Limbah cair industri tahu akan berpengaruh terhadap badan air apabila langsung dibuang tanpa dilakukan pengelolaan terlebih dahulu, dan menyebabkan masalah terhadap kualitas air dan kehidupan biota akuatik. Penelitian ini bertujuan untuk menguji dampak konsentrasi limbah cair industri tahu terhadap kualitas air, pola renang dan tingkah laku ikan. Penelitian dilakukan dengan uji coba di Laboratorium menggunakan akuarium dan dianalisis secara deskriptif. Adapun perlakuan yang dicobakan adalah limbah cair tahu dengan konsentrasi 0%; 0,4%; 0,6%; 0,8%; 1,0% dan 1,2% dari volume air 10 liter. Setiap akuarium diisi ikan sebanyak 24 ekor dengan ukuran 4-5 cm. Metode Pengamatan dilakukan selama 96 jam. Hasil pengukuran kualitas air pH, DO, CO2, COD, TSS dan H2S melebihi standar baku mutu, sedangkan suhu, BOD5 dan amoniak masih dibawah standar baku mutu. Tingkah laku ikan bergerak menghindari limbah, perilaku bergerombol sedangkan pola renang ikan berenang dipermukaan, berenang tidak beraturan, pola renang berubah dengan posisi berdiri. Konsentrasi limbah cair tahu 0,4%; 0,6%; 8%; 1,0% dan 1,2% berpengaruh terhadap pola renang dan tingkah laku ikan.
Kualitas air, pakan alami berupa phytoplankton dan zooplankton digunakan sebagai indikator kesuburan perairan yang berpengaruh terhadap usaha budidaya. Penelitian bertujuan untuk mengetahui kuantitas, kualitas phytoplankton dan zooplankton di kolam pasca tambang batubara. Metode penelitian yaitu dengan pengamatan kualitas air secara in situ dan ex situ dilakukan di kolam pasca tambang batubara Loa Bahu. Pengambilan sampel plankton setiap 3 hari sekali selama 10 kali. Sampel plankton di bawa ke laboratorium untuk diidentifikasi jenisnya, dihitung kelimpahannya, indeks keanekaragaman, keseragaman dan dominansi. Hasil analisis menunjukkan menunjukkan bahwa jumlah phytoplankton 3.039–3.379 indv/liter, zooplankton 4508–5146 indv/liter. Phytoplankton didominasi oleh Chlorophycea yang mencerminkan kualitas air bersih. Indeks keanekaragaman plankton 2,718 – 2,684, termasuk kondisi sedang, Keseragaman 0, 8419–0, 8618, termasuk kategori stabil. Hasil analisis kualitas air seperi suhu, oksigen terlarut, pH, NO2, H2S masih layak untuk budidaya, sedangkan untuk NH3 melebihi standar.
Tambak merupakan salah satu habitat yang dipergunakan sebagai tempat untuk kegiatan budidaya air payau di daerah pesisir. Kegiatan budidaya yang dilakukan mengalami masalah. Salah satu masalah yang dihadapi petambak di Bontang Kuala saat ini adalah penurunan produksi. Tujuan dari penelitian ini adalah mengindentifikasi kondisi tambak yang berhubungan dengan kesuburan tambak, yaitu secara fisik, kimia dan biologi, dan analisis kualitas tanah. Metode penelitian yaitu dengan menganisis kualitas air secara in situ dan exsitu. Parameter yang dianalisis secara in situ yaitu: suhu, pH, oksigen terlarut, salinitas; sedangkan parameter yang dianalisis di laboratorium yaitu: TDS, NO3, NO2 dan NH4, pH tanah, bahan organik, N, P tanah, sedangkan untuk melihat keanekaragaman plankton dilakukan pengambilan sampel air untuk indentifikasi di laboratorium. Hasil analisis kualitas air dibandingkan dengan baku mutu lingkungan Prov.Kaltim No.339 Tahun 1988 (Baku mutu air laut untuk biota laut, budidaya perikanan). Kualitas air secara fisik dan kimia masih sesuai dengan standar untuk budidaya, bahan organik tanah tinggi sedangkan secara biologi keanekaragan plankton termasuk dalam kategori sedang.
Pearl catfish has the main advantage of fast growth. To maximize this growth, one of the things that must be considered is the feed given. The use of factory feed for catfish seeds is common, so it is necessary to use feed raw materials that are around to be used as raw materials for homemade feed. Vegetable waste such as cabbage and tofu dregs can be used as fish feed which is processed into pellets. Cabbage vegetable waste, tofu dregs, bamboo shoots and bran have protein and carbohydrates that can be used for fish growth. This study consisted of 2 stages, namely stage 1 analyzing the comparison between factory feed and homemade feed and stage 2 analyzing the difference in dosage of homemade feed on the growth and efficiency of pearl catfish (C. gariepinus) seed feed. Data were analyzed using 2 independent samples (unpaired) t-test and ANOVA test. The results showed that the provision of factory feed and homemade feed did not have a significant effect on the growth of length, weight, and feed efficiency of catfish fry. Catfish seeds can be fed homemade feed with ingredients from fermented cabbage waste, tofu dregs flour, rebon flour, bran flour, plus vitamins and minerals. The results of the analysis of variance in the treatment of different feed doses (4%, 5%, 6%, 7%, and 10% per fish body weight), had a significant effect on the growth of catfish length and weight, and had no significant effect on feed efficiency. The higher the dose given for the maintenance period of 30 days of catfish fry gave a good effect with the best dose of 10% per fish body weight
<p>Background The phenomenon of women working outside the home is no longer a foreign of conversation. Objective The purpose of this research is to describe the struggle of the female head of the house to survive to support the family. Methods This research uses a qualitative approach with a case study method. The research data is in the form of observations and interviews with 10 female heads of households who live in Samarinda City. Results Based on the results of observations and interviews, economically the poverty that occurs in female heads of household is due to: a) There is no good management from the government related to human resources so that assistance does not run optimally. b) Lack of ownership of land assets, decent housing for families, salary erratic activities that interfere with the activities of women heads of households, c) The lack of working capital that is currently being carried out, economic activities are carried out with minimal capital, d) There are no business facilities, women heads of households only rely on capital assistance, and e) Economic efforts for survival has not been maximized and there is no good management from the government. Conclusion Female heads of households need not only capital intake but also assistance to improve life skills to create family resilience. Implication practice This research can be used as statistical data for female heads of households in formulating programs activities to alleviate poverty for female heads of households.</p>
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