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Articles by M.A. Adewolu
Total Records ( 5 ) for M.A. Adewolu
  M.A. Adewolu and A.A. Adamson
  The aim of this study was to evaluate the potentials of Amaranthus spinosus leaf meal as dietary protein source for Clarias gariepinus fingerlings. An 8 week feeding trial was conducted in plastic aquaria tanks of 50 L capacity. Amaranthus spinosus leaf meal was included in the practical diets at 0, 5, 10, 15 and 20% designated as diets 1, 2, 3, 4 and 5, respectively. Diet 1 without A. spinosus serves as the control. All diets were made isonitrogenous (36% CP) and isocaloric. Fingerlings of initial mean weight of 5.00±0.37 g were fed on allotted diet at 3% b.wt. day-1 for 56 days. Specific Growth Rate (SGR) was highest with a value of 1.95±0.69 in diet 1 while it was lowest in diet 5 with a value of 0.20±0.24, SGR values in diet 1 (control) and diet 2 were similar and significantly (p<0.05) better than the other dietary treatments. Fish fed diets 3, 4 and 5 showed significantly reduced growth performance and feed utilization compared to those fed with diets 1 and 2. FCR was lowest in fish fed diet 1 with a value of 1.72±0.56 and highest in fish fed with diet 5, however, FCR values of diets 1 and 2 were not significantly (p>0.05) different from each other but were significantly (p<0.05) different from other diets. This study indicates that up to 5% A. spinosus leaf meal could be included in the practical diet of Clarias gariepinus without affecting growth and feed utilization.
  M.A. Adewolu and A.J. Adoti
  A-56 day growth trial was conducted to investigate the effect of mixed feeding schedules with different dietary crude protein levels on growth and feed utilization of fingerlings of Clarias gariepinus. Three experimental diets of 25, 30 and 35% crude protein designated as Low Protein (LP), Medium Protein (MP) and High Protein (HP) diets, respectively were prepared using locally available feed ingredients. Four different feeding schedules of high-protein diet continuously (HP), medium-protein diet continuously (MP), low-protein diet continuously (LP) and mixed feeding of 1-day low-protein/1-day high-protein (1LP/1HP) were tested. Fingerlings of mean weight 1.24±0.11 g were stocked in 12 plastic aquaria tanks of 65 L in capacity at 10 fish tank-1. Fish were fed twice daily at 3% b.wt. day-1. Fish fed continuously on HP had significantly (p<0.05) highest growth rate and feed utilization among treatments. However, there were no significant differences (p>0.05) in the growth rates and feed utilization of fish fed 1-day low-protein/1-day high-protein (1LP/1HP) and those fed continuously on MP. Fish fed continuously on LP had the least growth and feed utilization. This study showed that feeding C. gariepinus continuously with 35% CP diet is more economical than the mixed feeding schedule with LP and HP diets.
  K.A. Fakoya , F.G. Owodeinde , S.L. Akintola , M.A. Adewolu , M.A. Abass and P.E. Ndimele
  The importance of seaweeds cuts across various environmental, ecologic, socio-economic benefits and services as food for man, in the phycocolloids and expanding phycosupplement industries, as sink for excess carbon dioxide and excess nutrients; for sustainable energy generation and as fossil fuel substitutes. In view of this, seaweeds could become an important economic niche for Nigeria and other coastal African countries provided adequate research is undertaken in studying their diversity, biochemical compositions and potentials for culture in order to harness the numerous opportunities which can be derived.
  J.I. Agboola , M.A. Adewolu and E.O. Lawson
  The Millennium Ecosystem Assessment (MA) has identified climate change as one of the main drivers of change in aquatic biodiversity and ecosystem with a very rapid increase of the impact. Recently, the Intergovernmental Panel on Climate Change (IPCC) concluded that climate change is, without doubt, occurring and that the Earth is warming. There are some climate change winners, but scientists predict that the overwhelming effect of climate change upon biodiversity including fisheries will be damaging. The nexus between climate change, fisheries and phytoplankton is particularly strong. This study considers this ‘non-fishing effects’ on fish abundance and distribution by exploring the various roles of phytoplankton in climate change and fisheries productivity. It then discusses the need to improve our knowledge of phytoplankton as mechanisms linking climate to ecosystem changes such as fisheries productivity.
  M.A. Adewolu
  An 8-week feeding trial was conducted to evaluate the potential of sweet potato (Ipomoea batatas) leaf meal as dietary protein source in the diet of Tilapia zilli fingerlings. Five isonitrogenous diets of 30% crude protein were formulated to contain 0, 5, 10, 15 and 20% sweet potato leaf meal (Diets 1-5) to partially replace other protein ingredients in the tilapia diet. The diet containing 0% leaf meal served as the control. Tilapia zilli fingerlings were reared in 50L circular plastic tanks maintained in a flow-through system. Each dietary treatment was tested in triplicate groups of 10 fingerlings per tank. The results of the growth and nutrient utilization responses show that there were no significant (p>0.05) differences among the fish fed diets 1-4 (0-15% sweet potato leaf meal) but were significantly (p<0.05) different from fish fed on diet 5 (20% sweet potato leaf meal) which had lower growth and feed utilization values. There were no significant (p>0.05) differences in the carcass composition of Tilapia zilli fingerlings fed on experimental diets. The present findings show that sweet potato leaf meal has good potential for use as one of the protein sources in Tilapia zilli diet up to 15% level without compromising growth.
 
 
 
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