Judul: Evaluation Sperm Quality of Garut Ram on Individual and Various Egg Yolk.
Abstrak: The purpose of this research was to know the effect of Gamt ram individual on quantity and quality of fresh and liquid semen. The research was also to study the effect of various egg yolk on quality of liquid semen which stored at 5 °c for five days. Another purpose was to study the economic aspect of various egg yolk as semen extender. This research was conducted at the Animal Husbandary and Cultivation Laboratory, Agency for the Assessment and Aplication of Technology (BPPl) and Lesan Putra Sheep Farm, Ciomas Bogor on June to July 2003. Semen was collected from three Garut rams. They are Rangga (BW~83 kg), Warok and Boris (BW~86,3 kg). Tris-citrate extender containing 20% various egg yolk as treatment i.e. quail, hen, native chicken aod duck eggs. Quality of chilledsemen including: motility, live sperm and intact plasma membrane (MPU) were evaluated every day for five days. Completely random design was used in this research. The first treatment were consist of three treatment of Garut sheep with three replication. Second treatment were consist of four treatment of egg yolk with nine replication. The result was analized with ANOVA and Tuckey's test were used for different result between the treatment. Result indicated that there was no significantly difference between rams on quality of fresh semen and chilled-semen. There was no significantly between egg yolk for mean percentages of motility, live spenn and intact plasma membrane. Triscitrate extender containing hen egg yolk is the lower cost than others. Key word: Gamt rams, semen extender, Tris-citrate, egg yolk, hen egg yolk, duck egg yolk, quail egg yolk, native chicken egg yolk
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Judul: Kualitas Spermatozoa Cauda Epididimis Domba Garut yang diberi Pakan Limbah Tauge dan Indigofera sp pada Pengencer Tris Kuning Telur
Abstrak: Feed is one of the important factor to improve the quality of spermatozoa. Feed can be made from waste bean sprout and legume Indigofera sp. Garut ram has high economic value, but it is faced with the problem of limited number of a good quality of male. One of method that can be used to solve a problem is the utilization of cauda epididymal sperm since it has motility and an able to fertilize oocytes as well as ejaculated sperm. The purpose of this research was to determine the effect of feeding (waste bean sprout and Indigofera sp) to increase the quality of garut ram sperm. This research used 8 garut male with age around 11 months and had been raised for 3 months. They were divided into two groups, the first group was fed with 30% waste bean sprout and the second group was fed with 30% Indigofera sp. Parameter of semen quality was analyzed as follow: for the volume, color and consistency were expressed by descriptively, while testis weight, sperm concentration and cytoplasmic droplet were tested by T-test and followed by regression test for correlation between testis weight and sperm concentration. Sperm motility, sperm viability, integrity of sperm plasma membrane and secondary abnormality were analyzed using Completely Randomized Design, Faktorial (2x4) with four replication. The first factor was type ration (waste bean sprout and Indigofera sp) and the second factor was storage time (day 0, 1st, 2nd, 3th). Data was analyzed by analysis of variance and continued with Duncan test to observed the different between treatments. Results of the experiment showed that volume, color and consistency of semen were same in all treatments, while testis weight, sperm concentration and cytoplasmic droplet were not significant different in type ration treatments by T-test (P>0.05). There were no correlation between testis weight and sperm concentration (P>0.05) and expressed as Y = 5654.26 - 3.96X ; R2 = 0.003. Furthermore sperm viability were significant different in all treatments by analyzed of variance (P<0.05). The integrity of sperm plasma membrane and sperm motility were significant different in storage time treatment (P<0.05), but were not significant different in type ration by analyzed of variance (P>0.05). It can be summarized that both of 30% waste bean sprout and 30% Indigofera sp feed treatments were not significantly influence on all of parameter sperm quality.
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Judul: Bifurkasi lokal pada titik tetap non-hiperbolik
Abstrak: Bifurkasi menggambarkan perubahan pada struktur orbit di sekitar titik tetap. Titik tetap dibagi menjadi dua yaitu titik tetap hiperbolik dan titik tetap non-hiperbolik. Titik tetap non-hiperbolik terjadi jika ada nilai eigen dengan bagian real sama dengan nol. Kestabilan dari titik tetap dapat diketahui dari nilai eigen yang diperoleh dari pelinearan medan vektor. Pada bifurkasi satu-dimensi ditemukan kasus-kasus untuk bifurkasi saddle-node, bifurkasi transcritical dan bifurkasi pitchfork. Bifurkasi saddle-node terjadi jika satu sisi dari nilai parameter tidak terdapat titik tetap dan pada sisi lain terdapat dua titik tetap, dimana yang satu stabil dan yang lainnya tak-stabil. Bifurkasi transcritical terjadi jika terdapat pertukaran kestabilan, yaitu dari titik tetap stabil menjadi titik tetap tak-stabil dan sebaliknya. Sedangkan bifurkasi pitchfork dibagi menjadi dua, yaitu: bifurkasi pitchfork supercritical dan bifurkasi pitchfork subcritical. Bifurkasi pitchfork supercritical terjadi jika satu titik tetap stabil berubah menjadi dua titik tetap stabil dan satu titik tetap tak-stabil, dan bifurkasi pitchfork subcritical terjadi jika satu titik tetap stabil dan dua titik tetap tak-stabil berubah menjadi satu titik tetap tak-stabil. Bifurkasi Hopf (bifurkasi dua-dimensi) terjadi jika terdapat orbit periodik pada struktur orbitnya yang berupa lingkaran dengan jari-jari konstan. Ada atau tidaknya orbit periodik dapat diketahui setelah sistem ditransformasikan ke dalam koordinat polar. Orbit periodik ini dapat bersifat stabil maupun tak-stabil. Model periklanan (advertising) Feichtinger merupakan salah satu contoh penerapan bifurkasi Hopf Model ini menghasilkan satu titik tetap dan orbit periodik yang bersifat stabil.
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