International Journal of Marine Science 2016, Vol.6, No.25, 1-8
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Table 1 Composition, water stability and biochemical composition of formulated diets
Composition
Experimental diet (g/kg)
Control diet
(g/kg)
Dry fish meal
Ground nut oil cake
Coconut oil cake
Soya bean meal
Green gram
Tapioca
Egg albumin
Cod liver oil
Seaweed powder
Vitamin mix
Table salt
12
25
13
25
10
3
2
3
5
1
1
14
25
15
25
10
3
3
3
-
1
1
Total
100
100
Evaluation of water stability (%) in control and experimental diets
Hours
Control
Experiment
1
2
4
65.27
64.19
58.52
67.63
61.77
59.69
Biochemical composition of formulated feeds
Biochemical Constituents
Control
(Mean ±SE)
Experiment
(Mean ±SE)
Protein (%)
Lipid (%)
Carbohydrate (%)
67.8±3.1
9.7±1.2
35±1.1
62±2.01
11.6±0.4
38.82±2.9
2.5 Experimental fish, rearing condition and feeding regime
The fish fingerlings were fed twice a day for about 30 days. The feed was given at 10% of fish body weight. The
unconsumed feed, if any, was siphoned out 6 hrs after feeding. Likewise, faecal matter was also siphoned out prior
to the next feeding.
2.6 Growth and feed efficiency parameters
The growth parameters of the experimental fish fingerlings were assessed by measuring their body weight at 10
days interval. The following response variables were determined from the experimental tank:
Weight gain (%) =100×(Final weight - Initial weight) / Initial weight
Specific growth rate (SGR) (% /day) = 100×(Final weight - Initial weight) / Days of experiment
Feed Conversion Ratio (FCR) (%) =100×[Feed Intake (FI)] / Weight Gain (WG)
Survival Rate (%) =100×(Number of surviving fish) / Number of stocking fish
