Deislie R. H Kumampung, Grevo Gerung, Moh. Sasmito Djati, Yenny Risjani
Postgraduate of Brawijaya University Malang Jl. Veteran Malang 65145 Indonesia
Faculty of Fisheries and Marine Science, Sam Ratulangi University Jl. Kampus Unsrat Manado 95115 Indonesia
Faculty of Basic Science, Brawijaya University Malang Jl. Veteran Malang 65145, Indonesia
Faculty of Fisheries and Marine Science, Brawijaya University Jl. Veteran Malang 65145 Indonesia
Key words: Growth, Red algae, Gracilaria salicornia.
This study showed that mean growth of G. Salicornia collected from North Sulawesi waters varied and appeared different among treatments. Those exposed to the red, blue and white lights had mean growth of 1.0658, 0.9695 and 1.0788, respectively. The one way analysis of variance revealed that there was no significant difference among light treatments in mean growth of G. salicornia (P≥0.05). Mean relative growth rate was 7.34% for red light, 4.8609 % for blue light, and 7.2748 % for white light, respectively. Two-way ANOVA also showed no significant difference in the relative growth rate of Gracilaria salicornia from the three light treatments (P≥0.05). Nevertheless, there was significant difference in growth rate based on observation time (P<0.05), in which Tukey test indicated that period 1 differred from period 2, 3, and 4. Light and observation time interactions did not show significantly different effect (P ≥ 0.05) on the algal growth. So Algae can living free on light different, grow and survival. But it must be to environment condition free from parasite and other epifit.
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