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  • 1
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    Some potential occupational and environmental hazards associated with fish pond production in Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4035 | 424 | 2011-09-29 16:40:09 | 4035 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-28
    Description: The paper highlights the concept of information and the significance of environmental and occupational hazards associated with pond fish production in Nigeria and discuss the possible options for the ways forward. The major raw material used in fish production system is the organic manure (cow dung, poultry droppings, porcine manure etc) that serves as substrate for heterotrophic production of bacteria and protozoa, which act as food for zooplankton and the fish. The pathogenic organisms (viruses, bacteria, protozoa's, and parasites), are noted for the potential hazard to the fish handlers and consumers. Nine species from seven genera of bacteria associated with fish diseases are found to have association with diseases of human such as typhoid fever, bacillary dysentery and other gastrointestinal tract related problems. Also the environmental contaminants in pond fish production become important because of its significance to consumers' acceptance of the fish products
    Keywords: Health ; Pollution ; Aquaculture ; Environment ; Nigeria ; aquaculture products ; aquaculturists ; biological pollutants ; fertilizers ; fish ponds ; hazards ; human diseases ; microbial contamination ; organic wastes ; pathogenic bacteria ; pathogens ; quality control ; Bacteria Protozoa ; Viruses
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 264-272
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  • 2
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    Hatchery construction and its feasibility in the Nigerian economy (2021)
    In:  http://aquaticcommons.org/id/eprint/4039 | 424 | 2011-09-29 16:40:25 | 4039 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-28
    Description: Aquaculture drive in the Niger Delta has necessitated the springing up of various forms of hatcheries in Nigeria in the area. The hatchery level is high as most fish farmers now want to produce their own fingerlings for the stocking of their production ponds for culture to market (table) size. The paper shows that there is a lot of market in the Niger-Delta for fresh fish. Majority of the numerous fish farmers are not well empowered to breed and produce fish seeds especially species most loved and eaten. The rising cost of materials in the Nigerian economy has become a bottleneck in the construction of more fish hatcheries for fingerling production. However, the assistance of multinationals has become very necessary to enhance its feasibility to encourage better involvement in the fish hatchery works. One remarkable area where assistance is being felt by the communities in the Niger-Delta is in fish farming and more so in the supply of fish fingerling to top fish farmers by The Shell Petroleum Development Company of Nigeria Limited (SPDC), a multinational oil company in the area. Few fish farmers have benefited from this. If more hatcheries are available to service and provide the needed fingerlings to stock the available water bodies such as, home backyard ponds, the 0.74 million hectares of brackish water, 1.01 million hectares of perennial swamps, and other marginal land available for aquaculture and properly managed, it will yield between 2.5 and 10 metric tones of fish depending on the species stocked and bred
    Keywords: Aquaculture ; Nigeria ; fish ; hatcheries
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    Format: application/pdf
    Format: application/pdf
    Format: 292-296
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  • 3
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    The macroinvertebrate fauna of pools in the floodplain (fadama) of the Anambra River, Nigeria (2021)
    In:  library@fba.org.uk | http://aquaticcommons.org/id/eprint/4561 | 1256 | 2011-09-29 16:12:45 | 4561 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-04
    Description: The Anambra River is the largest tributary of the lower Niger River below Lukoja. Between the months of May and November the river is subject to seasonal flooding from heavy precipitation and land runoff into the drainage system. During the flood phase, pools form on the floodplains (known as the fadama) and these pools receive materials and biota from the main river channel. The biota often includes representatives of freshwater vertebrates (including fishes) and invertebrates. On this brief note, the authors report on the macroinvertebrates found during preliminary studies on four fadama pools during the non-flood season between December 1994 and April 1995. 523 specimens were collected, of which 86% were arthropods, 9% were annelids (mostly Tubifex and Nais) and a few leeches (Hirudo), and 5% were gastropod molluscs of the arthropods, 75% were insects particularly Hemiptera and Diptera.
    Keywords: Ecology ; Limnology ; aquatic insects ; flood plains ; ponds ; Nigeria ; Anopheles ; Chironomus ; Notonecta ; Ranatra
    Repository Name: AquaDocs
    Type: article , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 160-162
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  • 4
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    Assessment of consumer acceptance of kilishi of African carp (Labeo coubie Rueppell) and Elephant snout (Hyperopisus bebe occidentalis, Guenther) (2021)
    In:  http://aquaticcommons.org/id/eprint/4053 | 424 | 2011-09-29 16:28:31 | 4053 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: This study was carried out to assess consumers' acceptance of kilishi prepared from Labeo coubie and Hyperopisus bebe occidentalis in Sokoto. The organoleptic properties (texture, odour, taste and flavour) of kilishi in its fresh form and under storage for 16 weeks were determined. The mean scores for the organoleptic assessment (6.90 and 7.19 for kilishi of Labeo and Hyperopisus respectively) showed that fish kilishi was highly acceptable. Hyperopisus kilishi recorded slightly higher mean scores for the tested organoleptic properties. The declining pattern of the sensory assessment scores with length of storage indicated that the optimum storage period under the room temperature for kilishi made from the experimental fish species in the study area was 6-8 weeks. Further research on appropriate storage methods is desirable. However, preparation of fish kilishi could be explored as alternative preservation technique to reduce fish spoilage especially during the glut in supply and to diversify fish products
    Keywords: Fisheries ; Chemistry ; Nigeria ; fish utilization ; fishery products ; organoleptic properties ; processed fishery products ; Hyperopisus bebe occidentalis ; Labeo coubie
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    Format: application/pdf
    Format: application/pdf
    Format: 376-381
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  • 5
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    Resource utilization practices and sustainable development at the Lake Chad basin (2021)
    In:  http://aquaticcommons.org/id/eprint/4056 | 424 | 2011-09-29 16:28:45 | 4056 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: The paper examines the resource utilization practices of the Lake Chad in view of the need for sustainable development of the natural resources of the area, which are being recklessly exploited. The issues of obnoxious fishing practices, inappropriate agricultural practices, indiscriminate grazing, reckless fuel-wood harvesting, water pollution etc were discussed. There are clear indications that the current resources utilization practices are pushing the natural resources of the area beyond the limit of their regenerative capacity. This is traceable to institutional weakness and inadequate management strategies at the Lake Chad basin. Suggestions were made towards witnessing a change of attitude to resource use, exploitation and management strategies
    Keywords: Management ; Conservation ; Fisheries ; Pollution ; Agriculture ; Nigeria ; Lake Chad ; agriculture ; deforestation ; grazing ; land use ; pollution control ; resource conservation ; resource management ; utilization ; water resources ; water supply
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 409-415
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  • 6
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    Parents aspiration and youth perception to sustainable fisheries development in Kainji Lake basin (2021)
    In:  http://aquaticcommons.org/id/eprint/4064 | 424 | 2011-09-29 16:29:06 | 4064 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: Artisanal fisheries development in Nigeria, like in any other developing country of the world is characterized by subsistence level of operation using dugout canoe and paddle. This implies that parents and children constituted the labour in use since they only struggle for the upkeep of the family. A total of 240 questionnaires were used to solicit information from the respondents. This total was divided into 120 each for both parents and the youths respectively. Simple descriptive statistics such as frequency distribution and percentages were used to analyze their responses. Parents have strong aspiration for their children to succeed them hence, 78.3% of the parents expressed their aspiration for succession by the younger ones while 83.3% of parents tend to support their aspiration with persuasive strategies such as allowing their children to partake in fishing activities at will. On the part of the youth over 70% of them perceived fishing as a viable business where they can succeed their parents provided government can come to their aid in form of active involvement in the development of rural fisheries. It is therefore believed that fisheries development could achieve rapid improvement if the aspiration of the parents is balanced with perception of the youth and the government meets their expectation
    Keywords: Education ; Fisheries ; Sociology ; Nigeria ; Lake Kainji ; artisanal fishing ; fishery development ; potential yield
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    Format: application/pdf
    Format: application/pdf
    Format: 453-463
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  • 7
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    Environmentally induced physiological responses that determine fish survival and distribution: a review (2021)
    In:  http://aquaticcommons.org/id/eprint/4059 | 424 | 2011-09-29 16:28:58 | 4059 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: Limitation to an aqueous habitat is the most fundamental physiological constraint imposed upon fish, phrases such as 'like a fish of water', convey our acceptance of the general unsuitability of fish for terrestrial existence. The constraints that restrict fish to an aquatic habitat relate to respiration, acid-base regulation, nitrogenous excretion, water balance and ionic regulation. A fish not adapted for an amphibious lifestyle when removed from water, becomes hypoxic and hypercapnic and soon succumbs to respiratory acidosis because the problem of excretion of H super(+) and C0 sub(2) are more immediate than lack of oxygen. This happen because fish gills collapse in air, while the ventilator arrangements that moves an incompressible medium (water) oven them become ineffective
    Keywords: Fisheries ; Biology ; Environment ; Nigeria ; aquatic environment ; ecological distribution ; fish physiology ; habitat ; pisces
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 429-437
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  • 8
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    Evaluation of transferred fisheries technology in Kainji Lake basin (2021)
    In:  http://aquaticcommons.org/id/eprint/4066 | 424 | 2011-09-29 16:29:34 | 4066 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: Fisheries is important to Nigeria agricultural economy because it provides employment for fisherfolks (men and women fishers, fishmongers (fish traders), fish processors and fish farmers. It also supplies protein to the diet of Nigerians and it is equally a viable source of foreign exchange earning to the government.The estimated Nigeria population of 120 million consumes about 1.2million metric tones of fish and fish products annual. This justified the important role fisheries could play in nigerian diet considering that Nigeria has vast inland waters that cover an estimated total surface area of 199,580km super(2) and equally vast sea area of 25,000km super(2). In these waters the author claimed that there are diverse fish resources that are of economic importance in both inland and seawaters. FDF (2000) also estimated that the current annual yield of both inland and seawater put together is about 418,069,3 metric tones from artisanal fisheries and 23,720 metric tones from aquaculture. The shortage between the annual consumption level of 1.2million metric tones and annual yield of 418,069,3 metric tones is made available through importation. It is therefore of concern that given the level of current fish yield from the various fisheries resources the demand still exceeds supply. One wonders whether the production inadequacy is due to poor management of available fisheries resources or that improved fisheries technology that could aid increased production was not efficiently transferred to fish farmers. To answer these questions one need to examine the past and present extension policy in Nigeria as they affect dissemination of fisheries technologies
    Keywords: Management ; Education ; Fisheries ; Aquaculture ; Nigeria ; Lake Kainji ; aquaculture products ; aquaculture techniques ; education ; fishery management ; fishery products ; fishery technology ; lake fisheries ; resource management ; pisces
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 474-492
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  • 9
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    Investigation of nematode Eustrongylides larvae infections in mudfish Clarias gariepinus and C. anguillaris from Bida floodplain of Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4071 | 424 | 2011-09-29 16:29:59 | 4071 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: This is the first report and record of the determination whether mudfish Clarias were infected with the larvae of the nematode Eustrongylides. Also, documented the assessment of the socio-economic perceptions of three groups of fisher folks on the economy of infected mudfish Clarias fishing activities. Fifty-six (67.5%) of 83 mudfish Clarias caught by artisanal fisher folks were examined for the presence of the larvae of the nematode Eustrongylides. All the 8 sampled fishing localities in Bida floodplain of Nigeria had a mean intensity and abundance of at least 3 and 1 worm per fish per site, respectively. Two hundred and one (96.2%) of 209 worms recovered were from the musculatures at different depths resulting in undulations on the skin surfaces as grub-like presentations. The three groups of fisher folks assessed encountered economic losses from nematode infected mudfish Clarias which attract much debates or rejections during marketing due to its aesthetically displeasing appearance, faster deterioration, higher fragility in smoked form coupled with poorer taste compared to the wholesome ones. Infected female mudfish Clarias had higher worm burden than the males, for each fishing locality
    Keywords: Fisheries ; Biology ; Aquaculture ; Nigeria ; aquatic birds ; artisanal fishing ; fish ; fish diseases ; fish larvae ; flood plains ; Clarias anguillaris ; Clarias gariepinus
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 520-529
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  • 10
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    Contribution of haematological factors to the distributions and estimation of Eustrongyliides africanus larvae densities in Clarias gariepinus and Clarias anguillaris from Bida floodplain of Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4072 | 424 | 2011-09-29 16:30:01 | 4072 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: The contributions of hematological factors to the distribution and estimations of Eustrongylides africanus larvae densities in Clarias gariepinus and C. anguillaris of Bida floodplain of Nigeria were documented for the first time. The hematological factors making the most important contributions to the distributions of E. africanus larvae infections in clarias species are mean corpuscular haemoglobin concentration (MCHC), mean corpuscular haemoglobin (MCH), mean corpuscular volume (MCV) and neutrophils count, in descending order of magnitude; having the manifestations for the months of January, March, September, and December of the year being closely related. Five haematological factors (neutrophils, lymphocytes and eosinophils counts; MCH and MCV) having positive or negative correlation coefficient (r) between 0.50 and 0.85 contributed to the estimated of E.africanus larvae densities in the wild population of Clarias species
    Keywords: Fisheries ; Biology ; Aquaculture ; Nigeria ; fish diseases ; flood plains ; haematology ; larvae ; Clarias anguillaris ; Clarias gariepinus
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    Format: application/pdf
    Format: application/pdf
    Format: 530-538
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  • 11
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    Strategic partnership of stakeholders: a veritable tool for sustainable fishery resources in Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4073 | 424 | 2011-09-29 16:30:03 | 4073 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: Fishery resources are very important resource from the aquatic environment to the Nigerian economy. Stakeholders involvement in its management is highly important therefore, this paper proposes two frameworks against which sustainable fishery should be based, vis-a-vis stakeholders participation. The paper showed that decision-making involving stakeholders would enhance the goals of sustainable fishery development and create unity of purpose among various stakeholders
    Keywords: Management ; Fisheries ; Aquaculture ; Environment ; Nigeria ; aquatic environment ; fishery management ; fishery resources ; potential yield
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 539-545
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  • 12
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    Approaches towards increasing domestic fish production in Nigeria: "Fish for All" (2021)
    In:  http://aquaticcommons.org/id/eprint/4076 | 424 | 2011-09-29 16:30:07 | 4076 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: The paper critically examines the factors militating against domestic fish production in artisanal, aquacultural and industrial sectors in Nigeria. Approaches towards increasing fish production from all these sectors were suggested and discussed in line with the National Economic Empowerment Development Strategy (NEEDS) and Poverty Alleviation programmes of the Federal Government to meet the nation's fish protein requirement within the next three years
    Keywords: Fisheries ; Aquaculture ; Nigeria ; artisanal fishing ; fish ; fish culture ; fishery industry ; fishery products
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 563-571
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  • 13
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    Export potential of ornamental live fishes in Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4082 | 424 | 2011-09-29 16:30:50 | 4082 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: Nigeria is blessed with an abundant variety of fish species, some of which have been exported over the years. These fish species are taken either from the wild or cultured. Large quantities of fishes and fishery products are exported from Nigeria in different forms and which have been sources of foreign exchange earnings for the Country. An estimate value of exports in the fishery sub-sector stood at approximately U.S. $48.212,070 for shrimps/sole fish/cuttlefish/crabs and over U.S.$500,000 for ornamental live fishes
    Keywords: Fisheries ; Aquaculture ; Nigeria ; aquarium culture ; ornamental fish ; trade
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 589-596
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  • 14
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    Utilization of some aquatic macrophytes in Nigeria in-land water bodies: a review (2021)
    In:  http://aquaticcommons.org/id/eprint/4092 | 424 | 2011-09-29 16:31:17 | 4092 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: Aquatic vegetation is an essential component of the aquatic ecosystem with both positive and negative implications on the water body. Efforts are always made to curtail the excessive growth of aquatic plants in order to prevent them from becoming a nuisance in the ecosystem. One of the ways of solving such problem is the positive economic use of such plants. Utilization as a method of weed control within the aquatic ecosystem is considered to be one of the safest methods of weed control as this provides the riparian communities double advantages in terms of save environment and personal benefits of the plant. The flora diversity of freshwater and brackish environments posses a great potential to both man and higher animals alike. Due to this fact, this paper attempt to review the exploited and unexploited aquatic plants resources of many of ourwater bodies in Nigeria both economica/ly and socially, to the populace. Recommendations are also advanced for further studies that will enhance sound management of the resources for maximum benefits and sustainability
    Keywords: Ecology ; Management ; Fisheries ; Sociology ; Nigeria ; aquatic plants ; breeding sites ; inland waters ; plant control ; weeds
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 651-657
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  • 15
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    The role of fishermen cooperative societies in the development of fisheries resources on Kainji Lake basin, Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4095 | 424 | 2011-09-29 16:31:42 | 4095 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: Field survey was conducted to evaluate the role of fishermen cooperative in the development of fisheries resources in Kainji Lake. The study was conducted with aid of questionnaires administered in five fishing villages namely Monnai, Yuna, Kaya, Malale and Tunga Danbaba. Ten questionnaires were administered in each fishing village majority of the fishermen interviewed are between the ages of 20-40 years. The results of the educational background revealed that 60% of the respondents were knowledgeable only on Quranic education. Majority of the respondents (86%) was members of fishermen cooperative societies. Only 32% of the respondents indicated to have benefited for loan and credit facilities. Sixty-nine (69) percent of fishermen realized income of between N1, 000-N2, and 000 daily. The major problem facing fishermen cooperative includes lack of capital, lack of access to loan and credit facilities, shortage of adequately trained and well-motivated fisheries extension workers, inadequate fishing inputs and high charge of fishing license fees by Kainji Lake fisheries Management and Conservation Unit (KLFMCU). Recommendation was made on how to improve fishermen cooperative for the development of the lake fisheries resources
    Keywords: Management ; Fisheries ; Nigeria ; Lake Kainji ; cooperatives ; fishermen ; fishery resources
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    Format: application/pdf
    Format: application/pdf
    Format: 683-692
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  • 16
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    Effect of salinity on growth and survival of Clarias gariepinus (Burchell, 1822): Clariidae fry (2021)
    In:  http://aquaticcommons.org/id/eprint/4100 | 424 | 2011-09-29 16:31:54 | 4100 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: The effect of different salinity levels on the growth and survival of Clarais gariepinus fry was studied in indoor hatchery system for a period of three weeks. 1000 Clarias gariepinus fry of an average weight 0.37~c0.06g were stocked at 100 fry in five replicated 20 liters plastic bowls. Five salinity levels of 0.2, 0.4, 1.1, 2.1 and 4.2ppt were tested. The results indicated that significant difference P~.0.05 highest weight gain of 0.89~c0.05g was presented by fry in 0.2ppt medium. All fry raised in 4.2ppt died within 24 hours. No significant difference P~,0.05 in weight gain is presented in fry raised in 0.2ppt-2.1ppt. From this study, the weight gain decreases with increase in salinity. Also the survival rate decreases from 0.2ppt to 1.1ppt raised fry while the lowest significant difference P~.0.05 survivals were presented in fry raised in 2.1 and 4.2ppt. Based on these results and foregoing, salinity rate of 0.4ppt is favourable for growth and survival of C.gariepinus fry
    Keywords: Aquaculture ; Biology ; Nigeria ; fingerlings ; fish culture ; growth rate ; salinity effects ; survival
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    Format: application/pdf
    Format: 710-714
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  • 17
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    Haematological response of Heterobranchus longifilis fed varying dietary protein levels (2021)
    In:  http://aquaticcommons.org/id/eprint/4101 | 424 | 2011-09-29 16:31:55 | 4101 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: Hematological effects of feeding varying dietary crude proteins levels to one hundred and fifty (150) H.longifilis fingerlings was examined on biweekly basis. The fingerlings of mean weights 1.26g plus or minus 0.24g were stocked in eight hapa nets (1mx1m) at 15 fingerlings per hapa. Four experimental diets with crude protein; 35%, 40%, 45% and 50% coded diet 1-4 respectively were fed to the fish for 8 weeks. The blood sample was taken and examined for packed cell volume (PCV) total protein (TP) Hemoglobin (Hb), Serum album, Erythrocyte count (RBC), while blood cell (WBC) mean corpuscle volume (MCV) and mean corpuscle hemoglobin, concentration (MCHC). There was an increase in the values of the hematological indices studied with increase in protein inclusion levels. A higher positive correlation with no significant difference (P greater than or equal to 0.05) exists between the treatments RBC, WBC, Hb and TP. The best RBC (2.10x10 super(6) count/l). WBC (7.65x10 super(4) count/l), PCV (35.4%) and Hb (5.79mg/l) were presented in fingerlings fed 40% crude protein followed by 45% crude protein. The dietary crude protein of 40% is recommended for H. longifilis for sound and healthy condition
    Keywords: Aquaculture ; Biology ; Nigeria ; animal nutrition ; blood cells ; diets ; Erythrocytes ; feeding experiments ; fish culture ; haematology ; haemoglobins ; leukocytes ; proteins ; Heterotis niloticus
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    Format: 715-718
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  • 18
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    Determination and modelling of water quality parameter in Abuja metropolis (2021)
    In:  http://aquaticcommons.org/id/eprint/4096 | 424 | 2011-09-29 16:31:51 | 4096 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: This research work involves the determination and modelling of water parameter such as pH, temperature, turbidity, chloride, hardness. The result of the analysis was used as important operating variables to generate a model equation of pH, hardness, temperature, turbidity and chloride. The values obtained from the model equation were compared with those from experiment. On an average bases the values were close. These parameters can be used to monitor the extent of pollution of pond water and to monitor stress and diseases of fish. The experimental data of pH was in the range of 6.7 to 6.9 while the modelled result was also between 6.7 to 7.0. The turbidity experimental value was close to the modelled value also. The chloride value for the experimental data was in the range of 25.32 to 35.0. The total hardness value ranges between 4.5 to 65.1 mg/l while the modelled result ranges between 11.025 to 68.402 mg/l. The result was within the acceptable limit of world health organization standard on water quality parameter.
    Keywords: Fisheries ; Pollution ; Chemistry ; Nigeria ; fish diseases ; pollution ; ponds ; turbidity ; water quality
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    Format: application/pdf
    Format: 696-701
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  • 19
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    Factors influencing the emigration of juvenile Bonga from the Cross River estuary (2021)
    In:  http://aquaticcommons.org/id/eprint/4104 | 424 | 2011-09-29 16:32:28 | 4104 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-29
    Description: Studies were conducted to identify and quantify the proximate factors responsible for the emigration of juvenile bonga Ethmalosa fimbriata (Bowdich, 1825) from the Cross River estuary. A time series of bonga cpue, salinity, turbidity and plankton abundance was undertaken, juvenile bonga was abundant in the estuary when salinities ranged between 1 and 9ppt. at salinities outside this range, they were absent. We conclude that salinity is the proximate factor that initiates the emigration of juvenile bonga from the estuary
    Keywords: Fisheries ; Aquaculture ; Biology ; Nigeria ; Cross Estuary ; brackishwater fish ; plankton ; salinity ; turbidity ; Ethmalosa fimbriata
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    Format: application/pdf
    Format: application/pdf
    Format: 737-744
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  • 20
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    Financial analysis of small-scale fish farming enterprises to alleviate poverty in homestead (2021)
    In:  http://aquaticcommons.org/id/eprint/4107 | 424 | 2011-09-29 16:32:31 | 4107 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: This paper focuses on the financial analysis involved in setting up of fish farming on a small-scale in a homestead. About 0.5 acres of land was used for the construction of pond which as a stock of Clarias spp/ Heterobranchus spp and Tilapia spp at the ratio of one to three for a period of 12 months. The land/land development cost is N26,500.00, pond construction cost, N35,700.00, equipment cost, N2,650.00 and stock/Input requirement cost N155,727.00 while the revenue from sales is N376,000.00. A cash flow analysis is also calculated for the fish farm, which is N155,423.00 for first year cash flow, and appropriate profit/mosses were calculated for five-year production cycle of N1,036,515.00 million. At the end appreciable profit is realized from the enterprises. This type of enterprises is viable for small-scale farmers to practices and adopted for financial support for their family
    Keywords: Aquaculture ; Nigeria ; aquaculture economics ; aquaculture enterprises ; costs ; financing ; fish culture ; fish ponds
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    An analysis of Nigerian freshwater fishes: those under threat and conservation options (2021)
    In:  http://aquaticcommons.org/id/eprint/4110 | 424 | 2011-09-29 16:32:34 | 4110 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: The study assessed qualitatively the threat status of all nigerian freshwater fishes using such criteria as rarity, size at maturity, mode of reproduction, human population density, habitat degradation, pollution and range of each species among others. The biology of 48% (129n) of nigerian freshwater species is not well known. Of the 266 known freshwater fishes, 47 species represented 17% are critically endangered, 15 (5%) are endangered , 8(3%), are vulnerable while 23(8%) are near threatened. The paper suggests increased basic knowledge of threatened species and conservation policy along three lines public awareness, legislation and creation of national parks, aquaria and reserves as measures needed to ensure the conservation of the fishes
    Keywords: Conservation ; Education ; Fisheries ; Pollution ; Biology ; Nigeria ; check lists ; education ; environmental legislation ; freshwater fish ; geographical distribution ; life history ; nature conservation ; overexploitation ; pollution effects ; rare species ; refuges ; sanctuaries
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    The role of women in fisheries activities in some selected fishing villages in the southern zone of Kainji Lake basin (2021)
    In:  http://aquaticcommons.org/id/eprint/4111 | 424 | 2011-09-29 16:32:36 | 4111 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: Questionnaires containing 39 questions were prepared and administered to 50 women in ten fishing villages in the Southern Kainji Lake Basin to assess the level of women participation in fisheries activities. Results showed that 100% of the women interviewed were involved in fisheries activities and the following factors were considered. Age group between 20-30 years was 18%; 31-40 years; 30%; and above 40 years had the highest percentage of 40%. Also 98% of the women involve in fisheries activities were married while only 2% were not married. Muslin women constituted 82% while 18% were Christians. About 70% of Hausas were involved: no Igbos and Yorubas, while 30% were other tribes, which included Ijaws, Isokos and Urohobos. The percentage of women without education amounted to 62%, those women with Koranic education accounted for 22%, 14% had primary education while only 2% had secondary education. Few women were directly involved in fishing and statistical analysis showed that there was insignificant difference from village to village. All the women (100%) were involved in fish processing and storage (preservation) before sale. Only 26% of the women were not involved in fish marketing. Also 26% of the women made profits ranging from N500 to N1,000 per week, 24% make N1,000 to N1,500 per week, 12% made N1,500 to N2,000 and 38% made profit above N2,000. Statistical analysis showed that there was a significant difference in the profit made by the women (P〈0.05) from the foregoing, women were actively involved in all fisheries activities
    Keywords: Fisheries ; Sociology ; Nigeria ; Lake Kainji ; artisanal fishing ; fisheries ; women
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    Influence of number of valves on catch composition of a fishing pot trap (Lege) in River Rima, north western Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4117 | 424 | 2011-09-29 16:33:01 | 4117 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: Three types of prototype (Lege) traps with different numbers of entrance valves were evaluated in River Rima, north western Nigeria. The traps contained 4,6 and 8 valves, tagged 4-V, 6-V and 8-V respectively. The experiment was carried out in a randomized complete block design with one factor each replicated three times. Data collected on fish diversity, number, biomass and sizes were subjected to descriptive statistics and analysis of variance. The results of the catch composition showed close diversity index of 0.86 for 6-V, 0.80 for 8-V and 0.60 for 4-V Lege traps. However, the number (41%) and biomass (48%) of fish caught in the 6-V Lege trap were significantly (P〈0.05) higher than those caught in the other traps. There was no definite trend in the sizes (length and girth) of fish caught in the traps. On the basis of species diversity, and the number and biomass of fish caught, the 6-V Lege showed preference for adoption than the other two traps. However, further studies are recommended on the appropriate mesh size net for the trap in line with the provisions of fisheries edicts
    Keywords: Fisheries ; Biology ; Nigeria ; River Rima ; catch composition ; fishing gear ; gear construction
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    Feed conversion, protein efficiency, digestibility and growth performance of Oreochromis niloticus fed Delonix regia seed meal (2021)
    In:  http://aquaticcommons.org/id/eprint/4123 | 424 | 2011-09-29 16:23:45 | 4123 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: Oreochromis niloticus fingerlings (mean weight 5.27~c0.29g) were fed raw and boiled Delonix regia seed meals following standard procedures. The weight gain, specific growth rate (SGR), feed conversion ratio (FCR), protein efficiency ratio (PER), net protein utilization (NPU) were determined as growth indices. Diet formulated with seed boiled for 80 minutes showed significantly (P〈0.05) high values for the growth indices. Carcass nutrients composition were significantly (P〈0.05) higher than in the control (raw) diet. Delonix regia seed meal when boiled has high potential of being utilized efficiently by O.niloticus. The implications of the respective index in fish metabolism are discussed
    Keywords: Biology ; Aquaculture ; Nigeria ; animal nutrition ; diets ; digestibility ; feed composition ; feed efficiency ; feed preparation ; feeding experiments ; food conversion ; growth rate ; seeds ; Delonix regia ; Oreochromis niloticus
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    The survival and growth of hybrid Clarias gariepinus and Heterotis longifilis fed with live and frozen Dapthnids (2021)
    In:  http://aquaticcommons.org/id/eprint/4112 | 424 | 2011-09-29 16:32:54 | 4112 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: Six glass tanks, each containing dechlorinated tap water and stocked with 3-day-old Heterobranchus, larvae hybrid between, Heterobranchus longifilis (male and Clarias gariepinus (female) were administered two types of feeding trials viz: live and frozen Dapthnids. Each treatment was replicated three times. The larvae were each fed approximately 50 Dapthnids per feeding time for fifteen days. Morphometric measurements of weigh and total length were taken before and after the experiment, and water quality parameters were monitored throughout the experimental period. At the end of the experiment, fish larvae fed frozen, Dapthnids, showed higher survival rate than Heterobranchus fed live Dapthnids. Even though the statistical analysis revealed that there was no significant difference (P〉0.05) in survival. However, the Heteroclarias fed live dapthnids performed better in terms of growth rate than Heteroclarias fed frozen dapthnids. The statistical analysis did not show significant difference (P〉0.05) between the final length and weight of two treatments. Heteroclarias fed live dapthnids had higher length and weight than Heteroclarias fed frozen dapthnids. It was therefore concluded that based on this experiment there is the likelihood that frozen zooplankton (Daphnids) do not encourage growth of Heteroclarias, but improves its survival. However, it's suggested that frozen zooplankton can be used to supplement live zooplankton in situation of sacrcity
    Keywords: Aquaculture ; Biology ; Nigeria ; diets ; feeding experiments ; growth rate ; survival ; zooplankton ; Clarias gariepinus ; Daphnia ; Heterobranchus longifilis
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    The effects of brood stock size on the economy of catfish (Clarias anguillaris) fry production using the hormone induced natural breeding technique (2021)
    In:  http://aquaticcommons.org/id/eprint/4105 | 424 | 2011-09-29 16:32:29 | 4105 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: 89 ripe female brooders of the catfish, Clarias anguillaris (Body wt. Range 150g-1, 200g) were induced to spawn by hormone (Ovaprim) induced natural spawning technique over a period of 10 weeks. Matching ripe males were used for pairing the females at the ratio of two males to a female. Six ranges of brood stock body weights were considered as follows; 〈200g; 200g-399g; 400g-599g; 600-799g; 800g-999g; 〉 1000g and the number of fry produced by each female brooder was scored/recorded against the corresponding body weight range. The number of fry per unit quantity of hormone and the cost of production a fry based on the current price of Ovaprim (hormon) were determined so as to ascertain most economic size range. The best and most economic size range was between 400g-599g body weight with about 20,000 fry per ml of hormone and N0.028 per fry, while the females above 1000g gave the poorest results of 9,519 fry per ml of hormone and N0.059 per fry. For optimum production of Clarias anguillaris fry and maximum return on investment female brooders of body weights ranging between 400g-599g are recommended for hormone induced natural breeding exercises
    Keywords: Biology ; Aquaculture ; Nigeria ; breeding ; fish ; induced breeding ; selective breeding ; spawning ; Clarias auguillaris
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    Investment opportunity in improved fish smoker (IFS) as food security for artisanal women fish processors (AWOFPS) in Nigeria: a case study of Kainji Lake area (2021)
    In:  http://aquaticcommons.org/id/eprint/4041 | 424 | 2011-09-29 16:27:29 | 4041 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: The Improved Fish Smoker (IFS) was designed and constructed by NIFFR in collaboration with GTZ in 1997. After the on-station trials, five fishing villages with pronounced fishing activities were selected for the demonstration. The IFS and the traditional Smoking Kiln were compared in one of the fishing villages using Gross Margin analysis (GM) and productivity index to determine the profitability and productivity of the two kilns. It was found that the average income of IFS users at fully capacity was N5, 555.50 per day in a year N1.3 million would be realized. Conversely, the average income of the users of Traditional Smoking Kiln (TSK) was N649.00 per day and about N152, 150.50 would be realized in a year. From this estimate, it is evident that the IFS are more profitable than the TSK. Productivity index of the two kilns also revealed that the productivity of IFS is higher than the TSK. Thus, using the IFS would enhance the income of artisanal women Fish Processors (AWOFPS) and ensure food security for the household
    Keywords: Fisheries ; Nigeria ; Lake Kainji ; artisanal fishing ; costs ; cured products ; curing ; economic benefits ; equipment ; lake fisheries ; processing fishery products
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    Occupational practices and problems of rural artisanal fisherfolks in Oyan Dam area of Ogun State (2021)
    In:  http://aquaticcommons.org/id/eprint/4037 | 424 | 2011-09-29 16:40:22 | 4037 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-28
    Description: Artisanal Fish Societies constitutes one of the poorest societies in the developing world. Attempts to harness the potentials of the societies have often failed due to the enormity of the problem of poverty. This study was conducted in four major fishing villages namely; Abule titun, Apojola, Imama Odo and Ibaro in order to investigate the occupational practices and the problems of rural artisanal fisherfolks in Oyam's Dam, area of Ogun State. Eighty respondents were randomly selected among the artisanal fisher folks for interview using interview guide. The findings revealed that 43.8% of the fisherfolks are within active range of 31-40 years while 30% are within 21-30 years range. Also 31% had no formal education indicating a relatively high level of illiteracy among the fisherfolks while majority of the respondents practice fishing activities using paddle and canoe. It was similarly discovered from the study that the most pressing problems of the fisherfolks is the lack of basic social amenities like electricity, potable water, access roads, hospitals and markets. It is therefore recommended that basic social infrastructures be provided for the artisanal fishing communities in order to improve their social welfare, standard of living and the capacity to have a sustainable fishing occupation in the interest of food security and poverty alleviation
    Keywords: Fisheries ; Sociology ; Nigeria ; Oyan Dam ; artisanal fishing ; fishermen ; fishing gear
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    The impact of varying nutrient regimes in earthen freshwater ponds on the comparative ecology of diurnally occurring candidate live feeds (2021)
    In:  http://aquaticcommons.org/id/eprint/4115 | 424 | 2011-09-29 16:32:59 | 4115 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-29
    Description: The daytime composition and relative abundance of zooplankton species were studied in three treatments of two replicate earthen ponds each with nutrient sources and water replenishment regimes. Treatment -A (200m super(2) surface area supplied 900kgha super(-1) pig manure only). Treatment -B (200m super(2) surface area supplied 70kgha super(-1) month super(-1) pig manure, 50kgha super(-1) month super(-1) N.P.K. [15:15:15] and 30kgha super(-1) month super(-1) Urea) and Treatment-C (1500m2 surface area supplied 1150kgha super(-1) month super(-1) commercial grade 40% crude protein compounded feed). Water replenishment for Treatment A was daily tidal deluge from the New Calabar River while that for treatment B and C was from column-well and occasional rains. No zooplankton species were recovered from the pig-manure only treatment (A) while only Diffugia constricta and Difflugia urceolata were the two protozoans that occurred together in treatments B (combined fertilization) and C (compounded feed only) in contrast, Difflugia acuminate and three rotifers, Collurella uncinata, Diurella stylata and Keratella quadrata occurred only treatment B. similarly, Arcella arenaria, Arcella costata, Centropyxis aculeate, Difflugia pyriformis, Branchionus calyciflorus, Lepadella patella, Polyarthra trigla and Onchocanmptus mohammedi were recovered from treatment C. Arcella costata was the most abundant zooplankton in the entire experiment, while Arcella arenaria was very abundant in treatment C, Collurella uncinata was very abundant in treatment B. The inference is that combined fertilization of earthen freshwater ponds tend to be more suitable for the culture of rotifers such as Brachionus calyciflorus, popular in fish larva nursery, while those supplied compounded feed could be used to produce protozoans where desirable
    Keywords: Biology ; Aquaculture ; Nigeria ; fertilizers ; fish larvae ; fish ponds ; food organisms ; nutrition ; organic wastes ; zooplankton ; Arcella ; Brachionus calyciflorus ; Centropyxis ; Colurella uncinata ; Difflugia ; Keratella ; Lepadella patella ; Polyarthra trigla ; Protozoa ; Rotifera
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    Fish distribution in a small domestic water supply reservoir: a case study of Kangimi Reservoir, Kaduna, Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4124 | 424 | 2011-09-29 16:23:47 | 4124 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-30
    Description: A study of the composition and distribution of fish populations in the inshore, surface and bottom water habitats of Kangimi Reservoir showed that the most abundant family was the Cichlidae followed in order of abundance by the familiesCyprinidae, Schilbeidae, Mormyridae, Mochokidae, Characidae, centropomidae and Bagridae. Though the overall composition of families caught inn the three habitats did not vary significantly (P〉0.05) only family Cichlidae showed habitat preference: there was a preponderance of Cichlidae in the inshore water habitat (P〈0.05). The families Bagridae and Centropomidae were caught only in the inshore and bottom water habitats while the other families were caught from all habitats and showed no habitat preference. The dominance of primary and secondary consumers indicates high fish production potential under adequate management
    Keywords: Fisheries ; Biology ; Nigeria ; Kaduna River ; check lists ; population dynamics ; water reservoirs
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    Effect of darting phenomenon of African catfish Heterobranchus longifilis (Burchell 1822) on growth performance of Nile tilapia: Oreochromis niloticus (Linnaeus, 1758) (2021)
    In:  http://aquaticcommons.org/id/eprint/4131 | 424 | 2011-09-29 16:24:10 | 4131 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-30
    Description: Replicate Ponds of 0.02ha stocked at 500 catfishes with 20,000 tilapia/ha were used to assess growth performance of O.niloticus, average weight 50.4g with (i) darted catfish; H.longifilis (shooters) average weight 60.3g (ii) non-shooters of H.longifilis, average weight 35.4g. Final mean weight, mean growth rate, specific growth rate and food conversion ratio were 499.5g 26g/day, 1.36% and 5.58% respectively for O.niloticus stocked with longifilis (shooters) and 440.4g 2.3g/day 1.23% and 5.58% respectively for O.niloticus stocked with H.longifilis (non- shooters) and 246.9g, 1.2g/day, 0.93, 6.30% respectively for tilapia in monoculture. The least growth was noted for O. niloticus in monoculture while the best growth was recorded O. niloticus in polyculture with darted catfish
    Keywords: Aquaculture ; Biology ; Nigeria ; fish culture ; food conversion ; growth rate ; polyculture ; Heterobranchus longifilis ; Oreochromis niloticus
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    Effects of substituting fish meal with grasshopper meal on growth and food utilization of the Nile Tilapia, Oreochromis niloticus fingerlings (2021)
    In:  http://aquaticcommons.org/id/eprint/4135 | 424 | 2011-09-29 16:24:33 | 4135 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-30
    Description: The effects of substituting fish meal with grasshopper meal in fish diets on the growth, food utilization and survival of the Nile tilapia, Oreochromis niloticus (mean weight = 40.1g) were investigated. The results show that the best growth and food utilization were recorded in the fingerlings fed in the 10% grasshopper meal and 30% fish meal while the poorest growth and food utilization indexes were recorded with the 25% grasshopper meal and 15% fish meal. In general, at 10% inclusion, the fingerlings performed even better than the control (40% fishmeal and no grasshopper meal)
    Keywords: Aquaculture ; Biology ; Nigeria ; diets ; feed efficiency ; feeding experiments ; fish culture ; fish meal ; nutritive value ; Oreochromis niloticus ; Nile tilapia
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    GIS application to boost fish production in Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/4141 | 424 | 2011-09-29 16:24:45 | 4141 | Fisheries Society of Nigeria
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    Publication Date: 2021-06-30
    Description: The paper discusses the application of Geographic Information System (GIS) to fisheries management. The paper presents the importance of the emerging technology of GIS and how it can be utilized to greatly speed up and make more efficient location optimizing processes and how the technology can allow for a through examination of the many spatially variable factors which might affect or control fish production both from aquaculture and inland fisheries in Nigeria
    Keywords: Management ; Fisheries ; Aquaculture ; Nigeria ; fish culture ; fisheries ; fishery data ; fishery management ; GIS
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    Samudra Revista Núm. 83, Septiembre 2020 (2021)
    The International Collective in Support of Fishworkers (ICSF) | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/27166 | 25 | 2021-02-27 21:36:35 | 27166 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-26
    Description: Publicación virtual de un nuevo número de la Revista SAMUDRA en castellano. El último número de la Revista SAMUDRA, publicación cuatrimestral del Colectivo Internacional de Apoyo al Pescador Artesanal (CIAPA), se encuentra disponible en lengua española en:
    Keywords: Fisheries ; ICSF ; Samudra Report ; Small-scale fisheries ; Indonesia ; United States ; Brazil ; Malawi ; Ghana ; Indonesia ; Timor-Leste ; India ; Nigeria ; Pacific Islands ; COVID ; Food Security ; Southern African Development Community (SADC) ; Amazonian ; indigenous communities ; livelihoods ; vulnerability
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    Illegal fishing of inland water bodies of Nigeria: Kainji experience (2021)
    In:  http://aquaticcommons.org/id/eprint/17894 | 5610 | 2015-09-17 09:42:32 | 17894 | Wilolud Journals
    Details
    Publication Date: 2021-07-02
    Description: It is a common knowledge that illegal fishing which includes use of wrong gears, explosives, excessive exploitation of choice stocks, enhancement and stocking of water body and pollution has devastating effects on the critical biomass of fish biodiversity and livelihood activities associated with fishing. Efforts worldwide to arrest these menace are significant because it has been found that illegal fishing has made fishing non sustainable, resulted in poor fishermen catches, and exacerbated the use of illegal gears in an effort to a must catch. Conflict between fisher folk and policies has continued to generate different strategies in the control of illegal fishing. Some of these strategies at regional and National levels include creation and implementation of fisheries laws, fishing edicts, code of conduct for responsible fisheries, policing of inland water bodies, capacity building and capability through training of fishermen, creating necessary awareness, arrest and punishment of offenders. There are also other initiative on conservation and management of freshwater ecosystems which have interrelation with illegal fishing. This paper examines efforts in promoting and boosting the fisheries of Lake Kainji, through creating necessary awareness, campaign visits, radio programmes, gear control, reward systems, integration and diversification of livelihood activities, community based management and policing. It further analyses what is working, problems, and prospect of fisheries laws, the need to integrate factors of political policies, other global initiative on water management for people and nature. Recommendations on strategies including protection of fishing grounds, establishment of catch data base, integration of other intervention as alternative source of income to enhance livelihood, reduce fishing pressure, and capacity building of fisher folks, development of rules and regulations that is community based are highlighted.
    Keywords: Fisheries ; Illegal fishing ; inland ; Lake Kainji ; Nigeria
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    SAMUDRA Report No.83, September 2020 (2021)
    The International Collective in Support of Fishworkers (ICSF) | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/27105 | 25 | 2021-02-14 02:32:05 | 27105 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-24
    Description: This issue was designed as a special edition to complement ICSF's campaign celebrating the contributions of small-scale fisheries to nutrition and food security within a human-rights-based framework. As the SAMUDRA Comment notes, the COVID-19 pandemic reminds us of the connection between food, health systems, sustainable development and human rights, and offers an opportunity to build back and build forward better.The articles in this edition of SAMUDRA Report – from 10 countries in Africa, Asia, South America and Oceania – reflect on the pandemic's impacts on fisheries, and situates the components of food security in the lives and livelihoods of SSF in several countries.The individual articles are as follows:Indonesia: COVID-19 lockdown measures have struck small-scale fishersUnited States: COVID-19 relief measures have favoured industrial operatorsBrazil: COVID-19 threatens the lives and livelihoods of vulnerable indigenous communities in the AmazonMalawi: Fish is an unrecognized element of trade in the Southern African Development Community (SADC)Ghana: A study explored how access to affordable small fish will reduce hunger and improve nutritionIndonesia: The unique flavours of the East Java cuisine come from the traditional fish processing technique of pindangTimor-Leste: The island nation is closing the gender gap while also providing food securityIndia: Managed sensibly, inland water bodies can provide the country with sustainable food securityIndia: The use of fishmeal to grow shrimp is exporting the precious nutrition that India’s children deserveAnalysis: A roadmap is needed for the role of fish in the right to food and nutritionNigeria: More than COVID-19 itself, the lockdowns have hit the country's unorganized small-scale fishers harderPacific Islands: The push for 30 percent MPAs must not bypass the democratic route used by small island nations to improve fisheries and incomesAnalysis: The 1960 UN Conference on the Law of the Sea (UNCLOS) failed to reach agreement, with India, Chile and Ecuador playing decisive rolesSSF / Blue Economy: There is no reason to wait for consensus on what is justice before acting on injustice in small-scale fisheriesReview: An award-winning film captures the complexities of small-scale fishers and fish processors in West Africa
    Keywords: Environment ; Fisheries ; Sociology ; Samudra Report ; ICSF ; COVID-19 ; lockdown ; Indonesia ; Nigeria ; US ; Brazil ; Indigenous communities ; Amazon ; gender ; Timor-LEste ; Ghana ; Nutrition ; small-scale fisheries ; UNCLOS ; Malawi ; Southern African Development Communities (SADC) ; India ; Pacific Islands ; West Africa ; Fishing communities ; food security ; sustainable management ; income ; small islands ; conservation
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    Nigeria: a heavy blow (2021)
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/27118 | 25 | 2021-02-14 02:42:30 | 27118 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-26
    Description: More than the COVID-19 pandemic itself, the lockdowns to prevent its spread have harder hit Nigeria’s unorganized small-scale fishers. The COVID-19 pandemic has fundamentally struck all facets of life in affected countries and the small-scale fisheries (SSF) of Nigeria are no exception. The pandemic has hit the country’s small fishers both directly and indirectly. Small operators are the bulk of Nigeria’s fisheries sector. They account for 70 per cent of the domestic fish production, and sustain the livelihoods of millions of people in one way or another; the dependence on local fish species for economic and food security is evidently large. SSF provides an accessible, cheap and rich source of protein and essential micronutrients to the rural population. Their impact on social, economic and cultural spheres is immense.
    Keywords: Environment ; Fisheries ; samudra Report ; ICSF ; Small-scale fisheries ; livelihoods ; COVID ; fishing communities ; Nigeria ; fishing communities ; impact
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    Samudra Revue, No.83, septembre 2020 (2021)
    The International Collective in Support of Fishworkers (ICSF) | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/27165 | 25 | 2021-02-22 00:36:57 | 27165 | International Collective in Support of Fishworkers
    Details
    Publication Date: 2021-07-26
    Description: Le nouveau numéro de la revue SAMUDRA - publication quadrimestrielle du Collectif international d’appui à la pêche artisanale (ICSF) - est disponible en ligne sur. Il s’agit d’un numéro spécial qui vient s’ajouter à la campagne de l’ICSF visant à bien mettre en évidence tout ce qu’apporte la pêche artisanale en matière de nutrition et de sécurité alimentaire dans une démarche fondée sur le respect des droits humains. Comme le relève l’éditorial, la pandémie de Covid-19 « nous rappelle les liens forts qui existent entre notre alimentation et nos systèmes de santé, entre le développement durable et les droits humains. Le Covid-19 sera-t-il l’occasion de repartir de l’avant en mieux ? »
    Keywords: Fisheries ; ICSF ; Samudra Report ; Small-scale fisheries ; Indonesia ; United States ; Brazil ; Malawi ; Ghana ; Indonesia ; Timor-Leste ; India ; Nigeria ; Pacific Islands ; COVID ; Food Security ; Southern African Development Community (SADC) ; Amazonian ; indigenous communities ; livelihoods ; vulnerability
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    Type: monograph
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    Length-weight relationship and relative condition of Heterobranchus longifilis (Valenciennes) from Idodo River, Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/9050 | 115 | 2012-11-25 07:05:40 | 9050 | WorldFish Center
    Details
    Publication Date: 2021-07-01
    Description: Length-weight relationship parameters of Heterobranchus longifilis males, females and combined sexes are given. The samples were collected from Idodo River, with size ranging from 123 mm total length, L, to 936 mm L. The values obtained for the mean L by sex show that males were significantly (p〈0.05) larger than females. The results show that the slope (b) is significantly (p〈0.05) below 3.0 for the male, female and pooled sample. The species exhibit a negative allometric growth pattern. The relative condition of fish shows seasonal variation, with females generally being in better condition than the males.
    Keywords: Fisheries ; Length-weight relationships ; Nigeria ; Idodo River ; Heterobranchus longifilis
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    Common carp (Cyprinus carpio) breeding in Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/9078 | 115 | 2012-11-26 08:29:57 | 9078 | WorldFish Center
    Details
    Publication Date: 2021-07-01
    Description: The development of the common carp (Cyprinus carpio) breeding programs in Nigeria is discussed.
    Keywords: Aquaculture ; Selective breeding ; Hybridization ; Aquaculture techniques ; Nigeria ; Cyprinus carpio
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    Food and feeding habits of Synodontis nigrita from the Osun River, SW Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/9401 | 115 | 2012-10-10 07:22:04 | 9401 | WorldFish Center
    Details
    Publication Date: 2021-07-05
    Description: An investigation was conducted into the food and feeding habits of Synodontis nigrita from the Osun River near Epe, Lagos, Nigeria. The food items in the stomach of the S. nigrita covered a wide spectrum, ranging from various types of plankton to invertebrates and plants. A seasonal variation was also noted in the stomach contents of S. nigrita over the period of investigation. The predominant food items found in the stomach were Polycystis spp., Closterium spp., Oedogonium spp., plant tissues, insect parts and detritus. This suggests that S. nigrita is an omnivore.
    Keywords: Biology ; Fisheries ; Feeding behaviour ; Stomach content ; Food consumption ; Nigeria ; Synodontis nigrita
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    Type: article
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    Effects of crude oil and the fractions on the blood haemoglobin and neutrophil concentrations in Heterobranchus bidorsalis juveniles (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22997 | 19325 | 2018-03-05 09:06:04 | 22997 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Studies on the effects of crude oil and its fractions on the blood haemoglobin (HB) neutrophil (NP) concentration in the blood of Heterobranchus bidorsalis juveniles were carried out. Two study periods (toxicity and recovery) and four oil types (Bonny-light crude oil (BLCO), premium motor spirit (PMS), kerosene (DPK) and lubricating engine oil (lBO) at 1.00, 2.00, 4.00 and 8.00ml were used. There were significant differences (P〈0.05, p〈 0.01) on the HB and NP values in blood of fish samples. The elevated values of HB levels in fish exposed to 2.00,4.00 and 8.00m1 L-1 BLCC, 2.00ml L-1 PMS and DPK; and 4.00ml L -1 LBO over the levels in the control fish were in consonance with the results of other workers. Increases in NP values in fish exposed to the four oil types (BLCO, PMS, DKP and LBO) relative to the control could be part of the immunological attempts by the fish to mobilize the body's defence mechanisms. The relatively high percent mortality and low survival of H. bidorsalis juveniles exposed to 4.00 and 8.00mlL-1 concentration of the four oil types over the other concentration implied that these concentrations were probably lethal to fish existence.
    Description: Includes:- 4 tables.;23 refs.
    Keywords: Fisheries ; Health ; Pollution ; Heterobranchus bidorsalis ; Nigeria ; Delta State ; freshwater environment ; Crude oil ; Fish ; Toxicity ; Haemoglobins ; Lethal effects
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    An observation on the acquisition or loss of trematode (Clinostomum tilapiae) by Tilapia (Oreochromis niloticus) in culture systems (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23041 | 19325 | 2018-03-05 20:38:04 | 23041 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The acquisition or loss of Clinostomum tilapiae parasites by Oreochromis niloticus was studied. Four groups of 25 healthy fishes were stocked in the upper part of serial experimental ponds, while another four groups of 25 infected fishes were also stocked at the rear part of the serial experimental ponds. All the groups were fed at 3% body weight with the same compounded fish feed. Acquisition or loss of parasites and growth was monitored for a period of six months. The mean relative growth rate was 11.04kg/month for the healthy fishes and 5.62g/month for the infected fishes. The mean specific growth rate was 38.75% and 31.25% for the healthy and infected groups respectively. However the results were not statistically significant (p 〉 0.05). The parasite did not multiply on the host body rather the infection rate reduced from 100% to between 44 and 78%, parasite burden was reduced from an average of 3 per fish to 2.25 while the healthy fish acquired the parasite and the average burden was 2.15. The mean values of the prevailing water quality parameters were within the optimum range acceptable in fish culture systems in the tropics.
    Description: includes:- 1 table.;9 refs.
    Keywords: Aquaculture ; Ecology ; Nigeria ; Ibadan ; freshwater environment ; Parasites ; Parasitic diseases ; Infectious diseases ; Fish diseases
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    Format: 296 - 298
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    The role of information in harnessing fisheries and eco-tourism for national development (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23001 | 19325 | 2018-03-05 09:29:09 | 23001 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The importance of information in every sector cannot be over-emphasized. The ability to identify and utilize our natural endowment depends on the availability of information resources within or at the right time. The low level of information provision in Nigeria is attributed to infrastructure as a result of inadequate funding of the sector. Research has shown that information has revolutionized the society, moving the world from the industrial age to the information age and completely changing the way the economy functions. Success goes with the best information. However, for now, if there must be increase in fish production and eco-tourism participation, employment opportunities, poverty reduction, food security and nature appreciation in terms of environment and living creatures, our fisheries scientists and policy makers will have to rely on sources of information using the advantage of libraries, and Information Communication Technology (lCT). This development in information resources affects many areas of Nigerian economy including the fisheries and eco-tourism sectors. The contribution of information resource in the development of the fisheries sub-sector can be viewed under those of fisheries information products like the Nigerian Fisheries and Aquatic Sciences. (NIFFIC) database, Proceedings of national conferences of Fisheries Society of Nigeria (FISON), annual and technical reports Fisheries Research Institutes in Nigeria. Also to be brought under perspective is the information products of eco-tourist institutions like the Nigerian National Parks.
    Description: Includes:- 1 table.;1 fig.
    Keywords: Fisheries ; Information Management ; Nigeria ; brackishwater environment ; freshwater environment ; marine environment ; Information services
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    Profitability of an economic diet in practical fish farming: a case study of vitamin C inclusion in the diet of Heterobranchus longifilis fingerlings (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23036 | 19325 | 2018-03-05 09:16:43 | 23036 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A completely randomised design with three replicates was used for an experiment conducted to study the profitability of vitamin C inclusion into the ration formulation for Heterobranchus longifilis. Six different levels 0, 50, 100, 150, 200 or 250 mg of L-ascorbic acid (vitamin C) kg-1 diet was included in a 42.5% crude protein basal diet and fed to triplicate groups of twenty fingerlings. The groups fed diets with vitamin C had statistically significant (P〈0.05) higher final weight than the group fed the control diet without vitamin C at the end of twenty weeks study, Feed consumed was significantly (P〈0.05) lower in the group fed diet without vitamin C. There was a significant (P〈0.05) difference between the groups fed 0 and 50 mg vitamin C kg-1 diets, but no significant (P〉0.05) difference between the groups fed diets with 100, 150, 200 and 250 mg vitamin C kg-1 diet on this parameter. Mortality was significantly (P〈0.05) higher in the groups fed diet without vitamin C while there was no significant difference (P〉0.05) between the fish fed the diets with respective graded levels of vitamin C. The thiobarbituric acid reactive substance (TBARS) of the liver and whole body of fish was significantly (P〈0.05) higher in fish fed diet devoid of vitamin C. Cost per kilogram of fish base on feed input was significantly (P〈0.05) higher in the group fed diet without vitamin C than those enriched with vitamin C. However, within groups fed with vitamin C cost per kg of fish was significantly (P〈0.05) decreasing in the following order: diet 2〉 diet 6〉 diets 4, 5, and 3. There was no significant difference (P〉0.05) between fish fed diets 3, 4 and 5 with respect to cost per kilogram of fish. This study vividly showed that there is no alternative to the use of a complete diet with vitamin C in an intensive practical farming of H. longifilis geared towards optimum profit maximisation in terms of feed as one of the variable input.
    Description: Includes:-2 tables.;20 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Diets ; Feeding experiments ; Vitamin C
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    Growth performance of Clarias gariepinus fingerlings fed cooked breadfruit (Artocarpus altilis) seed meal as replacement for maize in outdoor hapas (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23040 | 19325 | 2018-03-05 20:36:36 | 23040 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The growth performance and nutrient utilization in Clarias gariepinus fingerlings fed cooked breadfruit (Artocarpus altilis) seed meal based diet as a replacement for maize, investigated for 8 weeks. Five (5) diets of breadfruit seed meal substituted for maize at different levels of inclusion (0%; 25%; 50%; 75% and 100%) were fed to the fingerlings at 5% body weight twice daily in hapa of 1m x 1m x 1m. The hapas wee submerged in a pond and each hapa stocked with 20 fingerlings of mean weight of 5.8~c0.00g. Evaluation of growth parameters nutrient utilization of the experimental diets showed that there was no significant difference (P〉0.05) in mean final weight (MFW); specific growth rate (SGR); feed conversion rate (FCR) protein efficiency ratio (PER) and apparent net protein utilization (ANPU) among the treatments. The results suggested a net advantage of replacing dietary maize with cooked breadfruit seed meal for Clarias gariepinus fingerlings at 50% and above levels of inclusion under the condition of the experiment.
    Description: Includes:- 4 tables.;10 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Makurdi ; freshwater environment ; Fish culture ; Feeding experiments ; Growth rate ; Diets
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    Evaluation of different soybean-based diets on growth and nutrient utilization of Heterobranchus longifilis in aquaria tanks (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23034 | 19325 | 2018-03-05 09:13:55 | 23034 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: In order to compare the effect of raw, cooked, toasted and extruded soybean meals on the growth and nutrient utilization of Heterobranchus longifilis fingerlings, 120 pure Heterobranchus longifilis fingerlings were purchased at the National Institute for Freshwater Fisheries Research (NIFFR) improved genetic fish hatchery and randomly allocated into four different treatments with two replicates each with 15 fingerlings in 8 aquaria tanks. Four different diets containing 40% crude protein each were compounded and fed to the fish at 5% body weight for 56 days. At the end of the feeding trials, growth performance and nutrient utilization were evaluated. The results revealed that fish fed toasted soybean-based diets had highest mean weight gain (MWG) of 16.39g, specific growth rate (SGR) of 2.03%/day, and food conversion ratio (FCR) of 2.18. The fingerlings fed the extruded soybean-based diet gave the least growth performance. It could be concluded in practice, that toasted soybean-based diet is optimal for growth of Heterobranchus longifilis fingerlings.
    Description: Includes:- 5 tables.;3 fig.;7 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Diets ; Nutritive value ; Feeding experiments
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    Analysis of physicochemical characteristics of some freshwater bodies in Essien Udim Local Government Area of Akwa Ibom State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23044 | 19325 | 2018-03-05 20:45:24 | 23044 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The physical and chemical characteristics of freshwater bodies Ikot Ebak and Abeneyentem streams in Essien Udim Local Government Area, Akwa Ibom State, Nigeria were studied from (July December 1996). The mean values obtained in the two water bodies were pH (6.8~c0.12, 6.8~c0.09, respectively). Conductivity (4.9~c2.26, 5.0~c2.09 iScm-1), total dissolved solid (16~c7.58, 37~c26.9 mg/l), TSS (46~c26.0, 53~c53.1)g/l), alkalinity (17.5~c7.27, 10.7~c8S MgCaCo3/1), DO (6.98~C1.46, 8.3~C29.0mg/1), BOD (2.65~c2.44, 3.15~c2.79mg/1), Salinity (0.41~c0.12, 0.31~c0.04%o') total hardness (0.64~c0.21, 0.84~c0.42mg/l, N03-N (0.31~cO.26, 0.35~c0.29mg/l), and PD4-P (0.022~c0.0199 0.023~c.022mg/1), respectively. There were significant difference in the means of the parameters in the two water bodies except TDS, Alkalinity and Hardness. The water bodies were found to be slightly acidic with low conductivity. The properties in the water bodies were in conformity with international standards for both drinking and aquatic life.
    Description: includes:- 2 tables.;6 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Ikot Ebak ; Nigeria ; Abeneyentem ; freshwater environment ; Physicochemical properties ; Alkalinity ; Salinity ; Dissolved oxygen
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    Evaluation of pawpaw leaf-based diets (Carica papaya) on growth and survival of African catfish (Clarias gariepinus) fingerlings reared in plastic bowls (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23049 | 19325 | 2018-03-06 15:26:25 | 23049 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: 200 fingerlings of African catfish (Clarias gariepinus) of average weight of 22.8~c0.04g were used to investigate the nutritive value of Pawpaw (Carica papaya) leaf-based diets. Five (5) isocaloric and iso-nitrogenous diets containing fishmeal protein at a rate of 0%, 25%, 50%, 75%, and 100% along with the pawpaw leaf were formulated. The diet without the pawpaw leaf meal serves as the control. The fish fingerlings were fed at 5% body weight per day for 56 days in plastic bowls. It was observed at the end of the experiment that pawpaw leaf meal was suitable as a protein supplement when incorporated at 50% replacement. The body weight gain, specific growth rate (SGR) and food conversion ratio (FCR) values of 18.68g, 1.07%/ day and 4.72 respectively were highest in diet with 50% replacement closely followed by diet with 25% replacement. Based on the results, it could be recommended that in practice 50% replacement of pawpaw leaf meal with fish meal is optimal in practical diet of African catfish (Clarias gariepinus) fingerlings. Nevertheless, complete replacement of pawpaw leaf meal decreases growth rate and should not be used in Clarias gariepinus fingerlings.
    Description: Includes: - 3 tables.;5 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Carica papaya ; Nigeria ; freshwater environment ; Fish culture ; Feeding experiments ; Diets
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    Assessment of capital assets and utilization amongst artisanal fishers in Tatabu fishing community (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23054 | 19325 | 2018-03-06 15:33:34 | 23054 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Sustainable development in Tatabu fishing community can hardly be attained without a systematic socio-economic consideration of the productive activities and development needs of the people. Generally two important factors play a great role in rural livelihoods; the prevailing structures and processes and access to assets, which can be combined in a various ways to generate positive outcomes. In essence poverty and the opportunity to escape from it depends on all the above. The assets comprise of human, natural, social, physical and financial. The present study (emperically analyzed their strength, linkages and the effects of policy and structures on them, particularly as it translates to the socio-economic well-being of the fishers.
    Description: Includes:- 3 tables.;9 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Tatabu L. ; Livelihood ; freshwater environment ; Artisanal fishing ; Investments ; Financial resources ; Fishery economics ; Labour
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    Effects of insects infestation on the shelf-life of smoked dried fish: a review (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23057 | 19325 | 2018-03-05 20:48:39 | 23057 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Most of the fish produced in Nigerian fresh-water systems are marketed as dried fish, since there are few alternative methods of preservation for distant markets. Considerable quantities are lost through insect infestation, fragmentation during sorting, mixing, storage and transportation. In Nigeria, a high proportion of the dried fish sold in the market harbours beetle infestation, mainly Dermestes maculatus and Necrobia rufipes. D. maculatus is the dominant pest, accounting for 50.0%. The larvae of both beetles are the most numerous forms and are responsible for a large proportion of the damage of dried fish.
    Description: includes:- 7 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Aquatic insects ; Infestation ; Cured products ; Dried products ; Storage life
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    Consumers' preference of fish products in Yenagoa metropolis, Bayelsa State (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23055 | 19325 | 2018-03-06 15:35:00 | 23055 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The study was conducted to assess consumer's preference of fish products in Yenagoa Metropolis, Bayelsa State. One hundred and ninety consumers were randomly selected for the study. Results showed that fishery products in Yenagoa metropolis include fresh, smoked, fried, dried, canned and frozen fish. Sixty-eight percent of the respondents said that the products are enough, whereas seventy-six percent feel the variety of fishery products is low. Majority of the respondents (86%) preferred fresh fish followed by smoked fish which was preferred by sixty-four percent of the respondents. Age, ethnic grouping, gender, marital status and education did not have any significant influence on the preferences of the consumers (P〉O.05). Major problems identified by the consumers were exorbitant prices of fish because of the activities of middlemen, unhygienic selling environment and scarcity of fish products. Consequently, it is recommended that an adequate system of financing small scale fisheries be evolved to reduce the influence of middlemen; sanitary laws should be enacted and enforced in the fish markets around the metropolis; Establishment of modern fish markets in Yenagoa to boast fish production, aquacultural investors should be attracted.
    Description: Includes:- 3 figs.;9 refs.
    Keywords: Fisheries ; Nigeria ; Yenagoa ; freshwater environment ; Fish utilization ; Fishery products ; Consumers
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    Comparison of the quality of smoked Tilapia using mud kiln and modified drum kiln (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23060 | 19325 | 2018-03-06 15:40:12 | 23060 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Fresh tilapia (Oreochromis niloticus) was smoked using two different kilns to evaluate and compare the microbial changes or quality, physicochemical and organoleptic characteristics. Smoked samples were dominated by Gram-positive bacterial, flora, Bacillus, Streptococcus and Staphylococcus. Fungi isolated included Aspergillus spp, and Penicillium spp. The two kilns used in smoking are Modified Drum Kiln (MDK) and Mud kiln (MK). The MDK had a higher impact on the total viable count (TVC) and reduced the TVC of the fresh sample by 37.5% while the MK reduced it by 29.5%. In a similar trend the MDK reduced the number of Staphylococci and fungi by 43.3% and 33.8% respectively while the MK only reduces them by 30.9% and 26.3% respectively. Statistical test indicated significant difference (P〈0.05) in the microbial load of fish processed in the two kilns. However, the reduction of the Coliform by the two smoking kilns is not significantly different.
    Description: Includes:- 3 tables.;10 refs.
    Keywords: Fisheries ; Nigeria ; Smoked fish ; Smoking Kiln ; Tilapia ; freshwater environment ; Cured products ; Processed fishery products ; Quality ; Microbiological analysis
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    Effect of cold and hot smoking of Clarias gariepinus on consumer preference (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23062 | 19325 | 2018-03-10 14:32:20 | 23062 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: The objective of this study was to determine the best smoking method that will enhance consumer preference for Clarias gariepinus without affecting negatively the nutritive value. Two methods of smoking were used: cold and hot smoking. The fish were smoked with improvised drum smoking kiln and oven. Smoked fish samples obtained were subjected to chemical analyses and sensory evaluation. Chemical analyses showed that the smoked fish were still rich in protein (66.0067.52%) and fat (9.83-12.28%); while the moisture content ranged between 7.82-8.24% and ash, 12.86-14.16%. There was no significant difference (P〉0.05) in the protein, ash and moisture contents. Significant differences (P〈0.05) were observed in the Calcium(Ca), Potassium(K), Sodium(Na), Zinc(Zn), Lead(Pb), Iron(Fe) and Phosphorus(P) contents. Only hot smoke-dried (HSD) fish samples showed no presence of lead. The levels of sodium(Na) and potassium(K) in the smoked fish were relatively high, though, the amount of potassium(k) was higher. Sensory evaluation results revealed that there were no significant differences (P〉0.05) in the colour and taste ratings of the smoked fish samples. However, significant differences (P〈0.05) were observed in the odour, texture and overall acceptability. Hot smoke-dried and cold oven-dried Clarias gariepinus had the best overall acceptability in ratings.
    Description: Includes:- 1 table.;2 figs.;12 refs.
    Keywords: Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Fishery products ; Processing fishery products ; Cured products ; Curing ; Mineral composition
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    Women in frozen fish marketing in Lagos State: strategies and methods (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23067 | 19325 | 2018-03-10 14:36:09 | 23067 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Lagos state has a major sea port for landing of frozen fish from Mauritania, Senegal, the Scottish waters and other European countries. In the last three years, the dense population of the state has encouraged all kinds of trade to thrive. Fish as a major food in many Nigerian diets has been known to complement the high carbohydrate intake of majority of the Nigerian populace because of the unaffordable prices of beef in the market. The market for frozen fish is rich in Lagos. It has provided many women fishmongers a livelihood for over a decade. They have been able to sustain their families and improve their social status over the years. This study reports the modus operandi of the trade. The study covered a period of three months. Fish sales were monitored in Epe, Oyingbo, Ijora and Alaba markets. The cooperation of the heads of markets (Iya Olojas) were requested at every market. It was ensured that observations and the interviews/questionnaires do not interfere with the women's activities. Specific areas focused upon in the study included countries of fish imports, most acceptable species, packaging, purchase price, sales price and profit margins. Other important factors in the fish market that were studied included entrance into the fish marketing business, sources of finance and problems. The study also made suggestions on how to improve upon the fish marketing business of women in Lagos State.
    Description: Includes:- 1 table.;3 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Lagos State ; Frozen Fish ; freshwater environment ; marine environment ; Women ; Frozen products ; Processed fishery products ; Marketing ; Chilling storage
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    Effect of stocking density on the growth rates of Clarias gariepinus in a floating hapa system (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23037 | 19325 | 2018-03-05 09:18:00 | 23037 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: An experimental growth trial in floating net-hapas at three stocking densities in concrete pond was carried out. 4.68 5.25g mean individual weight fish were stocked at 25, 50 and 100 per m3. A 40% protein balanced diet was used as feed. The results of the study showed no statistical significant difference in growth among the three treatments. Food conversion ratios ranged in 1.60 to 1.82, and specific growth rates were between 3.80 and 4.16%/day. The result suggests that culture of C. gariepinus at a density of 50/m3 and production of 4.15kg/m3 in 84 days with production of 8.30kg/m3 in a growing season of 180 days is possible using the net-hapa systems enclosed in a concrete pond.
    Description: includes:- 2 tables.;8 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Alau L. ; freshwater environment ; Fish culture ; Stocking density ; Growth rate ; Floating cages
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    Quantification of vitamin C (ascorbic acid) requirements of Heterobranchus longifilis fingerlings (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23039 | 19325 | 2018-03-05 20:35:11 | 23039 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: A feeding experiment was conducted to quantify the minimum dietary vitamin C requirement of Heterobranchus longifilis fingerlings and the minimal dietary inclusion levels that will meet these requirements after degradation from feed processing and storage. Fish were fed a basal diet with 42.5% crude protein for a conditioning period of 2 weeks. Following conditioning, fingerlings with initial mean weight, 2.3~c0.3 g were stocked as groups of 20 fingerlings into 30 litre tanks in a mini flowthrough experimental system and fed the basal diet and experimental diets supplemented with 0, 50, 100, 150, 200, or 250 mg of L-ascorbic acid kg-1 diet obtained from TUYIL PHARM. INDUSTRIES, lIorin, included into the basal diet by replacing part of the silica component and fed to triplicate groups for 20 weeks. Fish fed the control (0 mg vitamin C kg-1) diet exhibited deficiency signs including lordosis, caudal fin deformity, skin erosion and significantly suppressed weight gain and higher condition factor. Protein efficiency ratio and specific growth rate were significantly improved with increasing levels of vitamin C up to 200mg kg-1 diet. Tissue (liver, kidney, gills and muscle) ascorbate concentration generally reflected dietary inclusion levels with the signiticant lowest level occurring in the control groups. Vitamin C analysis after feed processing revealed 18 - 21% loss. The least mean squares error regression analysis of weight gain data on inclusion level of vitamin C revealed that the minimum dietary requirement of H. longifilis is 82.2~c0.2 mg vitamin C kg-1 diet which corresponds to 100 mg of vitamin C kg-1 diet based on data from this study.
    Description: Includes:- 4 tables.;1 fig.;6 plates.;32 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Fish culture ; Feeding experiments ; Vitamin C ; Growth rate
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    Investments and employment opportunities in the aquaculture sector in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23042 | 19325 | 2018-03-05 20:39:37 | 23042 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Nigeria is a large fish consuming nation with a total consumption at more than 1.2 million tonnes, with fish imports making up about two thirds (700,000 t) of the fish supply. Although the contribution of fisheries to the Gross Domestic Product is only 3-4%, it occupies a very significant position in the primary sector providing employment for over a million people (FDF Statistics) and contributing about 50% of the animal protein intake of the population, particularly the resource poor. The estimated national demand for fish is estimated as high as 1.3 million metric tons with a wholesale value of more than $US 1 billion. Of this, the Federal Department of fisheries (FDF) estimated 511,000 tones are provided domestically or only about one third of demand, with an estimated per capita fish consumption ranging from 7.5-12 kg. With the current policy thrust towards fisheries development, there is excitement among stakeholders in private sector fish farming as shown by the expansion and renovation of existing farms and investments in few fish farms and hatcheries. This has brought the industry to a retail production value of N180 million. This development is not however without some challenges. Fish producers have rushed ahead with the production without support of a developed values chain. This gap is providing an entry point for interventions to greatly facilitate expansion of services in the value chain for this exciting industry. This paper therefore seeks to provide guidance on how to strategically focus aquaculture activities to capitalise on opportunities for increased employment and incomes.
    Description: Includes:- 1 table.;2 figs.;6 refs.
    Keywords: Aquaculture ; Nigeria ; Employment opportunities ; freshwater environment ; Investments ; Personnel ; Human resources ; Fish culture
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    Composition and abundance of macro-invertebrate community in earthen ponds of Akscoa Fish Farm Oruk Anam L.G.A., Akwa Ibom State, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23045 | 19325 | 2018-03-06 15:23:21 | 23045 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Composition and abundance of macro-invertebrates, in Akwa Ibom State College of Agriculture, Fish Farm in UrukAnam Local Government Area, Nigeria, was studied from (December 2005 to May, 2006). Collections of samples were made with benthic net at weekly intervals. Stocked and unstocked ponds were selected for the study. The stocked ponds had 122 individuals macro invertebrates while unstocked pond had 160 number of individuals. The two ponds were dominated by Diptera followed by Coleoptera with single individual species. Groups which are regarded as clean water fauna were absent in both ponds. Generally, the ponds were poor in terms of number of taxa and individuals.
    Description: Includes:- 2 tables.;8 refs.
    Keywords: Aquaculture ; Ecology ; Nigeria ; Akscoa Fish Farm ; Macroinvertebrate ; freshwater environment ; Abundance ; Composition ; Microorganisms ; Microbiology ; Freshwater ecology
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    The length weight relationship and condition factor of the Banded Jewel fish (Hemichromis fasciatus Peters) from Kainji Lake, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23214 | 19325 | 2018-03-25 12:46:05 | 23214 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The length weight relationship and condition factor of Hemichromis fasciatus from Kainji Lake was studied. One hundred and twenty seven fish samples of total length ranging from 6.50cm 15.50cm and weigh between 4.00g and 60.00g collected between August 2006 and June 2007 were analyzed. Results showed that a, b and r - values were 0.0042, 3.442 and 0.966 respectively, while the condition factor (CF) values varied from 0.67 2.42 with mean of 1.203. The fish exhibited positive allometric growth pattern. The condition of the lake is favourable for the survival of the fish species.
    Description: Includes:- 2 tables.;1 fig.;15 refs.
    Keywords: Ecology ; Fisheries ; Hemichromis fasciatus ; Nigeria ; kainji L. ; freshwater environment ; Length-weight relationships ; Condition factor
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    Diseases associated with livestock integrated fish farming in Nigeria: a review (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23215 | 19325 | 2018-03-17 12:47:49 | 23215 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Just like other animals and humans, fishes are prone to diseases and predation. Diseases can be caused by one and/or combination of any of the following agents e.g. bacteria, fungi, viruses and parasites. Diseases have become a primary constraint to aquacultural development, which may affect the achievement of a desired impact for rapid development of fish culture in Nigeria. Apart from causing mortalities, they also cause loss of production quality, reduced growth, reduced fecundity, loss due to control measures and loss due to social factors associated with the farmer. This review has discussed the diseases that are associated with integrated fish farming including livestock cum fish farming, poultry-cum fish farming, Waste water fish farming, rice-cum fish farming e.t.c. The control of diseases associated with integrated fish farming requires a multi-disciplinary approach including chemotherapy, sanitation, routine hygiene, quarantine, genetic selection and immunoprophylaxis. The treatment and prevention of fish diseases follow the same principles used in chemotherapy of higher animals.
    Description: Includes:- 4 tables.;9 refs.
    Keywords: Agriculture ; Aquaculture ; Nigeria ; freshwater environment ; Fish culture ; Diseases ; Bacteria
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    Capacity building and training requirement for effective fisheries and aquaculture extension in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23216 | 19325 | 2018-03-17 12:51:36 | 23216 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper examines the importance of capacity building and training requirement for the benefit of fisheries and aquaculture extension in Nigeria. It involves the analysis of secondary data bothering on the management of agricultural extension in Nigeria over time vis-avis various agricultural development programmes in the past in which fisheries and aquaculture extension was apparently de-emphasized in favour of crop and livestock agriculture. It is therefore recommended as a way forward that a favorable reform in the Nigerian agricultural extension system will be a necessary avenue to put fisheries and aquaculture extension in proper perspective for effective service delivery which will be a good entry point to achieving the millennium development goals of combating hunger, extreme poverty and attainment of food security in Nigeria.
    Description: Includes:-7 refs.
    Keywords: Aquaculture ; Fisheries ; Information Management ; Nigeria ; Extension services ; freshwater environment ; Technology transfer ; Training ; Education ; Sociological aspects
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    Women in fisheries: a case study of the Kainji Lake Basin, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23222 | 19325 | 2018-03-18 13:52:04 | 23222 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The study examined the contribution of women to fisheries in Kainji Lake Basin, Nigeria. The sample size of 80 respondents was selected through a purposive sampling in ten (10) fishing villages around Kainji Lake Basin. Instrument for data collection was semi- structured questionnaire. Data was analyzed using descriptive statistic. The result showed that the women are mostly engaged in processing, marketing and financing. About 60 percent of the women interviewed are engaged in marketing and financing. Ten (10) percent of the respondents are engaged in financing. The low participation in financing is attributed to high amount of capital involved. It is recommended that women should be made to benefit more from rural development policies and programmes.
    Description: Includes:- 2 tables.;1 fig.;7 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Kainji L. ; freshwater environment ; Women ; Fisheries
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    Proximate composition and amino acids profile of smoked catfish Clarias gariepinus and tilapia Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23226 | 19325 | 2018-03-18 14:51:17 | 23226 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The proximate composition and amino acids assay of smoked Clarias gariepinus and Oreochromis niloticus were determined using standard procedures. The mean proximate composition of Oreochromis niloticus are 8.9% moisture, 16.00% lipids, 5.6% ash, 44.5% crude protein, 0.42% crude fiber and 24.9% NFE while Clarias gariepinus has 8.19% moisture, 15.55% lipids, 4.725 ash, 40.46% crude protein, 0.50% crude fiber and 30.58% NFE. There is therefore a nutrient variation between the 2 species of fish Oreochromis niloticus has higher crude protein, lipids, moisture and ash content than Clarias gariepinus.The amino acids profile shows that both fishes have 17 amino acids. Apart from Tryptophan, the following essential amino acids Histidine, Methionine, Threonine, Isoleucine, Leucine, Lysine, Valine and Phenylalanine are present in both fish. Oreochromis niloticus however has higher quantities of the essential amino acids except for Histidine than Clarias gariepinus
    Description: Includes:- 2 tables.;2 figs.;7 refs.
    Keywords: Chemistry ; Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Amino acids ; Ash content ; Lipids ; Organic compounds ; Moisture ; Proteins
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    A comparative analysis of the food and feeding habits of African lungfish (Protopterus annectens, Owen) in River Rima and Goronyo Dam North Western Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23232 | 19325 | 2018-03-18 13:49:50 | 23232 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The food and feeding habits of Protopterus annectens of the River Rima and Goronyo Dam in North Western Nigeria was studied. A total of one hundred and eighteen (118) fish samples were collected from October, 2001 to September, 2002 and the stomach contents were analyzed using frequency of occurrence method. The feeding adaptation with respect to mouth and related structures, gill rakers and dentition were examined. The gut length and fish length indicated rectilinear positive relationship. The regression coefficient (b) and correlation coefficient (r) of GL TL relationships were highly significant (p〈0. 01). The main taxa of food substances found in the stomachs included substances of plant and animal origins, with overall frequency of 49. 1and 38.3% for the samples from River Rima and 27.2 and 60.3% for those from Goronyo Dam in the same order. The results of percentage occurrence of the food items in the dry season showed that animal substances in the juveniles (51.7%) and the adults (41.4%) were higher than the plant materials in the samples from the two water bodies. In the rainy season, the percentage occurrences of animal substances were higher in the adults (= 30cm) samples from Goronyo Dam than those samples from River Rima, while the same food items were absent in the juveniles (= 30cm) from the two water bodies. These feeding adaptive features indicate the roles of the species in their ecological niche and provide base line information that could be useful in satisfying their food requirement under culture condition. The diversity of food substances found in the stomach and their occurrence in the juveniles and adults varied with the water bodies and season.
    Description: Includes:- 5 tables.;19 refs.
    Keywords: Ecology ; Fisheries ; Protopterus annectens ; Nigeria ; Rima R. ; Nigeria ; Goronyo Dam ; freshwater environment ; Feeding behaviour ; Feeding ; Food chains ; Food preferences
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    An appraisal of the traditional fish handling and processing methods in Lake Chad (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23218 | 19325 | 2018-03-18 13:40:29 | 23218 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The paper reviews the various techniques of fish handling and processing in Lake Chad. Poor handling of fish catches on board coupled with the distant location of the fishing grounds and thick aquatic vegetation on the lake which hamper fast movement of catches to the processing centers are the bane of good quality fresh fish getting to the processors. The techniques adopted in processing and preservation are mainly smoking, char-burning and sun drying. Defects suffered by the processed products of the methods include high moisture content, heavy insect infestation, bacterial decomposition and fungal attack. Protection of catches from direct sunlight by spreading wet jutes over them will lower the rate of deterioration. Removal of the aquatic vegetation by appropriate authorities and canalization will ease movement of fish catches to the processing centers. More serious enlightenment of the processors on the adoption of the 'Chorkor' oven will reduce the problems presently facing cured fish. The use of rambo insecticide and other dangerous chemicals by the fish processors and marketers for the preservation of fish products before repackaging should be discouraged.
    Description: Includes:- 1 table.;43 refs.
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Fish handling ; Handling ; Processing fishery products ; Curing
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    Design of double chine flat bottom fishing canoe for lake fishery (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23217 | 19325 | 2018-03-18 13:38:58 | 23217 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: A 7.0 meters Length Overall (LOA) flat bottom canoe similar to the one commonly used for fishing in Kainji lake, but with some modifications, was designed. The improvements/modifications over the local canoe include, an additional chine to reduce the flatness of the bottom which was absent in the local canoes commonly used. The canoe's light displacement (weight empty) was 0.48 Tonne, which was similar to local canoe of same size. The draft obtained was 0.13 M( 13cm), which is 36.9% of its depth (0.48 M). The capacity of the canoe was 1.304 tones. The water plane area (WPA) was 3.89 M2; WPA coefficient, and block coefficient were 0.83, and 0.82 respectively. The modification on the canoe resulted in provision of a canoe with the bottom shaped close to V-bottom to aid better performance on rough turbulent water such as the Kainji Lake, and increased life span of canoe and safety of fisher folk while aboard fishing.
    Description: Includes:- 1 table.;7 figs.;7 appendix
    Keywords: Fisheries ; Nigeria ; freshwater environment ; Boats ; Design ; Fishing vessels
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    Strengthening fisheries extension under the Unified Agricultural Extension System (UAES) policy towards sustainable fisheries development in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23221 | 19325 | 2018-03-18 13:47:06 | 23221 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The paper examines the prospect and constraints of fisheries extension under the unification policy. It revealed certain barriers influencing its fullest utilization as well as fisher folks participation in extension programmes. Some of the barriers identified are related to inaccessibility, logistic support, improper aquaculture methodology, insufficient applied research in small scale fisheries, inability to convert research findings into positive results by small scale fisheries, inadequate number of fisheries research personnel within the existing research centers and institutes catering for the fishers sector, complexity of issues, lack of coordination and continuity in research and data deficiencies in small scale fisheries. Based on the findings, the paper recommends that, the effectiveness of the methods of identifying research needs by practitioners be assessed, the impact of the generated research results in reducing or solving field problems be ascertained, the constraints to diffusion of proven technologies from research being integrated into small scale fisheries be evaluated, the degree of effectiveness of extension delivery tools on .fishers technology adoption be ascertained, and lastly, adequate applied research in small scale fishery be emphasized.
    Description: Includes:-8 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; Extension services ; freshwater environment ; Technology transfer ; Education
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    Comparison of microbial load and proximate analysis of fresh lean fish Labeo coubie and fresh fatty fish Synodontis membranaceus with their smoked products (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23224 | 19325 | 2018-03-18 13:56:36 | 23224 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Comparative study on the microbial load and proximate composition of fresh lean fish Labeo cubie and fresh fatty fish Synodontis membranaceus with their smoked products were carried out. The colony count of different parts was carried out on all the samples and the results show the highest microbial load on the gut of both the fresh lean fish and the fresh fatty fish. The smoked dried lean fish and the smoked dry fatty fish had lower microbial counts compared to their fresh samples because smoking reduces the microbial load on fish. Biochemical characterization carried out on all isolates confirmed Gram-negative bacterial isolates. The proximate composition show that water is the most affected nutrient during the hot smoking of both the fresh fish sample and the fresh fatty sample with a corresponding increase in protein content. There was a significant difference (p〈 0.05) in proximate composition of smoked product of fresh fatty fish and the fresh lean fish. The colony counts of different parts of the fish reveals that majority of the microorganisms is found in the guts followed by gills and the lowest in the skin this is the pattern in the two fresh fish but for smoked fish the gut is usually removed before smoking.
    Description: Includes:- 4tables;9 refs.
    Keywords: Fisheries ; Labeo coubie ; Synodontis membranaceus ; Nigeria ; freshwater environment ; Microbial contamination ; Microbiological analysis ; Fishery products
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    Problems and prospects of fish culture in Mubi, Adamawa State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23225 | 19325 | 2018-03-18 14:49:23 | 23225 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper reviewed the major problems of fish pond culture in Mubi.The prospects for fish pond are highlighted and a call to awaken people initiatives in Mubi region to invest in fish farming is made so that the nutritional and economic status of the people of the region might be improved through aquaculture. Some of the problems identified are: lack of knowledge of the biology of culturable species, none availability of fish feed, none availability of fish seed and the peculiarity of the weather most expecially the very cold season when the temperature can be as low as 18~'C.
    Description: Includes:- 12 refs.
    Keywords: Aquaculture ; Nigeria ; Mubi ; freshwater environment ; Fish culture ; Freshwater aquaculture
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    Determination of intestine length to standard length ratio of some fishes from Ikpoba River and Ovia River, Nigeria with a review of culture of Parachanna obscura (Pisces:Channidae) (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23229 | 19325 | 2018-03-18 14:58:27 | 23229 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The gut length to standard length ratios of twelve fish species from the Ovia and Ikpoba Rivers were calculated to work out their feeding level in the food chain. The mean ratio of five species Brycinus macrolepidotus Smith, 0.9 Parachanna obscura (Gunther), 1.0, Papyrocranus afer. Gunthel; 0.35, and Xenomystus nigri Gunther 0.75, classify them as carnivores. Four species Synodontis eupterus Boulenger; 4.4 S.schall (Bloch and Schneider) 4.8, Tilapia mariae Boulenger, 3.5, and T. tilli (Gervais), 4.7, are herbivores. Three intermediate ratio species B. longipinnis (Gunther), 1.3,Chrysichthys furcatus (Gunther) 1.6, and Clenopoma kingsleyae Gunther, 1.8, are omnivores. The body depth of seven of the species was measured and expressed as percentage of the standard length to ascertain the accommodative capacity of the fish for the gut. In addition a review of culture of snake head fish Parachanna obscura is presented.
    Description: Includes:- 3 tables.;18 refs.
    Keywords: Aquaculture ; Ecology ; Parachanna obscura ; Nigeria ; Ikpoba R. ; Nigeria ; Ovia R. ; freshwater environment ; Fishery biology ; Length ; Ratios
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    Case studies on HIV/AIDS in fisheries development: lessons for Nigerian fisheries (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23230 | 19325 | 2018-03-18 15:00:41 | 23230 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper reviews accounts of social and economic features of HIV/AIDS epidemics in the fisheries sector focussing on Africa with particular reference to Nigeria. Fishing communities are often among the highest-risk group, with high overall rates of HIV/ AIDS prevalence. It is more important to use the information made available from these efforts in more effective way of targeting the appropriate interventions and measures that can be designed and instituted. This information could also serve useful purposes and the efficient mobilization of needed resources from all possible sources in order to achieve the Millennium Development Goals in the Fisheries sector in Nigeria.
    Description: Includes:- 31 refs.
    Keywords: Conservation ; Health ; Nigeria ; HIV/AIDS ; freshwater environment ; Public health ; Human diseases
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    Analysis of containers used by fishermen at Lake Alau community in Konduga Local Government Area of Borno State, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23238 | 19325 | 2018-03-18 15:18:15 | 23238 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Good handling of fish from the point of harvest to consumption is very essential and the quality of fish can only be maintained if only suitable containers are used in its processing, transportation, distribution and marketing. This study analyzed the different containers used by fishermen at lake Alau community in Konduga Local Government Area of Bomo State. The study was carried out in two prominent leading sites of lake Alau community which are kachalari and Abbari with the aid of questionnaires interview conducted with 50 randomly selected respondents fishermen. Both primary and secondary data were collected. The collected data were analyzed using the market cost of the various fish containers. The result shows that fish containers such as Metal basin, sacks, flat sacks and Metal trays have strong strength while Baskets, jerry cans and calabash have moderate strength the polythene bags, stationery and news print are very weak. Also baskets have the highest percentage of usage 20% while flat sacks, polythene bags and stationery have the highest percentage of 4%, which are the lowest. It can be concluded that, the different containers are afforded to fishermen but most of the containers are often kept dirty, which lead to poor hygiene, rough handling and invariably post-harvest losses and shortage in food supply. It can be recommended that, sheds should be provided at the landing sites to protect fresh fish the direct heat of the sun and enlightment of fishermen and traders on the minimum standard o fthe quality and hygiene for fish and fishery products.
    Description: Includes:- 4 tables;6 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Alau L. ; freshwater environment ; Containers ; Fishery products
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    The genetic characteristics of cephalic abnormality and its aquaculture implication in Clarias gariepinus (Burchell 1822) (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23241 | 19325 | 2018-03-18 15:26:11 | 23241 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Cephalic abnormality in nine mating groups involving Clarias gariepinus with cephalic abnormality, non Cephalic and Maiduguri origin were investigated to determine the level and the genetic basis of the occurrences and its aquaculture implication. The highest mean percentage survival in a Cephalic crossed with non cephalic group was 68.6% whereas the last mean percentage survival was 25.7% in the group of Maiduguri cross with Maiduguri parent. Cephalic abnormality was observed in the crosses with both female and male cephalic with a total frequency ranging from 0 % to 70.8. %. The least number of cephalic abnormality was 18.5% which involved a cross of non cephalic with cephalic, and the highest was 70.8%. This level of cephalic abnormality shows that the defect was hereditary. This result implies that, the genetic factor is a major contributor in the feature of cephalic abnormality in Clarias gariepinus.
    Description: Includes:-1 table.;3 appendixes.;11 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Diseases ; Deformation ; Fish culture ; Genetics ; Abnormalities ; Genetic abnormalities
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    Bacteriological quality of water and fish samples from Kainji Lake and the effect of animal and human activities (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23242 | 19325 | 2018-03-25 12:34:41 | 23242 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Kainji Lake is a man-made Lake and is impounded in 1968 to generate hydroelectric power. The Lake also offers opportunities for developmental projects like Fisheries and Irrigation. Lake Kainji receives organic waste through husbandry operations in which the cattle defecate into and around the bank of the Lake. Other sources of pollution include runoff from farms, bathing and washings in the Lake. Surrounding villages e.g. Tarda and Musawa used the Lake as source of raw drinking water and also for other domestic purposes. Bacteriological quality of fish and water from the Lake is carried out as well as that of cow dung by using primary isolation media and biochemical analysis. Physico-chemical parameters of water from the Lake is also determined. Total viable bacteria count and total coliform count of the water range from 3.4 x 104 to 03.8x 106 Cfu/ml and 1.4 x 103to 2.1 x 105Cfu/ml respectively. Cow dung has total coliform count of 6.9 x 105 while fish gills has total coliform count of 1.6x103cfu/g. Bacteria species such as Escherichia coli, Salmonella typhi, Aeromanas hydrophila, and shigella species were found in the water body. Escherichia coli, Aeromonas hydrophila, and Salmonella species were found in the fish samples. Escherichia coli, Aeromonas hydrophila, Shigella species and Salmonella species were isolated from cow dung. Physicochemical Parameters such as DO, BOD and N03-N range from 4. 7 to 5.2mg/l, 0.2 to 0.9mg/1 and 7.0 to 9.3 mg/l respectively. This result shows that Kainji Lake is an intermediately polluted water. It is therefore necessary that cow dung used for fertilization of fish ponds should be screened for pathogens before use. It is also recommended that pollution of surface water bodies through human activities should be discourage by legislation on water pollution.
    Description: Includes:- 6 tables.;14 refs.
    Keywords: Biology ; Fisheries ; Pollution ; Nigeria ; Kainji L. ; freshwater environment ; Bacteriology ; Water quality ; Environmental effects ; Pollution
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    Socio-economic factors influencing aquaculture development in Sokoto State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23243 | 19325 | 2018-03-25 12:36:45 | 23243 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The study was carried out in five local Government Areas namely Sokoto North, Bodinga, Kware, Ilila and Tambuwal mapped out by International Fund for Agricultural Development as fishery potential areas. Seven villages namely Gidan Igwai, Kaurar Kwasau, Gidan Akwara, Tozai, Tambuwal, Mogajin Gari, and Badau also were selected all at random. Fish farm management questionnaire was used for data collection. Results revealed that adequate fish farm facilities, fish seed supply, private sector confidence and support, risk consderation, government support and investment, over popularized livestock poultry sub sector and fishery extension service are the problems of fish farming. Recommendations were made as to how to improve fish farming in Sokoto State.
    Description: Includes:- 17 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Sokoto State ; freshwater environment ; Socioeconomic aspects ; Aquaculture ; Aquaculture development
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    Elemental concentration and size relationship in African cuttlefish Sepia bertheloti, from the coastal waters of Qua Iboe River, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23249 | 19325 | 2018-03-25 14:29:19 | 23249 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Ten specimens of African cuttlefish, Sepia bertheloti, from the coastal waters off Qua Iboe River, Southeast Nigeria, were analyzed for the relationship between the concentration of the elements and the size of the species. Energy Dispersive X-ray fluorescence technique was employed to determine the elemental composition of the species. Eleven elements were identified in the body of cuttlefish. These were Chlorine, Strontium, Potassium, Calcium, Bromine, Iron, Copper, Zinc, Manganese, Nickel and Selenium of these elements, the concentration of calcium, potassium. Copper and strontium had a positive correlation with the weight, while the concentrations of manganese, nickel, chlorine, iron were negatively correlated with their weights. However, only manganese had a significantly negative correlation (p〈0. 05). Bromine and zinc had no correlation with the weights of the species. There also existed a significant positive correlation between Ca and K, Se and Ni, Cu, Br and Zn and St and K. We conclude that African cuttlefish, irrespective of size is a rich source of nutritional elements and is especially recommended for pregnant women and for all age groups.
    Description: Includes:- 2 figs.;9 refs.
    Keywords: Fisheries ; Sepia bertheloti ; ASE ; Nigeria ; Gulf of Guinea ; Nigeria ; Qua Iboe R. ; freshwater environment ; marine environment ; Nutritional requirements ; Potassium ; Nutrition
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    Women participation in fisheries in some fishing communities in Sokoto, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23246 | 19325 | 2018-03-25 12:43:59 | 23246 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This study set out to investigate the participation of women in fisheries in some fishing communities in Wamakko Local Government Area of Sokoto state. It succeeded in establishing the fact that women are active though to some extent in fisheries in this area. This is as a result of the prevailing socio-cultural, as well as religious set up which revolves round task sharing. It however highlighted the fact that women's contribution in the fisheries sub-sector is necessary to improve their livelihood and by so doing, to directly help households.
    Description: Includes:- 8 refs.
    Keywords: Fisheries ; Sociology ; Nigeria ; Sokoto ; freshwater environment ; Women ; Fisheries ; Fishery resources
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    Acute toxicity and behavioural effects of chlorpyrifosethyl pesticide to juveniles of Clarias gariepinus Teugels (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23253 | 19325 | 2018-03-25 14:37:19 | 23253 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Chlorpyrifos-ethyl with its mode of action was evaluated in laboratory studies to determine its 96-h acute toxicity, using juveniles of Clarias gariepinus. The fish was exposed in glass aquaria to 0.64~cmg/l, 0.80mg/l, 0.96mg/l, 1.12mg/1 and 1. 28mg/1. The test substance was found to have lethal effects on fish as they changed fish behaviour and caused death. The 96-hLC50 value for C. gariepinus was estimated as 0.92mgl-1. Observations of be bavioural and mophlogical responses were used as indicators of sublethal toxicity. The behavioural toxicology bioassay may be valuable in comparing and predicting the mode of action of new or unknown toxicants in this and other fish species.
    Description: Includes:- 1 table.;1 fig.;2 plates.;38 refs
    Keywords: Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; freshwater environment ; Toxicity ; Toxicants ; Pollution ; Lethal effects
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    Indigenous knowledge system in fisheries: a review (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23260 | 19325 | 2018-03-25 14:50:35 | 23260 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Scientists and researchers agree that developmental projects should have impact on the targeted groups. In this context a review was made on the indigenous knowledge system in fishery with a view to elucidating the indispensability of the system due to the increasing acceptance globally. The importance of the system and the factors militating against it where shown. The relationship between fisheries science and the fisher's knowledge was also discussed. Some indigenous practices as well as equipment used by different people were cited. It was concluded that local knowledge of the environment and resources used, as well as the society within which the resultant goods and benefits are distributed is fundamental to the continuity of sound community based management practices. Recommendation was made for research to be conducted in every facet of fishery traditional system with a view to fusing the two; the indigenous and scientific to complement each another.
    Description: Includes:- 23 refs.
    Keywords: Fisheries ; Information Management ; Nigeria ; Information Sources ; Indigenous knowledge ; freshwater environment ; Fishery management ; Stock assessment
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    Study on the effect of two construction materials on the efficiency of fisheries aggregating devices (FADs) in Lake Kainji Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23259 | 19325 | 2018-03-25 14:49:05 | 23259 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish Aggregating Devices (FADs) were experimented in Lake Kainji using worn out automobile lyres and cement blocks for a period of 12 weeks. Six tyres and blocks were tied together separately in 3 replicates and randomly suspended in the lake at a depth of 2 metre and 50 meter interval. After 8 weeks of suspension, a fleet of gillnets with 76mm mesh size and hung at E-value 0.5 were zigzag set across the suspended FADs for 12 fishing periods with 13 hrs soak time (~c1.0268.D.) per period The trial showed that the cement block FADs attracted more fish (70% of the total fish caught) belonging to 6 different species. The lyres FADs attracted only 3 species of fish constituting some 30% of the total fish caught Citharinus citharus dominated the catch of the block FADs constituting 52.3% of the total catch, while Oreochromis niloticus was 46.4% of the tyre FADs. The Horizontal Enhanced Fishing Zone (EFZ) was found to be between 5 to 12 metres from the location of the FADs. There was significant different (P〈0.05) in the catches of the two FADs.
    Description: Includes:-14 refs,;1 table,;3 figs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fishing gear ; Gear construction ; Gear materials ; Gear research
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    Some soil nutrient composition favouring the growth of Typha grass in Kebbi and Katsina States, Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23276 | 19325 | 2018-03-28 15:48:40 | 23276 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This study was carried out by surveying all the water bodies of two states where Typha grass exists. Soil auger was used to take soil samples randomly from five different locations in both Kebbi and Katsina state at the depths of 0-5cm, 510cm, 10 15cm. Soil nutrient was analyzed for the mineral composition of the two States at different season and soil depths. The result showed that, soil depth between 5-10cm has the highest percentage of nitrogen, phosphorus, calcium and magnesium during dry season. The nutrient composition of soil from the two states followed the same pattern during wet season.
    Description: Includes:- 4 figs.;9 refs.
    Keywords: Earth Sciences ; Ecology ; Nigeria ; Kebbi State ; Nigeria ; Katsina State ; Soil nutrient ; freshwater environment ; Soils ; Nutrients (mineral) ; Growth ; Aquatic plants
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    Use of baobab pulp as a source of vitamin C in the diet of Nile tilapia, Oreochromis niloticus fingerlings (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23277 | 19325 | 2018-03-28 15:50:01 | 23277 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Sixteen (16) weeks feeding trial in a randomized design with three replicates was conducted to study the response of 180 Oreochromis niloticus fingerlings to baobab pulp as a source of vitamin C. They were fed a basal diet without supplemental vitamin C in the first 2 weeks of conditioning to deplete some stored acrobate. Diets supplemented with 1008 mgascorbyl-2-monophosphate Mg2+ (AMP) kg-1 diet (diet 1); 84g baobab pulp kg-1 (diet 2) and 168g baobab pulp kg"1 diet (diet 3) were evaluated. There was no significant difference (P〉0.05) in terms of weight gain, feed efficiency ratio, protein efficiency ratio, specific growth rate and survival between the groups fed diets 1 and 3. There was a significant difference between the groups fed diet 2 and either of the other diets. Total ascorbate concentration of the liver was significantly (P〈0.05) higher in the groups fed diet 3. The crude protein content of the final fish was significantly (P〈0. 05) higher in the groups fed diet supplemented with AMP. Interestingly none of the groups exhibited the characteristic symptoms of vitamin C deficiency. The results of this experiment suggest that Oreochromis niloticus was able to obtain vitamin C from the baobab pulp and tend to recommend baobab pulp at a level not less than 168g kg-1 diet in the nutrition of Oreochromis niloticus based on the condition of this study.
    Description: Includes:- 3 tables.;1 fig.;19 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Vitamin C ; Diets ; Feeding experiments
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    Effect of baits on the efficiency of Malian traps in Lake Kainji (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23278 | 19325 | 2018-03-28 15:52:01 | 23278 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Studies on the effects of two fishing baits on the catch composition of Malian Traps in Lake Kainji were monitored. The Traps were set at Monia fishing village in the southern basin of the Lake Baited with boiled yam (Dioscorea rotundata) and fresh palm fruit (Elaeis guineensis) and were inspected twice daily for seven weeks. The fishes caught comprised of nine (9) species belonging to four (4) families. The result of analysis of variance of the biomass as well as number and percentages of fishes caught in the traps by the baits showed there was no significant difference (P〉0.05). However, both baits showed better efficiency for Tilapia zilli, Oreochromis niloticus and Hemichromis fasciatus than other species caught but trap baited with fresh palm fruit had better efficiency for Distichodus restratus and Alestes nurse. There was wide range between the minimum and the maximum size of species caught, which showed the efficiency of the traps capturing small size, juveniles and the adult of large fish species due to small mesh size (1'') net cover of the trap. Recommendations were made for better performance and profitable fishing of Malian traps.
    Description: Includes:- 4 tables.;11 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; Malian trap ; freshwater environment ; Fishing ; Bait ; Trap fishing
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    Carbohydrate utilization of Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23279 | 19325 | 2018-03-28 15:53:18 | 23279 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Oreochromis niloticus of mean weight 45.96~c0.06g were fed seven practical diets ranging from 8.77 to 33.77% carbohydrate in 56 days. Mean weight gain were not significantly different (P〉0.05) while mean daily gain and specific growth rate varied significantly (P〈0.05). The protein efficiency ratio did not follow any trend with the percentage protein fed. It was highest with fish fed 46.3% and lowest with fish fed 51.2%. There was no significant variation in the food conversion ratio. The results indicated that O. niloticus utilized 25.28% carbohydrate optimally among the diets fed. The requirement of the fish for carbohydrate in diet is 30%.
    Description: Includes:- 3 tables.;2 figs.;19 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Feeding experiments ; Nutrition ; Carbohydrates
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    Optimum temperature and stocking density for transportation of tilapia (Oreochromis niloticus) broodstock in the semi-arid zone of Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23280 | 19325 | 2018-03-28 15:54:31 | 23280 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Oreochromis niloticus broodstock of mean weight 32.3g were cropped in the morning with dragnet from a 1 ha reservoir and transported in round tanks to the Hatchery complex of the National Institute for Freshwater Fisheries Research where they were stocked into 5m x 5m indoor concrete tanks filled with clean water and with aerators at a density of 4 fish/m1. They were acclimated for 5 days and then packaged into 60 liter capacity water proof bags at the following stocking densities: 60, 80, 100, 120, 140 fish/60 lit bag. Each stocking density had bags with ice blocks and bags without ice blocks in triplicate. The water proof bags were oxygenated, loaded into quick fitting plastic bowls and transported in a bus from New Bussa to Warra, Kebbi state, a journey of 3 hours. The trip was repeated four times. Percentage survival in bags with ice block were 100%for stocking densities 60, 80, 100 fish/60 lit bag, 95.1%for 120 fish/60 lit bag and 84. 7%for 1-10 fish/60 lit bag (mean temperature 23.5~?C). Mortalities were recorded in all the bags without ice block but the highest survival was in the bag with stocking density 60fish/60 lit bag (mean temperature 29.2~?C).
    Description: includes:- 3 tables.;6 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Stocking density ; Transportation ; Fish culture
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    Influence of abattoir effluents on abundance of freshwater prawns Macrobrachium vollenhovenii, M. macrobrahion and M. felicinum of Lower Ogun River, Western Nigeria (2021)
    FISON | Kaduna
    In:  http://aquaticcommons.org/id/eprint/23281 | 19325 | 2018-03-28 15:57:48 | 23281 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The implications of the abattoir effluents discharge into the Lower Ogun River in Isheri-Olofin area on the abundance of three African fresh water prawns: Macrobrachium vollenhovenii, M macrobrachion and M. felicinum were assessed. Monthly prawn collections were undertaken using a scooping bag net with 0.05mm mesh size at three stations with 100m intervals in each of Ishasi (upstream) and Isheri-Olofin (downstream) areas of the river for 24months (January, 2006-December, 2007). For the 24month period, the upstream (pooled data from stations 1,2 and 3) had M. vollenhovenii of total and mean density of 27,938.33 prawn/m2 and 1164.60prawn/m2 1131.04 respectively, while total and mean M. vollenhovenii density of 5,815.43prawn/m2 and 243.81 prawn/m2 231.45 were obtained in the downstream (pooled stations 4, Sand 6 data). T-test showed the entire upstream to have significantly higher M. vollenhovenii density than the entire downstream (p〈0.05). The entire upstream had higher M. macrobrachium total and monthly mean density (19,092prawn/m and 816.44prawn/m2 1,354.28) than the entire downstream (6,384.47prwn/m2 and 266.02m2524.94) (p〈0.05). Also, significantly higher total and monthly mean density of M felicinum were obtained upstream (20,9S6.S0prawn/m2 and 873.46prawn/m21615.06) than downstream (10,9668.11prawn/m2 and 461.16prawn/m2975.19) (p〈0.05). The significance of the decline in abundance of each of the three Macrobrachium prawn species in the downstream area was discussed.
    Description: Includes:- 4 figs.;18 refs.
    Keywords: Biology ; Ecology ; Macrobrachium vollenhovenii ; Macrobrachium macrobrachion ; Macrobrachium felicinum ; Nigeria ; Ogun River ; freshwater environment ; Abundance ; Population density ; Shrimp fisheries ; Pollution ; Pollution effects ; Effluents
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    The impact of meteorological parameters on fish weight loss in the Kainji Solar Tent Dryer (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23285 | 19325 | 2018-03-28 16:10:49 | 23285 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Metrological parameters and their impacts on weight loss of fish inside Kainji Solar Tent Dryer were experimentally investigated. Drying experiments were conducted in solar dryer across the five agro ecological zones of Nigeria. During the drying experiments, the parameters such as temperature, relative humidity were lowest. The study showed that meteorological parameters were the primary determinants for fish drying within the Kainji Solar Tent Dryer, since weight loss during the experiment followed the pattern of these parameters
    Description: Includes:- 2 tables.;2 figs.;5 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Processing fishery products ; Drying ; Solar power
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  • 89
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    Population dynamics of periwinkle Tympanotonus fuscatus var fuscatus (Linnaeus, 1758) in the Bonny Estuary, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23289 | 19325 | 2018-03-30 14:45:43 | 23289 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The growth, mortality and recruitment pattern of Tympanotonus fuscatus var fuscatus were investigated using shell length (SL) - frequency data obtained from the mangrove swamps of the Bonny River, population. Computer based software package FiSAT (FAO - ICLARM Fish Stock Assessment tool) were used for the analysis. Sampling was done between January to December, 2004. Results obtained showed relatively high growth, low mortality and recruitment pattern with two peaks annually.
    Description: Includes:- 2 tables.;1 fig.;11 refs.
    Keywords: Ecology ; Fisheries ; Tympanotonus fuscatus var fuscatus ; Nigeria ; Bonny Estuary ; freshwater environment ; Population dynamics ; Growth rate ; Mortality ; Recruitment
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  • 90
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    Sediment quality of lower reaches of Okpoka Creek, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23283 | 19325 | 2018-03-28 16:00:48 | 23283 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The sediment is the ultimate sink of contaminants in the aquatic systems. The physico-chemical quality of sediments lower reaches of Okpoka Creek was assessed for two years (wet and dry lsons).Sediment samples were collected at low and high tides from three stations according to standard methods. These were analysed for sediment particle size (sand, silt and clay), pH, total hydrocarbon (THC), total organic matter (TOM), total organic carbon (TOC) and conductivity. Analysis of variance (ANOVA), Duncan multiple range (DMR) and Pearson correlation cofficient were used to analyse the data. The sediment consisted of sand (57.86 ~c2.65%); silt 17.47~c1.68%) and clay (24.67~c1.33%). Sediment particle size showed significant spatial variation (p〈 0.05).The sediment values pH (5.22~c0.27) and THC (0.24 ~c0.05g/g) were low unlike TOM (2.42~c0.26%), TOC (1.43~c0.17%) and conductivity (5077.61~c 847.88s/cm).The TOM and TOC values exceeded FEPA and USEPA acceptable levels in sediments. The presence high levels of TOM and TOC indicate organic pollution in the lower reaches of Okpoka Creek. Therefore, environmental surveillance of these parts of the creek is advocated.
    Description: Includes:- 2 tables.;1 fig.;12 refs.
    Keywords: Earth Sciences ; Pollution ; Nigeria ; Okpoka Creek ; freshwater environment ; Sediment analysis ; Sediments ; Sediment chemistry ; Sediment load ; Pollution
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  • 91
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    The length-weight relationship and condition factor of Citharinus citharus citharus in Lake Kainji, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23314 | 19325 | 2018-03-30 15:25:47 | 23314 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The length - weight relationship and condition factor of Citharinus citharus citharus was studied for a period of twelve (12) months from Lake Kainji, Nigeria. Nine hundred and eighty nine (989) fish samples (Citharinus citharus citharus) with total length ranging from 100mm to 530mm and weight ranging from 31.00g to 2250.00g were analysed. The results showed that the values of a, b and r were 0.0039, 3.2134 and 0.8997 respectively. The condition factor(K) values varied from 2.9 to 4.5, which means that the growth pattern of the fish is based on the value of 'a'. the fish species are also living well in the Lake as the 'K' are greater than one.
    Description: Includes:- 2 tables.;9 refs.
    Keywords: Ecology ; Fisheries ; Citharinus citharus citharus ; Nigeria ; kainji L. ; freshwater environment ; Condition factor ; Length-weight relationships
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  • 92
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    Clinical changes observed in Clarias gariepinus (Burchell 1822) fed varying levels of ascorbic acid supplemented diets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23328 | 19325 | 2018-04-06 16:06:27 | 23328 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study was undertaken to observe the clinical changes associated with the dietary ascorbic acid supplementation in the diet of African catfish, Clarias gariepinus, using the presence or absence of scorbutic (ascorbic acid deficiency) symptoms as indices. Clarias gariepinus fingerlings (6.02~c 04g) were randomly distributed into glass tanks of 60 x 45 x 45cm3 dimension at ten fish per tank in a triplicate treatment. Five diets containing 40% crude protein was formulated. Ascorbic acid (AA) was supplemented in the diets as ascorbyl-2-polyphosphate (a mixture of phosphate esters of ascorbate). Each treatment had varying levels of ascorbic acid (AA) supplementation, at 0 (Control) 50, 100, 150 and 200mg AA/kg, in Treatments 1, 2, 3, 4 and 5 respectively. Fish were fed practical diets twice daily at 900hrs and 1600hrs. Weekly weighing of fish was done and data collected were subjected to statistical analysis. At the end of week 4, fish fed scorbutic diets (diets without Ascorbic acid) had significantly lower weight than fish fed AA supplemented diets (P〈0.05). After week 6, fish fed scorbutic diet began to develop clinical symptoms including lordosis (lateral curvature), broken skull, pigmentation and scoliosis (vertical curvature). Radiographs confirmed defects in the vertebral columns of fish in this treatment. Highest mortality was recorded in this treatment as 30%, In all parameters considered, treatment 4 fed 150mg AA/kg gave the best AA supplementation that prevented growth reduction and clinical signs of AA deficiency.
    Description: Includes:-3 tables.;11 plates.;17 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Feeding experiments ; Fish culture
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    Study of ichthyofauna of Daberam Reservoir, Katsina State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23327 | 19325 | 2018-04-06 16:05:03 | 23327 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Research was carried out to explore the fish species diversity and study some aspects of the biology of fish of Daberam reservoir, Katsina state, Nigeria, for a period of three month from March to May 2009. Samples were collected from commercial fishermen and experimental fishing gears, preserved in formalin and taken to laboratory for identification; confirmation was done by fisheries experts. Eight genus comprising ten species were identified. The regression coefficient (b) was 3.07, 2.91 and 3.21 for the three most commercially importance species in the reservoir i.e. Oreochromis niloticus, and Clarias gariepinus respectively which indicated Positive allometric growth for O. niloticus and C. gariepinus and negative allometric growth for T. nilotica. The mean condition factor (k) was 1.140, with values of 1.027and 0.732 for O. niloticus and C. gariepinus, respectively. This indicates that the fish are not leaving well compared to other freshwater fishes.
    Description: 18 refs.
    Keywords: Ecology ; Fisheries ; Oreochromis niloticus ; Clarias gariepinus ; Nigeria ; Daberam Reservoir ; freshwater environment ; Fishery biology ; Biodiversity ; Species diversity ; Length-weight relationships ; Condition factor
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    Investment and employment potentials in fish farming in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23330 | 19325 | 2018-04-06 16:09:38 | 23330 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Investment opportunities in aquaculture that could lead to creation of employment in Nigeria was reviewed. Nigeria is a large fish consuming nation with the resource capacity to produce large quantity of fish for the country. The level of unemployment rate is increasing at an alarming rate. Employment opportunities in Agriculture sectors, in the area of Aquaculture deals with several sub sectors such as; seed production, transportation of live fish ,Water quality management, ornamental fish industries, supplies to aquaculture equipment and tools, aquaculture extension service, fish feed, fish meal production, fish processing, integrated rice-cum fish culture, and fish farm labor. These are all investment opportunities that can reduce unemployment, increase food security and poverty alleviation In Nigeria.
    Description: Includes:- 11 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Fish culture ; Investments
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  • 95
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    Food and feeding habit of Tympanotonus fuscatus var fuscatus (Linnaeus, 1758) in the mangrove swamps of the Bonny River, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23324 | 19325 | 2018-04-06 16:00:32 | 23324 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Studies on the food and feeding habit of T. fuscatus var fuscatus from the mangrove swamps of the Bonny River, Niger Delta revealed that the species is a deposit feeder but fed more on algae and protozoa. The variation of food types with season were determined from the numerical and frequency of occurrence methods of food analysis. The algae were of Stephanodiscus, Cosanodiscus. Navicula and Nitzschia species, while the protozoa were Arecella arenaria, Pseudodileptus and Trinema species. Feeding actively occurred at low tides, this coincided with the presence of algae on the mud surface. No qualitative seasonal variation occurred as T. fuscatus var fuscatus fed basically on the primary diets at all seasons.
    Description: Includes:-1 table.;1 fig.;9 refs.
    Keywords: Ecology ; Fisheries ; Tympanotonus fuscatus var fuscatus ; Nigeria ; Niger Delta ; freshwater environment ; Feeding behaviour ; Stomach content ; Food consumption ; Stomach ; Seasonal variations
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    Improved fish processing and preservation techniques in Lake Chad (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23336 | 19325 | 2018-04-07 17:13:31 | 23336 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Improved fish processing and preservation techniques in Lake Chad were carried out at Federal College of Freshwater Fisheries Technology, Baga, Borno State, Nigeria. Experiments were carried out using either Kainji Gas Smoking Kiln, Watanabe Kiln, Salting and Solar Drying. The improved (Modern) methods of preservation are faster, more durable, ensure a greater varieties of fish products, render bacteria actions ineffective and above all, products are more appetizing than the traditional preservative techniques but the latter are cheaper and easier to design with local materials.
    Description: Includes:- 3 table.;4 refs.
    Keywords: Fisheries ; Nigeria ; Chad L. ; freshwater environment ; Processing fishery products ; Curing ; Drying ; Processed fishery products
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    Evaluations off heavy metals in fish from Lake Geriyo Yola, Nigeria using x-ray fluorescence technique (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Description: Includes:- 1table.;11 refs.
    Keywords: Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
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    The role of middlemen in the marketing of smoked fish in Doron Baga Fish Market, Borno State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23332 | 19325 | 2018-04-07 17:07:41 | 23332 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: This paper examines the role of middlemen in the marketing of smoked fish in Doron Baga fish market of Kukawa Local Government Area of Borno State. Data were obtained from 200 respondents using stratified random sampling technique, with the aid of structured questionnaire. Data were analyzed using descriptive statistical tools. Secondary sources of information were also gathered from research papers, reports and journals. The study revealed that, there are two types of middlemen in the Doron Baga fish market: selling brokers (Dillali) accounting for 75% and buying brokers (Yan acha) 25%. The role played by the selling brokers includes selling for the fishermen with commission, lending money to fishermen and providing security for the unsold fish. Buying brokers assist those that want to buy fish while the buyer gives them little amount of money as commission. Brokers get more clients when the fish during periods of maximum catch. The problems the middlemen face are failure of the fishermen to pay back the money borrowed from the selling brokers while buyers hardly trust the buying brokers.
    Description: Includes:- 3 tables.;5 refs.
    Keywords: Fisheries ; Management ; Nigeria ; Baga ; Middlemen ; Fish marketing ; freshwater environment ; Marketing ; Market research
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  • 99
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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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    Production of earthworm meal for aquaculture (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23339 | 19325 | 2018-04-07 17:18:23 | 23339 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Three soil sample media (loamy, sandy and clayey) were used to culture earthworm, (Eudrilus eugeniae (Kinberg) in earthenware pots for ten weeks, under laboratory conditions. The aims of the research are to culture earthworms as replacement for fish meal, and to determine the best suitable soil medium for culturing and breeding of earthworms. Two sets of treatments were set up with the three soil samples; the experimental containing organic matter (cow dung) and the controls lacking organic matter. Watering was done every three days to keep the culture moistened. but not saturated. Results of the study showed that loamy soil had the highest number of earthworms harvested, followed by sandy and then clayey soil. Increase in number of harvested earthworms between the experimental and control groups differ significantly (P〈 O.05), with the experimental group having higher number of harvested earthworms. Loamy soil was the most favourable medium that enhanced the growth and survival of earthworms, when cultured under laboratory conditions, for fish meal replacement in aquaculture.
    Description: Includes:- 1 table.;2 figs.;10 refs.
    Keywords: Aquaculture ; Eudrilus eugeniae ; Nigeria ; Zaria ; Earthworm culture ; freshwater environment ; Aquaculture ; Breeding ; Cultured organisms
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