Standardization of Stocking Density of Cyprinus Carpio Var. Koi (Linnaeus, 1758), Spawn Reared In Non- Aerated System

Abstract

In India, ornamental fish breeding and culture
without aeration in rural areas is common. An
experiment was conducted for 45 days to standardise
the stocking density of koi carp spawn rearing (4
day old, length 7.58 ± 0.10 mm, weight 4.56 ± 0.98
mg) in ferrocement tanks (300 l) without providing
aeration. These spawn were fed with mixed
zooplankton ad libitum. There were three treatments
with different stocking densities viz., 2 number l-1
(T1), 4 number l-1 (T2) and 6 number l-1 (T3)
respectively. In present study, significantly higher
(p<0.05) growth and survival rate was found in T1
compare to other treatments. There was no significant
difference (p>0.05) in water quality parameters
in different treatments. The results of present study
concludes that stocking density of koi carp 2 number
l-1 spawn could be suggested for rearing to fry stage
without aeration.