Judul: Comparison of Depth and Material of Lobster Larva Post Traps in Awang Bay, Lombok, West Nusa Tenggara
Abstrak: Lobster adalah salah satu komoditas perikanan yang memiliki ekonomis tinggi. Usaha budidaya lobster masih bergantung larva dari alam, sedangkan larva yang tertangkap jumlahnya sedikit dan ukuran tidak seragam. Sehingga diperlukan perangkap yang efektif dan efisien. Keefektifan suatu perangkap disebabkan berbagai faktor salah satunya yaitu kedalaman penempatan perangkap dan material perangkap. Sehingga pada penelitian ini diuji berdasarkan uji kedalaman penempatan perangkap dan material pembentuk. Pada uji material yang digunakan yaitu material dari kantong semen dan kantong pakan dan uji kedalaman penempatan perangkap kedalaman yang digunakan yaitu kedalaman 2,4,6,8,10,12, dan 14 meter. Penelitian ini bertujuan untuk membandingkan material perangkap yang efektif dan mengidentifikasi kedalaman peletakan perangkap yang tepat yang sesuai jenis dan ukuran post larva lobster. Hasil penelitian menunjukkan pada penempatan kedalaman perangkap jenis yang paling banyak didapatkan yaitu lobster pasir pada kedalaman 14 meter dengan jumlah 35 ekor dan ukuran 5 cm banyak ditemukan pada kedalaman 14 meter dengan jumlah 25 ekor. Pada perbandingan material perangkap kantong semen mendapatkan hasil tangkapan tetinggi, dimana kantong semen jenis larva lobster yang paling banyak tertangkap yaitu lobster pasir dengan jumlah 154 ekor dan pada kantong semen didapatkan ukuran 5 dengan jumlah yang paling banyak tertangkap. Berdasarkan hasil penelitian menunjukan kedalaman 14 meter dan bahan karung semen mendapatkan post larva lobster terbanyak dengan jenis yang tertangkap yaitu lobster pasir dan ukuran 5 cm mendapatkan hasil tangkapan tertinggi
Keyword: Post larva lobster, trap, material, material, trap, post larva lobster

Judul: Efektivitas Perangkap Juvenil Spiny Lobster Berdasarkan Tingkat Kedalaman, Jenis Bahan Dan Lama Perendaman Di Perairan Palabuhanratu
Abstrak: The objectives of the research is to create an effective trap of spiny lobster juvenile base on trap position in the sea water layer, type of the material and trap soaking time. The experimental fishing was conducted in the Kertajaya Sangra wayang water of Sukabumi District. There are 7 levels of water depth are 1,5 m, 3 m, 4,5 m, 6 m, 7,5 m, 9 m, 10,5 m and 4 kinds material are waring, woven shirt, woven netting and gunny. The result of the research was the traps can catch the spiny lobster juvenile, the most catch was found in the 1-3 m water layers and use material gunny. The main catch was spiny lobster juvenile and catch were crustacean group and fish group (pisces). The trap’s position in the water layer influence the catch value of spiny lobster.. The most main catch was found in water levels 1,5m and 3m. The best material for spiny lobster juveniles trap was gunny. The fisherman can use spiny lobster juvenile trap by operating in water levels 1-3 m, use gunny meterial with one day soaking time.
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Judul: A Continuous Vaccination Strategy in the SVIR Epidemic Model
Abstrak: Vaccination is conducted to minimize the spread of a disease. The vaccination is usually done several times within a fixed time interval. In the SVIR model, it is assumed that individuals do not get immediate immunity following a vaccination program. So according to process of vaccination on SVIR model, there are two strategies, i.e. the continuous vaccination strategy (CVS) and the pulse vaccination strategy (PVS). In this study, only the CVS strategy in epidemic model SVIR is considered. Results of the study indicate that dynamics of the CVS system depends on the basic reproductive number. If the basic reproductive number is less than one, then the disease-free fixed point is asymptotically stable. It means that the disease will eventually disappear from the population. Conversely, if the basic reproductive number is greater than one, then the endemic fixed point is asymptotically stable, which means that the disease will remain exist in the population. Simulation result shows that the vaccination would minimize the spread of disease by reducing the basic reproductive number. If the time for the vaccinated recipients to obtain the immunity, as well as a possibility of vaccinated recipients to be infected are neglected, then the disease will be eradicated. This condition is called an over-evaluating effect of vaccination.
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