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  • 1
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    Capacity building and training requirement for effective fisheries and aquaculture extension in Nigeria (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23216 | 19325 | 2018-03-17 12:51:36 | 23216 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: This paper examines the importance of capacity building and training requirement for the benefit of fisheries and aquaculture extension in Nigeria. It involves the analysis of secondary data bothering on the management of agricultural extension in Nigeria over time vis-avis various agricultural development programmes in the past in which fisheries and aquaculture extension was apparently de-emphasized in favour of crop and livestock agriculture. It is therefore recommended as a way forward that a favorable reform in the Nigerian agricultural extension system will be a necessary avenue to put fisheries and aquaculture extension in proper perspective for effective service delivery which will be a good entry point to achieving the millennium development goals of combating hunger, extreme poverty and attainment of food security in Nigeria.
    Description: Includes:-7 refs.
    Keywords: Aquaculture ; Fisheries ; Information Management ; Nigeria ; Extension services ; freshwater environment ; Technology transfer ; Training ; Education ; Sociological aspects
    Repository Name: AquaDocs
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  • 2
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    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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  • 3
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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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    Format: 86 - 90
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  • 4
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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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  • 5
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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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  • 6
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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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    Format: 219 - 221
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  • 7
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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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  • 8
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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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  • 9
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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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  • 10
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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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  • 11
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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
    Repository Name: AquaDocs
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    Format: 42-44
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  • 12
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    Evaluations off heavy metals in fish from Lake Geriyo Yola, Nigeria using x-ray fluorescence technique (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Description: Includes:- 1table.;11 refs.
    Keywords: Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
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  • 13
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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
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    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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  • 14
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    Status of fisheries and aquaculture development in Ekiti State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23340 | 19325 | 2018-04-07 17:19:26 | 23340 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Ekiti State has limited water surface area but blessed with some rivers and seven big reservoirs on which some artisanal fishery is being carried out by over 400 fisher folks. Fish farming in Ekiti state is largely dominated by Clarias gariepinus culture. Interest in fish farming is on the increase as farmers construct concrete fish tanks as small as 1.5m2 as well as series of contour earthen ponds or tanks as big as 30m2. The total number of ponds has grown numerically from 96 at the inception of the state in 1996 to about 2000 in 2008. The move towards private/public partnership in aquaculture development will improve the economic and nutritional status of the region.
    Description: Includes:- 1 table.;3 figs.;5 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ekiti State ; freshwater environment ; Fish culture ; Freshwater aquaculture ; Aquaculture ; Artisanal fishing ; Fishery development ; Stock assessment
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  • 15
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    Nutritional value of mango (Mangifera indica) seeds and peels (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23344 | 19325 | 2018-04-08 11:33:10 | 23344 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The nutritional value of peels and' ~eds' 9f Mango, Mangifera indica was studied by analyzing collected samples of these non conventional feedstuffs for their proximate composition. The result of the analysis shows that moisture ranged from 9.70 to 10.48% (peels) and 9.50 to 10.48% (seeds). Protein ranged from 4.08 to 4.49% (peels) and 5.38 to 8.10% (seeds). Carbohydrate was 49.35 to 62.45% (peels) and 53.64 to 70.58%' (seeds). Fat ranged from 3.98 to 6.30% (peels) and 8.30 to 12.80% (seeds. Ash content ranged from 2.20 to 4.98% (peels) and 2.00 to 3.70% (seeds). The values for the proximate parameters of the peels and seeds were comparable to values reported for other non convectional feedstuffs. The seeds of ti1'ango had higher values than peels.
    Description: Includes:- 3 tables.;1 fig.;20 refs.
    Keywords: Aquaculture ; Nigeria ; Mango ; freshwater environment ; Nutritive value ; Carbohydrates ; Chemical composition ; Feed composition ; Chemical analysis
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  • 16
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    Vocational training of Nigeria unemployed youths in Northeast Nigeria as fish farmers: a means of ensuring food security (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23350 | 19325 | 2018-04-08 11:52:47 | 23350 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Vocational training for unemployed youths as fish farmers plays an important role in meeting fish protein need of Nigeria, contributing immensely to the national economy by providing nutritious food for the populace, creating jobs and enhancing national health and wealth. Youths are the leaders of tomorrow thereby their contribution towards food security is important. The study considered their opinion on the training based on skills acquired during a-6-week intensive vocational training. Results show that most trainees (97.03%) are within the economically active age group of 20-39years. Most trainees were confident that the programme will ensure food abundance and have a great impact on national economy. They also considered the training helpful and not only to their immediate families but also to the country at large. Skills were acquired in 8 various enterprises of fisheries but most trainees (43.56%) show greatest interest in fish fingerlings production through induced breeding, a situation that could boost aquaculture in Nigeria in few years to come. According to the trainees, the programme is laudable, and came at the right time when Nigeria is agitating to be put among the economically developed nations. However, youths exercise fear over inconsistency that could impede the progress of the programme. Recommendations are made on how to ensure better food security through a laudable programme of this nature.
    Description: Includes:-8 tables.;4 refs.
    Keywords: Aquaculture ; Information Management ; Nigeria ; Vocational Training ; Extension Services ; freshwater environment ; Training
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  • 17
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    Sustainable production of mangrove oyster Crassostrea gasar (Adanson, 1757) in Rivers State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23356 | 19325 | 2018-04-08 12:07:41 | 23356 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: The mangrove oyster, Crassostrea gasar inhabits the estuarine/coastal mangrove swampland of the Niger Delta. It can be found in the wild attached permanently to mangrove trees and any other hard substrate in the water. It thrives well in brackish water with a wide salinity and temperature range. The oyster has a high economic value and is accepted both locally as food. The table sized mangrove oysters sold in markets in Rivers State are from the wild. The culture potential of the oyster is yet to be explored in the State; despite the fact that details of culture techniques for the mangrove oyster have been fully documented by scientists at the African Regional Aquaculture Central Nigerian Institute for Oceanography and Marine Research, (ARACINIOMR). This paper highlights techniques for the production of table sized oyster and environmental issues that could affect long term sustainable oyster farming.
    Description: Includes:- 10 refs.
    Keywords: Aquaculture ; Crassostrea gasar ; Nigeria ; freshwater environment ; Mangroves ; Oyster culture ; Oyster fisheries
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  • 18
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    Growth and survival of different sex combinations of Oreochromis niloticus (L) in glass tanks (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23354 | 19325 | 2018-04-08 12:03:29 | 23354 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Growth performance and survival rates of three different sexes of Oreochromis niloticus fingerlings (27.5~c 0.02g); mixed-sex, all male and all female fed 35% CP at 5% body weight was carried out for 56 days in indoor rearing operations. Aquaria tanks (60x30x 30cm3) were used as rearing tanks and each treatment was replicated. All female tilapia had the best specific growth rate (2.54%/day), food conversion ratio (1.98) as well as survival rate (98%), least value was obtained in treatment containing the mixed sex tilapia. Specific growth rate (2.06%/day), Food conversion ratio (2.27) and survival rate (95% ).
    Description: Includes:-2 tables.;1 fig.;7refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; New Bussa ; freshwater environment ; Survival ; Sex ratio ; Food conversion ; Fish culture ; Feeding experiments
    Repository Name: AquaDocs
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    Opportunities for shrimp farming in the Niger Delta: dilemma of sustainable production in the absence of regulatory framework (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23357 | 19325 | 2018-04-08 12:09:40 | 23357 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Commercial shrimp farming has been practised for several decades in many countries of the world over. High demand for shrimps and corresponding high returns on investment has played major roles in the expansion of the industry. In Nigeria, farming shrimps is still novel. Notable research work includes studies conducted at the Nigerian Institute for Oceanography and Marine Research, African Regional Aquaculture Centre and Institute of Oceanography, University of Calabar. Niger Delta has potentials for farming shrimps - suitable sites, good candidate shrimp species, high local demand with potentials for export. However the major challenge would be the availability of guidelines to regulate farming activities especially as concerns the use of potentially toxic compounds in shrimp farms which could lead to deleterious effects in the environment. Efficient regulatory bodies/agencies to ensure sustainability of production system and compliance to stipulated guidelines will go a long way in the protection of the environment.
    Description: Includes:- 2 tables.;15 refs.
    Keywords: Aquaculture ; Nigeria ; Niger Delta ; freshwater environment ; Shrimp culture ; Shrimp fisheries
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    Toxicity of promethazine hydrochloride (Phenergan) to Clarias gariepinus fingerlings (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23360 | 19325 | 2018-04-08 17:55:59 | 23360 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The acute toxicity of promethazine hydrochloride (phenergan) to Clarias gariepinus fingerlings was conducted using static bioassay under laboratory conditions. The 96h LC50 was determined as 172.5 mg/1. Mean mortality was 5, 10, 20, 50, 100% in the concentration of 69, 103.5, 138.0, 172.5 and 207 mg/1 respectively, while there was no mortality in the control treatment. There were significant differences (P〈0.05) on the effect of concentration, the higher the mortality of C. gariepinus fingerlings while toxicity of phenergan increased with duration of exposure. C. gariepinus showed increased hyperactivities, cell deformation, lesions and necrosis during the period of exposure. The physicochemical parameters also showed a slight increase as the concentration increased.
    Description: Includes:- 2 tables.;9 refs.
    Keywords: Aquaculture ; Ecology ; Pollution ; Clarias gariepinus ; Nigeria ; stress ; freshwater environment ; Toxicology ; Histopathology ; Biological stress
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  • 21
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    Fisheries and aquaculture development in Nigeria: an appraisal (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23366 | 19325 | 2018-04-08 18:05:14 | 23366 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Nigeria has a coastline of 853km and over 14 million hectares of inland waters and thus owns significant fisheries. The contribution of fisheries to the Nigerian economy is significant in terms of supply of high quality dietary protein, income generation, creation of employment and enhanced inflow of foreign exchange earnings through shrimp export. However, due over-exploitation of the natural resources, by-catch and discard problem, inadequate infrastructure and social amenities development, inadequate supply of fish feed, fish seeds and slow adoption of new technology and management strategies etc. The domestic fish production (0.55 million tons) has fallen short of the demand (1.5million metric tons). Aquaculture development is the solution to the unpredictable production through capture or artisanal/industrial fisheries.
    Description: Includes:- 21 refs.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; freshwater environment ; Aquaculture ; Brackishwater aquaculture ; Freshwater aquaculture ; Marine aquaculture ; Aquaculture development ; Fishery development
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    Efficacy of formalin in the removal of adhesiveness from Clarias gariepinus eggs during artificial propagation (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23358 | 19325 | 2018-04-08 12:11:51 | 23358 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The aim of this study was to establish the efficacy of formalin in removing the adhesiveness of Clarias gariepinus eggs during artificial propagation and the effects on prospective fry. 1g of catfish eggs were put in five concentrations of formalin \{O.O (control), 0.4, 0.6, 0.8 and 1.0 mg/l\} at three exposure times (10, 15 or 20min). In each treatment, the detachment of eggs increases with exposure time but were not significantly different (P〉O.05). 0.4mg/1 of formalin had the highest number of detached eggs. At the highest formalin concentration 72% of the eggs still adhered together which provide a good substrate for the growth of fungi. The use of formalin delayed hatching of C. gariepinus eggs when compared with the control. The more the exposure period of C. gariepinus eggs to formalin, the higher the hatching time. Survival of fry was highest in the group that has been exposed to 0.4mg/1 and exposure period of l0min. At the highest concentration (1.0mg/l) and exposure period (20min), the survival was lower by 55.5%. Based on this study, the optimum concentration of formalin was O.4mg/l and exposure period of l0min. for the removal of egg adhesiveness, increase hatching and improved survival success of C. gariepinus.
    Description: Includes:- 4 figs.;10 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Akure ; freshwater environment ; Preservatives ; Anticoagulants ; Coagulants ; Dispersants ; Fish culture
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  • 23
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    Gender issues in economics of fish farming in Maiduguri and environs (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23362 | 19325 | 2018-04-08 17:58:42 | 23362 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study focused and examined gender issues in economics of fish farming in Maiduguri and its environs. The socio-economic characteristics of the fish farmers were examined. The profitability of the industry and constrains affecting fish farming in the study area were analyzed. Stratified random sampling technique was used due to the heterogeneous nature of the population considering 30% of the fish farmers as the sampled size. Descriptive statistics and net farm income were used to analyse the data obtained. It was revealed that 81.25% of the respondents were male while female fish farmers represented 18.75% of the respondents. 84.40% of the respondents had tertiary education while farmers with secondary certificate and adult education constituted 12.50% and 3.10% respectively. Net farm income profitability analysis of male and female farmers were N193,767:00 and N445,557:00 respectively. It was also observed that the major constraints militating against fish farming in the study area were scarcity of fingerlings, lack of improved technology, inadequate capital, high cost of equipments, lack of land and management difficulties. It was recommended that adequate training, continuous capacity building and improved technology in fish production must be made available to farmers: and farmers should have access to sources of fingerlings.
    Description: Includes:- 3 tables.;2 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Maiduguri ; Women in Fisheries ; freshwater environment ; Sex ; Fish culture ; Women
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    Evaluation of Afzelia africana seeds as protein feedstuff in fish diets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23368 | 19325 | 2018-04-08 18:08:23 | 23368 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Seeds of the legume Afzelia africana were analyzed and evaluated for use as protein feedstuff in fish diets. The seeds were heated to inactivate the anti-nutritional factors. Two iso-nitrogenous diets (26%) were produced using A. africana or Bonga-fishmeal as protein sources and labeled FI and F2, respectively. The resulting pellets were sinking pellets and were well accepted by tilapia based on the reaction time to feed presence and proportion of pellets eaten within one hour. Fl pellets were more stable in water than F2 pellets with mean dissolution times of 190 mins and 135 mins, respectively
    Description: Includes:- 7 tables.;4 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Feeding experiments ; Feed composition ; Feed preparation ; Nutritional requirements ; Nutrition ; Fish culture
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    Survival and response of Oreochromis niloticus to different feeds (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23374 | 19325 | 2018-04-10 16:10:47 | 23374 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The study determined the survival and the response of Oreochromis niloticus to different feeding compositions. 90 Oreochromis niloticus juveniles were fed different diets in triplicated treatments inside glass tanks. Treatment I comprised locally compounded diet; Treatment II, imported pelletized feed; and Treatment III - processed feathermeal based diet. Results showed that there was no significant differences (P〉0.05) in the weight gain, feed intake, survival and feed conversion ratio. However, Treatment I had the highest feed intake, while treatment n had the highest weight gain and feed conversion ratio.
    Description: Includes:- 4 tables.;21 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Feeding experiments ; Feed preparation ; Nutritional requirements ; Fish culture ; Survival
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    Genetic improvement of tilapia: challenges and prospects in Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23373 | 19325 | 2018-04-10 16:09:38 | 23373 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The contribution of tilapia aquaculture in Nigeria to world output is negligible due to stunting, poor market value among others. This paper evaluates the aquacultural credentials of tilapia, some genetic improvement technology in cultured tilapia, namely, ploidy, hormonal sex reversal. transgenic, hybridization, and the necessity of Genetic Improvement in accelerating tilapia production in Nigeria. Investigation reveals the presence of O. niloticus with the highest growth perfermancc index (~h1=3.11) for Lake Kanji which indicates high growth potential in suitable culture environment and could serve as a good starting point for genetic development. The presence of ”wesafu”, an ecotype cichlid, endemic to Epe lagoon, Lagos, which grows to 1500g in the wild, appears to be an excellent candidate for genetic improvement of a commercial strain for the growing aquaculture industry. Tilapia Genetic improvement in Nigeria is faced with a number of setbacks. This includes short- term, scattered and disjointed funding, inadequate genetic research facilities, ecological risk, inadequate skilled manpower and poor documentation of tilapia genetic resources among others. Considering the growing importance of tilapia culture, the need to document, conserve, evaluate and utilize tilapia genetic resources is highlighted to enhance the success of food security in Nigeria.
    Description: Includes:- 3 tables.;26 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Fish culture ; Genetics ; Selective breeding
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    Body-weight variations in four week old Clarias gariepinus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23371 | 19325 | 2018-04-10 16:06:58 | 23371 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The variation in size and weight of fry and fingerlings of Clarias gariepinus has been a major factor affecting the success of hatchery production of the species. It encourages cannibalism, thus reducing the overall survival. The disparity in weight and population was assessed to determine the necessity of sorting as a reliable method of controlling size disparity and mortality in hatchery production. Two-week-old fry with average weight of 15mg and length range of 0.8-0.9cm were randomly sampled and stocked at 200 fry/litre in 30 litre circular tanks. The fish were fed for four weeks on 45% crude protein diet, ad libitum. At the end of four weeks, there were three groups; large, medium and small with mean weight of 4.02g, 1.24g and 0.17g, respectively. The cumulative mean weight was 1.8g, population ratio was 1:8:10 for large, medium and small, respectively.
    Description: Includes:- 1 fig.;10 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Fingerlings ; Fry ; Weight ; Survival ; Induced breeding
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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
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    An integrated chicken-fish system in concrete ponds (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23380 | 19325 | 2018-04-10 16:41:16 | 23380 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Four treatments (in duplicate) were used to detennine the optimum combination ratio in the chicken-fish integrated system in 4 m2 concrete ponds. Treatment I (TI) consisted of a concrete pond integrated with one point-of-lay chicken while treatment 2 (T2) had two point-of-Iay chickens integrated over a concrete pond. Treatment 3 (T3), consisted of three point-of-lay chickens integrated over a pond and treatment 4 (T4) was the control and involved no integration. Each concrete pond was stocked with a poly-culture of Oreochromis niloticus and Clarias gariepinus in a ratio of 3:1. Compounded fish feed was used to feed the fish in T4 twice daily at 5% of their body weight while fish in TI. T2 and T3 fed on wet chicken manure and spilled chicken feed that fell directly into the ponds. The daily manure loading rate ranged from 55.80g in TIR2 (treatment l replicate 2) to 117.37 g in T3RI while spilled feed loading rate ranged from 2.52 in T2R2 to 9.27g in T3R2. The total number of eggs laid was 871 in 84 days. For C. gariepinus, fish in T4RI had the highest mean weight gain of all the treatments and TIRI, the lowest. T3R2 had the highest mean weight gain of all the integrated treatments. For O. niloticus fingerlings, fish in T4 which were fed compounded feed had the highest mean daily weight gain and while those in T1 had the lowest. T4RI fish had the highest mean weight gain while TIR2 fish had the lowest. Fish in T3 had the highest mean weight gain of all the integrated treatments followed by fish in T2. However, physico-chemical parameters were more adverse and survival was lower in T3 than in T2 and so a combination ratio of 20 fingerlings in a 4 m2 concrete tank integrated with two laying chickens (mean weight 1.93 kg) is recommended. This translates to 50 laying chickens/100 m2 concrete pond stocked with 500 fingerlings.
    Description: Includes:- 3 tables.;Refs.
    Keywords: Aquaculture ; Nigeriaa ; New Bussa ; Rice-Fish- Culture ; Poultry-Fish-Culture ; freshwater environment ; Fish culture ; Rice field aquaculture ; Agropisciculture
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    Improved floating diets for African catfish and Nile tilapia (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23386 | 19325 | 2018-04-10 16:51:37 | 23386 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Flotation potentialities of diets bound with Polymethylo-cabarmide and other local starches and Saccharomyces cerevisiae floater were investigated in the laboratory. The binders and floater were fixed at 10 and 4% respectively in isonitrogenous 30% crude protein diets for catfish and Tilapia. Flotation were significantly (P〈0.05) highest (100.00 - 96.67%) in Polymethylo-cabarmide based binder. Wheat grains starch (WGS) was highest (p〉O.05) among the local agents in the first 10 minutes. Cassava tuber starch (CTS) significantly (P〈0.05) succeeded WGS from 15 minutes till end of immersion. The least effective was maize grain starch (MGS).
    Description: Includes:- 1 table.;1 fig.;19 refs.
    Keywords: Aquaculture ; Nigeria ; New Bussa ; Floating Fish Feed ; freshwater environment ; Feed ; Feed composition ; Feeding experiments ; Feeding ; Artificial feeding ; Nutrition
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    Efficiency of vocational training of Nigeria unemployed youths in Northeast Nigeria as fish farmers (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23349 | 19325 | 2018-04-08 11:49:52 | 23349 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Vocational training for unemployed youths plays an important role in solving the problem of unemployment in Nigeria, assisting the teeming unemployed youths to find their footing in society as responsible citizens and for wealth building and creation. Youths as participants are the major actors in appraising the vocational training. The study probed into the activities of these youths during their six weeks stay at the Federal College of Freshwater Fisheries Technology, Baga. Result shows that most trainees (81.19%) were within the age range of 20-29 years. 94.06% were males while 5.94% were females. Desires for self employment made these youths to participate in vocational training as many of them (51.49%) are in total unemployment while the rest are involving in menial jobs. Skills were acquired in 8 different fisheries enterprises and these include Fish production, fish processing technology, fish feed production technology, boat construction, aquarium construction, fish marketing, extension methods and fishing gear construction and maintenance. Most trainees (43.56%) preferred and show enthusiasm for fingerlings production through induced breeding. Trainees were from 41 local government areas in 7 states in the North-east Nigeria. Virtually all participants performed above average, a result that is encouraging if aquaculture must develop and solve unemployment problem. Vocational training has distortions that impede its efficiency.
    Description: Includes:- 5 tables.;4 refs.
    Keywords: Aquaculture ; Information Management ; Nigeria ; Vocational Training ; freshwater environment ; Training
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    Bioaccumulation and carbohydrate levels of Tilapia zillii exposed to sublethal concentrations of lead and copper (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23353 | 19325 | 2018-04-08 12:01:37 | 23353 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Tilapia zilili is a commonly cultured fresh water fish and of major economic importance in tropical and subtropical countries throughout the world. Effect of the sub lethal concentrations of copper and lead to T. zillii for 12-week exposure period was carried out. The elements were assayed using Shimadzu AA 6200 atomic absorption spectrophotometery and the results were given as ~k/g dry wt.The bioaccumulation factors of lead and copper were significantly (P〈0.05) higher in treated fishes than the control. Effect of these metals on the quantitative carbohydrate levels in the plasma, muscle and liver were observed. The different concentrations of the various heavy metals caused significantly (p〈0.05) corresponding decrease in the fish muscles and liver glycogen levels.
    Description: Includes:- 1 table.;2 figs.;8 refs.
    Keywords: Aquaculture ; Health ; Pollution ; Tilapia zillii ; Nigeria ; freshwater environment ; Bioaccumulation ; Pollution effects ; Sublethal effects ; Toxicity tolerance ; Copper ; Heavy metals ; Lead
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    Utilization and growth response of Clarias gariepinus fingerlings fed varying inclusion levels of livestock vitamin grower´s premix (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23365 | 19325 | 2018-04-08 18:04:12 | 23365 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 70 day experiment was conducted to determine the correct level of inclusion of livestock vitamin premix in the diet of Clarias gariepinus fingerlings and to monitor the utilization efficiency and growth performance of the test fish. 180 fngerlings of C. gariepinus were randomly distributed to six treatments, each weighing 0.76 ~c 0.05g. Thirty fingerlings per treatment were used. Each treatment had varying levels of livestock vitamin premix except the control that had no additional vitamin premix. Weighings of fish were done weekly and feed adjusted accordingly. The data collected were subjected statistically to descriptive and analysis of variance. All the treatments were significantly different from each other and also from the control at (P 〈 0.05). The highest mean weight gain was recorded in treatment 5 (0.910) which had 2% premix inclusion. The carcass analysis showed Ts with the highest crude protein level (64.43%). The highest daily and weekly mean weight gain were recorded in treatment 5; O.013g and 0.130g respectively. The feed conversion ratio (FCR) was lowest in T1, (2.147). The FCR for T5 (2.535) was insignificantly different (P 〈 0.05) from T1,. The fish feed control had the best FCR. T5 had the best utilization and growth performance when the average weight gain and the carcass crude protein composition and energy were compared. The fat deposited in fingerlings fed T5 were moderately (5.63) lower than treatment 6 with 5.86. It can be concluded that the fish fed treatment 5 will be less fatty than fish fed treatment 6 but more fatty than the fish fed the controls.
    Description: Includes:- 5 tables.;12 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; freshwater environment ; Feeding experiments ; Feed composition ; Feed preparation ; Fish culture ; Vitamins
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    Evaluation of Nile tilapia (Oreochromis niloticus L.) fed dietary potato peels as replacement for yellow maize (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23361 | 19325 | 2018-04-08 17:57:30 | 23361 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The recent increase in the numbers of fast food vendors in Akure means that large quantities of Irish potato peels will be generated and discarded with high propensity for causing environmental pollution. Also the prize of maize in Akure has increased by about 31 % between January and August 2009. Therefore, the present study evaluated the bio-economic use of Irish potato peels in Nile tilapia diets with a view to achieving environmentally friendly and cost effective fish production. Nile tilapia (29.4 ~c 1.40g) was fed five diets (01-05) in glass tanks for 56 days. The basal diet (01) contained 26% yellow maize and 35% CPO Then the yellow maize in diets 02-05 was replaced with potato peels at 10, 20, 30 and 40% respectively. At the end of the experiment, growth of the fish was statistically the same in all treatments. However, fish fed 03 and 04 showed uniform and best potentials while the fish fed 05 had the worst performance indicating 30% replacement as the optimum. Economic estimation showed that lkg diet costs about (N81.6-N103.6) depending on the level of potato peels inclusion in the diets while (1.12-1.67kg) of fish was produced from each treatment with 85-95% survival rate of the fish. Incidence of cost (IC) showed marginal variations among the treatments with 30% replacement having the least and 40% replacement the highest costs of fish production. 40% replacement had the highest IC because of high mortality (15%) and poor growth of fish under the treatment. Similarly, the profit index (PI) was closely related with 30% replacement having the highest profit margin. In conclusion, both growth and economic indices established that Irish potato peels can replace up to 30% of yellow maize in diets of Nile tilapia
    Description: Includes:- 4 tables.;7 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Akure ; Fish nutrition ; freshwater environment ; Feeding experiments ; Feed efficiency ; Fish culture ; Nutrition
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    Effects of feed colour on growth and nutrient utilization of Tilapia zillii (Gervais 1852) (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23363 | 19325 | 2018-04-08 17:59:50 | 23363 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A feeding trial was conducted for 75 days to determine the effects of feed colours on nutrient utilization and growth in Tilapia zillii fingerlings. Four different food colourant \{Food Drug and Cosmetic (FD and C) colour red, blue, green and yellow\} was added to a basal diet 350g crude protein and 18.5MJ gross energy/kg diet and fed to T. zillii. There were five diets in all, the control (normal light brown commercial diet) (Diet 1), red-coloured diet (Diet 2), and blue-coloured diet( Diet 3), green-coloured diet(Diet 4) and yellow-coloured diet (Diet 5) and fed to triplicate groups of T. zillii at 4% body weight. Ten (10) T. zillii (14.00:t 0.003g) fingerlings were stocked in each concrete tank making a total of 150 fingerlings. The growth performance of the fish fed the yellow-coloured diet (Diet 5) had the best growth performance and nutrient utilization with Feed conversion ratio (FCR) and Specific growth rate (SGR) of 0.031:t0.80 and 1.17:t0.On respectively, this was followed by fish fed green-coloured diet, followed by fish fed red-coloured diet, followed by the fish fed the control diet (normal light brown commercial diet) and lastly, the fish fed blue-coloured diet had the least growth performance.
    Description: Includes:- 2 tables.;1 fig.;1 plate.;11 refs.
    Keywords: Aquaculture ; Tilapia zillii ; Nigeria ; freshwater environment ; Feeding experiments ; Experimental culture ; Feed efficiency ; Fish culture
    Repository Name: AquaDocs
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    Water parameters in Ilaje Local Government Area Ondo State (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23364 | 19325 | 2018-04-08 18:02:40 | 23364 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Ilaje Local Government Area of Ondo State is blessed with many rivers, lagoons, tributaries lakes and a very long coastline, of about 180km making the State as a coastal state with the longest coastline in Nigeria. The people are predominantly fishermen. The fish produced from this area could be further boosted through farming of fish especially in cages along the available creeks at not much cost to the inhabitants. This study shows that the waters of the area were found optimal for fish production. This further buttressed by the fact that the area has been an active zone of fish production for ages. This historical perspective is been considered as the baseline in the study for perpetuating the culture of fish and other aquaculture species in the area
    Description: Includes:- 7 refs.
    Keywords: Aquaculture ; Limnology ; Nigeria ; Ilaje ; freshwater environment ; Fish culture ; Cage culture
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    Gut microflora of cultured and captured Clarias gariepinus (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23367 | 19325 | 2018-04-08 18:06:45 | 23367 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The diversity and microbial load of the micro flora inhabiting the gut sections of captured and the cultured Clarias gariepinus were investigated. The gut contents of the fish were isolated and characterized using standard method. The results of the characterization revealed the presence of bacteria and fungi in the guts of the fish. The bacteria isolated from the captured fish were Escherichia coli, Proteus vulgaris, Klebsiella mobilis, Enterobacter spp, Shigella spp, and Micrococcus varians while Citrobacter spp, Proteus vulgaris, Enterobacter spp, Escherichia coli, Serratia marcescens and Shigella spp were isolated from the cultured fish.. The fungi isolates found in the gut of the captured fish included, Penicillium chrysogenum, Fusarium spp and Rhizopus stolonifer while Aspergillus flavus, Candida albicans and Aspergillus fumigates were isolated in the cultured fish. The bacteria count obtained from the fore gut, mid gut and hind gut of the captured fish were; 1.4 x 1O-~B cfu/g, 1.7 x 1O-~B cfu/g and 2.7 x 1O-~B cfu/g while that of cultured fish had 2.8 x 10-~B cfu/g, 2.05 x 10-~Bcfu/g and 2.65 x 10-~Bcfu/g respectively. The spore count of the fungi isolated from the fore gut, mid gut and hind gut of captured fish ranged between 4.0 x 10-~B spore/g and 9.0 x 1O-~B spore/g while the count obtained from the cultured fish ranged between 3.0 x 10-~B and 9.05 x 1O-~B spore/g. The hind gut had the highest number of species and microbial load in both captured and cultured fish than the other region. Though, there was significant difference (P0.05). The results therefore suggest that there is diversity in microbial composition and microbial load in different sections of the gut of cultured and captured fish which may reflect of the environment where they were raised.
    Description: Includes:- 5 tables.;40 refs.
    Keywords: Ecology ; Aquaculture ; Nigeria ; freshwater environment ; Stomach content ; Microbiological analysis ; Microorganisms ; Cultured organisms ; Aquaculture ; Parasitic diseases
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    Fish health management: from challenge to opportunity (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23423 | 19325 | 2018-04-25 19:26:43 | 23423 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Aquatic animal diseases are the most significant constraint to the development and management of aquaculture worldwide. As aquaculture is growing rapidly and poised to help in bridging the gap in the global supply and demand of aquatic animal food products, management of health is gaining priority. There is need to improve the standards and have strict quarantine laws, this is a powerful selling point and provides our industry with a distinct competitive advantage. The basis for such legislations is very logical and simple
    Description: includes:- 2 tables;11 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Public health ; Fish diseases ; Parasitic diseases
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    Effects of salinity on larval dimension of Tilapia guineensis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23422 | 19325 | 2018-04-25 19:24:46 | 23422 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Tilapia guineensis eggs were spawned and hatched in different salinities (17, 12, 7, 5, 2 and 0) ppt. The study was conducted in eight replicates. The aim of the investigation was to ascertain disparity in hatching size of Tilapia guineensis attributable to salinity. Immediately hatching was observed, body weight of five hatchlings in each replicate was individually weighed in milligramme. The individual total length of the five hatchlings was also measured in millimeter. The height of the yolk sac larva was determined with micro-metre screw gauge graduated in millimeter from the top of the yolk sac to the dorsal region of the larva. Data obtained were used to calculate yolk sac volume. Significant differences (P〈0.01) were observed in body weight and total length of larvae hatched in different salinities. The heaviest and longest larvae were hatched in 12 ppt saline water. The yolk sac volume of larvae hatched in lower salinities were significantly higher (P〈0.01) than the yolk sac volume of larvae hatched in higher salinities. The smallest yolk sac volume was recorded in 12ppt saline water. Our findings show that salinity could be manipulated for economic production of heavier seeds of Tilapia.
    Description: Includes:- 5 tables.;6 refs.
    Keywords: Aquaculture ; Chemistry ; Tilapia guineensis ; Nigeria ; brackishwater environment ; Salinity effects ; Larvae
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    Challenges of fish farmers in Ondo State, Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23384 | 19325 | 2018-04-10 16:48:49 | 23384 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study assessed fish farmers in Ondo State, south west agro-ecological zone of Nigeria using a sample size of 100 respondents, selected through a multi-stage sampling technique. Instrument for data collection was semi-structured questionnaire. Data were analysed using frequency counts and % of the respondents. Results showed that majority (52.0%) of the respondents are middle aged, 95.0% male, 93.0% married with a higher education (45.0%). The most important fisheries technology adopted by the farmers is disease control management. 67% indicated lack of finance and high cost of fish seed (58.0%) as the most important problems encountered. It was recommended that adequate incentive and grants should be given to farmers to finance fish production.
    Description: Includes:- 1 table.;1 fig.;11 refs.
    Keywords: Aquaculture ; Nigeria ; Ondo State ; freshwater environment ; Fish culture ; Freshwater aquaculture ; Sociological aspects ; Socioeconomic aspects
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    Effects of supplemental selenium in diets of Heterobranchus longifilis (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23381 | 19325 | 2018-04-10 16:42:29 | 23381 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of selenium supplementation into diets of Heterobranchus longifilis fingerlings was investigated using a completely randomized design with triplicates in a mini-flow through experimental system. 245 fingerlings (mean wt., 1.5~c0.23g) were stocked and fed either normal (Basal) diet (Control group) or diets supplemented with 0.16, 0.24, 0.32 or 0.64 mg sodium selenite Kg-I Selenium addition to the diets and fed to the fish caused a significant increase (P〈0.05) in weight gain and fingerlings growth rate was accelerated by 18-22% compared to 17-18% in the control group. There were significant differences (P〈0.05) in survival rate between treatments, indicating that diets are likely to be responsible for increased survival rate, observed in fish fed diets supplemented with 0.24 and 0.32 mg Na2 Se03 5H2O kg-1 diet. Results indicated that a diet supplemented with, 0.24 and 0.32 mg of sodium selenite Kg-1 diet is important for growth and survival of H. longifilis fingerlings.
    Description: Includes:- 3 tables.;18 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; New Bussa ; freshwater environment ; Feeding experiments ; Experimental culture ; Nutritional requirements ; Diets ; Selenium
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    Control of reproduction in Oreochromis niloticus using pawpaw seed meal as reproduction inhibitor (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23408 | 19325 | 2018-04-12 09:01:23 | 23408 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Pawpaw (Carica papaya) seed meal (PSM) was added to a basal diet (350g crude protein and 18.5MJ gross energy lkg diet) at 0, 0.5, 1.0, 1.5 or 2.0 g/kg diets and fed to mixed-sex Oreochromis niloticus for 60 days to evaluate the effects on growth, feed conversion ratio, reproduction traits, and histology of gonads. There were no variations (P〉0.05) in growth parameters and feed conversion ratio. Indices of reproduction traits decreased with increasing dietary PSM levels. Fish fed with the basal diet had higher and better indices of reproduction traits (P〈0.05) than the fish fed with PSM diets. Fish fed O.0g PSMlkg diet showed normal testicular and ovarian tissues, and no lesions were observed. Fish fed O.5g PSMlkg diet showed slight increase in interstitial cells in testes. Fish fed 1.0g PSMlkg diet showed swollen spermatids nuclei, increased interstitial cells and focal necrosis in testes; and hydropic degeneration, ruptured follicles, granulomatous inflammation in the insterstitium and necrosis in ovaries. Fish fed 1.5g PSMlkg diet exhibited atrophy of seminiferous tubules in testes. Fish fed 2.0g PSMlkg diet, there was disintegration of spermatids and necrosis in testes and severe atretic follicles in ovaries. Reproduction traits and histological observations of gonads in O. niloticus fed high dietary PSM levels revealed that pawpaw seeds may be effective as a reproduction inhibitor in O. niloticus.
    Description: Includes:- 4 tables.;23 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; freshwater environment ; Feeding experiments ; Experimental culture ; Nutritional requirements ; Fish culture
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    Potentials of poultry offals in African catfish diets (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23407 | 19325 | 2018-04-12 09:00:06 | 23407 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A 70-day feeding trial was conducted to test the effect of partial replacement of fishmeal by poultry offal in African catfish Clarias gariepinus diets. Four isonitrogenous ration containing various levels (0%, control), 30%, 60% and 90% of poultry offal were fed to three replicate groups of C.gariepinus fingerlings with a mean initial weight of 0.74~c 0.15 g. 10 fish/plastic bowl were tested in 15 I capacity plastic bowl. Mean weight gain of the fingerlings fed the control were higher (2.43~c 0.12g) compared to fish fed 30%, 60% and 90% poultry offal inclusion of Hsh meal (1.99~c 0.08g, 1.84~c0.06g and 1.14~c 0.20g, respectively), but there was no significance difference (P~〈 0.05) in weight gain of fish. There was no significant variation in feed conversion ratios which varied between 0.46~c 0.12 and 0.53~c 0.20 for the control and 90% poultry offal respectively, obtained among the groups. Similarly, specific growth rate and protein efficiency ratio decreased as the level of poultry offal increased in the diet. It was concluded that the replacement of fish meal with chicken offal meal diet at 30% level will enhance growth performance of Clarias gariepinus
    Description: Includes:-4 tables.;9 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Ibadan ; freshwater environment ; Feeding experiments ; Experimental culture ; Feed preparation ; Nutritional requirements ; Fish culture
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    Design and construction of electronic security system for aquaculture water-recirculatory system (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23414 | 19325 | 2018-04-12 09:08:55 | 23414 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Electronic play a vital role in providing security. A security alarm system was designed and constructed to safeguard aquaculture water recirculatory system against illegal entry. The system involved a laser touch which is easily available and it is used for the operation of the device. The laser beam is directed across the entrance to the water recirculatory system, falling on a light dependent resistor (L.D.R). Any unwanted interruption of the laser beam would result into energization of the alarm and indicating security danger. A prototype water recirculatory system was constructed and interfaced with the devices and the device was found efficient and reliable.
    Description: Includes:- 2 tables;1 fig.;4 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Electronic equipment ; Security ; Defence craft ; Fish culture
    Repository Name: AquaDocs
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    Preliminary studies on the culture of Atya crassa in outdoor and indoor tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23415 | 19325 | 2018-04-09 17:38:44 | 23415 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A. crassa of sizes ranging 7.05~c 0.13g to 8.5~c 0.05g were purchased from fishermen around the Jebba Lake. They were transported in open jerry cans in a cold van for about two hours. The indoor tanks measured 3m x 2m x 1.5m while the out door tanks were 2m x 2m x 1.5m. The indoor tanks were stocked 17 prawns per tank while the outdoor tanks were stocked 10 prawns per tank. The experimental diets were formulated with crude protein levels 30%, 35% and 40%. The ingredients used were fishmeal, palm kernel cake, guinea corn, starch, calcium carbonate and these were fortified with premixes. Each diet was assigned to two tanks each indoors and outdoors. They were fed twice daily (9hrs and 19hrs) for 184 days. Positive growth was observed in both indoor and outdoor tanks. There was no significant difference in the growth of prawns fed outdoor (P〉0.05). There was significant difference in the growth parameters of prawns fed the varying diets indoors. The percentage survival of prawns was higher outdoors and there was no significant difference (P〉0.05) in the survival recorded in the three treatments. There was significant difference (P〈0.05) in the survival of prawns in indoor tanks. The carcass composition of A. crassa fed the three diets show crude protein lower at harvest than the prawns stocked initially. Percentage lipid, ash and fibre of the harvested prawns were higher than at initial stocking. A. crassa is cultivable in freshwater and it should be reared with 30% crude protein diet in outdoor systems. Attempts should be made in the larval rearing of the species.
    Description: Includes:- 3 tables.;1 fig.;14 refss.
    Keywords: Aquaculture ; Atya crassa ; Nigeria ; Jebba L. ; freshwater environment ; Feeding experiments ; Experimental culture ; Feed efficiency ; Nutritional requirements ; Shrimp culture
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    Appraising three (3) decades of aquacultural development in Imo state (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23420 | 19325 | 2018-04-25 19:21:06 | 23420 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: A survey was carried out to appraise the level of aquacultural development in the last 30 years in Imo State, South eastern, Nigeria. The study was conducted by the use of questionnaires and visits to fish farms in all the three senatorial zones of the State namely; Okigwe, Orlu and Owerri. Data collected revealed that 79.49% of the farms were owned by individuals while values of 12.82%, 5.13% and 2.56% represents government, community and cooperative ownership respectively. However, 17.95% of ponds were established between 1978-1988 while 46.15% represents fish ponds established between years 1998-2008 . Earthen ponds were commonest with pond areas varying between 400-10,000m2.
    Description: includes:- 8 tables.;6 refs.
    Keywords: Aquaculture ; Nigeria ; Imo state ; freshwater environment ; Aquaculture development ; Fish culture
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    Economics of trickling biological periwinkle shell filter for closed recirculating system (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23417 | 19325 | 2018-04-25 19:14:49 | 23417 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Studies on the economics of trickling biological periwinkle shells filter for closed recirculating catfish system was carried out at the University of Science and Technology, Port Harcourt, Nigeria for 12 weeks. The periwinkle shells biofilter and other recirculating aquaculture system (RAS) components were designed and set up for a pilot catfish production using Clarias gariepinus juveniles at the stocking density of 400 fish/m3. Using fish holding tank volume of 0.21m3, biofilter volume of 1m3, sedimentation tank volume and flow rate of 4.20m3 and 0.78m3/hr respectively, lift pump flow rate of 2.10m3/hr, and an annual production of 3 tons of catfish, a record of all financial expenditures was kept. The financial analyses of the system with periwinkle shells filter and that of imported plastic filter block of same size were prepared. The discounted cash flow projections for the two systems were also prepared. From the discounted cash flows, the economic viability indices for the two systems were computed. The economic analysis compared the profitability index of 1.45 and the payback period of 2.50 years for the system with periwinkle shells filter to the profitability index of 0.60 and payback period of 5.90 years for the imported plastic filter block, and concluded that the system with periwinkle shell filter was cheaper and more cost effective
    Description: Includes:- 5 tables.;10 refs.
    Keywords: Aquaculture ; Nigeria ; Port Harcourt ; Recirculatory aquaculture system ; freshwater environment ; Fish culture ; Cost analysis
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    Effects of length of delay after slaughter (Lodas) on raw catfish Clarias gariepinus (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23418 | 19325 | 2018-04-25 19:17:12 | 23418 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The effect of delay after slaughter on microbial quality, proximate composition and sensory scores of raw catfish, Clarias gariepinus was evaluated. A total of 52 live catfish (average weight 700.0~c7.0g) were used for the experiment. Ten freshly slaughtered fish samples each were selected for organoleptic assessment at 0, 4, 8 and 12 hours post-slaughter, while three fish samples each were selected for chemical and microbial analyses. Microbial load on fish samples increased significantly (P〈 0.05) with increase in length of delay after slaughter, LODAS. Bacteria isolated included Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Bacillus spp and Staphylococcus aureus. Percent protein and ash contents of fish samples increased with increasing LODAS, while moisture content decreased and lipid was not affected. It was observed that raw C. gariepinus retained most of its physical attributes up to 4 hours post-slaughter. These quality attributes except colour and odour of gills, deteriorated significantly (P 〈 0.05) at every successive four-hour post-slaughter interval. Significant negative correlation existed between LODAS and sensory quality of raw fish (eyes, r = -0.966, P 〈 0.05; gills, r = -0.980, P 〈 0.05; skin, r = -0.998, P 〈 0.01; and odour, r = -0.994, P 〈 0.01). This study established that quality of raw C. gariepinus deteriorated with increasing LODAS and that raw C. gariepinus was not totally unacceptable when delayed for 12 hours after slaughter at ambient temperatures.
    Description: Includes:- 5 tables.;17 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Lagos ; Proximate composition ; freshwater environment ; Organoleptic properties ; Fish spoilage ; Microbiological analysis ; Microbial contamination
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    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
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    Growth response and survival of Heterobranchus longifilis cultured at different water levels in outdoor concrete tanks: implications for culture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23425 | 19325 | 2018-04-25 19:31:54 | 23425 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Thirteen-day-old hatchery-raised fry obtained from hormonally-induced spawns of mature African catfish H. longifilis broodstock were introduced to three different water levels (0.35, 0.50 and 0.65 m) in four replicates in 12 units of 2x2x1m3 outdoor concrete tanks. The fry were similarly stocked initially at 50 fry/m2 and later thinned down to 5 fish/m2 and cultured for 6 months. Fish were fed twice daily with commercial pellet feeds (Coppens?) while adjusting the feeding rate from 10 to 4% body weight and pellet size from 0.2 to 4.5 mm. The effects of pond water levels were evaluated in growth responses and survival. Water quality variables were similar (p 〉 0.05) in all compartments. Temperature, dissolved oxygen and pH were at the optimum level for fish. The results reveal significant (P 〈 0.05) treatment effects on growth performances. Fish kept at the highest pond water depth (0.65m) were heavier (P 〈 0.05) and had a higher specific growth rate (P 〈 0.001) than the others. Food conversion ratio and survival rate were unaffected by the experimental treatments. ANOVA revealed significant differences (P〈0.05) with culture period. The lowest water depth (0.35 m) favoured fish growth in the first 3 months while the highest water depth (0.65 m) favoured fish growth from the fourth month upwards (P〈0.05). These results are important because they indicate the optimum water depths for the culture of H. longifilis from fry to sub-adult and from the grow-out/fattening of sub-adult to adult, respectively, in outdoor concrete tanks.
    Description: Includes:- 3 figs.;35 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Abia State ; freshwater environment ; Fish culture ; Survival ; Feeding experiments
    Repository Name: AquaDocs
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    Fish hatchery survey in Borno State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23428 | 19325 | 2018-05-02 08:04:53 | 23428 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Aquaculture is regarded as being uniquely placed to reverse declining supplies from capture fisheries and for this to be realized, fish hatchery has a notable role to play. Fish hatchery is the bedrock upon which true and sustainable fish farming can be built. A field survey was conducted in the 3 geo-political zones of the State to look into the number and functionality of fish hatcheries. Results showed that there were about 23 fish hatcheries in the State with the majority concentrated in Maiduguri metropolis. Private ownership (79%) dominated of which 84% were functional. Average annual production is less than 10,000 fingerlings in most hatcheries while the wild sourced fingerlings were used as alternative by the majority. Most hatcheries (62%) made use of concrete tanks for breeding and nursery. All the respondents were of the opinion that the level of patronage was encouraging, though agreed that the level of aquaculture development in the State was low. However, few among the respondents said aquaculture development in the State is on the increase due to low productivity of natural water bodies for the past 10 years. Recommendations were made on how to improve hatchery operation that could help to boost aquaculture development in the State
    Description: Includes:- 3 tables.;3 figs.;5 refs.
    Keywords: Aquaculture ; Nigeria ; Borno State ; Hatchery management ; freshwater environment ; Fish culture ; Freshwater aquaculture
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    Suitability and potentials of organic aquaculture production in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23430 | 19325 | 2018-05-02 08:06:54 | 23430 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Organic agriculture is a food production system that strives to sustain the health of soils, ecosystems and people; and can be employed to mitigate climate change effects which contribute to lowering fisheries productivity worldwide. In many developing countries organic agriculture practice has impacted positively on food security and rural livelihoods, particularly in fisheries management and aquaculture, hence the present advocacy for organic aquaculture practice in Nigeria.
    Description: Includes:- 15 refs.
    Keywords: Aquaculture ; Nigeria ; freshwater environment ; Aquaculture ; Aquaculture development
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    Prospects and problems of aquaculture in Borno State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23429 | 19325 | 2018-05-02 08:05:56 | 23429 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Borno State has a great potential for fish production from the culture and capture fisheries, regrettably the potential for the former is still yet untapped despite low productivity of large rivers and lakes that are already over-exploited. Aquaculture has the potential to help expand the resource base and reduce the pressure on capture fisheries, generating employment, foreign exchange and elevating socio-economic of the farmers. This paper therefore, reviewed the prospects and major problems of aquaculture in the state with a view to fortify interest on fish farming.
    Description: Includes:- 5 refs.
    Keywords: Aquaculture ; Nigeria ; Borno Sate ; freshwater environment ; Aquaculture ; Aquaculture development
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    Effect of imported feed and local feed on growth performance of tilapia (Oreochromis niloticus) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24170 | 19325 | 2018-05-13 18:50:52 | 24170 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A number of 60 Juveniles of Oreochromis niloticus were stocked and divided into two plastic ponds of 0.90m by 0.60 in dimension respectively with initial total weight of 120g.The juveniles were two months and half old as at the time of collection and they were fed with 4mm of the feeds. Each pond contains thirty Oreochomis niloticus which were fed with local feeds, and coppens feed. After weighing the fishes in the two ponds, there was significant difference in the average weight and length, in which the pond that was fed with coppens has the highest average weight and length of 140g and 15.62cm respectively. The quality of the water was checked by measuring pH, dissolved oxygen and temperature of the water using water aquaculture kit. Model: FF-1 A.CAT No. 2430-0. The mortality rate was 0%, while the survivability rate was 100%.
    Description: Includes: 2 tables.;Also includes: 5 references.
    Keywords: Aquaculture ; Ecology ; Oreochromis niloticus ; Nigeria ; Lagos ; freshwater environment ; Feed ; Freshwater fish ; Growth rate ; Length-weight relationships ; Pond culture ; Water quality ; Artificial feeding ; Feeding experiments ; Fish culture ; Survival ; Mortality
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    Design of pumping station for a tidal fish farm in Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24173 | 19325 | 2018-05-13 18:55:18 | 24173 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The design of pumping station for submersible FLYGT pump 3102 version LL to redress the water supply problem of some ponds in the tidal fish farm of African Regional Aquaculture Centre (ARAC) located in Omuihuechi, Aluu, Rivers State, Nigeria was carried out. Prior to the design baseline study was carried out for the proper sitting of the pumping station. The topographic survey of the area indicated gentle sloping woodland, with the highest and lowest elevations of 11.00 m and 1.00 m respectively. The mean peak heights of water in the supply canal during spring and neap tides ranged from 0.95 to 1.45 m and 0.38 to 0.86 m respectively. The flood tide and ebb tide velocities of supply canal water flow varied from 0.40 to 0.75 m/s and 0.75 to 0.92 m/s respectively. Soil particle size analysis indicated loamy clay and clay soils. The results of pumping station design were 1.80 m (length), 1.30 m (width); 3.60 m (height),0.15 m (thickness), I (cement) : 2 (sand) : 4 (gravel) (concrete mixture ratio) and 12 mm (reinforcement bar). Results of pump characteristic calculation were 0.069 m〈sup〉3〈/sup〉/s (discharge) ,4.02 m/s (pumping velocity), 5.73 m (total dynamic head), 0.82 m (minimum submergence depth), 5.04 KW (pump power)and 0.40 and 0.30 m ( clearances from floor and wall respectively). The results obtained were considered adequate for the purpose of construction of the pumping station for the pump and the procedures adopted will assist in similar design tasks in the development of fish farms in the Niger Delta Region of Nigeria and beyond.
    Description: Includes: 4 tables and 4 figures.;Also includes: 20 references.
    Keywords: Aquaculture ; Limnology ; Nigeria ; Niger Delta ; freshwater environment ; Fish culture ; Pump stations ; Tidal inlets ; Fish ponds ; Construction ; Construction materials ; Design ; Topography ; Soils ; Water pumps ; Aquaculture equipment
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    The use of hapa as an improved system for culturing of Clarias gariepinus fry (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24176 | 19325 | 2018-05-13 18:59:45 | 24176 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fry management in aerated and non aerated aquarium and hapa system were determined in Fish Hatchery of Faculty of Agriculture, Shabu Lafia to assess condition factor, percentage survival rate, total body length and percentage weight gain. 200 hatchlings of Clarias.gariepinus fry were put into a 35 x 30 x 15cm aquarium with aerator and without aerator; hapa with aerator and hapa without aerator in 3 replicates. The hapas were made of brown colour plankton net. The fry were fed with 5% of their body weight with Artemia shell free four times daily for the period of sixteen days. Temperature(27.45 ~c 0.05~'C), pH (7.56 ~c 0.03); Dissolved oxygen (8.20 ~c 0.03 mg/L), total alkalinity (l5.36~c 0.03 mg/L) and Free carbon dioxide (4.30 ~c 0.03 mg/L) monitored in each of water quality parameter of the various treatments was not significantly different from each other. The Percentage weight gain (1117 and 1067), percentage survival rate (92.83 and 91.33), total body length(l.07 and 1.07cm) and condition factor (11.99 and 11.44) of C. gariepinus fry in hapa system (aerated and non aerated respectively) are significantly(p〈0.05) higher than those of aquarium in the study although they are not significantly different (P〉0.05) from each other. The use of hapa as an improved system for mass production of C. gariepinus fry is highly recommendable in the large body of water.
    Description: Includes: 1 table and 4 figure.;Also include: 7 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Nasarawa State ; Aquarium ; Aerator ; Fry ; Hatchlings ; Hapa ; Hapa ; freshwater environment ; Fish culture ; Freshwater fish ; Fry ; Hatcheries ; Condition factor ; Survival ; Length-weight relationships ; Aquaculture techniques ; Comparative studies ; Cage culture
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    Aquaponics: a new trend in food production (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24175 | 19325 | 2018-05-13 18:58:18 | 24175 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The increase in population coupled with current and escalating extent of soil degradation, water scarcity and climate-related challenges plaguing agricultural productivity in every corner of the world and particularly in Nigeria demands for alternative food techniques, one of them called aquaponics. This paper highlights a new trend in food production techniques for the production of fish and vegetable crops in aquaponics. Aquaponics is experiencing renewed interest worldwide with many small home growers and large operations employing the process as a means of producing sustainable fish and plant crops. The design of this scalable farming system closely mirrors that of recirculating systems in general, with the addition of a hydroponic component and the possible elimination of a separate biofilter and devices for removing fine and dissolved solids. The benefits of aquaponics includes conservation of water resources and plant nutrients, intensive production of fish and reduced operating costs relative to either system in isolation. Aquaponics, without doubt is a practice that is receiving considerable interest due to an ever increasing need for fresh wholesome food and sustainable eco-friendly agricultural practices.
    Description: Includes: 3 figures.;Also includes: 12 references.
    Keywords: Aquaculture ; Nigeria ; Ibadan ; Aquaculture ; Hydroponics ; Recirculating system ; Sustainable ecosystem ; Natural fertilizer ; Aquaponics ; freshwater environment ; Plant culture ; Sustainable development ; Environmental impact ; Food security ; Aquaculture development ; Organic fertilizers ; Recirculating systems ; Agropisciculture ; Water resources ; Conservation ; Aquaculture techniques ; Fish culture
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    The status of fish genetics and breeding towards sustainable aquaculture in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24202 | 19325 | 2018-05-16 15:26:01 | 24202 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper, fish genetics and breeding in Nigeria addresses the application of genetics and breeding to fish farming with the view to enhanced aquaculture production in Nigeria. This production technique is not limited to the use of conventional breeding programs nor is it necessary to go through the basic developmental steps of selection and isolation that lead to the domestication and diversification of livestock and crops over thousands of years. With modern molecular genetic techniques and induced breeding, it is now possible to develop and create new fish species .
    Description: Includes: 12 references
    Keywords: Aquaculture ; Nigeria ; Delta State ; freshwater environment ; Genetics ; Sustainability ; Induced breeding ; Biotechnology ; Seed (aquaculture) ; Aquaculture techniques ; Fish culture
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    The role of biotechnology in aquaculture and fisheries development (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24204 | 19325 | 2018-05-16 15:29:46 | 24204 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Biotechnology per se is not a panacea for the world's problems of hunger and poverty. However, genetic engineering in particular, offers outstanding potentials to increase the efficiency of animal improvement. Thus, biotechnology could enhance global food production and availability in a sustainable way. Case studies from Egypt and India also demonstrate that highly immune genetically modified fishes, transgenic fishes, chromosome engineering and gene banking are very appropriate for fish farmers and consumers in developing countries. As the entire technology can be packaged into the germ cells of fish, it can easily be integrated into traditional small-holder fish farming systems. Except for a few innovative transfer projects, though, the application of biotechnology until now remains concentrated in the industrialized world. Combined with insufficient own scientific and regulatory capacities, the increasing privatization of international aquacultural and fisheries research and the strengthening of intellectual property rights complicate the access of developing countries to biotechnology. Profound constitutional adjustments are therefore essential to ensure that biotechnology does not bypass the poor.
    Description: Includes: 15 references.
    Keywords: Aquaculture ; Fisheries ; Nigeria ; Ebonyi State ; freshwater environment ; Biotechnology ; Sustainability ; Genetically modified organisms ; Gene banks ; Fish culture ; Aquaculture development ; Food security
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    Effects of biofouling on shellfish aquaculture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24205 | 19325 | 2018-05-16 15:31:07 | 24205 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The culture of oysters, clams, scallops, and other molluscs is collectively one of the fastest growing sectors of the aquaculture industry. An inherent issue with shellfish culture methods, particularly for off-bottom culture (i.e. floating trays, racks, long lines, strings, rafts), is biofouling. This can occur directly, by biofouling of the animals themselves, or indirectly, by fouling of cages, nets, filters, and other equipment. Problematic biofouling species have been identified and segmented into six groups: algae, barnacles, mussels, tubeworms, ascidians and hydroids. Controlling and mitigating biofouling can result in significant costs for commercial shellfish culture operations.
    Description: Includes: 1 table and 1 figure.;Also includes: 14 references.
    Keywords: Aquaculture ; Engineering ; Algae ; Barnacles ; Mussels ; Tubeworm ; Ascidians ; Hydroids ; Nigeria ; Port Harcourt ; Epibiosis ; Filter feeding ; Competition for food ; Aquatic invaders ; Marketability ; brackishwater environment ; Fouling ; Shellfish culture ; Methodology ; Off-bottom culture ; Cages ; Nets ; Filters ; Comparative studies ; Fouling organisms ; Fouling control
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    Nutrient and pH stability in liquid manure production and usage for pond fertilization (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24236 | 19325 | 2018-05-20 05:22:21 | 24236 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Nutrient content of organic manure vary according to the composition which determines the fertility and efficiency. The effectiveness of liquid manure depends on the N.P.K value of the manure source. One kilogram of each manure source was weighed and loaded into a polyethylene bag for ten (10) days anaerobic fermentation. pH was monitored for five consecutive days after the second day using Digital pH meter (Model PHeP NOVO Illkirch Cedex France) with values ranging between 5.6-6.3 and 5.7-6.9 for both liquid manures slurry. The liquid manure was produced from Pig and Poultry manure slurry with N.P.K values range between 4.80-5.96, 4.10-4.66,0.47-0.80 and 7.50-8.80, 3.25-5.60, 0.79-0.85 for Pig and poultry manures respectively. Organic manure loose nitrogen when exposed to extreme temperature due to volatilization of NH3. Therefore, in liquid manure production, anaerobic fermentation enhances nutrient stability through immobilization of ammonia-nitrogen compounds. The interaction of N.P.K and pH shows the availability, stability and quality of nutrient in the liquid manure produced. Anaerobic fermentation produces better quality liquid manure than the manure due to immobilization of ammonia nitrogen. Both liquid manure had positive correlation (R2) of 0.6977 and (R2) of 0.2370 for Poultry and Pig liquid manure. Liquid manure application in ponds can reduce cost of pond fertilization especially in the integrated fish farming system than the use of organic manure directly serving as a better means of pond fertilization and pollution control in the farm environment under a stressed economy.
    Description: Includes: 14 references.
    Keywords: Aquaculture ; Nigeria ; Enugu ; Anaerobic fermentation ; Organic slurry ; liquid manure production ; freshwater environment ; Nutrients (mineral) ; pH ; Stability ; Fish ponds ; Fermentation ; Anaerobic bacteria ; Fish culture ; Freshwater aquaculture ; Pond culture ; Manure ; Organic fertilizers
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    Toxicity of unripe Ackee apple (Blighiasapida) fruit extract on Clarias gariepinus fingerlings (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24201 | 19325 | 2018-05-16 15:24:45 | 24201 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to determine the toxicity of unripe Ackee apple (Blighiasapida) fruit extract on catfish, Clarias gariepinus fingerlings using the 96-hour bioassay under laboratory condition. The LC50 was determined graphically as 3.00ppt. Mean mortality was 0, 40, 50, 70 and 80% in the concentrations of 0, 3.33, 3.47,3.60 and 3.73ppt. Statistical analysis of the results showed that there were significant differences (P〈0.05) on the effect of concentration. Mortality increased with increase in concentration of toxicant and duration of exposure. Clarias gariepinus showed erratic swimming pattern, loss of reflex which increased with increase in concentration. Histopathological changes were revealed in the gills, skin and heart of the fish. The gill structure was altered and there were moderate mucosal erosion. There were several lymphoid aggregations with fibrous connective tissue at the dermal and epidermal areas in the skin. The heart myofibre were diffusely disintegrated with edema between bundles.
    Description: Includes: 1 table and 7 plates.;Also includes: 8 references.
    Keywords: Health ; Aquaculture ; Clarias gariepinus ; Nigeria ; Ado-Ekiti ; Fruit Extract ; freshwater environment ; Toxicity ; Artificial feeding ; Food composition ; Chemical composition ; Histopathology ; Freshwater fish ; Fingerlings ; Toxicants ; Mortality ; Fish culture ; Controlled conditions ; Lethal limits
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    Technology for the culture of marine fish species: prospects and implementation in Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24598 | 19325 | 2018-05-21 12:11:03 | 24598 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Greater proportion of the much needed rich animal protein and other essential nutrients for man's prolonged well-being, globally, is derived from fish. Three considered factors in production model for such aquaculture project include: the technology, suitable site for location of envisaged set up and market. While concerned and interested stakeholders can bring together the intelligentsia for such venture, the government can provide enabling environment, Noting that the adopted technology will consist of hardware (equipment and structures) and software (relevant human resource and globally accepted procedures), technology for the production of marine fish species can be assembled in Nigeria since there are engineers of various disciplines, fisheries researchers, fish farmers, hatchery operators, technologists, technicians, numerous marine and brackish water shell and finfishes and several kilometres of coastal area. There are industries that can fabricate various aspects of the facilities and equipment knowing fully well that corrosion free and non-toxic materials are a must for fish breeding operations. The challenge for regular power supply can be overcome by turning to alternative energy sources such as solar energy, or from sources such as gas, wind, or water, these being abundant in Nigeria. The first step in efforts to establish technology for the culture of marine fish in Nigeria and boost production in the face of dwindling production from the wild should be a review of literature and spirited efforts to adapt such for the nation. This paper focuses on success made so far in the culture of marine fish species in some parts of the world, and necessary steps to ensure their establishment in Nigeria.
    Description: Includes: 21 references.
    Keywords: Aquaculture ; Nigeria ; Marine fish culture and technology ; Prospect ; marine environment ; automation
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    Identification, distribution and prevalence of ecto-parasites associated with cultured fish in Ogun State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24597 | 19325 | 2018-05-21 12:09:36 | 24597 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Public health issues can he considered as those of direct importance to both producers and consumers of fish and include broader issues of food production, processing and delivery systems. As aquaculture assumes an expanding role in meeting consumer demands for fish and fishery products, it is natural that they meet safety and quality standards. Aquaculture is a growing industry in Nigeria and it has assumed commercial importance activity. This study was part of the project on epizootiological survey of pathogenic diseases of cultured fish species and is aimed at identifying ecto-parasite associated with cultured fish in Ogun State, Nigeria. The study which was carried out in 2012 covered fifty fish farm, spread across the three senatorial zones. Five pieces of fish were randomly picked from each farm surveyed. Participants observation and structured questionnaires were administered to fish farmers in order to gather information on source of fries, fish feeding and feed type, use of manure and its type, pond type, stocking density, pond hygiene, water source, frequency of changing water and history of diseases and mortalities of fish. Before the fish samples were collected, pond size and physicochemical water quality were assessed. Water test kits were used to measure parameters like iron, nitrate, alkalinity and ammonia. All the procedures for physicochemical water quality parameter analysis was done according to the manufacturer's instructions. Water pH was measured using a probe while dissolved oxygen and both water as well as air temperature were measured by using Hanna kit. All types of farms are included in the survey such as hatcheries, brood stock farms as well as grow out farms. The study revealed the spread of parasites across the senatorial zones. The most common encountered parasites were Trichodina sp, Gyrodactylus sp, Dactylogyrus sp and trematodes. The intensity of the parasites differed markedly.
    Description: Includes: 21 references.
    Keywords: Aquaculture ; Nigeria ; Distribution ; Prevalence ; Cultured fish ; Epizootiological survey ; Ecto-parasites. ; freshwater environment ; automation
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    Status of fish farming in Rivers State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24593 | 19325 | 2018-05-20 16:09:32 | 24593 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study surveyed the status of fish farming in Rivers State of Nigeria. Structured interview schedule questionnaires were used in sourcing information from 90 fish farmers randomly selected from nine local government area, with three local government each drawn from each agricultural zone of the state. Data obtained were analyzed using descriptive statistics. The findings revealed that majority (34.4%) of the fish farmers were male and between the age range of 41-50 years. 31.1% of fish farmers cultured their fish in concrete fish tanks. The total mean annual production of fishes were 41,000 metric tons, 38.9% of fish farmers practiced integrated fish farming, 72.2% of the farmers practice only fish production; 58.9% of farmers sourced their information from friends/fellow farmers. In terms of water supply, 40.0% of farmers sourced their water supply from borehole, 36.6% use tilapia species as their fingerlings, 38.9% of farmers sourced their fingerlings from government hatchery 15.2% of farmers indicated that they suffer loss of tilapia, 54.4% farmers use partial harvest, 92.6% of farmers indicated irregular electricity supply as a major constraints to fish production. In order to facilitate the efficient operation of fish farming in the study area, technical advice on pond construction and preparation, species selection and supply for stocking purposes and collection of relevant data on aquaculture will help in the improvement of fish farming in the study area.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Nigeria ; Rivers state ; Aquaculture ; Fish ; Rivers State ; freshwater environment ; automation
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    Gender and age blood parameters references in African catfish (Clarias gariepinus) cultured in earthen ponds during dry season in Ibadan metropolis, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24580 | 19325 | 2018-05-20 06:01:18 | 24580 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Blood analysis is important in fish health investigation and may be influenced by intrinsic and extrinsic factors. However difficulties exist in the use of blood analysis in the investigation of fish health due to the paucity of species specific, gender and age based reliable references. The current study therefore aims to determine some blood parameters in order to provide reliable references for dry season of the normal condition values of C. gariepinus, a widely cultured fish in Nigeria. This study involved random sampling of 900 C. gariepinus aged 4, 5 and 6 months from earthen pond for three years. Data obtained for blood parameters using standard method were analyzed using descriptive statistic, students'-test, one-way ANOVA level of significant set at p ~,0.05. Results showed the female had significantly (p ~,0.001) higher values than the males for each age bracket and the values increased sig nificantly (p 0~,.05) with increased in PCV. hemoglobin, RBC, WBC, total protein, potassium, sodium, Creatinine, ALT, AST and glucose. The females and males values at 4, 5 and 6 months old were PCV (32.14 ~c 0.19% vs 26.72 ~c 1.l2; 36.45 ~c 1.39% vs 32.33 ~c 1.46%; 40.83 ~c 0. 73% vs 35.01 ~c 0.08%.), total protein (3.98 ~c 0.16g/l vs 3.49 ~c 0.18g/l; 4.45 ~c 0.10g/l vs 4.33 ~c 0.04g/l). Lymphocytes, neutrophils, mono cytes and ESR values showed no stable trend in gender differences with increased age. In both the females and the males, lymphocytes decreased significantly (p ~,0.05) while neutrophils and monocytes increased significantly (p~,0.05) with increased age. ESR decreased significantly (P~, 0.05) in the males and non-significantly in the females with increase in age. It is hoped that these values obtained would serve as a reliable reference to enhance an appropriate intervention in the culture of C. gariepinus aged 4. 5 and 6 months in earthen pond which may be extrapolated for use in other culture systems.
    Description: Includes: 48 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Clarias gariepinus ; Gender ; Blood parameters ; Earthen pond ; Culture ; freshwater environment ; automation
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    Construction and application of green house techniques for aquaculture practice in the arid zone of Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24582 | 19325 | 2018-05-20 15:54:40 | 24582 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: An experimental greenhouse was constructed at the fish pond site of the Federal College of Freshwater Fisheries Technology, Baga using the freestanding design style. Air temperature, water temperature and evaporation readings were observed for two weeks. Temperature records in the green house ranged between 25-27~'C at 6am and 26-32~'C at 6pm while atmospheric temperature was observed between 22-25~'C at 6am and 24-28~'C at 6pm respectively. Evaporation rates were observed to be higher in the water trough placed outside than the one placed inside the greenhouse. Water depth dropped from 39.5cm to 34.5cm (i.e 9cm) and 39.5cm to 30.5cm (5cm) in the trough placed outside and inside the greenhouse respectively. From this experiment, water is connserved as a result of low evaporation rate and higher water temperatures are attainable in the greenhouse which is desirable in the extremely cold harmattan season in the arid zone of Nigeria.
    Description: Includes: 10 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Nigeria ; Aquaculture ; Greenhouse technique ; Arid zone ; freshwater environment ; automation
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    Climate change: impacts and threats on freshwater aquaculture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24583 | 19325 | 2018-05-20 15:55:56 | 24583 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper examines the major effects of climate charge on aquaculture, especially on the freshwater ecosytem. Aquaculture as established is not practiced evenly across the world. Therefore, the paper highlights the current aquaculture practices within the regions and across the different environments to ascertain the major effects of climate variations on the freshwater ecosystem and aquaculture practices in particular. The main elements of climate change that would impact on aquaculture produ ction, such as sea level and temperature rise, changes in monsoon patterns and extreme climatic events and water stress, among others were properly looked at and the reasons for their effects addressed. The different elements of climate change that are experienced in varying degrees can be either positive or negative or directly or indirectly, depending on the different culture systems that are practiced. It is in the process of our study that we brought out the complex attributes of climate change as it affects aquaculture productivity and the possible roles that the society can play to ameliorate the harsh effects of this ugly monstet; referred to as ”climate change and the consequent global warming trends.
    Description: Includes: 17 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Nigeria ; Climate change ; Freshwater ; Aquaculture ; freshwater environment ; automation
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    Sealing capacity of different materials for the reclamation of cracked concrete fish tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24585 | 19325 | 2018-05-20 15:58:45 | 24585 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The sealing capacity of latex sealant and Portland cement for the reclamatiOn of cracked concrete fish tanks was investigated for a period of three months. Concrete fish tanks (5m x 5m x lm) were divided into duplicate treatments (T1 and T2). The latex sealant was utilized in treatment 1 (T1) while Portland cement was utilized in treatment 2 (T2). The tanks were initially filled with water and the seepage rates were determined within five days and results showed that the rate of seepage was very high which led to the abandonment of the tanks. The surfaces of the tanks were cleaned thoroughly before the application of the sealant and cement. In Tl, the sealant was mixed in a ratio of 1:4:7 (sealant: water: cement) and applied with brush in two layers before the mortar was finally applied. The Portland cement was also mixed in a ratio of 1:3 (cement: plaster sand) and applied on the other two tanks in T2. The tanks were filled with water after curing for one week. The seepage rate determined in Tl was 4mm per day when the weather was clear (sunny) which may be as a result of water loss by evaporation while the seepage rate determined in T2 shows a continuous decrease of 12mm every 24 hours, irrespective of weather condition.
    Keywords: Aquaculture ; Nigeria ; Sealant ; Concrete tank ; Seepage ; Portland cement ; freshwater environment ; automation
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    Survey of functional and non-functional fish hatchery in Jigawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24589 | 19325 | 2018-05-20 16:04:34 | 24589 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted in the five emirate zones of Jigawa. The number of functional and non-functional fish hatcheries were investigated in the state. The results showed that there were 35 fish hatcheries in the state, and private ownership (57.14%) dominate the government ownership (42.16% ), all with less than 1000,000 fingerlings production annually. The study also indicate that out of the 35 fish hatcheries, 15 were found to be functional in operation and 20 are found existing but not functional in operation. Based on the field survey, all the respondent are of the opinion that the level of production and number of functional hatcheries in the state are low. Recommendations were made on how to improve hatchery operation that could help to boost aquaculture development in the state.
    Description: Includes: 7 references.
    Keywords: Aquaculture ; Nigeria ; Jigawa ; Fish hatchery ; Functional ; Non-functional ; freshwater environment ; automation
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    The design and construction of a fish-tank cage: transforming cage culture in a flooding world (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24588 | 19325 | 2018-05-20 16:03:10 | 24588 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Fish tank cage was designed and constructed as an ingenious innovation to boost cage culture and transform aquaculture in Nigeria and beyond. It consists of two major components. The first is a black 500 litre capacity plastic water storage tank which was perforated profusely (840 meshes/m2 on the body and 256 meshes/m2 at the bottom) to fashion out a meshed tank. The circular meshes on the body have a diameter of 12mm, and that of the bottom 8mm. The dead weight of the tank with cover and lock is 12.7kg. The height above ground is 104cm and circumference at the middle is 270cm, the thickness is 0.5cm. The second component is a 6 inches diameter PVC square ring, sealed to serve as an air tight device for buoyancy. Suspension rods passed through hangers on the tank cage were used to suspend the tank cage in the middle of the suspension ring. The tank cage has the properties of a good cage-durability, easy waterflow through, non-toxic predator proof and flood resistant. It can be used as a floating or submerged cage. It can hold up to 300 adult fishes. However, the stocking capacity for intensive farming will be determined by field trials.
    Description: Includes: 6 references.
    Keywords: Aquaculture ; Nigeria ; Fish tank gate ; Cage culture ; Aquaculture ; freshwater environment ; automation
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    Physico-chemical parameters of fish ponds as it affects fish production in Ado-Ekiti, Ekiti State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24590 | 19325 | 2018-05-20 16:05:58 | 24590 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The water analysis of five selected ponds in Ado-Ekiti in Ekiti State, was carried out to determine their suitability for fish culture. Pa rameters analyzed were: Temperature, Turbidity, Carbon (IV) oxide, Alkalinity, Hardness, pH and Dissolved oxygen. Values for temperature ranged between 20.0~'C and 29.0~'C, Turbidity values were between 46.0-50.2cm, Carbon (IV) oxide: 11.5-12.2mg/litre; alkalinity: 100-120mg/liter; hardness: 110-200mg/litre; pH: 6.8-7.8 and dissolved oxygen: 5.8-6.8mg/liter. The values obtained were found to be within acceptable range for fish production.
    Description: Includes: 10 references.
    Keywords: Aquaculture ; Chemistry ; Nigeria ; Physico-chemical parameter ; Fish pond ; Ado-Ekiti ; Fish production ; freshwater environment ; automation
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    Prevalence of parasites in the gut lumen of farmed catfish Clarias gariepinus in Lagos and Ogun States (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24595 | 19325 | 2018-05-20 16:10:53 | 24595 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A cross-sectional study was conducted in four (4) different production systems in Lagos and Ogun States of South Western Nigeria beetween December,2012 and May 2013 to determine the effect of Culture systems and management practices on prevalence of parasites in the gut of farmed catfish (Clarias gariepinus). Information on pond type, water source, feeding practices and general pond management were also gathered through administration of fish disease sample collection from Water for the examination of physicochemical parameters, was collected from 40 fish ponds comprising earthen, concrete, water recirculatory and poorly managed systems across the two (2) States. Temperature, pH and ammonia were monitored using the recommended range by FAO as standard. Also 160 live farmed catfish, 80 from each state, 20 from five different ponds of each system with a minimum of 4 live fish per system was collected, dissected and examined under the microscope for parasite load of the gut of C. gariepinus. The earthen, concrete and water recirculatory systems had good management practices compared to the poorly managed systems. The observed water physicochemical parameters in ponds with good management were within normal range. Five groups of parasites were observed; Protozoa (Eimeria spp), Cestodes (Bothriocephalus spp., Diphyllodium spp), Monogea (Enterogyrus spp), and copepods (Argasilus spp) and Nematodes (Procamallanus spp). Analysis of variance between location and System showed level of no significance (p〈 0.05). The interaction effect of location (State) and production system on parasite load of C. gariepinus also was not significant (p〉0.05). However interaction hetween Ogun and poorly managed system has the highest number of parasites (11.5), followed by Lagos (7.0). The systems with good management practice had low number of parasites with water recirculatory system recording the least number of parasites (0.5). Analysis of association between temperature, ammonia, and pH in all the cultured systems showed a significant level of correlation (p〈0.05). In this study, poorly managed systems especially where farmed fish received water directly from rivers and streams predispose fish to parasite infection of the gut. Good water quality management and proper fish husbandry techniques will eliminate most parasitic infection and improve on fish production.
    Description: Includes: 11 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Parasite ; Water recirculatory system ; C. gariepinus ; freshwater environment ; automation
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    Effect of feeding frequency on growth and survival rate of Clarias gariepinus fingerlings reared in plastic bowls (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24586 | 19325 | 2018-05-20 16:00:00 | 24586 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of feeding frequency on feed intake, growth and survival rates were determined in C. gariepinus. Twenty fish per tank (bowl) were stocked in triplicate. They were fed once (1D), thrice (3D) and five times daily (5D) respectively. The 5D group growth rates were observed significantly different (P〈 0.05) from fish fed on 1 (1D) and (3D) feeding frequency. All the treatments containing 1D, 3D and 5D were observed to have significant difference (P〉 0.05) in terms of final weight (FW). There was also a noticeable increased trend in final weight (5D 〉 3D 〉 7D). Feed conversion ratio (FCR) of 3D and 5D treatments were higher than 1 D) treatment (P〈 0.05). According to the results, feeding C. gariepinus 1 time daily (1D) did not influence the growth; however, 5 times daily reduced mortality and improved the feed conversion ratio (FCR) of C. gariepinus.
    Description: Includes: 9 references〉
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Feeding frequency ; Feed convertion ratio ; Growth ; Survival rate ; freshwater environment ; automation
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    Synthesis of climate change effects on water sources for aquaculture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24592 | 19325 | 2018-05-20 16:08:17 | 24592 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of climate change on the aquatic environment has been well documented with results detailing increase in green house gases and global temperature. Water quantity and quality for aquaculture is also affected by this global phenomenon. Increasing global temperatures affects many sectors in an ecosystem. Water use in aquaculture can be in-situ or ex-situ. Groundwater is expected to be recharged if climate change leads to increased rainfall and runoff but empirical evidence suggests otherwise. The sustainability of groundwater for aquaculture is therefore threatened. Increased temperatures of surface waters can affect water quality and suitability for use in aquaculture with attendant biofouling and growth of thermophilic algae. Rainwater is affected by human activities and pollution as well as materials used for its collection. It is usually low in pH and will need to be buffered. The use of water from any source as well as the use of water bodies for aquaculture must be done with regular analysis of parameters since climate change is an ongoing process.
    Description: 34 references.
    Keywords: Atmospheric Sciences ; Aquaculture ; Nigeria ; Groundwater ; Surface water ; Rain water ; Climate change ; Aquaculture ; automation
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    Aquaculture business management in Nigeria: issues and considerations - a review (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24587 | 19325 | 2018-05-20 16:01:42 | 24587 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Starting an aquaculture business in Nigeria requires a good understanding of the industry. Small aquaculture ventures cannot compete effectively in the present scenario where large farms are springing up in the urban areas of Nigeria. The export market for aquaculture products has not been fully exploited. The export of smoked fish to the United Kingdom has been ongoing and expanding, but it is meant to serve the African community in the UK. The bane of the aquaculture industry lies in the small nature of most of the enterprises. Nigeria has no specific legislation on aquaculture hence the idea of a National Aquaculture Strategic Initiative is a welcome development.
    Description: Includes: 38 references.
    Keywords: Aquaculture ; Nigeria ; Aquaculture ; Socio-economic ; Legislation ; Enterprise ; freshwater environment ; automation
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    Efficiency of different traps for silver catfish fishery and its aquaculture implications in the face of climate change (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24601 | 19325 | 2018-05-21 12:17:22 | 24601 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Climate change has the potential to severely impact coastal and inland environments and ecosystems, and by extension fisheries and aquaculture. Coastal regions of the world are already experiencing flooding due to rise in sea level. In recent times, salinization of coastal areas due to flooding from storm surges and high tidal influence has been observed. Aquaculture is a fast growing agri-business venture in Nigeria presently and many coastal communities derive their livelihood from it. The culture of freshwater fish species that are very sensitive to high salinity may be threatened leading to mortality of stocked fish and loss of livelihood for coastal population. Consequently, there is urgent need for development and domestication of the Silver catfish, Chrysichthys nigrodigitatus that can tolerate higher salinity more than Mudcatfish (Clarias gariepinus). This will help mitigate the impact of salinization of coastal areas arising from sea water flooding on culture of fresh water fish species.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Pollution ; Fisheries ; Chrysichthys nigrodigitatus ; Clarias gariepinus ; Nigeria ; Climate change ; Silver catfish ; Chrysichthys nigrodigitatus ; freshwater environment ; automation
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    Effects of dispersed Bonny Light crude oil on two life stages of Oreochromis niloticus (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24607 | 19325 | 2018-05-21 12:29:07 | 24607 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effects of Goldcrew, a chemical dispersant commonly used in crude oil spill incident, to alter interactions between the components of the crude and the biota in the ecosystem, were studied. We used a static renewal bioassay to study its effects on Bonny light crude using the tilapia, 0. niloticus at various concentrations for 50 days. A control experiment was also set up. The exposure concentration of the water accommodated fractions (WAF) of the mixture of the dispersant and Bonny Light crude, dispersed crude (DCOWAF-PAH) and the WAF of Bonny Light alone (COWAF-FIH) were 0.2,0.4,0.8 and 1.6m/L respectively. The mortalities of the fingerlings in different concentrations of the DCOWAF-PAH were 66.7%, 23.3%, 86.75% and 100% in the 0.2. 0.4, 0.8 and 1.6m/L exposure centrations respectively. At these concentrations, mortality was significantly different (P〈0.05) between the fingergerlings and fry, with a total mortality of 69.2% among the fingerlings, while the fry had 5.8% mortality in the 0.8 and 1.6ml/L concentrations with 13.3% 10.0% respectively but the differences were not statistically significant (p〈0.05). There was no mortality in the concentrations of COWAF- PAH. It can be said that Bonny Light was made more toxic to 0. niloticus by the presence of the dispersant; increased the susceptibility of the fingerlings to the mixture of crude and dispersant and influenced the behavior of the fish. There is therefore need to apply dispersants with caution especially around fish breeding and nursery ground.
    Description: Includes: 8 references.
    Keywords: Aquaculture ; Pollution ; Oreochromis niloticus ; Nigeria ; Goldcrew ; Crude oil ; O. niloticus ; freshwater environment ; automation
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    Effect of sublethal concentrations of formalin on the growth of Clarias gariepinus fingerlings (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24611 | 19325 | 2018-05-22 05:58:34 | 24611 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-15
    Description: Fingerlings of Ciarias gariepinus were exposed to various sublethal concentrations (10.0, 20.0, 30.0. 40.0, 50.0 and 60.0 ~KL/L) formalin and the concentration of 0.0 ~KL/L formalin served as the control. The toxicant led to depressed weight gain in the fish. Severity of this depression was directly proportional to the toxicant concentrations. However, there was no difference (p〉0.05) in weight gain in test fish of various concentrations. Restlessness, loss of balance, erratic swimming behavior, respiratory distress, vertical movement and death, were observed in test media especially in the concentrations 60.0 and 50.0~Kl/L of formalin. Such observation were not recorded in the control tanks.
    Description: Includes: 9 references.
    Keywords: Aquaculture ; Pollution ; Clarias gariepinus ; Nigeria ; Clarias gariepinus ; Formalin ; Concentration ; freshwater environment ; automation
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    Tilapia sex reversal using methyl testosterone (MT) and its effect on fish, man and environment (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24621 | 19325 | 2018-05-22 06:17:09 | 24621 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Tilapia is the second leading aquatic crop globally, next to carps and its production has increased tremendously within the last decade. Its production is however affected by stunting, a phenomenon brought about by overpopulation due to precocious reproduction under mixed sex culture system. Several methods such as use of predatory fish, hybridization, polyploidy and sex reversal, using methyl testosterone have been employed w1th different degrees of success. This paper reviews the use of methyl testosterone in sex reversal of tilapia and its consequent effects on fish, man and environment. It established the preference of all-male tilapia due to better and more uniform growth under culture system. It has been demonstrated that the hormone does not have any adverse effect on fish flesh after cessation of treatment of tilapia fry. In like manner; ingestion of fish produced by sex reversal does not therefore harm man. However,one is not too sure of the effect of the hormone or its by- products on vital organs (liver, kidney, pancreas and gills), metabolic profile and nucleic acids. This may also affect muscle building and perceived libido-enhancement in man. On the environment, the steroid is either biodegraded or mineralized. It must be stated that escapee from tilapia hatchery into the natural water may, however, alter the dynamics of the environment due to unforeseen consequences.
    Description: Includes: 14 references.
    Keywords: Aquaculture ; Biology ; Oreochromis niloticus ; Nigeria ; Sex reversal ; Tilapia ; Man ; Environment ; freshwater environment ; automation
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    Perception of fish farmers to climate change and adoption strategies in Oyo State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24667 | 19325 | 2018-05-27 15:06:16 | 24667 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study identified the perception of fish farmers in Oyo State to climate change as well as the adaptation strategies used by them. A two stage stratified sampling method was used to select 156 fish farmers from the four Agriculture Development Programme (ADP) zones and eight local government areas (LGAs) in Oyo State. Structured questionnaires were administered to the fish farmers. Descriptive statistic and linear regression were used to analyses data collected. The result shows that majority were males (84.0%\}, dominant age (66.0%) were within the age bracket of 46-65 years. The farmers are literate as 46.8% have attained secondary education, 69.9% had above six years of experience in fish farming experience and 97.5% were engaged in culturing catfish Clarias spp. The highest portion (70.5%) earns less than N500,000 as income from fish sale. Due to effect of climate change on fish production in the study area, fish farmers reported different types of adaptation strategies. Result of the linear regression analysis indicates that there is a significant (p〈0.05) negative effect of household size and years of fish farming experience and significant (p〈0.1) positive effect of age on farmers' perception of climate change on fish production.
    Description: Includes: 7 references.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Agriculture development programme ; Climate change ; Fish farmers ; freshwater environment ; automation
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    Impact of calcium carbonate on the juveniles of brackish river prawn, Macrobrachium marobrachion under laboratory conditions (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24674 | 19325 | 2018-05-23 07:49:22 | 24674 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The acute toxicity and the effect of sub-lethal concentrations of calcium carbonate on the morphology of M. macrobrachion were investigated under laboratory conditions. The prawns were exposed at 0, 160, 320, 640, 1280, 2560 and 5120 mg/l of CaCO3 using static renewal bioassay for 96 hours for the acute toxicity test. The prawns were also exposed for the chronic test at 0, 20.0, 40.0, and 80.0 mg/1 for a period of two weeks. Mortality occurred in the bioassay tanks at random and the bioassays were monitored throughout the exposure period. Results showed that exposed prawns were not significantly impacted when compared with the control group and correlations were significant at P〈0.05. There were no mortalities in the tanks with the highest concentrations while one death was recorded in the control tank and in the tank with the 160 and 320mg/1 of CaCO3 respectively. The gills of exposed prawns were analyzed using photomicrography and the results showed that the organs had their normal morphological status after the exposure time, implying that CaCO3 is non-toxic to M. macrobrachion. The applications of the result to prawn culture and water quality management were discussed in details.
    Description: Includes: 12 references.
    Keywords: Pollution ; Aquaculture ; Macrobrachium macrobrachion ; Nigeria ; Acute toxicity ; Sub-lethal concentration ; Static renewal bioassay ; Histology ; freshwater environment ; automation
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    Socioeconomic analysis of fish farming in Ogun State, southwest Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24666 | 19325 | 2018-05-27 15:04:08 | 24666 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Fish farming as an economic activity in Nigeria is predominantly an extensive land based system practiced at subsistence level in water. The socio-economic analysis of fish farming in Ogun State, South-Western Nigeria was carried out using data collected from sixty randomly selected fish farms. Data were analyzed using descriptive statistics, costs and returns, as well as regression analysis. The relationship between fish output and five inputs: feed, fertilizer, lime, labour and fingerlings were measured using Cobb-Dou production model. Results suggest that a unit increase in feed application contributed 68 percent increase to the profitability of the farms and this was significant at p〈0.1. Also, fertilizer was significant at p〈0.05, the results suggest that a unit increase in fertilizer application contributed 5l percent increase to the profitability of the fish farms. The model explained 79% of the variation in total output. On the whole, fish farming was found to be profitable with a benefit-cost ratio of 1.23 and the rate of return on investment is 0.19. It is recommended that fish farmers in the study area should increase their use of feed, lime and fingerlings and decrease their use of fertilizer and labour. Socio-economic characteristics of fish farmers showed that most of them were males, married and middle aged with formal education.
    Description: Includes: 33 references.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Ogun State ; Economic analysis ; Aquaculture ; Fish farming ; Cobb-Douglass model ; freshwater environment ; automation
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    Growth performance of Clarias gariepinus fingerlings fed diets with graded levels of yeast (Saccharomyces cerevisiae) used as a floater additive in concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24159 | 19325 | 2018-05-13 13:04:38 | 24159 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Completely randomized design with duplicate groups were used to study the growth performance of 400 fingerlings of Clarias gariepinus in 2m x 2m x 1m concrete tanks in an out-door hatchery complex of National Institute for Freshwater Fisheries Research (NIFFR), New Bussa, Niger State, Nigeria. Graded levels (0, 1,2,3 or 4) % of yeast (Saccharomyces cerevisiae) was included into a 40% crude protein (C.P) NIFFR floating basal diet and fed to Clarias gariepinus in tanks for 16 weeks and 35% in the last 4 weeks. This was to determine the optimum level of supplemental yeast inclusion as a floater additive into diets of C. gariepinus and to quantify feed and its cost for raising a kilogram of the fish fed diets. The experiment was geared towards development of cost effective standard floating feed for Clarias gariepinus. There was no significant difference in weight gain (WG), feed consumed (FC), specific growth rate (SGR), survival, cost of feed consumed (CFC) and palatability test of flesh (P〉0.05) except FCR (P〈0.05) and feed cost per kilogram of fish (P〈0.05) at the end of 8 and 20 weeks. There was no histopathological defect observed on the fish and fish carcass. It was concluded that 2% or 1 % level of yeast can be included in NIFFR floating feed with the assurance of producing a kilogram of C. gariepinus with a feed of N300.00 under good management practices based on ingredient ruling price at the time of this study and this might be capable of increasing farmer's income in fish production.
    Description: Includes: 1 table and 2 figures.;Also includes: 21 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Niger ; Yeast ; Floating additives ; Performance ; Clarias gariepinus ; freshwater environment ; Growth rate ; Freshwater fish ; Fingerlings ; Artificial feeding ; Feeding experiments ; Feed ; Yeasts ; Additives ; Culture tanks ; Cost analysis ; Performance assessment ; Fish culture
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    Growth performance and nutrient utilization of post fingerlings Clarias gariepinus fed varied levels of biscuit waste (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24162 | 19325 | 2018-05-13 13:15:18 | 24162 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A feeding trial was conducted to determine the effect of biscuit waste meal on the growth performance and utilization of Clarias gariepinus juveniles. A total of 300 juveniles of average weight 8.85g were randomly divided into 5 Treatments, each with three replicates. Twenty juveniles were distributed into fifteen happas (0.7m3) and each happa was suspended to 3/4 of its volume using kuralon ropes carefully tied round the bamboo poles across the concrete tanks. Five diets containing 40% crude protein were formulated in which maize was replaced with biscuit waste meal at Treatment diet 1 (TD1) 0%, 25% (TD2), 50% (TD3), 75% (TD4), 100% (TD5) levels.The juveniles were fed at 3% body weight per day for 10 weeks. It was recorded at the end of the experiment that biscuit waste was most suitable as an energy supplement when incorporated at 25% replacement (TD2) with maize. TD1 had the highest weight gain followed by TD2, TD3, TD4 and TD5 respectively. There were no significant differences (P〉0.05) in the growth response in TD1 (0%), T0D (25%) and TD3 (50%). It is therefore concluded that biscuit waste meal is a cheap source of non conventional energy source which can be used favorably to replace maize (25% inclusion level) as an energy source in the diets of Clarias gariepinus.
    Description: Includes: 7 tables.;Also includes: 15 references.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Abeokuta ; Treatment ; Biscuit waste ; Net hapa ; Juvenile ; Crude protein ; freshwater environment ; Growth rate ; Nutrition ; Freshwater fish ; Fingerlings ; Diets ; Wastes ; Feed ; Feeding experiments ; Fish culture
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    The effects of Baker's yeast (Saccharomyces cerevisiae) on rearing of Heterobranchus longifilis: growth and survival in outdoor concrete tanks (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24158 | 19325 | 2018-05-13 13:02:50 | 24158 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Heterobranchus longifilis juveniles (93.42 - 147.77g) used for this study were product of an indoor experiment in glass aquaria transferred to outdoor tanks. This study is therefore, a continuation of the indoor study using the same feed for the fish outdoors for 230 days. They were stocked in ten concrete tanks, of sizes 2m X 2m. The fish were stocked according to the number harvested from the indoor experiment for each treatment. The experimental diets were prepared with fish meal, soybean, groundnut cake, wheat offal, yeast, premix, starch, vitamin C and Vitamin B-complex to meet the requirement of H. longifilis. The analyzed crude protein in each diet was 42.56%, 43.32%, 4369%,43.86% and 43.98%. There was significant variation (p〈0.05) in the Mean Final Weight (MFW), Mean Weight Gain (MWG), Protein Efficiency Ratio (PER), Specific Growth Rate (SGR) and Percentage Survival (PS). The survival of the fish was highest with the fish fed 2g yeast/I00g of diet and this was not significantly different from fish fed 1g yeast/ 100g diet. The cost of production of one kilogram of fish using varying levels of S. cerevisiae in diets varied significantly (p〈0.05).
    Description: Includes: 2 tables.;Also includes: 18 references.
    Keywords: Aquaculture ; Ecology ; Heterobranchus longifilis ; Nigeria ; Niger ; Growth ; Survival ; Heterobranchus longifilis ; Yeast ; freshwater environment ; Freshwater fish ; Yeasts ; Artificial feeding ; Diets ; Feeding experiments ; Culture tanks ; Growth rate ; Survival ; Fish culture
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    Preliminary investigation of Tribulus terrestris (Linn. 1753) extracts as natural sex reversal agent in Oreochromis niloticus (Linn. 1758) larvae (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24169 | 19325 | 2018-05-13 18:49:22 | 24169 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Five pairs of brood stocks of Oreochromis niloticus (average weight of 350 ~c 25.8g) in a ratio of 1:1 male to female were used for the fry production to examine the prospect of utilization of safer and natural extract (Tribulus terrestris) as sex reversal agent in tilapia population control. Four hundred and fifty day-old fry were randomly distributed into 18 experimental tanks (30 litres capacity) representing five test diets (50% crude protein) containing varying inclusion levels of Tribulus terrestris extract at 0.0, 1.0, 1.5, 2.0, and 2.5g per 1kg of basal feed while diet six contain 50mg per 1kg of basal feed of 17-a-methyltestosterone (MT) served as the control diet. The growth performance parameter indices measured were Mean Weight Gain (MWG), Food Conversion Ratio (FCR) and Specific Growth Rate (SGR). At the end of the study, the survival rates and sex ratio were also measured and recorded. Data collected were subjected to 2-way analysis of variance (ANOVA) where significant means were tested using the Least Significant Difference (LSD) test at p = 0.05.
    Description: Includes: 3 tables.;Also includes: 17 references.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Ibadan ; Sex reversal ; Tribulus terrestris ; Oreochromis niloticus ; freshwater environment ; Sex reversal ; Agents ; Freshwater fish ; Genetically modified organisms ; Monosex culture ; Survival ; Growth rate ; Population control ; Fish culture ; Aquaculture techniques
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    The use and acceptability of medicated fish feed in aquaculture (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24172 | 19325 | 2018-05-13 18:53:40 | 24172 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Medicated feed in animal production systems is essential to economically produced healthy and high quality product, as it can be used to control bacterial disease. The paper review, outlined the availability of common medicated fish feeds used in aquaculture such as; Terramycin, Romet and Homemade medicated feeds. This paper also review Common Anti-parasitic medicinal foods on the Nigeria market, such as; Jungle Anti-Parasite Medicated Fish Food and MetroMed. It also emphasizes on how to select proper medication for use in aquaculture and how to store medicated feed. Medicated feed is recommended to control bacterial disease outbreaks which may be controlled by antibiotics. There are only two widely accepted and approved antibiotics available in medicated feeds for food fish. However, early diagnosis and treatment are necessary because once fish are sick they are unlikely to eat, and prevention through good management practices is the best control measure for bacterial diseases.
    Description: Includes: 8 references.
    Keywords: Aquaculture ; Nigeria ; Delta ; Medicated feed ; Aquaculture ; Terramycin ; Romet ; Nigeria ; freshwater environment ; Feed ; Antibiotics ; Bioselection ; Fish diseases ; Disease control ; Medicine ; Bacterial diseases ; Fish culture
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    The effects of dichlorvos (2, 2 - dichlorovinyl phosphate (DDVP)) induced stress on the growth of fingerlings of Clarias gariepinus (Burchell, 1822) (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24165 | 19325 | 2018-05-13 13:30:18 | 24165 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to determine the effects of dichlorvos ~9 2, 2 - dichlorovinyl dimethyl phosphate (DDVP)~0 on the growth of Clarias gariepinus fingerlings. The experiment was conducted in two phases: the first phase involved the exposure of the fish to different concentrations ~9 0.00 (control), 0.4ppm, 0.5ppm, 0.6ppm, 0.7ppm, 0.8ppm, 0.9ppm, 1.0ppm, 1.1 ppm and 1.2ppm~0 of dichlorvos for four days. The second phase was a recovery process in which the fish that survived from the first phase were introduced into clean, dechlorinated, toxicant-free water and were fed at 3% of their body weight for 12 weeks. The change in weight was measured every fortnight and the feed fed was adjusted to accommodate the change in weight. The highest values for weight gain, percentage weight gain, specific growth rate and average daily weight gain occurred in the control and these values were significantly (p〈0.05) higher than the values of these parameters recorded in the other treatments. The range of values of weight gain, percentage weight gain, specific growth rate and average daily weight gain are 6.76 ~c 3.01-18.45 ~c 8.90g, 69.45 ~c 18.52 - 105.52 ~c 33.67%, 1.54 ~c 0.33 - 2.08 ~c 0.46%/day and 0.48 ~c 0.21 - 1.21 ~c 0.65g respectively. Based on the results of this study, the exposure of fingerlings of Clarias gariepinus to dichlorvos ~9 2, 2- dichlorovinyl dimethyl phosphate (DDVP)~0 affected the growth of the fish. Therefore, the use of dichlorvos on stored grains should be regulated because uncontrolled usage could cause mortality and impairment of growth in fish if the pesticide gets washed into water bodies inhabited by fish.
    Description: Includes: 1 table.;Also includes: 9 references.
    Keywords: Aquaculture ; Ecology ; Pollution ; Clarias gariepinus ; Nigeria ; Lagos State ; Toxicity ; Pesticide ; Clarias gariepinus ; Growth performance ; freshwater environment ; Freshwater fish ; Fingerlings ; Toxicants ; Pesticides ; Toxicity ; Bioaccumulation ; Feeding ; Growth rate ; Pollution effects
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    Haematological changes of Clarias gariepinus juveniles fed different dietary lipid (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24234 | 19325 | 2018-05-19 07:29:20 | 24234 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Twelve weeks feeding trial was conducted to determine the effects of different dietary lipid sources on the hematological changes in Clarias gariepinus juveniles. Six (6) iso-nitroginous diets were formulated at 45% CP and fed to triplicate groups of 15 juveniles. The feed contained (Palm Seed Oil (PSO), Ugwu Seed (USO), Soya Bean Oil (SBO), Almond Seed Oil (ASO), Mixture Of All the vegetable oil + the fish oil (MOA) and Cod Liver Oil (CLO) which is the control. The oils were added at 5% inclusion level respectively. Fish of mean weight 22.83 ~c 0.30g were fed these experimental diets in triplicate groups. The hematological analyses of fish showed that red blood cell, white blood cell, Erythrocyte sedimentation rate ( ESR), Mean cell volume (MCV), Mean cell Haemoglobin (MCH) and packed cell volume were not significantly different (p〈0.05), but haemoglobin concentration and Mean cell haemologlobin concentration (MCHC) were significantly different (p〉0.05). The present study showed that PSO, USO, ASO, SBO and MOA can effectively replace cod liver oil without compromising the health of African catfish, Clarias gariepinus.
    Description: Includes: 17 references.
    Keywords: Aquaculture ; Ecology ; Clarias gariepinus ; Nigeria ; Dietary lipid ; Juveniles ; Haematology ; Clarias gariepinus ; Haematology ; Phase changes ; Freshwater fish ; Juveniles ; Diets ; Lipids ; Feeding ; Feed ; Blood cells ; Fish oils ; Experimental research ; Laboratory culture
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    Effect of Terminalia suparba on fecundity and latency period of Clarias gariepinus broodstocks (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24067 | 19325 | 2018-05-10 10:15:21 | 24067 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study focused on the assessment of Terminalia suparba (bark, leave and root) based diet to improve the ovulation of Clarias gariepinus brood stocks. Ten female and ten male brood stocks were obtained from a reputable fishfarm in Ogun State, Nigeria and were fed with the diets for four weeks before the breeding exercise. The latency period observed in treatments 1 to 4 was 4hours 30minutes while the ovulation period in treatment 5 was 8 hours. There was no significant different (P〉0.05) among the means. The brood stocks in Treatment 2 (Root) has the highest fecundity count (2001) while those in Treatment 5 (control) has the least fecundity count (1496). The phytochemical analysis of the plant materials showed the presence of Alkaloids, Tannin, Phenol, Glycoside, Flavonoids, Steroids, Phlobatannin, Saponin, Anthraquinones. The physical and chemical parameters of water observed showed that dissolved oxygen value ranges from 3.28 -4.60, pH 6.5 - 8.5, temperature 28.0 - 28.8 and conductivity 8.9 - 9.20. It is therefore concluded that the inclusion of Terminalia suparba in the feed of Clarias gariepinus broodstock will not only improve ovulation but also reduce the latency period.
    Description: Includes: 5 tables;Also includes: 11 refs.
    Keywords: Aquaculture ; Chemistry ; Ecology ; Clarias gariepinus ; Nigeria ; broodstocks ; Terminalia specie ; Latency ; fecundity ; Clarias gariepinus ; freshwater environment ; Artificial feeding ; Feeding experiments ; Fecundity ; Brood stocks ; Sublimation heat ; Ovulation ; Physicochemical properties ; Fish culture
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    Design and construction of microcontroller-based automatic fish feeding device (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24068 | 19325 | 2018-05-10 10:17:48 | 24068 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper presents the design, construction and demonstration of an automatic fish feeder. It is a microcontroller-based system. This system is designed to dispense a predetermined amount of fish feed into an aquarium at a particular time each day. The device consists of a cylindrical can, distributing tubes and a stand. The dispensing of food is controlled by the use of a stepper motor, which is situated under the canister. A timer controlled switch is used to control the time at which the motor rotates, by a program burned into the microcontroller. The fish feeder was successfully fabricated and tested. It dispenses food automatically at set preset times. It is expected that this device will enhance the fish farming efforts of the local farmers, especially the armature farmers who combine fish farming with other businesses.
    Description: Includes: 4 figs.;Also includes: 9 refs.
    Keywords: Aquaculture ; Engineering ; Nigeria ; freshwater environment ; Aquaria ; Fish culture ; Feeding equipment ; Design
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    Aquaculture and the environment (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24072 | 19325 | 2018-05-12 13:54:51 | 24072 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Aquaculture industry in the last five decades has grown at an unprecedented rate (Average growth of 3.2 percent per year) stimulated by the increased demand for fish and fishery products as global population awareness of fish as a health food increased and the population from capture fisheries becomes almost static. In the light of the noticeable expansion, this review paper focuses on the deleterious effect of many aquaculture practices which includes; degradation of terrestrial environments, pollution from chemical as well as waste and nutrient loading, diseases to mention but a few. Measures are proffered to reduce the negative impact of Aquaculture on the environment. The efforts of the National Environmental Standards and Regulation Enforcement Agencies (NESREA) as it concerns EIA should be broadened to ensure that small aquaculture ventures along the coastline and within inland water bodies be considered to avoid environmental hazards.
    Description: Includes: 2 tables;Also includes: 32 refs.
    Keywords: Aquaculture ; Pollution ; Nigeria ; Aquaculture ; Environment ; Poverty ; EIA ; Food security ; freshwater environment ; Aquaculture ; Aquaculture systems ; Environmental degradation ; Chemical pollution ; Wastes ; Environmental effects ; Environmental legislation ; Environmental assessment ; Food security ; Pollution effects
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    The concept of Adopted Villages and Agricultural Research Outreach Centres -implications for fisheries development in Nigeria: a review (2021)
    FISON | Minna (NIgeria)
    In:  http://aquaticcommons.org/id/eprint/24073 | 19325 | 2018-05-12 13:58:14 | 24073 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Adopted village/Agricultural Research Outreach Centres (AROC) initiative is specifically conceived by the Federal Government of Nigeria in order to avoid the weaknesses and shortcomings of the conventional method of technology transfer to the farmers through the extension staff of the Agricultural Development Projects. This paper examined the relevance of the concept in the development of the fisheries sector. Methods and guidelines adapted so far and modalities for actualization of targeted aims and objectives were also examined. The economic importance of fish to the economy of Nigeria was highlighted. Recommendations were given as way forward for the success of the project and its continuity.
    Description: Includes: 16 refs.
    Keywords: Fisheries ; Aquaculture ; Nigeria ; freshwater environment ; Agriculture ; Research programmes ; Technology transfer ; Development projects ; Extension activities ; Fisheries ; Fishery economics
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    Aflatoxin levels in fish feeds in Abeokuta, Ogun State (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24071 | 19325 | 2018-05-12 13:53:17 | 24071 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Post harvest contamination can occur if drying of feed is delayed and when water is allowed to exceed critical values for mould to grow during storage. This study examined the aflatoxin levels in fish feeds surveyed in Abeokuta, Ogun State, Nigeria. Fifteen (15) fish farms were randomly selected for assessment of the aflatoxin levels in fish feeds in Abeokuta. After the estimation of the aflatoxin levels using Veratox quantitative aflatoxin test, the Aflatoxin concentrations in the samples ranged between 0-49 ppb with a mean value of 6.89 ppb. Results obtained from this study showed that aflatoxins were found to be associated with fish feeds in different fish farms in Abeokuta, but, a very high proportion of the feed samples were below the regulatory levels (maximum of 20 ppb) that may not be toxic to the health of the fish according to the regulatory levels for aflatoxins issued by the Food and Administration of the United States. Thus, feeds fed to the cultured fish species in farms in Abeokuta were fit for consumption, with very little or no threat of aflatoxicosis (a disease that can affect many species of fish, when feed contaminated with aflatoxin is consumed).
    Description: Includes: 1 table and 1 figure;Also includes: 13 refs.
    Keywords: Aquaculture ; Conservation ; Nigeria ; Fsh feeds ; Aflotoxin ; Aflotoxicosis ; Aspergillus species ; Aflotoxin in fish feeds ; freshwater environment ; Feed ; Pollution ; Storage ; Storage effects ; Biological poisons ; Fish
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    Assessment of the adoption of aquaculture technologies in Niger State, North Central Nigeria (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24075 | 19325 | 2018-05-12 14:01:24 | 24075 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: A total of 115 respondents were examined through purposive and cross sectional approach using questionnaire in nine Local Government Areas of the state. About 58% of the respondents were small scale fish farmers with annual income from fish farming being in a range of N151,00O0 to N200,000 per annum. Majority of the respondents fell within the age of 31-50 years, civil servants by occupation and mostly having tertiary education. The respondents generally had positive attitude to fish farming with comparatively high rate of awareness in relation to adoption of 14 aquaculture practices under investigation in this study. Inadequate extension education, water scarcity and costly and unaffordable fish feeds were observed as major threats to fish farming in the study area.
    Description: Includes: 4 tables;Also includes: 12 refs.
    Keywords: Aquaculture ; Management ; Aquaculture ; Technologies ; Fish farmers ; Awareness ; Adoption ; Civil servants ; freshwater environment ; Aquaculture ; Extension activities ; Technology transfer ; Fishery economics ; Economic benefits ; Aquaculture economics
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    Exploitable socio-economic benefits of mangrove oyster culture to the people of Niger Delta (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24077 | 19325 | 2018-05-12 14:05:45 | 24077 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The Niger Delta, a 30,000 km2 wetland of global ecological significance is located at the southernmost part of Nigeria. The Delta is dissected by a dense network of rivers and creeks of saline and freshwater surface bodies. The brackish water (saline) sector consists of estuaries and intertidal mangrove swamps; the total brackish water area for the Niger Delta estimated at about 7,415 km2. The mangrove oysters grow chiefly in brackish water creeks of Bayelsa, Delta and Rivers States, found attached to the aerial roots of the mangrove Rhizophora racemosa (Red mangrove). Mangroves are salt-tolerant evergreen forests found along sheltered coastlines, shallow-water lagoons, estuaries, rivers or deltas; stands stretching 30-40 km inland with an estimated area of 997, 700 ha in Nigeria. Aquaculture has an important role in the development of many national economies and plays a key role in rural development. The abundance of a natural population of mangrove oysters in the Niger Delta makes seed collectors and growing easier and inexpensive. The culture of mangrove oysters by the locals will contribute significantly to economic growth, increases income and food security, efficient utilization of surplus rural labour and reduced social problems, poverty alleviation, and social stability. This paper enumerates the culture and socio-economic benefits derivable from the practice of aquaculture through the sustainable culture of the native mangrove oysters.
    Description: Includes: 2 figures;Also includes: 10 refs.
    Keywords: Aquaculture ; Sociology ; Nigeria ; Niger Delta ; Crassostrea gasar ; Mangrove swamp ; Communities ; Household income ; Oyster culture Filter feeding ; brackishwater environment ; Oyster culture ; Economic benefits ; Exploitation ; Mangrove swamps ; Population number ; Food security ; Utilization ; Socioeconomic aspects ; Sustainable fishing ; Shellfish culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 75-78
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    Comparative assessment of fermented maize broth and cassava waste water on the growth performance of catfish (Clarias gariepinus) fry (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24078 | 19325 | 2018-05-12 14:08:28 | 24078 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The study was conducted to evaluate and compare the growth performance of catfish fry on fermented maize broth and cassava waste water. Four day old fry (weight range 0.002 - 0.003g) of C. gariepinus were acclimatized in 10 litres glass tank of water for 5 days in Aquaculture Department of Nigerian Institute for Oceanography and Marine Research, Victoria Island, Lagos. Shell free artemia was mixed with Fermented Maize Both (FMB), Fermented Cassava Waste water (FWC) and bore hole water (control) respectively. The artemia mixtures were allowed to air-dry before administration. The treatments were produced in triplicates, feeding, ad-libitium for 30 days. The fry were fed with the treated shell free artemia and weighed every 6 days. The results revealed that fry fed fermented cassava waste water [FCW] diet showed highest mean weight, daily growth rate [DGR], survival rate and specific growth rate [SGR] and lowest food conversion ratio (FCR). This was followed by fermented maize broth while fish fed artemia mixed with borehole water-had the least growth. The results suggest that addition of fermented cassava waste water to shell free artemia can enhance fish growth in catfish hatchery production.
    Description: Includes: 1 table and 1 figure;Also includes: 13 refs.
    Keywords: Aquaculture ; Clarias gariepinus ; Nigeria ; Lagos ; Growth performance ; Fermented cassava waste water (FCW) ; Maize broth (FMB) ; freshwater environment ; Feeding experiments ; Fish culture ; Growth rate ; Fish ; Fry ; Feed ; Nutrients (mineral) ; Waste water ; Comparative studies ; Fermentation ; Length-weight relationships
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 79-83
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    Growth performance and feed utilization of Clarias gariepinus (Teugels) fed different dietary levels of soaked Bauhinia monandra (Kutz) seed meal (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24076 | 19325 | 2018-05-12 14:04:20 | 24076 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study was conducted to evaluate the suitability of soaked Bauhinia monandra (Kutz) seed as alternative protein source for Clarias gariepinus and to determine cost of feed compounded. The proximate analysis of the diet and carcass composition of fish (crude protein, crude fibre, ash, moisture content and lipid were determined using AOAC (1980). Data for each parameter were subjected to analysis of variance (ANOVA) while means of various results were compared at 5% level of significance. A preliminary study was conducted to determine the best processing method that reduced anti-nutrients to the minimum level without impairing nutrients composition. Boiled, toasted and soaked seeds were used. Bauhinia seeds soaked for 96 hours had least concentration of anti-nutrients. The experimental diets was formulated to contain soaked Bauhinia seed meal (SBSM) at levels of 25%, 50% and 75% inclusion (Diets 2, 3 and 4 respectively) with two diets acting as control (Diets 1 and 5). All diets were isonitrogenous (40% crude protein) and isocaloric (3212kcal/kg). A 12 weeks feeding trial was conducted in juveniles which were randomly distributed into 24 improvised non-recirculatory and semi-flow through indoor plastic tanks (52cm X 34cm X 33. 5cm) at a stocking rate of 10 fish per tank and three (3) replicates per treatment. The experimental design was complete randomized. The fish were fed at 5% body weight, twice daily. Diets with higher inclusion levels of SBSM (diets 3 and 4) significantly depressed growth formance of fish. The variations observed in the SGR, FCR, FER and PER were associated with the anti-nutrients present in the diets, these parameters reduced with increasing levels of SBSM in the diets of fish. Based on the relative cost of diets per unit eight gain and protein gain, diet 2 (25% SBSM) was most economical. The results suggested that SBSM can be used to substitute up to 25% levels of dietary protein in C. gariepinus juveniles without significant reduction in growth.
    Description: Includes: 4 tables;Also includes: 23 refs.
    Keywords: Ecology ; Aquaculture ; Nigeria ; Katsina State ; Growth ; Feed utilization ; i Clarias gariepinus/i ; freshwater environment ; Fish ; Feeding ; Utilization ; Diets ; Feeding experiments ; Carcasses ; Growth rate
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 66-74
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  • 100
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    Lenght-weight relationship and condition factor of blackchin tilapia (Sarotherodon melanotheron) cultured in sheltered outdoor tanks (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24082 | 19325 | 2018-05-12 14:16:24 | 24082 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Length-weight relationship (LWR) and condition factor (K) of ninety specimens of Blackchin tilapia, Sarotherodon melanotheron cultured for six months in sheltered outdoor tanks were conducted. Initial measurements averaged 0.04 g for weight, while the total length averaged 1.17 cm. Fortnightly, measurements of length and weight gain were recorded over a period of six months. At the end of the experiment, the total length averaged 12.58 cm while the average body weight was 28.55 g. The growth equation for the population studied is Log W = 2.808Log L - Log 1.6117 where the growth factor b estimated showed a negative algometric growth. The average condition factor k was found to be 1.754 ~c 0.329 and there was a very strong positive correlation (r = 0.99) between the length and weight of individuals examined. The correlation coefficient (R2) was estimated to be 0.9974. The implication of the LWR parameters to rearing this species in a confined enclosure was highlighted.
    Description: Includes: 2 tables and 1 figure;Also includes: 11 refs.
    Keywords: Aquaculture ; Ecology ; Sarotherodon melanotheron ; Nigeria ; Lagos ; Sarotherodon melanotheron ; Lenght-weight relatioship ; Condition factor ; freshwater environment ; Length-weight relationships ; Condition factor ; Fish ; Fish culture ; Population dynamics ; Fibre glass ; Culture tanks ; Fry
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 98-102
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