Effect of Marigold Oleoresin on Growth, Survival and Pigmentation in Orange Chromide, Etroplus maculatus (Bloch, 1795)
Effect of Marigold Oleoresin on Growth, Survival and Pigmentation in Orange Chromide, Etroplus maculatus (Bloch, 1795)
Date
2014
Authors
Jagadeesh, T.D
Murthy, H. Shivananda
Swain, S. Himanshu
Chethan, N
. Manjunatha, A.R
Baglodi, Varuna
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
The study was conducted to evaluate the effect of
marigold oleoresin on growth, survival and total
carotenoid content in muscle tissue of Etroplus
maculatus. Fish with size group ranging from 0.60
g to 0.62 g were used for the study. The study was
carried out in triplicate groups for a period of 45
days. Fishes were stocked at the rate of 15 per tank.
Three test diets namely T1, T2 and T3 with 30%
protein level were formulated. Diet T1 had 60 ppm,
T2 had 120 ppm and T3 had 180 ppm marigold
oleoresin, and diet without marigold oleoresin
supplementation served as control (T0). There was
no significant effect in survival rate and feed
conversion ratio of the fish (p>0.05). However, 60
ppm marigold oleoresin fed fishes showed increased
weight of 1.04±0.08 g, lower feed conversion ratio of
1.53±0.05 and higher survival rate (82.14%) than the
other treatment groups. The fishes fed with 60 ppm
marigold oleoresin incorporated diet showed significantly
higher specific growth rate of 1.36±0.21%,
relative growth rate of 69.10±3.4% and the absolute
growth rate of 0.42±0.02 g. The body colouration and
total carotenoid concentration of muscle tissue
(4.62±0.02 μg g-1) was significantly higher in fish fed
with 60 ppm marigold oleoresin diet. Among the
tested doses, 60 ppm marigold oleoresin showed
better results than 120 ppm and 180 ppm marigold
oleoresin inclusion in the fish diet.
Description
Keywords
Marigold oleoresin, Etroplus maculatus, carotenoid, feed convertion ratio
Citation
Fishery Tech 51(1):25-30