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Background:The ice-ice disease is one of the major problems in the cultivation of seaweeds. This problem seems to have worsened in recent years without any significant solution and central production sites of seaweed like in the Zamboanga Peninsula are affected. Methods: This present study investigated the current status of incidence and degree of infection of ice-ice disease associated with Kappaphycus alvarezii brown and green during July to September, 2018 in two varying seaweed farms in the Zamboanga Peninsula, Mindanao, Philippines. Ecological parameters known to affect the occurrence of ice-ice disease were obtained in each seaweed farm such as temperature, salinity, and pH. Results: In this study, incidence (%) and degree of infection (%) of ice-ice disease found to be highest in the seaweed farm in Mampang, Zamboanga City compared in Lapuyan, Zamboanga del Sur. Results of One-Way Analysis of Variance (ANOVA) on the incidence (%) and degree of infection (%) of ice-ice disease reveal significant differences (p= 5.141E-09 and p=6.094E-06 at α= 0.05, respectively) between the two selected farms. Conclusion: Occurrence of this disease could be attributed to the unfavorable environmental conditions. This incidence and infection of ice-ice disease are indicative of the varying resistance of K. alvarezii, thus this study may be significant with an implication to management strategies of the current status of the seaweed farms in Zamboanga Peninsula, Mindanao, Philippines.

A total of 200 of Crassostrea virginica populations of average weight range from 41.19 ± 3.42 to 47.53 ± 1.06 g were studied to determine the effect of the feed diets of Caulerpa lentillifera and sucrose as growth enhancement. Growth rates increased that range from 56.99 ± 3.16 to 61.56 ± 2.87 g for 90 days period using an artificial water tank system. Previous studies conducted that C. lentillifera contained high protein and were the most abundant component. This seaweed also contained high amounts of minerals and balanced amino acid and notably very rich in iodine. phosphorus, calcium, magnesium and copper that will contribute to oysters growth. Oysters are known to have the ability to uptake dissolved organic matter as nutrients. In the present study, the effects of culture water supplemented with sucrose were tested on oysters. Results revealed that this organic matter promotes growth to the oysters. Sugars will be metabolized into pyruvate through the glycolysis pathway and will result in the supply of energy.  Therefore, supplementation of sugar to oysters may have contributed as an energy source together with the lipid and protein content from the algae diet.