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Articles by A.A.A. Ugwumba
Total Records ( 6 ) for A.A.A. Ugwumba
  O.A. Sogbesan , A.A.A. Ugwumba , C.T. Madu , S.S. Eze and J. Isa
  The potential of soil and agro-allied waste substrates in vermiculture was assessedin terms of their efficiency for growth, reproductive performance and zoomass production of cultured earthworms (Hyperiodrilus euryaulos). Four wooden boxes were stocked in duplicates with 50 matured H. euryaulos of average weight 1.94`0.2 g and cultured for 12 weeks. Harvested earthworms were dried, used to formulate five 42.5% isoproteic diets and 1900 kJ/100 g isocaloric diets and fed to fingerlings of Heterobranchus longifilis for 70 days. In both vermireactors, the earthworm grew very well with significantly different (p< 0.05) mean weight gain, 304.25 and 208.15 g ffom agro-allied and soil substrate respectively. Significantly (p< 0.05) higher specific growth rate of 0.73% day-1 and reproductive performance of 2,120 worms kg-1 of substrate were from agro-allied substrate compared to 0.59% day-1 and 1,914 worms kg-1 of substrate, respectively from soil substrate worms. The highest percentage weight gain, 400.5% fish-1 and specific growth rate of 0.999% day-1 were in fish fed control diet. The lowest feed conversion rate, 1.51; highest protein efficiency ratio, 1.52 and apparent net protein utilization, 52.48% were from 25% earthworm meal diet. The highest daily energy gain 3.34 kJ fish-1 day-1 was from the control diet. There was significant differences (p< 0.05) between the growth and feed utilization indices. Haematocrit level, haemoglobin concentration and leucocyte count improved with earthworm inclusion levels. The highest profit index, 9.33; lowest incidence of cost, 1.17 and highest cost benefit, 2.38 were from 25% earthworm meal diet. Based on results from this study agro-allied waste substrate could be a better culture substrate for H. euryaulosthan soil substrate and 7.5 to 25% earthworm meal inclusion is recommended in the diet of H. longifilis fingerlings for profitable and sustainable aquaculture practices.
  O.A. Sogbesan , C.T. Madu and A.A.A. Ugwumba
  Two hundred and forty Bufo maculata tadpoles of weight range 0.038-0.045 g (mean weight 0.04±0.008) g and lengths 1.2-1.6 cm (mean 1.4±0.018 cm) were randomly selected from a breeding tanks (2.0H 2.0H1.0 m) and raised in outdoor concrete culture tanks (1.0H1.0H0.75 m) for 84 days and monitored for growth, productivity and nutrient utilization. Tadpole were harvested, processed into meal and used in compounding five experimental diets of 42.5% crude protein to replace fish meal at different inclusion levels of 0% (control), 25, 50, 75 and 100% fed to Heterobranchus longifilis fingerlings. The mean weight gain for cultured tadpole was 3.16 g/tadpole; specific growth rate 2.21% and feed conversion ratio, 1.04. The result of the feeding experiment shows that WG, RGW, SGR, FCR and feed intake favoured fingerlings fed 50 and 25% whole tadpole meal inclusion diets with insignificant difference p< 0.05 compared to other treatments. Highest insignificant difference p< 0.05 apparent crude protein digestibility of 90.88% was in 25% whole tadpole meal. Better cost benefit ratio was reported in 25 and 50% whole tadpole meal diets. Based on the result of this study, the replacement of tadpole meal is recommended to 50% inclusion levels in the diet of H. longifilis for better growth performance, feed utilization, health status and cost benefits.
  O.S. Fakayode and A.A.A. Ugwumba
  A study was conducted to investigate the effects of replacement of fishmeal with palm grub; insect larva on two popularly mud catfish species in Nigeria. Clarias gariepinus (0.73±0.01 g) and Heterobranchus longifilis fingerlings (0.67±0.01 g) were fed five isonitrogenous diets of about 40% crude protein, with varying levels (0-100%) of palm grub meal for 12 weeks. The differences in the growth and nutrient utilization of the fingerlings on the various diets were generally insignificant (p>0.05) above 25% inclusion level of palm grub. C. gariepinus and H. longifilis fingerlings fed 25% palm grub inclusion diet had the highest weight gain (5.30 and 4.05 g, respectively), relative (726.0 and 595.6%) and specific (1.09 and 1.00%) growth rates while those fed 100% palm grub inclusion diet showed least growth; weight gain (2.68 and 2.15 g), relative (367.1 and 316.2%) and specific (0.80 and 0.45%) growth rates, respectively. Food conversion and protein efficiency were also best in fingerlings fed 25% palm grub meal diet (0.70 and 1.35 for C. gariepinus; 0.75 and 1.35 for H. longifilis respectively) with decreasing efficiency as palm grub inclusion level increased in the diets. The study showed that palm grub can be used to completely replace fishmeal in mud catfish diets. However, for optimal growth and nutrient utilization, 25% level of replacement of fishmeal with palm grub meal is most adequate in C. gariepinus and H. longifilis fingerlings diets.
  A.O. Sogbesan , A.A.A. Ugwumba and C.T. Madu
  In the present study 60 Adult Earthworms (H. euryaulos) of weight and length range 1.7-3.0 g (mean-2.34±0.91 g) and 13.0-28.0 cm (mean-21.5±5.8 cm), respectively were cultured for 12 weeks. The productivity potential and nutrient composition of earthworm (H. euryaulos) cultured in two rearing substrata (Cellulose Substrate (Control) - Coded Hs1 and Dry Neem and leaves and soil Substrate - Coded Hs2) were assessed using six wooden boxes stocked in triplicates at the rate of 92.7 g earthworms per box. The higher total final weight, weekly weight gain, relative growth rate, specific growth rate and survival of 400.6 g kg-1 of substrate, 25.7 g/week/substrate, 332.5, 0.76/day and 99.0% while the lower of 367.5 g kg-1 of substrate, 22.9 g/week, 296.4, 0.71/day and 98.0% were recorded in earthworm cultured in cellulose substrate and the soil substrate respectively. The proximate analyses, mineral compositions and amino acids indices were comparable to those of conventional fish meal. Based on the results of this study, the utilization of cellulose substrate is recommended for the culture of earthworm and the inclusion of the earthworm meal is guarantee as a reliable and nutritional dependable fish meal supplement.
  J.B. Edward and A.A.A. Ugwumba
  The physico-chemical parameters and plankton of Egbe Reservoir were studied from September 2004 to October 2006. Mean temperature, pH, conductivity, alkalinity, TSS, TDS and DO, BOD were 28.7°C±0.9, 8.3±0.3, 831±172.5 μS cm-1, 165.4±18.3, 0.06±0.1, 0.4±0.6, 7.8±2.4 and 5.1±1.6 mg L-1, respectively. Mean nitrate, phosphate and sulphate were 15.6±8.6, 42.5±19.4 and 72.3±mg L-1, respectively. About 35 genera of phytoplankton and 12 genera of zooplankton were identified in the reservoir. Diatoms dominated the plankton community making up 27.2% of the total plankton abundance by number while the Rotifers dominated the zooplankton, contributing 12.6% of the total plankton abundance. Diatoms showed the highest diversity (d = 1.77, H = 2.51) and are most evenly distributed (J = 0.93) among the phytoplankton while the Rotifers also showed the highest diversity (d = 0.70, H = 1.69) and even distribution (J = 0.94) among the zooplankton. Pollution indicator phytoplankton observed included Microcystis, Anabaena, Synedra, Melosira, Euglena, Phacus and Lepocinclis.
  I.K. Esenowo and A.A.A. Ugwumba
  A study on the composition and abundance of macrobenthos of Majidun river, Ikorodu, Lagos state was carried out from June, 2008 to May 2009 at 6 sampling stations along the river from its source to the mouth. The river is a multipurpose resource for artisanal fishing, transportation, sand mining and domestic uses. A total of 10,799 individuals of macrobenthos belonging to 18 genera in two Phyla, Mollusca and Anthropoda were recorded from the 6 sampling stations. Mollusca were represented by Bivalvia and Gastropoda, the most common species were the gastropods: Pachymelania aurita, P. fusca, P. fusca var. quadriserlata, Tympanotomus fuscatus var. radula, T. fuscatus fuscatus and Melanoides tuberculata. Arthropoda consisted mainly of caddis fly larva, Phryganea sp., the crabs: Sesarma huzardii, Cardisoma armatum and Callinectes latimanus and the prawn: Macrobrachium marobrachion. T. fuscatus var. radula was the most abundant species accounting for 20.17%, closely followed by P. aurita 19.58% while the least abundant, Phryganea sp., accounted for <0.1% of the total number of macrobenthos. Shannon-wiener diversity index indicated a maximum of 0.97 in mid river station (surrounded by mangrove trees) compared to the stations at the source of the river (0.88) and its mouth (0.87) where it flows into Lagos Lagoon. Macrobenthos abundance and diversity levels were significantly low.
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