Table 9. Comparison of pond-culture of juvenile grass carp fed different diets
		Type of feed
	Unit	Raw rapeseed	Broken pellets	Pellets
No. of juveniles of grass carp	No.	15,900	26,000	30,500
Biomass of grass carp	kg	668	1,555	18,500
Individual body weight of grass carp	g	42	59	61
Mortality of grass carp	%	39	65	76
Biomass of silver & bighead carp	kg	755	675	680
Feed	kg	3,500	2,240	2,520
FCR for feeding fish		5.09	1.44	1.36
PER		0.52	2.28	2.28
FCR of the pond		2.46	1	1
Feed cost	USD	444	628	724
Other input cost	USD	494	494	494
Income from grass carp	USD	625	1454	1730
Income from silver and bighead carp	USD	222	198	200
Net profit	Yuan	-87	530	712
Data source: Shao et al. (2004)