Abstract
Growth of Crassostrea gryphoides (Schlotheim 1813) cultured through rafts at Ambrah creek, Garho and Wari creek, Shah Bunder has been described. The spats established in three months in Ambrah creek and 4 months in Wari creek. Growth data were collected from June 2011 to May 2012 from 10 rafts in Ambrah creek and eight rafts in Wari creek. The growth at the two places was continuous, however, slower in Wari creek. When cultured through rafts, the oyster reached to an average size of 12.14 ± 0.07 cm in length in a year in Ambrah creek and c 7.94 ± 0.02 cm in Wari creek with an overall rate of 1.01 cm.Moth-1 and 0.71 cm.Month-1 , respectively. The growth was significantly affected by age as well the rafts and the two factors interacted significantly at both places. RGR in both creeks declined regularly through out the year. In both creeks spat growth was faster than that of the adult oysters. Comprehensive studies pertaining to the growth of oysters in Indus delta are in progress to elucidate economic aspects of this venture and quantity and the quality of meat obtained.
