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PROFIL BAKTERI TOTAL BERDASARKAN KEDALAMAN WADUK JATIBARANG SEMARANG Profile of Total Bacteria Base On Depth in the Jatibarang Reservoir, Semarang Widya, Devita Aristya Sri; Suprapto, Djoko; Ain, Churun
Management of Aquatic Resources Journal (MAQUARES) Vol 8, No 4 (2019): MAQUARES
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (873.988 KB) | DOI: 10.14710/marj.v8i4.26551

Abstract

Perairan waduk memiliki karakteristik secara vertikal yang dipengaruhi oleh masuknya sinar matahari ke perairan.  Karateristik ini memberikan pengaruh terhadap kualitas air. Salah satu yang mendapatkan pengaruh adalah keberadaan bakteri di perairan. Bakteri adalah mikroorganisme air yang berperan dalam proses dekomposisi di perairan. Tujuan penelitian ini adalah untuk mengetahui total dan profil bakteri di Waduk Jatibarang berdasarkan kedalaman. Penelitian dilakukan pada 27 Maret 2019. Metode penelitian yang digunakan adalah metode deskriptif dengan pendekatan studi kasus. Teknik pengambilan sampel menggunakan metode purposive sampling, yang dilakukan di tujuh stasiun dengan tiga titik kedalaman (permukaan, tengah dan dasar). Perhitungan bakteri total dilakukan berdasarkan SNI Nomor 2332.3.2015 tentang Uji Mikrobiologi-bagian 3: Penentuan Angka Lempeng Total (ALT). Pengelolaan data menggunakan aplikasi SPSS 20 dan analisis sebaran menggunakan Ocean Data View 4. Berdasarkan perhitungan bakteri total di Waduk Jatibarang, total bakteri di permukaan waduk berkisar antara 1,9 × 103 – 1,5 × 105 CFU/ml, pada tengah yaitu 1,3 × 102  – 1,5 × 104 CFU/ml dan pada dasar 1,5 × 103  – 2,7 × 104 CFU/ml. Analisa sebaran bakteri total di Waduk Jatibarang menunjukkan bahwa terdapat kecondongan perbedaan stratifikasi secara vertikal.Reservoir have vertical characteristic be affected by entering sunlight in to waters. This characteristic effected to water quality, such as total bacteria. Bacteria is water microorganism that being a decomposer in the decomposition process. The purpose of this research is to know the consentration and profile of total bacteria base on depth in the Jatibarang Reservoir. The research was conducted on March 27th 2019. The research methods use descriptive methods with case study, and technical sampling methods using purposive sampling in seven stations with three points of depth water (surface, middle, and bottom). Accounting of total bacteria is base on the Standard National of Indonesia Number 2332.3.2015 about Microbiology Analisis-Chapter 3: Plate Number Determintion. Data processing use software SPSS 20 and distribution analysis with Ocean Data View 4. Base on the results, total bacteria in the surface level is 1,9 × 103 – 1,5 × 105 CFU/ml, in the middle is 1,3 × 102  – 1,5 × 104 CFU/ml. Total bcteria in the bottom level is  1,5 × 103  – 2,7 × 104 CFU/ml. Distribution analisis total bacteria in the Jatibarang reservoir show that there is different stratification of total bacteria in tendency vertically.  
The effect of the color of the rearing container on the growth and survival of tambaqui (Colossoma macropomum) Fikri, Andrian; Febri, Suri Purnama; Komariyah, Siti; Maulida, Cici; Aprita, Ika Rezvani; Nazlia, Suraiya; Setyawan, Febby Hadi; Pulungan, Ahyar; Widya, Devita Aristya Sri
Jurnal Perikanan Terpadu Vol 6, No 2 (2025): Jurnal Perikanan Terpadu Volume 6 Nomor 2
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jpterpadu.v6i2.13502

Abstract

Tambaqui (Colossoma macropomum) is a commodity with high economic value because it is a consumption fish. The purpose of this study was to analyze the effect of different colors of rearing containers on the growth and survival of freshwater pomfret fry. The method used in this study was an experimental method with 4 treatments repeated 3 times. In each treatment, a different color was given: P1 = transparent (control), P2 = black, P3 = blue, P4 = green. The results of these treatments significantly affected absolute weight growth, absolute length growth, and daily growth rate. Meanwhile, the survival rate and feed conversion ratio did not have a significant difference. The highest absolute weight growth was found in P3 at 13,67g, while the lowest absolute weight growth was found in P1 at 8,75g. The highest absolute length growth was found in P3 at 3,49cm, while the lowest absolute length growth was found in P1 at 2,39cm. Meanwhile, the highest daily growth rate was found in P3 at 34,18g, while the lowest daily growth rate was found in P1 at 21,88g. From the results of providing different container colors in the maintenance container, the brighter the color used, the better the resulting growth is categorized