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  • 101
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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
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: 109-116
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  • 102
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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
    Repository Name: AquaDocs
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    Format: 131-134
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  • 103
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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
    Repository Name: AquaDocs
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    Format: 128-130
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  • 104
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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
    Repository Name: AquaDocs
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    Format: 135-143
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  • 105
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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
    Repository Name: AquaDocs
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    Format: 179-185
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  • 106
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    Issues limiting the expansion of brackish water aquaculture in the coastal area of Niger Delta (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24093 | 19325 | 2018-05-12 14:42:46 | 24093 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Brackish water Fish Farming is a type of aquaculture that is practiced in the coastal areas. This involves culture of quality fin and shell fishes that are found in the creeks, lagoons and estuaries. It has a capacity and potential of bridging the wide gap between fish demand and supply in these areas. The development of brackish water aquaculture in Niger Delta started many decades ago, its growth and expansion since then has been limited, unlike freshwater aquaculture which has recorded phenomenal growth in recent years. This paper reviews the constraints hindering the effectiveness of the existing conditions of brackish water aquaculture production and also examines the possible solutions to these constraints, for its growth and expansion in the coastal areas of Niger Delta.
    Description: Includes: 6 tables;Also includes: 21 refs.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Niger Delta ; Brackish water ; Constraints ; Niger Delta ; AQuaculture ; Fish ; brackishwater environment ; marine environment ; Brackishwater aquaculture ; Coastal zone ; Finfish fisheries ; Shellfish culture ; Potential yield ; Aquaculture ; Pollution effects
    Repository Name: AquaDocs
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    Format: 169-178
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  • 107
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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
    Repository Name: AquaDocs
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    Format: 206-209
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  • 108
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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
    Repository Name: AquaDocs
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    Format: 210-213
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  • 109
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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
    Repository Name: AquaDocs
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    Format: 193-200
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  • 110
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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
    Repository Name: AquaDocs
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    Format: 252-260
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  • 111
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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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    Format: 261-265
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  • 112
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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
    Repository Name: AquaDocs
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    Format: 247-251
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  • 113
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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
    Repository Name: AquaDocs
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    Format: 243-246
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  • 114
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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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  • 115
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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
    Repository Name: AquaDocs
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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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    Acute toxicity test in aquaculture: a review (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24610 | 19325 | 2018-05-22 05:57:31 | 24610 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Acute toxicity test involves estimation of LC50 or LD50 which is the concentration or dose which proved to be lethal causing death to 50% of the tested organisms. This article reviews the methods utilized for the determination of probit and LC50 and also explain the use of Minitab 14 statistical package and Microsoft office excel 2007 for accurate, speedy and qualitative presentation of toxicity results. We also present a brief review on the relationship between uptake route of toxicants and their toxic effects.
    Description: Includes: 19 references.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Bioassay ; LCsub50/sub ; Probit ; Computation ; Minitab 14 ; freshwater environment ; automation
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    Assessment of heavy metals in water and fish from Ibrahim Adamu Lake, Jigawa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24612 | 19325 | 2018-05-22 05:59:44 | 24612 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to assess the levels of heavy metals in water and the flesh of tilapia (Oreochromis niloticus). Water and tilapia were sampled for a period of 12 months from October, 2003-september 2004. Water and muscle tissue were analysed for Cu, Cr, pb, and Zn using flame atomic absorption spectrophotometer. The assessment showed Cr (3.35mg/l), Cu (0.75mg/l), pb (0.81mg/l) in water while Cr(2.27mg/kg) and pb (0.27mg/kg) were found to be high in the tissue samples and were above the values recommended by WHO and the Food and Agricultural Organization (FAO)of the United Nations and therefore not safe for human consumption.
    Description: Includes: 17 references.
    Keywords: Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Heavy metals ; Oreochromis niloticus ; Atomic absorption ; Spectrophotometer ; freshwater environment ; automation
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    Survey of physical characteristics of the upper reaches of new Calabar River, Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Effects of atrazine on Nile tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24616 | 19325 | 2018-05-22 06:07:52 | 24616 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Mechanization of agriculture to promote and improve the yields from agricultural practices has necessitated the use of pesticides and other agrochemicals. The effects of using these pesticides on the environment are rarely considered by farmers. This study investigated the effects and sub-lethal effect of atrazine on tilapia, an ubiquitous culturable fish species. The 96 hr LC50 was determined using static renewal bioassay method while the effect on haematological parameters was determined after exposure for 3 weeks to sub-lethal doses of atrasine. The LC50 was found to be 6.977mg/l. Sub-lethal exposure resulted in anaemia and increased the white blood cell counts.
    Description: Includes: 11 references.
    Keywords: Aquaculture ; Pollution ; Oreochromis niloticus ; Nigeria ; Nile tilapia ; Atrazine ; Lethal ; Sub-lethal ; freshwater environment ; automation
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    Format: 197-199
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    Physico-chemical parameters in relation to fish production of Dadin Kowa Dam, Gombe State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Genetic status of tilapia at Badore landing site using RAPD markers (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24620 | 19325 | 2018-05-22 06:15:41 | 24620 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Molecular technique based on Random Amplified Polymorphic DNA (RAPD) analysis was applied to study genetic status among tilapia species from Badore landing site of Lekki lagoon. Individual variations within species population were assessed using PCR-RAP analysis with five Operon primers (OPC04, OPA02, OPB08, OPE02 and OPF03, Operon Technologies Inc, USA) which revealed dif ferent banding patterns of varying primer reproducibility. Graphical representation using UPGMA cluster analysis produced a dendrogram chart with five clusters (~f, ~e, ~p ,~S, and ~W) indicating different degrees of variations and similarities. There were various levels of genetic similarity observed possibly due to hybridization. Nevertheless, few distinct variations among the samples were visible, show ing possible genetic variability. At 0.89 (89%) coefficient, cluster,~f is made up of 7 samples which are genetically similar. At 0.834 (83.1 %) coefficient, distinct sample BTl2 forms a cluster (~p) with cluster ~f which shows they are related at this coefficient. Cluster ~W (84% coefficient) comprising of 7 samples forms another cluster with a distinct sample BT06 at about 0.79 coefficients. At 78.6% coefficient (cluster ~e). All the samples are genetically similar except sample BT17. This distinct sample can increase genetic variability by a cross between it and other strains of tilapia. Therefore, care should be taken by fish farmers who buy or use the fish samples from this landing site for culture. Proper molecular characterization of this fish species before culture becomes necessary to avoid genetic problems.
    Description: Includes: 17 references.
    Keywords: Biology ; Fisheries ; Nigeria ; Genetic ; Tilapia ; RAPD ; Badore ; freshwater environment ; automation
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    Preliminary investigation of fish species abundance of Otammiri River, Owerri, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24626 | 19325 | 2018-05-22 06:25:03 | 24626 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study of fish species abundance of Otammiri River, Owerri, Nigeria was conducted from April to August, 2012. Four hundred and three (403)fishes belonging to 10 families, 16 genera and 21 species were collected from artisanal fishers using various fishing gears. The fish samples were taken to laboratory, identified, counted and their weights and lengths measured. The unnamed cichlid species ranked highest in percentage number and weight as well as Index of Preponderance (38.7%, 33.6% and 51.1% respectively), while the least were Polycentropis abbreviata, Hepsetus odoe, Synodontis omias, Chrysichthys aluensis and Chrysichthys furcatus each constituting 0.2% of the total number of fish collected. Among fish families, Cichlidae ranked highest in percentage number (82.63%) and weight (81.2%), followed by Hepsetidae (5. 7% and 8.0%) and Anabantidae (4.47% and 2.8% respectively). The least were Characidae, Notopteridae and Mochokidae. The presence of an unnamed fish species in the river is an indication that there could be more unknown aquatic living resources with strong potential benefits to the River. The information provided in this study reflects the potential of the fish resources of Otammiri. This will serve as invaluable baseline tool in fisheries management planning and policy formulations that will enhance the development of fisheries in the area.
    Description: Includes: 15 references.
    Keywords: Ecology ; Fisheries ; Polycentropsis abbreviata ; Hepsetus odoe ; Synodontis omias ; Chrysichthys aluensis ; Chrysichthys furcatus ; Nigeria ; Otammiri River ; Index of preponderance ; Fisheries management ; Otammiri River ; freshwater environment ; automation
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    Fecundity, gonadosomic index and spawning period of Chrysichthys nigrodigitatus of the Lower Cross River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24629 | 19325 | 2018-05-22 06:30:19 | 24629 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The estuarine catfish, Chrysichthys nigrodigitatus, is a prized food fish in Nigeria especially in the Niger Delta region. There is a growing concernrn over the sustainability of the fishery in the face of climate change and environmental variability. Studies were conducted on the fecundity, gonadosomatic index and the spawning period of the species. The objectives were to determine the average fecundity of the species and to use the gonadosomatic index to determine its spawning period with the aim of proffering management advice and prerequisites of the species in the face of climate change. A total of 44 females and 40 males were used for the study which spanned the period from May 2011 to April 2012. The fecundity of the species ranged from 3,730.5 eggs to 41,535.9 eggs. There was correlation between the total fecundity and fish weight (p~,01, r= 0.80, n= 44). The regression model for the relationship was expressed as fecundity = 4660.8+4.76 weight. The gonadosomatic index was highest in the month of May and dropped sharply in june signifying that spawning in Chrysichthys nigrodigitatus starts around this period. The implications of these findings in respect to sustainability of the species, and its aquaculture in the face of climate change are discussed.
    Description: Includes: 14 references.
    Keywords: Fisheries ; Atmospheric Sciences ; Chrysichythys nigrodigitatus ; Nigeria ; Lower Cross River ; C. nigrodigitatus ; Reproduction ; Climate change ; Cross Rivber ; Sustainability ; freshwater environment ; automation
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    Fish processing technologies in Eti-Osa Local Government Area of Lagos State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24671 | 19325 | 2018-05-23 07:46:56 | 24671 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Traditional fish processing technologies vary widely in terms of equipment type, size and processing efficiency in Nigeria's coastal states. This study was carried out to identify fish processing technologies and evaluate the effectiveness, energy sources and efficiency of fish smoking equipment in use in the study area. Data were collected using structured questionnaire administered between January and March, 2011 in seven fishing villages along the coastline in the lbeju-Lekki LGA, Nigeria. Major fish species being processed were identified; and the profitability of the post harvest technologies adopted was evaluated. A total of five traditional fish processing equipment were observed; and included galvanized iron sheet supported by planks 51 (46.4%); drum oven 8 (7.2%); black clay oven 24 (21.8%); red clay oven 9 (8.1%); brick kiln 5 (4.2%) and government model kiln 4 (3.5%). Generally, energy sources were fuel wood and charcoal for traditional fish processing equipment; and electricity for the government model kiln. Majority of traditional fish processors were peasant women; and three types of processing technologies were observed, including air drying (1.0%), hot smoking 169.1%); and salting and smoking (29.9%). The capacity of kilns and ovens observed ranged from 20 to 50kg daily with a price range of Nl0,000 to N50,000. Factors considered before replacement of smoking equipment by the processors were equipment ruggedness, cost and production capacity. Women's involvement in traditional fish processing was 95%; and major fish species in the value chain included Ethmalosa fimbriata, Caranx senegallus, Sardinella maderensis,Drepane africana, Cynoglossus monodis, Pseudotolithus megalensis, P. typus, Arius latiscutatus and A. mercatoris. It was observed that products of traditional fish processing industry were readily acceptable to consumers and commanded marginal market prices with optimal economic benefits to processors.
    Description: Includes: 25 references.
    Keywords: Fisheries ; Nigeria ; Fish value chain ; Coastline ; Processors ; Women ; Traditional fish processing equipment ; freshwater environment ; automation
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    Fisher folk's response to climate change in New Bussa and its environs of Kainji Lake Basin, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24661 | 19325 | 2018-05-27 14:57:38 | 24661 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study examined fisher folk responses to climate change in Kainji lake basin. The sample comprises of fisher folks within and New Bussa. Eighty questionnaires were administered to obtain the primary data and analysed using descriptive and inferential statistical tools. The results revealed that majority (70%) of the respondent were male, however (61.2%) of them had tertiary education. Majority (60%) of the respondents were aware of changes in climate in the area. Majority (65%) and (55%) of the respondents were involved in incidence of deforestation and charcoal production respectively. In conclusion, it was discovered that little knowledge about climate change and its effects were found among fisher folk. Therefore it recommends that sensitization workshops/lectures be done to enable the fisher folk have adequate knowledge on climate change and the implications on fisheries activities in the basin.
    Description: includes: 11 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Climate change ; Fisher folk ; Fishing community ; Awareness ; freshwater environment ; automation
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    Public relations and extension services in Nigerian fisheries industry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24663 | 19325 | 2018-05-27 14:59:47 | 24663 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The paper discussed the importance of fish as a food commodity and the rich icthyofauna resources of Nigerian territorial which has not been optimally utilized to be sustainable. Among the challenges facing the fisheries subsector of Nigerian economomy apart from overfishing, poor post-harvest technology and high incidence of sea piracy is poor level of communications, public relations, restricted access to extension services especially to the rural artisanal fisherfolks/fish farmers in Nigeria . This has been identified as contributory to the increasing shortfall between demand and supply of fish in Nigeria. There is a need/or a good public image fisheries concerns. Production and marketing personnel need to respect the wishes of the consumers and have good interpersonal relationships. Communication should be a 2-way affair between the extension officers and the fisherfolks in the rural communities to be achieved. The various media that could aid better dissemination in the Fisheries subsector were highlighted. The author recommended better funding, training of extensionists and target audience, improved public sensitization of rural practitioners to fish output. There is a need for a more productive and result-oriented reform in Nigerian extension system. A unified extension is also recommended for effective extension education from the stage of production, handling, processing, transport and retailing. More conducive enabling environment should be created by the government.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Nigeria ; Public relation ; Communication ; Funding ; Extensionists ; Fisherfolks ; freshwater environment ; automation
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    Comparative nutritional composition of smoked catfish (Clarias gariepinus) produced from NIOMR smoking kiln and local cut-drum oven (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24668 | 19325 | 2018-05-23 07:52:49 | 24668 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of two different preservative equipment-the NIOMR (Nigerian Institute for Oceanography and Marine Research) kiln and local cut-drum oven-on crude protein, minerals and vitamins of C. gariepinus were studied. The fish were obtained from Africa Regional Aquaculture Centre, Aluu, Port Harcourt. Moisture, crude protein, crude fibre, crude fat and ash content were determined using standard methods. There were significant differences (P〈0.05) in the moisture and crude fiber content. The moisture content of the fish sample ranged from 2.18 to 5.98, this could be attributed to the drying methods. The crude fibre content ranged from 2.78 and shows no significant difference. The ash content of the samples ranged from 0.25- 0.6%, an indication that smoking reduces the ash content of fish. Result of the crude protein of fresh fish was 21.84 ~c 1.10 which increased to 59.53 ~c 1.88 and 35.41 ~c1.00 in NIOMR smoking kiln and local oven respectively. This means that, there was a significant different in the effects of the two dryers on crude protein. The vitamin content of both ovens showed no significant difference except in vitamin A which was significant in the fish dried with smoking kiln. There was significant different (p〈0.05) in the mineral content of the two drying equipment, this was in Sodium, Potassium and Phosphorus level of fish smoked with NIOMR smoking kiln. This result indicates that the two drying methods have varying effects on the nutritional quality of catfish, which is in favour of NIOMR kiln.
    Description: Includes: 8 references.
    Keywords: Fisheries ; Nigeria ; Smoking ; Production ; Preservative research ; Quality ; freshwater environment ; automation
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    The effect of feeding regime and rate on the growth of Clarias gariepinus (Burchell, 1822) fingerlings fed with artificial feed (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24163 | 19325 | 2018-05-26 12:00:29 | 24163 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish growth is a function of adequate supply of feed in the right quantity and time. The effect of feeding rate on the growth of Clarias gariepinus (Burchell, 1822) was studied for a period of 22 weeks. The fish were fed at the same percentage body weight throughout the study period and a bi-weekly weight gain was measured. Water quality parameters were also monitored. There was a significant increase in weight gain in daily feeding regime than in the ones in two days feeding regime. The increase in weight for the daily feeding regime was visible as from the 8th week while that for the ones in two days feeding was only significantly different in 22nd week at 0.05 level of significance. The relationship between the two feeding regime types also revealed that the daily feeding performed better than the ones in two days feeding regime.
    Description: Includes: 2 tables.;Also includes: 10 references.
    Keywords: Aquaculture ; Pollution ; Ecology ; Clarias gariepinus ; Nigeria ; Niger ; Feed ; Fish growth ; Feeding regime and weight gain ; freshwater environment ; Feeding ; Growth rate ; Freshwater fish ; Fingerlings ; Length-weight relationships ; Water quality ; Fish culture
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    Preliminary investigations of Njuwa Lake, Adamawa State, for fish production enhancement and resuscitation of Njuwa annual cultural fishing festival (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23228 | 19325 | 2018-03-18 14:56:29 | 23228 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Lake Njuwa has a historical and cultural heritage and has been a veritable source of livelihood to the people of Yola town on the South-western side, and Rugange village on the North-eastern side of the lake. Many Rivers and streams flow into the Lake. From the South Western side River Chouchi and Mayo Chudde; from the South Eastern side by numerous streams such as Mayel Lumo, Mayel Kalwa, Mandare streams and many other small streams (about five) drain into Njuwa Lake. The major contributor to the Lake is a "neck" in the North Eastern side of the Lake which emanates from Benue River. When River Benue is full especially when Lagdo spill gates are open in September, the neck allows water from the back-flow of Benue to enter the Lake and with it comes the recruitment of the Lake's fish species diversity Preliminary investigation revealed that Njuwa Lake despite its numerous environmental problems which sometimes leads to its complete drying, has very ideal limnological parameters for fish production. Njuwa was reported to be 17.5km2 (17500m2) before the construction of Lagdo dam on River Benue on the Nigeria-Cameroon boarder by the Cameroonian Authorities and the numerous irrigation projects around the Lake and River Benue. As at December 1981 however, aerial photos showed that it had shrunk to 3.5 km (3,500m2). As at November 2004, it has completely dried up. It was reported that cars could actually drive through on the dry bed of the Lake. The average depth of the Lake is around 0.5 meters and the water is very turbid. Farming around the Lake has triggered a higher level of deposit into the flood water which serves as silting material for the Lake. This is in addition to farm chemicals run off from the rain fed and irrigated crop, increasing the nutrient supply to lake's water thereby leading to accelerated eutrophication with it adverse consequences. Fish species diversity is also very high from on site report. Therefore the lake offers a unique potential for both artisanal fishing and fisheries tourism through the resuscitation of the cultural fishing festival despite the environmental degradation that it has suffered over the years. In view of the great prospects of the Njuwa Lake basin, if properly developed for its multidimensional benefits to the local economy in tourism job creation, food security, livelihood diversity and environmental improvement, the development of the lake basin on a holistic basis is highly recommended. The process should capture and involve the interest of all stakeholders around the Lake.
    Description: Includes:- 1 table.;1 fig.
    Keywords: Fisheries ; Limnology ; Nigeria ; Njuwa L. ; freshwater environment ; Fishery development ; Water conservation ; Fishery management
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    Food and feeding habit of freshwater Mormyrid (Hyperopisus bebe occidentalis, Gunther) in River Rima and Goronyo Dam, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23231 | 19325 | 2018-03-18 15:06:24 | 23231 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The food and feeding habits of Hyperopisus bebe occidentalis caught in River Rima and Goronyo Dam in North western Nigeria were investigated A total of four hundred and fifty four (454) fish samples were collected on monthly basis from October, 2001 to September, 2002 are examined for feeding adaptations and gizzard content. The mouth is terminal in studied species. Two types of teeth were identified viz; cardiform and molariform. The gill rakers were 0.09~c 0.04cm in length with 0.010~ccm interspacing. The compartment of gut included gizzard-like stomach. The gut length and fish length (GL-TL) indicated rectilinear positive relationship. The regression coefficient (b) and correlation coefficient (r) of the gut length fish length relationships were significant (p〈 0.05). The main taxa of food items identified included substances of plant and animal origins, with overall percentage occurrence of 69.8 and 20.7% for samples from River Rima and 59.1 and 20. 0% for those from Goronyo Dam in the same order. During the dry season, the frequency occurrence of plant substances were higher in the juveniles (〈30cm, TL) 70.9% and adults (=30cm, TL) 64.7% in River Rima than the values obtained in samples from Goronyo Dam. Their occurrences in Goronyo Dam were fairly higher in the adults (62.9%) than in the juveniles (53.6%) during the same season. The results of this study showed higher occurrence of plant materials in juveniles than in the adults from the two water bodies during the rainy season. Contrary to this, low frequency occurrence of substances of animal in the juvenile samples from River Rima (15.2%) and Goronyo Dam (17.1%) were obtained in adult samples, the occurrence of animal substances were more than those of plants from the two seasons and water body. The feeding adaptive features revealed the ecological roles of the fish species that could be useful in satisfying their food requirements in culture systems and for teaching and further research.
    Description: Includes:- 5 tables.;19 refs.
    Keywords: Ecology ; Fisheries ; Hyperopisus bebe occidentalis ; Nigeria ; Rim R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Feeding behaviour ; Feeding ; Food preferences
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    Potentials of some medicinal plants as fertility enhancing agents in fish (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23236 | 19325 | 2018-03-18 15:14:46 | 23236 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The potentials of some medicinal plants that enhance fertility in animals were highlighted. Though, these medicinal plants can be used for other purposes but this paper focused on the fertility potential of the plants on animals. Some of the plants such as date palm (Phoenix dactylifera), wild yam (Discorea villosa) and Focus capensis had been discovered to enhance fertility in rats, monkey and poultry. Therefore if these medicinal plants could work on rats and poultry for fertility enhancement, the plants could as well be tried on fish so as to enhance the fecundity and sperm production in female and male brooders which will eventually lead to increase in fish seeds production. However, research is on going on the use of some medicinal plants to enhance fecundity and sperm production in male and female brooders in order to increase fingerlings production which would subsequently lead to increase in fish production.
    Description: Includes:- 1 table.;12 plates.;22 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; freshwater environment ; Fertility ; Aquatic plants
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    Socio-cultural impact of tourism in Nigeria: a case study of fisheries development in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23244 | 19325 | 2018-03-25 12:38:25 | 23244 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Socio-cultural impact of tourism has become a veritable tool for fisheries development in Nigeria. Little wonders that Nigeria who has a great potential in tourism and rich cultural heritage and notable festivals attracts tourist not only in Nigeria but other parts of the World are not fully explored. Among many other popular festivals is the Niger Delta holds the Ikwere, Kalabari and Obirika festivals, to celebrate the water head dress that imitate the heads of fish or water birds. Many communities, including those in north, have a version of the harvest festival. Also in the north, the Argungu fishing festival occasion takes place in Argungu, in Birnin Kebbi State, during February and dates back to the 16th century. During the festival, hundreds of local men and boys enter the water armed with large fish net scoops, and the competition is to catch the biggest fish. With a population of almost 140 million people comprising of over 250 ethnic groups, Nigeria is a blend of exciting socio-cultural diversity that has produced a land of un parallel opportunities for fisheries development.
    Description: Includes:- 11 refs.
    Keywords: Fisheries ; Law ; Sociology ; Nigeria ; freshwater environment ; Sociological aspects ; Tourism ; Fishing ; Recreation
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  • 134
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    A review of length-weight relationship and its parameters in aquatic species (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23248 | 19325 | 2018-03-25 12:51:59 | 23248 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Length weight relationship and its parameters are requiring in practical assessment of stocks of aquatic species. The exponent b describes the growth condition of the species in question. If the value of b is 3 around 3, the fish is said to exhibit isometric growth if the value of b is less or greater than 3 the species is said to exhibit isometric growth if the value of b is less or greater than 3 the species as exhibiting both isometric and allometric conditions. Such conclusions are erroneous and misrepresentation of scientific facts. They stem from the use of inappropriate methods in estimation of the LW parameters and the authors? lack of understanding of the biological theory behind the growth conditions. To correct these erroneous presentations, the paper highlights the appropriate approach for the estimation of the LWR parameter. Large sample size. Wide size range and appropriate statistical tools are essential ingredients for accurate estimation of the LW parameters. The paper also elucidates on the concept of isometric and allometric growth in fishes and other invertebrates. A minimum of one year time scale of data collection in order to capture all the size ranges, from the young of the year to the oldest individual in the population, so as to reflect the ontogenetic growth performance of the aquatic species, have been proposed
    Description: Includes:- 4 tables.;15 refs.
    Keywords: Ecology ; Fisheries ; Ethmalosa fimbriata ; Cirrhinus reba ; Rhinomugil corsula ; Micropogonias furnieri ; Nigeria ; freshwater environment ; Length ; Length-weight relationships ; Body size ; Body weight ; Growth
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  • 135
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    Occurrence and dissolution of rigor-mortis in Bagrus bayad macropterus and Mormyrus rume from River Rima Sokoto (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23251 | 19325 | 2018-03-25 14:33:27 | 23251 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: A total of eighty nine samples comprising 45 B. bayad and 44 M.rume from River. Rima were subjected to evaluation of rigor-mortis occurrence and dissolution; Total weight and total length of the species were measured using electric top loading balance (16000gm) and measuring board, respectively. Stop watch and calibrated thermometer were used for recording time and temperature to determine rigor mortis duration and temperature effect. The results showed that the duration from capture to dissolution of rigor was higher in M.rume than B. bayad, despite the fact that temperature ranges were similar. Factors such as size distribution and level of exhaustion might have contributed to the variations. In the light of the above, it is recommended that factors resulting to rapid exhaustion of B. bayad be looked into with a view to lowering it and subsequent elongation of the rigor period.
    Description: Includes:- 2 tables.;10 refs.
    Keywords: Fisheries ; Bagrus bayad macropterus ; Mormyrus rume ; Nigeria ; freshwater environment ; Fish spoilage ; Quality control
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  • 136
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    Relationship between the rainfall, water levels, flooding and fish supply from Asa Dam (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23247 | 19325 | 2018-03-25 12:49:34 | 23247 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Studies on the relationship between the rainfall, water levels and floods in Asa Dam Ilorin, Kwara State Nigeria was carried out for twelve months to determine the impact of these parameters on the supply of fish species from this dam to Ilorin and environ. Maximum rainfall (26.14 cm) was in September. The range values of rainfall recorded during this research was zero (November / February) to 26.14 cm (September). Water levels were lowest in April (11.40 m) and highest in September (12.80 cm). Increased water levels commenced from May (11.90 m) to October (12.60 m). The flooding of the dam began as from August when the dam spillway began to overflow. Assessment of fish catch from six fishermen around the lake showed significant increase in the fish supply at the dry season when water levels were low than the wet season (P 〈 0.05). Rainfall and water levels were negatively correlated.
    Description: Includes:- 1 table.;1 fig.;14 refs.
    Keywords: Environment ; Fisheries ; Nigeria ; Asa L. ; freshwater environment ; Rainfall ; Water levels ; Flooding ; Fish catch statistics
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  • 137
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    The fishery of Lake Yamama, Kebbi State, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23256 | 19325 | 2018-03-25 14:42:01 | 23256 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The highlights of the Fisheries Assessment Survey conducted at Yamama Lake in Kebbi State, North-western Nigeria in 2005 is presented. There were 17 fish species found in fishermen's landings during the survey period. About 25 fishermen were found using undersized nets to catch the juveniles of these species. Fishing pressure was found to be very high. The lake is 900 m in length and 195 m wide giving a surface area of about 18 hectares. For an optimum catch, about 4 fishermen ought to have engaged in full time fishing activities if the fisheries of the lake are to be managed on a sustainable basis. However, a surplus of over 100 fishermen was recorded actively fishing during the period of the assessment. All these have a depleting effect on the abundance and sizes offish caught from the lake. A community based fisheries management system, which establishes a participatory involvement of fishermen in the conservation and rational exploitation of fisheries resources for the well being of the stakeholders is recommended for the Lake.
    Description: Includes:- 3 tables,;1 fig,;4 refs.
    Keywords: Fisheries ; Nigeria ; Yamama L. ; freshwater environment ; Stock assessment ; Catch statistics ; Catch/effort ; Fishermen ; Fishermen statistics ; Fishery statistics
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    Nutrient composition of three commercially important fishes in Lake Kainji, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23331 | 19325 | 2018-04-06 16:11:10 | 23331 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The proximate composition, mineral content and amino acid profile of Synodontis membraneceous, Oreochromis niloticus and Pellonula afzeluisi was conducted. Results showed that P. afzeluisi had the highest crude protein content (73.00%) amino acid and mineral content. This was followed by O. niloticus (57.87%) and S. membraneceous (54.56%). Organoleptic analysis however showed that O. niloticus had significant overall acceptability, taste and aroma.
    Description: Includes:- 4 tables.;13 refs.
    Keywords: Fisheries ; Synodontis membraneceous ; Oreochromis niloticus ; Pellonula afzeluisi ; Nigeria ; Kainji L. ; freshwater environment ; Nutrition ; Nutritional types ; Sodium ; Calcium ; Potassium ; Magnesium ; Phosphorus ; Amino acids
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  • 139
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    Physico-chemical and bacteriological investigation of fish and water in Aiba reservoir, Iwo (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23326 | 19325 | 2018-04-06 16:03:20 | 23326 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study looked into the physicochemical and bacteriological investigation of fish and water in Aiba Reservoir. Water and fish samples collected were studied to assess their bacteriological and physicochemical characteristics and their suitability for domestic purposes. Structural questionnaires were administered to the fishermen around the reservoir and experiments were carried out in the laboratory to analyze the samples. The results showed that the total viable bacteria count was high(1.02 x 105 cfu/ml) while few Staphylococcus aureus and E. coli occurred insignificantly. The population of S. aureus and E. coli in the fish gills, liver and tissue were insignificant. The results obtained from the physicochemical analysis of the water samples showed that the reservoir has optimum water temperature of 29degreesC ~c 0.25, a pH of 7.70 ~c 0.20, dissolved Oxygen level of 7.20mgO2/1 ~c 0.20 and total hardness of 45.00 mg/ICaC03 ~c 1.05. The microbial load in the fish sample is higher than that in the water sample. Further strict hygienic measures and surveillance is recommended so as to improve the water quality and to avoid deleterious effects on the health of the Iwo inhabitants and its neighboring communities who also benefit from the reservoir.
    Description: Includes:- 2 figs.;11 refs.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Aiba Reservoir ; freshwater environment ; Physicochemical properties ; Bacteriology ; Water quality ; Water ; Bacterial counters
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  • 140
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    Motivational factors responsible for women involvement in fish processing and marketing around Lake Kainji (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23334 | 19325 | 2018-04-07 17:10:35 | 23334 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study examined women fish processors and marketers around Kainji Lake area. 150 respondents were selected from five fishing communities. The results revealed that 46 and 32 percents of the respondents were engaged primarily in fish processing and marketing to generate income to meet the need of the family. Majority (62%) of the respondents adopted the improved smoking kiln technology while only 22% of them still used the traditional sun-drying method. The prominent problem faced by women fish processors and marketers in the study area include difficulty in accessing credit facilities (rank 1). The chi-square analysis showed a non-significant relationship (P = 0.05) between adoption of improved fish processing technologies and marital (X2 cal = 0.252; X2 tab = 3.841); monthly income X2 cal= 7.815; X2 tab= 2.427) and educational X2cal= 7.815; X2 tab= 2.619) characteristics of the respondents. It is recommended that government should provide the women fish processors and marketers with credit facilities and modem fish processing equipment at subsidized rates.
    Description: Includes:- 6 tables.;6 refs.
    Keywords: Fisheries ; Nigeria ; kainji L. ; freshwater environment ; Women ; Fishery products ; Processed fishery products
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  • 141
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    Relationship between fishmongers and fisher-folks: a case study of Monai, Yuna and Fakun fishing villages of Kainji and Jebba lakes (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23335 | 19325 | 2018-04-07 17:12:17 | 23335 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study assessed the relationship between fishmongers and fisherfolks in Monai, Yuna and Fakun fishing villages of Kainji and Jebba Lakes. 20 structured questionnaires were administered in each of the three villages to randomly selected fisherfolks. The study shows that low literacy and poverty level among most of the fisher-folks made them depend on fishmonger by hiring their fishing nets at exorbitant price, this has not allowed them to determine the prices of their catches, hence fishmongers have an influence on the livelihood of the fisher folks and their family.
    Description: Includes:- 3 tables.;6 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Kainji L ; Nigeria ; Jebba Lake ; Nigeria ; Monai ; Nigeria ; Yuna ; Nigeria ; Fakun ; freshwater environment ; Marketing ; Financing ; Pricing ; Market research
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  • 142
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    The role of women in the fishing community of Doma Dam, Nasarawa State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23337 | 19325 | 2018-04-07 17:15:33 | 23337 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study was carried out to assess the role of women in the fishing activities around the Doma dam fishing community in Nigeria. The study reveals that women participate in all fishing activities and play significant role in family income generation from gear construction, fish catch, transportation, processing to marketing of the fish and fish products. Some limitations were identified in women participation such as some cultural practices, denial to participate in decision making, poor infrastructure and lack of organised markets. Women should be encouraged to freely participate and make decision so as to enhance their finances as it will translate to enhancing the family income.
    Description: Includes:- 3 tables.;3 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Doma dam ; Women in fisheries ; freshwater environment ; Women ; Artisanal fishing ; Fishing
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  • 143
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    Marketing and transport of processed fish from Lake Kainji to southeast Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23341 | 19325 | 2018-04-08 11:26:45 | 23341 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Marketing of processed fish transported from New Bussa (Kainji Lake) to Onitsha (Southeast) was conducted by quantitative assessment at New Bussa. The packaged fish products were counted and weighed before loading into lorries. A total of one hundred and sixty eight fish traders were interviewed. The commercially important freshwater fish species traded from Kainji Lake to Onitsha were 〈i〉Alestes spp, Bagrus spp, Citharus citharus, Synodontis membranaceous, Clarias spp, Labeo spp, Oreochromis niloticus, Sarotherodon galilaeus〈/i〉 and, 〈i〉Tilapia zilli〈/i〉. The total weight of fish transported weekly from March - May 2007 ranged from 5,750Akg to 19,943.6kg and cost between N2, 688,000 to NlO, 178,000. The extrapolated annual transported fish products at the landing in New Bussa to South - East was 690.2 metric tonnes worth N329,888,004.00. These figures represent 7.5% of the published data on the total fish production in Lake Kainji. Marketing of processed fish from Kainji Lake is faced with constraints of bad road, spoilage of fish products due to improper smoking etc
    Description: Includes:- 3 tables.;14 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Kainji L. ; freshwater environment ; Marketing ; Market research ; Trade ; Processed fishery products ; Cured products ; Transport
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  • 144
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    Comparative study on the efficiency of FUTY smoking kiln and traditional smoking drum (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23347 | 19325 | 2018-04-08 11:41:40 | 23347 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Freshly caught mud catfish (Clarias anguillaris) and Tilapia (Oreochromis niloficus) collected from lake Geriyo in Adamawa state were smoked using different Kilns in order to evaluate the efficiency of the Smoking Kilns. The products from Federal university of Technology, Yola (FUTY) Improved Processor (FIP) were of better quality than the Traditional Smoking Drum (TSD). The use of these two processors revealed the profitability to fisher folks. marketers and fish farmers in the utilization of the FIP compared to the TSD as losses incurred was minimal. The qualities of the smoked Clarias anguillaris and Oreochromis niloticus were determined from their various peroxide values obtained after a 28 days storage period. The physi-cochemical parameters of the smoked samples were obtained. Products from FIP were of better quality than the TSD.
    Description: Includes:- 1 table.;1 fig.;13 refs.
    Keywords: Fisheries ; Nigeria ; Processing Fishery Products Equipment ; freshwater environment ; Processing fishery products ; Processed fishery products ; Equipment
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  • 145
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    Effects of preservatives on the proximate and sensory analysis of smoked-dried Clarias gariepinus during ambient storage (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23393 | 19325 | 2018-04-12 07:13:43 | 23393 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of food grade chemical and natural preservatives on the proximate and sensory analysis of smoked catfish Clarias gariepinus during six weeks ambient storage were determined. Eleven pre-smoking treatments were applied: 25% sodium chloride (NaCl) and 1% ascorbic acid for Iht 25% NaCI and 1% ascorbic acid for 30mins; 3% sodium lactate for 30mins; 3% sodium lactate and ginger (Zingiber officinale) extract for 30mins; 5% sorbic acid for 3Omins; 5% sorbic acid for 1h; 3% sodium lactate and Tetrapleura tetraptera extract for 30mins; 3% sodium lactate and Ethiopian pepper (Xylopia aethiopica) extract for 30mins; Z. officinale extract for 30mins; X aethiopica extract for 30mins and T. tetraptera extract for 30mins. The samples were smoked, cooled and packed for analysis at 0, 2, 4 and 6 weeks of ambient storage. The values of the proximate analysis ranged between 13.0-19.5%, 3.5-5.5%, 12.3-17.6% and 58.4-68.7% for moisture, ash, lipid and protein respectively. There were no significant change of proximate composition and sensory evaluation (p〈 0.05) within each treatment groups during the 6 weeks storage without refrigeration
    Description: Includes:- 9 figs.;7 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Lagos ; freshwater environment ; Preservatives ; Storage ; Fish storage ; Storage effects ; Cured products ; Food composition ; Nutritive value
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    Development of reservoir fisheries for sustainable fish production and food security in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23355 | 19325 | 2018-04-08 12:05:31 | 23355 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper appraised the reservoirs constructed for various purposes in Nigeria and prescribes cultured based fisheries for these water bodies to enhance their productivity in order to create employment, provide alternative source of income and food security to the rural people. In addition to discussing the concept of reservoir fisheries, its importance and pitfalls and prerequisites for its development, the paper provides a policy outline intended to promote reservoir fisheries in Nigeria.
    Description: Includes:- 8 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Reservoir fisheries ; Inland fisheries ; Lake fisheries ; Fishery management
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  • 147
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    Food borne bacterial pathogens in smoke-dried fish in Lagos markets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23395 | 19325 | 2018-04-12 07:17:16 | 23395 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Fifty samples of smoked fish were obtained from some markets in Lagos and these were analyzed for the presence of Staphylococcus aureus, Vibrio sp. and Listeria monocytogenes. All the samples tested positive for Staphylococcus aureus, 27 samples for Vibrio sp. and none for Listeria monocytogenes. This study reveals that the smoked fish sold in Lagos, could be a potential source of food borne bacterial pathogens and thus the need for improvement in processing and handling are required.
    Description: Includes:- 1 table.;17 refs.
    Keywords: Fisheries ; Health ; Nigeria ; Lagos ; freshwater environment ; Bacteria ; Pathogenic bacteria ; Cured products ; Processing fishery products
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    Potential of Tarpon (Megalops) atlanticus for sport fisheries and ecotourism development in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23399 | 19325 | 2018-04-12 07:23:17 | 23399 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The Atlantic Tarpon, Tarpon (Megalops) atlanticus is a marine fish of high commercial importance with a special fishery in western, central and south-western Atlantic Ocean where it is a very important game fish. The species provides sport fishery especially in the western Atlantic coast of America which has generated millions of dollars in tourism, employment and boat charters. Tarpon fishery in America is highly regulated and there are strict guidelines on capture, bag limits and fishing seasons. Tarpon puts up a spectacular fight when hooked, leaping up to 2-3m above water surface and landing with a smacking splash that can be heard one kilometer away. It is the leaping powers that make tarpon a favourite to anglers. In the coastal waters of south-west Nigeria especially for the natives of the coastal communities of Ondo State, T. atlanticus is a delicacy and of high economic value. Some local fishermen and fish farmers in the area stock Tarpon in their ponds purely for recreational purposes. Some of these tarpon farms were integrated with snack bars and served as tourist centres. Visitors including individuals and educational institutions frequent the fish farm during excursions and pay a stipulated fee per person as entry permit to the farm thereby generating more revenue to the farmer. This paper highlights the importance of Tarpon as a game fish and suggests strategies for development of its culture both as food fish and for ecotourism.
    Description: Includes:- 3 plates.;18 refs.
    Keywords: Fisheries ; Tarpon atlanticus ; ASE ; Nigeria Atlantic Ocean ; marine environment ; Sport fishing ; Recreation ; Tourism
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    Purse seine operations off Orimedu fish port, Lagos State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23398 | 19325 | 2018-04-12 07:21:37 | 23398 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Design characteristics and mode of operation of purse seining off Orimedu fish Port was investigated between August 2007 and February 2008.Tha fish catch composition was also analysed. The purse seine net has the highest number of bundles. The mesh size ranges from 2.5 to 05.0cm.The purse seine net was highly selective fish target specific, catching mostly coastal pelagic fish species. Ten fish species belonging to 5 families were frequently encountered. Total weight of the fish landed was 444.50kg while the average weight of the catch landed per canoe was 30.53kg respectively. Ethmalosa fimbriata (Bonga fish) and Sardinella maderensis (flat sardines) dominated the catch with 2l1.00kg (45.40%) and 143.00(32.10%) by weight of the total catch. Chloroscombrus chrysurus (Atlantic bumper fish), Caranx hippo (Crevail jack), Sphyma couardi (hammer head shark) and Carcharhinus spp.(shark) contributed between 0.33-3.47% ofthe total fish landed by weight. Total length of the fish landed also indicated that the purse seine was highly selective and does not deplete the population of sub-adult's juvenile fish species. Salinity was found to be the most variable factor affecting abundance and subsequent catch of coastal pelagic fishes particularly Ethmalosa fimbriata during the dry season. This study revealed that over fishing of fish stocks may be avoided provided the same fishing pressure observed during this study period is maintained in terms of the number of fishing crafts, number of boat days or fishing and mesh-size of the purse seine fishing gear used.
    Description: Includes:- 4 tables.;7 refs.
    Keywords: Fisheries ; Nigeria ; Orimedu Fish Port ; marine environment ; Catch statistics ; Check lists ; Species diversity ; Gear construction ; Gear research
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    Problems affecting fishers' livelihood and fisheries development in Kainji Lake Basin (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23405 | 19325 | 2018-04-12 08:56:24 | 23405 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This paper examines some critical factors related to fishers' livelihood, resource sustainability and development of fisheries sub-sector in Kainji Lake Basin (KLB). Based on empirical study the findings identified some major problems to include, lack of access to finance, deflation of resources, increase in fishers' population, extinction of some important fish species and gross lack of development activities etc. These arrays of problems form the complex nature of artisanal fisheries sub-sector, which impede substantial income generation well-being of the fishers' and development of the sector. The paper made some policy recommendations to serve as guide to relevant authorities in addressing the fishers' problems.
    Description: Includes:- 3 figs.;6 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fishery management ; Resource management ; Fishery development
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    Comparison of diploid and triploid Heterobranchus bidorsalis using Polyacryl Amide Gel Electrophoresis (N-PAGE) (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23409 | 19325 | 2018-04-12 09:02:51 | 23409 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A comparative analysis on biochemistry and Polyacryl Amide Gel Electrophresis was carried out to determine the genetic diversity of diploid and triploid Heterobranchus bidorsalis. Sixteen samples of diploid and triploid farm-raised (mean weight; 512.6g and mean length; 41.6cm) were collected and the electrophoresis analysis was conducted using 5.5% Polyacryl Amide Gel and serum protein obtained from the blood of the live samples. 0.06% Coomassie blue was used for staining the gel while a mixture of ratio 1:2 of glacial acetic acid, meethanol and distilled water was used for de-staining the gel. The diploid and triploid possessed an equal total number of 23 electrophoretic protein bands. The molecular phylogenetics of both samples revealed low genetic variability. Results of this study will serve as a baseline analysis on the current genetic diversity of H. bidorsalis in Nigeria.
    Description: Includes:- 2 figs.;8 refs.
    Keywords: Fisheries ; Heterobranchus bidorsalis ; Nigeria ; Kontagora L. ; freshwater environment ; Genetics ; Diploids ; Experimental culture ; Nutritional requirements ; Fish
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  • 152
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    Frozen and smoke-dried fish marketing in Akure metropolis (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23406 | 19325 | 2018-04-12 08:57:45 | 23406 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A survey of the prices of fish in two major markets in Akure was conducted between October and December 2008 to compare the prices of the imported fishes and that of the farmed catfishes and tilapias. The survey covered the Erekesan and NEPA markets, Akure. Both structured questionnaires and oral interview were used in data collection. The results indicated that the price of farmed catfishes was highest and that that of the tilapias was marginally lower than that of the croaker. This is evidence of better acceptability of the farmed fishes. The summary of the results showed good future for aquaculture in Nigeria, as good markets exist for the produced fishes.
    Description: Includes:- 1 table.;2 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Akure ; freshwater environment ; Marketing ; Market research ; Frozen products ; Cured products ; Dried products
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  • 153
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    Development of 2.14 M one sheet canoe (SAMPAN) for pond activities (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23416 | 19325 | 2018-04-25 19:13:12 | 23416 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 2.14 M length overall (LOA) flat bottom modern canoe (Sampan), was designed and constructed using locally available materials. The canoe features include easy construction, portability, least cost, light weight, shallow draft, and easy maneuverability. The light displacement (weight empty) was 25kg, which was less than local canoe of same size. When placed on water a draft of 5.5cm. The capacity of the canoe was 200kg, and the total production cost of N10, 000.00, ($67) which was not beyond the reach of an average fisher folks, or any fish farmer. The canoe was easily maneuvered when propelled by paddling as it floated at a shallow draft; this makes the canoe adequate for use on shallow water bodies such as ponds and reservoirs. The craft, because of its easy maneuverability, can also be used on shallow water bodies for recreational activities such as, sport fishing and canoeing.
    Description: Includes:-3 tables.;2 figs.;2 plates.;6 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; New Bussa ; freshwater environment ; Canoes ; Artisanal fishing ; Surface craft ; Boats ; Design ; Construction
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  • 154
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    Mangrove ecosystem and challenges of sustainable fish production in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23369 | 19325 | 2018-04-08 18:10:00 | 23369 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Nigeria has vast expanse of mangrove ecosystem of about 1 million ha. Presently the total fish production from the artisanal, industrial, and aquaculture sectors is above 635,370 metric tonnes (mt) annually. The current fish demand in Nigeria is 1.66 mt hence leaving a deficit of about 1 mt which translates to about $1.6 billion on importation. Meanwhile, it has been estimated that if only 30-35% of the available mangrove areas suitable for aquaculture is fully harnessed, that the country has the potential to produce over 3 mt of fish annually from the sector. This means that Nigeria will be in a position to produce enough fish for the population and be export orientated too. The paper presents the challenges that militate against sustainable fish production in the mangrove ecosystems and the solutions for improved production.
    Description: Includes:- 1 table.;5 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Mangrove Ecosytems ; freshwater environment ; Mangroves ; Fishery management ; Mangrove swamps ; Ecology
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  • 155
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    Effects of bait types on fish congregation and catch efficiency of castnet in Lake Kainji (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23372 | 19325 | 2018-04-10 16:08:03 | 23372 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of baits, rice bran (Oryza sativa L.) and corn bran (Zea mays L.) on fish aggregation and catch efficiency of castnet in Lake Kainji was conducted. 25.4mm stretched mesh size multifilament (PA) nylon net was used for the construction of castnet. The experiment was Complete Randomized Design (CRD) with three replications for nineteen consecutive fishing days. Three treatments were employed; castnetting after baiting with rice bran, with corn bran, and castneting without bait (control). Thirteen fish species were caught from eight families. The number of fish caught was 336, of which 48.5 and 27.1 % were caught with corn bran and without bait while castnetting with rice bran recorded the least (24.4%). The biomass of fish caught was 4627.7g (4.6kg) of which the highest percentages 51.4 and 28.6% followed same trend as that of number of fish caught. Comparison of the overall number and biomass of fish capture indicated that Tilapia zillii ranked highest, followed by Citharinus citharus and Hydrocynus forskalii.
    Description: Includes:- 2 tables.;10 refs.
    Keywords: Fisheries ; Nigeria ; kainji L. ; Bait ; Catch/effort ; Catching methods ; Cast nets ; Fishing gear ; Gear research
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  • 156
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    Attitude of fisher folks towards adoption of extension activities in lower Kainji Lake Basin (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23390 | 19325 | 2018-04-12 07:06:26 | 23390 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study examined the attitude of fishermen towards extension activities in the lower Kainji Lake Basin, Niger State. Simple random sampling technique was used to select five fishing villages from which 100 fishermen were drawn for the study. Structured questionnaire was developed in lined with the objectives to obtain information from respondents. Data collected were analyzed using frequencies and % counts. Majority (52%) of the fishermen was in their prime age and 57% had completed one formal education or the other. It also indicated that 67% had 〉20 years experience in fishing activities, 40% use gill nets that gave 95% of respondents fishing gear maintenance job. About 64% of respondents reported irregular extension visits though 72% perceived extension service to be useful and that information on fisheries were obtained from the research institute (57%) which enhanced the income of 65% of the fisherfolks. Recommendations were made on how to enhance extension delivery and adoption in the lake.
    Description: Includes:- 6 tables.;6 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; kainji L. ; Extension Services ; freshwater environment ; Technology transfer ; Information services ; Fishermen
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    Effects of square mesh bunt on by-catch reduction in white shrimp Nematopalaemon hastatus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23397 | 19325 | 2018-04-12 07:20:09 | 23397 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Simultaneous paired fishing comparison of modified codend against conventional codend was done with shrimp beam trawl in near shore sea off Lagos.The modified codend was designed to reduce by-catch and was made by incorporating square mesh panel at anterior bunt. Results showed that the square mesh codend significantly reduced the by-catch of juvenile fishes up to 39.35% (T-test, P 〈 0.05; 0.01) with no significant loss (2.9%) in the quantity of the target shrimps Nematopalaemon hastatus (P 〉 0.05; 0.01). Commercially important by-catch species having a total length of 11-30cm were retained by the square mesh codend, while those with total length of 4-10cm were reduced eg; Pseudotolithus elongatus (43.96%, P 〈 0.05, 0.01), P. senegalensis (49.03%, P 〈 0.05; 0.01), P. typus (36.29%, P〈 0.05; 0.01), llisha africana (39.09%, P〈 0.05; 0.01), Pentanemus quinquarius (41.02%, P〈 0.05; 0.01), Galeoides decadactylus (48.80%, P〈 0.05; 0.01), Lutjanus dentatus (48.98%, P〈 0.05; 0.01), Drepane africana (43.13%, P〈 .0.5;0. 01), Chloroscombrus chrysurus (55.29%, P〈 0.05; 0.01), and Selene dosalis (34.60%, P〈 0.05; 0.01). At family level, reduction in the number of 8 out of 13 important by-catch families analyzed were significant, e.g.; Clupeidae, Trichiuridae, Sciaenidae, Serranidae, Polynemidae, Carangidae and Lutjanidae (P〈 0.05; 0.01). The number of flattened fishes (Cynoglossus senegalensis), Spinous fishes (Arius latiscutatus), shell fishes with morphometric body protection (Callinectes amnicola) were not significantly reduced (P〉 0.05).
    Description: Includes:- 3 tables.;3 figs.;21 refs.
    Keywords: Fisheries ; Nematopalaemon hastatus ; Nigeria ; Lagos ; marine environment ; By catch ; Fishing gear ; Shrimp fisheries ; Gear selectivity
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    Crab value chain in Lagos Lagoon complex: implications for food security in a recession economy (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23396 | 19325 | 2018-04-12 07:18:42 | 23396 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study aims at bridging the knowledge gap in respect of production and marketing of crab fisheries in Lagos lagoon complex of Lagos State, Nigeria. The data have been collated through specific survey carried out between August 2008 and April 2009 in each of the five lagoon systems of Lagos State including Badagry, Ologe, Lagos, Epe and Lekki lagoon. The production systems and targeted clientele of each lagoon differ greatly. The profit margin per unit weight retained at each stage of transaction was relatively low. The crab fishery was observed to be economically viable because of the large turnover and small size of individual operations. The crabs plays significant role in the livelihood of the fisher folks and are very important as export commodity in West Africa.
    Description: Includes:- 4 tables.;7 refs.
    Keywords: Biology ; Fisheries ; Nigeria ; Lagos Lagoons ; freshwater environment ; Marketing ; Crab fisheries
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  • 159
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    Effects of diesel-oil spillage of fresh, brackish and marine waters on polyvinyl-alcohol (PVA) synthetic fishing twine (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24184 | 19325 | 2018-05-16 14:38:37 | 24184 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of diesel-oil spillage of fresh (0.4ppt), brackish (25ppt) and marine (37ppt) waters on elongation (cm) and breaking load (kgf) of artisanal PVA synthetic twine of varied diameter (4mm, 6mm, 8mm and 10mm) soaked for 16 weeks was studied. Chemical (solubility) test was carried out to identify the experimental twine as PVA among other synthetic twines. The elongation (cm) and breaking load (kgt) of PVA twine diameters were tested by tensile-strength gauge machine (0-200kg) and was carried out in unpolluted (control) and polluted states (spillage level) at 0%, 20%, 40%, 60%, 80% and 100% diesel-oil concentrations of different water salinity. Factorial statistics was used to analyze the treatments; twine (at four levels), water salinity (at three levels) and concentrations (at six levels). This implies 4 by 3 by 6, replicated in four places (288 treatments). Results indicated that elongation (cm) and breaking load (kg) of the specimens were significantly (P〈0.05) influenced by twine thickness. Twine l0mm soaked in 3.0 litres of unpolluted freshwater had significant (p〈0.5) correlation coefficient r,0.927 and lowest r- value of 0.499 was obtained in twine 4mm soaked in 100% diesel-oil concentration. Significant (P 〈0.05) relationships were observed between the correlation coefficient r = 0.531-0.927 for unpolluted and r = 0.499-0.592 for polluted tests. The study revealed that diesel-oil spillage had negative effects on the quality of twines. The thicker the PVA twine diameters (10, 8, 6 and 4mm) at lowered (0%, 20%, 40%,60%,80% & 100%) diesel-oil spillage of fresh (0.4ppt), Brackish (25ppt) and Marine (37ppt) waters respectively, the higher the significant (P〈0.05) elongation (cm) and breaking load (kgt) were evaluated in most cases.
    Description: Includes: 4 tables.;Also includes: 12 references.
    Keywords: Conservation ; Fisheries ; Nigeria ; Ogun State ; Diesel-Oil ; PVA synthetic fishing twine ; Freshwater ; Brackishwater ; Marine water ; brackishwater environment ; freshwater environment ; marine environment ; Fuels ; Crude oil ; Synthetic fibres ; Yarns ; Saline water ; Fresh water ; Brackish water ; Netting materials ; Gear research ; Tensile strength ; Materials testing ; Comparative studies
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  • 160
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    Effects of NIOMR smoking kiln and oven on the crude protein, minerals and vitamins of catfish Clarias gariepinus (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24197 | 19325 | 2018-05-16 15:16:21 | 24197 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of two different preservative methods, NIOMR Smoking Kiln and Oven drying on Crude Protein minerals and Vitamin of clarias gariepinus were studied. Clarias gariepinus were obtained from the fish farm of African Regional Aquaculture Centre, Aluu, Port Harcourt. The crude protein, minerals and vitamins of the fresh fish were determined immediately while two other batches were separately dried using oven at 50~'C for 30minutes and NIOMR Smoking Kiln at 70~'C for 3 hours. Result of the crude protien of fresh fish was 21.84 ~c 1.10 which increased to 59.53 ~c 1.88 and 35.41 ~c 1.00 in both NIOMR smoking and oven, respectively. This means that, there was a significant different in both dryers on the crude protein. This will improve the knowledge and capacity of rural women and agricultural communities on the appropriate processing method for fish. The mineral and vitamins of oven dried and NIOMR Smoking kiln were analyzed. The vitamin content of both the fish, dried and smoking kiln shows no significant different except in vitamin A which was significant (p〈0.05).There was significant different (p〈0.05) in the mineral content of the two different drying method except in sodium, Potassium and Phosphorus of the drying method. This result indicates that the two drying methods have effects on the nutritional quality of catfish.
    Description: Includes: 2 tables and 1 figure.;Also includes: 7 references.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Port Harcourt ; Smoking ; Production ; Preservative research ; Quality ; freshwater environment ; Processing fishery products ; Freshwater fish ; Proteins ; Vitamins ; Minerals ; Cured products ; Quality assurance ; Aquaculture equipment ; Nutritive value ; Drying ; Methodology ; Comparative studies
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    Fatty-acid composition of Macrobrachium vollenhovenii in Ogun estuary, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24200 | 19325 | 2018-05-16 15:22:08 | 24200 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was carried out on the fatty-acid composition of Macrobrachium vollenhovenii (African river prawn) in Ogun estuary, Ogun State, Nigeria. Sexes and size groups were considered during the study. Fatty-acid analysis was done in triplicates and data obtained were analyzed using descriptive statistics, analysis of variance and Duncan's multiple range tests. Fatty acids analysed which included oleic acid, linoleic acid,' stearic acid, myristic acid, palmitic acid and lauric acid were classified into saturated and monounsaturated fatty acids. All values of saturated fatty acids were higher in female (29.64%) than in male (25.50%) p〈 0.05. So also the monounsaturated fatty acid also showed higher value in female (29.64%) than in male (25.50%). All fatty- acid values were higher in female M. vollenhovenii than in male. Meanwhile, myristic acid was highest in the two sexes and the combined sexes, (35.68% female), (33.14% male) and (34.74% combined sexes). The fatty-acid components were not influenced by the size of the fish. This study clearly indicated that the nutritive value of M. vollenhovenii is quite well comparable to the edible species of decapods already studied (shrimps, prawns and lobsters) and could be included in both human and livestock diets.
    Description: Includes: 2 tables and 1 figure.;Also includes: 10 references.
    Keywords: Fisheries ; Macrobrachium vollenhovenii ; Nigeria ; Ogun Estuary ; Fatty ; Composition ; Macrobrachium ; Ogun ; Estuary ; freshwater environment ; Shrimp fisheries ; Acidity ; Fatty acids ; Estuarine fisheries ; Chemical composition ; Nutritive value ; Sex ratio ; Males ; Females ; Freshwater crustaceans ; Human food ; Feed
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  • 162
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    Gut contents and feeding pattern of Macrobrachium vollenhovenii (Herklots, 1857) and Caridina africana (Kingsley, 1882) at Asejire Lake and Erin-Ijesa waterfalls, South Western Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24207 | 19325 | 2018-05-19 06:38:21 | 24207 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study with intent towards acculturation was carried out on the gut conients and feeding patterns of Macrobrachium vollenhovenii and Caridina africana occurring at Asejire lake and Erin-Ijesa Waterfalls respectively for two years using numerical abundance and frequency of occurrence methods of analysis. There was a strong correlation (p〈0.05) between prawn abundance and food availability, The gut content analysis of M. vollenhovenii revealed that juveniles were predominantly zooplanktivorous, feeding on copepods and rotifers while the adults were omnivorous, utilizing a wider variety of animal foods than plant materials. This changing of diets and patterns as the species advances in age has an implication for its culture potentials. Stomach fullness index was high during the wet season which coincided with high abundance of prawns, C. africana fed mainly on diatoms, zooplankton and other micro-phytoplankton, thus an onmivore with herbivorous tendency. The availability of both species in fresh water bodies and their foods revealed that both species can be cultured in earthen ponds since their unspecialized flexible dietary habit is an optimal strategy for sustained productivity.
    Description: Includes: 3 tables and 1 figure.;Also includes: 12 references.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Macrobrachium vollenhovenii ; Caridina africana ; Nigeria ; Asejire L. ; Nigeria ; Erin-Ijesha waterfalls ; Macrobrachium vollenhovenii ; Caridina fricana ; Gut content ; Accumulation ; Asejire Lake ; Waterfalls ; freshwater environment ; Shrimp fisheries ; Lake fisheries ; Animal nutrition ; Abundance ; Frequency ; Food availability ; Zooplankton ; Stomach content ; Breeding ponds ; Shrimp culture ; Food organisms ; Feeding behaviour
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    Effects of freezing on the proximate composition and sensory quality of stored African catfish (Clarias gariepinus) and tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24189 | 19325 | 2018-05-16 14:59:40 | 24189 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The objective of this study was to determine the quality deterioration of African catfish Clarias gariepinus and Tilapia, Orechromis niloticus stored at-4~'C for 8 weeks. Weekly analysis was conducted to measure protein, moisture, crude fat and ash content and evaluation of the sensory quality. The result clearly reveals that during storage, both the samples showed a highly significant (p〈0.05) decreasing trend in protein, lipid, ash and moisture content. The result shows that protein, moisture, fat and ash content of the fish samples decreases with increasing duration of frozen storage. The fresh samples has the highest value of protein, moisture, fat and ash content while the least value was recorded on the 8th week. 19.98 ~c 2.66%, 80.71 ~c 1.65%, 3.92 ~c 0.5% and 2.52 ~c were recorded for freshly prepared Clarias gariepinus respectively while 12.62 ~c 1.22%, 66.86 ~c 0.68%, 1.08 ~c 1.04% and 1.14 ~c 0.33% were recorded on the 8th week respectively. 20.80 ~c 1.46, 60.75 ~c 2.50, 9.75 ~c 2.50% and 5.85 ~c 2.51% were recorded for freshly prepared Oreochromis niloticus respectively while 25.05 ~c 2.20%, 47.60 ~c 2. 15%, 7.1 ~c 0.20 and 3.00 ~c 2.10% were recorded on the 8th week respectively. After 8 weeks, the total decrease was 7.36%, 13.85%, 2.84% and 1.38% respectively for Clarias gariepinus and 3.75%, 13.45%, 2.65% and 2.85% respectively for Oreochromis niloticus. Sensory evaluation of the fish samples revealed that quality, texture, colour, odour, aroma and taste decrease with increasing duration of storage and best quality obtained when freshly prepared.
    Description: Includes: 4 tables.;Also includes: 11 references
    Keywords: Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Owo ; Frozen ; Fish ; Quality ; Sensory ; Evaluation ; Processing ; freshwater environment ; Chemical composition ; Freshwater fish ; Receptors ; Deterioration ; Quality assurance ; Fish storage ; Freezing storage ; Nutritive value ; Microorganisms ; Enzymatic activity ; Processing fishery products ; Storage effects ; Organoleptic properties ; Temperature effects
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  • 164
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    Toxicity of oil-based drilling mud (OBM) on the survival of the fingerlings of Niger Delta mudskipper, Periophthalmus papilio (Boch and Schneider, 1801) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24221 | 19325 | 2018-05-19 07:04:22 | 24221 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The toxicity of oil - based drilling mud on the survival of the fingerlings of Niger Delta mudskipper, Periophthalmus papilio were studied using static plastic tanks. The exposure period lasted for 96 hours. Lethal concentration (LC50) and lethal time (LT50) were determined. The control tanks contained no oil- based drilling mud. Results revealed increased in mortality values of the fish to all lethal concentrations. There was no mortality observed in the control tank. The oil- based drilling mud were toxic on Periopthalmus papilio.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Pollution ; Periophthalmus papilio ; Nigeria ; Rumuche River ; Drilling fluid ; Mortality ; Lethal concentration (LCsub50/sub) ; Bioassay ; freshwater environment ; Toxicity ; Drilling platforms ; Drilling ; Mud ; Fingerlings ; Freshwater fish ; Survival ; Pollution effects ; Mortality ; Lethal effects ; Drilling fluids ; Experimental research ; Toxicity tests
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  • 165
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    Trace metals in water, fish and sediments from Elechi Creek, Port Harcourt, River State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24220 | 19325 | 2018-05-19 07:02:08 | 24220 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The concentration of trace metals: Cadmium (Cd), Lead (Pb), magnesium (Mn), Nickel (Ni) and Zinc (Zn) were determined in water, sediment and fish tissues (S. melanotheron) collected from Elechi creek in Port Harcourt, Nigeria between October and November, 2010. The overall mean concentrations of the trace metals (Mg/g dry weight) in all combined samples ranged from 0.06-0.24 (Cd), 0.59-2.39 (Pb), 0.08-1.15 (Mn), 0.15-0.48 (Ni) and 0.18-7.04 (Zn) respectively. The concentration of the trace metals in water, fish and sediments were in the following order: Pb 〉Ni 〉Zn〉Cd 〉Mn; Zn〉Pb 〉Mn〉Ni 〉Cd and Zn〉 Pb〉Mn〉Ni〉Cd respectively. Except in water, Zinc had the highest value while cadmium had the lowest value. Mn concentration in fish tissue was greater than WHO/FAO certified values. Correlation coefficients between pairs of metals concentration show that all metals positively correlate except Cadmium and Nickel. Elechi creek is not heavily burdened with metals, but aquatic environment should be monitored periodically to avoid excessive intake of trace metals by human.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Limnology ; Pollution ; Sarotherodon melanotheron ; Nigeria ; Elechi Creek ; Trace metals ; Elechi Creeks ; S. Melanotheron ; Sediments ; brackishwater environment ; Trace metals ; Pollutants ; Pollution effects ; Pollution monitoring ; Water analysis ; Brackishwater fish ; Sediment pollution ; Brackishwater pollution ; Heavy metals ; Lead ; Cadmium ; Zinc ; Nickel ; Magnesium
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  • 166
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    Microbiological status of water and fish samples from Jabi Lake, Abuja (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24224 | 19325 | 2018-05-19 07:11:26 | 24224 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Jabi Lake is a natural water body in Abuja Federal Capital Territory (FCT). It was expanded for commercial fishing following relocation of Nigeria's headquarters to Abuja in 1993. Quantitative analysis of microbiological status of water and fish from the Lake was carried out. Samples were collected from the dam site, open water, middle lake and inlet. Result reveal that total coliform count which are indicators of pollution are high (2.0 x 103 cfu/ml, 1.1 x 103 cfu/ml, 1.0 x 103 cfu/ml and 1.1 x 103 cfu/ml for dam site, open water, middle lake, and inlet respectively). Total viable count too is high (9.2 x 103 cfu/ml, 4.9 x 103 cfu/ml, 4.6 x 103 cfu/ml and 4.9 x 103 cfu/ml for dam site, open water, middle lake and inlet respectively). There are no coliform bacteria in the muscle of the fish. High bacterial load is an indication of biological pollution and these calls for restraint on the side of those who are using the lake as site for refuse dump.
    Description: Includes: 10 references.
    Keywords: Fisheries ; Pollution ; Nigeria ; Jabi Lake ; Jabi lake ; Water ; Fish ; Bacteria ; freshwater environment ; Microbiology ; Fish ; Pollution ; Water pollution ; Lake fisheries ; Fishery surveys ; Bacteria ; Baseline studies ; Water sampling ; Microbial contamination ; Muscles ; Freshwater fish ; Pollution surveys ; Water analysis ; Freshwater pollution
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  • 167
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    Solar drying: an alternative to fish drying - a review (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24198 | 19325 | 2018-05-16 15:18:03 | 24198 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Energy is one of the main concerns for the future development of any nation. It is by far the largest merchandise in the world and an enormous amount of it is extracted, distributed, converted and consumed in our global society daily .One major problem regarding agricultural produce is related to the product storage in the harvesting season, and identifying an alternative to marketing fresh produce. A useful option is to prevent wastage of produce by drying, using solar energy. In this regard, solar dryer for domestic as welI as industrial usage could be an effective alternative of saving conventional energy. Utilization of solar thermal energy through solar dryer is relatively in a nascent state in our country. This paper gives a description of the efforts made under several researches to design and develop some types of solar dryers.
    Description: Includes: 23 references.
    Keywords: Fisheries ; Environment ; Nigeria ; Makurdi ; Solar drying ; Dryres ; Drying methods ; Drying system ; Solar dryer ; freshwater environment ; Drying ; Fishery products ; Energy ; Processing fishery products ; Utilization ; Storage ; Aquaculture equipment ; Conservation
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  • 168
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    Shrimp by-catch species from industrial shrimp trawl fisheries in Lagos, Nigeria coastal waters (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24199 | 19325 | 2018-05-16 15:19:23 | 24199 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A fisheries-dependent surveys was conducted to identify and quantify the species composition of shrimp by-catch and its effect on fishery sustainability. Samples were bought monthly, from October 2009 to June 2010 from landings site, at Apapa-Liverpool market Lagos. 25 fish species belonging to 18 families targeted in other inshore fisheries constituted the by-catch species. The percent of weight compositions of some economically important by-catch species were: Pseudotolithus senegalensis (5.76%),Ilisha africana (14.65%), Pentanemus quinquarius (2.94%), Pteriscion peli (6.60%), Galeoides decadactylus (3.17%), Cynoglossus senegalens is (6.76%) and Chloroscombrus chysurus (10.81%). About 80% of the shrimp by-catch species were juvenile fin fish. However, continuous harvest without appropriate mitigating measures poses a threat to sustainability of coastal capture fisheries. Recommendations are proffered in order to conserve the resources for sustainable development.
    Description: Includes: 1 table.;Also includes: 8 references.
    Keywords: Fisheries ; Pseudotolithus senegalensis ; Ilisha africana ; Pentanemus quinquarius ; Galeoides decadactylus ; Cynoglossus senegalensis ; Chloroscombrus chysurus ; ASE ; Nigeria ; Lagos Lagoon ; By-catch ; Coastal ; Shrimp trawl ; Fisheries ; Industry ; marine environment ; Shrimp fisheries ; Fishery surveys ; By catch ; Check lists ; Sustainability ; Resource conservation ; Trawl nets ; Coastal fisheries ; Artisanal fishing
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  • 169
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    Fisheries and tourism potentials of Agbokim waterfalls, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24196 | 19325 | 2018-05-16 15:14:22 | 24196 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Human activities in natural environments are among the most important recreational needs. Monthly studies of tourism characteristics was conducted during wet and dry seasons, over a two year period in the three landscapes along the 6817.7m length of Agbokim waterfalls by using a close-ended pre-coded survey instrument. Through MANOVA analysis of the 1780 respondents, we found strong positive association between peoples visits to the recreational areas and the type of landscape in which the respondents felt happy. People who felt happier in landscape dominated by waterfalls, visit the middle reaches of the river for outdoor recreation more often, while people who feel happy in landscapes dominated by slow water current with an extensive wide area and floodplains, visit downstream reaches of the waterfalls more often. Activities performed more often along downstream reaches include fishing, bathing/swimming, boating and hunting while more frequent activities in the middle reaches (waterfalls) include taking photographs, picnics, enjoying nature, outing with family and friends, looking at view, resting and relaxing.
    Description: Includes: 1 table.;Also includes: 18 references.
    Keywords: Fisheries ; Law ; Nigeria ; Cross River ; Agbokim waterfalls ; Fishing activities ; Recreational activities ; Landscape ; Waterfalls ; freshwater environment ; Fisheries ; Tourism ; Recreation ; Water bodies ; Surveying equipment ; Seasonal variations ; Bathing ; Current observations ; Fishing ; Sociological aspects
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  • 170
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    Prevalence of Camallanus cotti in Poecilia reticulata obtained from some waste water drains in Lagos State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24239 | 19325 | 2018-05-20 05:29:09 | 24239 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One way to diversify Nigeria's economy is to improve on agricultural activities with low import input but high export potential such as the promotion of the ornamental fish industry. Poecilia reticulata is one such fish species that enjoys international acceptability. However, a potential bottleneck in its international trade is the decertification of exports from Nigeria in the uncertainty of standing parasite fauna of locally available stock of Poecilia reticulata. Four Streets in different local government areas of Lagos State were identified with existing populations of P. reticulata where collection of samples with a scoop net was done before sorting into 60 male and 60 female individuals per wastewater drain from each Street was carried out monthly between March, 2004 and February, 2005. Temperature, pH, Dissolved Oxygen (DO), water transparency and drain depth were measured with mercury-bulb thermometer, ARH-l CE electronic meter, Oxyguard electronic probe, secchi disc and calibrated pole respectively. Chi-square was used to test for sex-related differences in prevalence and ANOVA for differences in physicochemical analyses. Only 3.4% of the 4,320 samples examined were infected with C. cotti. There was no sex-related differences in the prevalence of C. cotti while only Dissolved oxygen (DO), transparency and drain depth were found to be significantly different among the wastewater drains on the four Streets. The highest prevalence of 15.0% was obtained in P. reticulata females obtained from Igi-Olugbin and Adenaike Alagbe Streets in September, 2004. High prevalence clustering, correlated with receding rains. However, mean monthly temperature, transparency and drain depth were significantly different across drain (p〈0.05). P. reticulata obtained from these four Streets can be further exploited for import substitution and export market since this prevalence level can be managed and does not rival records of C. cotti in other popular export sources in Asia.
    Description: Includes: 11 references.
    Keywords: Ecology ; Fisheries ; Health ; Poecilia reticulata ; Camallanus cotti ; Nigeria ; Lagos State ; Poecilia reticulata ; freshwater environment ; Ornamental fish ; Fishery industry ; Fish ; Waste water ; Exploitation ; Trade ; Comparative studies ; Shellfish ; Parasite control ; Endoparasites ; Parasitic diseases ; Freshwater pollution ; Drainage water
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  • 171
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    The comparative histological studies of the testis in the wild and cultured African catfish species (Clarias gariepinus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24211 | 19325 | 2018-05-19 06:44:45 | 24211 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The comparative study of the structure of testes of both the cultured and wild Male Clarias species was carried out with the aim of highlighting the possible differences in the testicular structure between them. The data were analysed based on the Regression and Correlation Analysis to examine the relationship between and within the data using Microsoft Excel data analysis tool. The Samples of the testes were fixed in Bouin's fluid for 72 hours. The tissue samples were passed through graded concentrations of alcohol at 50%, 70%, 90%, and absolute alcohol (100%) in order to achieve dehydration. The tissues were cleared in two jars of xylene for one hour and then embedded after passing through the four changes of paraffin wax at 60~'C. Paraffin sections of 5. Micron thick were obtained on a microtome. These were mounted on clear albuminized slides after floating on a warm water bath and then dried in an oven and stained with Haematoxylin and Eosin (H & E). At the same time, some of the cut sections of the testes were stained with Periodic Acid Schiff (PAS) reagents. All the slides were examined under the light microscope. On the slides stained with H&E and PAS, the histological features of the testis were evaluated and the histomorphometry of the testes determined. The findings of this work showed that there was no histological difference in the testicular structure of both domestically reared and wild strains of Clarias gariepinus species. At the end of the experiment, this work showed that testicular structure of Clarias gariepinus in the cultured and the wild are histologically similar.
    Description: Includes: 12 references.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Ogun State ; Cultured ; Sexually gravid ; Histology ; Clarias gariepinus ; Testicule ; freshwater environment ; Freshwater fish ; Testes ; Males ; Comparative studies ; Histology ; Fish culture ; Stocks ; Cultured organisms
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  • 172
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    Water quality and growth performance of Oreochromis niloticus under integration with mallard and muscovy ducks (2021)
    FISON | Lagos (Nigreia)
    In:  http://aquaticcommons.org/id/eprint/24575 | 19325 | 2018-05-20 05:51:39 | 24575 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted to evaluate the effect of duck manure and spilled duvk weed on water quality and production of Oreochromis niloticus in an intigrated system utilizing two loacl duck weed breeds. Treatment 1 (T1) consist of fish (mean weight, 20.7 ~c 1.28g) stocked at a density of 5 fish/m2 pond and integrated with 12 mallard ducks (Anas platyrhynchas); treatment 2 (T2) consist of fish (mean weight, 21.86 ~c 0.93g) stocked at a density of 5 fish/m2 pon and integrated with 12 Muscovy ducks (Cairina moschata) with treatment 3 (T3) was the control (72m2 fish pond without integration). Fish with treatment two was fed compounded feed of 30% crude protein content three times daily while those in T1, T2 fed on duck manure and spilled duck feed (15% crude protein content). Water quality parameter of the fish pond, growth parameters of the fish and duck were monitored. After a 12-week experimental period, mean weight gain of fish were 140.68, 122.11 and 157.19g in T1, T2 and T3 respectively, while percentage survival was high in T3 and lower in T2. Water quality parameter was generally favorable for fish growth in the treatment. Mallard ducks are recommended for the duck-fish system since they perform better than Muscovey duck both in survivability and ability to engender fish growth.
    Description: Includes: 17 references.
    Keywords: Pollution ; Aquaculture ; Oreochromis niloticus ; Nigeria ; Oreochromis niloticus ; Muscovey ; Integration ; Water quality ; freshwater environment ; automation
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  • 173
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    Threats to fish biodiversity conservation in Echara River, Ebonyi State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24111 | 19325 | 2018-05-16 14:20:32 | 24111 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study on threats to fish species conservation in Echara River, Nigeria was carried out from September 2009 to February 2011 to generate inferential data for Fisheries policy formulations to assess the potential of the Fishery to alleviate malnutrition among the poor in the rural communities, and use of the living resources for teaching and research. A total number of 709 fishes comprising of Fin-fishes and shell-fishes belonging to 13 families, 19 genera and 40 species were caught in 216 fishing efforts, at 10 days interval using hooks and lines (size 13), cast nets, gill nets and traps of mesh sizes of 50mm, 75mm and l00mm respectively. Fish identification was done using taxonomic keys. Evaluation of fishing methods of the Artisans within the basin was by visual survey and the use of structured questionnaires. It was observed that during the dry season, 55% of artisanal Fishers used obnoxious methods to catch fish, ranging from chemical toxicants (14%), unselective Fishing gears (35%) and direct draining (6%). It was concluded that there is an urgent need for monitoring the impacts of human activities on freshwater systems and to evolve appropriate implementable management strategies, backed up by political will to check anthropogenic impacts that have deleterious effects on the fishery.
    Description: Includes: 2 figures and 1 plate;Also includes: 8 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Ebonyi R. ; freshwater environment ; Fish ; Biodiversity ; Conservation ; Inland water environment ; Taxonomy ; Identification ; Species ; Catching methods ; Evaluation ; Artisanal fishing ; Collisions ; Overexploitation ; Pollution ; Climatic changes ; Fishery surveys ; Fishery policy
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  • 174
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    The status of shrimp (Penaeus monodon) and prawn (Macrobrachium vollenhovenii) farming in Cross River State, Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24110 | 19325 | 2018-05-16 14:17:24 | 24110 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A survey on the status of shrimp and prawn farming in Cross river state was carried out in March, 2011. The survey was conducted using structured questionnaires and visits to potential sites. Data obtained through the analysis of the questionnaires indicated that seventy seven percent (77%) of the respondents were within the age bracket of 2l-50 years which fell within the active age while ten percent (10%) of the respondents were above 60 years. The educational background of the respondents showed that forty percent (40%) had tertiary education, 5.7% had technical education, 28.5% secondary education and 11.4% had primary education. The survey revealed that there was no shrimp or prawn farming in the state at the time of visit. Majority of the shrimp production activities were mainly from the capture fisheries, including both artisanal and industrial fisheries. A number of fisher folk interviewed were very enthusiastic to venture into shrimp and prawn farming if the technology for the propagation of the species were made available to them. Successful development of shrimp/prawn culture technology and dissemination will enhance aquaculture production of the species thereby creating employment opportunities and alleviating poverty.
    Description: Includes: 3 tables and 3 figures;Also includes: 7 refs.
    Keywords: Aquaculture ; Fisheries ; Penaeus monodon ; Macrobrachium vollenhovenii ; Nigeria ; Cross River ; Status ; Shrimp ; Prawn ; Culture ; Cross river state ; marine environment ; Shrimp culture ; Prawn culture ; Aquaculture products ; Artisanal fishing ; Fishery surveys
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  • 175
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    The nature of fishing community in Nigeria: a case study of Itowolo fishing community, Lagos (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24109 | 19325 | 2018-05-16 14:11:01 | 24109 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Itowolo is a fishing village being boarded with Lagos lagoon on nearly every side except the southern part which opened to the Ikorodu road from Mile 12 part of Agboyi - Ketu Local Council Development Area. During the raining season, the water level increases which possibly cause flood at heavy down pour while low water level of higher salinity during the dry season. The indigenes are primarily fisherfolks and they are effective in their fishing activities by having individual functional canoe ranging from small unmotorised paddled dugout type to outboard ones. The main gears used for fishing in the area are cast nets, gill nets, traps, hooks and lines among which cast net is prominently used Their landings during the raining season involve different species of fishes such as Heterobranchus species, Heterotis species, Channa species including others while tilapia of different species take the greatest percentage of their catches during the dry season. The shrimps top the population of catches between the months of July September. The dwellers during off fishing season engage in other economic activities that generate income such as petty trading, palm tapping, fuel wood trading, transport business, mat making, hairdressing, fashion designing, computer business centres and telecommunication vendors. In general, fishing activities are characterized by low unit productivity, intensive labour, relative low capital, low operational costs and limited gear coverage. High post harvest losses are usually experienced due to lack of suitable storage facilities which eventually lead to relative low profit.
    Description: Includes: 3 tables and 3 figures;Also includes : 5 refs,
    Keywords: Fisheries ; Sociology ; Nigeria ; Fishing communities ; Fishing household and change ; Artisanal fishing ; Fishing vessels ; Fishing gear ; Cast nets ; Fish ; Catch statistics
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  • 176
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    Assessment of water quality parameters and trace metal contents of drinking water sources in Minna, Niger State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24615 | 19325 | 2018-05-22 06:05:28 | 24615 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study assessed the physico-chemical parameters and heavy metal concentration of tap and borehole water in Minna metropolis. The experiment lasted over a period of three months from May to July 2012. Six (6) locations were identified within Minna metropolis, Bosso, Kpagungu, Chanchaga, Mobil, Maitumbi, and Tunga where water samples were randomly taken once every month. Hydrogen ions concentration, chloride, Sodium and Potassium were determined by the method of American Public Health Association (1995), while temperature was measured with thermometer. Air and Water temperature were determined in situ, while Hyd rogen ions concenration (pH), Ionic conductivity, Alkalinity, Hardness, Chloride, Sodium, Potassium and Heavy Metal concentration, copper, zinc, and Lead were determined in the laboratory. The parameters measured showed marked variation across months and locations. values of physico-chemical and concentration of heavy metals in Tap and Borehole water variables studied showed that parameter measured, fell within the recommended ranges for aquaculture and drinking water. Water temperature showed significant difference (p〈0.05), while conductivity, hardness, alkalinity, sodium and potassium showed no significant difference (p〉0.05) amongst the months. The physico-chemical parameters assessed, indicated that most of the parameters fell within standards set by the Federal Ministry of Environment. Comparison between tap and borehole water of each location in Minna metropolis did not show significant difference in temperatures of the locations (p〉0.05). However, significant difference was observed in conductivity of the various locations (p〈0.05).
    Description: Includes: 12 references.
    Keywords: Health ; Pollution ; Nigeria ; Water quality parameter ; Trace metal ; Minna metropolis ; freshwater environment ; automation
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    Length-weight relationships of Hyperopisus bebe occidentalis in Zaria Dam (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24631 | 19325 | 2018-05-22 06:33:31 | 24631 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The morphometric parameters of 54 Hyperopisus hebe occidentalis obtained from Zaria Dam were investigated. The length occidentalis examined ranged from 18.9-41.0 cm and weight ranged from 25-425g, the largest male weighed 175g while the female was 425g. The length-weight relationship of H. Bebe occidentalis in Zaria showed a positive correlation (r=0.897) in both regression exponent (b〉3) for both sexes showed positive allometric growth pattern. The mean condition factor obtained (0.95- 1.26). In both sexes, the condition factor generally increased with increase in individual size of the fish irrespective of sex but slightly in male than female.
    Description: Includes: 13 references.
    Keywords: Ecology ; Fisheries ; Hyperopisus bebe ; Nigeria ; Zaria Dam ; Microbiological ; Proximate analysis ; Biochemical characterization ; S. nigrita ; Mormyruss ; C nigrodigitatus ; freshwater environment ; automation
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    Comparison of microbiological and proximate analysis of Synodontis nigrita, Chrysichthys nigrodigitatus and Mormyrus rume in Olomore market, Abeokuta, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24632 | 19325 | 2018-05-22 06:35:03 | 24632 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was carried out to compare the microbiological and proximate analysis of fresh Synodontis nigrita, Mormyrus rume and Chrysichythys nigrodigitatus sold at Olomore market, Abeokuta, Ogun State. This fish are always available at Olomore market and other market around Abeokuta and its environment. The protein, carbonhydrate, moisture, and ash of the fishes was based on the method of analysis of the Association of Official Analysis (AOAC:1990). Data for each sp. were subjected to analysis of variance (ANOVA). The Results show no significant difference in moisture content of Chrysichthys nigrodigitatus (70.99 ~c 1.09%), Mormyrus rume (67.30 ~c 4.08%) and Synodontis nigrita (67.33 ~c I.99%). The crude protein content of Chrysichthys nigrodigitatus (12.10 ~c 0.74%) Mormyrus rume ( 15.48 ~c 1.63%) and Synodontis nigrita (I0.73 ~c 0.61%). For carbohydrate content we have Chrysichthys nigrodigitatus (1.15 ~c 0.13%9), Mormyms rume (2.09 ~c 0.20%) and Synodontis nigrita (2.04 ~c 0.10%). Fat content of Chrysichthys nigrodigitatus (7.15 ~c 1.29%) Mormyrus rume (8.97 ~c I.9%) and Synodontis nigrita (8.62 ~c 0.89%) and for ash content of Chrysichthys nigrodigititus (6.33 ~c 0.69%), Mormyrus rume (4.89 ~c 0.21%) and Synodontis nigrita (8.85 ~c 0.27%). For crude protein there was different (p 〈 0.05) same with fat content, ash content, and carbohydrate content (p〈 0.05) unlike moisture content and dry matter content which is (28.57 ~c 1.55%), (32.50 ~c 4.08%) and (32.67 ~c 1.99%) in Chrysichthys nigrodigitatus, Mormyrus rume and Synodotis nigrita. Result showed total bacteria count from (1.9 to 3.8 x 10〈sup〉6〈/sup〉 cfu/ml) from Chrysichthys nigrodigitatus while (2.8 to 4.7 x 10〈sup〉6〈/sup〉 ur cfu/ml) was obtained for Synodontis nigrita and (2.6 to 3.8 X 10〈sup〉6〈/sup〉cfu/ml) for Mormyrus rume. The micro-organism isolated were pseudomonas spp; Escherichia spp; Klebsiella spp; omomls spp, Escherichia spp., Klebsiella spp., Staphylococcus spp., Proteeus spp. and Micrococcus spp. On biochemical characterization the following bacteria was isolated Pseudomonas spp., Escherichia spp., Klebsiella, spp. staphylococcus spp., Proteus Micrococcus spp.
    Description: Includes: 44 references.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Mormyrus rume ; Synodontis nigrita ; Nigeria ; Haematology ; Sex-reversal ; Growth paramwters ; Nutrient utilizatio ; S. melanotheron ; freshwater environment ; automation
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  • 179
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    Preliminary studies on some physico-chemical parameters and fish species composition of Doma Dam, Nasarawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24638 | 19325 | 2018-05-24 09:36:38 | 24638 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study of some Physico-chemical parameters and fish species composition of Doma Darn was carried out between the month of August 2012. Fishing communities along the dam were selected at sampling stations and collection of fish species. The values of physico-parameters obtained for stations were in the range of 28.10-92 m for depth, 27.70-28.48~'for temperature, 7.03-7.64 for PH, 7.23-7.64mg/l for dissolved oxygen (DO), 30.08-31.75 ntu for turbidity, 94.64-105.17mg/l for alkalinity and 79.17-80.58mg/l for total hardness. The result indicated that there was significant difference (p〈0.5)for depth, temperature turbidity and alkalinity, while there was no significant difference (p〈0.05) for DO, pH and water hardness among the stations. The result of these parameters among the duration shows that there was significant different (p〈0.05) in all the parameters except pH. The study revealed that there were twenty-five (25) fish species belonging to 12 families in the dam. The family Cichlidae and Mochokidae and Bagridae which has three each, While the family, Polypteridae, Channidae, Centropomidae, flepsetidae and Protopteridae has the lowest number of one (1) each. The overall result revealed that the Phvsico-chemical parameters were mostly influenced by duration and not much by stations; and parametersoaram measured were within the recommended water quality requirement for growth and survival of aquatic organisms.
    Description: Includes: 10 references.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Doma Dam ; Doma Dam ; Fishing community ; Physico-chemical parameter ; Fish species ; freshwater environment ; automation
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  • 180
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    Climate change and the challenges of fisheries resources management in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24642 | 19325 | 2018-05-24 09:44:51 | 24642 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper takes a practical look at the challenges faced by fisheries resources in Nigeria due to climate change. It shows that Chad which produce 60% of smoked fish in Nigeria worth N2.6 billion is at the brink of extinction and is expected to dry to a mere 2000 sq km by year 2010 from over 25,000sq km in the 1960s. In simple clear terms, the paper gives practical adaptation and policy to face the challenges of climate change.
    Description: Includes: 11 references.
    Keywords: Environment ; Fisheries ; Nigeria ; freshwater environment ; automation
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  • 181
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    Communication strategies / matrix for stakeholders' adaptation to climate change issues in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24664 | 19325 | 2018-05-27 15:01:44 | 24664 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Over the years, man has exploited the ocean and its resources for sustainable livelihood. Man's indigenous and traditional knowledge has been the mainstay and guidance in exploiting the ocean and coastal resources. However, as industrialization and other climate conditions set in to alter or modify the productivity of the ecosystem, there has been a lot of concern by international, regional and local authorities to continuously study the prevalence of these factors and triggers off these climatic changes and their impacts on livelihood of fisherfolks at the industrial or artisanal level of fishing and other fisheries activities like fish farming and fish processing. A quantum of technical and scientific information on the ocean and interactions with other elements have been archived in various libraries, information centers and on the internet. These channels provide information for only those who can access them for policy formulation but cannot actually reach those who will benefit or implement the issues discussed in the policy documents for their livelihood. Meteorological data are reported in technical terms. Figures and other illustrations cannot be utilized by the average artisanal and industrial fishermen for the rational exploitation of the ocean resources. The woman fish processor who uses solar dryer may not be able to relate the weather condition and why her fish cannot dry at the normal time. There are times natural phenomenon like change in the direction of or its intensity can be interpreted by a fisherman as the handwork of his enemy to thwart his fishing effort for that day. Oceans sourge causes and its possible displacement of coastal dwellers might not be fully comprehended by those living in coastal communities. There is the need therefore to develope a communication and outreach strategies using a simple communication matrix for easy articulation of approaches to communicating with all potential and identified stakeholders in Climate change and its effects on stakeholders. This paper therefore discusses some of the climatic conditions and factors that affects the ocean, coastal areas and their productivity. It particularly focuses on communication strategies of information, educating and entertaining in reaching out to identified stakeholders on climate impacts for its rational exploitation and improved income for better standard of living. It finally produced a simple applicable communication matrix for reaching out to all stakeholders in Climale change and its impacts.
    Description: Includes: 10 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; freshwater environment ; automation
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  • 182
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    Preliminary study on the antioxidative and anti-fungal effects of ginger oil on the shelf life of hot smoked fish (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24670 | 19325 | 2018-05-23 07:45:45 | 24670 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The anti-oxidative and anti-fungal effects of ginger oil on smoked Chrysichthys nigrodigitatus, Clarias gariepinus and Oreochromis niloticus was examined during five week storage at room temperature (25-30)~'C. The ginger oil was extracted from fresh ginger through hydro-distillation. The fish samples were gutted washed thoroughly and each fish species was divided into three groups. Two groups were spiced with 1.0ml and 1.5ml of ginger oil/kg of fish respectively before they were smoke dried for 2 hours. The third group acts as the control which was not spiced with ginger oil. Chemical and microbiological analyses were performed to investigate quality changes, and to determine the shelf stability of the products. The lowest TBA (14.64 mg MDA/kg), and Peroxide (3.91 mEq/kg) values were recorded in 0. niloticus samples treated with 1.5ml ginger oil/kg of fish at week 1, while the highest TBA (30.48 mg MDA/kg), and PV (18.76 mEq/kg) occurred in the C. gariepinus control at week 5. The result also revealed that samples treated with ginger oil had lower mould count than the control, but there was no significant different (P~.0.05), when compared to the control after 5 weeks of storage.
    Description: Includes: 21 references.
    Keywords: Fisheries ; Nigeria ; Catfish ; Ginger ; Peroxide ; Quality ; Smoked ; Storage ; Thiobarbituric acid ; freshwater environment ; automation
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  • 183
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    Fin fish assemblage of the main channel of the lower Benue River, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23220 | 19325 | 2018-03-18 13:43:43 | 23220 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish species assemblage in the lower Benue River was assessed by collecting samples in 5 established sample stations within Benue state. Some physical and chemical parameters were also assessed. The mean values of the parameters recorded include; Temperature 24~?C, pH = 7.09, Alkalinity (Cac03) = (37 mg/l) Amonia (NH3) = (37.9 mg/I), C02= (9.5mg/I), Chloride (Nacl) = (12.8mg/I), Total hardness = (11mg/I), Dissolved oxygen (Do) = (11 mg/I), and Turbidity = (45cm). Forty eight (48) fish species belonging to 32 genera in 18 families were recorded. It was observed that the family Bagridae had the highest number of species (7, 15%) Mormyridae, Characidae and Mochokidae followed with 5 species (10.63%) each. Cyprinidae, Clariidae and Cichlidae had 8.51% with 4 species each. Citharinidae formed 6.38% with 3 species, while schilbeidae formed 4.25% (2 species). All other families had only one species recorded in it (2. 12%). Bagridae and clariidae dominated in station 1, while the family Mochokidae showed dominance in station 5. Family Ariidae, Gymnarchidae and Centropomidae were rare in the lower Benue River. There were no significant differences in the abundance of the fish species caught in the different stations. Among the stations also, the l1umber of fish caught during the seasons did not differ (p〈0. 05). These physical and chemical factors did not significantly affect occurrence and even distribution offish in the study.
    Description: Includes:-4 tables.;10 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Lower Benue R. ; freshwater environment ; Population dynamics ; Check lists ; Species diversity ; Finfish fisheries
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  • 184
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    Comparison of fried and baked fish Oreochromis niloticus cakes (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23219 | 19325 | 2018-03-18 13:41:52 | 23219 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Oreochromis niloticus fish-in-cake were made to improve its food value as well as create new menu. Fried fish-in-cake was 66.2% appealing in its colour, taste, texture and odour to assessors than the 64% rating for baked fish-in-cake.
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Fisheries ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Fishery products ; Processed fishery products ; Fish utilization
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  • 185
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    Fermentation of Synodontis membranaceus using different percentage of ginger (Zingiber officinale) (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23223 | 19325 | 2018-03-18 13:54:52 | 23223 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Synodontis membranaceus was subjected to fermentation for a period of one month with varying concentration of ginger (5%, 10%, 15%, 20%) and 20% salt as spices to produce a paste. It was buried underground at 34 +-3~?C and analyzed for proximate composition, pH, microbial load, and organoleptic properties at the beginning and end of the fermentation. Results show steady increase in nutrients such as crude fat, ash, and NFE (nitrogen free extract) but decrease in crude fiber. There were fluctuations in the crude protein of the fermented samples, an evidence of fermentation. There was an increase in the microbial load of the different treatments and a slight decrease in the moisture content. The organoleptic analysis also showed preference for taste, aroma, and overall acceptability for 20% ginger and a significant difference (p〈 0.05) was observed in the taste scores for salt only and 20% ginger.
    Description: Includes:- 5 tables.;31 refs.
    Keywords: Fisheries ; Synodontis membranaceus ; Nigeria ; freshwater environment ; Fermentation ; Fermented products
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  • 186
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    The marketing and distribution of fish in New Bussa fish market area of Niger State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23237 | 19325 | 2018-03-18 15:16:31 | 23237 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish marketing and distribution in New-Bussa market was studied weekly for three months (August -October, 2005). The result showed that the major fish species common in New-Bussa fish market are Clarias,Citharinus,Mormyrus,Bagrus,Alestes, Synondontis,Lates, Chrysicthyes, Tilapia, Hydrocynus and Clarotes. The business of catching, marketing and distribution of fish is controlled by young men and women of the age bracket of 14-40 years old. Over 15 different ethnic groups from 14 states in Nigeria and Ghana, Chad, Benin Republic, Mali are involved in fish marketing and distribution business in New-Bussa. The indigenous ethnic groups are Gungawa, Busawa, Kambari, and Nupe, they formed 65% of the ethnic groups found in New-Bussa. The remaining ethnic groups are migrants. Women dominated the trading and processing of fish.
    Description: Includes:- 4 tables.;7 figs.;5 refs
    Keywords: Fisheries ; Management ; Nigeria ; New Bussa ; freshwater environment ; Marketing ; Market research ; Fish
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  • 187
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    Assessment of fishery content in agricultural activities of the rural women in Kukawa Local Government Area (LGA) of Borno State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23235 | 19325 | 2018-03-18 15:11:53 | 23235 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Content of fishery in agricultural activities of rural women was carried out in Kukawa L.G.A of Borno State. A total of 96 respondents were randomly interviewed with the aid of structured questionnaire and data presented with descriptive statistical tools. In addition to reproductive role in marriage, women are actively involve in agriculture for economic benefit, but weak socio-economic variables need to be strengthen for improve productivity and economic benefit. Fishery (10%) has a low content in the agricultural activities of rural women which is dominated by crop farming and agricultural processing. Poor annual financial return of N19, 585.33 on average as reward for long period of 8 hours on average put in agriculture is discouraging. Diversification into fish marketing and process provides avenues for viable daily income to the women in the area. Identified constraints are extension delivery, financial poverty, farm land, technological input and infrastructure. Opportunities to empower rural agricultural women include social capital formation, co-operative group, access to fertile farm land, pro-active extension information dissemination as well as participation in government programmes like on-going fadama and agricultural credit schemes.
    Description: Includes:- 3 tables.;14 refs.
    Keywords: Agriculture ; Fisheries ; Sociology ; Nigeria ; Kukawa ; freshwater environment ; Women ; Socioeconomic aspects
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  • 188
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    The role of microfinance in wealth creation among the artisanal fisherfolks in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23245 | 19325 | 2018-03-25 12:41:19 | 23245 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: One of the greatest challenges in Nigerian rural development process particularly in the fishing communities, which are often isolated and vulnerable, is to address the constraints that exclude people from full participation in the management of their financial resources. Majority of fishers dwell along the margins of Lakes, Rivers and Creeks and mostly operate without dependable financial resources, business loans or a safe place to keep their savings. This, to a greater extent, inhibits their growth and expansion to the realization of formalized entrepreneur's status that constitutes a set-back to the sector and the National economy at large. However the recent economic transformations in the country pursue microfinance not only as a poverty alleviation tool but also as a sound and viable business. This paper reviewed the concept of microfinance, its implementation, roles, constraints etc. to serve as a guide for adoption and utilization amongst the artisanal fisher folks with the view to increasing their general well-being on a sustainable basis.
    Description: Includes:- 1 fig.;8 refs.
    Keywords: Fisheries ; Management ; Nigeria ; freshwater environment ; Artisanal fishing ; Financial institutions ; Financial resources ; Financing ; Financial management ; Fishery economics
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  • 189
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    Effects of soaking on artisanal polyvinyl-alcohol (PVA) synthetic fishing twine in freshwater, brackish and marine waters (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24183 | 19325 | 2018-05-16 14:35:10 | 24183 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Elongation (cm) and breaking-load (kgf) effects on artisanal Polyvinyl-Alcohol (PVA) synthetic twine of diameters 4mm, 6mm, 8mm and I0mm soaked in fresh (0.4ppt), brackish (25ppt) and marine (37ppt) waters for 112 days were investigated. Chemical (burning) test was carried out to identify the experimental white twine as PVA, among other six locally synthetic twines (Klust, 1973). A tensile-strength gauge machine (0-200kg) was used to test the mechanical strength properties of PVA twine diameters in dry (control) and wet states. Results indicated that elongation and breaking-load of the specimens were significantly (P〈0.05) influenced by R- Tex. Elongation and breaking-load were observed to be highest in dry twine 10mm with means of 20.75a ~c 1.05 and 140.00a ~c 5.37 respectively, higher in twine 10mm (with means of 20.40b ~c 3.50 and 131.75b ~c 5.l0 respectively) soaked in freshwater and lowest in twine 4mm (means of 1 4.83fg ~c 0.31 and 33.70h ~c 1.00 respectively) soaked in marine water. Twines of the same diameter (l0mm, 8mm, 6mm & 4mm) soaked in fresh water (0.7ppt) has highest significant (p〈0.05) elongation and breaking load than those soaked in brackish (0.25ppt) and marine water respectively. The thicker the PVA twine diameter, the higher the significant (p〈0.05) elongation and breaking load, which could lead to increased mesh sizes of fishing nets constructed from such twines. Fishermen are therefore encouraged to air-dry their fishing nets or gears when not in used to extend the shelf-life.
    Description: Includes: 4 tables.;Also includes: 18 references.
    Keywords: Fisheries ; Nigeria ; Ogun state ; Artisanal fishing ; PVA synthetic twine ; Freshwater ; Brackishwater ; Marine water ; brackishwater environment ; freshwater environment ; marine environment ; Yarns ; Synthetic fibres ; Artisanal fishing ; Fishermen ; Fishing nets ; Fishing gear ; Comparative studies ; Air exposure ; Netting materials ; Gear research ; Tensile strength ; Materials testing ; Saline water ; Fresh water ; Brackish water
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    Environmental pollution: a case study of waste water parameters from Ibrahim Adamu Lake, Jigawa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24180 | 19325 | 2018-05-13 19:07:34 | 24180 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of environmental pollution in relation to waste water parameters from Ibrahim Adamu Lake were examined for a period of 12 Months from October, 2003 - September, 2004. The physico-chemical parameters of pH, Temperature, Dissolved oxygen, Alkalinity, Nitrate, and Phosphate were examined using standard methods (APHA, 1992). It was found that all the evaluated parameters were below the Federal Environmental Planning and Protection Agency (FEPA, 1990) and World Health Organization (WHO,1999) standards.
    Description: Includes: 1 table.;Also includes: 16 references.
    Keywords: Pollution ; ASE ; Ibrahim Adamu L. ; Waste water ; Envoronment ; Pollution ; freshwater environment ; Pollution effects ; Waste water ; Physicochemical properties ; Temperature ; Dissolved oxygen ; Alkalinity ; Nitrates ; Phosphorus ; Standards ; Freshwater pollution ; Pollution surveys ; Lakes ; Water quality control
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    Prospect of retort pouch food technology in the Nigerian fishery industry: an overview (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24187 | 19325 | 2018-05-16 14:56:16 | 24187 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Retort pouch as a packaging material for varieties of food items such as fish, vegetables, fruits and food crops was highlighted. Materials required for the processing of pouches were listed and the methodology of production discussed. The paper provided insight for investors to invest in the technology of pouching as a means of engaging unemployed youths in Nigeria.
    Description: Includes: 3 figures.;Also includes: 6 references.
    Keywords: Fisheries ; Nigeria ; Niger ; Resort pouch ; Packaging ; Processing ; Raw materials ; freshwater environment ; Product development ; New products ; Fishery industry ; Packing fishery products ; Raw materials ; Food technology ; Food ; Fish ; Evaluation ; Testing ; Livelihoods ; Economic benefits ; Packing materials
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  • 192
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    Awareness on the use of solar tent dryer among the fish processors of Kukawa Local Government, Borno State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24194 | 19325 | 2018-05-16 15:09:49 | 24194 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was carried out in order to assess the use of solar tent dryer in some selected fishing settlement (Yobe, Daban Masara, Tumbun Beriberi and fish Dam) in Kukawa Local Government. Secondary and Primary data were used in this research. Secondary data were obtained from various literatues while primary data were obtained through the use of structured questionnaires. A total number of 60 respondents were randomly selected and interviewed: Fifteen from each settlement (fish processors). Simple percentages were used in analyzing the data. Findings revealed that, majority of the respondents (fish processors) 80% were not aware of the existence of solar tent dryer that can be used for drying fish, only 20% were aware of solar tent dryer.Among these respondents who are aware of solar tent dryer, only 3.33% have used it. The general perceptions of the respondents believe that they will use it if they are provided with the solar tent dryer. The level of awareness on the use of solar tent dryer for fish processing is very low, there is need for intensive awareness creation, through fishery extension workers.
    Description: Includes: 5 tables.;Also includes: 6 references.
    Keywords: Fisheries ; Nigeria ; Kukawa ; Solar Tent Dryer ; freshwater environment ; Fishery products ; Processing fishery products ; Drying ; Cured products ; Aquaculture equipment ; Artisanal fishing ; Solar power
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: application/pdf
    Format: 174-176
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  • 193
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    Status survey of artisanal fisheries in Hadejia Emirate, Jigawa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24181 | 19325 | 2018-05-16 14:32:52 | 24181 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted to investigate the status of artisanal fishery in Hadejia emirate of Jigawa state, Nigeria using a total of 192 well structured questionnaires in eight local government areas. The questionnaire captured information on biodata of respondents, water bodies and their uses, types of fish caught, level of catch and fishing gears used. The results obtained showed that fishing was mostly practices by male (79.69%), within the age of 25-35 years (33.86%) and married (61.46%) and most of them were found to be at tertiary institution of learning (55.73%). The study also revealed that majority used rivers as water source (52.08%) while only (31.25%) used the rivers for fishing and majority of their catch were Tilapia and Clarias (72.92%) with (52.60%) catching a large number above 30 per day. During catching 65 (33.85%) used Gill net, 52 (27.08%) used Cast net, 45 (23.44%) used Hook and line, while only 30 (15.63%) used Seine net.
    Description: Includes: 3 tables.;Also includes: 11 references.
    Keywords: Fisheries ; Nigeria ; Hadeja ; Surveys ; Artisanal fisheries ; Hadeja Emirate ; Jigawa state ; freshwater environment ; Artisanal fishing ; Lake fisheries ; Water bodies ; Catch composition ; Catch/effort ; Fishing gear ; Rivers ; Cast nets ; Hooks ; Lines ; Seine nets ; Fishery surveys ; Sociological aspects ; Catching methods
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: application/pdf
    Format: 121-123
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  • 194
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    Comparative study of monofilament and multifilament gillnets in Lake Kainji (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24179 | 19325 | 2018-05-13 19:05:16 | 24179 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Comparative studies of monofilament and multifilament gillnets in Lake Kainji was carried out at Monai fishing village of Lake Kainji. A total number of six nets (3 multifilament and 3 monofilament gillnets) each measuring l5 meters in length and 3 meter depth were constructed; Kuralon ropes were used as footrope and headrope, synthetic corks as float and lead as weight. The net were set in the evening (between 5:00pm and 6:00pm) and hauled in the morning (between 8am and 9am) thereby maintaining a soaked time of about l5 hours.The species captured were: Oreochromis niloticus, Oreochromis aureus, Sarotherodon galileus, Tilapia mariae, Synodontis nigaita, Alestes baromoze, Distichodus rostratus, Tilapia dageti. The result obtained from the fish caught shows that Monofilament gill net had a better performance than Multifilament gill net; this was attributed to the looseness and flexibility as well as the transparent nature of the net which makes it invisible in water. However, from the statistical analysis (variance test) carried out, there was no significant (P〉0.05) difference in numbers and weight of fish species caught by the two nets.
    Description: Includes: 3 tables.;Also includes: 5 references.
    Keywords: Fisheries ; Lates niloticus ; Oreochromis niloticus ; Oreochromis aureus ; Tilapia mariae ; Tilapia dageti ; Nigeria ; Kainji L. ; Monofilament ; Multifilament ; freshwater environment ; Gillnets ; Construction ; Catch composition ; Flexibility ; Transparency ; Mesh selectivity ; Visibility ; Netting materials ; Artisanal fishing ; Lake fisheries ; Comparative studies ; Gear research ; Gear selectivity
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 115-117
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  • 195
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    Assemblages of fish species of Ikpa River in Akwa Ibom State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24182 | 19325 | 2018-05-13 19:11:34 | 24182 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species were investigated for 12 calendar months from March 2009 - February 2010 forthnightly using traps, gillnets and cast nets from three sampling stations in Ikpa River. Ornamental fish species were sorted out from the pooled samples. The findings revealed that out of the 2307 fish specimens sampled, 1074 specimens made up of 38 species and 19 families were of indigenous ornamental fish. The highest contributing family in terms of number of species is Cichlidae (10 species) whereas Schilbeidae (593 specimens; 55.21%) is the highest contributor in terms of total number of specimens sampled. This is followed by Mochokidae and Mormyridae with 4 species each and Cichlidae with 158 specimens (14.70%). At the species level, the highest contributor is Physalia pellueida (577 specimens;53.72%)and is followed by Erpetoichthys calabarcus (60 specimens; 5.59%). The least contributors were Heterobranchus bidorsalis, periophthalmus barbarus and Pelyicachromis pulcher (1 specimen; 0.09%). Twelve families recorded only one species each. These great potentials of ornamental fish have been left unexploited and hence, undeveloped. Several species of ornamental fish have been imported into and exported from Nigeria by businessmen. This paper therefore highlights the constraints and also make recommendations for the exploitation and development of ornamental fishery in Akwa Ibom State and its environs.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Fisheries ; Nigeria ; Ikpa R. ; Exotic ; Ornamental ; Indigenous ; Fish species ; Ikpa River ; freshwater environment ; Lake fisheries ; Ecological associations ; Artisanal fishing ; Taxonomy ; Ornamental fish ; Exploitation ; Fish ; Stock assessment ; Potential resources ; Fishery development ; Fishery surveys ; Freshwater fish ; Check lists
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 124-128
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  • 196
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    Effects of chicken manure to fingerlings of Nile tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24210 | 19325 | 2018-05-19 06:43:04 | 24210 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of acute toxicity of chicken droppings to fingerlings of Oreochromis niloticus was determined under laboratory conditions using static bioassay for a period of 96 hours. The 96-hrs LC50 was estimated to be 2.19 with upper and lower confident limits of 3.24 and 1.48g/l. Water quality examination revealed a reduction in the level of dissolved oxygen, increase in alkalinity and free carbon dioxide with increase in concentrations of the fertilizer while there were no significant different (P〉0.05) in the ievels of pH and temperature when compared with the control. Fish exposed to higher concentrations of the organic fertilizer became darker in colour with mucous secretion, exhibited erratic swimming and showed signs of respiratory distress before death. Methods and standard doses for subsequent organic fertilizer application in fish ponds for survival and growth are discussed.
    Description: Includes: 2 tables.;Also includes: 24 references.
    Keywords: Pollution ; Aquaculture ; Oreochromis niloticus ; Nigeria ; Abuja ; Organic fertilizer ; Acute toxicity ; Oreochromis niloticus ; Water quality ; freshwater environment ; Manure ; Organic fertilizers ; Fingerlings ; Freshwater fish ; Toxicity ; Water quality ; Inspection ; Dissolved oxygen ; Alkalinity ; Carbon dioxide ; Fish ponds ; Survival ; Growth ; Pollution effects ; Bioassays ; Controlled conditions ; Lethal limits ; Fish culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 231-234
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  • 197
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    Influence of physico-chemical parameters on the distribution of freshwater snails in River Uke, Nassarawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24213 | 19325 | 2018-05-19 06:48:43 | 24213 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Physio-Chemical parameters of River Uke, Keffi, Nasarawa State, were studied between the months of February to August 2011. Nine water parameters were analyzed and Melanoides tuberculata was also identified using identification keys by Brown and Kristensen (1993). These include temperature, pH, alkalinity, turbidity, conductivity, nitrates, phosphates, total dissolved substances and dissolved oxygen using the methods described by Boyd (1979). The temperature ranged between 25~'C - 27.5~'C (mean = ~c 26.31~'C), while pH ranges between 6.3 and 7.5(mean = ~c 6.89). The highest value obtained for alkalinity was I5.4mg L-1, while the lowest was 4mgL-1(mean = ~c 10.2mg L-1). Dissolved oxygen concentration value was between 4.lmgL-1, and 8.6mgL-1(mean = ~c 6.35mgL-1), the turbidity in dry season range between 50 to 60 cm and in rainy season, it ranged between 4 to 7 cm. The total dissolved substances range between 40ppm and 200ppm. The conductivity value ranged between 80~ks/cm and 400~ks/cm. An extreme high concentration of phosphate was recorded and ranged between 0.9mL-1 and 4.2mg L-1, which was due to water and land use practice. The nitrate concentration was negligibly low with concentration between 0.00% and 0.15%. This concentration was however adequate and support fish population and freshwater snails such as Melanoides tuberculata.
    Description: Includes: 12 references.
    Keywords: Biology ; Limnology ; Pollution ; Nigeria ; Nassarawa State ; Uke River ; Freshwater snails ; freshwater environment ; Physicochemical properties ; Rivers ; Water quality ; Water properties ; Aquatic environment ; Temperature ; Dissolved oxygen ; Alkalinity ; Turbidity ; Nitrates ; Phosphates ; Geographical distribution
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 246-249
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  • 198
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    Bacteriological assessment of smoked fish (Clarias Sp.) around Shiroro Lake area of Niger State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24185 | 19325 | 2018-05-16 14:41:02 | 24185 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Bacteria has been implicated in food poisoning, and smoked fish is not an exception.Generally, fish is highly susceptible to spoilage; therefore this study evaluated the bacteria load in smoked fish from three major locations in Shiroro area of Niger State namely; Gwada, Kuta and Zumba.The smoked fish samples collected from these locations were smeared at both the gills and head regions of the fishes. The bacteria samples identified were Escherichia coli, Bacillus subtilis, Staphylococcus aureus, Staphylococcus epidermis, Pseudomonas aeruginosa, and Samonella typhi, which were common to all the three locations sampled, while only Streptococcus feacaliswas only was found to be present in both Kuta and Zumba location.The frequency of occurrence of these 68 bacteria samples isolated ranges from 8 - 20%, with Bacillius subtilis having the highest occurrence and Pseudomonas aeruginosa have the least occurrence. Out of the total 68 samples, 14 skin samples (20.6%) and 5 gills samples (7.4%) exceeded the acceptable limits of total mesophilic aerobic counts which were 10〈sup〉6〈/sup〉 - 10〈sup〉7〈/sup〉 cfu/g. In the case of total coliform counts, 12 skin samples (17.6%) and 7 gills samples (10.3%) exceeded the acceptable limit which is 4.0 x 102, while in the case of Staphylococcus aureus, 4 skin samples (5.9%) and 2 gills samples (2.9%) exceeded the acceptable limit which is 103 cfu/g. Similarly 3 skin samples (4.4%) and 1 gill sample (1.5%) exceeded the acceptable limit of Salmonella typhi which is 104 cfu/g.
    Description: Includes: 4 tables.;Also includes: 21 references.
    Keywords: Fisheries ; Health ; Escherichia coli ; Bacillus subtilis ; Staphylococcus aureus ; Staphylococcus epidermis ; Pseeudomonas aeruginosa ; Nigeria ; Shiroro L. ; Bacteria ; Smoked (Clarias spp) fish ; Location and recommended values ; brackishwater environment ; freshwater environment ; marine environment ; Bacteria ; Food poisoning ; Cured products ; Fish ; Fish spoilage ; Acceptability ; Lake fisheries ; Gills ; Brain ; Evaluation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 140-144
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  • 199
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    A survey of the fisheries of River Niger at Yauri, Kebbi State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24188 | 19325 | 2018-05-16 14:57:51 | 24188 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A survey of the fisheries of river Niger at Yauri was conducted with the aid of questionnaires administered randomly at four (4) landing sites of Tashan Kasuwa (main market), Gidan-ruwa, Yabon-ruwa and Hutawa. A total of fifty (50) questionnaires were administered in all the villages. From the research work it was found that 76 % of the fishermen operate on full time basis while 24 % operate on part time basis. Out of the 50 fishermen interviewed only 46% were licensed to operate there. The type of fishing gears and equipments used in Yauri are hook and line, cast net, gill net and seine net. About 46 % of the fishermen were found using mesh size less than 2.0 cm. The dominant fish species caught during flood and dry seasons include Clarias spp., Lates niloticus respectively. Higher catches are made in the months of March and April. All the fishermen interviewed (100%) do not process their fish but disposed them off fresh. Sixty percent of the fishermen belong to different cooperative societies, while 40% do not belong to any cooperative society. The problem associated with fishing operation at Yauri includes that of lack of credit facilities, lack of extension agents, and high cost of fishing items, poor road network and remote location of the fishing village.
    Description: Includes: 5 tables.;Also includes: 8 references
    Keywords: Fisheries ; Nigeria ; Yauri ; Niger River ; Fisheries ; Fishing operations ; River Niger ; yauri ; freshwater environment ; Fishery surveys ; Fishermen ; Artisanal fishing ; Seine nets ; Fishing gear ; Fishing ; Equipment ; Fish ; Catch statistics ; Cooperatives ; Financial management ; Extension activities ; Fishing villages ; Locations (working) ; Seasonal variations ; River fisheries
    Repository Name: AquaDocs
    Type: conference_item , TRUE
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    Format: application/pdf
    Format: 152-154
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  • 200
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    Heavy metal content of sole, Solea solea and croaker, Pseudotolithus typus from Lagos and Delta State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24227 | 19325 | 2018-05-19 07:16:39 | 24227 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigated the levels of lead (Pb), cadmium (Cd), Copper (Cu), Chromium (Cr) and Zinc (Zn) in two common edible fish species, Sole, Solea solea and Croaker, Pseudotolithus typus from Makoko and Koko in Lagos and Delta states respectively. Heavy metal contents were determined by air-acetylene flame Atomic Absorption Spectrophotometer after wet digestion of dried and milled samples with 1:1 HN0〈sub〉3〈/sub〉: H〈sub〉2〈/sub〉O〈sub〉2〈/sub〉. Results obtained (~kg/g, dry weight) for Sole in Lagos and Delta states were: Pb (0.330 and 0.149), Cd (0.097 and 0.063), Cu (0.869 and 0.434), Cr (1.184 and 0.826), Zn (7.612 and 7.890); and Croaker: Pb (0.163 and 0.045), Cd (0.115 and 0.029), Cu (0.990 and 0.694), Cr (1.008 and 1.038) and Zn (6.756 and 6.168) for the wet season (April-October); and Pb (0.534 and 0.527), Cd (0.373 and 0.410), Cu (0.437 and 0.556), Cr (0.834 and 0.983), Zn (6.764 and 9.343) for sole and Pb (0.210 and 0.213), Cd (0.264 and 0.307), Cu (0.442 and 0.483), Cr (0.577 and 0.597) and Zn (4.783 and 5.924) for croaker in the wet season (July-October). Significant (P~B 0.05) variations were observed in metal content between fish in terms of species, location and season. Generally, sole had higher metal concentrations than croaker; and metal contents were higher in samples from Lagos compared to Delta, probably due to the contribution of more effluents from industrial, commercial and municipal wastes in Lagos state. Cd and Cr levels in the test species were found to exceed international standards. It is recommended that a programme of continuous monitoring and control of the physical and chemical characteristics of components and food products of Nigeria's coastal zone be incorporated as a management tool for this important ecological zone.
    Description: Includes: 20 references.
    Keywords: Fisheries ; Pollution ; Solea solea ; Pseudotolithus typus ; ASE ; Nigeria ; Lagos Lagoon ; ASE ; Nigeria ; Delta ; freshwater environment ; Heavy metals ; Comparative studies ; Seasonal variations ; Flatfish fisheries ; Effluents ; Pollutants ; Environmental monitoring ; Pollution control ; Pollution effects ; Pollution monitoring ; Freshwater fish ; Industrial wastes ; Freshwater pollution ; Lead ; Cadmium ; Copper ; Chromium ; Zinc ; Bioaccumulation ; Food fish
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 295-299
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