Phytoplankton Ankistrodesmus sp. as an alternative tool in controlling fish disease
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Date
2016-02-04
Journal Title
Journal ISSN
Volume Title
Publisher
AACL Bioflux
Abstract
The ability of the freshwater phytoplankton, Ankistrodesmus sp. to inhibit the growth of the
fish pathogenic bacterial, Aeromonas hydrophila and Streptococcus agalactiae was tested. The inhibitory
activity of Ankistrodesmus sp. against these bacterial were observed in (1) phytoplankton culturing
control medium, Bold Basal Medium (BBM) and (2) filtrate prepared from Ankistrodesmus sp. cultured in
BBM. The cell densities of A. hydrophila when cultured in Ankistrodesmus sp. filtrate medium showed no
significant difference (P>0.05) from those cultured in control medium. In contrast, there was inhibition
activity on the growth of S. agalactiae observed in Ankistrodesmus sp. filtrate medium against those
cultured in control medium. The cell density of S. agalactiae was significantly lower (P<0.05) in
Ankistrodesmus sp. filtrate medium compared to the control medium started from day 4th until the 14th
day. Thus, the present study concluded that Ankistrodesmus sp. can be an essential tool for inhibiting
the growth of S. agalactiae
Description
Keywords
Aquaculture, Microalgae, Streptococcosis,