Date Received: 08-10-2018 / Date Accepted: 14-06-2019
This study evaluated the effectiveness of adding different types of gutweed powder on the growth and survival rate ofblood cockle (Anadara granosa) at the juvenile rearing stage. The blood cockle seeds with initial shell length of 4.71 ± 0.03 mm were stocked in the PVC tanks with aeration system. There were four feeding treatments with triplicates eachas follow: 1) 100% algae from Tilapia-Green water system (GW, control treatment), 2) GW + gut weed powder, 3) GW + gutweed powder fermented with Saccharomyces cerevisiae, and 4) GW + gut weed powder fermented with Bacillus subtilis. After 60 days, the highest survival rate was recorded in GW (75.3%) and this was significantly different from other treatments (p0.05). The lowest survival rate was observed in GW + gut weed powder fermented with yeast (56.9%). Blood cockles obtained the highest shell weight and length in cockles fed GW+ gut weed powder fermented with B. subtilis(70.0 ± 1.6 mg and 6.18 ± 0.04 mm, respectively). Our findings suggested that adding gut weed powder fermented with B. subtiliscan improve the growth performance of juvenile blood cockles.