Judul: Perilaku Makan dan Pengaruh Jenis Pakan Terhadap Pertumbuhan Filicaulis bleekeri Keferstein (Mollusca: Gastropoda)
Abstrak: Filicaulis bleekeri is a gastropod without shells which lives as a pest. Meanwhile, F. bleekeri has a potency in waste processing as well as protein source for animal protein livestock. The aim of this study is to investigate the effect of food types such as chinese cabbage, carrots, and green mustard on feeding behavior and growth of F. bleekeri. Observed parameters are preferences, duration, and frequency of feeding, and body weight. The results showed that F. bleekeri favor all parts of the plant that is the center and the edge of the carrot roots, the leaves and base of the leaf of chinese cabbage and green mustard. The highest feeding duration of F. bleekeri was in carrots (92 minutes) and the lowest was in chinese cabbage (48 minutes). The highest feeding frequency of F. bleekeri was also in carrots (average 1.6 times per observation) and the lowest also was in chinese cabbage (average 1.1 time per observation). The average of body weight of big sized F. bleekeri feed to chinese cabbage, carrots, and green mustard are 1.44 g, 1.49 g, and 1.80 g respectively. Body weight gain F. bleekeri small row is 0.82 g, 0.78 g, and 1.14 g respectively. The small sized F. bleekeri showed the highest growth rate.
Keyword: Growth, feeding behavior, Filicaulis bleekeri

Judul: Perilaku Kawin dan Siklus Reproduksi Deroceras laeve, Filicaulis bleekeri, dan Meghimatium bilineatum (Mollusca: Gastropoda)
Abstrak: Deroceras laeve, Filicaulis bleekeri and Meghimatium bilineatum are members of Gastropoda (Mollusca) that live as pest. However they are potential for protein source of animal livestock. Mating behavior and reproductive cycle of those were inspected for 42 days. The mating phase of F. bleekeri and M. bilineatum started from touching each other with tentacle or touching another slug’s body or tail with tentacle, slug come closer to other which will be the partner, stuck each other position, and withdrawal. The mating phase of D. laeve investigated slug touched body or tail another slug with tentacle. Mating behavior of M. bilineatum and F.bleekeri which stick each other position was the longest mating duration (average 281,4 second and 561,9 second respectly) during 42 days observation. D. laeve produced 264 eggs, took average incubation period for 14 days and had hatching percentage 60.98%. The fecundity per individual is 0.31/day.
Keyword: Deroceras laeve, Filicaulis bleekeri, mating behaviour, Meghimatium bilineatum, slug egg

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular