Judul: Kajian sinyal reproduksi alam dalam proses reproduksi dan perkembangan sel telur karang keras (Scleractinia) polip besar di Pulau Badi, Makassar
Abstrak: Recent observation shows coral reef disturbance at dangerous level. It needs seriously conservation by used rehabilitation method. There are many ways of rehabilitation methods but they have many disadvantages. One of rehabilitation methods is transplantation. The disadvantege that method is coral broodstock which take from nature makes coral reef ecosystems destroy if taken in large scale. The other disadvantage is coral transplant can’t a setback after a few offspring. To cover the shortage of rehabilitation needs arrest method to cultivate the larvae. First that method needs natural signal reproduction information, but that informations at tropics area are so less. To resolve that problem the research was conducted. The result of research shows that comparison between environmental factor and coral physiological are lack of correlation. Environmental factors that correlate positively are moon phase and nutrients (PO4) eventhouh a small correlation (below 0,5). The correlation at Euphylia Ancora from PO4 and moon phase are 0,059 and 0,203, while the correlation at Euphylia glabrescens from PO4 Key words : Signal Reproduction, Reproduction Proceses, Oosite Development, Big Polip Coral, Badi Island and moon phase are 0,218 and 0,112. This correlation indicates that a lack of environmental factor influences on oosite development and reproduction of corals in the tropic area. This condition is caused by the absence of extreme environmental factor variation at tropic area.
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Judul: Pengaruh Pemberian Artemia Sebagai Pakan Terhadap Pertumbuhan Karang Lunak Sarcophyton Sp. Pada Kolam Terkontrol
Abstrak: Now days, the coral utilization is getting higher, even excessive. In other side, coral reef ecosystem is very susceptible to disturbance whether from human activity or natural phenomenon and need a long time for a full recovery (Burke et al., 2011). Transplantation of Octocoral (soft coral) like Sracophyton sp. as second main constructor of coral reef after hard coral (Manuputty, 2008 dalam Utama, 2010) can be one good solution to fix the broken coral reef ecosystem. The Transplantation has been a popular method in a soft coral conservation activity until this time. This method is usually done in the sea which is habitat the soft coral itself. Unfortunately, doing transplantation in the sea has some difficulty due to uncontrolled natural situation and will be expensive. Torrential current, temperature fluctuation, competition, predators, food supply, and others unpredictable condition can be a problem for propagating the coral in the sea. Therefore, there’s had to be a transplantation method that is applied in a controlled system so the natural troubles, including food supply, can be handled. Food is one of important factors that is also effecting the succeed rate in propagating the coral. Soft coral itself is a member of Cnidarian that is carnivorous and eats micro organism. Based on that fact, Artemia sp. which is included as zooplankton should possible to be used as soft coral food. Further research is required to understand how much Artemia affecting the soft coral growth. According to the research result, the living rate of the coral reef in the treatment vessel and control vessel show the same value, it is 100%. This means that the soft corals already have good adaptation with new environment. The variants analysis shows that the food doesn’t much influence the growth. It means absolute growth and growth velocity of the fragments that is given Artemia as additional food do not show enough difference compared to the fragments that do not get additional food (control).
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf