Environmental Engineering Reference
In-Depth Information
Manoalide
3318
together with a steroid, isolated from a marine sponge
Smenospongia
sp., showed an antifouling activity but no toxicity against
the cypris larvae of a barnacle
Balanus amphitrite
,withanEC
50
value of
0.24
gmL
-1
) [13].
10-Formamido-4-cadinene
3319
obtained from a sponge,
Acanthella caver-
nosa
, also inhibited a larval settlement at a concentration of 0.5
gmL
-1
(CuSO
4
: 0.15
µ
µ
gmL
-1
[14].
The sixteen secondary metabolites of a green alga
Caulerpa prolifera
were
isolated. They are shown as compounds
C3320
-
C3335
.Theantifoulingactiv-
ity of the algal extracts in laboratory assays against two of the major groups
of fouling organisms. The extracts exhibited moderate to significant activi-
ties against two Gram-positive and one Gram-negative marine bacteria. The
measured inhibition zone varied from 17 to 83% of that observed with the
biocide TBTO. On the other hand, the growth inhibitory effect of the
Caulerpa
prolifera
extract was evaluated against a marine microalga
Phaedactylum tri-
µ
Scheme 4
