Cultivation trials of gracilaria sp. (Rhodophyta) in pond in Pusat Penyelidikan Ternakan Air Payau (PPTAP), Gelang Patah, Johore

Abstract

The cultivation of the red seaweed Gracilaria sp. was conducted throughout a culture period of 8 weeks in a pond in Pusat Penyelidikan Temakan Air Payau (PPTAP), Gelang Patah, Johore. This cultivation was carried out using 2 different methods which were the line culture method and cage culture method. During the culture period, the relative growth rate (RGR, % day ·1 ) of Gracilaria sp. for both methods was monitored weekly. Growth rates at 3 different depths (top, middle, bottom) for line culture method were also monitored. At the end of the culture period the Gracilaria sp. was harvested and extracted to determine the agar quality of Gracilaria sp.