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  • 1
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    Capacity building and training requirement for effective fisheries and aquaculture extension in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23216 | 19325 | 2018-03-17 12:51:36 | 23216 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper examines the importance of capacity building and training requirement for the benefit of fisheries and aquaculture extension in Nigeria. It involves the analysis of secondary data bothering on the management of agricultural extension in Nigeria over time vis-avis various agricultural development programmes in the past in which fisheries and aquaculture extension was apparently de-emphasized in favour of crop and livestock agriculture. It is therefore recommended as a way forward that a favorable reform in the Nigerian agricultural extension system will be a necessary avenue to put fisheries and aquaculture extension in proper perspective for effective service delivery which will be a good entry point to achieving the millennium development goals of combating hunger, extreme poverty and attainment of food security in Nigeria.
    Description: Includes:-7 refs.
    Keywords: Aquaculture ; Fisheries ; Information Management ; Nigeria ; Extension services ; freshwater environment ; Technology transfer ; Training ; Education ; Sociological aspects
    Repository Name: AquaDocs
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  • 2
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    Women in fisheries: a case study of the Kainji Lake Basin, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23222 | 19325 | 2018-03-18 13:52:04 | 23222 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The study examined the contribution of women to fisheries in Kainji Lake Basin, Nigeria. The sample size of 80 respondents was selected through a purposive sampling in ten (10) fishing villages around Kainji Lake Basin. Instrument for data collection was semi- structured questionnaire. Data was analyzed using descriptive statistic. The result showed that the women are mostly engaged in processing, marketing and financing. About 60 percent of the women interviewed are engaged in marketing and financing. Ten (10) percent of the respondents are engaged in financing. The low participation in financing is attributed to high amount of capital involved. It is recommended that women should be made to benefit more from rural development policies and programmes.
    Description: Includes:- 2 tables.;1 fig.;7 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Kainji L. ; freshwater environment ; Women ; Fisheries
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    Format: 66 - 71
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  • 3
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    Proximate composition and amino acids profile of smoked catfish Clarias gariepinus and tilapia Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23226 | 19325 | 2018-03-18 14:51:17 | 23226 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The proximate composition and amino acids assay of smoked Clarias gariepinus and Oreochromis niloticus were determined using standard procedures. The mean proximate composition of Oreochromis niloticus are 8.9% moisture, 16.00% lipids, 5.6% ash, 44.5% crude protein, 0.42% crude fiber and 24.9% NFE while Clarias gariepinus has 8.19% moisture, 15.55% lipids, 4.725 ash, 40.46% crude protein, 0.50% crude fiber and 30.58% NFE. There is therefore a nutrient variation between the 2 species of fish Oreochromis niloticus has higher crude protein, lipids, moisture and ash content than Clarias gariepinus.The amino acids profile shows that both fishes have 17 amino acids. Apart from Tryptophan, the following essential amino acids Histidine, Methionine, Threonine, Isoleucine, Leucine, Lysine, Valine and Phenylalanine are present in both fish. Oreochromis niloticus however has higher quantities of the essential amino acids except for Histidine than Clarias gariepinus
    Description: Includes:- 2 tables.;2 figs.;7 refs.
    Keywords: Chemistry ; Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Amino acids ; Ash content ; Lipids ; Organic compounds ; Moisture ; Proteins
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    Format: 91 - 95
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  • 4
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    A comparative analysis of the food and feeding habits of African lungfish (Protopterus annectens, Owen) in River Rima and Goronyo Dam North Western Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23232 | 19325 | 2018-03-18 13:49:50 | 23232 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The food and feeding habits of Protopterus annectens of the River Rima and Goronyo Dam in North Western Nigeria was studied. A total of one hundred and eighteen (118) fish samples were collected from October, 2001 to September, 2002 and the stomach contents were analyzed using frequency of occurrence method. The feeding adaptation with respect to mouth and related structures, gill rakers and dentition were examined. The gut length and fish length indicated rectilinear positive relationship. The regression coefficient (b) and correlation coefficient (r) of GL TL relationships were highly significant (p〈0. 01). The main taxa of food substances found in the stomachs included substances of plant and animal origins, with overall frequency of 49. 1and 38.3% for the samples from River Rima and 27.2 and 60.3% for those from Goronyo Dam in the same order. The results of percentage occurrence of the food items in the dry season showed that animal substances in the juveniles (51.7%) and the adults (41.4%) were higher than the plant materials in the samples from the two water bodies. In the rainy season, the percentage occurrences of animal substances were higher in the adults (= 30cm) samples from Goronyo Dam than those samples from River Rima, while the same food items were absent in the juveniles (= 30cm) from the two water bodies. These feeding adaptive features indicate the roles of the species in their ecological niche and provide base line information that could be useful in satisfying their food requirement under culture condition. The diversity of food substances found in the stomach and their occurrence in the juveniles and adults varied with the water bodies and season.
    Description: Includes:- 5 tables.;19 refs.
    Keywords: Ecology ; Fisheries ; Protopterus annectens ; Nigeria ; Rima R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Feeding behaviour ; Feeding ; Food chains ; Food preferences
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    Format: 128-135
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  • 5
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    An appraisal of the traditional fish handling and processing methods in Lake Chad (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23218 | 19325 | 2018-03-18 13:40:29 | 23218 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The paper reviews the various techniques of fish handling and processing in Lake Chad. Poor handling of fish catches on board coupled with the distant location of the fishing grounds and thick aquatic vegetation on the lake which hamper fast movement of catches to the processing centers are the bane of good quality fresh fish getting to the processors. The techniques adopted in processing and preservation are mainly smoking, char-burning and sun drying. Defects suffered by the processed products of the methods include high moisture content, heavy insect infestation, bacterial decomposition and fungal attack. Protection of catches from direct sunlight by spreading wet jutes over them will lower the rate of deterioration. Removal of the aquatic vegetation by appropriate authorities and canalization will ease movement of fish catches to the processing centers. More serious enlightenment of the processors on the adoption of the 'Chorkor' oven will reduce the problems presently facing cured fish. The use of rambo insecticide and other dangerous chemicals by the fish processors and marketers for the preservation of fish products before repackaging should be discouraged.
    Description: Includes:- 1 table.;43 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Fish handling ; Handling ; Processing fishery products ; Curing
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    Format: 46 - 51
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  • 6
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    Design of double chine flat bottom fishing canoe for lake fishery (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23217 | 19325 | 2018-03-18 13:38:58 | 23217 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: A 7.0 meters Length Overall (LOA) flat bottom canoe similar to the one commonly used for fishing in Kainji lake, but with some modifications, was designed. The improvements/modifications over the local canoe include, an additional chine to reduce the flatness of the bottom which was absent in the local canoes commonly used. The canoe's light displacement (weight empty) was 0.48 Tonne, which was similar to local canoe of same size. The draft obtained was 0.13 M( 13cm), which is 36.9% of its depth (0.48 M). The capacity of the canoe was 1.304 tones. The water plane area (WPA) was 3.89 M2; WPA coefficient, and block coefficient were 0.83, and 0.82 respectively. The modification on the canoe resulted in provision of a canoe with the bottom shaped close to V-bottom to aid better performance on rough turbulent water such as the Kainji Lake, and increased life span of canoe and safety of fisher folk while aboard fishing.
    Description: Includes:- 1 table.;7 figs.;7 appendix
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Boats ; Design ; Fishing vessels
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    Format: 34 - 45
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  • 7
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    Strengthening fisheries extension under the Unified Agricultural Extension System (UAES) policy towards sustainable fisheries development in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23221 | 19325 | 2018-03-18 13:47:06 | 23221 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The paper examines the prospect and constraints of fisheries extension under the unification policy. It revealed certain barriers influencing its fullest utilization as well as fisher folks participation in extension programmes. Some of the barriers identified are related to inaccessibility, logistic support, improper aquaculture methodology, insufficient applied research in small scale fisheries, inability to convert research findings into positive results by small scale fisheries, inadequate number of fisheries research personnel within the existing research centers and institutes catering for the fishers sector, complexity of issues, lack of coordination and continuity in research and data deficiencies in small scale fisheries. Based on the findings, the paper recommends that, the effectiveness of the methods of identifying research needs by practitioners be assessed, the impact of the generated research results in reducing or solving field problems be ascertained, the constraints to diffusion of proven technologies from research being integrated into small scale fisheries be evaluated, the degree of effectiveness of extension delivery tools on .fishers technology adoption be ascertained, and lastly, adequate applied research in small scale fishery be emphasized.
    Description: Includes:-8 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; Extension services ; freshwater environment ; Technology transfer ; Education
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    Format: 62 - 65
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  • 8
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    Comparison of microbial load and proximate analysis of fresh lean fish Labeo coubie and fresh fatty fish Synodontis membranaceus with their smoked products (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23224 | 19325 | 2018-03-18 13:56:36 | 23224 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Comparative study on the microbial load and proximate composition of fresh lean fish Labeo cubie and fresh fatty fish Synodontis membranaceus with their smoked products were carried out. The colony count of different parts was carried out on all the samples and the results show the highest microbial load on the gut of both the fresh lean fish and the fresh fatty fish. The smoked dried lean fish and the smoked dry fatty fish had lower microbial counts compared to their fresh samples because smoking reduces the microbial load on fish. Biochemical characterization carried out on all isolates confirmed Gram-negative bacterial isolates. The proximate composition show that water is the most affected nutrient during the hot smoking of both the fresh fish sample and the fresh fatty sample with a corresponding increase in protein content. There was a significant difference (p〈 0.05) in proximate composition of smoked product of fresh fatty fish and the fresh lean fish. The colony counts of different parts of the fish reveals that majority of the microorganisms is found in the guts followed by gills and the lowest in the skin this is the pattern in the two fresh fish but for smoked fish the gut is usually removed before smoking.
    Description: Includes:- 4tables;9 refs.
    Keywords: Fisheries ; Labeo coubie ; Synodontis membranaceus ; Nigeria ; freshwater environment ; Microbial contamination ; Microbiological analysis ; Fishery products
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    Format: 80 - 85
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  • 9
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    Analysis of containers used by fishermen at Lake Alau community in Konduga Local Government Area of Borno State, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23238 | 19325 | 2018-03-18 15:18:15 | 23238 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Good handling of fish from the point of harvest to consumption is very essential and the quality of fish can only be maintained if only suitable containers are used in its processing, transportation, distribution and marketing. This study analyzed the different containers used by fishermen at lake Alau community in Konduga Local Government Area of Bomo State. The study was carried out in two prominent leading sites of lake Alau community which are kachalari and Abbari with the aid of questionnaires interview conducted with 50 randomly selected respondents fishermen. Both primary and secondary data were collected. The collected data were analyzed using the market cost of the various fish containers. The result shows that fish containers such as Metal basin, sacks, flat sacks and Metal trays have strong strength while Baskets, jerry cans and calabash have moderate strength the polythene bags, stationery and news print are very weak. Also baskets have the highest percentage of usage 20% while flat sacks, polythene bags and stationery have the highest percentage of 4%, which are the lowest. It can be concluded that, the different containers are afforded to fishermen but most of the containers are often kept dirty, which lead to poor hygiene, rough handling and invariably post-harvest losses and shortage in food supply. It can be recommended that, sheds should be provided at the landing sites to protect fresh fish the direct heat of the sun and enlightment of fishermen and traders on the minimum standard o fthe quality and hygiene for fish and fishery products.
    Description: Includes:- 4 tables;6 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Alau L. ; freshwater environment ; Containers ; Fishery products
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    Format: 179 - 183
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  • 10
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    The genetic characteristics of cephalic abnormality and its aquaculture implication in Clarias gariepinus (Burchell 1822) (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23241 | 19325 | 2018-03-18 15:26:11 | 23241 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Cephalic abnormality in nine mating groups involving Clarias gariepinus with cephalic abnormality, non Cephalic and Maiduguri origin were investigated to determine the level and the genetic basis of the occurrences and its aquaculture implication. The highest mean percentage survival in a Cephalic crossed with non cephalic group was 68.6% whereas the last mean percentage survival was 25.7% in the group of Maiduguri cross with Maiduguri parent. Cephalic abnormality was observed in the crosses with both female and male cephalic with a total frequency ranging from 0 % to 70.8. %. The least number of cephalic abnormality was 18.5% which involved a cross of non cephalic with cephalic, and the highest was 70.8%. This level of cephalic abnormality shows that the defect was hereditary. This result implies that, the genetic factor is a major contributor in the feature of cephalic abnormality in Clarias gariepinus.
    Description: Includes:-1 table.;3 appendixes.;11 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Diseases ; Deformation ; Fish culture ; Genetics ; Abnormalities ; Genetic abnormalities
    Repository Name: AquaDocs
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    Format: 199 - 208
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  • 11
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    Bacteriological quality of water and fish samples from Kainji Lake and the effect of animal and human activities (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23242 | 19325 | 2018-03-25 12:34:41 | 23242 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Kainji Lake is a man-made Lake and is impounded in 1968 to generate hydroelectric power. The Lake also offers opportunities for developmental projects like Fisheries and Irrigation. Lake Kainji receives organic waste through husbandry operations in which the cattle defecate into and around the bank of the Lake. Other sources of pollution include runoff from farms, bathing and washings in the Lake. Surrounding villages e.g. Tarda and Musawa used the Lake as source of raw drinking water and also for other domestic purposes. Bacteriological quality of fish and water from the Lake is carried out as well as that of cow dung by using primary isolation media and biochemical analysis. Physico-chemical parameters of water from the Lake is also determined. Total viable bacteria count and total coliform count of the water range from 3.4 x 104 to 03.8x 106 Cfu/ml and 1.4 x 103to 2.1 x 105Cfu/ml respectively. Cow dung has total coliform count of 6.9 x 105 while fish gills has total coliform count of 1.6x103cfu/g. Bacteria species such as Escherichia coli, Salmonella typhi, Aeromanas hydrophila, and shigella species were found in the water body. Escherichia coli, Aeromonas hydrophila, and Salmonella species were found in the fish samples. Escherichia coli, Aeromonas hydrophila, Shigella species and Salmonella species were isolated from cow dung. Physicochemical Parameters such as DO, BOD and N03-N range from 4. 7 to 5.2mg/l, 0.2 to 0.9mg/1 and 7.0 to 9.3 mg/l respectively. This result shows that Kainji Lake is an intermediately polluted water. It is therefore necessary that cow dung used for fertilization of fish ponds should be screened for pathogens before use. It is also recommended that pollution of surface water bodies through human activities should be discourage by legislation on water pollution.
    Description: Includes:- 6 tables.;14 refs.
    Keywords: Biology ; Fisheries ; Pollution ; Nigeria ; Kainji L. ; freshwater environment ; Bacteriology ; Water quality ; Environmental effects ; Pollution
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    Format: 209 - 218
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  • 12
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    Elemental concentration and size relationship in African cuttlefish Sepia bertheloti, from the coastal waters of Qua Iboe River, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23249 | 19325 | 2018-03-25 14:29:19 | 23249 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Ten specimens of African cuttlefish, Sepia bertheloti, from the coastal waters off Qua Iboe River, Southeast Nigeria, were analyzed for the relationship between the concentration of the elements and the size of the species. Energy Dispersive X-ray fluorescence technique was employed to determine the elemental composition of the species. Eleven elements were identified in the body of cuttlefish. These were Chlorine, Strontium, Potassium, Calcium, Bromine, Iron, Copper, Zinc, Manganese, Nickel and Selenium of these elements, the concentration of calcium, potassium. Copper and strontium had a positive correlation with the weight, while the concentrations of manganese, nickel, chlorine, iron were negatively correlated with their weights. However, only manganese had a significantly negative correlation (p〈0. 05). Bromine and zinc had no correlation with the weights of the species. There also existed a significant positive correlation between Ca and K, Se and Ni, Cu, Br and Zn and St and K. We conclude that African cuttlefish, irrespective of size is a rich source of nutritional elements and is especially recommended for pregnant women and for all age groups.
    Description: Includes:- 2 figs.;9 refs.
    Keywords: Fisheries ; Sepia bertheloti ; ASE ; Nigeria ; Gulf of Guinea ; Nigeria ; Qua Iboe R. ; freshwater environment ; marine environment ; Nutritional requirements ; Potassium ; Nutrition
    Repository Name: AquaDocs
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    Format: 245 - 249
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  • 13
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    Women participation in fisheries in some fishing communities in Sokoto, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23246 | 19325 | 2018-03-25 12:43:59 | 23246 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This study set out to investigate the participation of women in fisheries in some fishing communities in Wamakko Local Government Area of Sokoto state. It succeeded in establishing the fact that women are active though to some extent in fisheries in this area. This is as a result of the prevailing socio-cultural, as well as religious set up which revolves round task sharing. It however highlighted the fact that women's contribution in the fisheries sub-sector is necessary to improve their livelihood and by so doing, to directly help households.
    Description: Includes:- 8 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Sokoto ; freshwater environment ; Women ; Fisheries ; Fishery resources
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    Format: 233 - 235
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  • 14
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    Acute toxicity and behavioural effects of chlorpyrifosethyl pesticide to juveniles of Clarias gariepinus Teugels (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23253 | 19325 | 2018-03-25 14:37:19 | 23253 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Chlorpyrifos-ethyl with its mode of action was evaluated in laboratory studies to determine its 96-h acute toxicity, using juveniles of Clarias gariepinus. The fish was exposed in glass aquaria to 0.64~cmg/l, 0.80mg/l, 0.96mg/l, 1.12mg/1 and 1. 28mg/1. The test substance was found to have lethal effects on fish as they changed fish behaviour and caused death. The 96-hLC50 value for C. gariepinus was estimated as 0.92mgl-1. Observations of be bavioural and mophlogical responses were used as indicators of sublethal toxicity. The behavioural toxicology bioassay may be valuable in comparing and predicting the mode of action of new or unknown toxicants in this and other fish species.
    Description: Includes:- 1 table.;1 fig.;2 plates.;38 refs
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; freshwater environment ; Toxicity ; Toxicants ; Pollution ; Lethal effects
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  • 15
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    Indigenous knowledge system in fisheries: a review (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23260 | 19325 | 2018-03-25 14:50:35 | 23260 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-13
    Description: Scientists and researchers agree that developmental projects should have impact on the targeted groups. In this context a review was made on the indigenous knowledge system in fishery with a view to elucidating the indispensability of the system due to the increasing acceptance globally. The importance of the system and the factors militating against it where shown. The relationship between fisheries science and the fisher's knowledge was also discussed. Some indigenous practices as well as equipment used by different people were cited. It was concluded that local knowledge of the environment and resources used, as well as the society within which the resultant goods and benefits are distributed is fundamental to the continuity of sound community based management practices. Recommendation was made for research to be conducted in every facet of fishery traditional system with a view to fusing the two; the indigenous and scientific to complement each another.
    Description: Includes:- 23 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; Information Sources ; Indigenous knowledge ; freshwater environment ; Fishery management ; Stock assessment
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    Format: 330 - 335
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  • 16
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    Study on the effect of two construction materials on the efficiency of fisheries aggregating devices (FADs) in Lake Kainji Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23259 | 19325 | 2018-03-25 14:49:05 | 23259 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish Aggregating Devices (FADs) were experimented in Lake Kainji using worn out automobile lyres and cement blocks for a period of 12 weeks. Six tyres and blocks were tied together separately in 3 replicates and randomly suspended in the lake at a depth of 2 metre and 50 meter interval. After 8 weeks of suspension, a fleet of gillnets with 76mm mesh size and hung at E-value 0.5 were zigzag set across the suspended FADs for 12 fishing periods with 13 hrs soak time (~c1.0268.D.) per period The trial showed that the cement block FADs attracted more fish (70% of the total fish caught) belonging to 6 different species. The lyres FADs attracted only 3 species of fish constituting some 30% of the total fish caught Citharinus citharus dominated the catch of the block FADs constituting 52.3% of the total catch, while Oreochromis niloticus was 46.4% of the tyre FADs. The Horizontal Enhanced Fishing Zone (EFZ) was found to be between 5 to 12 metres from the location of the FADs. There was significant different (P〈0.05) in the catches of the two FADs.
    Description: Includes:-14 refs,;1 table,;3 figs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fishing gear ; Gear construction ; Gear materials ; Gear research
    Repository Name: AquaDocs
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    Format: 324 - 329
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  • 17
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    Effect of baits on the efficiency of Malian traps in Lake Kainji (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23278 | 19325 | 2018-03-28 15:52:01 | 23278 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-13
    Description: Studies on the effects of two fishing baits on the catch composition of Malian Traps in Lake Kainji were monitored. The Traps were set at Monia fishing village in the southern basin of the Lake Baited with boiled yam (Dioscorea rotundata) and fresh palm fruit (Elaeis guineensis) and were inspected twice daily for seven weeks. The fishes caught comprised of nine (9) species belonging to four (4) families. The result of analysis of variance of the biomass as well as number and percentages of fishes caught in the traps by the baits showed there was no significant difference (P〉0.05). However, both baits showed better efficiency for Tilapia zilli, Oreochromis niloticus and Hemichromis fasciatus than other species caught but trap baited with fresh palm fruit had better efficiency for Distichodus restratus and Alestes nurse. There was wide range between the minimum and the maximum size of species caught, which showed the efficiency of the traps capturing small size, juveniles and the adult of large fish species due to small mesh size (1'') net cover of the trap. Recommendations were made for better performance and profitable fishing of Malian traps.
    Description: Includes:- 4 tables.;11 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; Malian trap ; freshwater environment ; Fishing ; Bait ; Trap fishing
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    Study of ichthyofauna of Daberam Reservoir, Katsina State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23327 | 19325 | 2018-04-06 16:05:03 | 23327 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Research was carried out to explore the fish species diversity and study some aspects of the biology of fish of Daberam reservoir, Katsina state, Nigeria, for a period of three month from March to May 2009. Samples were collected from commercial fishermen and experimental fishing gears, preserved in formalin and taken to laboratory for identification; confirmation was done by fisheries experts. Eight genus comprising ten species were identified. The regression coefficient (b) was 3.07, 2.91 and 3.21 for the three most commercially importance species in the reservoir i.e. Oreochromis niloticus, and Clarias gariepinus respectively which indicated Positive allometric growth for O. niloticus and C. gariepinus and negative allometric growth for T. nilotica. The mean condition factor (k) was 1.140, with values of 1.027and 0.732 for O. niloticus and C. gariepinus, respectively. This indicates that the fish are not leaving well compared to other freshwater fishes.
    Description: 18 refs.
    Keywords: Ecology ; Fisheries ; Oreochromis niloticus ; Clarias gariepinus ; Nigeria ; Daberam Reservoir ; freshwater environment ; Fishery biology ; Biodiversity ; Species diversity ; Length-weight relationships ; Condition factor
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    Improved fish processing and preservation techniques in Lake Chad (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23336 | 19325 | 2018-04-07 17:13:31 | 23336 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Improved fish processing and preservation techniques in Lake Chad were carried out at Federal College of Freshwater Fisheries Technology, Baga, Borno State, Nigeria. Experiments were carried out using either Kainji Gas Smoking Kiln, Watanabe Kiln, Salting and Solar Drying. The improved (Modern) methods of preservation are faster, more durable, ensure a greater varieties of fish products, render bacteria actions ineffective and above all, products are more appetizing than the traditional preservative techniques but the latter are cheaper and easier to design with local materials.
    Description: Includes:- 3 table.;4 refs.
    Keywords: Fisheries ; Nigeria ; Chad L. ; freshwater environment ; Processing fishery products ; Curing ; Drying ; Processed fishery products
    Repository Name: AquaDocs
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    Evaluations off heavy metals in fish from Lake Geriyo Yola, Nigeria using x-ray fluorescence technique (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Description: Includes:- 1table.;11 refs.
    Keywords: Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
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  • 21
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    The role of middlemen in the marketing of smoked fish in Doron Baga Fish Market, Borno State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23332 | 19325 | 2018-04-07 17:07:41 | 23332 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This paper examines the role of middlemen in the marketing of smoked fish in Doron Baga fish market of Kukawa Local Government Area of Borno State. Data were obtained from 200 respondents using stratified random sampling technique, with the aid of structured questionnaire. Data were analyzed using descriptive statistical tools. Secondary sources of information were also gathered from research papers, reports and journals. The study revealed that, there are two types of middlemen in the Doron Baga fish market: selling brokers (Dillali) accounting for 75% and buying brokers (Yan acha) 25%. The role played by the selling brokers includes selling for the fishermen with commission, lending money to fishermen and providing security for the unsold fish. Buying brokers assist those that want to buy fish while the buyer gives them little amount of money as commission. Brokers get more clients when the fish during periods of maximum catch. The problems the middlemen face are failure of the fishermen to pay back the money borrowed from the selling brokers while buyers hardly trust the buying brokers.
    Description: Includes:- 3 tables.;5 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Baga ; Middlemen ; Fish marketing ; freshwater environment ; Marketing ; Market research
    Repository Name: AquaDocs
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    Format: 49-52
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  • 22
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    Capture fisheries of Kontagora Reservoir, Niger State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23333 | 19325 | 2018-04-07 17:09:15 | 23333 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A study of the capture fisheries of Kontagora Reservoir was carried out between January - December, 2007, using statistical frame and catch assessment survey methods. Five fish families comprising seven fish species were recorded. Hemichromis fasdatus, a cichlid was the most dominant species with mean value of 414.3 and 7715Kg in terms of number and weight respectively. Nineteen commercial fishermen were recorded, with the following fishing gears: gill net, cast nets, long lines, and Malian traps. The fishing craft included wooden canoe. The total mean catch of the fishermen were 4.40(1.36) kg/canoe or 167(52.64) fishes/canoe. The reservoir was productive in comparison with other smaller but productive African lakes. The monitoring, control and surveillance (MCS) system was suggested for management consideration, with emphasis on registration of fishermen and their fishing equipment, enforcement of minimum mesh size of 3” and establishment of community based cooperative scheme.
    Description: Includes:- 4 tables.;1 fig.;10 refs.
    Keywords: Fisheries ; Nigeria ; Kontagora Reservoir ; freshwater environment ; Stock assessment ; Catch statistics ; Fishery surveys ; Landing statistics ; Seasonal variations ; Stock identification
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  • 23
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    Status of fisheries and aquaculture development in Ekiti State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23340 | 19325 | 2018-04-07 17:19:26 | 23340 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Ekiti State has limited water surface area but blessed with some rivers and seven big reservoirs on which some artisanal fishery is being carried out by over 400 fisher folks. Fish farming in Ekiti state is largely dominated by Clarias gariepinus culture. Interest in fish farming is on the increase as farmers construct concrete fish tanks as small as 1.5m2 as well as series of contour earthen ponds or tanks as big as 30m2. The total number of ponds has grown numerically from 96 at the inception of the state in 1996 to about 2000 in 2008. The move towards private/public partnership in aquaculture development will improve the economic and nutritional status of the region.
    Description: Includes:- 1 table.;3 figs.;5 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ekiti State ; freshwater environment ; Fish culture ; Freshwater aquaculture ; Aquaculture ; Artisanal fishing ; Fishery development ; Stock assessment
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  • 24
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    Economic analysis of fish in Baga-Doro fish market on the Lake Chad (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23342 | 19325 | 2018-04-08 11:28:41 | 23342 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study compares market performance and profitability of fish in Baga-Doro fish market. Respondents were drawn from a cross section of fish marketers in Baga-Doro fish market. Sixty marketers were selected through a system of random sampling. Data collected were on socio-economic characteristics, cost and returns, and problem associated with fish marketing in the study area. Structural questionnaire were the instruments used for data collection .Percentage were used to describe the socio-economic problems associated with fish marketing, while gross and marketing performance models were used to describe the profitability and marketing margin respectively. The result revealed that almost all the marketers are male, with wholesalers and retailers in proportion of 70% and 30% respectively. The age proportion of the fish marketers comprises mostly of men above 45years of age, with 75% of the entire marketers population. Age between 35 and 44 covers about 20% of the population of the marketers, leaving the remaining 5% to age between 25 and 34. The gross margin was used to measure the profit level, which is expressed as: GM=sales revenue. -cost of Goods sold. Major problems faced were that of transportation and storage. The study recommends credit provision to purchase storage facilities and training workshops to increase awareness among others.
    Description: Includes:- 1 table.;5 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Baga ; Nigeria Doro ; Fish market ; freshwater environment ; Economics ; Fishery economics ; Marketing ; Market research
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    Women and sustainable fisheries exploitation (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23345 | 19325 | 2018-04-08 11:34:48 | 23345 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Sustainability in the extraction of fishery resource need to be proactively upheld if the achichment of the Millennium Development Goals (MDGs) will be anything to go by in Nigeria and other developing countries. The fishery resource, of the biotic component of the environment, and the main focus of this paper, is renewable resource whose existence if not for adverse environmental factors and natural specialization that occurs over thousands of years, is a continuum. The biological attributes of these fauna and flora render them amenable to usage in manners that still allows their continuous existence for the profit of mankind. Ignorance and the consequent inappropriate harvesting methods and uses of the fishery resource make them prone to abuse, imperilment, and eventual extinction. The influential and important roles of women as fishers, fishmongers. processors, concerned citizens of healthy living and organizers of the end use of the fishery resource put women in a vantage position to influence; thereby, enforcing conservation and sustainability in the extraction of the resource when trained in natural resource management. Consequently, women need to be trained and equipped with knowledge such as basic principles in these areas: biological attributes of the aquatic resources, measures of aquatic resource management, and approaches such as co-management, , communitybased and ecosystem-based approaches to fishery management; including simplified principles embedded within international instruments that form the legal frame work for resource management.
    Description: Includes:- 19 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; freshwater environment ; Women ; Fishery resources ; Resource management
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    Fish species composition in Igbedi Creek, Bayelsa State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23346 | 19325 | 2018-04-08 11:44:52 | 23346 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A preliminary survey of fish species composition in Igbedi Creek was carried out between July and September, 2007. Fish samples were collected from the fishermen's catches operating in the Creek and its distributary Ogoubiri River. Collected fish specimens were identified in the laboratory using standard identification keys. Thil1y-seven (37) fish species belonging to 17 families were observed. The most abundant families were the Mochokidae with seven (7) species which constituted 23.79% of the total sample collected followed by the Clariidae (10.78%) and Mormyridae (10.04%).
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Igbedi Creek ; freshwater environment ; Check lists ; Species diversity ; Biodiversity
    Repository Name: AquaDocs
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  • 27
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    Fisheries and aquaculture development in Nigeria: an appraisal (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23366 | 19325 | 2018-04-08 18:05:14 | 23366 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Nigeria has a coastline of 853km and over 14 million hectares of inland waters and thus owns significant fisheries. The contribution of fisheries to the Nigerian economy is significant in terms of supply of high quality dietary protein, income generation, creation of employment and enhanced inflow of foreign exchange earnings through shrimp export. However, due over-exploitation of the natural resources, by-catch and discard problem, inadequate infrastructure and social amenities development, inadequate supply of fish feed, fish seeds and slow adoption of new technology and management strategies etc. The domestic fish production (0.55 million tons) has fallen short of the demand (1.5million metric tons). Aquaculture development is the solution to the unpredictable production through capture or artisanal/industrial fisheries.
    Description: Includes:- 21 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; freshwater environment ; Aquaculture ; Brackishwater aquaculture ; Freshwater aquaculture ; Marine aquaculture ; Aquaculture development ; Fishery development
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    Format: 174-178
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    Development of a model rotatory fish smoking kiln using agro-wastes as source of fuel (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23359 | 19325 | 2018-04-08 12:13:35 | 23359 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A model fish smoking kiln was designed and fabricated to use agro-wastes (sawdust, palm kernel shell and rice bran) as alternative to conventionally used charcoal (control) as fuel energy source for smoking fish. Clarias gariepinus was washed, brined and smoked in chunks or whole in the kiln. The smoking kiln has an estimated capacity of 40kg of fish/batch with six fish trays and 36 fish hooks. Heat transfer is by conduction and convection. The rotatory wheel and axle on which the fish drying trays were anchored ensured even distribution of heat. The kiln has 69.4% energy efficiency and drying period of 10 hours at an average temperature range of 60 - 120degreesC, depending on the type of agro-waste used as source of fuel energy. The fuel conversion ratio, drying rates and calorific values of the different agro-waste products were also determined. Calorific value of the four agro-wastes ranged between 16.2MJ/Kg in palm kernel to 30MJ/Kg in charcoal. The drying rates of sawdust and rice bran compare favourably with charcoal and they produced smoked fish similar in dryness and quality with fish smoked with charcoal. Palm kernel had the least drying rate of smoked fish (weight/hour) during the 10-hour smoking duration.
    Description: Includes:- 3tables.;2 figs.;9refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Curing ; Processing fishery products ; Cured products
    Repository Name: AquaDocs
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    Reducing by-catch through fishing gear modification (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23379 | 19325 | 2018-04-10 16:39:49 | 23379 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: There have been considerable efforts in recent years to modify fishing gears and practices to target particular sizes and species of fish (fin and shell) and other marine organisms more efficiently. By catch consideration and gear modification play an important role in regulation of several major fisheries and new by-catch reduction devices and other innovative gear modification are continuously being proposed and tested to mitigate against these problems, among which are the turtle excluder device (T.E.DS) in the shrimp trawls to reduce mortality of endangered sea turtle; sorting grids and scaring device in long line fisheries. This paper assesses the incidence of by catch in fisheries, provides a review of successful developments and application of selective fishing techniques that have been used to achieve by-catch reduction. Recommendations were also made on effective monitoring of fishing gears to ensure that devices aimed at reducing by-catch are included and fishermen use only the appropriate gears to limit by-catch and discards.
    Description: Includes:- 3 tables.;4 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; By catch ; Gear selectivity
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    Application of holistic approach for sustainable fisheries: a case study of Kainji Lake Basin (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23383 | 19325 | 2018-04-10 16:47:20 | 23383 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The sustainability of the resources requires much more than paying attention to a single factor, rather looking at it in a holistic manner. Specifically, other economic infrastructure and resources that form the essential components of the fisheries system and fishers livelihood needs to be considered. This to a greater extend will permit choice and mobility of livelihood portfolios, hence reduction in fishing efforts and sustainability of the sector, which eventually translate into development of the sector. However, provision of these facilities are often capital intensive and often left for the government along to provide.
    Description: Includes:- 1 table.;1 fig.;8 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Inland fisheries ; Fishery development ; Fishery management ; Fishery resources ; Fishermen
    Repository Name: AquaDocs
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    Heavy metals and sensory evaluation of canned tuna fish (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23394 | 19325 | 2018-04-12 07:15:29 | 23394 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In this study, two heavy metals in canned tuna fish were determined after digestion by the AOAC methods. Mercury and Cadmium levels in canned tuna fish were determined by flame atomic absorption photometry. The results of this study indicate that canned tuna fish imported into the country have concentrations well below the petmissible FAO/WHO levels for these toxic metals. Their contribution to the body burden can therefore be considered negligible and the fish seem to be safe for human consumption. For the sensory evaluation, tuna flakes in vegetable oil (Starkist) from Ghana and light meat tuna chunks in sunflower oil (John West) from Thailand were the most preferred while tuna flakes in brine (John West) from Thailand is the least preferred.
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Fisheries ; Health ; Nigeria ; Lagos ; freshwater environment ; Heavy metals ; Processed fishery products ; Canned products ; Tuna fisheries ; Mercury ; Cadmium
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  • 32
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    Citric acid as preservative in smoked catfish (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23387 | 19325 | 2018-04-10 16:52:57 | 23387 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study was carried out to assess microbial quality of smoked catfish (Clarias gariepinus) treated with citric acid during 5-week storage at room temperature. Raw catfish were subjected to the following treatments for 5 minutes prior to smoking: 1-5% citric acid. The non-treated catfish served as control. The control samples showed diverse and high microbial load. All treated smoked sample were negative for E. coli and Streptococcus sp. and low in their TVC, coliform, staphylococcus and fungi and maintained these low count till the end of the 5th week storage. Treatment with 5% gave the best result but I and 2% citric acid are prefered by the consumers. Treatment with 2% was recommended as an acceptable concentration in preserving smoked catfish due to its effectiveness and acceptance by the consumers.
    Description: Includes:-2 tables.;1 fig.;14 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; New Bussa ; freshwater environment ; Preservatives ; Processed fishery products ; Cured products
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  • 33
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    Food habits of Muglids from water around Port Harcourt (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23343 | 19325 | 2018-04-08 11:31:00 | 23343 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The food habits of four species of Muglidae, consisting of Liza grandisquamus, L falcipinus, Mugil curema and , were investigated using the frequency of occurrence and numerical methods of analysis. Also, Relative Gut Length (RGL) of fish specimen measured was calculated from fish gut length. Generally, the food consisted mainly diatoms, blue - green & green algae and detritus. Other food items included annelid, crustacea, nematode, insect parts, dinoflagellates and unidentified organisms. M. curema had the least Species Richness Index (2.827) while L grandisquamus had the highest (4.088). The Shanon - Wiener Diversity Index ranged 0.91 in M. curema to 1.03 in L. falcipinus, while Shanon's Index (HI]) ranged from 2.095 (M. curema) to 2.372(L falcipinus).The male M. bananesis had the least mean RGL of 2.48 ~c 0.17 while female L. falcipinus and L grandisquamus had the highest mean RLG of 3.31 ~c 0.13. The food items observed and the RGL suggest that the muglids studied were herbivorous or omnivorous.
    Description: Includes:- 18 refs.
    Keywords: Ecology ; Fisheries ; Liza grandisquamus ; Liza falcipinus ; Mugil curema ; Mugil bananensis ; Nigeria ; Port Harcourt ; freshwater environment ; Feeding behaviour ; Food preferences ; Stomach content ; Food consumption ; Food composition
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    Finfish and shellfish composition in old and new Owena reservoirs (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23352 | 19325 | 2018-04-08 11:59:24 | 23352 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Finfish and shellfish fauna composition of the old Owena reservoir, established over 46 years old for drinking and domestic use in Akure metropolis, Ondo town and other villages were re-examined in 2008/2009 to assess long-term changes in relation to activities in the catchment which have included, another new reservoir constructed up stream in 2006. The pre-stocking assessment of the fauna of the newly constructed reservoir was determined. The degree of change between years in total abundance, numbers of taxa and community composition varied considerably between the two sites. These observed differences may be related to increased flora cover in the well established old reservoir, while the new reservoir is still empty with only tilapia as the predominant fish without established aquatic plants. Only one species of fresh water gastropod was found and identified in the new reservoir, while two species of gastropods and one bivalve were identified in the old reservoir. They were found in abundance within their standard length size range of OA2. - 12.5cm. A positive correlation (R2=0.9227) was obtained for samples collected from the' old reservoir, those from the new reservoir gave a contrasting value (R2=0.20 1).
    Description: Includes:- 1 table.;1 fig.;2 plates.;9 refs.
    Keywords: Biology ; Fisheries ; Nigeria ; Owena Reservoir ; freshwater environment ; Finfish fisheries ; Shellfish fisheries ; Check lists ; Species diversity
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    Morphometric and meristic characteristics of some shrimps species from Lagos and Ondo State coastal waters (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23351 | 19325 | 2018-04-08 11:55:34 | 23351 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Four different shrimp species; Penaeus monodon, Macrobrachiwn vollenhovenii, Macrobrachium felicinllm, Parapenaeopsis atlantica were collected from Lagos and Ondo states coastal waters and examined. The length (em), weight (g), head weight (g), tail weight (g), number of upper and lower rostrum teeth were determined. The species varied differently in weight ranging from 100.70g, 48.30g, 12.l0g and 9.20g for each species respectively. Length of 27.60cm, 18.l0cm, 15.70 and 10.40cm were recorded, head weight of 33.90g, 24.90g, 4.40g, 7.40g. Tail weight; 67.30g, 24.l0g, 7.70g and 3.20g were recorded. While the number of upper and lower rostrum teeth in P. monodon, M. vollenhovenni, P. atlantica, and M. felicinum were; 7-10/1-3, 11-14/3-5, 5-1110, 12-16/3-5 respectively. Penaeus monodon had the highest weight (l00.70g) but had rostrum teeth of 8/3. The result obtained for the species in homogenous subsets revealed that in weight (g), M. felicinum and P. atlantica falls into the same subset, while M. vollenhovenii and P. monodon fall into different subsets. In the length (em), all four species fall into different subsets. In the head weight (g), P. atlantica and M. felicinum fall into the same subset while M. vollenhovenii and P. monodon fall into different subsets. In tail weight, it was also applicable. In number of teeth on the upper rostrum all four species fall into different subsets and in number of down rostrum P. atlantica and P. monodon fall into different subset while M. vollenhovenii and M. felicinum fall into the same subset.
    Description: Includes:- 2 tables.;6 refs.
    Keywords: Biology ; Fisheries ; Penaeus monodon ; Macrobrachium vollenhovenii ; Macrobrachium felicinum ; Parapenaeopsis atlantica ; Nigeria ; Lagos Coast ; Nigeria ; Ondo State Coast ; marine environment ; Morphometry ; Length-weight relationships ; Shrimp fisheries
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    Effects of salinity on larval dimension of Tilapia guineensis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23422 | 19325 | 2018-04-25 19:24:46 | 23422 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Tilapia guineensis eggs were spawned and hatched in different salinities (17, 12, 7, 5, 2 and 0) ppt. The study was conducted in eight replicates. The aim of the investigation was to ascertain disparity in hatching size of Tilapia guineensis attributable to salinity. Immediately hatching was observed, body weight of five hatchlings in each replicate was individually weighed in milligramme. The individual total length of the five hatchlings was also measured in millimeter. The height of the yolk sac larva was determined with micro-metre screw gauge graduated in millimeter from the top of the yolk sac to the dorsal region of the larva. Data obtained were used to calculate yolk sac volume. Significant differences (P〈0.01) were observed in body weight and total length of larvae hatched in different salinities. The heaviest and longest larvae were hatched in 12 ppt saline water. The yolk sac volume of larvae hatched in lower salinities were significantly higher (P〈0.01) than the yolk sac volume of larvae hatched in higher salinities. The smallest yolk sac volume was recorded in 12ppt saline water. Our findings show that salinity could be manipulated for economic production of heavier seeds of Tilapia.
    Description: Includes:- 5 tables.;6 refs.
    Keywords: Aquaculture ; Chemistry ; Tilapia guineensis ; Nigeria ; brackishwater environment ; Salinity effects ; Larvae
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    Occurrence of Anisakids nematodes on frozen hake (Merluccius capensis) in Yenagoa market, Bayelsa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23419 | 19325 | 2018-04-25 19:19:35 | 23419 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Samples of the frozen hake (Merluccius capensis) were obtained once a week as corresponding to supply in Yenagoa Market Bayelsa State, Nigeria. From every supply of 10 cartons, 10 pieces of hake were examined for the presence of Anisakids nematodes. The incidence was concluded after sampling continuously every week for 8 weeks between September-November 2009. The highest parasite burden (13.2 ~c 2.28) was recorded in the second week and the lowest (8.5~c 2.9) in the 7th week, the highest mean weight of fish sample calculated was 134.80 ~c 19.16 gm in the 4th week and lowest in the 5th week with 118.30 ~c 3.56 g. The mean length was highest (29.10 ~c 1.90cm) in the second week and lowest (26.40 ~c 1.88 cm) in the 7th week. The percentage infection was 96.25% and very alarming since only 3 pieces were not infected as observed from all the samples examined.
    Description: Includes:- 1 table.;4 figs.;13 refs.
    Keywords: Fisheries ; Merluccius capensis ; Nigeria ; Yenogoa ; freshwater environment ; Parasites ; Parasite attachment ; Infectious diseases ; Frozen products ; Fish spoilage
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    Nutritive evaluation of enclosed salted-solar dried Oreochromis niloticus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23385 | 19325 | 2018-04-10 16:50:15 | 23385 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study investigated the effect of enclosed solar drying on the nutritive quality of unsalted and salted Oreochromis niloticus. Sensory and proximate evaluations were carried out on the salted and unsalted fish after drying. Acceptability, appearance, colour, odour, taste and texture of salted and unsalted fish differed significantly (P〈 O.05). The moisture, protein lipid and ash contents differed significantly (P〈 O.05. All dried fish samples from the enclosed dryers showed high levels of acceptability and protein content. However, fish samples brined at 25% and dried using Solar Tent Dryer had the highest acceptability and protein content.
    Description: Includes:- 1 table.;1 fig.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Processing fishery products ; Drying ; Nutritive value
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    Eutrophication as a challenge to sustainable capture fisheries: a case study of Oyun reservoir (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23378 | 19325 | 2018-04-10 16:38:47 | 23378 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: High concentrations of nitrate and phosphate from run-off of nitro phosphate fertilizers from nearby farmlands were recorded from Oyun reservoir, causing cultural eutrophication which affected the catch and fish assemblages; with high abundance of fish in the dry season and dominance of Cichlids while Heterotis niloticus and Barbus occidentalis were endangered. Management techniques to prevent extinction of its fisheries and sustainable exploitation of the fisheries such as watershed and construction best management practices (BMPs) to control eutrophication and fisheries conservation were suggested.
    Description: Includes:- 2 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Pollution ; Nigeria ; Oyun R. ; freshwater environment ; Eutrophication ; Water quality ; Physicochemical properties ; Nitrates
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    Design and construction of 2.14 m. LOA (one sheet) flat bottom canoe (punt) for pond activities (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23382 | 19325 | 2018-04-10 16:46:01 | 23382 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 2.14M length overall (LOA) flat bottom canoe (punt), was designed and constructed using locally available materials. The features of the canoe are least cost material, light weight, shallow draft and easy maneuverability. The canoe's light displacement (weight empty) was 28kg, which was less.than local canoe of same size. When placed on water a draft of 5.5cm was achieved which is 14.8% of its depth (37cm). The capacity of the canoe was 200kg, and the total production cost of N8, 700.00 which was, not beyond, the reach of an average fisher folks, or any fish farmer. The canoe was easily maneuvered when propelled by paddling as it floated at a shallow draft; this makes the canoe adequate for use on shallow water bodies such as ponds and reservoirs. Such easily maneuvered craft can also be used on pond or reservoirs for recreation which include, sport fishing, canoeing
    Description: Includes:- 3 tables.;2 figs.;4 plates;5 refs.
    Keywords: Fisheries ; Nigeria ; Boat construction ; freshwater environment ; Canoes ; Boats ; Surface craft
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  • 41
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    Design and construction of 1.5m coracle for pond activities (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23388 | 19325 | 2018-04-10 16:54:44 | 23388 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A coracle 1.5m (LOA) was designed and constructed using hardwood for the frame work and plywood for the base and side covering. It is oval in shape and after construction its light displacement was 24kg and with a dead weight (capacity) of I40kg (2 persons) with a cost estimate of N11,500. (US$83) When placed on water, it floated at a draft of 4.2cm and easily maneuvered by propelling with a paddle. The craft is characterized by light weight, portability, and ability to float at shallow draft. It could be used on shallow water body like ponds for aquaculture thereby increasing fish production.
    Description: Includes:- 2 tables.;1 fig.;4 plates.;6 refs.
    Keywords: Fisheries ; Engineering ; Nigeria ; New Bussa ; Boat construction ; freshwater environment ; Boats ; Construction ; Surface craft
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  • 42
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    Isolation, identification and prevalence of parasites on Oreochromis niloticus from three selected river systems (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23427 | 19325 | 2018-05-02 08:03:50 | 23427 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The prevailence of protozoan and helminthic parasite species occurring on and in the internal organs of Oreochromis niloticus were studied. Twenty samples of a mixture of adult and juvenile individuals of Oreochromis niloticus were randomly obtained from fishermen landing at the jetties of Epe water side, Ikorodu (Odoguyan) river and a brackish water (makoko), between September and and October, 2009, during a period of low rainfall. Samples were eviscerated and the parasites were excised, identified and each specie of parasites was counted. Most of the parasites encountered were of the Protozoa, manogenea, Digenea, Cestoda and Nematoda groups. The infestation was predominantly by Nematoda species and followed by protozoan species. Protozoan parasites like Trichodina sp and Ichyobodo sp were found to be prevalent, in varying magnitude, in most of the fish samples without clear age discrimination. The study reveals that the prevailence of parasites infestation increases with increasing length, size and age of the fish host and different pars of the fish.
    Description: Includes:- 6 tables.;11 refs.
    Keywords: Ecology ; Fisheries ; Oreochromis niloticus ; Nigeria ; Epe ; Nigeria ; Ikorodu ; Nigeria ; Ogun R. ; freshwater environment ; Parasites ; Identification
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  • 43
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    Functional roles of mangroves of the Niger Delta to the coastal communities and national economy (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23434 | 19325 | 2018-05-02 08:11:31 | 23434 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Mangrove swamps supply various goods and provide invaluable ecological services, especially as critical habitats for fish breeding. These functions are discussed in the context of rural livelihoods of coastal dwellers in the Niger Delta in particular, and the contribution to national economies in general. The decline in capture fisheries production in Nigeria is partly linked to massive mangrove loss in the Niger Delta. This provides basis for urgent evolution of effective mangrove conservation schemes in the Niger Delta and for focused research on the interaction between the delta mangroves and inland/coastal fish recruitment and production dynamics.
    Description: Includes:- 23 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Mangroves ; brackishwater environment ; Mangroves ; Fishery economics
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  • 44
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    The last standing mangrove forest ecosystem southeast of the Niger Delta (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23437 | 19325 | 2018-05-02 08:15:15 | 23437 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Standing on the abandoned jetty at Iwuochang / Upenekang fishing beach in 1999 [Ibeno LGA, Akwa Ibom State] and looking across the Qua Iboe River [en-route the Atlantic Ocean] were strips of luxuriant mangrove vegetation all around the estuary. Surprisingly, 10 years later still standing on the same jetty and looking across the same River also, all the vegetation round about the estuary are now replaced by nipa palms with pockets of mangrove plants. The fear of the paper is that, there may be crash in fish supply from the coastal waters of Nigeria in the near future. The time to act is now and FISON must be pro-active in this coastal re-construction and re-habilitation. Nigeria’s coastal water is a ‘food-basket’; much should be done to protect and jealously cherish it ? else, it may be the last standing mangrove forest ecosystem southeast of the Niger delta.
    Description: Includes:-14 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Akwa Ibom ; brackishwater environment ; Brackishwater environment ; Mangroves ; Fishery development ; Fishery management ; Mangrove swamps
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  • 45
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    Occupation and health hazards in Nigerian coastal artisanal fisheries (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23436 | 19325 | 2018-05-02 08:13:37 | 23436 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: There are more occupational and health hazards in the Fishing Industry than in other occupational categories in the world. In Nigerian Industrial Fisheries, safety measures are regulated while little attention is given to safety standards in the artisanal fisheries. In West Africa, the coastal artisanal canoe fatality rates have been given in 1991-1994 to be 300 to 1,000 per 100,000 fishermen. Thus, the fatality rate in Nigerian artisanal fisheries, (coastal states) has been estimated to be 999 to 3,329 per 100,000 fishermen. The high rate is due to piracy, boundary disputes between fishing communities, unemployment, societal low value for human life and human labour. The paper discusses the various types of accidents associated with artisanal coastal fisheries and give recommendations. Fishermen have rights to safe working conditions in their working environment just as workers in offices and factories on land.
    Description: Includes:-11 refs.
    Keywords: Engineering ; Fisheries ; Sociology ; ASE ; Nigeria ; brackishwater environment ; Hazards ; Navigational hazards ; Hazard assessment ; Health and safety ; Safety regulations
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  • 46
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    Mercury content of some canned seafood collected from Nigerian retail markets (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23444 | 19325 | 2018-05-02 08:30:46 | 23444 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Twenty samples of canned seafood consisting of tuna, mackerel, sardines, prawn and shrimp were collected from retail operations in Victoria Island, Lagos, Nigeria. Mercury content in these canned seafood were determined after digestion by the Association of Official Analytical Chemists methods. The mercury contents for all the canned seafood products have concentrations well below the permissible EU levels for this toxic metal. Their contribution to the body burden can therefore be considered negligible and the canned seafood products seem to be safe for human consumption.
    Description: Includes:-1 table.;13 refs.
    Keywords: Fisheries ; Pollution ; Nigeria ; freshwater environment ; Mercury ; Heavy metals ; Pollution ; Chemical pollution
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    Impact of oil exploration on fisherfolks' livelihood and safety of fisheries industry in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23443 | 19325 | 2018-05-02 08:29:36 | 23443 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: There have been many outcries in the Nigerian media on the various environmental degradation of the vast water space in the Niger Delta area of Nigeria by oil explorers. About 70% of the Nigerian populace lives in the coastal areas where the occupation is predominantly fishing and farming. For most of the publications, the extents of impact on the fishing industry are not addressed in order for solutions to be given. Production from the fisheries sector has dropped astronomically thereby earning the country a deficit due to importation of frozen fish to the country. In this study, a survey of three states (Bayelsa, Rivers and Delta) in the Niger Delta area of Nigeria was done. The communities studied include Ogulagha, Okobelema and Okpoama. Personal interviews with fishermen and primary data on the sector’s contribution to fish production and GDP were also carried out. The study aimed at finding out the sources and nature of degradation and the impacts such have on the fishing industry and the socio-economics of the fishermen. The study revealed that there are no significant difference in the negative impacts of environmental degradation caused by the activities of the oil companies on the socio-economics of the fishermen ((F2,27=0.59, P〉0.05)) The difference is not significant and the hypothesis is therefore accepted. The major impact on fishing was depletion in catches and low income earnings by fishermen with a resultant poor quality of living and livelihood. Oil spills, foreign vessels incursions and bunkering, vandalization of pipelines were identified sources of depletion in fish catches from the wild. The personal interviews and Focus Group Discussion (FGDs) showed that most heads of communities rely on the remuneration they get from the companies and refused to mobilize the fishermen for joint action against the oil companies. Mitigation measures usually carried out by the oil companies do not actually replenish the destroyed mangroves where breeding of fishes take place. The communities need the Government to institute high level surveillance of the high seas and monitor the activities of oil explorers as well as education of the communities on the effects of bunkering near shoreline.
    Description: Includes:- 1 table
    Keywords: Fisheries ; Pollution ; Sociology ; Nigeria ; Delta State ; Nigeria ; Bayelsa State ; Nigeria Rivers State ; brackishwater environment ; Degradation ; Pollution effects ; Oil spills ; Oil pollution
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  • 48
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    Bioaccumulation of heavy metals in freshwater Clarias anguillaris and Parachanna africana from Lake Geriyo in Yola, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23447 | 19325 | 2018-05-02 08:36:01 | 23447 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study was carried out to determine the bioaccumulation of heavy metals in Clarias anguillaris and Parachanna africana from Lake Geriyo Yola, Nigeria using energy dispersive X-ray fluorescence (EDXRF) spectrophotometer. The results in (mg/kg, dry weight) showed different levels of Cr, Cu, Mn, Fe, Ni, Zn, and Pb in the two fish species. The order of heavy metals accumulated by C. anguillaris and P. africana are Cr〉Fe〉Zn 〉 Mn〉Cu〉Ni〉Pb and Ni〉Fe〉Zn〉Cu respectively. The levels of Cr, Mn and Ni in C. anguillaris and in Ni in P. africana were higher than WHO and FEPA recommended maximum permissible limits (MPL) in fish, while the levels of Zn, Cu and Pb were below the standards. The results suggest that Lake Geriyo has high pollution loads of these heavy metals in fishes and could pose a health hazards to man. Consequently, close monitoring of heavy metal loads in Lake Geriyo is recommended with a view to minimizing the risks to health of the population that depend on the lake for their water and fish supply.
    Description: Includes:- 1 table.;13 refs.
    Keywords: Fisheries ; Pollution ; Clarias anguillaris ; Nigeria ; Geriyo L. ; freshwater environment ; Bioaccumulation ; Pollution effects ; Heavy metals ; Hazard assessment
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    Toxicity of African locust bean effluent on Oreochromis niloticus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23411 | 19325 | 2018-04-12 09:07:36 | 23411 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effects of 96 h sub-lethal concentrations of African locust bean effluent on Oreochromis niloticus were studied using plastic buckets. Packed cell volume (PCY) and histological study of gills and liver were the tissue chemistry parameters investigated. The control buckets contained no effluent. Results revealed increase in ESR (Erythrocyte Sedimentation Rate) decrease in haemoglobin, red blood cell and PCY Yalue of the fish exposed to all sub-lethal concentrations. Damage to liver and gills were noticed in some of the sub-lethal concentrations of all the effluent. Normal situation was observed in all the examined tissues of fish from the control buckets. The African locust bean effluent is toxic on O. niloticus and the lethal concentrations of African locust bean effluent deducted from the 96 hours acute toxicity effect ranged from 3ml.
    Description: Includes:-3 tables.;1 fig.;12 refs.
    Keywords: Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Akwa Ibom State ; freshwater environment ; Toxicity ; Sublethal effects ; Pollution effects
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    Effects of length of delay after slaughter (Lodas) on raw catfish Clarias gariepinus (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23418 | 19325 | 2018-04-25 19:17:12 | 23418 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of delay after slaughter on microbial quality, proximate composition and sensory scores of raw catfish, Clarias gariepinus was evaluated. A total of 52 live catfish (average weight 700.0~c7.0g) were used for the experiment. Ten freshly slaughtered fish samples each were selected for organoleptic assessment at 0, 4, 8 and 12 hours post-slaughter, while three fish samples each were selected for chemical and microbial analyses. Microbial load on fish samples increased significantly (P〈 0.05) with increase in length of delay after slaughter, LODAS. Bacteria isolated included Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Bacillus spp and Staphylococcus aureus. Percent protein and ash contents of fish samples increased with increasing LODAS, while moisture content decreased and lipid was not affected. It was observed that raw C. gariepinus retained most of its physical attributes up to 4 hours post-slaughter. These quality attributes except colour and odour of gills, deteriorated significantly (P 〈 0.05) at every successive four-hour post-slaughter interval. Significant negative correlation existed between LODAS and sensory quality of raw fish (eyes, r = -0.966, P 〈 0.05; gills, r = -0.980, P 〈 0.05; skin, r = -0.998, P 〈 0.01; and odour, r = -0.994, P 〈 0.01). This study established that quality of raw C. gariepinus deteriorated with increasing LODAS and that raw C. gariepinus was not totally unacceptable when delayed for 12 hours after slaughter at ambient temperatures.
    Description: Includes:- 5 tables.;17 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Lagos ; Proximate composition ; freshwater environment ; Organoleptic properties ; Fish spoilage ; Microbiological analysis ; Microbial contamination
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  • 51
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    Aqua-tourism potentials in some fishing sites in bitumen bearing wetlands of Ondo State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23433 | 19325 | 2018-05-02 08:09:53 | 23433 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 24-month survey was conducted during the wet (May- August) and Dry (October ?April) season of 2004 and 2006 along eight economic fishing sites in Ondo State bearing Wetland, with the aim of determining the abundance, species diversity of some ornamental species thus promoting ecotourism potential and preventing the loss of these species in the area during and after exploitation. The study was carried out in 4 study zones namely Odigbo (S1), Ode-Aye (S2), Okitipupa (S3), and Ilaje ese-odo (S4) noted for active bitumen seepage. Fishing potential of the area was assessed using catch per unit effort method as well as physico chemical analysis of water samples obtained from designated sites in the area in accordance with AOAC methodology. Fish compositions were assessed using multifilament gillnet, of different sizes hanging from 38 mm to 178 mm. The results revealed that the area is blessed with 24 economic species of fishes belonging to 13 families which could boost the tourist potential of Ondo State. The percentage composition of families identified varies as follows: Ariidae (2.04%), Anabantidae (3.27%), Bagridae (6.36%), Channidae (4.32%), Characidae (10.62%) Cichlidae (45.65%) Clupeidae (3.94%), Clariidae (11.78%), Hepsetidae (0.95%), Mormyridae (7.42 %), Malapteruridae (1.13%), Schilbiidae (1.76%), Polypteridae (0.76%). The family Cichlidae was the most abundant in the area during the study period. The diversity of fish during the study varied with locations and season .The study showed higher fish population during the dry season than raining season and lower population in study zones highly polluted by bitumen seepages. The study emphasizes the need for sustainable resource management during bitumen exploitation.
    Description: includes:- 2 tables.;1 fig.;12 refs.
    Keywords: Fisheries ; Nigeria ; Ondo State ; freshwater environment ; Fish consumption ; Tourism ; Recreation ; Stock assessment
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    Issues and constraints in the coastal fisheries of the Niger Delta area of Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23435 | 19325 | 2018-05-02 08:12:28 | 23435 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The Niger Delta serves as the economic nerve centre of the Nigeria Federation with its vast oil deposits. However the question is how far has the coastal fisheries thrived in the Niger delta since the discovery of crude oil? Fishing is the predominant occupation in the coastal communities. The Niger Delta is home to Nigeria’s oil industry. However, this ‘blessing’ has become a challenge for the people of the Niger Delta. They have suffered environmental devastation, economic poverty, and constant conflict. This paper discusses issues and challenges facing fisheries development in Niger-Delta area of Nigeria.
    Description: Includes:- 6 refs.
    Keywords: Fisheries ; Nigeria ; Niger Delta ; marine environment ; Fishery development ; Resource development
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    Toxicity of drilling fluid XP-07 on microbial load and survival of Oreochromis niloticus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23441 | 19325 | 2018-05-02 08:26:44 | 23441 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Static bioassays were carried out in the laboratory for 96h to investigate the effect of Parateq a synthetic base mud on the fingerling of Orechromis niloticus and their microbial population. The fingerlings were exposed to different concentrations (0, 1000, 3000, 5000 and 9000Mg/l) of drilling fluid. Fish mortality data were recorded at 24, 48, 72 and 96h and analysed using Finney’s Probit Analysis method to calculate LC50 values (concentration of drilling fluid in water that will kill 50% of the fish population in 96 hours). The 96h LC50 was 2210Mg/l.The mortality increased with increase in concentration, while, the lethal times decreased as concentration increased. The bacterial biomass ranged from 1.59 x 108 to 6.0 x 106CFU/ml while fungal biomass ranged from1.0 x 103 to 2.1 x 104 CFU/ml. Results revealed that there was an increase in fungal biomass with increase in mud concentration and a decrease in bacterial biomass with increase in mud concentration.
    Description: Includes:- 2 tables.;1 fig.;20 refs.
    Keywords: Biology ; Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Aluu Rivers State ; freshwater environment ; Toxicity ; Microbiological analysis ; Microbial contamination ; Pollution effects ; Chemical pollutants
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    Comparative analysis of physicochemical characteristics of ABU and Zaria Dam (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23440 | 19325 | 2018-05-02 08:25:12 | 23440 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physical and chemical parameters of ABU Dam and Zaria Dam were carried out between September and October 2009. The results obtained in the two water bodies were temperature 27.7 0C, pH (7.5 and 7.3), dissolved oxygen (5.8 mg/l and 5.0 mg/l), biochemical oxygen demand (1.74 mg/l and 2. 16 mg/l), alkalinity (58 mg CaC03/l and 49 mgCaCO3/l) P04-P (2.47 mg/l and 1.59 mg/l) NO3-N (3.67 mg/l and 3.47 mg/l), conductivity (54.70 ~ks-1 and 42.48 ~ks-1), total hydrocarbon (TH) (47.66 mg/l) and 48.00 mg/l) and total dissolved solids (32.68 mg/l and 25.35 mg/l) respectively. There was no significant difference in the mean values of the parameters (P〉0.05) except conductivity and total dissolved solids. The water bodies were found to be neutral with high conductivity. All the properties in the water bodies were in conformity with international standards both for drinking and aquatic life.
    Description: Includes:- 2 tables.;7 refs.
    Keywords: Chemistry ; Limnology ; Pollution ; Nigeria ; Zaria Dam ; Nigeria ; ABU Dam ; freshwater environment ; Physicochemical properties ; Pollution
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    Toxicity of herbicide Propanil on Oreochromis niloticus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23438 | 19325 | 2018-05-02 08:16:59 | 23438 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A static bioassay method to determine the acute toxicity of the herbicide propanil to Oreochromis niloticus was investigated under Laboratory conditions for 96 hours exposure period. Concentrations of propanil used include: 0.0096ml/l, 0.0103ml/l, 0.011ml/l and 0.012ml/l respectively. The lethal concentration (LC50) value of propanil on fingerlings of Oreochromis niloticus was 0.0097ml/l for 96 hours of exposure. The regression equation for probit kill from propanil was found to be Y = 29.84 + 12.33* log conc. (r2 0.9951, Y = Probit kill). Fish showed various abnormal behaviours upon exposure to propanil. Immediate reaction was erratic swimming and tendency to jump out of the test bowl. Others include: restlessness, un-coordinated movement, vertical swimming, air gulping, equilibrium loss, a period of quiescence and eventually death.
    Description: Includes:- 2 tables.;1 fig.;21 refs.
    Keywords: Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Markudi ; freshwater environment ; Toxicity ; Lethal effects ; Toxicants ; Pollution effects ; Fingerlings ; Herbicides
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    Relationship among Tilapia guineensis fingerlings abundance and water quality variations in a brackish water reservoir in Lagos (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23442 | 19325 | 2018-05-02 08:28:15 | 23442 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In recent times there has been an upsurge in the culture of Tilapia in Nigeria resulting in increased demand for the fingerlings which is hardly satisfied. This is due to increasing demand for table size tilapia as food fish and under-sized tilapia in the fish meal and fish canning industries in Nigeria. Collection of Tilapia guineensis fingerlings from the wild, to augment hatchery production, has been the practice and this is subject to environmental fluctuations. Multivariate regression and correlation analyses of accumulated data were used to investigate the effects of changes in water quality parameters on abundance of fingerlings of Tilapia guineensis in a brackishwater habitat in Lagos. Dissolved oxygen (DO), salinity and secchi transparency were found to be the most dominant factors affecting the abundance of Tilapia guineensis fingerlings in the Lagos lagoon. Peak period of abundance was closely associated with period of low salinity (0.50%o to 5.60%o), which coincided with the period of low transparency and low DO in the rainy season. The correlation analyses of Tilapia guineensis fingerlings with the water quality parameters yielded the following correlation coefficients (r)- 0.598; (salinity); -0.644 (transparency); -0.710 (DO); -0.566; (temperature) and 0.129 (pH). The abundance of Tilapia guineensis fingerlings in the Lagoon was ultimately defined by a suitable regression equation. This result is expected to optimize the collection of fingerlings of Tilapia guineensis from the wild and boost food fish security in Nigeria and elsewhere.
    Description: Includes:- 1 table.;1 fig.;( refs.
    Keywords: Chemistry ; Fisheries ; Tilapia guineensis ; Nigeria ; Port Harcourt ; brackishwater environment ; Water quality ; Fingerlings ; Chemical properties ; Physicochemical properties
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    Spatial and temporal variations of physicochemical variables in a small 'pristine' stream in Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23445 | 19325 | 2018-05-02 08:32:33 | 23445 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Spatial and temporal variations of physico-chemical variables of Onu-Iyi ?Ukwu stream were studied for 12 months from March 2005 to February 2006. Three sampling stations were established along the main stream channel from source to mouth. Spatial variation in physico-chemical parameters indicated that total alkalinity, total hardness, conductivity, and nitrate-nitrogen (NO3) recorded their highest values at the upper reaches (with values 14.0mg/l, 88.09mg/l, 17.00~kscmiscm, and 0.60mg/l respectively). Dissolved Oxygen (DO) and pH had their maximum values of 8.20mg/l and 6.94 at the middle reaches. Turbidity, biochemical oxygen demand (BOD), temperature and phosphate-phosphorus (PO4) increased steadily from source to mouth. The observed seasonal variation indicated that wet season values were higher for all the parameters except temperature, turbidity, phosphate-phosphorus (PO4) and total alkalinity although the values were not statistically significant at p〉0.05. The correlation coefficient (r) showed no significant relationships p〈0.05 between physico-chemical parameters except DO and BOD with correlation values of (0.75 and -0.54) respectively.
    Description: includes:- 2 tables.;1 fig.;17 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Onu-Iyi-Uku Stream ; freshwater environment ; Physicochemical properties ; Phosphates ; Phosphorus ; Turbidity
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    Effects of locust bean (Parkia bigtobosa) effluent on the histology of Clarias gariepinus juveniles (Burchell 1822) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23448 | 19325 | 2018-05-02 08:37:49 | 23448 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The poor nature of most Agricultural processing practices in Nigeria have had adverse effect on our environment, and our aquatic resources are of no exception. This study was conducted to ascertain the median lethal concentration of the effluent within the 96 hours period and also to ascertain the extent of damage on some of the histological characteristics of the Clarias gariepinus juveniles. Juveniles of the Clarias gariepinus (mean weight 30g) were exposed to varied concentrations of the locust bean effluent under the standard laboratory conditions. Data on mortality corresponding to the various concentrations were subjected to the probit and logit transformations and used to calculate the LC50 graphically. The result shows the toxicity of the locust bean effluent to Clarias gariepinus juveniles as 0.089mg/L (treatment 4) during the period of study. Exposure to both the acute and subletheal concentrations resulted in a number of physiological dysfunction of the test fish. Observation of the fish under the tests revealed unbalanced swimming patterns loss of reflex, rapid opercular movements and gasping for air. Histopathological examination of the gill and liver of the treated fish showed signs of damage, ranging from Hypoxia, lesions, necrosis, fibrosis cell stasis and hyperplasia at the sublethal levels.
    Description: Includes:- 2 tables.;1 fig.;22 refs.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Parkia bigtobosa ; freshwater environment ; Toxicity ; Lethal effects ; Pollution ; Histology
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    A brief examination of the food and biometric features of the grey mullet, Mugil cephalus (Linnaeus) from low brackish / fresh water lagoon (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23452 | 19325 | 2018-05-04 17:37:43 | 23452 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A total number of 166 specimens of Mugil cephalus caught from Epe Lagoon (low brackish/ freshwater) were examined for food and feeding habit and biometric features from November 2006 ? May 2007. The food of the species consisted mainly of algae (Bacillariophyta, Cyanophyta, Chlorophyta and Pyrrophyta) and detritus. The size range of fish examined were 12.4 ? 27.0cm (standard length) while the weight ranged from 22.40 ? 308.00g. The mean values of the biometric characters of Mugil cephalus did not reflect wide variations. The population dominant cohort in the lagoon represents the harvestable and marketable representative for a sustainable fishery and is a strong indication of potential for freshwater culture of this marine species.
    Description: Includes:- 2 tables.;1 fig.;23 refs.
    Keywords: Ecology ; Fisheries ; Mugil cephalus ; Nigeria ; Epe Lagoon ; freshwater environment ; marine environment ; Feeding behaviour ; Food preferences ; Biometrics
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    Limnological studies of Bosso dam and it's tributaries in Minna, Niger State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23449 | 19325 | 2018-05-02 08:39:20 | 23449 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physico-chemical parameters of Bosso Dam were analyzed weekly for a period of six (6) weeks from 29th October, 2009. In all, six (6) stations were identified within the dam. The physico-chemical parameters assessed were: temperature, dissolved oxygen, pH, alkalinity, hardness, conductivity and transparency. The results obtained from the analysis revealed slight variations in most parameters. There was no significant difference p〉0.05 in pH regardless of stations and weeks. But significant difference p〉0.05 were observed in dissolved oxygen, nitrate, temperature, conductivity, hardness, alkalinity, biological oxygen demand, transparency, in respect regard to stations. These variations could be due to influx of organic waste from surface run offs and inorganic waste deposited by man. The physico-chemical parameters observed, indicated that most of them fall with the recommended range or standard by the Federal Ministry of Environment
    Description: Includes:- 2 tables.;10 figs.;18 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Bosso dam ; freshwater environment ; Physicochemical properties ; Chemical properties ; Physical properties ; Water properties
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    Fish diversity in two reservoirs in Southwest Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23458 | 19325 | 2018-05-04 17:48:45 | 23458 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: This study investigated the fish diversity of Eko ? Ende and Owalla reservoirs, which are within the Osun river system in South West, Nigeria with a view to document biodiversity information needed for conservation and sustainable fisheries. Fish samples were collected monthly from the two reservoirs for one year, using a battery of multifilament gill nets. The data collected from each reservoir was analyzed for fish diversity. Information obtained on the forage / carnivore (F/C) ratio of fishes in each reservoir was used in measuring and comparing the ecological balance of the reservoirs. The results showed that eighteen fish species representing 16 genera and 10 families were identified in Eko ? Ende, while 17 fish species in 15 genera and 10 families were identified in Owalla during the period of study. Sixteen species (representing 84.2% of the total number of fish species) were common to both reservoirs and they were both dominated by Cichlids. Eko ? Ende Reservoir had greater fish diversity than the Owalla Reservoir. Shannon ? Weiner (H') index of fish diversity from Eko ? Ende reservoir was 2.37 while that from Owalla reservoir was 2.10. The forage / carnivore (F/C) ratios of the fishes from the two reservoirs showed that Eko ? Ende reservoir (F/C = 1.98) is ecologically balanced, while Owalla reservoir (F/C = 0.92) is not Owalla reservoir had a higher population of Hemichromis fasciatus (a predatory species). This reservoir also had more intensive fishing activities than the smaller Eko ? Ende reservoir. The study concludes on the need for a participatory research to alleviate the problem of ecological imbalance of fish species in Owalla reservoir.
    Description: Includes:- 4 tables.;28 refs.
    Keywords: Ecology ; Fisheries ; Nigeria ; Eko-Ende Reservoir ; Nigeria ; Owalla Reservoir ; freshwater environment ; Biodiversity ; Species diversity ; Check lists
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    Fatty acid composition of catfish (Clarias gariepinus) viscera oil (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23502 | 19325 | 2018-05-07 12:25:41 | 23502 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The fatty acid composition of oil extracted from the viscera of African catfish, Clarias gariepinus caught from a fish farm in New Bussa was investigated with a view to prove their usefulness. A total of 20 fatty acids were obtained out of which five were identified. Lauric, Palmitic and Stearic acids were the main saturated and monounsaturated fatty acids respectively. The principal acids in the polyunsaturated group were Oleic and Linoleic acids. C. gariepinus viscera is constituted of polyunsaturated fatty acids which make it a valuable pharmaceutical raw material rather than waste.
    Description: Includes:- 1 table.;10 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; New Bussa ; freshwater environment ; Fatty acids ; Polyunsaturated fatty acids ; Chemical properties
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    Proximate analysis of snakehead fish, Parachanna obscura (Gunther 1861) of the Cross River, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23509 | 19325 | 2018-05-08 15:33:45 | 23509 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: African snakehead, Parachanna obscura is being considered as an emerging aquaculture candidate in Nigeria. The species is very palatable and has a good fillet quality. Study was conducted on the proximate composition of the species from Cross River, Nigeria. Samples of snakehead were analyzed for protein, fat, moisture, crude fibre and ash contents. The protein content of the species ranged from 21.03-22.03 with mean value of 21.5%. The fat content ranged from 17.1-17.4% with a mean value of 17.2 %. Moisture content ranged from 51.1-52.0 % with a mean value of 51.7%. Ash and crude fibre contents were very low. The protein content of Parachanna obscura compares favourably with that of other members of the family Channidae. The fat content is exceptionally high, making the species a good healing and recuperating agent for post-natal and post-operation patients. We strongly recommend the culture of Parachanna obscura in Nigeria and its meal for growing children.
    Description: Includes:- 2 tables.;16 refs.
    Keywords: Fisheries ; Parachanna obscura ; Nigeria ; Calabar ; Proximate composition ; freshwater environment ; Proteins ; Body conditions ; Moisture ; Ash content
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    Lipid profile and blood by-products of deformed and healthy African mud catfish (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23507 | 19325 | 2018-05-08 15:28:31 | 23507 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Study was conducted to investigate lipid profile and metabolites in deformed (lost one or both pectoral fins) and healthy (both pectoral fins intact) African mud catfish C. gariepinus using three groups of adults male and female with a mean weight and standard length of 822.17~c 48.75g and 42.55~c.26cm respectively. The fish were allotted in replicates to 5000m capacity tanks based on the presence or absence of pectoral fins. 1mL blood was drawn from caudal peduncle of each fish by means of disposable sterile syringe and centrifuged at 1000rpm for 20min at 40C. Cholesterol and total protein were determined using the cholesterol FL (CT F400CH) and total protein (TP 0500CH) kits. Serum albumin and globulin concentrations were determined following methods described by Tietz (1995) and Buckley et al., (1976) while total serum bilirubin concentration was measured as outlined by AACC (American Association of Clinical Chemistry). Results indicate that male fish had relatively higher amount of triglyceride while female fish had higher amounts of cholesterol, reduction in globulin of the deformed fish, reduction in the concentrations of albumin in healthy fish, increase in total protein and globulin levels and high urea concentrations. No total bilurubin was detected in any of the fish sampled thus an indication of good liver function which means there was no liver dysfunction or liver damage in the fishes. It is evident therefore that abnormal fish can still perform better if they are given intense management because of the variability in their blood constituents with the normal fishes which is used to assess their health is minimal. Keywords: Blood, Cholesterol, Deformed, Healthy, C. gariepinus.
    Description: Includes:- 2 tables.;30 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; Badagry ; freshwater environment ; Lipids ; Blood ; Cholesterol ; Metabolites
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    Enforcement of inland fisheries regulations and law in Oyo State (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23514 | 19325 | 2018-05-08 15:41:07 | 23514 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The study assesses the enforcement of Inland Fisheries Regulations and Laws in Oyo State. This was done with a view to ascertaining the existence of regulations and laws that govern the inland waters of the state; the agents that are responsible to carry out the enforcement and the problems militating against the effectiveness of enforcement in the state, in order to provide relevant information for policy formulation and management of fishery resources. Information was gathered from secondary sources which include edicts for the state, journals and mass media reports. Personal interview with government fisheries officials and fishermen was also conducted. The research findings revealed that Oyo State has only fishing by-laws. The study also reveals that fishermen's co-operatives were the enforcement agents in the state. There was no record of arrest during the period of the study. Problems such as non- availability of surveillance and arresting equipment, lack of trained law enforcement fisheries officers were identified. The paper elaborates on possible management strategies of inland waters as a prelude towards increased fish production in the State.
    Description: Includes:- 11 refs.
    Keywords: Fisheries ; Law ; Nigeria ; Oyo State ; freshwater environment ; Legislation ; Fishery industry legislation ; Fishery regulations
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    Micro-credit: financing fish production in Nigeria - a review (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23516 | 19325 | 2018-05-08 15:44:14 | 23516 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Microfinance refers to loans, savings, insurance, transfer services and other financial products targeted at low-income people. Artisanal fishing is a crucial source of livelihoods in developing nations, particularly for low-income families in rural areas where job options are limited. Nigeria depends heavily on revenues from natural resources, especially oil hence income from fishing is particularly important to Nigeria. Aquaculture is also being practiced with a growth rate that has increased over the years. Sources of funding for the operators of these sectors of the economy who are mostly poor peasants will ensure sustainable production and income generation. Informal microfinance groups have existed before the advent of formal microfinance. Microfinance institutions in Nigeria operate in an environment that is dominated by commercial banks. However, their high deposit rate makes them attractive to the low income group. This paper examines the emergence of microfinance institutions, their contributions to fisheries and aquaculture and constraints to be overcome to enable them serve the fisheries and aquaculture sector better.
    Description: Includes:- 1 fig.;14 refs.
    Keywords: Fisheries ; Management ; Nigeria ; freshwater environment ; Financial institutions ; Financial resources ; Financing ; Fisheries ; Fishery economics ; Fishery management
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    Fish trading: a tool for socioeconomic enhancement and poverty alleviation (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23519 | 19325 | 2018-05-08 15:49:39 | 23519 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A study was conducted in Abeokuta, the Ogun State capital with the objective to investigate if fish trading could be a tool of poverty alleviation and socio-economic enhancement of the status of women in the household. A total of 120 correctly completed, structured and pre-tested questionnaires, out of the 150 administered to respondents, were retrieved for data analyses. Demographic data of the traders showed that all the respondents were women whose ages ranged from 15 to above 45 years. The ages of 33-45 years constituted 33.3% of the respondents while the age bracket of between 27-32 years constituted 23.3%. Majority (73.3%) were married while 25% were single-headed households (divorced or widowed). The study revealed that most of the respondents (approximately 61%) were able to meet their family expenditure jointly with their spouses while 28.3% of the respondents met the financial responsibilities of their families solely from the profit. Access to credit was found to be a major limitation. The study further revealed that 86.7% of the respondents would like to continue with the business because they were satisfied with the profit accruable to them from the trade.
    Description: Includes:- 3 tables.;19 refs.
    Keywords: Management ; Fisheries ; Nigeria ; Abeokuta ; Poverty alleviation ; freshwater environment ; Marketing ; Market research ; Women ; Fisheries
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    Policy and policy framework for growth of women's fisheries activities: accessing micro credit facilities for women in fisheries development as a fundamental human right (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23517 | 19325 | 2018-05-08 15:46:10 | 23517 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This paper begins with a review of policy issues on status of women’s fundamental human rights and the effects on their optimal participation in fisheries development. The focus of the paper is on the importance of women in fisheries activities within the fisheries industry. Issues pertaining to gender inequality in the rural communities affecting women in the fisheries sector, and solutions to overcome some of these issues are discussed. The degree of participation of women in the fisheries sector is an overall reflection of the cultures, the laws of the country and the priority given by the state to ensure gender equity. Generally, women in Nigeria, especially those from depressed fisheries households, participate actively in many fisheries activities, including aquaculture. However, the lower status accorded to women in many of the communities in Nigeria means that their contribution to fisheries is undervalued and unrecognized. Issues that need to be addressed with regards to participation of women in fisheries which include sensitivity to gender issues in fishery, improve living conditions, promote programs relating to women, reconsidering the practice of relating fishing rights to their right to speak and others are discussed in the paper The paper also looks at the possibilities of articulating measures in sensitizing the womenfolks through education, especially in knowing their fundamental human rights as specified by the UN’s articles, especially ability to access micro-credit in fisheries activities, the nature of loans and alternative strategies to tackle the problem of small-scale credit to women in fisheries development in the nation.
    Description: Includes:- 2 tables.;2 figs.;12 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Ibeju Lekki ; freshwater environment ; Women ; Fishery policy ; Financial institutions ; Financial resources ; Financing
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    Women's participation in lower Ikpa River fisheries of Akwa Ibom State, Nigeria: a case study of Ifiayong (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23523 | 19325 | 2018-05-09 12:27:39 | 23523 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Ifiayong is a small local village market where economically and commercially important fin and shellfishes are landed. It is located very close to the Five Star and Ibom Le Meridian Hotels at Nwaniba beach. Women functioned as transporters, sorters, processors, financiers, distributors and marketers of the thirty-two finfish families, seven shellfish species together with three turtles (reptiles) encountered at the study site. Socio-economic survey revealed that ninety-four women modally aged 46-55years (34; 36.17%) participated in the fisheries and frequently communicated in Efik (40; 42.55%), and were mostly drop-outs (40; 40.56%) in educational level and polygamous (35; 38.30%). The modal family size was 11-15 persons (45; 47.87%) who invested N 41,000 - N 50,000 (28; 29.79%). Problems encountered by these women together with the corresponding solutions and appropriate recommendations proffered were highlighted with the aim of making Ifiayong a revenue generating and tourism centre for Uruan Local Council and Akwa Ibom State Government.
    Description: Includes:- 1 table.;1 fig.;28 refs.
    Keywords: Management ; Fisheries ; Nigeria ; Ikpa R. ; freshwater environment ; Marketing ; Financing ; Women
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    Management implications of sex ratios of three palaemonid shrimp in the Cross River Estuary, south eastern Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23529 | 19325 | 2018-05-09 12:51:48 | 23529 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Information on sex composition of fish/shellfish species is important in determining reproductive potentials and estimating size structure of a given stock. Sustainable fisheries management options and policies usually rely on this aspect of the reproductive biology. In the present study, the sex ratios of three palaemonid shrimps, Macrobrachium macrobrachion, Macrobrachium vollenhovenii and Macrobrachium equidens were studied over an annual cycle with respect to gear type. Male: female relationship for M. macrobrachion caught with beach seine, pushnet and trap were 1:2.2, 1:2.1 and 1:2.15 respectively, while the M:F ratios for M. vollenhovenii were 1:1.27 (beach seine), 1:1.32 (pushnet) and 1:1.64 (trap). The overall M:F ratios during the annual cycle were 1:2.15 (M. macrobrachion), 1:1.47 (M. vollenhovenii), and 1:1.74 (M. equidens). The monthly sex ratios indicated that there were more females than males during the period, except for M. equidens which had a ratio of 1:0.78 in the month of August. This is advantageous for the stock dynamics of the species, especially if the males could mate with more than one female during any reproductive season.
    Description: Includes:- 1 table.;11 refs.
    Keywords: Biology ; Fisheries ; Macrobrachium equidens ; Macrobrachium macrobrachion ; Macrobrachium vollenhovenii ; Nigeria ; Cross River Estuary ; brackishwater environment ; freshwater environment ; Sex ratio ; Shrimp fisheries ; Reproductive cycle ; Population structure
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    Climate change: implications for fisheries and coastal aquaculture (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23531 | 19325 | 2018-05-09 13:01:07 | 23531 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A keynote address at the 25th annual conference of the Fisheries Society of Nigeria. The paper presented evidence of climate change in the past and discussed the issue of global warming in the past, present and future. The Greenhouse effects are some of the topics discussed. Discussed in greater detail is the Nigerian situation in the global warming and climate change. The potential impacts on aquaculture has been enumerated. The paper is concluded by given suggestionswhich mitigate the impact of climate change and called on the Federal Ministry of Environment to strengthen research and other arms of government to create a strong synergy to work towards ameliorating the impact of climate change in the country.
    Description: Keynote address at the 25th Annual Conference of the Fisheries Society of Nigeria. Includes:- 2 tables.;6 figs.;6 plates;12 refs.
    Keywords: Aquaculture ; Ecology ; Fisheries ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Climatic changes ; Fisheries ; Aquaculture
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    Shellfish resources in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23528 | 19325 | 2018-05-09 12:49:35 | 23528 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Nigeria is a coastal state with a coastline of 853km which lies between 4o 10’ to 6o20’N and longitude 2o 45’ to 8o 5’ E. The Nigerian coastline stretches from the Western border with the Republic of Benin to the eastern border with the Cameroon Republic. Some of the coastal characteristics which are of importance to the Nigerian inshore demersal fisheries are the presence of thirty-six estuaries and the prominent Niger Delta which provides suitable habitat for the penaeid shrimps, finfish and other living marine resources. Nigeria has a wide variety of shellfish resources ranging from the molluscs such as ark clams (Senila senilis), cockles costatum), periwinkle (Tympanotonus fuscatus) to the crustaceans which includes the penaeidae (shrimps), palaemonidae (prawns), portunidae (swimming crabs) and palinuridae (lobsters). Estimated potential yield for shellfishes is 51,760 metric tonnes. Shrimps and prawns have the highest commercial importance with production estimate between 10,000 to 15,000mt. More than half of this figure is exported to the Organization for Economic Co-operation and Development (OECD) countries with shrimp market valued at US $8.6 billion. Nigeria generated about US $54million in 2005 from export of shrimps and prawns alone. This figure decreased to about US $38million in 2007 due to harassment by sea pirates and militant groups thus decreasing production from 13,767mt in 2006 to an alarming 5,995mt in 2007. However more research needs to be done to ascertain the true potential yield and environmental carrying capacity of the Nigerian shellfisheries to determine the maximum sustainable yield (MSY) so as to prevent over exploitation and consequently the destruction of the fishery. Research should also be carried out on other shellfish resources such as crabs, oysters, periwinkles and lobsters as appreciable income could be earned from their sales and export.
    Description: Includes: 2 tables.;1 fig.;11 refs.
    Keywords: Biology ; Fisheries ; ASE ; Nigeria Coast ; marine environment ; Shellfish fisheries ; Crustacean fisheries ; Mollusc fisheries
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    Effect of smoking duration on the microbiological quality of cold-smoked Atlantic cod, Gadus morhua (Linnaeus, 1758) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23491 | 19325 | 2018-05-06 13:02:08 | 23491 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study evaluated the effect of varying smoking durations of 6, 6.5, 7 and 7.5 hours on the microbiological quality and percentage moisture content of cold-smoked Atlantic Cod, Gadus morhua. The fish sample were cold-smoked using the traditional drum oven. Four batches of the smoked fish were stored in metal baskets at ambient temperatures for a period of 12 days and assessed for Staphylococcus aureus and Escherichia coli loads, Mould count, Total Plate Count and Total Coliform Count. Analyses of the smoked fish samples were carried out at the initial stage (day 0) and subsequently every alternate days (i.e. days 2, 4, 6, 8, 10 and 12). Significant variations (P 〈 0.05) were obtained for all the microbial counts on the four smoked fish samples. The best microbiologically stable cold-smoked samples were that smoked at the longest duration of 7.5 hours. This produced the least mean microbial load range of TPC (1.50 x 103 - 2.00 x 105cfu/g); TCC varied from 0.0MPN/g to 12.0 MPN/g ; Mould count (1.32 x103 - 2.55 x 105 cfu/g) and Staphylococcus aureus (3.0 x103 - 1.35 x 105cfu/g) while percentage moisture content ranged between 25.3% to 15.2%. All the samples tested negative to Escherichia coli.
    Description: Includes:- 2 tables.;15 refs.
    Keywords: Fisheries ; Gadus morhua ; Nigeria ; Ogun State ; marine environment ; Microbial contamination ; Curing ; Processing fishery products
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    The opinion of fishermen and customers (fish buyers) on middlemen of Doro-Baga fish market, Borno State (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23518 | 19325 | 2018-05-08 15:48:25 | 23518 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study examined the opinion of fishermen and fish buyers on middlemen of Doro Baga fish market. 240 respondents were used as samples with the aid of structured questionnaire, using stratified random sampling technique. Descriptive statistics was used to analyze the data obtained. The study revealed that majority of the fishermen (75%) highly depend on these selling brokers to sell their fish for them because their financial support comes from the selling brokers, moreover they do not have a stand in the market. Among the fish buyers, especially those that buy directly for consumption, see the brokers as people that create confusion during transaction. But 55% of the fish buyers believed that brokers keep the business flowing through their support of the fishermen. While the major problem of the fishermen with the selling brokers is getting the loan from the brokers especially when the fisherman is new in the area or business and on the other side, brokers only give the fish buyers grace of two to three days when they don’t have money, after that the broker would sell the fish to another buyer. These problems can be solved when a strong relationship is established between the fishermen, selling brokers, and fish buyers, or when the government intervenes by giving loans to the fishermen.
    Description: Includes:- 3 figs.;3 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Doro ; Middlemen ; freshwater environment ; Fishermen ; Marketing ; Market research ; Pricing
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    Gender and fisheries of Lake Kainji, Nigeria: a review (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23515 | 19325 | 2018-05-08 15:42:14 | 23515 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper examined gender and fisheries of Lake Kainji, Nigeria. The study highlights socio economic characteristics of women involved in Kainji Lake fisheries, important issues about gender and fisheries. It reveals that the categories of women in the Kainji Lake fisheries are in the middle age of 31 to 40 years with very low educational background. It also indicates that fish processing has been the most prominent activity of women in fisheries of Lake Kainji and constitute about 60 percent of the women. The study concludes that women play significant roles in all aspects of fisheries in Lake Kainji. Importantly, women’s roles span reproduction and production.
    Description: Includes:- 1 table;! fig.;13 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Women ; Fisheries ; Processing fishery products
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    Length-weight relationship and condition factor of two Hydrocynus species in Lake Kainji, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23520 | 19325 | 2018-05-08 15:51:20 | 23520 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: In the study and understanding of fish biology, characterization and morphology, the length-weight relationship is of great importance. The genus Hydrocynus, is of high economic importance to the fisheries of Lake Kainji. This study investigated their length-weight relationship to establish the growth pattern of species within this genus. The ‘b’ values of the length-weight relationship for these species are less than 3. There was negative allometric growth (b〈3) for all samples of the Hydrocynus species. The correlation coefficients (r) are 0.9713 and 0.9888, for Hydrocynus forskali and H.brevis respectively. Condition factors ranged from 1.313 for H. forskali to 1.431 for H. brevis.
    Description: Includes:- 2tables.;2 figs.;27 refs.
    Keywords: Ecology ; Fisheries ; Hydrocynus forskalii ; Hydrocynus brevis ; Nigeria ; Kainji L. ; freshwater environment ; Length-weight relationships ; Condition factor
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    Challenges to meeting best procedure in quarantine services delivery (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23536 | 19325 | 2018-05-10 10:07:34 | 23536 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The paper defined quarantine as the totality of measures taken by every country to prevent the entry of foreign exotic pest, pathogens and diseases of plant, animals and aquatic resources through international boundries. Also discussed is the international regulatory framework on quality control and quarantine of agricultural products. The advantages and socioeconomics impact of quarantine are discussed. The paper further examined the best practice procedure in quarantine service delivery in the aquatic resources and products right from production, processing, marketing and condition for exporting of aquatic (Live fish) from Nigeria, In conclusion the paper enumerated the challenges in meeting best practice procedures in quarantine service delivery
    Description: Paper delivered at the Agricultural Quarantine Services (NAQS) Paramilitary Training for Officers and Men, Jaji, Kaduna, 15-29 ?, 2009 Presented at FISON EKO 2010: Other materials. Pagination on document pp. 1-18
    Keywords: Fisheries ; Health ; Nigeria ; Quarantine ; freshwater environment ; marine environment ; Quarantine regulations ; Legislation ; Safety regulations
    Repository Name: AquaDocs
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    Effects of ice storage on the biochemical composition of Macrobrachium vollenhovenii (Herklots, 1857) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23530 | 19325 | 2018-05-09 12:53:10 | 23530 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Changes in biochemical properties of freshwater prawn stored with two ice conditions Without Direct Contact with Ice (DCI) and Without Direct Contact with Ice (WCI) for day 0, 2, 4, 6, 8 and 10 were investigated. Proximate composition defined in terms of moisture increased for the DCI as storage days increases but relatively constant with treatments with WCI. Values of TVB-N (mgN/100g) in prawn stored with DCI had inverse relationship with storage days but increased with storage days in the WCI. Changes in the values of ash and crude protein were relatively constant as the storage days increased in both treatments. Ice treatments recorded little changes in between storage days for fats. Values of NPN mgN/100g decreased with days of storage with DCI but increased as the storage increased with WCI. These results obtained in this study showed that ice storage may have contrasting values and importance on the biochemical properties of the freshwater prawn.
    Description: Includes:- 2tables.;16 refs.
    Keywords: Fisheries ; Macrobrachium vollenhovenii ; Nigeria ; Badagry Lagoon ; freshwater environment ; Storage ; Storage effects ; Biochemical composition ; Storage life
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    Fisheries training in Nigeria's tertiary institutions - curriculum, staffing, equipment and other facilities: a critique of NUC’S minimum benchmark academic standards (MBAS) document (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23532 | 19325 | 2018-05-10 09:37:28 | 23532 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper is a review of the curriculum, staffing, equipment, field and laboratory requirements prescribed by the National Universities Commission (NUC) for training of Fisheries graduates. This is made as these are guidelines against which Fisheries programmes, now being proliferated in many Nigerian tertiary institutions, can be evaluated for possible accreditation. The critique shows that some courses are highly under-weighted e.g. “Aquatic Flora and fauna” as a 2 credit unit. There is a high degree of overlap between courses. Some are not clearly and sharply delineated, defined or described. Staff needs are not defined or described. Staff needs are not defined in terms of core course areas of specialization. Limnology & Oceanography have their descriptions restricted to physico ? chemical features and not viewed in the desired comparative perspective. Suggestions are made on a wider listing of equipment, field laboratory, and library need to sharpen the NUC guideline. A review committee is recommended.
    Description: FISON EKO 2010: Invited Paper. Pagination on document pp. 1-23 Includes:- 17 refs.
    Keywords: Education ; Fisheries ; Information Management ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Education ; Curricula ; Training ; Fisheries
    Repository Name: AquaDocs
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    Legal tools for combating piracy in Nigerian waters (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23535 | 19325 | 2018-05-10 09:53:19 | 23535 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The paper traced the evolution of piracy and pointed out that the fishing industry in Nigeria alone has recorded over 15 deaths and loss of vessels, equipments, fish/fishery products valued over N3 billion to these attacks between 2006 and April 2009. The paper further highlighted that between February 2009 and April 2010 the fishing industry has recorded about 80 attacks. These have affected the fishing industry which operated over 250 registered trawlers in 2003/2004 which has now been reduced to 150 trawlers. To ameliorate this problem the paper highlighted steps taken in dealing with the menace of piracy. The paper concluded that good laws are a necessary pre-condition for the achievement of maritime security. However, they will only be effective if there is the political will and the practical capacity among the government, relevant agencies and stakeholders.
    Description: FISON EKO 2010: Invited paper presented by N. Ahmed. Pagination on document pp. 1-13. First presented by M. Orakwusi at the 2nd Western Naval Command Law Seminar, 7 Oct 2010
    Keywords: Fisheries ; Law ; ASE ; Nigeria Coast ; Priracy ; marine environment ; Illegal fishing ; Fishery protection ; Fishing rights
    Repository Name: AquaDocs
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    Review of crude oil pollution effects on fish and fisheries of Nigerian waters (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24177 | 19325 | 2018-05-13 19:01:32 | 24177 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: This paper reviews some adverse effects of crude oil pollution on fish and fisheries in Nigerian waters. The main causes of spillage include blowout, sabotage, corrosion of pipeline, equipment malfunction, operations/maintenance error etc. There are spillage records from 1976 to 1997 with respect to the yearly oil spill incidents, the sizes of spill in relation to the ecological operational areas and the causes of oil spills in relation to sources of oil spill within oil operation. Based on the observation from the analyses of the spillage reports, several steps were recommended in order to reduce the incident of crude oil spillage in Nigeria petroleum industry for the safety of our fragile water bodies and the fisheries resources stock in them.
    Description: Includes: 3 tables.;Also includes: 14 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Niger Delta ; freshwater environment ; Crude oil ; Pollution effects ; Water quality ; Oil spills ; Pipelines ; Lake fisheries ; Oil pollution ; Pollution surveys ; Pollution control
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    Evaluation of slurry formulations for processing of kilishi of bony tongue (Heterotis niloticus, Cuvier) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24178 | 19325 | 2018-05-13 19:03:41 | 24178 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: The kilishi of Heterotis niloticus was produced for determination of appropriate slurry formulations for fish kilishi preparation. Thirty six freshly caught samples of H. niloticus with average weight of 306.20 ~c 18.33g, kilishi of this species was prepared with three different slurry formulations of high (F1), medium (F2) and low (F3) proportions of groundnut dough to spice mixture in the ratio of 1.3: 1.0, 1.0: 1.2 and 1.0: 1.8, respectively. Results of proximate composition indicated that kilishi of the H. niloticus prepared with formulation 3 (F3) recorded significantly higher (p〈0.05) protein content (54.22 ~c 0.01 %) and lower lipid content (8.00 ~c 0.00%), despite recording significantly higher (p〈0.05) moisture content (9.93 ~c 0.07%). Sensory score of kilishi of H. niloticus processed with F3 formulation rated significantly higher (p〈0.05) for taste, flavour and general acceptability with mean scores of 5.94 ~c 0.21,5.77 ~c 0.20 and 5.50 ~c 0.22, respectively. It could be concluded that kilishi of H. niloticus prepared with F3 formulation was the most acceptable hence, recommended for use in kilishi production.
    Description: Includes: 4 tables.;Also includes: 20 references.
    Keywords: Fisheries ; Heterotis niloticus ; Nigeria ; Sokoto ; Kilishi ; Heterotis niloticus ; Spices ; Proximate analysis ; Organoleptic assessment ; freshwater environment ; Freshwater fish ; Fishery products ; Processing fishery products ; Drying ; Packing fishery products ; Organoleptic properties ; Water content ; Enzymes ; Microorganisms
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    The role of biotechnology in aquaculture and fisheries development (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24204 | 19325 | 2018-05-16 15:29:46 | 24204 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: Biotechnology per se is not a panacea for the world's problems of hunger and poverty. However, genetic engineering in particular, offers outstanding potentials to increase the efficiency of animal improvement. Thus, biotechnology could enhance global food production and availability in a sustainable way. Case studies from Egypt and India also demonstrate that highly immune genetically modified fishes, transgenic fishes, chromosome engineering and gene banking are very appropriate for fish farmers and consumers in developing countries. As the entire technology can be packaged into the germ cells of fish, it can easily be integrated into traditional small-holder fish farming systems. Except for a few innovative transfer projects, though, the application of biotechnology until now remains concentrated in the industrialized world. Combined with insufficient own scientific and regulatory capacities, the increasing privatization of international aquacultural and fisheries research and the strengthening of intellectual property rights complicate the access of developing countries to biotechnology. Profound constitutional adjustments are therefore essential to ensure that biotechnology does not bypass the poor.
    Description: Includes: 15 references.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ebonyi State ; freshwater environment ; Biotechnology ; Sustainability ; Genetically modified organisms ; Gene banks ; Fish culture ; Aquaculture development ; Food security
    Repository Name: AquaDocs
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    Microbial load on smoked fish sold in Ibadan, Oyo State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24208 | 19325 | 2018-05-19 06:39:34 | 24208 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The microbial load of four different fish species from five different market locations in Ibadan metropolis were determined using standard microbiological procedures. The bacteria count of fish sampled from Ojo market was the highest while the bacteria count of the fish sample from Bodija market was the lowest. There was no significant difference (p〈0.05) in the microbial load of the fish sampled from various market locations in Ibadan metropolis. Similarly, there was no significant difference (p〉0.05) in the microbial load on various fish species sold in Ibadan metropolis. The isolated bacteria from the study were: E. coli, Salmonella spp, Klebsiella spp, Staphylococcus aureus, Aerosomonas spp, Pseudomonas spp, Vibrio spp, Serratia spp, Chromobacterium spp, Enterobacteria spp and Shigella spp. The fungi count of fish sampled from Omi markets was the highest while the fungi count of the fish sampled from Ojo market was the lowest. The following fungi were however isolated from the study: Aspergillus flavus, Penicillium spp, Fusarium oxysporum, Trrichoderma spp and Ceotrichium albidium. The study shows that reheating may be necessary to destroy or inactivate micro-organisms in smoked fish before consumption.
    Description: Includes: 2 tables and 2 figures.;Also includes: 17 refernces.
    Keywords: Fisheries ; Nigeria ; Ibadan ; Bacteria ; Fungi ; Market ; Fish species ; freshwater environment ; Microbial contamination ; Microorganisms ; Bacteria ; Freshwater fish ; Cured products ; Sample contamination ; Fungi ; Public health ; Quality assurance ; Disinfection
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    Morphometric features and proximate body composition of rocky freshwater prawn (Caridina africana, Kingsley 1882) at Erin-Ijesa waterfalls, Osun State Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24209 | 19325 | 2018-05-19 06:41:34 | 24209 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: An investigation was conducted on the morphometric features and proximate body composition of rocky freshwater prawn, Caridina africana occurring at Erin-Ijesa Waterfalls in Osun State, Nigeria. The adult prawns were collected at the first layer of the Waterfalls using scoop nets and locally fabricated sieves because of the shallow nature of the water body and tiny size of the species. Morphometric features were measured using measuring board and Vernier calipers while the proximate analysis was determined by atomic absorption spectrophotometry in the laboratory. The morphometric variables placed the species correctly into the Infra order Caridea and family Atyidae because the first and second chelipeds were shorter than the remaining three pairs of walking legs. Male prawns were significantly bigger (p〈0.05). than the females as revealed in the morphometric features. The proximate analysis showed that C. africana is composed of 58.79% protein, 5.42% lipid, 11.56% carbohydrate, 14.7% ash and 0.21 % crude fibre. The micro-nutrient composition included iron, zinc, copper, nickel and cadmium. The values for these nutrients make the study to suggest that C. africana could be a nutritive food bio-material for humans and other livestock nutrition especially the fin-fish aquaculture programme.
    Description: Includes: 2 tables.;Also includes: 11 references.
    Keywords: Biology ; Fisheries ; Caridina africana ; Nigeria ; Erin-Ijesa waterfalls ; Morphometrics ; caridina africana ; Proximate composition ; Micrinutrient ; Erin-Ijesa waterfalls ; freshwater environment ; Morphometry ; Biochemical analysis ; Shrimp fisheries ; Body conditions ; Nutritional requirements ; Nutritive value ; Lake fisheries ; Artisanal fishing ; Males ; Females
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    Heavy metals concentrations in Chrysichthys nigrodigitatus in Arakanga Reservoir, Abeokuta, Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24218 | 19325 | 2018-05-19 06:58:26 | 24218 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study investigates the morphometric and meristic features of Chrysichthys nigrodigitatus in relations to heavy metal concentrations. Varying sizes of Clarias nigrodigitatus were obtained with the help of fisher-folks, from Arakanga reservoir Ogun state, Nigeria. Water samples were also collected alongside with fish samples per week and five of the samples were sent to laboratory for analysis to determine the presence of four heavy metals in both fish and water. Lead, Cadmium, Nickel and Arsenic were investigated by atomic absorption spectrophotometer (AAS). Four tissues; gills, kidney, liver and muscle were compared with the level of metals in the water. Lower concentrations of metals were recorded in water except for Cadmium which is higher, than in fish. Lower concentration of heavy metals found in fish and water was less than that recommended by the World Health Organisation (WHO's) guideline for maximum concentration recorded in the tissue of the samples. Lead was found to be dominant in the gills of C. nigrodigitatus, while Cadmium was found to be highest in the water sample from Arakanga reservoir. There is significant difference (P〈0.05) in Nickel and Arsenic concentration in the tissues of C. nigrodigitatus and water. It was concluded that though the heavy metals of interest were present in measurable quantities, they were still within safe limits for consumption.
    Description: Includes: 11 references.
    Keywords: Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Ogun State ; Arankanga reservoir ; freshwater environment ; Heavy metals ; Freshwater fish ; Reservoir fisheries ; Artisanal fishing ; Lead ; Toxicants ; Pollution effects ; Quality assurance ; Morphometry ; Meristic counts ; Water analysis ; Freshwater pollution ; Nickel ; Arsenic ; Cadmium ; Fish consumption ; Health and safety
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    Food and habits of the Batrachoid, Batrachoides liberiensis off the Qua Iboe River estuary, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24223 | 19325 | 2018-05-19 07:09:15 | 24223 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: We studied the trophic attributes of the toadfish, Batrachoides liberiensis off the Qua Iboe River estuary Nigeria, between August 2008 and July 2009. The fish species has no well defined stomach; the intestine was used as gut. Gut contents analysis of 360 specimens of the toad fish revealed that 11 food items (Penaeus notialis, Sersama alberti, crayfish remains, unid fish, fish bones, fish remains, unid gastropod, insect remains unid clam and sand grains)] were ingested. The food items were re-assigned into 6 major ecological categories based on food ponderal index (%FPI): Pisces (FPI= 35.33%), Crustacea (FPI= 20.73%), unid Gastropoda (FPI=14.32%), Mollusca (FPI= 12.48%), Insecta (FPI= 11.64%) and FPI of 5.50% sand grains. Males were significantly higher in feeding intensity (Average gut fullness, AGF: t = 2.083, 358 df, P〈0.05) vis-a-vis the females. There were similarity in rank-order of the seasonal dietaries (spearman-rank correlation: rs = 0.871, P〈0.02). Sex ratio was male-biased. B. liberiensis in the Qua Iboe estuary is carnivorous, exhibiting affinity to piscine as major dietaries.
    Description: Includes: 11 references.
    Keywords: Ecology ; Fisheries ; Batrachoides liberiensis ; ASE ; Nigeria ; Iboe River. ; Batrachoides liberiensis ; Qua Iboe River Estuary ; Nigeria ; Trophic attributes ; brackishwater environment ; Food ; Feeding ; Stomach content ; Food consumption ; Artisanal fishing ; Fishery surveys ; Food composition ; Food preferences ; Brackishwater fish
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    Effect of zinc on the distribution of major cations and anions in the muscle of the fresh water catfish Clarias gariepinus (Burchell, 1822) collected from Ebonyi River, South East Nigeria (2021)
    Lagos (Nigeria) | FISON
    In:  http://aquaticcommons.org/id/eprint/24214 | 19325 | 2018-05-19 06:50:34 | 24214 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of zinc exposure evaluated during a four day exposure periods at 13.88ppm, 26.75ppm, 53.5ppm,107ppm and 214ppm to Clarias gariepinus sub-adults showed the 96h LC50 as 26.62ppm. The threshold value was 20.30ppm. The muscle of the exposed fish analyzed showed a significant decrease in all the major cations and anions (Na+, CL-, Ca2+ K+, Mg2+) at (p〈0.05). The research revealed that there was no total inhibition of uptake of the cations and anions and also that uptake of these metals, that is cations and anions (Na+,-CL-, Ca2+ K+, Mg2+) increased rapidly during the 24 hours and dropped at 48 hours and 72 hours and gradually increased at the end of 96 hours showing that it was time dependent. During exposure period, affected fish stood in upright position with their snouts above the water surface, gasping for air. Observation of the exposed fish showed that they were peeling of skin, increase in opercula movement, erratic swimming, quietness and finally death. This research therefore recommends that zinc should be applied appropriately at 26.30ppm to avoid death of fish, man and other aquatic organisms that are the chief consumer.
    Description: Includes: 13 references.
    Keywords: Pollution ; Fisheries ; Clarias gariepinus ; Nigeria ; Ebonyi State ; Ebonyi River ; Zinc ; Muscle ; Cations ; Anions ; Clarias gariepinus ; Zinc ; Freshwater fish ; Cations ; Pollution effects ; Trace metals ; Bioaccumulation ; Muscles ; Pollutants ; Anions ; River fisheries ; Lethal limits
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    Environmental impact of crude oil spillage at Agoubiri community in Southern Ijaw local government area of Bayelsa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24228 | 19325 | 2018-05-19 07:18:46 | 24228 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Assessment of the result of crude oil spillage that occurred at Aguobiri Community in Southern Ijaw Local Government Area of Bayelsa State in 2007, is presented in this paper. The results of the laboratory analysis of water samples for Total Hydro carbon content (THC) was 1.56mg/l, 2.94mg/l and 23.96mg/l at 300m,200m and 9m respectively from the spill point. Heavy metals values in plant tissues were Vanadium-2.1 4mg/kg, Nicke-4.06mg/kg and THC of 09,309.5mg/kg at 300m from the spill point. The values of heavy metals in soil samples were Vanadium 2.14mg/kg and Nickel4.19mg/kg and THC of 133,886.20mg/kg at 300m from the spill point. This is to buttress the fact that oil spill is not limited to the site of occurrence but spreads to affect flora life far away from the spill point. Consequently, this negatively impacts farming and fisheries activities in such areas.
    Description: Includes: 9 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Bayelsa State ; Crude oil spill ; Heavy metals ; Total Hydrocarbon ; Aguobiri ; freshwater environment ; Environmental impact ; Crude oil ; Oil spills ; Heavy metals ; Fisheries
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    Organoleptic assessment of processed freshwater clam (Galatea paradoxa) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24186 | 19325 | 2018-05-16 14:43:21 | 24186 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Organoleptic characteristcs and eating acceptability of different processed fresh water clam (Galatea paradoxa) from Bayelsa state, Nigeria was evaluated. One hundred and fourteen (114) samples of clam (Galatea paradoxa) used for the processing experiment were obtained from Amassoma market. All samples were processed traditionally viz: smoked-dried, cooked with banga sludge and fried respectively. Thirty six (36) member taste panel were randomly selected to evaluate the organoleptic characteristics of the samples. Acceptibility of product was scored on a 6-point hedonic scale. The highest ratings of organoleptic characteristics were recorded for fresh water clam samples prepared by frying (5.24 ~c 0.54) while the least (4.47 ~c 0.27) was recorded for samples that were prepared by cooking with water (P〈0.05). The results revealed that males had a preference for fried clam product while females had equal preference for clams fried and cooked in palm kernel sludge. The highest acceptability (88.89%) was observed in the samples that were subjected to frying method, while the least (80.56%) was recorded for samples that were smoked-dried. More research should be geared towards packaging these products for export.
    Description: Includes: 3 tables:;Also includes: 9 references.
    Keywords: Fisheries ; Galatea paradoxa ; Nigeria ; Niger Delta ; Acceptability ; Clams ; Organoleptic ; Processing ; freshwater environment ; Clam fisheries ; Shellfish ; Organoleptic properties ; Acceptability ; Processed fishery products ; Evaluation ; Cured products ; Acceptance tests ; Nutritive value ; Proteins ; Texture ; Odour ; Taste tests ; Freshwater molluscs ; Product development
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    Nutrient composition of frozen and smoked fish specimens of Oreochromis niloticus, Labeo coubie and Mormyrops deliciosus from River Niger (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24195 | 19325 | 2018-05-16 15:12:41 | 24195 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish is one of the most nutritious diet on earth, and contributes a considerable proportion of its protein to the Nigerian populace. Fifty-four specimens composing of six samples from each species, were analyzed in frozen and smoked states, monthly. Each set of six specimens were cut into two equal parts and randomly re-arranged into two groups. One group was smoked while the other was preserved in the freezer (at-2~'C) for 5 days. The highest moisture content was observed in frozen samples of Mormyrops deliciosus thus: (77.14 ~c 11.05%). Smoked O. niloticus had the highest protein content (26.79 ~c 0.74%) while the least was observed in frozen Mormyrops deliciosus (13.37 ~c 2.57%). Smoked samples of Oreochromis niloticus recorded the highest fat content accounting for a value of (25.97 ~c 0.51 %) while the least was observed in frozen Mormyrops deliciosus (7.97 ~c 0.45%). It could be concluded that while frozen samples loosed nutrient, smoked ones gained nutrients in all three species. The study recommends that fish be consumed in their smoked state, in preference to frozen ones, in response to higher nutritive value. Oreochromis niloticus which recorded the highest nutritive value in crude protein content, should be consumed more, followed by Labeo coubie and Mormyrops deliciosus in that order.
    Description: Includes: 2 tables.;Also includes: 10 references
    Keywords: Fisheries ; Mormyrups deliciosus ; Oreochromis niloticus ; Labeo coubie ; Nigeria ; Niger R. ; Nutrient omposition ; Frozen ; Smoked ; Oreochromis niloticus ; Labeo coubie ; Mormyrups deliciosus ; freshwater environment ; Freshwater fish ; Frozen products ; Cured products ; Nutritive value ; Comparative studies ; Processed fishery products
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    Trophic ecology of fishes: consolidating the basic (traditional) methods (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24226 | 19325 | 2018-05-19 07:15:01 | 24226 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Studies of food and feeding ecology are important to investigate trophic interrelationships of fishes in their resident water bodies. These are usually achieved using various important methods. However because no single measure gives an overall representation of the feeding habits of fish, best results are achieved only when methods are used to complement one another. This paper reviews various methods used in studying trophic fish ecology and suggests consolidation of the traditional or basic methods with relevant statistical indices and local ecological knowledge. More advanced methods are also proposed as valuable tools because they compensate for some possible errors that may arise from the use of quantitative methods.
    Description: Includes: 28 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Oyo State ; freshwater environment ; Ecosystems ; Trophic levels ; Interspecific relationships ; Trophic relationships ; Food ; Ecology ; Consolidation ; Methodology ; Feeding behaviour ; Stomach content ; Food webs ; Statistical analysis ; Fish culture
    Repository Name: AquaDocs
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    Migration in fishes: a review (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24232 | 19325 | 2018-05-19 07:26:04 | 24232 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A review of migratory activity in fishes reveals that migration is important for the completion of life cycle. Recent studies have increasingly demonstrated the wide spread existence of spatio-temporal variations in the abundance and distribution of species of freshwater fishes, previously assumed not to move between habitats. These movements are often for spawning, feeding and refuge, and in many cases are fundamental for the successful completion of life cycles. Chemical and physical changes in water environment affect the migration of fish. Most fish undertake feeding, breeding or wintering migrations. A number of studies have documented the influence of freshwater and ocean conditions, climate variability and human impacts resulting from impoundment and aquaculture on fish migration.
    Description: Includes: 27 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Borno State ; freshwater environment ; Migrations ; Geographical distribution ; Spatial variations ; Temporal variations ; Freshwater fish ; Life cycle ; Environmental conditions
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    Reproductive efficiency as a function of age in estuarine catfish, Chrysichthys nigrodigitatus of the Cross River, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24206 | 19325 | 2018-05-16 15:35:04 | 24206 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study was conducted on the reproductive efficiency of Chrysichthys nigrodigitatus of the Cross River. The objective was to determine the influence of age on eggs size and fecundity. Forty four females of Chrysichthys nigrodigitatus were sampled from April, 2011 to March, 2012. Fecundity and eggs size were measured in relation to fish size. The relationship between egg size and fish size produced a parabolic curve. This implies that younger fish and older fish were less efficient in terms of eggs size and quality while the middle aged fishes were more efficient in terms of eggs size and quality. Similarly, there was an inverse curvilinear relationship between number of eggs per unit weight and somatic weight of the fish. Younger fish are less efficient because of the physiology of growth, while the older fishes are less efficient because of reproductive senescence. Management strategy for the stock therefore requires the conservation of the middle aged individuals for increase in reproduction. Also in aquaculture the middle aged class should be used as broodstock for excellent results.
    Description: Includes: 2 figures.;Also includes: 13 references.
    Keywords: Ecology ; Fisheries ; Chrysichthys nigrodigitatus ; Nigeria ; Cross River ; Brackishwater fish ; Reproduction ; Efficiency ; Biological age ; Eggs ; Fecundity ; Size ; Food fish
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    Length-weight relationships and relative condition factor of twenty important marine fish species off Lagos coast, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24203 | 19325 | 2018-05-16 15:28:10 | 24203 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A study was conducted on the length-weight relationship and condition factor (k) of 6,254 fish samples representing 20 species belonging to 11 families of important marine fishes off Lagos coast, Nigeria. They were collected with a trawl net (cod-end 20mm mesh size), trawled at different depth ranging from 10m-100m between May and June 2009. The estimated 'b' value (regression coefficient) of the equation W = aLb ranged between 2.29 and 3.46 with mean and mode values of 2.78 ~c 0.28 and 2.79 respectively while the 'a' value (regression constant) ranged between -2.6019 and -0.9023 with mean value of -1.6899 ~c 0.40. The condition factor (k) ranged between 0.52 and 11.89 with mean values of 2.71 ~c 2.64. Fish species of Nigeria coastal water are dominated by Pseudotolithus senegalensis which is about 13.4% of the total fish samples and their growth trend is mostly isometric (exhibit dimensional equality of the body parameters). All the species studied are in good condition (k〉 0.5).
    Description: Includes: 1 table and 5 figures.;Also includes: 20 references.
    Keywords: Ecology ; Fisheries ; Pseudotolithus senegalensis ; ASE ; Nigeria ; Lagos Lagoon ; Lenght-weight relationship ; Condition factor ; Marine fish species ; Trawl ; Isometric ; Nigeria ; freshwater environment ; Length-weight relationships ; Condition factor ; Marine fish ; Trawl nets ; Coastal waters ; Fishery surveys ; Marine fisheries ; Check lists ; Population structure ; Dominant species
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  • 96
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    Influence of uptake route on the bioconcentration of polycyclic aromatic hydrocarbon (PAH) by the Red Sea bream (Pagrus major) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24244 | 19325 | 2018-05-20 05:41:08 | 24244 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish species have different responses to polycyclic aromatic hydrocarbons (PAHs) exposure to crude oil. Some achieve PAH biotransformation while others have bioconcentration. These trends may be specie-specific and may depend on PAH uptake route - through water or food. PAH uptake in the red sea bream, Pagrus major for PAH biomonitoring in Asian oil spill waters was assessed in water-borne and dietary exposures of the fish to four representative PAHS. In the water-borne exposure, juvenile fish of average weight 83g were exposed in a flow-through toxicity test for ten (10) days to a mix of 30~kg/L phenanthrene, pyrene, and chrysene; 3~kg/L of benzo[a] pyrene (B[a]P). In the dietary exposure, 20 juveniles of average weight 80g were fed diets with 10 n g/g phenanthrene, pyrene and chrysene, and 2 n g/g of B[a]P for ten days. Fish livers were sampled for PAH concentrations on days 0, 2, 5 and l0 in both exposures. Phenanthrene PAHs were accumulated in the water-borne exposure with concentrations increasing with duration of exposure. Phenanthrene had the highest concentration of 2210 ng/g on day 10, while pyrene and chrysene were 170 and 45 ng/g respectively. B[a]P was not accumulated. ln the dietary exposure, all the test PAHs were accumulated. Bioconcentration decreased with duration of exposure, unlike in the water-borne exposure which was the reverse. Phenanthrene, with an initial 58 ng/g concentration, was reduced to 10.6 ng/g on day 10. B[a]P accumulation in the dietary exposure is significant. PAH accumulation was higher in the water-borne exposure than in the dietary exposure and PAH bioconcentration in the fish depends on uptake route.
    Description: Includes: 13 references.
    Keywords: Fisheries ; Pollution ; Pagrus major ; Nigeria ; Makurdi ; freshwater environment ; Aromatic hydrocarbons ; Freshwater fish ; Crude oil ; Bioaccumulation ; Response analysis ; Biomanipulation ; Pollution monitoring ; Controlled conditions ; Toxicity tests ; Oil pollution
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    Influence of indices of reproduction on condition factor and some morphometric features of Tilapia guineensis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24246 | 19325 | 2018-05-20 05:44:32 | 24246 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The influence of indices of reproduction (Gonadosomatic index-GSI-and Hepatosomatic index -HSI-) on condition factor and morphometric features of Tilapia guineensis were examined using 160 fish comprising 70 females and 90 males. Total length, standard length and body depth were measured to the nearest 1cm, while each fish was weighed to the nearest 0.1 g. The gonads and liver were removed and weighed separatdy to the nearest 0.00lg. Gonadosomatic index, Hepatosomatic index and condition factor were calculated. Correlation analysis between the reproductive indices and the external features of the fish were carried out. Results revealed positive correlation between gonadosomatic index and body depth and between GSI and standard length in both sexes, indicating the dependence of gonadal development on body depth and standard length in both sexes. However, the relationship between the reproductive indices and total length was significant only in the female. The relationship between HSI and Standard length was also significant in female (P〈0.01, r = 0.707) and male (P〈0.05, r = -0.216), but in positive and negative direction-respectively. The correlation between the reproductive indices and condition factor were not significant in both sexes. The correlation of GSI and HSI in male (r = 0.062) was not significant, while the positive correlation of GSI and HSI in female (r= 0.300) was significant (P〈0.05). It was therefore concluded that body depth and standard length could be important factors in determining spawning success in both sexes, while total length may be an additional tool in determining spawning success only in female T. guineensis.
    Description: Includes: 24 references.
    Keywords: Fisheries ; Tilapia guineensis ; Nigeria ; Port Harcourt ; Condition factor ; Gonadosomatric index ; Hepatosomatic index ; Morphometric feature ; Spawning ; Tilapia guineesis ; freshwater environment ; Reproduction ; Condition factor ; Morphometry ; Freshwater fish ; Sex ; Gonads ; Spawning ; Length-weight relationships ; Gonadosomatic index
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  • 98
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    Fish species composition/diversity of the Warri River, Niger Delta Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24240 | 19325 | 2018-05-20 05:30:49 | 24240 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Changes in water quality caused by industrialization and technological advancement, affect fishery resources. The Warri River like many other water bodies in Niger Delta, Nigeria are experiencing side effects in terms of pollutant build up cum destruction of fishery resources. This study investigated the fish species composition/diversity of the river in comparison to the baseline studies of previous researchers. Nine sampling locations were chosen including, Jeddo, NNPC Jetty, Nigeria ports Authority jetty, Main Warri market, Delta Steel Jetty, Shell Ramp, Udu Bridge/market Ugbolokposo and Agbarho.Fish species were collected from the respective nine Locations monthly for 24 months. Fish were obtained from landings of local fishermen every fortnight with prior arrangement. Highest diversity index of 3.48 occurred at shell Ramp/Globestar, while the least value of 2.63 was recorded at NNPC Jetty. The condition factor of most fish species in the study were above 1.0, though more species were better conditioned in location 1 (Jeddo). The catfish families probably due to their hardy nature were best conditioned of all families represented. Thirty four fish species recorded in this study compared to 91 species obtained in previous works of 1989 -1994 reflects a sharp drop in species diversity.
    Description: Includes: 18 references.
    Keywords: Fisheries ; Pollution ; Nigeria ; Warri River ; Fisheries resources ; Warri River ; Specie diversity ; Pollutants ; Niger Delta ; freshwater environment ; Fish ; Check lists ; Species diversity ; Water quality ; Industrialization ; Fishery resources ; Pollutants ; Condition factor ; Baseline studies ; Aquaculture development ; Technology transfer
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 349-352
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  • 99
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    Assessment of some heavy metals pollution in Clarias gariepinus in the vicinity of Lake Chad, Nigerian sector, using energy dispersive X-ray fluorescence (EDXRF) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24243 | 19325 | 2018-05-20 05:39:07 | 24243 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Globally, aquatic ecosystems are highly polluted with heavy metals from anthropogenic and terrigenous sources. The objectives of this study, is to portray the use of EDXRF for the analysis of heavy metal pollution in Clarias gariepinus. C. gariepinus were collected from Dumba, Lake Chad, Nigerian sector and analyzed with EDXRF with 〈sup〉109〈/sup〉Cd as excitation source of the samples. The concentrations of Cadmium, Chromium, Copper, Manganese, Iron, Lead and Zinc (Cd, Cr, Cu, Mn, Fe, Pb and Zn) in mg/kg were determined in C. gariepinus and were compared with World Health Organization (WHO, 1985) and Federal Environmental Protection Agency (FEPA, 2003) to ascertain the level of Cd, Cr, Cu, Mn, Fe, Pb and Zn in C. gariepinus from Dumba. The results indicated that C. gariepinus is polluted with Cr, Cu, Mn, and Pb when compared with permissible limit of WHO, 1985 and FEPA, 2003. Therefore, the consumption of C. gariepinus from Dumba may pose a health risk.
    Description: Includes: 12 references.
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Borno ; Chad L. ; freshwater environment ; Heavy metals ; Pollutants ; Freshwater fish ; X-ray fluorescence analysis ; Standards ; Acceptability ; Pollution effects ; Cadmium ; Chromium ; Copper ; Manganese ; Iron ; Lead ; Zinc
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 361-363
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  • 100
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    Length-weight relationship and condition factor of Citharinus citharus (Geoffroy Saint-Hilaire, 1809) from Lake Akata, Benue State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24247 | 19325 | 2018-05-20 05:46:20 | 24247 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Length-weight relationship and changes in the condition factor of Citharinus citharus of the Lake Akata, an ox-bow Lake of River Katsina-Ala, a tributary of River Benue was studied. A total of five hundred and five (505) fish samples were collected from May 2008-April 2009. Length-weight relationship of fish was estimated from the equation: W = a.Lb which was transformed to base 10 logarithm, and condition factor (k) was determined using the equation: K=100W/L3. Both sexes of C. citharus in Lake Akata exhibited negative allometric growth pattern. The combined length weight relationship of C. citharus sexes was LogW = - 1.7738 + 2.9044 LogL (r2 = 0.9527). The coefficient of determination for the Length-Weight relationship for both sexes of C. citharus in Lake Akata was strongly positive. The mean condition factor for the combined sexes was 1.37 ~c 0.02, but individually, female C. citharus were in better condition (1.44 ~c 0.03) compared to the males (1.29 ~c 0.02). The condition factor of C. citharus in dry season (1.37 ~c 0.03) was not significantly higher than that of (1.36 ~c 0.03) in wet season (p〉0.05). This means the fish species are living well in the lake as the 'K' value are greater than one.
    Description: Includes: 25 references.
    Keywords: Ecology ; Fisheries ; Citharinus citharus ; Nigeria ; Akata Lake ; Growth pattern ; Seasonal condition ; Citharinus citharus ; Lake Akata ; freshwater environment ; Length-weight relationships ; Condition factor ; Freshwater fish ; Lake fisheries ; Growth rate
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 374-378
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