Effect of dietary supplementation of brewers yeast

Authors: Nilnaj Chaitanawisuti Chatchaleeya Choeychom Somkiat Piyatiratitivorakul

Publish Date: 2010/08/18

Volume: 19, Issue: 3, Pages: 489-496

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Abstract

This study was undertaken to evaluate the use of brewers yeast and nucleotides as a growth promoter and to provide vibriosis resistance for the juveniles of gastropod spotted babylon Babylonia areolata Juvenile spotted babylon 03 g initial weight were randomly distributed at a density of 50 snails in 45L aquaria and fed a basic diet 40 crude protein containing two incremental levels of 1 and 2 brewers yeast and nucleotides singularly for 4 months After the feeding trial snails from each treatment were challenged by pathogenic bacteria Vibrio alginolyticus given by intramuscular injection and kept under observation for 5 days to record clinical signs and daily mortality rates Results indicated that the snails fed with diets supplemented with brewers yeast or nucleotides exhibited significantly greater growth than those fed the basic diet P  005 and significantly better food conversion ratios compared to snails fed the basic diet P  005 These results indicated that dietary supplementation of brewers yeast or nucleotides at least at the tested dosages enhanced spotted babylon growth Supplementing the diet with 1 brewers yeast promises to provide appropriate resistance to V alginolyticusThis study was supported by the National Research Council of Thailand NRCT who provided funding for this research in the fiscal years 2005–2008 We are especially grateful to Associate Professor Dr Somkiat Piyatiratitivorakul Faculty of Science Chulalongkorn University and Professor Dr Yutaka Natsukari Faculty of Fisheries Nagasaki University for their encouragement suggestions and critical reading of the manuscript

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