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Title Effect of acetic acid treatment on the control of non-indigenous ascidians in farmed Indian pearl oyster Pinctadafucata
 
Names Chinnadurai, S.
Jagadis, I.
Meenakshi, V.K.
Mohamed, K.S.
Date Issued 2018 (iso8601)
Abstract Control of biofouling has been one of the major challenges in pearl
culture. Field experiments were performed to control the biofouling
in farmed pearl oyster Pinctada fucata by treating the oysters first
with 5% acetic acid at different time interval (2, 5, 10 min) and then
kept for evaluation at three depths (1, 3, 5 m). The average total
fouling biomass on oysters exposed for 2, 5, 10 min were 7.35, 6.97
and 6.49 g/oyster/month respectively, while control showed 10.56
g/oyster/month on completion of four months. Mortality of oysters
were 60, 29, 14% at 10, 5 and 2 min exposure and control had only
7%. There was significant differences in total fouling biomass and
mortality between the control and treatments (p<0.001). Results
suggest that 2 min exposure of oysters in acetic acid and deployed
at a depth of 3 m was found to be best for reducing biofouling as
well as more effective in preventing the settlement of non-indigenous
ascidians, especially Didemnum sp. The outcome of the present
study may contribute to further optimise the current antifouling
managements in pearl culture and fill the knowledge gap for farming
practices and their management specifically with reference to the
monitoring and cleaning procedures.
Genre Article
Identifier J. Mar. Biol. Ass. India 60(2):67-74