Judul: Utilization of Zeolite and Active Carbon in a Closed Transportation of Tilapia Seed Strain BEST Oreochromis sp. with a High Density.
Abstrak: Dalam penyelenggaraan usaha pembesaran ikan, seringkali benih-benih yang memenuhi syarat diperoleh dari tempat pembenihan yang letaknya berjauhan dari tempat pembesaran. Sistem pengangkutan yang umum yaitu sistem transportasi tertutup dengan jarak pendek dan kepadatan ikan terbatas. Maka diperlukan suatu sistem pengangkutan yang dapat memindahkan benih ke tempat pembesaran jarak jauh, dengan kepadatan tinggi dan tingkat kelangsungan hidup yang tinggi. Penelitian ini menggunakan kombinasi zeolit 20 g/ℓ dan karbon aktif 10 g/ℓ pada benih ikan nila BEST ukuran rata-rata 0,22 g/ekor dengan kepadatan tinggi. Penambahan material zeolit dan karbon aktif ini diharapkan dapat mempertahankan kualitas air selama pengangkutan, sehingga kepadatan tinggi dapat dicapai. Penelitian ini bertujuan untuk menentukan efektifitas zeolit dan karbon aktif dalam mempertahankan kualitas air pada pengangkutan tertutup sehingga dapat mengetahui kepadatan optimal benih ikan nila BEST yang diangkut selama 16 jam dan meminimalisir tingkat kematian pasca pengangkutan. Tahapan penelitian dimulai dari mengukur tingkat konsumsi oksigen, laju eksresi amoniak, kemampuan puasa ikan, penentuan kepadatan optimum benih ikan nila BEST pada transportasi tertutup. Transportasi dilakukan selama 16 jam dan pemeliharaan pasca transportasi selama 14 hari untuk perlakuan dengan kepadatan 300, 500 dan 700 ekor/ℓ. Hasil penelitian menunjukan perlakuan 300 ekor/ℓ lebih efektif dibandingkan perlakuan lainnya dengan tingkat kelangsungan hidup selama pengangkutan sebesar 96%, LPH paling tinggi 5,96% dan tingkat kelangsungan hidup pascatransportasi sebesar 85%. Namun demikian dilihat dari keuntungan perlakuan 700 ekor/ℓ lebih baik mencapai Rp 86.280 dengan tingkat kelangsungan hidup sebesar 79% selama pengangkutan 16 jam.
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Judul: Efektivitas Penambahan Zeolit, Karbon Aktif, dan Minyak Cengkeh dalam Transportasi Tertutup Ikan Nila BEST Oreochromis sp. dengan Kepadatan Tinggi.
Abstrak: Fish transportation was usually held at high density to efficient the transportation cost, but higher density of fish carried inside the container will be increase stress level of fish. Some stress will result in increased activity of fish physycology that could worst the water quality especially DO, CO2, and NH3. An attempt done to neutralize toxic ammonia that is by adding zeolite and active carbon to packing medium, and adding clove oil can condition the fish in a state of calm. Transportation is carried out for 24 hours and 20 days old maintenance with the packing of BEST tilapia fish seed 2-3 cm size with a density 700 fish/ and add the ingredients according to the dosage of 20 g of zeolite, 10 g of activated carbon. Treatment difference is the addition of clove oil dosage is 12 , 24 , 36 , and 48 . The results showed the addition of the treatment dose of clove oil 24 is more effective than other treatments with the SR of 93.36 %. It is also seen on the water quality better than other treatments, TAN 2.73±0.07, NH3 0.0137±0.0004, CO2 39.95±0, temperature 24.75±1.06, pH 6.98±0, and DO 2.20±0. Value of SR seed maintenance post treatment for 20 days was 97.12 %, higher than other treatments, with the rate of daily weight of 8.74 % and the cost for transportation of IDR 47.70, -.
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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