In order to explore the potential of cage culture of common carp, a series of experiments on
size, feeding and rearing management of common carp in cages were carried out since 1997
for three years in the Lakes Phewa and Begnas of Pokhara Valley. The highest n1ean
absolute daily weight gain (2.36 g.daf1
} was of large size fish stocked (122.6 g) and the
small size .fish stocked (27.8 g) gain weight at the rate of 1.63 g.day-1
. The mean yields were
2.1 and 4.0 kg.m3, respectively, for small and large size fish stocked. Cage coveredfrom all
sides improved recove1y rate by 16.8 andfeed utilization by 20% but/ower growth rate by
3.1 % than fi·om the normal cage. Common carp fed on 20%, 30% and 40% crude protein
contained diet yielded 4.1, 4.9 and 5.1 kg.m3
, respectively. Net weight gain offishfed on
20% protein contained diet was significantly poor (P<O.Ol) compared to the fish fed on
30% and 40% protein .contained diets.
The highest growth rate (0.37 g.day-1
) was in lowest stocking density (0.25 kg.nl-LDI) and
the growth rate was decreased with an increasing density of large size fingerling (LD
group). Similar trend of density related growth rate demonstrated by the small size
fingerling (SD group) with highest growth rate (0.09 g.day-1) for 0.2 kg.m3 (SDI). The
highest yield was 0.46 kg.m3 for loading rate of 0. 75 kg.m3 (LD3) and the net yield ·
decreased proportionally with decreased loading rate. The net yield ranged was between
0.22-0.23 kg.m3 for SD group.

In order to explore the potential of cage culture of common carp, a series of experiments on
size, feeding and rearing management of common carp in cages were carried out since 1997
for three years in the Lakes Phewa and Begnas of Pokhara Valley. The highest n1ean
absolute daily weight gain (2.36 g.daf1
} was of large size fish stocked (122.6 g) and the
small size .fish stocked (27.8 g) gain weight at the rate of 1.63 g.day-1
. The mean yields were
2.1 and 4.0 kg.m3, respectively, for small and large size fish stocked. Cage coveredfrom all
sides improved recove1y rate by 16.8 andfeed utilization by 20% but/ower growth rate by
3.1 % than fi·om the normal cage. Common carp fed on 20%, 30% and 40% crude protein
contained diet yielded 4.1, 4.9 and 5.1 kg.m3
, respectively. Net weight gain offishfed on
20% protein contained diet was significantly poor (P<O.Ol) compared to the fish fed on
30% and 40% protein .contained diets.
The highest growth rate (0.37 g.day-1
) was in lowest stocking density (0.25 kg.nl-LDI) and
the growth rate was decreased with an increasing density of large size fingerling (LD
group). Similar trend of density related growth rate demonstrated by the small size
fingerling (SD group) with highest growth rate (0.09 g.day-1) for 0.2 kg.m3 (SDI). The
highest yield was 0.46 kg.m3 for loading rate of 0. 75 kg.m3 (LD3) and the net yield ·
decreased proportionally with decreased loading rate. The net yield ranged was between
0.22-0.23 kg.m3 for SD group.