3 research outputs found
The inhibitory effect of biofilms produced by wild bacterial isolates to the larval settlement of the fouling ascidia Ciona intestinalis and Pyura praeputialis
Marine biofouling is a present and potentially increasing future
problem at molluscan culture centres. The problem is highly variable,
exists on different scales, and its negative impact on cultured
organisms and related economic losses at these centres has not been
significantly controlled. One approach to fouling control has been the
incorporation of natural substances into anti-fouling paints which
inhibit the settlement of common fouling organisms. The main objective
of the present study was the isolation of naturally occurring
substances from marine bacteria which were inhibitory to the settlement
of Ciona intestinalis and Pyura praeputialis , two tunicate species
causing serious fouling problems in scallop culture systems in Chile .
Numerous bacterial strains were isolated from microfouling on natural
and artificial substrates submerged in the sea; of 73 strains isolated,
20% demonstrated inhibitory effects on the settlement of the larvae of
the above cited tunicates. The inhibitory substances produced by the
active bacteria were extracellular, and could be incorporated in an
inert matrix (PhytagelTM) without losing their inhibitory properties.
Some properties of the inhibitory substance isolated from bacterial
strain Clon Nil-LEM ( Alteromonas sp ) included thermostability, MW
< 3500 Da, peptidase lability (against C. intestinalis), and
undiminished inhibitory activity when incorporated in the inert matrix
The inhibitory effect of biofilms produced by wild bacterial isolates to the larval settlement of the fouling ascidia Ciona intestinalis and Pyura praeputialis
Marine biofouling is a present and potentially increasing future
problem at molluscan culture centres. The problem is highly variable,
exists on different scales, and its negative impact on cultured
organisms and related economic losses at these centres has not been
significantly controlled. One approach to fouling control has been the
incorporation of natural substances into anti-fouling paints which
inhibit the settlement of common fouling organisms. The main objective
of the present study was the isolation of naturally occurring
substances from marine bacteria which were inhibitory to the settlement
of Ciona intestinalis and Pyura praeputialis , two tunicate species
causing serious fouling problems in scallop culture systems in Chile .
Numerous bacterial strains were isolated from microfouling on natural
and artificial substrates submerged in the sea; of 73 strains isolated,
20% demonstrated inhibitory effects on the settlement of the larvae of
the above cited tunicates. The inhibitory substances produced by the
active bacteria were extracellular, and could be incorporated in an
inert matrix (PhytagelTM) without losing their inhibitory properties.
Some properties of the inhibitory substance isolated from bacterial
strain Clon Nil-LEM ( Alteromonas sp ) included thermostability, MW
< 3500 Da, peptidase lability (against C. intestinalis), and
undiminished inhibitory activity when incorporated in the inert matrix