The effects of ozone and
probiotics on the survival of black tiger shrimp (penaeus monodon)
O.
Meunpol, K. Lopinyosiri, P. Menasveta-2003
Aquaculture,
220 : 437-448
Abstract :
Total ozone production (TOP) from an ozonator,
residual ozone concentration (ROC) in water, and the effects of ozone with
or without probiotic supplemented feeds on bacterial growth, and shrimp
(Penaeus monodon) survival were investigated. Minimal effective ROC to
inhibit 3 log units of Vibrio harveyi D331 for 6 h and 2 log units of
Bacillus S11 for 9 H was 0.38 g O3/l of ROC from 5-min ozonation.
Shrimp postlarvae exposed to 0.34-0.50 mg O3/l ROC (30-min
ozonation) effectively inhibited 3 log units of V. harveyi D331 for 24 h. At
this ROC dosage, there was no effect either on shrimp or on intestinal
probiotics (Bacillus S11). Shrimp survival from probiotic treatment,
coupling with ozonation, increased significantly (P </= 0.05) compared
with controls.
(Marine Biotechnology Research Unit at Department of
Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330,
Thailand, Tel: +66-2-2185279, fax: +66-2-2547680, e-mail: oraporn@biotec.or.th)