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: Pengaruh tingkat pemberian makanan yang berbeda terhadap pertumbuhan dan kelangsungan hidup benih ikan kakap putih (Lates calcarifer, Bloch)
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh tingkat pemberian makanan yang berbeda terhadap pertumbuhan dan kelangsungan hidup benih ikan kakap putih. Penelitian ini dilakukan di Subbalai Penelitian Budidaya pantai Bojonegara, Serang, Jawa Barat, dimulai dari tanggal 30 Nopember sampai dengan 27 Desember 1988. Benih ikan yang digunakan berumur 30 hari dengan kepadatan 15 ekor per wadah. Wadah yang dipakai adalah "pan-light" berukuran 30 liter yang diisi air 25 liter. Makanan yang diberikan adalah daging udang putih (Penaeus merguiensis) yang dicincang halus. Penelitian ini menggunakan 3 perlakuan dan 3 ulangan per perlakuan. Perlakuan tersebut adalah tingkat pemberian makanan sebesar 20, 40 dan 60 persen biomassa ikan. Rancangan percobaan adalah rancangan acak lengkap. Pemberian makanan dilakukan 3 kali sehari dengan proporsi yang sama besar, yakni pada pukul 08.00, 12.00 dan 16.00. Penyesuaian jumlah pemberian makanan dilakukan setiap 7 hari sekali. Kondisi air dijaga dengan menyifon kotoran setiap hari dilakukan 15 menit setelah pemberian makanan. Pergantian air terjadi terus menerus dengan sistem air mengalir dengan debit 30 liter per jam dan dihentikan pada saat pemberian makanan. Untuk data penun- jang diukur suhu, oksigen terlarut, pH, salinitas, nitrit dan amonia. ...
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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