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All Journal Jurnal Ilmu-Ilmu Perairan dan Perikanan Indonesia Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati
Dedi Soedarma
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences

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EVALUASI PENEBARAN UDANG GALAH (Macrobrachium rosenbergii) DI WADUK DARMA, JAWA BARAT Didik Wahju Hendro Tjahjo; Mennofatria Boer; Ridwan Affandi; Ismudi Muchsin; Dedi Soedarma
Jurnal Ilmu-Ilmu Perairan dan Perikanan Indonesia Vol. 11 No. 2 (2004): Desember 2004
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.705 KB)

Abstract

Evaluasi keberhasilan penebaran udang galah (Macrobrachium rosenbergii) di Waduk Darma yang memiliki luas genangan 400 ha telah dilaksanakan berdasarkan penebaran dari April 2002 sampai Maret 2003. Udang galah yang ditangkap dengan jaring lempar mencapai 57 - 624 ind/bulan atau sama dengan 1.3 - 35.0 kg/bulan. Metode yang digunakan adalah metode survei dengan penarikan contoh acak berlapis. Hasil penelitian menunjukkan bahwa kualitas perairan di Waduk Darma baik fisika maupun kimia mendukung pertumbuhan udang galah. Pada kondisi tersebut laju pertumbuhan udang galah cukup tinggi dengan koefisien pertumbuhan K antara 0.88 - 1.59 dan L∞ sama dengan 36.2 cm untuk jantan, K antara 0.87 - 1.55 dan L∞ sama dengan 25.9 cm untuk betina. Kondisi makanan yang tersedia cukup untuk pertumbuhan. Interaksi dengan komunitas ikan lainnya relatif rendah. Keberhasilan penebaran mencapai 10.5% dengan laju eksploitasi antara 0.06 sampai 0.80.Kata kunci: Macrobrachium rosenbergii, penebaran, pertumbuhan, penangkapan, waduk.
Aktivitas Antibakteri Ekstrak Karang Lunak Sarcophyton sp. yang Difragmentasi dan Tidak Difragmentasi dari Perairan Pulau Pramuka, Kepulauan Seribu, Jakarta Mujizat Kawaroe; Dedi Soedarma; Hefni Effendi; Tati Nurhayati; Safrina Dyah Hardiningtyas
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 15, No 3 (2010): October 2010
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v15i3.2588

Abstract

Fragmented and non-fragmented soft corals showed antibacterial activities. Soft corals were gradually extracted using methanol, ethyl acetate, and hexane. Crude extract of the samples was tested its antibacterial activity, Minimun Inhibitory Concentration, toxicity (Brine Shrimp Lethality Test method), and phytochemicals. Overall, the antibacterial activity of crude extract of non-fragmented soft coral Sarcophyton sp. was higher than the crude extract of fragmented soft coral Sarcophyton sp. Crude ethyl acetate extract showed higher antibacterial activities. The ethyl acetate crude extract of non-fragmented soft coral Sarcophyton sp. is able to inhibit all tested bacteria is E. coli, S. aureus, P. aeruginosa and B.cereus, while the ethyl acetate crude extract of fragmented Sarcophyton sp. is unable to inhibit bacteria P. aeruginosa. Minimum inhibitory concentration extracts of non-fragmented Sarcophyton sp. in range 240−480 μg/disc. The 24-h LC50 extracts of fragmented and non-fragmented Sarcophyton sp. for Artemia salina were 149.50 ppm and 45.15 ppm, respectively. Bioactive compounds of fragmented and non-fragmented Sarcophyton sp. extract are steroid, flavonoid and alkaloid.
Co-Authors Charles Parningotan Haratua Simanjuntak Didik Wahju Hendro Tjahjo Hefni Effendi Ismudi Muchsin Mennofatria Boer MUJIZAT KAWAROE RIDWAN AFFANDI TATI NURHAYATI