Effect of duckweed (Lemna minor L.) supplementation in diet on growth of red tilapia (Oreochromis niloticus x O. mossambicus)

Kittisak Puycha, Supatchaya Tanee and Ratchataporn Lunsin

ABSTRACT: The objective of this study was to investigate the effect of duckweed (Lemna minor L.) supplementation in 30% protein and 2,700 Kcal/Kg digestible energy feed on growth of red tilapia (Oreochromis niloticus x O. mossambicus) at 0, 5, 10 and 15%, respectively. Red tilapia, with an average initial weight of 2.93 ± 0.01 grams was randomized assign to a completely randomized design (CRD) and the experimental was run for 8 weeks. Results showed that length, body weight, Average daily gain, specific growth rate, survival rate and feed conversion ratio (FCR) were not significantly different among treatments (P>0.05). Based on this study, duckweed could supplement in the diet for red tilapia up to 15% without any effect on growth and survival rate. Moreover, it could reduce the cost of feed production of red tilapia.

Keywords: Red tilapia, Duckweed, Growth

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