Ecology, Environment and Conservation, vol: 25, (2019)
Growth of red algae Eucheuma denticulatum (BURMAN) Collins & Hervey, farmed using different methods and different strains in Letbaun Village, Semau Island
Tisera W.L., Paulus C., Ambariyanto, Tanody A.S.
Abstract
Seaweed mariculture of Eucheuma denticulatum (trade name: Eucheuma spinosum) is one of the main commodity from Semau Subdistrict. East Nusa Tenggara Province. The success of macro algae mariculture, including culture of Eucheuma denticulatum is strongly influenced by the growth rate, which is produced through using of superior strain, and suitable culture methods, and locations. The objectives of the study were to analyse and compare the growth of E. denticulatum farmed using longline and off-bottom methods, as well as different strain (Brown versus Green). This study was conducted in one of cultivation areas in Semau Subdistrict, East Nusa Tenggara Province. The planting methods used in this study were the longline and off bottom method, and cultured for four weeks. The data were analized using Absolute and Specific Growth Rate for different strain and method. The results showed that the growth rates of E. denticulatum farmed using longline method was significantly faster and appeared to be better in thallus morphology compared to off-bottom method. Specific Growth Rate (SGR) of E. denticulatum farmed using longline was 9.66% ± 1.5 day-1, while off buttom showed 7.315% ± 2.4 day-1. In terms of different strains, E. denticulatum brown strain showed better growth rate (8.8%) not significantly compared to the green one (8,6%). Physical and chemical parameters of the waters, included temperature, salinity, transparency and currents showed normal ranged. © EM International.
Keyword: Eucheuma denticulatum; Farming; Letbaun Village; Longline; Off-Bottom