Pola tanam rumput laut Kappaphycus Alvarezii di Pulau Nain Kabupaten Minahasa Utara

Abstract

Culture pattern of  seaweed Kappaphycus alvarezii like cultivation calender will improve the quality dan increase productionof seaweed.  This pattern can be arranged through examining seaweed growth and measuring waters quality. Culture technique used was long line where seaweed was tied at 100 cm from water surface.  Cultivation cycle was done twice a year using five frames measuring 3 x 3 x 2 m³ each and located at five observation stations.  Biophysical of water at each station was measured. Data of biophysic and seaweed growth were measured every two weeks for three months (from July to October 2013).  The present of epiphytes and ice-ice and seaweed pests was also observed.  Research result found the best season for cultivating seaweed at Nain Island was from July to early September while the evidence of ice-ice was high from September to October.  Biophysic and water quality around Nain Island was suitable of the growth of K. Alvarezii.

Keywords: seaweed, cultivation calender, growth, waters condition, ice-ice