Business Managment

In: Business and Management

Submitted By shivaesr
Words 3477
Pages 14
African Journal of Biotechnology Vol. 8 (14), pp. 3369-3376, 20 July, 2009
Available online at http://www.academicjournals.org/AJB
ISSN 1684–5315 © 2009 Academic Journals

Full Length Research Paper

Effect of Bacillus subtilis on the growth and survival rate of shrimp (Litopenaeus vannamei)
Hadi Zokaei Far1, Che Roos B. Saad1*, Hassan Mohd Daud2, Sharr Azni Harmin1 and Shahram
Shakibazadeh1
1

Department of Aquaculture, Faculty of Agriculture, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, university Putra Malaysia, 43400 Serdang,
Selangor, Malaysia.

2

Accepted 17 March, 2009

The effect of Bacillus subtilis, isolated from digestive tract of Macrobrachium rosenbergii was investigated on growth and survival rate of Litopenaeus vannamei during 60 days of culture. Sixteen aquaria with four replicates were used for treatments and controls. Treatment groups were consisted of
) shrimp fed diet with B. subtilis (T1), and ii) shrimp fed diet mixed with B. subtilis and commercial probiotic (T2). Control groups were consisted of ) shrimp fed diet with commercial probiotic as positive control, and ii) shrimp fed unaltered diet as negative control. Results showed that B. subtilis was proliferated in digestive tract of treated shrimps, and the number of Vibrio spp. was reduced in digestive tract during the cultural period. Survival rate, 75.5± 4.62 %, and yields of shrimps, 190.00 ±
13.13 g, treated with B. subtilis were significantly greater (P 0.05) was found between aquaria with or without the addition of bacterial supplement for the other parameters; final mean weight, SGR,
FCR, weight gain, and daily gain (Table 1). It seemed that shrimps treated in T1 sacrificed some of the growth performance due to be higher density (P < 0.05) compared to other…...

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