Nutrition of Common Freshwater Ornamental Fishes

Table 19. Growth and nutrient utilization of Trichogaster trichopterus fed
different experimental diets.
Nutritional
indices
Initial weight (g)
Final weight (g)
Weight gain
Experimental diets
Fish meal protein replaced by
surimi by-product protein (%)
0.0 12.5 25.0 50.0 75.0 100.0
(C) (D-l) (D-2) (D-3) (D-4) (D-5)
4.74 4.86 4.84 4.77 4.74 4.80
±0.02a ±O.Ola ±0.08 a ±0.04 a ±0.04 a ±0.08 a
11.55 11.75 11.59 11.46 10.05 9.63
±0.15 a ±0.05 a ±0.11 a ±0.10a ±0.13 b ±0.09 c
6.81 6.88 6.74 6.69 5.31 4.83
±0.13 a ±0.04 a ±0.03a ±0.06 a ±O.10 b ±0.06 c
Feed:Gain 1.34 1.36 1.39 1.41 1.56 1.65
±0.03 a ±0.01 a ±0.03 a ±0.03 a ±0.03 b ±0.03 c
SGR (% day-I) 1.98 1.96 1.94 1.95 1.66 1.55
PER
±0.02 a ±0.01 a ±0.02 a ±O.OOa ±0.01 b ±O.02 c
2.13 2.06 2.03 2.02 1.80 1.73
±0.04 a ±0.02 a ±O.04 a ±0.04 a ±0.04 b ±O.04 c
HSI 1.76 1.81 1.78 1.82 1.79 1.77
±0.03 a ±O.02 a ±0.03 a ±0.02 a ±0.04 a ±0.05 a
VSI
7.38 7.45 7.48 7.51 7.56 7.49
±0.07 a ±0.06 a ±0.03 a ±0.04 a ±0.07 a ±0.06 a
Mean values with same superscripts in each row arc not significant (p>0.05).
Values arc means of three replicates in each experimental diet ± SE.
SGR (Specific growth rate) = In final weight- In initial weight/Experiment duration (days);
Feed Gain = Total feed intake (dry weight)rrotal.live weight gain;
Protein efficiency ratio (PER) = Total live weight gainrfotal protein in take;
Hepatosomatie index (HSI) = Liver weight/Body weight X 100;
Viseerosomatie index (VSI) = Weight of the whole digestive tract/Body weight X 100