The effectiveness of duckweed and rice bran as a low cost supplementary feed was
compared through a six months production trial of rajpunti (Barbodes gonionotus) with
carps. Six earthen ponds of 360 m2 each were used for the trial. Three ponds received
duckweed, while the other three received rice bran as supplementary feed. Fish
biomass after six months of rearing increased to an average of 2,056 kg/ha in ponds
which received duck weed and 2,056 kg/ha in rice bran treated ponds. The net profit
with duckweed and rice bran worked out to Tk. 69,752 and Tk. 73,480 kg/ha,
respectively. This study revealed that duckweed is a low cost supplementary feed,
particularly for farmers with limited income.