Judul: Thymol Addition in Feed to Catfish Clarias sp. Growth Performances
Abstrak: Minyak esensial dapat dijadikan feed additive alami untuk pakan ikan karena dapat meningkatkan pertumbuhan. Penelitian ini bertujuan untuk meningkatkan kinerja pertumbuhan ikan lele dengan menambahkan berbagai dosis timol pada pakan ikan. Penelitian menggunakan empat perlakuan sebagai bahan suplementasi yaitu 0%, 0,1%, 0,2%, dan 0,3% timol. Pakan yang digunakan adalah pakan apung lele komersil. Ikan lele berukuran 1,67±0,04 g dipelihara dalam akuarium berukuran 90×40×45 cm. Padat tebar yang digunakan adalah 30 ekor ikan per akuarium dan diberi pakan tiga kali sehari secara ad satiation selama 60 hari. Hasil penelitian menunjukkan penambahan 0,2% timol dalam pakan meningkatkan konsumsi pakan, retensi protein, retensi lemak, rasio efisiensi protein, laju pertumbuhan harian dan bobot ikan lele (P<0,05). Sehingga disimpulkan kinerja pertumbuhan ikan lele dapat meningkat signifikan setelah diberi pakan dengan penambahan 0,2% timol.
Keyword: Clarias sp., growth performance, thymol

Judul: Efektivitas Penambahan Mannan Oligosakarida dan Vitamin C sebagai Feed Additive terhadap Kinerja Pertumbuhan ikan lele (Clarias sp.)
Abstrak: This study aimed to test of addition mannan oligosakarida (MOS) and vitamin C as feed additive on growth performance of Catfish (Clarias sp.). The feed used in this study is comercial feed with 39.4% protein dry weight content with the addition of feed additive is 3.6 g/kg. A total of 15,000 catfish (0.268 ± 0.26 gram) was reared for 20 days in tank (3 x 6x 0.5 m3) which has been equiped with aeration system. Fish feeding was conducted three times at 06.00, 16.00 and 24.00 (at satiation). The experimental design was a completely randomized design with 2 treatments and duplicate. The result showed that the amount of feed intake, protein retension and daily growth rate not significantly different (P>0,05). However, the biomass, feed conversion ratio (FCR) and survival rate in catfish with addition of feed additive in feed have significantly different (P<0,05). This result showed that the addition of MOS and vitamin C in catfish feed can decrease FCR and increase final biomass and survival rate (SR).
Keyword: MOS, vitamin C, feed additive, growth performance, Clarias sp.

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