Experimental spat collecting of the edible oyster, Saccostrea cucullata born (Bivalvia) in the Kundichi creek, Dar es Salaam

Abstract

A one year study was carried out at Kunduchi Creek, Dar es Salaam, to determine spat settlement using the three different substrates (clutches): coconut shells, asbestos and cockle shells, set at three different depths, 0.5 m, 1 m, and 1.5 m. The experiment was set up at three different sites within the creek. There were no significant differences among treatments (sites, depths, clutches). However, spat settlement exhibited seasonal differences, with peak spatfall recorded during the long rains (April to May). There were significant differences in the number of spat between the upper and lower surfaces of the substrates, with more spat preferring the underside. It was concluded that the Kunduchi Creek is a potential site for oyster farming. However, since the area is heavily used by artisanal fisherfolk, any future plans to establish mariculture operations would have to take into consideration potential conflicts with other user groups.



Tanzania Journal of Science Volume 27A (Special Issue) 2001, pp. 65-78