Judul: Pengaruh Salinitas terhadap Kadar Glukosa Darah dan Laju Metabolisme pada Pendederan Ikan Kakap Putih (Lates calcalifer, Bloch)
Abstrak: The increase production of barramundi (Lates calcalifer) can be increased extensively by using brackishwater and idlle pond. Therefore, the study about salinity in this fish must be done. The study aim is to know the adaptation of barramundi of 4.88 cm on low salinity by measuring blood glucose level, metabolic rate, survival rate, growth and feed conversion ratio in nursery system. The treatment in this study consists of salinity 4, 18 and 32 g/L. Blood glucose level was measured at 0, 5th and 10th days by using a glucose test kit for human beings. The metabolic rate was measured every ten days, indirectly by measturing the total of oxygen of barramundi. The results showed that blood glucose level, metabolic rate, survival rate, growth and feed conversion ratio were not affected by rearing media salinity of barramundi, althought blood glucose level in salinity of 18 g/L higher (p<0.05) in 10th days of rearing. This study showed that Barramundi have good adaptation on low salinity, and can be cultured in fresh water pond.
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Judul: Kelangsungan Hidup dan Pertumbuhan Juvenil Ikan Kakap Putih (Lates calcarifer) Dipelihara pada Media Air Hijau, Wadah Gelap dan Transparan
Abstrak: Barramundi’s cultivation is still constrained by the insufficient of barramundi’s fry for aquaculture production. Size 1-2 cm of barramundi’s fry has a greater risk of mortality than the other size. Most of the deaths are caused by cannibalism. The aims of this research were to examine the survival and growth rate of barramundi’s juvenile as fry with green water system, dark condition and transparent containers treatment. The size of the barramundi’s juveniles that used in this research were 1-2 cm and the average of weight were about 0.24±0.08 g, the density for each treatment was 1.000 fish/m3. The barramundi was feed by at satiation method for 3 times/day with crumble feed. The results showed that the green water system, dark condition and transparent containers treatment have survival rate, growth rate, feed conversion ratio, and the amount of consume feed did not differ significantly, but the absolute growth length was differ significantly for each treatment. The best treatment in this reseach was the green water system and transparent containers treatment. Glucose levels of barramundi’s blood tend to increased in the first 10 days and oxygen consumption rate in the 30 days was continues to decline in all treatments.
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Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology