In order to study the diurnal variations in the occurrence of mullet seed, collections were made With a drag net once in a fortnight 3 to 6 days after the full moon and new moon days from august 1978 to July 1979 and also 2-3 days before full and new moon days from August 1979 to October
1979 in addition to the regular collections made on other days, at Theedai near Mandapam along the Palk bay
