Effects of graded activated charcoal in rice husk diets for mud catfish, Clarias gariepinus juveniles (Teleostei: Clariidae)
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Adesola, T. T.
Iranian Journal of Ichthyology
This study investigated the growth performance, nutrients utilization and haematology of Clarias gariepinus juveniles fed with graded activated charcoal (AC) in rice husk (RH) diet. Eight diets were formulated; control diet 1 (without RH and AC), control diet 2 (+AC), diet 3 (2.5%RH), diet 4 (2.5%RH+AC), diet 5 (5.0%RH), diet 6 (5.0%RH+AC), diet 7 (7.5% RH), diet 8 (7.5%RH+AC). Diets were fed to triplicate groups of ten fish per tank thrice daily to satiation for eight weeks. Fish fed Diet 4 recorded highest values for mean weight gain (MWG) (75.71±1.76g), Specific Growth Rate or SGR (2.40±0.03%/day) and Protein E f f i c i e n c y R a t i o ( PER) (3.22±0.15) while fish fed Diet 7 had the least values for Mean Weight Gain or MWG (59.50±1.21g), SGR (2.09±0.03g) and PER (2.39±0.10). The AFI didn’t record significant difference (P>0.05) while FCR had significant difference (P<0.05) across diets, with Diet 4 having the best value for Feed Conversion Ratio or FCR (0.86±0.04). Diets of RH lowered the cholesterol,Packed Cell Volume (PCV) and Haemoglobin (Hb), levels in the experimental fish though, the inclusion of AC to the test diets resulted in a non-significant increase in the levels of these parameters. The values of White Blood Cells (WBC) and White Blood Cells (RBC) did not show significant differences (P>0.05) amongst diets however, diets 1 and 2 recorded the highest values for WBC (14500±707.11) and RBC (6.15±0.91) with the least values (9000±2828.43, 5.15±0.21, respectively) for these parameters recorded with diets 3 and 7. The improved growth recorded at 2.5% inclusion level of AC suggests that activated charcoal could favourably be added to the feed of C. gariepinus juveniles.
Growth performance , Haematology , Nutrients utilization catfish , Research Subject Categories::NATURAL SCIENCES
Aderolu, A.Z., Lawal, M.O. and Adesola, T.T. (2016). Effects of graded activated charcoal in rice husk diets for mud catfish, Clarias gariepinus juveniles (Teleostei: Clariidae). Iran. J. Ichthyol. 3(3): 203–209.