Judul: The Effectiveness and Efficiency of Antidomine and Hormone GTH to Replace Eye Ablation in Efforts to Accelerate The Maturity of Gonads Shrimp Vanamei.
Abstrak: Kementrian Kelautan dan Perikanan berupaya meningkatkan target produksi udang pada periode 2010 – 2014. Namun teknik ablasi mata yang biasa digunakan untuk percepatan pematangan gonad udang terganjal oleh isu animal welfare, sehingga perlu ditemukan teknik lain untuk percepatan kematangan gonad udang. Penelitian ini bertujuan untuk membandingkan tingkat efektivitas ablasi mata dengan teknik percepatan pematangan gonad udang yang menggunakan hormon GTH dan antidopamin. Penelitian ini dilaksanakan pada bulan Mei hingga Juni 2011 bertempat di Balai Budidaya Air Payau Situbondo, Jawa Timur dan Laboratorium Kesehatan Ikan, Departemen Budidaya Perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor. Ablasi mata dilakukan dengan cara memotong salah satu tangkai mata pada udang, sedangkan hormon yang digunakan diberikan ke udang melalui pakan yang telah diberi tambahan perekat untuk meminimalisasi hilangnya hormon saat berada di air. Hasil penelitian menunjukkan pada dua minggu awal pemeliharaan telah ada udang matang gonad dari perlakuan hormon, dan jumlahnya terus meningkat dari 2 ekor menjadi 5 ekor pada dua minggu selanjutnya. Uji histologi gonad menunjukkan tingkat kematangan gonad udang perlakuan hormon telah mencapai TKG III. Hasil penelitian ini menunjukkan bahwa hormon GTH dan antidopamin mampu mempengaruhi percepatan pematangan gonad pada udang vaname.
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Judul: Rekayasa Hormonal pada Udang Vaname selama 28 Hari sebagai Pengganti Teknik Ablasi Mata dalam Usaha Percepatan Pematangan Gonad
Abstrak: Animal walfare issues to appropriate things to be considered in the application of eyestalk ablation on gonadal maturation of shrimp in the shrimp hatchery. The purpose of this study was to develop an alternative to eye stalk ablation technique with the hormonal induction of gonad maturation in shrimp vaname. Pregnant mare serum gonadotropin (PMSG) hormone, recombinant growth hormones from Epinephelus lanceolatus (rElGH), and antidopamin (AD) 3 is used to induce gonadal maturation of broodstock shrimp. Hormones administered via the feed for 28 days, with treatment: A. 40 IU PMSG/kg shrimp + 0,01 mg AD/kg shrimp, B. 80 IU PMSG/kg shrimp + 0,02 mg AD/kg shrimp, C. 40 IU PMSG/kg shrimp + 0,01 mg AD/kg + 0,1 mg rElGH/kg shrimp, D. 80 IU PMSG/kg shrimp + 0,02 mg AD/ kg + 0,1 mg rElGH/kg shrimp, E. Ablation, and F. Control. Each treatment consists of 15 individual shrimp with shrimp as replication. Results showed that the shrimp were induced with hormones have matured on day 14, while the shrimp were ablated started on day 7. Treatment hormone 40 IU PMSG + 0,01 mg AD + 0,1 mg rElGH showed the best results for the number of shrimp mature gonads (80%), the percentage of spawning shrimp (66,7%), fecundity (84.600±1.528), hatching rate (41%) compared to other hormone treatments. Performance of hormone treatment 40 IU PMSG + 0,01 mg AD + 0,1 mg rElGH when compared with the results of ablation showed that the number of shrimp mature gonad reached 86%, the percentage of spawning shrimp 93%, fecundity 87%, and hatching 73%. Recombinant growth hormone has no effect on the growth of shrimp weight (P>0,05), but significant effect on fecundity and hatching rate (P<0,05). PMSG hormone, rGH, and antidopamin can induce gonadal maturation in shrimp vaname. Induction hormonal ablation may be an alternative technique in gonadal maturation in shrimp vaname.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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