Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/337
Title: YIELD AND ECONOMIC RETURNS OF CLARIAS GARIEPINUS AND OREOCHROMIS NILOTICUS FED COMMERCIAL DIET (DURANTE) IN SEMI-INTENSIVE CULTURE SYSTEM
Authors: OKONJI, V. A.
ASEMOTA, E.
ALIU, B. S.
Keywords: Clarias gariepinus
Oreochromis niloticus
Yield
Economic Returns
Issue Date: 2012
Publisher: JOURNAL OF AGRICULTURE, FORESTRY AND FISHERIES
Series/Report no.: 13;
Abstract: Growth, yield and economic performance of Clarias gariepinus (Africa Catfish) and Oreochronis niloticus (Tilapia) fed commercial fish feed (Durante), cultured in semi-intensive system for 180 days was investigated. Two outdoor concrete tanks measuring 20m2 each was partitioned into four (4) equal units of about 4m2 were used for culture with each fish species replicated twice. C. gariepinus and O. niloticus were stocked at the rate of 16 fishes/m2 (i.e. 80 fishes per tank) and 8 fishes/m2 (i.e. 40 fishes per tank) respectively. The stocked fishes were fed commercial diet (Durante) till satiation twice daily at l0.00hrs and I6.00hrs. Water quality parameters were monitored and parameters such as water temperature, transparency, pH, dissolved oxygen, and dissolved nutrient; Nitrate (NO2) and phosphate (PO3-4) were measured and found to be within the desired limit for fish rearing. Growth and yield parameters such as weight gain, survival, size distribution, feed conversion ratio and total yield were measured. Also economics parameters such as total revenue, gross profit, cost/benefit ratio were measured. There was a significant difference in weight gain (P < 0.05) between the two fish species. The fish survival rate of 73.8% and 147.55%, feed conversion ratio of 0.820 and 1.62, mean size distribution of 15.2% ,32.1%,% 52.7% and 100%, 0%, 0% small medium and big size fish for C. gariepinus and O.niloticus respectively, yield of 55.08kg/4m2/180days 20 and 7.10kg/4m2/180days, total revenue of N55,075 and N4,973.5, gross income of N20.075 and- N6,826.5 (deficit), Benefit/cost ratio of N1.8 and – N0.58 was recorded for Clarias gariepinus (Catfish) and Oreochromis niloticus (Tilapia) respectively. C. gariepinus (Catfish) significantly (P < 0.05) performed better than O. niloticus (Tilapia) in all the parameters recorded except fish survival.
URI: http://hdl.handle.net/123456789/337
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