Judul: Evaluasi Pemanfaatan Kompartemen di Keramba Jaring Apung Terhadap Tingkat Stres dan Pertumbuhan Lobster Pasir Panulirus homarus
Abstrak: Still found weaknesses in survival rates and low productivity of spiny lobster, it is thought to be influenced by environmental factors such as stress levels arising from the cultivation of media used such as maintenance of the spiny lobster captured without the use of shelters, but shelter is useful as a shelter of cannibalism. So that the necessary development innovation of lobster container that can minimalized of stress levels and increase productivity such as making special compartment equipped with shelter. Compartments in this study is made of fiber-shaped cube that hung in floating net cages and lobster-sized used is ± 50gr/lobster derived from fishermen around the waters of Pelabuhan Ratu with the feed is trash fish with protein levels of 63.22%. Maintenance performed using a compartment in floating cages for 30 days.Test parameters were observed during the study consisted of the level of stress (kortisol and glucose levels in the hemolim), survival rates, weight gain, specific growth rate, behavior and quality of water. Experimental design applied in this study is completely randomized design. Treatments of this study consisted of (1) control treatment (K) that spiny lobsters were kept/cultivated in nets that did not use compartment and shelter with density of 20 lobster/m2, (2) KM1 treatment that spiny lobsters were cultivated used compartment with density of 25 lobsters/m2 and (3) KM2 treatment that spiny lobsters were cultivated used compartment and shelter with density 50 lobster /m2. Data of cortisol glucose and levels, survival and growth, were analyzed using ANOVA and with helped of software MINITAB 16. The results showed that the highest stress levels of spiny lobsters was found in control treatment, it was shown by the high levels of cortisol (1.59±0.28 nmol/l) and glucose (17.13±1.27 mg/dl), while the lowest stress levels was found in KM1 treatment with cortisol (1.17±0.14 nmol/l) and glucose level (8.34±0.5 mg/dl). The highest survival rate of spiny lobsters was found in KM2 treatment (95±0.03%) and the lowest survival rate was found in the control treatment (62.50 ±0.02%). The highest weight gain (26.29±1.69%) and highest specific growth rate (0.77±0.014%) were found in KM1 treatment, while the lowest weight gain (13.51±4.47%) and lowest specific growth rate (0.42±0.13%) was found in KM2 treatment. Spiny lobsters growths were cultivated using compartments and shelters was better than without using compartments and shelters. Spiny lobsters cultivated in floating nets without using compartments and shelters tend to be more stressful and caused decreasing of the growth and survival rates. Weight gain has a strong relationship with cortisol and glucose levels. Decreased levels of stress (cortisol and glucose levels) due to increase in growth Cortisol and glucose levels have a positive correlation, meaning that the increase cortisol levels followed by increased of glucose levels, which is in line with the opinion and Krogdahl Hemre (1996) and Falahatkar and Barton (2007) that cortisol can increase the levels of glucose in the haemolymph, disturbances in cortisol secretion may alter the response of glucose and increase glucose values can be attributed to differences in the mechanism of action of cortisol. Spiny lobsters cultivated using compartment showed normal behavior patterns
Keyword: 

Judul: Evaluasi Penggunaan Shelter terhadap Respons Fisiologi Pendederan Lobster Pasir Panulirus homarus Menggunakan Sistem Resirkulasi
Abstrak: Salah satu kendala dalam pembesaran lobster pasir Panulirus homarus adalah rendahnya kelangsungan hidup benih. Hal tersebut terjadi karena benih yang ditebar tidak mengalami proses aklimatisasi terlebih dahulu. Selain itu, ukuran yang tidak seragam juga dapat menyebabkan terjadinya kanibalisme pada saat moulting. Penggunaan shelter dimaksudkan untuk meminimalkan kontak antar benih lobster, mengurangi stres selama moulting serta memaksimalkan pertumbuhan. Penelitian ini bertujuan untuk menganalisis dan menentukan jenis shelter yang meminimumkan respons stres dan memberikan produksi benih lobster yang baik. Pada penelitian ini digunakan rancangan acak lengkap (RAL) dengan 4 perlakuan dan 2 ulangan. Jenis perlakuan adalah penggunaan shelter dari jaring, pipa paralon, lubang angin dan tanpa shelter sebagai kontrol. Variabel gambaran hemolymph yang digunakan untuk mengkaji respons stres diantaranya adalah Total Hemocyte Count (THC), glukosa, dan total protein. Variabel kualitas air selama penelitian yang diuji meliputi suhu, salinitas, oksigen terlarut, karbondioksida, nitrat, nitrit dan amonia. Pengujian biometri meliputi bobot, panjang total, dan tingkat kelangsungan hidup. Uji proksimat dilakukan pada pakan (ikan teri) dan lobster. Hasil pengujian hemolymph (THC, glukosa, dan total protein) selama penelitian menunjukkan, shelter paralon menghasilkan respons stres lebih rendah dan stabil apabila dibandingkan dengan perlakuan lainnya. Kondisi kualitas air selama penelitian, secara keseluruhan masih memenuhi standar budidaya untuk lobster. Penggunaan shelter paralon menghasilkan pertumbuhan dan kelangsungan hidup yang lebih baik dibanding perlakuan lainnya. Laju pertumbuhan bobot harian lobster tertinggi dicapai pada shelter paralon, yaitu sebesar 1,38±0,04%. Tingkat kelangsungan hidup tertinggi terdapat pada penggunaan shelter paralon sebesar 65,26±1,41%, sedangkan terendah terdapat pada kontrol sebesar 39,47±2,12%. Penggunaan shelter tidak mempengaruhi kandungan proksimat lobster. Penggunaan shelter paralon menghasilkan rasio konversi pakan (FCR) terendah (8,53±0,16), sedangkan tertinggi terdapat pada kontrol (9,33±0,16). Berdasarkan hasil penelitian disimpulkan, penggunaan shelter pada pendederan lobster Panulirus homarus memberikan respons stres yang lebih rendah dibandingkan kontrol, ditinjau dari respons THC, glukosa, dan total protein hemolymph lobster selama penelitian. Shelter paralon merupakan shelter yang terbaik, karena mampu menekan tingkat stres dan menghasilkan tingkat pertumbuhan dan kelangsungan hidup yang lebih baik dibanding perlakuan lainnya.
Keyword: glukosa, kelangsungan hidup, lobster pasir, shelter, stres, THC, total protein

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. ,,,
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular.