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Functionality of a bacillus cereus biological agent in response to physiological variables encountered in cyprinus carpio aquaculture

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dc.contributor.author Lalloo, Rajesh
dc.contributor.author Maharajh, Dheepak M
dc.contributor.author Görgens, J
dc.contributor.author Gardiner, NS
dc.date.accessioned 2009-05-08T13:08:41Z
dc.date.available 2009-05-08T13:08:41Z
dc.date.issued 2008-05
dc.identifier.citation Lalloo, R, Maharajh, D, Görgens, J and Gardiner, NS. 2008. Functionality of a bacillus cereus biological agent in response to physiological variables encountered in cyprinus carpio aquaculture. Applied Microbiology and Biotechnology, Vol. 79(1), pp 1-26 en
dc.identifier.issn 0175-7598
dc.identifier.uri http://hdl.handle.net/10204/3363
dc.description This is a post-print version of the published article, and we have been granted permission by the publisher (Springer Verlag) to archive it on the CSIR's institutional repository (Research Space) en
dc.description.abstract Modern aquaculture utilises intensive reticulated systems resulting in waste accumulation and proliferation of disease. Conventional chemical treatments cause resistance in pathogens and negative environmental impact. The potential of a Bacillus cereus isolate (NRRL 100132) as a biological agent for aquaculture has been demonstrated in vitro and in vivo. The functionality of this isolate across a range of physiological conditions, including salinity, pH and temperature, based on rearing of high-value ornamental Cyprinus carpio, was investigated. Temperature had a significant influence on germination, specific growth rate and increase in cell number of B. cereus in shake-flask cultures, while salinity and pH did not have a measurable effect on growth. Controlled studies in bioreactors and modelling of the data to the Arrhenius function indicated the existence of high and low growth temperature domains. The rates of pathogenic Aeromonas hydrophila suppression and decrease in waste ion concentrations (ammonium, nitrite, nitrate, phosphate) were translated into a linear predictive indicator of efficacy of the B. cereus isolate at different temperatures. The present study confirmed the robustness of the B. cereus isolate (NRRL 100132) as a putative biological agent for aquaculture and further demonstrated a novel method for the assessment of in vitro biological efficacy as a function of temperature en
dc.language.iso en en
dc.publisher Springer Verlag en
dc.subject Bacillus cereus en
dc.subject NRRL 100132 en
dc.subject Aquaculture en
dc.subject Cyprinus carpio en
dc.subject Temperature effect en
dc.subject Salinity en
dc.subject pH en
dc.subject Pathogens en
dc.subject Disease control en
dc.title Functionality of a bacillus cereus biological agent in response to physiological variables encountered in cyprinus carpio aquaculture en
dc.type Article en


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