2. Materials and Methods
Two potential seeds of nutritional importance include flaxseed
and garden cress seed were selected to design feed study on
body-weight, biochemical and histological parameters of
common carp fishes. The study was planned for twenty five
days of feeding trials with rice bran as control diet. The NL-115 variety of FL was purchased from University of
Agricultural Sciences, Raichur, India. The GC and RB were
collected from the local market. Upon arrival, the samples
were cleaned and stored at 4 °C until further use. All
chemicals for biochemical analyses were of analytical grade
purchased from authorized dealers (India).
2.1 Methodology
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 durin