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The promotive and suppressive effects of coexistence of bacterial strains on the growth of a diatom Chaetoceros gracilis were investigated under laboratory conditions. Tested bacterial strains were isolat ed from the diatom mass culture tanks at a kuruma prawn farm. To evaluate the effect of each bacterial strain, the growth pattern was compared between cultures with and without bacterial medium addition.In diatom growth with the coexistence of Flavobacterium sp. in the ASP6 medium, the diatom cell yield during a 16-day culture period and specific growth rate were high compared to axenic culture as a control, whereas the duration of lag time and the variation among daily cell densities from four repli cate cultures were as small as those in the control. These facts indicate that this bacterium greatly pro motes diatom growth. However, four tested strains had no apparent effect and seven strains had a sup pressive effect.

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Penelitian ini dilaksanakan pada 13 desa di Kecamatan Samarinda Ilir dengan obyek potensi usaha masyarakat. Tujuan penelitian adalah untuk mengidentifikasi potensi sumberdaya ekonomi lokal yang berdaya tarik, berdaya saing tinggi dan berpotensi menciptakan lapangan pekerjaan. Data dikumpulkan melalui focus group discussion dengan masyarakat. Metode analisis yang digunakan adalah analisis deskriptif kualitatif. Hasil penelitian menunjukkan bahwa usaha ekonomi produktif unggulan yang berpeluang besar membuka lapangan kerja adalah sektor perdagangan, industri rumah tangga, jasa dan pertanian.