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: Rekayasa Hormonal pada Udang Vaname Selama 14 Hari sebagai Pengganti Teknik Ablasi Mata dalam Usaha Percepatan Pematangan Gonad
Abstrak: Induction of gonadal maturation with eyestalk ablation was commonly technique used in the production of shrimp seed. unfortunately, eyestalk ablation technique opposed by animal lovers with issues of animal welfare. In this research, hormonal induction for gonadal maturation of white shrimp was done as an effort to replace the ablation technique. Hormonal induction performed using hormonal pregnant mare serum gonadotropin (PMSG), recombinant growth hormone (rGH), and antidopamin, which was given through the diet for 14 days. Shrimp got a treat: A. 40 IU PMSG/kg shrimp + 0.01 mg antidopamin/kg shrimp; B. 80 IU PMSG/kg + 0.02 mg antidopamin shrimp/kg shrimp; C. 40 IU PMSG/kg shrimp + 0.01 mg antidopamin/kg shrimp + 0.1 mg rGH/kg shrimp; D. 80 IU PMSG/kg shrimp + 0.02 mg antidopamin/kg shrimp + 0.1 mg rGH / kg shrimp; E. Ablation; and F. Control, where each treatment consisted of 15 shrimp. Results showed that shrimp fed treatment B gave the best results among hormone treatments where shrimp can mature gonads from day 14 to the total shrimp mature gonads by 47% up to day 28. On shrimp given treatment C and D tend to have weight fecundity and growth hormone treatment was higher than other woods. However, ablated shrimp begin to mature gonads at day 7 with total shrimp mature gonads was 93%. Recombinant growth hormone has effect on the growth of shrimp weight (P<0.05). Giving PMSG and antidopamin can stimulate gonadal maturation of shrimp. The addition of the combination hormone rGH and antidopamin PMSG can increase fecundity and weight of shrimp broodstock. PMSG and antidopamin can be substitute ablation technique in inducing gonadal maturation in shrimp.
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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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