Seaweed (Kappaphycus alvarezii) condition exposed to temperature change in Sulamu waters, Kupang Regency, East Nusa Tenggara, Indonesia

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Marcelien Djublina Ratoe Oedjoe, Alexander Leonidas Kangkan, Welem Turupadang, Ade Y H Lukas, Franchy Ch. Liufeto


Climate change is related to global warming, which indicates the rising temperature on the earth's surface, which in turn increases sea level. Rising seawater temperatures have a very complex effect on various aspects of the ocean, including fisheries. These impacts can occur directly or indirectly, which appear in different time variations. The impact of increased seawater temperature gives very complex effect on various marine aspects including seaweed. Temperature change greatly affect life in the sea. This study aims to know the effect of temperature on the seaweed Kappaphycus alvarezii production and growth in Sulamu waters. The study used survey method and direct field observations. Results showed that the seaweed production was 81.07 kg m-2 6 weeks-1 at 270C, 73.07 kg m-2 6 weeks-1 at 280C, 64 kg m-2 6 weeks-2 at 290C, 60.8 kg m-2 6 week-1 at 310C, and 30.47 kg m-2 6 week-1 at 32 – 33 0 C. The specific growth rate was 6.25% at 270C, 5.19% at 280C, 4.6% at 290C, 3.6% at 300C, 2.08% at 320C, and 1.9% at 330C, respectively. The seaweed production and growth at 27 – 300C were not infected by ice-ice disease, but those were infected by ice-ice disease at 32 – 33 0C.Key words: climate change, temperature, growth, production, Kappaphycus alvarezii

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