ; Pollution effects ; Quality assurance ; Morphometry ; Meristic counts ; Water analysis ; Freshwater pollution ; Nickel ; Arsenic ; Cadmium ; Fish consumption ; Health and safety
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    Food and habits of the Batrachoid, Batrachoides liberiensis off the Qua Iboe River estuary, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24223 | 19325 | 2018-05-19 07:09:15 | 24223 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: We studied the trophic attributes of the toadfish, Batrachoides liberiensis off the Qua Iboe River estuary Nigeria, between August 2008 and July 2009. The fish species has no well defined stomach; the intestine was used as gut. Gut contents analysis of 360 specimens of the toad fish revealed that 11 food items (Penaeus notialis, Sersama alberti, crayfish remains, unid fish, fish bones, fish remains, unid gastropod, insect remains unid clam and sand grains)] were ingested. The food items were re-assigned into 6 major ecological categories based on food ponderal index (%FPI): Pisces (FPI= 35.33%), Crustacea (FPI= 20.73%), unid Gastropoda (FPI=14.32%), Mollusca (FPI= 12.48%), Insecta (FPI= 11.64%) and FPI of 5.50% sand grains. Males were significantly higher in feeding intensity (Average gut fullness, AGF: t = 2.083, 358 df, P〈0.05) vis-a-vis the females. There were similarity in rank-order of the seasonal dietaries (spearman-rank correlation: rs = 0.871, P〈0.02). Sex ratio was male-biased. B. liberiensis in the Qua Iboe estuary is carnivorous, exhibiting affinity to piscine as major dietaries.
    Description: Includes: 11 references.
    Keywords: Ecology ; Fisheries ; Batrachoides liberiensis ; ASE ; Nigeria ; Iboe River. ; Batrachoides liberiensis ; Qua Iboe River Estuary ; Nigeria ; Trophic attributes ; brackishwater environment ; Food ; Feeding ; Stomach content ; Food consumption ; Artisanal fishing ; Fishery surveys ; Food composition ; Food preferences ; Brackishwater fish
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    Effect of zinc on the distribution of major cations and anions in the muscle of the fresh water catfish Clarias gariepinus (Burchell, 1822) collected from Ebonyi River, South East Nigeria (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24214 | 19325 | 2018-05-19 06:50:34 | 24214 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of zinc exposure evaluated during a four day exposure periods at 13.88ppm, 26.75ppm, 53.5ppm,107ppm and 214ppm to Clarias gariepinus sub-adults showed the 96h LC50 as 26.62ppm. The threshold value was 20.30ppm. The muscle of the exposed fish analyzed showed a significant decrease in all the major cations and anions (Na+, CL-, Ca2+ K+, Mg2+) at (p〈0.05). The research revealed that there was no total inhibition of uptake of the cations and anions and also that uptake of these metals, that is cations and anions (Na+,-CL-, Ca2+ K+, Mg2+) increased rapidly during the 24 hours and dropped at 48 hours and 72 hours and gradually increased at the end of 96 hours showing that it was time dependent. During exposure period, affected fish stood in upright position with their snouts above the water surface, gasping for air. Observation of the exposed fish showed that they were peeling of skin, increase in opercula movement, erratic swimming, quietness and finally death. This research therefore recommends that zinc should be applied appropriately at 26.30ppm to avoid death of fish, man and other aquatic organisms that are the chief consumer.
    Description: Includes: 13 references.
    Keywords: Pollution ; Fisheries ; Clarias gariepinus ; Nigeria ; Ebonyi State ; Ebonyi River ; Zinc ; Muscle ; Cations ; Anions ; Clarias gariepinus ; Zinc ; Freshwater fish ; Cations ; Pollution effects ; Trace metals ; Bioaccumulation ; Muscles ; Pollutants ; Anions ; River fisheries ; Lethal limits
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  • 138
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    Environmental impact of crude oil spillage at Agoubiri community in Southern Ijaw local government area of Bayelsa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24228 | 19325 | 2018-05-19 07:18:46 | 24228 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Assessment of the result of crude oil spillage that occurred at Aguobiri Community in Southern Ijaw Local Government Area of Bayelsa State in 2007, is presented in this paper. The results of the laboratory analysis of water samples for Total Hydro carbon content (THC) was 1.56mg/l, 2.94mg/l and 23.96mg/l at 300m,200m and 9m respectively from the spill point. Heavy metals values in plant tissues were Vanadium-2.1 4mg/kg, Nicke-4.06mg/kg and THC of 09,309.5mg/kg at 300m from the spill point. The values of heavy metals in soil samples were Vanadium 2.14mg/kg and Nickel4.19mg/kg and THC of 133,886.20mg/kg at 300m from the spill point. This is to buttress the fact that oil spill is not limited to the site of occurrence but spreads to affect flora life far away from the spill point. Consequently, this negatively impacts farming and fisheries activities in such areas.
    Description: Includes: 9 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Bayelsa State ; Crude oil spill ; Heavy metals ; Total Hydrocarbon ; Aguobiri ; freshwater environment ; Environmental impact ; Crude oil ; Oil spills ; Heavy metals ; Fisheries
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  • 139
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    Organoleptic assessment of processed freshwater clam (Galatea paradoxa) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24186 | 19325 | 2018-05-16 14:43:21 | 24186 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Organoleptic characteristcs and eating acceptability of different processed fresh water clam (Galatea paradoxa) from Bayelsa state, Nigeria was evaluated. One hundred and fourteen (114) samples of clam (Galatea paradoxa) used for the processing experiment were obtained from Amassoma market. All samples were processed traditionally viz: smoked-dried, cooked with banga sludge and fried respectively. Thirty six (36) member taste panel were randomly selected to evaluate the organoleptic characteristics of the samples. Acceptibility of product was scored on a 6-point hedonic scale. The highest ratings of organoleptic characteristics were recorded for fresh water clam samples prepared by frying (5.24 ~c 0.54) while the least (4.47 ~c 0.27) was recorded for samples that were prepared by cooking with water (P〈0.05). The results revealed that males had a preference for fried clam product while females had equal preference for clams fried and cooked in palm kernel sludge. The highest acceptability (88.89%) was observed in the samples that were subjected to frying method, while the least (80.56%) was recorded for samples that were smoked-dried. More research should be geared towards packaging these products for export.
    Description: Includes: 3 tables:;Also includes: 9 references.
    Keywords: Fisheries ; Galatea paradoxa ; Nigeria ; Niger Delta ; Acceptability ; Clams ; Organoleptic ; Processing ; freshwater environment ; Clam fisheries ; Shellfish ; Organoleptic properties ; Acceptability ; Processed fishery products ; Evaluation ; Cured products ; Acceptance tests ; Nutritive value ; Proteins ; Texture ; Odour ; Taste tests ; Freshwater molluscs ; Product development
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  • 140
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    Nutrient composition of frozen and smoked fish specimens of Oreochromis niloticus, Labeo coubie and Mormyrops deliciosus from River Niger (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24195 | 19325 | 2018-05-16 15:12:41 | 24195 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish is one of the most nutritious diet on earth, and contributes a considerable proportion of its protein to the Nigerian populace. Fifty-four specimens composing of six samples from each species, were analyzed in frozen and smoked states, monthly. Each set of six specimens were cut into two equal parts and randomly re-arranged into two groups. One group was smoked while the other was preserved in the freezer (at-2~'C) for 5 days. The highest moisture content was observed in frozen samples of Mormyrops deliciosus thus: (77.14 ~c 11.05%). Smoked O. niloticus had the highest protein content (26.79 ~c 0.74%) while the least was observed in frozen Mormyrops deliciosus (13.37 ~c 2.57%). Smoked samples of Oreochromis niloticus recorded the highest fat content accounting for a value of (25.97 ~c 0.51 %) while the least was observed in frozen Mormyrops deliciosus (7.97 ~c 0.45%). It could be concluded that while frozen samples loosed nutrient, smoked ones gained nutrients in all three species. The study recommends that fish be consumed in their smoked state, in preference to frozen ones, in response to higher nutritive value. Oreochromis niloticus which recorded the highest nutritive value in crude protein content, should be consumed more, followed by Labeo coubie and Mormyrops deliciosus in that order.
    Description: Includes: 2 tables.;Also includes: 10 references
    Keywords: Fisheries ; Mormyrups deliciosus ; Oreochromis niloticus ; Labeo coubie ; Nigeria ; Niger R. ; Nutrient omposition ; Frozen ; Smoked ; Oreochromis niloticus ; Labeo coubie ; Mormyrups deliciosus ; freshwater environment ; Freshwater fish ; Frozen products ; Cured products ; Nutritive value ; Comparative studies ; Processed fishery products
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  • 141
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    Trophic ecology of fishes: consolidating the basic (traditional) methods (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24226 | 19325 | 2018-05-19 07:15:01 | 24226 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Studies of food and feeding ecology are important to investigate trophic interrelationships of fishes in their resident water bodies. These are usually achieved using various important methods. However because no single measure gives an overall representation of the feeding habits of fish, best results are achieved only when methods are used to complement one another. This paper reviews various methods used in studying trophic fish ecology and suggests consolidation of the traditional or basic methods with relevant statistical indices and local ecological knowledge. More advanced methods are also proposed as valuable tools because they compensate for some possible errors that may arise from the use of quantitative methods.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Oyo State ; freshwater environment ; Ecosystems ; Trophic levels ; Interspecific relationships ; Trophic relationships ; Food ; Ecology ; Consolidation ; Methodology ; Feeding behaviour ; Stomach content ; Food webs ; Statistical analysis ; Fish culture
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  • 142
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    Migration in fishes: a review (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24232 | 19325 | 2018-05-19 07:26:04 | 24232 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A review of migratory activity in fishes reveals that migration is important for the completion of life cycle. Recent studies have increasingly demonstrated the wide spread existence of spatio-temporal variations in the abundance and distribution of species of freshwater fishes, previously assumed not to move between habitats. These movements are often for spawning, feeding and refuge, and in many cases are fundamental for the successful completion of life cycles. Chemical and physical changes in water environment affect the migration of fish. Most fish undertake feeding, breeding or wintering migrations. A number of studies have documented the influence of freshwater and ocean conditions, climate variability and human impacts resulting from impoundment and aquaculture on fish migration.
    Description: Includes: 27 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Borno State ; freshwater environment ; Migrations ; Geographical distribution ; Spatial variations ; Temporal variations ; Freshwater fish ; Life cycle ; Environmental conditions
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  • 143
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    Reproductive efficiency as a function of age in estuarine catfish, Chrysichthys nigrodigitatus of the Cross River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24206 | 19325 | 2018-05-16 15:35:04 | 24206 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study was conducted on the reproductive efficiency of Chrysichthys nigrodigitatus of the Cross River. The objective was to determine the influence of age on eggs size and fecundity. Forty four females of Chrysichthys nigrodigitatus were sampled from April, 2011 to March, 2012. Fecundity and eggs size were measured in relation to fish size. The relationship between egg size and fish size produced a parabolic curve. This implies that younger fish and older fish were less efficient in terms of eggs size and quality while the middle aged fishes were more efficient in terms of eggs size and quality. Similarly, there was an inverse curvilinear relationship between number of eggs per unit weight and somatic weight of the fish. Younger fish are less efficient because of the physiology of growth, while the older fishes are less efficient because of reproductive senescence. Management strategy for the stock therefore requires the conservation of the middle aged individuals for increase in reproduction. Also in aquaculture the middle aged class should be used as broodstock for excellent results.
    Description: Includes: 2 figures.;Also includes: 13 references.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Cross River ; Brackishwater fish ; Reproduction ; Efficiency ; Biological age ; Eggs ; Fecundity ; Size ; Food fish
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  • 144
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    Length-weight relationships and relative condition factor of twenty important marine fish species off Lagos coast, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24203 | 19325 | 2018-05-16 15:28:10 | 24203 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on the length-weight relationship and condition factor (k) of 6,254 fish samples representing 20 species belonging to 11 families of important marine fishes off Lagos coast, Nigeria. They were collected with a trawl net (cod-end 20mm mesh size), trawled at different depth ranging from 10m-100m between May and June 2009. The estimated 'b' value (regression coefficient) of the equation W = aLb ranged between 2.29 and 3.46 with mean and mode values of 2.78 ~c 0.28 and 2.79 respectively while the 'a' value (regression constant) ranged between -2.6019 and -0.9023 with mean value of -1.6899 ~c 0.40. The condition factor (k) ranged between 0.52 and 11.89 with mean values of 2.71 ~c 2.64. Fish species of Nigeria coastal water are dominated by Pseudotolithus senegalensis which is about 13.4% of the total fish samples and their growth trend is mostly isometric (exhibit dimensional equality of the body parameters). All the species studied are in good condition (k〉 0.5).
    Description: Includes: 1 table and 5 figures.;Also includes: 20 references.
    Keywords: Ecology ; Fisheries ; Pseudotolithus senegalensis ; ASE ; Nigeria ; Lagos Lagoon ; Lenght-weight relationship ; Condition factor ; Marine fish species ; Trawl ; Isometric ; Nigeria ; freshwater environment ; Length-weight relationships ; Condition factor ; Marine fish ; Trawl nets ; Coastal waters ; Fishery surveys ; Marine fisheries ; Check lists ; Population structure ; Dominant species
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  • 145
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    Influence of uptake route on the bioconcentration of polycyclic aromatic hydrocarbon (PAH) by the Red Sea bream (Pagrus major) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24244 | 19325 | 2018-05-20 05:41:08 | 24244 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species have different responses to polycyclic aromatic hydrocarbons (PAHs) exposure to crude oil. Some achieve PAH biotransformation while others have bioconcentration. These trends may be specie-specific and may depend on PAH uptake route - through water or food. PAH uptake in the red sea bream, Pagrus major for PAH biomonitoring in Asian oil spill waters was assessed in water-borne and dietary exposures of the fish to four representative PAHS. In the water-borne exposure, juvenile fish of average weight 83g were exposed in a flow-through toxicity test for ten (10) days to a mix of 30~kg/L phenanthrene, pyrene, and chrysene; 3~kg/L of benzo[a] pyrene (B[a]P). In the dietary exposure, 20 juveniles of average weight 80g were fed diets with 10 n g/g phenanthrene, pyrene and chrysene, and 2 n g/g of B[a]P for ten days. Fish livers were sampled for PAH concentrations on days 0, 2, 5 and l0 in both exposures. Phenanthrene PAHs were accumulated in the water-borne exposure with concentrations increasing with duration of exposure. Phenanthrene had the highest concentration of 2210 ng/g on day 10, while pyrene and chrysene were 170 and 45 ng/g respectively. B[a]P was not accumulated. ln the dietary exposure, all the test PAHs were accumulated. Bioconcentration decreased with duration of exposure, unlike in the water-borne exposure which was the reverse. Phenanthrene, with an initial 58 ng/g concentration, was reduced to 10.6 ng/g on day 10. B[a]P accumulation in the dietary exposure is significant. PAH accumulation was higher in the water-borne exposure than in the dietary exposure and PAH bioconcentration in the fish depends on uptake route.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Pollution ; Pagrus major ; Nigeria ; Makurdi ; freshwater environment ; Aromatic hydrocarbons ; Freshwater fish ; Crude oil ; Bioaccumulation ; Response analysis ; Biomanipulation ; Pollution monitoring ; Controlled conditions ; Toxicity tests ; Oil pollution
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  • 146
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    Influence of indices of reproduction on condition factor and some morphometric features of Tilapia guineensis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24246 | 19325 | 2018-05-20 05:44:32 | 24246 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The influence of indices of reproduction (Gonadosomatic index-GSI-and Hepatosomatic index -HSI-) on condition factor and morphometric features of Tilapia guineensis were examined using 160 fish comprising 70 females and 90 males. Total length, standard length and body depth were measured to the nearest 1cm, while each fish was weighed to the nearest 0.1 g. The gonads and liver were removed and weighed separatdy to the nearest 0.00lg. Gonadosomatic index, Hepatosomatic index and condition factor were calculated. Correlation analysis between the reproductive indices and the external features of the fish were carried out. Results revealed positive correlation between gonadosomatic index and body depth and between GSI and standard length in both sexes, indicating the dependence of gonadal development on body depth and standard length in both sexes. However, the relationship between the reproductive indices and total length was significant only in the female. The relationship between HSI and Standard length was also significant in female (P〈0.01, r = 0.707) and male (P〈0.05, r = -0.216), but in positive and negative direction-respectively. The correlation between the reproductive indices and condition factor were not significant in both sexes. The correlation of GSI and HSI in male (r = 0.062) was not significant, while the positive correlation of GSI and HSI in female (r= 0.300) was significant (P〈0.05). It was therefore concluded that body depth and standard length could be important factors in determining spawning success in both sexes, while total length may be an additional tool in determining spawning success only in female T. guineensis.
    Description: Includes: 24 references.
    Keywords: Fisheries ; Tilapia guineensis ; Nigeria ; Port Harcourt ; Condition factor ; Gonadosomatric index ; Hepatosomatic index ; Morphometric feature ; Spawning ; Tilapia guineesis ; freshwater environment ; Reproduction ; Condition factor ; Morphometry ; Freshwater fish ; Sex ; Gonads ; Spawning ; Length-weight relationships ; Gonadosomatic index
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    Fish species composition/diversity of the Warri River, Niger Delta Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24240 | 19325 | 2018-05-20 05:30:49 | 24240 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Changes in water quality caused by industrialization and technological advancement, affect fishery resources. The Warri River like many other water bodies in Niger Delta, Nigeria are experiencing side effects in terms of pollutant build up cum destruction of fishery resources. This study investigated the fish species composition/diversity of the river in comparison to the baseline studies of previous researchers. Nine sampling locations were chosen including, Jeddo, NNPC Jetty, Nigeria ports Authority jetty, Main Warri market, Delta Steel Jetty, Shell Ramp, Udu Bridge/market Ugbolokposo and Agbarho.Fish species were collected from the respective nine Locations monthly for 24 months. Fish were obtained from landings of local fishermen every fortnight with prior arrangement. Highest diversity index of 3.48 occurred at shell Ramp/Globestar, while the least value of 2.63 was recorded at NNPC Jetty. The condition factor of most fish species in the study were above 1.0, though more species were better conditioned in location 1 (Jeddo). The catfish families probably due to their hardy nature were best conditioned of all families represented. Thirty four fish species recorded in this study compared to 91 species obtained in previous works of 1989 -1994 reflects a sharp drop in species diversity.
    Description: Includes: 18 references.
    Keywords: Fisheries ; Pollution ; Nigeria ; Warri River ; Fisheries resources ; Warri River ; Specie diversity ; Pollutants ; Niger Delta ; freshwater environment ; Fish ; Check lists ; Species diversity ; Water quality ; Industrialization ; Fishery resources ; Pollutants ; Condition factor ; Baseline studies ; Aquaculture development ; Technology transfer
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  • 148
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    Assessment of some heavy metals pollution in Clarias gariepinus in the vicinity of Lake Chad, Nigerian sector, using energy dispersive X-ray fluorescence (EDXRF) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24243 | 19325 | 2018-05-20 05:39:07 | 24243 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Globally, aquatic ecosystems are highly polluted with heavy metals from anthropogenic and terrigenous sources. The objectives of this study, is to portray the use of EDXRF for the analysis of heavy metal pollution in Clarias gariepinus. C. gariepinus were collected from Dumba, Lake Chad, Nigerian sector and analyzed with EDXRF with 〈sup〉109〈/sup〉Cd as excitation source of the samples. The concentrations of Cadmium, Chromium, Copper, Manganese, Iron, Lead and Zinc (Cd, Cr, Cu, Mn, Fe, Pb and Zn) in mg/kg were determined in C. gariepinus and were compared with World Health Organization (WHO, 1985) and Federal Environmental Protection Agency (FEPA, 2003) to ascertain the level of Cd, Cr, Cu, Mn, Fe, Pb and Zn in C. gariepinus from Dumba. The results indicated that C. gariepinus is polluted with Cr, Cu, Mn, and Pb when compared with permissible limit of WHO, 1985 and FEPA, 2003. Therefore, the consumption of C. gariepinus from Dumba may pose a health risk.
    Description: Includes: 12 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Borno ; Chad L. ; freshwater environment ; Heavy metals ; Pollutants ; Freshwater fish ; X-ray fluorescence analysis ; Standards ; Acceptability ; Pollution effects ; Cadmium ; Chromium ; Copper ; Manganese ; Iron ; Lead ; Zinc
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  • 149
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    Length-weight relationship and condition factor of Citharinus citharus (Geoffroy Saint-Hilaire, 1809) from Lake Akata, Benue State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24247 | 19325 | 2018-05-20 05:46:20 | 24247 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Length-weight relationship and changes in the condition factor of Citharinus citharus of the Lake Akata, an ox-bow Lake of River Katsina-Ala, a tributary of River Benue was studied. A total of five hundred and five (505) fish samples were collected from May 2008-April 2009. Length-weight relationship of fish was estimated from the equation: W = a.Lb which was transformed to base 10 logarithm, and condition factor (k) was determined using the equation: K=100W/L3. Both sexes of C. citharus in Lake Akata exhibited negative allometric growth pattern. The combined length weight relationship of C. citharus sexes was LogW = - 1.7738 + 2.9044 LogL (r2 = 0.9527). The coefficient of determination for the Length-Weight relationship for both sexes of C. citharus in Lake Akata was strongly positive. The mean condition factor for the combined sexes was 1.37 ~c 0.02, but individually, female C. citharus were in better condition (1.44 ~c 0.03) compared to the males (1.29 ~c 0.02). The condition factor of C. citharus in dry season (1.37 ~c 0.03) was not significantly higher than that of (1.36 ~c 0.03) in wet season (p〉0.05). This means the fish species are living well in the lake as the 'K' value are greater than one.
    Description: Includes: 25 references.
    Keywords: Ecology ; Fisheries ; Citharinus citharus ; Nigeria ; Akata Lake ; Growth pattern ; Seasonal condition ; Citharinus citharus ; Lake Akata ; freshwater environment ; Length-weight relationships ; Condition factor ; Freshwater fish ; Lake fisheries ; Growth rate
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    Challenges of inland artisanal fish production in Nigeria: economic perspective (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24600 | 19325 | 2018-05-21 12:14:25 | 24600 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fishery production is significant to Nigerian economy in view of its roles in providing cheap source of food/nutrition security, income, employment, serves as source of foreign exchange, particularly those of the riparian communities. Despite these significant roles, fisheries subsector is faced with huge challenges, such as: decreasing yield, inefficient management of fishing policy, inadequate technological and commercial knowledge among others, thereby limiting its production potentials. The possibility of fish production especially artisanal fisheries to match up with fish productivity in the economy depends on fishing operation, efficient use of laboour, sustainable and efficient management of fishing policy. Therefore the essence of this study is to review the challenges in fish production in Nigeria, Economic perspective, with emphasis on the role of fisheries in economic development, decreasing fish yield, market forces and resource inefficiency.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Nigeria ; Fishery ; Economic perspective ; Challenges and production ; freshwater environment ; automation
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    Format: 134-136
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    Efficiency of different traps for silver catfish fishery and its aquaculture implications in the face of climate change (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24601 | 19325 | 2018-05-21 12:17:22 | 24601 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Climate change has the potential to severely impact coastal and inland environments and ecosystems, and by extension fisheries and aquaculture. Coastal regions of the world are already experiencing flooding due to rise in sea level. In recent times, salinization of coastal areas due to flooding from storm surges and high tidal influence has been observed. Aquaculture is a fast growing agri-business venture in Nigeria presently and many coastal communities derive their livelihood from it. The culture of freshwater fish species that are very sensitive to high salinity may be threatened leading to mortality of stocked fish and loss of livelihood for coastal population. Consequently, there is urgent need for development and domestication of the Silver catfish, Chrysichthys nigrodigitatus that can tolerate higher salinity more than Mudcatfish (Clarias gariepinus). This will help mitigate the impact of salinization of coastal areas arising from sea water flooding on culture of fresh water fish species.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Clarias gariepinus ; Nigeria ; Climate change ; Silver catfish ; Chrysichthys nigrodigitatus ; freshwater environment ; automation
    Repository Name: AquaDocs
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    Format: 137-139
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    Effects of sub-lethal concentrations of glyphosate on behaviour and some biochemical parameters of African catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24614 | 19325 | 2018-05-24 09:35:20 | 24614 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The sub-lethal effect of glyphosate on behavior and some biochemical parameters of African catfish, Clarias gariepinus were investigated using static renewal bioassays and continuous aeration for a period of 28 days using varying concentrations (100ppm, 200ppm, 300ppm, 400ppm and 500ppm). During the exposure period, the fish showed different abnormal behaviours such as restlessness, loss of balance, respiratory distress, grouping together, darting movements, loss of equilibrium, mucous secretion and erratic swimming. At the end of the experiments, the fish were sacrificed and the blood samples were collected. The gill and liver of the fish were removed from biochemical bioassay. Compared with the control, the result showed a significant increase (P〈0.05) in the activities of alanine amino transferase (ALT), and aspartate amino transferase (AST), in both the blood and the gill of exposed fish except in liver where it showed a significant reduction. However the values of lactate dehydrogenase (LDH) and superoxide dismutase (SOD), showed significant increase in the blood with a noticeable decrease in both the gill and liver of exposed fish. The study showed that sub-lethal concentratiom of glyphosate are harmful to Clarias gariepinus. This study shows that sub-lethal concentrations of glyphosate is harmful to Claria gariepinus. The implication of these results in rational exploitation and conservation of fishery resources and the public health risk consuming glyphosate-exposed to fish are highlighted.
    Description: Includes: 22 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Glyphosate ; sub-lethal ; Biochemical ; Conservation ; Public health ; freshwater environment ; automation
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    Observation on the sex ratio, fecundity, egg size and gonadosomatic index of grey mullet (Mugil cephalus) from high brackish tropical lagoon (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24627 | 19325 | 2018-05-22 06:26:49 | 24627 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The 2661 specimens of the striped mullet, Mugil cephalus L. used for this study, were collected from high brackish lagoon in southwest Nigeria for 24 months. The size of the 2661 specimens of M. cephalus used for this study ranged from 1.7- 29.5cm standard length (total lenght 1.9 to 39.0cm). The sex ratio for M. cephalus was 1:0.53 and this showed a statistically significant (p〈0.05) dominance of the male over the females for the size range. The fecundity estimates varied from 635,568- 1,520,185 and was positively correlated to the fish and weight. Oocyte diameter averaged 409.64 ~c 40.67pm and this is indicative of an early stage of gonad maturation of the specimens in the lagoon before final spawning occurred. The GSI indicated that spawning activity occurred from December to May in the open ocean.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Mugil cephalus ; ASE ; Nigeria ; Lagos Lagoon ; Mature ; Spawning ; Specimen ; Male ; Female ; brackishwater environment ; automation
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    Format: 241-246
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    Growth pattern and specificity of attachment of lagoon crab (Callinectes amnicola) fouled with barnacles (Chelonibia patula) from Lagos Lagoon, Southwest Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24635 | 19325 | 2018-05-23 07:59:06 | 24635 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The growth pattern and condition factor (K) of 810 Lagoon crabs (Callinectes amnicola) fouled with Barnacles (Chelonibia patula), collected from Makoko Jetty, off Lagos Lagoon between April-September 2011 were studied. The carapace length f C. amnicola examined ranged from 3.8cm-8.6cm while the carapare width ranged from 9.5cm-15.4cm. The total weight ranged from 53.1g to 165.0g, indicating that increase in length correspond to increase in weight, thereby suggested that C. amnicola from Lagos Lagoon exhibited a negative allometric growth. The correlated coefficient 'r' for the crabs was 0.68, showing a low correlation between carapace length weight in the lagoon crabs fouled with barnacles. The condition factor (K) values of C. amnicola fouled with barnacles ranged from 3.2-9.7 with a mean value of 5.4. The highest K-value was recorded for the size group 3.5-4.4. The value decreased with increased length of C. ammcola. The sex ratio (1:80) indicated that there were more females (98.8%) than males (1.2%), 12 (1.5%) of the 810 lagoon crabs examined were heavily fouled with barnacles distributed all over the points of attachment with the cora having the most attachment (91.6 6%). Average diameter of the barnacles attached to the crabs ranged from 0.23cm to 1.85cm. The distribution shows that large-sized crabs had much banacles attached to them than small-sized crabs, with greater barnacles found in the females than in the males.
    Description: Includes: 25 references.
    Keywords: Ecology ; Fisheries ; Callinectes amnicola ; Chelonibia patula ; Nigeria ; Lagos Lagoon ; Callinectes amnicola ; Specificity ; Lagoon ; Condition factor ; Sex ratio ; freshwater environment ; automation
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    The identity of Schilbe intermedius in Jebba Lake, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24630 | 19325 | 2018-05-22 06:31:54 | 24630 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study attempts to ascertain the identity of Schilbe intermedius (Family: Schilbeidae) in Jebba Lake using quantitative (mophometric and meristic) and qualitative (colour and shape) parameters that makes identification easier. One hundred (100) specimens were collected and used for the study. There was relationship between body weight and length of fish (a=0.039, b=2.332, r=5.96). The parameters are similar to description of other authors. There is also absence of adipose fin found in the species, which is due to the geographical location.
    Description: Includes: 14 references.
    Keywords: Ecology ; Fisheries ; Schilbe ; intermedius ; Nigeria ; Jebba Lake ; Morphometric ; Meristic ; Butterffish ; Jebba Lake ; freshwater environment ; automation
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    Format: 256-259
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  • 156
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    Current trends of fish processing in Jabi Lake area (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24672 | 19325 | 2018-05-23 07:47:49 | 24672 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A survey of the fish processing practices of the fishing settlement around Jabi lake area in the Federal Capital Territory (FCT) was conducted. The main purpose of constructing the reservoir is to serve as the main source of water supply to the FCT, fishing and fish processing became prominent. Fishermen are recording very low fish catch and the level of hygiene in fish handling practices is very low. The processors are majorly involved in smoking and frying which is dominated by 79% of middle aged young men whereas, 21% are women. The scale of fish processing in Jabi Lake area is still at the subsistence level. Furthermore, the processors do not package the processed fish products, rather they gather them in baskets and plastic bowls. FCT resideents usually procurelive and smoked fish from Kado fish market.
    Keywords: Fisheries ; Nigeria ; Jabi Lake ; Fish processors ; Livelihood and fish processing ; freshwater environment ; automation
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    Format: application/pdf
    Format: 428-429
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  • 157
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    Effects of spices on the chemical properties of hot-smoked catfish (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24673 | 19325 | 2018-05-24 09:33:52 | 24673 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Effect of spices on the chemical properties of hot-smoked catfish (C.gariepinus) was examined. The experimental design was complete randomized design (CRD) with the treatments been the variously spiced hot-smoked catfish (garlic, ginger, garlic-ginger homogenate spiced and the control without spices). Proximate and mineral content analyses were carried out using standard experimental procedures. There exist significant differences (p〈0.05) in the percentage moisture and crude protein content with smoked catfish without spices having the highest moisture content with mean value 6.18 ~c 0.13 and 79.44 ~c 0.13 respectively which could be as a result of the increase in the fibre content of the spiced fish products which is a function of fibre content of the spices applied to the fish products. Similar trend was also observed for the lipid and ash contents the fish products. There exist significant differences (p〈0.05) in the mineral content preseent in the various fish products with the exception of magnesium. The products are rich in calcium and other minerals with garlic-ginger homogenate spiced product having the highest level of calcium (0.980 ~c 0.02).
    Description: Includes: 25 references.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Spices ; Organoleptic properties ; Chemical properties ; Hot-smoked ; C. gariepinus ; freshwater environment ; automation
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    Format: 435-438
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    Modification of NIFFR multipurpose smoking kiln with insulation (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24669 | 19325 | 2018-05-23 07:44:23 | 24669 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on the old NIFFR smoking kiln in order to improve on it. The parameters used to determine the smoking efficiency include the loss in weight of the fish samples, temperature and the time taken to properly smoke the fish using fire wood as smoking fuel. The smoking kiln was tested by smoking three different species of fish: Clarias gariepinus, Oreochromies niloticus, Synodontis membranecious over a period of two hours. The modified smoking kiln was discovered to perform faster. Its advantage over the already existing one is that it is faster in smoking fish to a regular golden brown colour. The temperature of the heat supplied was quite higher about 100~'C to 120~'C than the commonly used drum oven. The smoking kiln has the average oroduction cost of No.90,000.
    Description: Includes: 9 references.
    Keywords: Fisheries ; Nigeria ; Fish ; Wire mesh tray ; Mild steel ; Chimnet ; Damper plate ; freshwater environment ; automation
    Repository Name: AquaDocs
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  • 159
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    Yemaya, No.58, December 2018 (2021)
    International Collective in Support of Fishworkers (ICSF) | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/26120 | 25 | 2019-01-08 15:14:15 | 26120 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-24
    Description: Yemaya No. 58, dated December 2018, features articles from Kenya, Mexico, India, and an analytical article on gender inequalities in the seafood industry. The editorial comment calls for gender mainstreaming throughout the fisheries sector. The article on Kenya by Irene Ojuok and Philemon Bwanawoy throws light on the new initiatives developing in the context of declining resources in Kenya. Women are entering in new roles along the value chain and they no longer have to engage in jaboya thanks to new income-generating projects. Carmen Pedroza Gutierrez in her article narrates the experience of Alejandra and Maria Elena from Mexico's Lake Chapala and examines how women fishers are excluded from the support net of social security measures or benefits and how vulnerable their life is without any legal recognition. The article from India by Holly Hapke looks at how the mechanization in fishing and retrieving catch using mechanical propulsion led to greater centralization of fish landings and the impact on women fish traders. The centralization of landings has created competition from men fish traders too. Marie Christine Monfort in her article on survey among male and female seafood professionals to express their view about the situation of women in the fishing industry aregue that situations of inequality have bben reported from all parts of the world with the exception of Scandinavia. The seafood professionals from this region rank Denmark, Iceland and Norway at top countries closest to gender equality. In her review of the Cambodian film, Give Woman a Fish, Kyoko Kusakabe describes the challenges women fishers face in Cambodia’s Tonle Sap Lake. The lake supports the 60% of Cambodia’s annual fish catch and livelihood to 1.5 mn people. The film describes how a successful project supported by a women’s group to upgrade their fish processing techniques, introduced savings and helped to diversify livelihoods. A profile of Sonia Medina Matarrita, fisherwoman from Isla Venado, Costa Rica by Vivienne Solis Rivers narrates the story of how under Sonia’s leadership, the Venado Island fishers association got involved in the implementation of responsible fishing in the Marine Responsible Fishing Area of the island. The Milestones column presents the urgent need to guarantee the social protection and safety of workers (women and men) in the sector. The declaration calls our attention to provide professional dignity to fishers’ activity so that it can be considered "decent work", according to the ILO definition. The declaration states that it is necessary to improve the working conditions of women within the sector, fighting against the informality and precariousness of women's work, segregation both horizontally and vertically, the wage gap and barriers that hinder the reconciliation of work, family and personal life. The What's New, Webby? column presents the details of a new women in fisheries project which examines how women contribute to the survival of both fishing families and the fishing industry. The current issue of the Newsletter also carries the ever-popular cartoon strip, Yemaya Mama, reading between the lines. .. Yemaya No. 58, December 2018, can be accessed at: https://www.icsf.net/en/yemaya/article/EN/58.html?limitstart=0
    Keywords: Fisheries ; Yemaya ; India ; Women in fisheries ; fish markets ; fish vendors ; livelihoods ; food security ; small-scale fisheries ; fish landings ; Kenya ; Lake Victoria ; women fish traders ; Costa Rica ; fisherwomen ; Gender ; Seafood industry ; inequalities ; aquaculture ; Santiago Declaration ; Mexico ; fishing communities ; lake fisheries ; website ; Cambodia ; Tonle Sap Lake ; livelihoods ; fish processing ; poverty ; small scale fisheries ; ICSF
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    SAMUDRA Report No.72, January 2016 (2021)
    International Collective in Support of Fishworkers | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/20421 | 25 | 2016-03-30 06:52:35 | 20421 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-10
    Keywords: Aquaculture ; Conservation ; Fisheries ; ICSF ; Samudra Report ; Uganda ; HIV ; Reports ; Pacific Islands ; Slavery ; Cambodia ; fishing communities ; Brazil ; VGSSF ; small scale fisheries ; artisanal fishing ; Indonesia ; Sustainable fisheries
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
    Format: 56
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    SAMUDRA Report No.74, August 2016 (2021)
    International Collective in Support of Fishworkers | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/21161 | 25 | 2017-03-16 10:24:44 | 21161 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-14
    Keywords: Aquaculture ; Environment ; Fisheries ; ICSF ; journal ; Samudra report
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 64
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  • 162
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    The small scale fishing experience of the Garifuna community in Nueva Armenia, Honduras (2021)
    The International Collective in Support of Fishworkers | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/21205 | 25 | 2017-03-21 10:39:57 | 21205 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-14
    Description: The case is part of the series of studies undertaken in Central America to document the experience of Artisanal Fisheries. This case study in Honduras, specifically focuses on the impact of climate change on the Garifuna community, and identifies the limitations and strengths of Garifuna community in terms of access and use rights to coastal marine resources. It documents the participation of women in the difference processes from capture to product marketing. It also focuses on the current situation of the community in terms of their basic living conditions.
    Keywords: Fisheries ; Garifuna ; Nueva Armenia ; Honduras ; small scale fishing ; fishing communities ; case study ; artisanal fisheries ; living conditions ; women ; climate change ; impact ; marine fisheries ; coastal resources
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    Report on workshop on enhancing capacities of women fishworkers in India for the implementation of the SSF guidelines, 21–23 November, 2016, Ashoka Hall, Asha Nivas Social Service Centre, Chennai, India (2021)
    The International Collective in Support of Fishworkers | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/21213 | 25 | 2017-04-03 10:42:02 | 21213 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-14
    Description: The International Collective in Support of Fishworkers (ICSF) Trust organised a national workshop on ‘Enhancing capacities of women fishworkers in India for the implementation of the SSF Guidelines’ in Chennai, India, on November 21-23, 2016. There were 63 participants from nine coastal states of India—participants from Gujarat could not attend. They were informed of the situation and role of women in India’s fisheries, as also the relevance of the ‘Voluntary Guidelines for Securing Sustainable Small-scale Fisheries in the Context of Food Security and Poverty Eradication’ (SSF Guidelines) to women in small-scale fisheries and the opportunities to improve their conditions. This report of the workshop provides the various discussions that were held during the three days. Apart from participants sharing their experiences on all the issues, the challenges they faced, and their struggles and successes to overcome these, resource persons provided information on the legal frameworks and schemes at the national and state levels, as also the mechanisms to access these to help women in small-scale fisheries to promote their interests and protect their rights.
    Keywords: Fisheries ; Sociology ; ICSF ; WIF ; women ; fishing communities ; India ; SSF guidelines ; VGSSF ; smale scale fisheries ; capacity building ; fishworkers ; reports ; food security ; poverty ; FAO
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    Conte Burica: An indigenous people that listens to the Sea. Ngabe People. First approach. (2021)
    The International Collective in Support of Fishworkers | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/21206 | 25 | 2017-03-21 10:43:09 | 21206 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-14
    Description: This study is part of the regional process of understanding the importance of traditional knowledge in Latin America. The study identifies the key developments in indigenous peoples issues in Costa Rica, especially relating to fishing communities. It also documents the perceptions of the leaders of the Council of Elders in relation to fisheries issues, craft, access to land and sea, marine conservation and climate change and social aspects along with gender equality. The study is specific to the marine areas of the Conte Burica region.
    Keywords: Fisheries ; Latin America ; traditional knowledge ; indigenous people ; Costa Rica ; fishing communities ; conservation ; Conteburica ; marine fisheries ; case study ; ICSF ; CoopeSoliDar
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  • 165
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    Analysis of activity concentrations due to natural radionuclides in the fish of Kainji Lake (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24242 | 19325 | 2018-05-20 05:37:02 | 24242 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted for natural radioactivity of some fish samples from Kainji Lake, situated between latitudes 9~' 50' - 10~' 57' North and longitudes 4~'25'-4~'45' East, New Bussa, Niger state, Nigeria, using gamma spectroscopy method with Nal(TI) detector. Radioactivity a phenomenon that leads to production of radiations, and radiation is known to trigger or induce cancer. The fish are analyzed to estimate the radioactivity (activity) concentrations due to natural radionuclides (Radium 222(226Ra), Thorium 232(232Th) and Potassium 40 (40K). The obtained result shows that the activity concentration for (226Ra), in all the fish samples collected ranges from 16.06 ~c 0.44 Bqkg-1 to 67.39 ~c 12.34 Bqkg-1 with an average value of 37.22 ~c 4.31 Bqkg-1. That of 232Th, ranges from 42.66 ~c 0.81 Bqkg-1 to 200.6 ~c 10.66 Bqkg-1 and the average value stands at 94.82 ~c 3.82 Bqkg-1. The activity concentration for 40K, ranges between 243.3 ~c 1.56 Bqkg-1 to 384.98 ~c 11.97 Bqkg-1 and the average is 618.2 ~c 26.81 Bqkg-1. This indicated that average daily intake due to natural activity from the fish is valued at 0.999 Bq/day, 2.545Bq/day and 10.31 Bq/day for 226Ra, 232Th and 40K respectively. This shows a promising result, since the activity concentration values for most of the fish are within the acceptable limits. However location Upstream02 (9~'51'.285~AN, 4~'35'.533~AE) and Upstream07 (9~'51'.285~AN, 4~'35'.533~AE) fish, became outliers with significant values of 1 13.10~kSvy-1 and 121.68~kSvy-1 effective dose. This could be attributed to variation in geological formations in the lake as well as the feeding habits of these fish. The work shows that consumers of fish from Kainji Lake have no risk of radioactivity ingestion, even though no amount of radiation is assumed to be totally safe.
    Description: Includes: 16 references.
    Keywords: Environment ; Fisheries ; Nigeria ; Kainji L. ; Radioactivity ; Dose ; Radionuclides ; freshwater environment ; Radioisotopes ; Freshwater fish ; Radiation hazards ; Radioactive contamination ; Geological hazards ; Lake fisheries ; Feeding behaviour ; Health and safety ; Toxicants ; Radioactivity ; Bioaccumulation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
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    Acute toxicity of 2, 3-dichlorovinyl dimethyl phosphate (Sniper 1000EC) and response of Clarias gariepinus Burchell under laboratory conditions (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24215 | 19325 | 2018-05-19 06:53:11 | 24215 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study investigated the acute toxicity of 2, 3-dicholrovinyl dimethyl phosphate (Sniper 1000EC) on the African mud catfish, Clarias gariepinus juveniles (mean weight 19.47 ~c 1.05g) using static bioassay method. Sniper 1000EC is an organophosphate pesticide. Each treatment in the acute test was in triplicate with bioassay media concentration of 0,5, 10, 15 and 20 mg/l. Data on mortalities of fish, water physic-chemical parameters as well as changes in haematological indices were subjected to one way analysis of variance (ANOVA) at 5% probability level. Duncan multiple range test was used to separate differences between the means. The 96hr LC50 estimated by probit analysis during the exposure was found to be 8.20mg/l. Behavioural abnormalities of the exposed fish included erratic and uncoordinated swimming and bleached skin with lesion at the highest concentration (20mg/l). Blood dyscrasias attributable to the toxicant was observed with a significant (p〈0.05) decrease in haemoglobin, haematocrit, red blood cells, white blood cells, lymphocytes and monocytes. Mean corpuscular volume (MCV), Mean corpuscular haemoglobin (MCH), neutrophils, eosinophil and basophil increased significantly (p〈0.05) with increasing concentrations of the toxicant. These abnormalities in body and blood parameters as a result of exposure to the toxicant make the study to recommend that the use of Sniper 1000EC by local fishermen be banned to preserve aquatic lives in Nigerian inland water bodies.
    Description: Includes: 22 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Niger State ; Sniper 1000EC ; Clarias gariepinus ; Toxicity ; Haematological indeces ; freshwater environment ; Toxicity ; Phosphate deposits ; Response analysis ; Freshwater fish ; Juveniles ; Bioassays ; Toxicity tests ; Physicochemical properties ; Controlled conditions ; Haematology ; Pollution monitoring
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    The effects of heavy metals concentration in some commercial fish in Ogun River, Opeji, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24219 | 19325 | 2018-05-19 07:00:18 | 24219 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on commercially important fish species of heavy metals in water bodies, The primary objectives were to find out the amount of heavy metals concentration in the fish species, sediments and water samples at the deep and shallow part of the river, to determine the toxicity and relationship between the collected samples and the rate at which it pollutes the water. Atomic Absorption Spectrophotometer (AAS) evaluate their wholesomeness for human consumption. Four heavy metals (Lead, Cadmium, Copper and Zinc) were analysed and only Copper and Zinc were found to be present in the digested samples. The concentration of Copper in the fish (flesh) is 0.09mg/l and that of Zinc is 0.25mg/l. In the bone samples, Copper was found to have 0.17mg/l and Zinc to be 0.22mg/l. In the water samples analyzed, the concentration of Copper is 0.035mg/1 while that of Zinc is 0.047mg/l. In the sediment sample, the amount of Copper is 310.0mg/kg while that of Zinc is 20.50.0mg/kg. This however signifies that the fish species in the Ogun River as well as the water is suitable for consumption which was found to be less than the World Health Organization (WHO's) maximum recommended acceptable limits in the food.
    Description: Includes: 7 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Ogun R. ; freshwater environment ; Heavy metals ; Pollution effects ; Freshwater fish ; Fisheries ; Toxicity ; Pollutants ; Quality assurance ; Commercial species ; Sediment pollution ; Water analysis ; Lead ; Cadmium ; Copper ; Zinc ; Freshwater pollution ; Health and safety
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  • 168
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    Indicative fish catch of Brass River area (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24230 | 19325 | 2018-05-19 07:21:55 | 24230 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A 14-day quick appraisal fisheries survey of the Brass River area was conducted from 8th-21st June 2005 to collect information on fish species, fish catch and fishing craft. Total fish catch was estimated to be 11,086.12kg. Out of a total of 15 families and 43 species caught in the area, the Sciaenidae (Pseudotolithus typus, P.elongatus, P.senegalenensis) contributed 37%, the Polynemidae (Polydactylus quadrifilis) 26%, and Bagridae (Chrysichtyes nigrodigitatus) accounted for 17% of the total fish landings. The landings at the Coastal Marine Waters were about 66 % while the catch from gill nets constituted 68% of the total fish landings, followed by traps with 15%, hooks and lines landed 11 % while seine nets and cast nets contributed 5% and 1 % respectively to total fish landings. Four types of crafts were used in the Brass River Fisheries including the Ghana boat, plank boat (with or without engine), fiberglass speed boat and the dug-out canoe. In view of high industrial and commercial activities and especially threats from oil and gas pollution, it is recommended that the fisheries of the Brass area be properly investigated.
    Description: Includes: 5 references.
    Keywords: Fisheries ; Pseudotolithus typus ; Pseudotolithus elongatus ; Pseudotolithus senegalensis ; Polydactylus quadrifilis ; Chrysichtyes nigrodigitatus ; Nigeria ; Brass River ; Brass river ; Fisheries survey ; Fish catch ; Fishing crafts ; Fishing gear ; brackishwater environment ; Fishery surveys ; Evaluation ; Fish catch statistics ; Fishing vessels ; Fishing gear ; Landing statistics ; River fisheries
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  • 169
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    Microbial load on the African catfish (Clarias gariepinus) sold in Markurdi metropolis: a case study of selected markets (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24069 | 19325 | 2018-05-10 10:21:32 | 24069 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The work was carried out using 48 samples of smoke-dried African catfish (Clarias gariepinus). Twelve samples each were obtained from high level market, Wadata market, Wurukum Market and North bank market respectively. Different media (SDA, MSA, EMBA, N.A, MCA), gram reaction and biochemical tests were carried out to confirm the presence of the pathogenic bacteria. There was a strong correlation between the bacterial count and water activity of the fish for all bacterial isolates. The micro-organisms isolated were Aspergilus niger, Mucor spp, Salmonella spp, Escherichia coli and Staphylococcus aureus which were indications of contamination from surrounding environment.
    Description: Includes: 5 tables and 4 figs.;Also includes: 16 refs.
    Keywords: Fisheries ; Health ; Clarias gariepinus ; Nigeria ; African catfish ; Bacterial load ; Makurdi ; Mycoflora ; Smoke-dried fish ; freshwater environment ; Microorganisms ; Cured products ; Fish ; Pathogens ; Biochemical analysis ; Processing fishery products ; Storage life
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  • 170
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    Fish: the healthy friendly species (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24070 | 19325 | 2018-05-12 13:51:23 | 24070 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish is a very important part of a healthy diet. Fish and other seafood are the major sources of healthful long-chain omega-3 fats and they are also rich in other nutrients such as vitamin D and selenium, protein, and low in saturated fat. There is strong evidence that eating fish or taking fish oil is good for the heart and blood vessels. Research over the past few decades has confirmed the importance of the nutritional components of fish in brain development and reproduction and highlighted a role for fish in a variety of other functions in the body. Much of the importance of fish in health has come from research into long chain polyunsaturated fatty acids (PUFA) of the n-3 family. The n-3 Fats are also generally known as omega 3 fats. Fish is a rich source of two important n-3 PUFAs, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DBA). Marine algae are the only form of life that can easily make long chain n-3 PUFA. As fish feed on algae, they become rich sources of these important n-3 fats which in turn transfer to humans through consumption of the former. In addition, fish is also a good source of iodine, zinc vitamins A and some B vitamins. Fish intake has bee on decline for many years based on different food consumption survey with alarming findings that some people never eating fish without any taboo attached. The level of fish intake has been linked with a lower risk of death from heart disease and likewise playing vital roles in preventing other illnesses such as arthritis, strokes, breast cancer, diabetes to mention a few. However, it is recommended by various finding that eating fish at least twice a week and including oil- rich fish at least once a week in diet will maintain healthy conditions against illnesses.
    Description: Includes: 3 tables;Also includes: 50 refs.
    Keywords: Fisheries ; Nigria ; Fish ; Healthy ; Friendly ; Species ; freshwater environment ; Fish ; Fish oils ; Heart ; Nutrition ; Nutritive value ; Vitamins ; Fatty acids ; Heavy metals ; Pollutants
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  • 171
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    The concept of Adopted Villages and Agricultural Research Outreach Centres -implications for fisheries development in Nigeria: a review (2021)
    FISON | Minna (NIgeria)
    In:  http://aquaticcommons.org/id/eprint/24073 | 19325 | 2018-05-12 13:58:14 | 24073 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Adopted village/Agricultural Research Outreach Centres (AROC) initiative is specifically conceived by the Federal Government of Nigeria in order to avoid the weaknesses and shortcomings of the conventional method of technology transfer to the farmers through the extension staff of the Agricultural Development Projects. This paper examined the relevance of the concept in the development of the fisheries sector. Methods and guidelines adapted so far and modalities for actualization of targeted aims and objectives were also examined. The economic importance of fish to the economy of Nigeria was highlighted. Recommendations were given as way forward for the success of the project and its continuity.
    Description: Includes: 16 refs.
    Keywords: Fisheries ; Aquaculture ; Nigeria ; freshwater environment ; Agriculture ; Research programmes ; Technology transfer ; Development projects ; Extension activities ; Fisheries ; Fishery economics
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  • 172
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    Assessment of smoked fish packaging in Doron-Baga metropolis, Borno State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24074 | 19325 | 2018-05-12 13:59:45 | 24074 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study examined how smoked fish are being packaged in Doran-Baga metropolis. A random sampling technique was used purposely to select one hundred and fifty respondents who are currently involve in smoked fish packaging. Data were collected by means of structured questionnaire. Data collected were analyzed using percentages and frequency. Results revealed that smoked fish packaging is predominantly traditional in the study area. Modern method of smoked fish packaging is nearly absent when compared to smoked fisheries resources produced and packaged from the area
    Description: Includes: 3 tables;Also includes: 8 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Borno ; Chad L. ; freshwater environment ; Cured products ; Packing fishery products ; Evaluation ; Processing fishery products ; Packing materials
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  • 173
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    Design and construction of a simple boat trailer for Federal College of Freshwater Fisheries Technology, New Bussa (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24080 | 19325 | 2018-05-12 14:12:55 | 24080 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A simple boat trailer with an overall length of 4.59m, breathes 1.68m, and weight of 87kg was designed and constructed using locally available metals and scrap materials. The boat trailer was used to tow a boat of 250kg weight through a distance of 14km without affecting the safety and speed of the car. The construction resulted to the production of an open cart that is light and easily maneuvered that one person can move it manually without difficulty. The total production cost was N32, 300 which is affordable in relation to the cost of transporting boats through the use of pick up vans. The boat trailer can be easily maneuvered when coupled to any car or van. This makes it adequate for towing and for safer movement of boats from the school boat yard to any water bodies.
    Description: Includes: 2 tables, 2 figures and 3 plates;Also includes: 5 refs.
    Keywords: Fisheries ; Nigeria ; Boat ; Towing ; Construction ; freshwater environment ; Boats ; Construction ; Construction materials ; Metals ; Towing tanks ; Safety devices
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  • 174
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    Design and construction of 4.27M (LOA) rowing transport boat (punt) for inland water bodies (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24079 | 19325 | 2018-05-16 14:02:23 | 24079 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Flat bottom boat (Rowing Punt) 4.27M length overall (LOA) was designed and constructed using plywood and fiber glass materials. The boat posses features like easy construction stability and high capacity to carry load. Other features include least cost light weight, shallow draft of 9cm easy maneuverability. The light displacement (weight empty) is 96.6kg which is similar to local boat of same size. The capacity of the boat 544kg (8 person) and total cost of production was N41,150.00 which is not beyond the reach of an average fisherman. The Rowing Punt easily propelled by oaring which makes it adequate for fishing activities on shallow water bodies. Such easily maneuvered craft can also be used for recreation which include, sport fishing, and boating.
    Description: Includes: 3 tables, 2 figs., and 2 plates;Also includes: 6 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Fishing vessels ; Sport fishing ; Transportation ; Marine transportation ; Fishermen ; Construction ; Construction materials ; Fibre glass ; Stability
    Repository Name: AquaDocs
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  • 175
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    Development of an improved dug canoe for artisanal fisheries (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24081 | 19325 | 2018-05-12 14:14:25 | 24081 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A dug canoe similar to the one commonly used by artisanal fisherfolks 4.82M (LOA) was designed and constructed using locally available materials, as an alternative to hardwood that is becoming very scarce. The canoe have least cost, easy construction, adequate stability, light weight and easy maneuverability, as its attributes. The light displacement (weight empty) was 37kg which is light enough in relation to craft of same size commonly used by fishermen. The capacity of the canoe was 210 kg (3 persons) and total production cost of N18,400 which is not beyond the reach of an average fisherfolk. The craft is small and fall among the category of crafts that account for the greater percentage of national fish landing. The canoe also closely resembles the local fishing crafts, hence easy acceptance by local fisherfolk.
    Description: Includes: 3 tables, 2 figures and 2 plates;Also includes: 8 refs.
    Keywords: Fisheries ; Nigeria ; Canoe ; Plywood ; Hardwood ; alternative ; freshwater environment ; Artisanal fishing ; Canoe fisheries ; Canoes ; Construction ; Construction materials ; Marine transportation ; Design
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  • 176
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    Evaluation of fish biodiversity integrity of Ebonyi River (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24083 | 19325 | 2018-05-12 14:17:44 | 24083 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study of the fish biodiversity integrity of Ebonyi River was conducted from September 2006 to February 2008 to generate fundamental data needed in Fisheries policy formulations and to assess the potential of the Fishery in enhancing quality food protein production. A total number of 1,080 fishes (comprising Fin-fish and shell-fish) were caught with hooks and lines of size 13, cast nets, gill nets and traps of mesh sizes of 50mm, 75mm and 100mm and identified using taxonomic keys. There were 39 species belonging to 20 genera and 14 families. Percentage gear catch composition was 43.6%,23.8%,17.7% and 15.3%for cast nets, gillnets, hooks and traps respectively. Zooplankton samples were also collected identified and analyzed using standard plankton analysis protocol. Cladocerans, rotifers, copepods and protozoans were represented in the identified species. Analysis of Variance (ANOVA) was used to determine the overall significance of the monthly means of all parameters and in locations and also to establish their correlation characteristics. Fisher's Least Significant Difference (F-LSD) was used to separate the means and to rank them. Family Amphilidae and Malapteruridae were not significant (p~B0.05) in monthly occurrence. Family Bagridae, Cichlidae and Clariidae showed highly significant (p〈0. 01) monthly differences while the remaining fish families exhibited significant (p〈0.05) differences in months. It was observed that artisanal fisherfolks used fishing gears whose mesh sizes deplete juvenile fish. It was concluded that there is an urgent need for improved management strategies to enhance sustainable productivity of the inland river system.
    Description: Includes: 3 tables;Also includes: 12 refs.
    Keywords: Fisheries ; Ecology ; Nigeria ; Ebonyi R. ; freshwater environment ; Fish ; Biodiversity ; Fishery policy ; Aquatic environment ; Inland fisheries ; Zooplankton ; Fishing gear ; Evaluation ; Fishermen ; Juveniles ; Depletion ; Ecology ; Stock assessment
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  • 177
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    Fishing gear survey of Tatabu floodplain (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24084 | 19325 | 2018-05-12 14:19:12 | 24084 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was carried out for a period of three months from June to August, 2008. Five fishing villages namely Tatabu, Tsafa, Tunga Fulani, Tunga Sarkin ruwa and Lafiagi were used as study area by administering a total of 50 questionnaires (I.R. 10 questionnaires in each village). The study was conducted to assess the type of fishing gear mostly used by the fishermen in Tatabu floodplain. The greatest proportion (98%) of the fishermen interviewed were within age bracket 25-35 years. Majority of the respondents were Muslims and married form the highest percentage (60%). Three types of fishing gears, gillnet, long line and Malian Trap were used. The fishermen using gillnets had the highest percentage (44.2%) and those using Malian traps were the lowest percentage (23%). the fishermen using mesh size 50.8mm were highest (38.7%) and those are using mesh size of 101.6mmformed the lowest percentage (6.5%). The fishery crafts, 38% of fishermen use 4.3 meters length overall (LOA) and fishermen using 5.5 meters formed the lowest percentage (6%). Most of the respondents (88%) realized about N100-900 as daily income while 12% obtained more than N900 as daily income (54%) of the respondent. The problems militating against successful fishing activities includes lack of provision of social amenities, provision of loan and procurement of fishing inputs at subsidized rate.
    Description: Includes: 9 tables;Also includes: 9 refs.
    Keywords: Fisheries ; Nigeria ; Tatabu Floodplains ; freshwater environment ; Fishing gear ; Surveys ; Flood plains ; Artisanal fishing ; Fishermen ; Seasonal variations
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    Proximate composition and sensory analysis of African catfish (Clarias gariepinus) harvested from different sources in Ondo State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24088 | 19325 | 2018-05-12 14:29:17 | 24088 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Proximate composition and sensory evaluation of Africa catfish Clarias gariepinus harvested from earthen ponds, reservoir system, tank flow - through system and Flow Rivers were determined. Chemical assessment was based on the method of analysis of the Association of Official Analysis (AOAC). The samples collected shows moisture content 71.71~c1.65%, 74.20~c1.39, 73.60~c2.3% and 72.29~c68% from earthen ponds, reservoirs, and tank flow- through system and rivers respectively. The crude protein 9.77~c2.66%, 20.99~c0.68, 19.80~c0.53% and 18.84~c1.00% from earthen ponds, reservoir system, tank flow- through system and rivers respectively. There was no significant difference (p〉0.05) among the means recorded and the locations where the fish samples were collected has no effect on the value of the moisture and the crude protein content of the fish samples when compared. Crude fat contents 5. 68~c0. 81 %, 4.95~c0.38%, 3.85~c0.56% and 1.35~c0. 29%from reservoir system, low through system, earthen ponds, and rivers respectively. Ash content of the fish samples were 1.52~c0.40%, 1.49~c0.40%, 2.23~c0.91 % and 1.47~c0. 60% from earthen ponds, reservoir system, tank flow- through system and rivers respectively. There was a significant difference (p 〈0.05) among the means of the crude fat contents and ash contents. The location where the fish samples were collected influenced the means of the ash content and the crude fat contents. The taste, odour, appearance and texture were the indices for the evaluation. Fish from rivers were most preferred followed by earthen ponds, reservoirs system and tank flow- through system respectively.
    Description: Includes: 4 tables and 1 figure;Also includes: 15 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Ondo State ; Reservoir ; Tank flow-through ; River ; Earthen pond ; freshwater environment ; Aquaculture ; Chemical composition ; Fish ; Sense organs ; Evaluation ; Water content ; Lipids
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  • 179
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    The length-weight relationships of two Siluriformes in Owalla and Eko-Ende Reservoir of Osun State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24087 | 19325 | 2018-05-12 14:24:52 | 24087 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The length - weight relationships of two siluri formes Chrysichthys nigrodigitatus and Schilbe intermedius -from Owalla and Eko - Ende reservoirs were studied to provide useful information for the sustainable development of their fisheries. Length - weight data were analyzed, and LWR graphs were plotted using the sigma plot software. The b values in the LWR W = aLb varied between 3.01 and 3.58, revealing that the somatic growth of C. nigrodigitatus from Eko - Ende and that of Schilbe intermedius from both reservoirs had positive allometry, while C. nigrodigitatus from Owalla reservoir had an isometric growth. The maintenance of the ecological balance in the reservoirs will guarantee sustainable fisheries for these siluriformes.
    Description: Includes: 1 table and 2 figures;Also includes: 13 refs.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Schilbe intermedius ; Nigeria ; Owalla reservoir ; Nigeria ; Eko-Ende reservoir ; freshwater environment ; Length-weight relationships ; Fish ; Reservoir fisheries ; Sustainable development ; Mutations
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  • 180
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    Gonadosomatic index, fecundity and egg size of (Synodontis) S. eupterus (Boulenger) in River Rima, north western Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24089 | 19325 | 2018-05-12 14:34:56 | 24089 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to provide information on gonadosomatic index, fecundity and egg size on S. eupterus from River Rima, North-Western Nigeria, from November 2005 and December 2008. 1,610 samples, comprising of 781 females, 816 males and 13 samples whose sexes could not be identified were examined, giving a female: male ratio of almost 1:1. Gonadosomatic index (GSI), fecundity (F) and diameter of the oocytes (ES) were analysed. Linear regression analysis was used to determine the relationship between GSI, fecundity and egg size with total length (TL), total weight (TW), gonad weight (GW) and gonad maturation stages (MS). Six stages of gonad maturation were established. Mean GSI for female and males were 7.30 0~c6.16SD and 1.05~c1.23SD, respectively. It varied (P〈 0.05) with sex, size class and gonad maturation stage, and exhibited significant (P〈0.05) correlation with fish TL, TW and MS in females but not (P〉0.05) in males. Mean fecundity was 2834.45~c2530.87SD and it correlated most significantly (P〈0.05) with GW; and inversely with MS. Mean egg size was 1.31~c0.33mm. It has non significant (P〉0.05) relationship with TL, TW and MS but significant one (P〈0.05) with GW. Egg size distribution was bimodal, with different sizes of egg in ovaries indicating multiple spawning. This study provided baseline information on some aspects of reproduction which is important in the management of A. occidentalis in River Rima.
    Description: Includes: 4 tables and 2 figures;Also includes: 25 refs.
    Keywords: Ecology ; Fisheries ; S. eupterus ; A. occidentalis ; Nigeria ; Rima R. ; Gonadosomatic index ; fecundity ; oocyte diameter ; gonad maturation stage ; S.eupterus ; freshwater environment ; Gonadosomatic index ; Fecundity ; Fish eggs ; Size ; Reproduction ; Fish ; Spawning ; Frequency ; Oocytes
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    Microbial occurrence on differently preserved tilapia fish in Abeokuta North Local Government, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24094 | 19325 | 2018-05-16 13:01:01 | 24094 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study reports the microbial flora of differently processed tilapia fish obtained from Olomoore market, Abeokuta, Nigeria. Samples were purchased, differently processed (using smoking, salting, freezing) and analyzed for the presence of bacteria. Microbial loads and characterisation were examined on the gills and the skin using standard microbiological procedures. The progression of growth was also monitored within I0-day storage period for the differently processed fish. 〈i〉Proteus vulgaris, Leuconostoc meseritiroides, Klebsiella planticola〈/i〉, Pseudomonas spp, 〈i〉Staphylococcus aureus, Bacillus subtitles〈/i〉, Enterobacter spp, 〈i〉Proteus vulgaris〈/i〉, Lactobacillus spp. were the bacteria isolated from the differently processed fish. There was no significant difference (P~B 0. 05) in the bacteria load of the gill during the first day of processing. However, significant variation (P~B 0. 05) existed in the bacteria load of the skin of the fish during the first day of processing. Although no significant difference (P~B 0. 05) was recorded in the bacteria load of the gill and the skin of the fish during the first day of processing in nutrient agar medium. In the tenth day frozen fish gill had the highest bacteria load while smoked fish gill had the lowest bacteria load there was significant difference (P~B 0. 05) in the bacteria load on the gill of differently processed fish gill. Similarly, there was significant variation (P~0.05) in the bacteria load of the skin of the fish during the tenth day processing.
    Description: Includes: 3 tables;Also includes: 29 refs.
    Keywords: Fisheries ; Proteus vulgaris ; Leuconostoc meseritiroides ; Klebsiella planticola ; Staphylocoooccus aureus ; Bacillus subtilis ; Nigeria ; Bacteria ; Microbial ; Occurrence ; Tilapia ; Smoking ; Salting ; Boiling ; freshwater environment ; Microorganisms ; Fishery products ; Processing fishery products ; Fish ; Gills ; Fish diseases ; Skin ; Bacterial diseases ; Pathogens
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    Potentials of Prosopis africana for fish smoking in Lake Chad Basin: a review (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24098 | 19325 | 2018-05-16 13:09:44 | 24098 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper examines the importance of Prosopis Africana as the most abundant tree in Baga and environs. Despite its abundance fish processors prefer the other trees that are almost becoming scarce especially Acacia Nolitica for fish smoking. There is need for awareness to adapt the use of Prosopis Africana for environmental sustainability and preservation of other trees not to go into extinction.
    Description: Includes: 2 plates;Also incudes: 12 refs.
    Keywords: Fisheries ; Law ; Nigeria ; Chad L. ; Smoking kiln ; freshwater environment ; Curing ; Fish ; Processing fishery products ; Deforestation ; Environmental degradation ; Wood ; Sustainability ; Sustainable development
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  • 183
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    Global warming: implications on freshwater fish, a review (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24099 | 19325 | 2018-05-16 13:12:57 | 24099 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Global warning and climate change are growing environmental concerns which are much in the scientific, governmental and public eye are present. The potential impact on freshwater fish is immense because most fish have no physiological ability to regulate their body temperature.
    Description: Includes: 21 refs
    Keywords: Environment ; Fisheries ; Pollution ; Nigeria ; Global warming ; Climate change ; Freshwater fish ; freshwater environment ; Freshwater fish ; Spawning ; Biological stress ; Environmental impact ; Environmental assessment ; Body temperature ; Legislation ; Global warming ; Climatic changes
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  • 184
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    Some ecological factors of the tropical floodplain influencing the breeding and conservation of Gymnarchus niloticus (Cuvier 1829): a review (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24096 | 19325 | 2018-05-16 14:04:57 | 24096 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Gymnarchus niloticus is the only species of the family Gymnarchidae. It is a popular food fish in most parts of Africa where it is greatly esteemed. In some culture, it is offered as a special gift to leaders during festive seasons, while in some others it is an important part of items presented by a suitor to the parents of a girl at the time of betrothal. It can therefore be inferred that G. niloticus is not only important as food fish with economic significance, but also plays vital roles in the socio-cultural life of some African tribes. The supply of this important species still depends largely on the catch from the wild. However, based on the method of catch, it has been classified as endangered. A close examination of the ecological factors in the floodplain (where it migrates to breed), revealed strong influence on the breeding and survival of the fish. The level of rainfall determines the extent of floodplain inundation, and the abundance and survival of the flora and fauna in the area. These in turn determine the availability of breeding substrates and natural food sources for the various stages of G. niloticus. Therefore, rainfall, the flora and the fauna of the floodplain play vital roles in the breeding and survival of G. niloticus in nature. To ensure the conservation of this important species, controlled propagation strategies that draws on the influence of prevailing ecological factors in the floodplain is recommended. This will ensure conservation, and protect the economic and socio-cultural significance of G. niloticus.
    Description: Includes: 4 figures;Also includes: 36 refs.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Gymnarchus niloticus ; Nigeria ; Ecological factor ; Tropical floodplains ; Breeding ; Conservation ; Gymnarchus ; Tropical floodplains ; freshwater environment ; Flood plains ; Ecology ; Breeding ; Conservation ; Fish ; Food fish ; Commercial species ; Rare species ; Catch/effort ; Ecological distribution
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  • 185
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    Socio-economic status of the fisher folk of Yuna Adopted Village in Borgu local government area, Niger State (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24106 | 19325 | 2018-05-16 13:52:14 | 24106 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Overcoming Poverty in Nigeria is one of the fundamental challenges facing the country today. The study was conducted to assess the socio-economic status of fisher folks in Yuna Adopted Village Borgu Local Government Area of Niger State. One hundred respondents (65 male and 35 female) were purposively selected from four registered groups in the Village. Frequencies and Percentages were used to arrange, summarize and present the findings of this study. Majority of the male respondents fell within the range of 30-49 years, while female respondents range from 40-49 and 60-69 years. The distribution of respondents based on educational attainment shows that 92.3% male and 100% female had Quranic education. Majority of the respondents (both male and female) lives in mud with thatched roof houses and do not own radio and television. Similarly the highest proportion of male respondents generated mostly income of N111,000 and N6,000 - N10,000, while female respondents earned between Nll,000 - N30,000 and N6,000-N10,000 only. The technologies awareness by respondents include fish farming, V-bottom boat, Solar tent dryer and trammel net, only fish farming was adopted by respondents. The major constraints to Agricultural production were identified and suggestions was made on how to overcome the constraints.
    Description: Includes: 6 tables;Also includes: 12 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Awareness creation ; Technologies adoption ; Poverty ; Fishers ; Adopted Technologies ; freshwater environment ; Artisanal fishing ; Socioeconomic aspects ; Food security ; Sustainable development ; Inland fisheries ; Fishing villages ; Technology transfer
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  • 186
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    Stock assessment of shrimps and prawn species of the Lower Benue and Niger River, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24107 | 19325 | 2018-05-16 13:53:57 | 24107 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The shrimps were collected from three sampling sites: on the River Benue at Makurdi, Benue state, on the River Niger at Jebba and Lokoja and Idah at Kogi state from January to April, 2011. Macrobrachium felicinum and Atya gabonensis were sampled during this period, with Atya gabonensis occurring more abundantly. Condition factors of freshwater shrimps Atya gabonensis from the two water bodies in Nigeria range from 1.875for species in Jebba in March to 3.330 for Lokoja in March. The parameter ”b” of the length - weight relationship of the fresh water shrimps are less than three (rangingfrom 1.0233 for species from Lokoja in April to 2.7717 for species from Makurdi in Feburary). These values suggest negative allometric growth. The length frequency of freshwater shrimps sampled shows that peak populations of length groups occurred in April for species from Jebba and Makurdi while peaks occurred in January for species from Lokoja.Peak frequencies were observed in length of 4.0 - 5. 4cm and 8.5 - 9.9cm in January as well as 5.5 -6.9cm for species from Lokoja and in the group of 5.5 - 6.9cm in April for species from Makurdi and 7.0-8.4cm in April for both Makurdi and Jebba.
    Description: Includes: 2 tables;Also includes: 16 refs.
    Keywords: Fisheries ; Atya gabonensis ; Macrobrachim felicinum ; Nigeria ; Maiduguri ; Nigeria ; Niger ; Jebba L. ; freshwater environment ; Stock assessment ; Allometry ; Growth ; Depleted stocks ; Catch/effort ; Condition factor ; Length-weight relationships ; Shrimp fisheries
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  • 187
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    Spatial mapping of shellfish marketing in Kure Ultra modern market, Minna, Niger State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24105 | 19325 | 2018-05-16 13:50:13 | 24105 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Geographic Information system and Remote Sensing in the field of marketing is used in this study to open up a wide range of its possible applications as the study assessed shellfish marketing in Kure Ultra Modern Market Minna Niger State. The aim was to develop a database of various shellfish product on sale at the market. The demographic profile, socio-economic characteristics of the marketers and problem associated with the marketing, 100 questionnaires were administered the analytical tool used were frequency distribution, tables, percentages and cost-benefit ratio. Returns from the interview and questionnaire were use to verify the result which depicts that both male and female were engage in the business with female forming the majority group (55%) and 45% men. Marketing of the shellfish was profitable which was attributed to realization of the significant of shellfish over meat. The high profit was recorded in raining seasoning (70%) while dry season sales were 30%. Species of shellfish marketed were crayfish, prawn, cockles, snail, shrimps and crabs. The study also shows that the shellfishes mostly sold are in fresh form (85%) while 15% are in dry form. Daily sales ranges from N1000-N5000, majority of the respondents (75%) patronize low-cost transportation means between N500-N1000. In every enterprise there must be a problem; most of the problem encountered by the respondents were lack of constant supply from the landing site which is mostly marine environment, inadequate storage facility, poor transportation, high tax charges and theft; all this attribute data and the co-ordinate of the selling point at the market were put into ArcGIS environment. Base on the findings, recommendations were profiled to the government and database kept for references.
    Description: Includes: 4 tables and 4 figures;Also includes: 9 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Geographic information system ; Remote sesing ; Attribute Data ; Database ; marketing ; Distribution channels ; Cost and returns profit ; Spatial mapping ; freshwater environment ; Shellfish ; Mapping ; Marketing ; Fish ; Socioeconomic aspects ; GIS ; Remote sensing ; Distribution
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  • 188
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    Sensory evaluation of fish spring roll produced from tilapia and catfish (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24104 | 19325 | 2018-05-16 13:46:24 | 24104 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Acceptance of fish spring roll produced from Tilapia and Catfish were evaluated in an attempt to explore the possibilities of better utilization of undersized Tilapia and Catfish species. The products were produced with cooked potatoes (20%) egg (0.5%), milk (0.21%), butter(10.47%), flour(41.87%), vegetable oil(16.75%), carrot(0.46%), pepper (0.04%), made up to 100% with 10% inclusion of Tilapia in Tilapia spring roll and Catfish in Catfish spring roll. Tilapia and Catfish were boiled in a boiling pot before deboning for 10 minutes and then mashed for 5 minutes. The vegetables were chopped and steamed in a steaming pot for 5 minutes. 41.87% of flour was mixed together with steamed fishes and vegetable and rolled out into cylindrical shape of one inch thickness, deep fried in 800ml of vegetable oil and then allowed to cool. The acceptance was evaluated with 25 man panel based on taste, flavor, colour and texture. 80% of the panelist preferred spring roll made from Tilapia to those made from Catfish. 90%$ like the texture and flavor of spring roll made from catfish than that of Tilapia. There was higher consumer acceptability for spring roll made from Tilapia. In the flavor and colour of the spring roll, there was no significant difference observed between rolls made from catfish and Tilapia. Commercialization of these products can contribute to diversification in the fish industry through better utilization of undersized Tilapia and Catfish.
    Description: Includes: 1 table and 1 figure;Also includes: 7 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Ingredient ; Recipes ; Production ; Preparation ; Qiality and nutrition ; Fish spring Roll ; freshwater environment ; Sensors ; Evaluation ; Fish ; Feeding experiments ; Utilization ; Minced products ; Animal nutrition ; Fishery products
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    Potential impact of climate change on fisheries and aquaculture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24584 | 19325 | 2018-05-20 15:57:28 | 24584 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Climate change will have significant impacts on Nigeria's freshwater and marine aquatic systems. and hence on the countries fisheries and aquaculture. Fisheries and aquaculture are highly vulnerable to changes in weather pattern. and the impacts, which could be negative or positive, will vary from the coastal areas to the drier northern parts of the country. Elevated water temperalures will affect fish physiological processes, thereby affecting spawning. survival of the juveniles, recruit into the exploitable phase of population, population size, production and yield. The impacts of increased flooding of the freswater bodies will be negative through erosion of watershed, destruction of fish feeding and breeding habitats, decrease in primary productivity and alteration of the normal resilience of the aquatic systems, or positive in expansion of aquatic habitats for primary and fish productions especially during the dry season. Drought will exacerbate draw down of the lakes and reservoirs, and insufficient flow in the river hasins for spawning and primary pro duction thereby affecting fish production. Rise in the water level of the Atlantic ocean will lead to intrusion of more salty wafer into The river delta areas, and inundation of the coastal low-lying areas, thus affecting distribution of both the freshwater and marine fishes as a result of changes in the physical and chemical properties of the waters. The impacts will ultimately affect fish population, production and supply, thereby affecting the livelihood of over 26 million people engaged in the primary and secondary sectors of the fisheries industry, as well as food security of the country. The adaptation and mitigation strategies will be based on the peculiar characteristics and interactions of fisheries and aquaculture within the framework of feasible policy instruments. Strategies and policy measures need to be evolved to combat the observable and projected impacts of climate change on fisheries and aquaculture, in order to protect the livelihoods of the fishing communities and food security.
    Description: Includes: 13 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Fisheries ; Nigeria ; Climate change ; Fisheries ; Aquaculture ; Impacts ; Mitigation ; Food security ; freshwater environment ; automation
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  • 190
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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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  • 191
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    Impact of water hyacinth (Eichhornia crassipes) on fish catch in the lower Taylor Creek area of Bayelsa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24605 | 19325 | 2018-05-21 12:24:48 | 24605 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The aim of the study was to access the impact of water hyacinth, Eichhornia crassipes on fish catch in the lower Taylor Creek area of Bayelsa State. The experimental approach involved the division of the creek into new stations: infested and non-infested at the littoral zone. Subsequently, the deployment of six Malian traps with dimensions of 70cm diameter and 80cm height were set in each station for a period of six months using groudnut cake as bails. Furthermore, fish caught were counted and identified into families and species. From results, fish species composition obtained from the stations were a total of 9 families and 15 species. However, it was observed that the water hyacinth infested area had the lowest fish catch while the non-infestated area had the highest number of fish catch for both dry and wet season. It is therefore concluded that the invasion of Eichhornia crassipes impacted on fish population and composition.
    Description: Includes: 12 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Eichhornia crassipes ; Fish catch ; Taylor creek ; Bayelsa ; freshwater environment ; automation
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    Assessment of heavy metals in water and fish from Ibrahim Adamu Lake, Jigawa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24612 | 19325 | 2018-05-22 05:59:44 | 24612 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to assess the levels of heavy metals in water and the flesh of tilapia (Oreochromis niloticus). Water and tilapia were sampled for a period of 12 months from October, 2003-september 2004. Water and muscle tissue were analysed for Cu, Cr, pb, and Zn using flame atomic absorption spectrophotometer. The assessment showed Cr (3.35mg/l), Cu (0.75mg/l), pb (0.81mg/l) in water while Cr(2.27mg/kg) and pb (0.27mg/kg) were found to be high in the tissue samples and were above the values recommended by WHO and the Food and Agricultural Organization (FAO)of the United Nations and therefore not safe for human consumption.
    Description: Includes: 17 references.
    Keywords: Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Heavy metals ; Oreochromis niloticus ; Atomic absorption ; Spectrophotometer ; freshwater environment ; automation
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  • 193
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    Survey of physical characteristics of the upper reaches of new Calabar River, Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Physico-chemical parameters in relation to fish production of Dadin Kowa Dam, Gombe State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Genetic status of tilapia at Badore landing site using RAPD markers (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24620 | 19325 | 2018-05-22 06:15:41 | 24620 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Molecular technique based on Random Amplified Polymorphic DNA (RAPD) analysis was applied to study genetic status among tilapia species from Badore landing site of Lekki lagoon. Individual variations within species population were assessed using PCR-RAP analysis with five Operon primers (OPC04, OPA02, OPB08, OPE02 and OPF03, Operon Technologies Inc, USA) which revealed dif ferent banding patterns of varying primer reproducibility. Graphical representation using UPGMA cluster analysis produced a dendrogram chart with five clusters (~f, ~e, ~p ,~S, and ~W) indicating different degrees of variations and similarities. There were various levels of genetic similarity observed possibly due to hybridization. Nevertheless, few distinct variations among the samples were visible, show ing possible genetic variability. At 0.89 (89%) coefficient, cluster,~f is made up of 7 samples which are genetically similar. At 0.834 (83.1 %) coefficient, distinct sample BTl2 forms a cluster (~p) with cluster ~f which shows they are related at this coefficient. Cluster ~W (84% coefficient) comprising of 7 samples forms another cluster with a distinct sample BT06 at about 0.79 coefficients. At 78.6% coefficient (cluster ~e). All the samples are genetically similar except sample BT17. This distinct sample can increase genetic variability by a cross between it and other strains of tilapia. Therefore, care should be taken by fish farmers who buy or use the fish samples from this landing site for culture. Proper molecular characterization of this fish species before culture becomes necessary to avoid genetic problems.
    Description: Includes: 17 references.
    Keywords: Biology ; Fisheries ; Nigeria ; Genetic ; Tilapia ; RAPD ; Badore ; freshwater environment ; automation
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    Preliminary investigation of fish species abundance of Otammiri River, Owerri, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24626 | 19325 | 2018-05-22 06:25:03 | 24626 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study of fish species abundance of Otammiri River, Owerri, Nigeria was conducted from April to August, 2012. Four hundred and three (403)fishes belonging to 10 families, 16 genera and 21 species were collected from artisanal fishers using various fishing gears. The fish samples were taken to laboratory, identified, counted and their weights and lengths measured. The unnamed cichlid species ranked highest in percentage number and weight as well as Index of Preponderance (38.7%, 33.6% and 51.1% respectively), while the least were Polycentropis abbreviata, Hepsetus odoe, Synodontis omias, Chrysichthys aluensis and Chrysichthys furcatus each constituting 0.2% of the total number of fish collected. Among fish families, Cichlidae ranked highest in percentage number (82.63%) and weight (81.2%), followed by Hepsetidae (5. 7% and 8.0%) and Anabantidae (4.47% and 2.8% respectively). The least were Characidae, Notopteridae and Mochokidae. The presence of an unnamed fish species in the river is an indication that there could be more unknown aquatic living resources with strong potential benefits to the River. The information provided in this study reflects the potential of the fish resources of Otammiri. This will serve as invaluable baseline tool in fisheries management planning and policy formulations that will enhance the development of fisheries in the area.
    Description: Includes: 15 references.
    Keywords: Ecology ; Fisheries ; Polycentropsis abbreviata ; Hepsetus odoe ; Synodontis omias ; Chrysichthys aluensis ; Chrysichthys furcatus ; Nigeria ; Otammiri River ; Index of preponderance ; Fisheries management ; Otammiri River ; freshwater environment ; automation
    Repository Name: AquaDocs
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    Format: 237-240
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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
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    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
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 253-255
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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
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    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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 423-427
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 380-384
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 388-391
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