Seasonal variation in the abundance of wood boring molluscs in Vellar estuary, southeast coast of India
1988
Wooden blocks of Mangifera indica, each 30 x 5 x 5 cm in size and 650 cm^ surface area, were
exposed in the tidal zone of the Vellar Estuary at various positions from January 1981 to December 1981.
The season of the settlement of wood-boring molluscs was determined by exposing the blocks for 1
month at a time, and the rate of growth and the dominant borers were studied by exposing the blocks
for 3 to 12 months.
Martesia striata Linne, Teredo furcifera von Martens, Bankia carinata (Gray), Bank/a campanellata
Moll and Roch and Lyrodus pedicellatus Quatrefages were the common species encountered
in the test blocks. Intensive settlement was seen during Summer (Aprii-June) and post Monsoon
(January-March) periods.
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