Efficacy of Probiotics in Improving Water Quality and Bacterial Flora in Fish Ponds | Chapter 02 | Theory and Applications of Microbiology and Biotechnology Vol. 2
Fish culture aimed at high production
through intense culture practices often leads not only to the alteration in
water quality but also to severe disease problems. The accumulation of organic
wastes deteriorates water quality and encourages the proliferation of
pathogenic microorganisms. To avoid these problems, probiotics are used as
bioremediation tool. The present study was aimed to know the changing patterns
of beneficial and pathogenic bacterial loads and water quality in fish ponds
treated with pond probiotics. For this study, three earthen fish ponds, were
cultured Pangasius sutchi, Catla catla and Labeo rohita, located in Balliparru
near Machilipatnam in Krishna District, Andhra Pradesh, India were selected and
studied for a culture period during 2009 to 2010. Two ponds were treated with
probiotics having Nitrosomonas (1.62 kg/ha) and Nitrobacter (0.82 kg/ha)
species and one pond was kept as control. During the culture period (August
2009 to July 2010), water quality parameters and the populations of total
heterotrophic bacteria (THB), beneficial bacteria (Nitrosomonas and Nitrobacter
species) and pathogenic bacteria (Pseudomonas) in water were analyzed. It was
observed that in treated ponds, THB and beneficial bacterial load increased and
pathogenic Pseudomonas load decreased. The bacterial population changed during
every fortnight sampling of the culture period. The changing patterns of
different bacteria in treated and control ponds were compared and discussed.
The concentrations of ammonia, nitrite and phosphates were observed to be low
in treated ponds than in the control pond. The present study revealed that the
probiotics are instrumental in maintaining good water quality, higher
beneficial and lower pathogenic bacterial loads in fish ponds.
Author(s) Details
Dr. P. Padmavathi
Department of Zoology and
Aquaculture, Acharya Nagarjuna University, Nagarjunanagar – 522 510, A.P.,
India
K. Sunitha
Department of Zoology and
Aquaculture, Acharya Nagarjuna University, Nagarjunanagar – 522 510, A.P.,
India
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