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Research Journal of the University of Ruhuna, Sri Lanka- Rohana 13, 2021
season, availability of feeds, and other water quality parameters (Khallaf et al.,

2003).

The highest condition factor recorded in the fish in T1 treatment and control tanks

indicates that both Sesbania grandiflora containing diet and control diet have
provided better environments and nutrients for the growth of fish than T2 and T3

treated tanks.

The highest mean weight and length increments in fish were recorded from the fish

in control tanks. Of the three treatments, the highest mean weight and length
increments were recorded from the fish fed with A. sativum diets. The highest mean

th
weight and length increments were recorded from garlic-treated fish at 10 week
during the experimental period.

Shalaby et al. (2006) have reported a significant increase in weight gain, feed
efficiency, Protein Efficiency Ratio (PER) and Specific Growth Rate (SGR) in Nile

tilapia which were fed with a diet containing garlic powder of 30.0 g/kg in diet.
Similarly, Diab et al. (2002) have mentioned feeding a diet with 2.5% garlic/kg diet

results in the highest growth performance in O. niloticus. Also, Abou-Zeid (2002)
has found a positive improvement in biomass and specific growth rate in O. niloticus

with garlic supplementation. Metwally (2009) also found that the best performance

was obtained in Nile tilapia fed with garlic powder in 32 g/kg diet.

Hossain et al. (2002) carried out a feeding trial in a warm water recirculation system
to evaluate the nutritive value of Sesbania aculeata seed meal as a possible fish meal

substitute for the diet of tilapia. Sesbania seed meal was included in diets at various

levels and-fish fed diets containing higher levels (>9.7%) of Sesbania meal had
shown significantly higher whole-body moisture, lower lipid and gross energy

content. The lower growth performance of fish-fed diets containing higher levels of
Sesbania meal is thought to result from the presence of tannins, saponin and the

non-starch polysaccharide content in the seeds.

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