Cultivation trials of Gracilaria edulis (Pulai River and Tanjung Adang species) in tanks and pond

Abstract

Gracilaria edulis from Sungai Pulai and Tanjung Adang were cultured in tanks and earth pond used for shrimp culture. Growth rates were measured from September to November 2002, observations on light, nutrients (ammonium, nitrite and ortho-phosphate) concentration and epiphytes were also done. Graci/aria edulis was harvested and its agars were extracted after alkali treatment (5 % NaOH, 80°C, 1 hr).