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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis Biotropika
Gede S. Sumiarsa
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Immunology & microbiology Library & Information Science

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Performansi Biologis Induk Bandeng (Chanos chanos forskall) Hasil Seleksi dalam Mendukung Domestikasi dan Pengembangan Budidaya di Tambak Tony Setia Dharma; Gigih Setia Wibawa; A.A Kt. Alit; Gede S. Sumiarsa
Biotropika: Journal of Tropical Biology Vol 7, No 2 (2019)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.biotropika.2019.007.02.6

Abstract

Bandeng merupakan ikan yang memiliki rasa daging yang enak, harga relatif terjangkau oleh segala lapisan masyarakat dapat dibudidayakan secara polikultur dengan komoditas lainnya dan banyak petani yang melakukan usaha budidaya. Kendala di masyarakat bahwa pertumbuhan benih bandeng yang dihasilkan oleh pembenih memiliki variasi ukuran yang tinggi, dan pertumbuhan yang lambat di tambak. Tujuan dari penelitian adalah untuk mengetahui teknologi budidaya ikan bandeng, dan memperoleh data biologi induk bandeng G-1. Hewan uji yang digunakan adalah induk bandeng G-1. Penelitian dilakukan secara deskriptif, yaitu melakukan pengamatan secara fenotipik meliputi pertumbuhan setiap dua bulan sekali. Parameter yang diamati adalah beberapa aspek biologi bandeng hasil seleksi antara lain kualitas telur, sintasan, pertumbuhan, pengujian warna, kualitas daging, toleransi terhadap lingkungan, dan ketahanan terhadap penyakit. Hasil penelitian menunjukkan bahwa daya tetas telur berkisar 80-90,30%, dan memiliki ketahanan larva (SAI) mencapai 4,0-4,6 hari setelah menetas. Kelangsungan hidup dan pertumbuhan benih G-2 pada pembenihan umur 14-16  hari (SR) mencapai 60-85%, panjang total (TL) 1,68-1,72 cm, Warna induk bandeng dan ukuran konsumsi dengan menggunakan adalah hijau pada nomor TC.4408 dan perak TC.5501. Kualitas daging dari bandeng G-1 memiliki nilai 8. Kadar histamin untuk semua lokasi budidaya ND (non-detections). Toleransi benih terhadap lingkungan, ikan bandeng memiliki ketahanan terhadap salinitas 0-45 ppt, suhu 20-40°C, pH 6-9, dan oksigen lebih dari 2 ppm, kemudian memiliki ketahanan terhadap penyakit.
OPTIMALIZATION OF FEED DOSAGE AND FREQUENCY IN PRODUCTION OF ROTIFER (Brachionus rotundiformis) Rina P. Astuti; Sophia L. Sagala; Gunawan Gunawan; Gede S. Sumiarsa; Philip T. Imanto
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 4 No. 2 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.113 KB) | DOI: 10.29244/jitkt.v4i2.7786

Abstract

The availability of rotifer as live food is importance in a larval mariculture. Therefore a continuous and high production of rotifer is needed. The study was aimed to determine the frequency and dosage of the best food in rotifer culture. Nannochloropsis oculata, yeast and scott’s emulsion are used as potential feeds for rotifer. Three dosages of N. oculata (150,000; 250,000, and 350,000 cells/ind.rotifer/day) were applied in the study and were given twice per day. Meanwhile, yeast(0.5 g/106 ind./day) and Scott’s emulsion with different dosages (2, 4, and 8 μg/106 ind./day) were given with two different feeding frequencies (two and four times a day) for each dosages. Each treatment was done in triplicates. Sampling of rotifer was conducted in the morning (AM) and afternoon (PM). Water quality (temperature, dissolved oxygen and ammonia) was also measured. Growth and productivity of rotifer were determined from the number of rotifer and the number of rotifer eggs, respectively. The results showed that the optimum productivity of rotifer was achieved by giving N. occulata of 250,000 sel/ind/day, twice a day in four days culture. Meanwhile, treatment with yeast and Scott’s emulsion gave best performance when applying 0.5 g/106 and 2 μg/106 ind./day twice per day, respectively. Yeast and scott’s emulsion treatment yielded optimum production in two days of culture.Keywords: rotifer, productivity, yeast, Scott’s emulsion, foodd dosage
ABUNDANCE OF DIATOM AT THE GUMILAMO AND MAGALIHO ISLAND, NORTH HALMAHERA Rina Puji Astuti; Philip Teguh Imanto; Gede S. Sumiarsa
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 4 No. 1 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.859 KB) | DOI: 10.29244/jitkt.v4i1.7810

Abstract

Observation on abundance of diatom has been conducted in Gumilamo-Magaliho waters, North Halmahera. The aims of this study were to identify and analyze daily fluctuations of diatom abundance also analyze the biological indices in the plankton in that waters and . Sampling was conducted at three stations representing the strait, mangrove areas and estuary. Plankton were collected using a plankton net no.25. Sampling was carried out for 24 hours with six hour interval. Identification and counting of cells using a microscope with 400x magnification. The results showed that seven genera of diatoms were found: Chaetoceros sp. with the highest of cells abundance (5.061 cells/L), successively followed by Nitzschia sp. (611 cells/L), Thalassionema sp. (569 cells/L), Skeletonema sp. (446 cells/L), Coscinodiscus sp. (176 cells/L), Navicula sp. (40 cells/L) and Amphora sp. (11 cells/L). At station I and II showed that the maximum abundance occurred at 6 am, and the minimum abundance occurred at 6 pm. At station III the maximum abundance occurred at midnight and a minimum abundance occurred at noon. Diatoms showed different daily fluctuations at different time and stations. The supporting diversity index value of medium, low uniformity, and no dominance factor causing the Gumilamo-Magaliho waters can be developed for aquaculture.Keywords: diatom, diatom abundance
Co-Authors A.A Kt. Alit Gigih Setia Wibawa Gunawan Gunawan Philip T. Imanto Philip Teguh Imanto Rina P. Astuti Rina Puji Astuti Sophia L. Sagala Tony Setia Dharma