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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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    Over fishing as a factor responsible for declined in fish species diversity of Kainji, Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/22981 | 19325 | 2018-03-03 07:12:06 | 22981 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: It has been established that overfishing, among other factors, plays a vital role in the declining trend of fish species abundance in Nigerian freshwater bodies. This study examines past records of overfishing as a factor responsible for the decline in fish species diversity in Kainji Lake. Past studies over different periods were compared and patterns or trends of Kainji in fish yield in terms of species diversity considered. It was observed that the methods and intensity of fishing in the lake do not augur well for sustainable management of the lake's fishery resources. It was recommended that the authority should urgently put in place, favourable mechanisms and enabling environment for sustainable management of the country's inland waters.
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 79-85
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  • 3
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    Evaluations off heavy metals in fish from Lake Geriyo Yola, Nigeria using x-ray fluorescence technique (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Description: Includes:- 1table.;11 refs.
    Keywords: Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 69-71
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  • 4
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    Aquaculture investment in Nigeria: a case study of New Bussa (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23377 | 19325 | 2018-04-10 16:16:41 | 23377 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Hunger and malnutrition have remained amongst the most devastating problems facing the majority of Nigerian poor. These challenges and other social and economic objectives are the main forces driving aquaculture development to augment for food deficient, in particular fish, which is the cheapest source of protein. However looking at the aquaculture potential and the demand for fish, more needs to be done in aquaculture sub-sector. Unfortunately, despite the increase awareness, many people still remain skeptical about returns in aquaculture investment. This backdrop prompted the study, which empirically analyzed the situation based on two (2) semi-concrete ponds at NIFFR. The results which were extrapolated for five years shows a cost benefit ratio of 1.8, which indicated worthy investment. The results would essentially serve as guide to practitioners and intended fish farmers
    Description: Includes:- 5 tables.;12 refs.
    Keywords: Aquaculture ; Nigeria ; New Bussa ; Cost Benefit analysis ; freshwater environment ; Aquaculture ; Aquaculture development ; Costs
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 40-43
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  • 5
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    Bioaccumulation of heavy metals in freshwater Clarias anguillaris and Parachanna africana from Lake Geriyo in Yola, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23447 | 19325 | 2018-05-02 08:36:01 | 23447 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study was carried out to determine the bioaccumulation of heavy metals in Clarias anguillaris and Parachanna africana from Lake Geriyo Yola, Nigeria using energy dispersive X-ray fluorescence (EDXRF) spectrophotometer. The results in (mg/kg, dry weight) showed different levels of Cr, Cu, Mn, Fe, Ni, Zn, and Pb in the two fish species. The order of heavy metals accumulated by C. anguillaris and P. africana are Cr〉Fe〉Zn 〉 Mn〉Cu〉Ni〉Pb and Ni〉Fe〉Zn〉Cu respectively. The levels of Cr, Mn and Ni in C. anguillaris and in Ni in P. africana were higher than WHO and FEPA recommended maximum permissible limits (MPL) in fish, while the levels of Zn, Cu and Pb were below the standards. The results suggest that Lake Geriyo has high pollution loads of these heavy metals in fishes and could pose a health hazards to man. Consequently, close monitoring of heavy metal loads in Lake Geriyo is recommended with a view to minimizing the risks to health of the population that depend on the lake for their water and fish supply.
    Description: Includes:- 1 table.;13 refs.
    Keywords: Fisheries ; Pollution ; Clarias anguillaris ; Nigeria ; Geriyo L. ; freshwater environment ; Bioaccumulation ; Pollution effects ; Heavy metals ; Hazard assessment
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 185-188
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  • 6
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    Growth performance and nutrient utilization of common carp (Cyprinus carpio and Cyprinus carpio var specularis) fingerlings in New Bussa, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23424 | 19325 | 2018-04-25 19:30:19 | 23424 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: An investigation was carried out into the growth performance and nutrient utilization of common carp fingerlings in New Bussa, Nigeria, at the Hatchery Complex of National Institute of Freshwater Fisheries Research (NIFFR). The Carps were purchased from Jos, and transported to New Bussa, acclimatized for two weeks and stocked in outdoor concrete tanks measuring 2mx2mx1m containing filtered water to the level of 0.5m. Average weight and total length at the time of stocking were 40.80g and 6.30g respectively. The fish were stocked in four treatments, each replicated thrice at varying stocking densities of 3, 6, 9 and 12fish/m2 respectively. The fish were fed 35% crude protein formulated feed at 5% biomass and each daily feed was divided into two equal parts and fed manually by 9.00am and 6.00pm. Quantity of feed adjusted according to weight gain. Biweekly sampling was carried out for a period of 8 weeks, their morphological studies carried out. Weight gain, total length and feed consumed were recorded. Water parameters were monitored every sampling day. The result revealed that there is significant difference (P〈0.05) in all the parameters. The group with 48 (12 fish /m2) density exhibited significantly (P〈0.05) poorest weight gain and there was no significant difference (P〉0.05) between 12 and 24 stocking (3 and 6 fish/m2) densities as far as weight gain is concern. All other parameter; SGR, length, weight gain and feed consumed were also significantly different (P〈0.05). The treatment with 12fish/m2 showed significantly (P〈0.05) poorest feed conversion ratio (FCR). The treatment with stocking of 3 and 6fish/m2 performed best, therefore this stocking range is recommended in this zone. Acquiring of carp from colder region to hotter region is better done in the peak of raining season and to be transferred to earthen pond before hot weather resumes.
    Description: Includes:- 13 refs.
    Keywords: Aquaculture ; Cyprinus carpio ; Cyprinus carpio var specularis ; Nigeria ; New Bussa ; freshwater environment ; Growth rate ; Nutritional requirements ; Feeding experiments ; Fish culture ; Food conversion
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 60-63
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  • 7
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    Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23255 | 19325 | 2018-03-25 14:40:53 | 23255 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The techniques for induced breeding of Clarias gariepinus has been developed and mastered by fish breeders. There is however no record of successful induced breeding of Heterotis niloticus in captivity. In this study, the reproductive indices of the ovaries, of the two fish species were compared. The ovaries of sexually matured samples were extracted and their weights measured. The mean gonadosomatic index (GSI) of C. gariepinus was 3.94% while that of H. niloticus was 1.61 %. The mean condition factor (K) was 5.28 in C. gariepinus while it was 2.03 in H. niloticus. Gonad and body weight relationship was positively correlated in both species (r = 0.69 in C. gariepinus and r = 0.37 in H. niloticus. Also, an inverse relationship existed between the body weight and GSI in the two species (r = -0.3 5 inC. gariepinus and r = -0.06 in H. niloticus.
    Description: Includes:- 2 tables.;15 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Heterotis niloticus ; Nigeria ; Ibadan ; freshwater environment ; Reproduction ; Gonadosomatic index ; Morphometry
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 280 - 283
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  • 8
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    Hatchability and survival of H. longifilis fertilized at varying latencies (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23307 | 19325 | 2018-03-30 15:16:37 | 23307 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In determining the optimum latency period of H. longifilis, of which the hatchability and higher Survival percentage were used as a determining factors to determine the optimum latency period of H. longifilis. The result from these varying latencies period shows that the best latency periods at the ambient temperature of 26degreesC, that support mass production and higher survival of H longifilis ranges between 15-19 hours. There was low or zero hatchability from the egg stripped early and the one stripped late.
    Description: Includes:- 1 table.;8 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Hatching ; Survival ; Breeding ; Induced breeding
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 140-143
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  • 9
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    Problems affecting fishers' livelihood and fisheries development in Kainji Lake Basin (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23405 | 19325 | 2018-04-12 08:56:24 | 23405 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This paper examines some critical factors related to fishers' livelihood, resource sustainability and development of fisheries sub-sector in Kainji Lake Basin (KLB). Based on empirical study the findings identified some major problems to include, lack of access to finance, deflation of resources, increase in fishers' population, extinction of some important fish species and gross lack of development activities etc. These arrays of problems form the complex nature of artisanal fisheries sub-sector, which impede substantial income generation well-being of the fishers' and development of the sector. The paper made some policy recommendations to serve as guide to relevant authorities in addressing the fishers' problems.
    Description: Includes:- 3 figs.;6 refs.
    Keywords: Fisheries ; Nigeria ; Kainji L. ; freshwater environment ; Fishery management ; Resource management ; Fishery development
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 153-156
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  • 10
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    The marketing and distribution of fish in New Bussa fish market area of Niger State (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23237 | 19325 | 2018-03-18 15:16:31 | 23237 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: Fish marketing and distribution in New-Bussa market was studied weekly for three months (August -October, 2005). The result showed that the major fish species common in New-Bussa fish market are Clarias,Citharinus,Mormyrus,Bagrus,Alestes, Synondontis,Lates, Chrysicthyes, Tilapia, Hydrocynus and Clarotes. The business of catching, marketing and distribution of fish is controlled by young men and women of the age bracket of 14-40 years old. Over 15 different ethnic groups from 14 states in Nigeria and Ghana, Chad, Benin Republic, Mali are involved in fish marketing and distribution business in New-Bussa. The indigenous ethnic groups are Gungawa, Busawa, Kambari, and Nupe, they formed 65% of the ethnic groups found in New-Bussa. The remaining ethnic groups are migrants. Women dominated the trading and processing of fish.
    Description: Includes:- 4 tables.;7 figs.;5 refs
    Keywords: Fisheries ; Management ; Nigeria ; New Bussa ; freshwater environment ; Marketing ; Market research ; Fish
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 172 - 178
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