Judul: Deteksi Sel Donor Ikan Gurame Osphronemus gouramy pada Larva Ikan Nila Oreochromis niloticus sebagai Resipien dengan Teknik PCR
Abstrak: Ikan gurame (Osphronemus gouramy) memiliki pertumbuhan dan matang gonad yang lambat sehingga produksi benih menjadi terhambat. Aplikasi teknologi induk semang (surrogate broodstock) atau transplantasi sel diduga dapat mengatasi lambatnya ikan gurame matang gonad. Teknologi induk semang adalah teknologi transplantasi sel germinal donor ke rongga perut larva ikan resipien dan selanjutnya setelah ikan resipien matang gonad dan melalui pembuahan, maka ikan donor dapat diproduksi. Pada teknologi induk semang dibutuhkan ikan resipien yang cocok yang dapat menerima dan mendukung perkembangan sel gonad donor. Dalam rangka pengembangan induk semang untuk ikan gurame, ikan nila diduga sebagai kandidat utama untuk mencapai tujuan tersebut. Sebagai tahap awal dalam pengembangan teknologi induk semang, perlu dikembangan metode deteksi sel donor dalam ikan resipien. Sel donor umumnya diberi label gen GFP atau PKH-26 sehingga mudah dikenali menggunakan mikroskop fluoresen. Namun demikian, pembuatan ikan transgenik donor yang mengekspresikan gen GFP membutuhkan waktu yang lama sehingga cara tersebut dinilai kurang efisien. Selain itu, ketersediaan mikroskop fluoresen juga masih terbatas di Indonesia. Salah satu cara alternatif yang diduga efektif dalam mengidentifikasi sel donor adalah menggunakan PCR. Tujuan dari penelitian ini adalah untuk menentukan kemampuan PCR untuk mendeteksi sel donor dalam tubuh resipien. Sebagai pembanding, sel diberi label PKH-26.
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Judul: Transplantasi sel testikular ikan gurame Osphronemus gouramy pada ikan nila Oreochromis niloticus umur 1-4 hari
Abstrak: Giant gouramy is one of the targeted farmed species to increase its production level in the Indonesian Ministry of Maritime Affairs and Fisheries Program 2010-2014. Its production seemed slow because of the relatively long reproductive cycle. Transplantation of giant gouramy testicular cells to tilapia can be done in the hope that the surrogate broodstock (tilapia) will be able to give birth giant gouramy so the production cycle can be accelerated. In this research, transplantation of giant gouramy testicular cell (donor) in the peritoneal cavity of newly hatched tilapia (recipient) was performed. Giant gouramy testicular cells that contain spermatogonial cells obtained by dissociation of the gonad using PBS with 0.5% trypsin and then injected into tilapia with different ages. The results showed that SR (survival rate) of 1-2 days old injected larvae (A; 89.34%) were lower compared to that of 3-4 days old (B; 98.96%). Furthermore, the success rate of donor cells colonization in the recipient gonad at 2 months after injection in treatment A (6 of 6 recipients; 100%) was higher than that of treatment B (3 of 4 recipients; 75%). The results of this study indicated that transplantation using 1-2 days old larvae gave highest colonization and comparable level of SR. Thus, this technique has the potential both to manipulate gamet production of economically important fish species that relatively difficult to reproduction (commercial) and reproduce the endangered fish (as conservation).
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Judul: Socioeconomic and psychological variables influencing household debt
Abstrak: The overall objective of this study was to examine factors influencing total debt, total debt payment, and patterns of debt payments. The study examined the impacts of both psychological (credit attitudes and perception of future income) and socioe- conomic variables on total debt, total debt payment and patterns of debt payments. A conceptual model for this study was developed by incorporating the theory of borrower risk, the economic and psychological economic theory of borrowing, and the results of previous studies. This model identifies socioeconomic and psycholog- ical variables that influence total debt, total debt payment, and patterns of debt payments. Socioeconomic variables included in the model are gender, race, mari- tal status, employment status, household size, age, education, and household assets. Psychological variables are credit attitudes toward the use of credit, and perception of future income. This study used data from the 1989 Survey of Consumer Finances. The survey was sponsored by the Federal Reserve in cooperation with some other federal agencies. Data for the survey were collected by the Survey Research Center at the University of Michigan between August 1989 and March 1990. dst ...
Keyword: Gender