Judul: Karakteristik sperma udang vaname Litopenaeus vannamei pada beberapa periode rematurasi
Abstrak: Seiring bertambahnya umur induk jantan, jumlah telur yang dibuahi meupun yang menetas mengalami penurunan. Oleh karena itu perlu dilakukan pengamatan terhadap karakteristik sperma mulai dari awal dihasilkan hingga beberapa periode rematurasi pada individu udang vaname yang sama sehingga dapat diketahui kecenderungan terjadinya perubahan kualitas sperma.
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Judul: Effect of Injection of Karamunting Melastoma malabathricum Leaf Extract on Sperm Quality of Male Vannamei Shrimp Litopenaeus vannamei Broodstock
Abstrak: Induk udang vaname jantan dengan kualitas sperma yang optimal sangat diperlukan untuk menunjang produktivitas pasokan benih unggul. Salah satu tanaman yang berpotensi untuk meningkatkan kualitas sperma pada udang adalah karamunting (Melastoma malabathricum L.). Penelitian ini bertujuan menguji pengaruh injeksi ekstrak daun karamunting terhadap kualitas sperma induk udang vaname jantan. Induk udang vaname jantan diberi perlakuan dengan diinjeksi akuades sebagai kontrol, serta injeksi ekstrak daun karamunting dengan dosis 7,5 mg/kg bobot tubuh (DK7,5), 10 mg/kg bobot tubuh (DK10,0), dan 12,5 mg/kg bobot tubuh (DK12,5). Injeksi dilakukan setiap lima hari sekali selama 20 hari pemeliharaan. Perlakuan injeksi ekstrak daun karamunting mengalami peningkatan jumlah sel sperma relatif dibandingkan kontrol. Abnormalitas sel sperma terendah diperoleh pada perlakuan DK7,5 hari ke-20 sebesar 2,04 ± 0,93%. Persentase melaninasi pada spermatofor induk udang vaname jantan terendah diperoleh pada perlakuan DK7,5 dan DK10,0 yaitu sebesar 27% dan 20%. Injeksi ekstrak daun karamunting yang dilakukan lima hari sekali berpengaruh terhadap kualitas sperma induk udang vaname jantan. Hasil terbaik diperoleh pada dosis 7,5 mg/kg bobot tubuh setelah empat kali injeksi., Male vaname shrimp broodstock with optimal sperm quality is needed to support the productivity of superior seed supply. One of the plants that has potential to improve sperm quality in shrimp is karamunting (Melastoma malabathricum L.). This study aims to examine the effect of karamunting leaf extract injection on sperm quality of male vaname shrimp broodstock. Male vaname shrimp broodstock were treated by injecting distilled water as a control, as well as injections of karamunting leaf extract at following doses: 7,5 mg/kg body weight (DK7,5), 10 mg/kg body weight (DK10,0), and 12,5 mg/kg body weight (DK12,5). The extract was injected every five days for 20 days. Treatments injected with karamunting leaf extract increased the number of relative sperm counts compared to control. The lowest sperm cell abnormality was observed in DK7,5 treatment on day 20 at 2,04 ± 0,93%. The lowest percentage of melanized spermatophore was obtained in DK7,5 and DK10,0 treatments, at 27% and 20%, respectively. The injection of karamunting leaf extract which is done every five days affects the sperm quality of male vaname shrimp. The best results were obtained at a dose of 7,5 mg/kg body weight after four injections.
Keyword: udang vaname, karamunting, kualitas sperma

Judul: Penyelesaian Stacker Crane Problem dengan Algoritme Largearcs dan Smallarcs
Abstrak: In graph theory, the Rural Postman Problem (RPP) aims to determine the shortest route with minimum cost, in which only certain edges or arcs are necessarily traversed. One type of RPP is Stacker Crane Problem (SCP) which deals with a mixed graph but only arcs are necessarily traversed. SCP can be solved by using two heuristic algorithms, i.e. Largearcs and Smallarcs algorithms, which include other algorithms in their steps, such as: Dijkstra algorithm to determine shortest route, Hungaria method to determine minimum bipartite matching, Prim algorithm to determine minimum spanning tree, and van Aardenne-Ehrenfest & de-Bruijn algorithm and Fleury algorithm to determine Euler circuits. The shortest Euler circuit resulted from two heuristic algorithms can be used to find a solution of SCP. The application of SCP is illustrated in establishing the minimum distance route of catering delivery.
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