Abstract

Oysters are naturally complete and are often referred to as “milk of the ocean”. Only one of its kind corporal and organic conditions at Cox’s Bazar coast, southeastern Bangladesh, is accountable for an accretion of high amounts of Oyster spat. Direct settlement of the spat to suspended cultch in the water column was compared by using locally available selected materials (e.g. plastic sheet, pottery, windowpane shell and bamboo) at Gorakghata of Moheshkhali channel and Chufaldhandi canal of Cox’s Bazar coast. Coastal poor community was involved to prepare the cultch by using locally available selected materials such as plastic sheet, pottery, windowpane shell and bamboo. Ten pieces of plastic sheets/pottery/windowpane shell were connected with ropes maintaining 10 cm inter-distance between two subsequent units to prepare a cultch frame of about 1 m long. The prepared cultch frames were installed at different depths of two selected sites for spat collection so as not to interfere with the day-to-day operations of the fishermen, providing unrestricted boat access to coastal waterways for their ongoing navigational activities. Environmental variables such as water temperature, salinity, transparency, dissolve oxygen and pH were measured fortnightly from each culture sites. Bamboos of various sizes were used for raft construction. Plastic drums of 200 liter , one on each corner, were used as floats to keep the raft afloat. Iron anchor was attached to the raft. Cultch, rope and tray were hung from the raft for culture in both sites.

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