The effects of green tea extract additive feeds on the growth performance and survival rate of the giant freshwater prawn (Macrobrachium rosenbergii)

This study was designed to examine the effects of green tea extract (GTE) additive feeds on the growth performance in the giant freshwater prawn. Two separate trials were determined by using two different stages of prawn for initial stocking, one was the small post larva (PL10), the other was 5.6 g prawn. A Completely Randomized Design was applied in this study. The small post larva (PL10) were raised in cement tanks(1x1.5 m2). Three treatments with three replications each were performed applied as following: treatment 1 (control) was the commercial pellet feed; treatment 2 and 3 were feeds with 1% and 2% green tea extract, respectively. This assay was run for 8 weeks. The prawns were randomly selected for weight determination every week. The result showed there was no significant difference in the specific growth rate and survival (P > 0.05) but the feed conversion ratio was reduced in prawn fed with green tea extracts (P 0.05). Therefore, green tea extract has potential as growth enhancer in giant freshwater prawn culture

Trichodinidae in commercial fish in South America.

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