Fish and Experimental Conditions
16 freshwater common carp fish between 118 ± 2g were
procured from the State Fisheries Department, Bhadra
Reservoir Project, Shimoga, Karnataka, India, use for this
study. Upon arrival, fish were washed with 0.1 % KMnO4
solution to avoid dermal infection. All the precautionary
measures were followed for maintaining the fish
[2]
. Prior to
the start of the experiment, fish were individually weighed and
allowed to acclimatize for 2 weeks at 24 ± 1 °C in the
experimental semi-intensive aquaria (3 sq.mtr) containing
dechlorinated tap water of the quality used in the test. The
aquarium was fitted with waste filtration facility. Compressed
air was used to maintain oxygen supply. The fish were
randomly assigned to 4 different groups based on 3
experimental diets and 1 control diet. The fish were fed
regularly with commercial fish food pellets (kind gift by State
Fisheries Department) during acclimatization. Fish were fed
twice daily at approximately 07.00 and 17.00 h to apparent
satiation for a period of 25 days. Regular monitor of water
quality parameters was carried out. Water supplied
continuously via semi re-circulating system and a 12-h and 12-h of night and day photoperiod was maintained during