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International Journal of Fisheries and Aquatic Studies
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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2017, Vol. 5, Issue 5, Part D

Effect of duckweed by replacing soybean in fish feed on growth performance of Grass carp (Ctenopharyngodon idella) and Silver carp (Hypophthalmichthys molitrix)


Author(s): Sadar Aslam and Amina Zuberi

Abstract: A 90-day feeding trial was carried out to determine and compare the effects of duckweed (Lemna minor) and soybean (Glycine max) meals as a source of protein on the growth performance, growth hormone levels and proximate composition of Grass carp, Ctenopharyngodon idella (Valenciennes, 1844) and Silver carp, Hypophthalmichthys molitrix (Valenciennes, 1844) in monoculture as well as polyculture system. In the present study, 35% protein practical diets, FSBM (feed containing 21% soybean meal) and FDW (feed having 21% duckweed) were prepared as a source of protein. At the end of the experiment, Grass carp showed a non-significantly higher growth rate as compared to Silver carp when fed FDW while Silver carp showed a higher growth rate in response to FSBM diet in both culture systems. A similar trend was observed in Percentage weight gain (% WG), specific growth rate (SGR%) and feed conversion efficiency (FCE%). The Grass carp and Silver carp fed with FDW and FSBM diets showed significantly (P<0.05) higher growth hormone levels in polyculture as compare to monoculture system. In this study, proximate composition analysis showed approximately similar composition of both diets. It can be concluded from this study, that duckweed can be used as a protein source in fish feed for the selected fish species.

Pages: 278-282  |  482 Views  40 Downloads

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How to cite this article:
Sadar Aslam and Amina Zuberi. Effect of duckweed by replacing soybean in fish feed on growth performance of Grass carp (Ctenopharyngodon idella) and Silver carp (Hypophthalmichthys molitrix). International Journal of Fisheries and Aquatic Studies. 2017; 5(5): 278-282.
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