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In-vitro study on effectiveness of Lactobacillus acidophilus on survival and growth rate of Litopenaeus vannamei
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Mehdi Heydarian   , Mehran Avakh Keysami , Gholamhosein Mohammadi |
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Abstract: (6052 Views) |
| In this study the effect of L. acidophillusand its suitable levelon survival and growth rate of juvenileLitopenaeusvannameiwas investigated during November 2010 to September 2011. L. acidophillus was isolated from shrimp intestine and added to commercial shrimp food. Six formulation diets were prepared by soaking shrimp feed in L. acidophillus solution to achieve 1010, 109, 108, 107 and 106 levels compared with a non-treated diet as control. After 60 days, the shrimp fed diet with 108 bacterial levels, showed a higher mean weight gain (593.45 g) or 170.29% increase in growth rate compared with the control. The mean weight gain showed a decreasing trend as the L. acidophilluslevel decreased from 108 to 106 and the L. acidophilluslevel increased from 108 to 1010 in the diets. There was significant difference in weight gain, feed intake, daily growth and feed conversion ratio (FCR) between treated and the control group (P<0.05). There was significant difference between experimental groups and the control in survival rate (P<0.05) but no significant difference in water quality and biochemical composition among treated and control groups (P>0.05). Clearly, treating with L.acidophillusappeared to enhance growth and survival rate of Litopenaeusvannamei. It was concluded that the tested strain may be used as probiotics for Litopenaeusvannamei in aquaculture at a level of 108L. acidophillusin to the prawn feed. |
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| Keywords: Lactobacillus acidophillus, Litopenaeus vannamei, Probiotic, Survival |
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Full-Text [PDF 770 kb]
(2532 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2014/01/21 | Accepted: 2014/01/21 | Published: 2014/01/21
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