Journal of Environmental Biology

Effect of culture intensity and probiotics application on microbiological and environmental parameters in Litopenaeus vannamei culture ponds

Prasanna Kumar Patil¹*, M. Muralidhar¹, Haresh G Solanki², Pretesh P Patel², Krishna Patel² and Chavali Gopal¹

¹Central Institute of Brackishwater Aquaculture (CIBA), Chennai-600 028, India

²Navsari Agriculture University (NAU), Navsari-396 450, India

*Corresponding Author E-mail : pkpatilvet@gmail.com

Publication Data

Paper received:

06 October 2014

Revised received:

06 February 2015

Accepted:

20 March 2015

Abstract

The present study examined the complex interaction among stocking density and extent of probiotic use with production and environmental parameters in Litopenaeus vannamei culture ponds to suggest suitable management strategies. The study was conducted in L. vannamei culture ponds with stocking density of 35 nos sq m^-1 (Group I) and 56 nos sq m^-1 (Group II) and probiotic application @16.5 kg ha^-1 and 157 kg ha^-1, respectively. There was no significant difference noted between the two groups of ponds in respect to ammonia oxidizing bacteria (AOB) in sediment and nitrite oxidizing bacteria (NOB) in water samples, whereas? significantly higher levels of AOB in water samples of high intensity culture ponds (Group II) and NOB in sediment? samples of Group I? were observed. The levels of sulphur oxidizing bacteria (SOB) and sulphur reducing bacteria (SRB) in Group I pond water and in Group II sediment were significantly higher than their corresponding levels in the other group. In both the groups, ammonia, nitrite and sulphide concentrations were below toxic limits prescribed for shrimp farming. Comparing the production parameters at harvest revealed that low intensity culture ponds (Group I) had higher growth rate, average body weight and significantly lower FCR and higher survival rate than high intensity culture ponds (Group II).? The results indicated that application of microbial products in higher quantities did not benefit significantly, and there is a need to regulate quantum and schedule of biological product usage for economically sustainable shrimp culture.   

 Key words

Culture intensity, Litopenaeus vannamei, Microbial dynamics, Probiotics

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