International Journal of Aquaculture, 2017, Vol.7, No.6, 42
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highest value was jointly from OGM2 and OGM4 diets, while the lowest percentage survival was from fish fed
OGM6 diet as shown in (Table 2).
Table 2 Growth performance of
Clarias gariepinus
fed
Occimum gratissimum
additive meal for 84 days
PARAMETERS
OGM1
OGM2
OGM3
OGM4
OGM5
OGM6
Initial total weight (g)
218.67±0.44
217.83±0.44
218.17±0.44
218.17±0.17
218.67±0.33 219.00±0.00
Mean initial weight
(g/fish)
10.94±0.02
10.98±0.02
10.91±0.02
10.91±0.01
10.93±0.02
10.95±0.00
Total final weight (g)
601.57±1.23
d
916.67±17.98
a
869.25±7.99
b
765.92±1.95
c
152.42±4.51
e
137.92±2.97
e
Mean final weight (g/fish) 37.60±1.33
d
50.93±1.00
b
54.33±0.50
a
42.55±0.11
c
10.98±0.32
e
10.61±0.23
e
Total weight gain (g)
382.90±20.80
d
698.83±17.54
a
651.08±7.77
b
547.75±2.10
c
-66.58±4.51
e
-81.08±2.97
e
Mean weight gain (g/fish) 23.93±1.30
c
38.83±0.97
a
40.69±0.49
a
30.43±0.12
b
-4.76±0.32
d
-6.22±0.24
d
Specific growth rate (%) 0.52±0.02
b
0.70±0.05
a
0.71±0.00
a
0.65±0.00
a
-0.19±0.02
c
-0.24±0.01
c
Relative growth rate
(%/fish)
175.07±9.18
d
320.78±7.41
a
298.43±3.32
b
251.07±1.14
c
-30.30±1.96
e
-37.02±1.36
e
Fish productivity Index
690.08±0.99
1876.42±28.07 1581.87±38.73 1437.50±80.36
-25.03±1.10 -35.87±1.49
Total feed intake
1701.18±27.69
c
2344.64±35.74
a
2146.26±52.05
b
1889.96±100.46
c
1203.89±5.49
e
1195.49±48.97
e
Total protein intake
707.35±11.51
c
940.70±12.22
a
930.70±12.22
a
782.06±41.57
a
492.03±15.60
e
489.18±20.02
e
Feed conversion ratio
4.44±0.07
c
3.35±0.09
c
3.30±6.08
c
3.45±0.18
c
18.08±0.57
a
14.74±0.60
b
Protein efficiency ratio
0.54±0.01
b
0.74±0.02
a
0.75±0.02
a
0.70±0.04
a
-0.13±0.00
c
-0.17±0.01
c
Initial condition factor
0.48±0.01
b
0.63±0.02
a
0.51±0.02
b
0.50±0.03
b
0.53±0.03
b
0.49±0.01
b
Final condition factor
0.69±0.03
ab
0.62±0.03
bc
0.67±0.06
a
0.61±0.04
bc
0.52±0.03
c
0.48±0.04
bc
Number cropped
16.00±0.00
b
18.00±0.00
a
16.00±0.00
b
18.00±0.00
a
14.00±0.00
c
13.00±0.00
d
Survival (%)
80.00±0.00
b
90.00±0.00
a
80.00±0.00
b
90.00±0.00
a
70.00±0.00
c
65.00±0.00
d
Number of dead fish
4
2
4
2
2
7
Note: Data mean values with different superscripts in each row are significantly different (P>0.05), while without data are
insignificantly different P>0.05
Total feed intake ranged from 1701.18±27.69 g to 2344.01±35.74 g within the treatments, the highest value was
from OGM3 diet and the lowest value was from the OGM6 diet. The fish fed the OGM2, OGM3 diets had
significantly higher (p<0.05) total feed intake than the OGM4, OGM1 diets, which were significantly different
from OGM5 and OGM6 diets. Total protein intakes ranged from 707.35±11.51 to 940.70±12.22 g within the
treatments, and follow the same trend as total feed intake (Table 2). The feed conversion ratio values ranged from
4.44±0.07 to 18.08±0.57 across the treatments. The highest value was from the fish fed the OGM5 diet and the
lowest was from OGM3 diet. The fish fed the OGM5 diet had significantly higher (p<0.05) feed conversion ratio
than OGM6, which was significantly different from other diets (Table 2). Protein efficiency rate values ranged
from -0.17±0.01 to 0.75±0.02 within the treatments. The highest value was from fish fed OGM3 diet and the
lowest was from fish fed OGM6 diet. The fish fed OGM6, OGM5, OGM4 diets had significantly higher (p<0.05)
protein efficiency rate than OGM3 which was significantly different from the OGM2 and OGM1 diets
respectively (Table 2).
The result of the production cost of experimental diet of
Ocimum gratissimum
(OGM) meals (Table 3) showed
that the highest profit index 5.72 was from OGM3 diet and the least 1.53 was from OGM6 diet. The highest net
profit was 114.97 was from OGM2, followed closely by 94.46 from OGM3 and the least value of -273.86 was
from OGM6 diet.
4 Discussions
The fact that weight gain was not reported in all the treatments was an indication that the fish did not responded
positively and effectively to all the diets. The higher inclusions of the diet ≥ OGM5 had gross consequence on the
growth and energy supply of
Clarias gariepinus.
This is contrary to the reported adequate provision for growth
