Enan M. Adiwilaga
Departemen Manajemen Sumberdaya Perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor

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HUBUNGAN ANTARA KELIMPAHAN FITOPLANKTON DENGAN PARAMETER FISIK-KIMIAWI PERAIRAN DI TELUK JAKARTA -, Yuliana -; Adiwilaga, Enan M.; Harris, Enang -; Pratiwi, Niken T.M.
Jurnal Akuatika Vol 3, No 2 (2012): Jurnal Akuatika
Publisher : Fakultas Perikanan dan Ilmu Kelautan

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Fitoplankton mempunyai peranan yang sangat penting di dalam suatu perairan, selain sebagai dasar dari rantai pakan (primary producer) juga merupakan salah satu parameter tingkat kesuburan suatu perairan. Tujuan penelitian ini adalah mengetahui struktur komunitas dan kelimpahan fitoplankton di Perairan Teluk Jakarta serta mempelajari hubungan antara kelimpahan fitoplankton dengan beberapa parameter fisik-kimiawi perairan.  Penelitian dilaksanakan pada bulan Agustus, September, dan November 2009 di Teluk Jakarta, pada 9 (sembilan) stasiun dengan metode pengendapan.  Hasil penelitian menunjukkan bahwa ditemukan 47 genera dari 4 (empat) kelas fitoplankton yang terdiri atas 26 genera kelas Bacillariophyceae, 8 genera kelas Chlorophyceae, 7 genera kelas Cyanophyceae, dan 6 genera kelas Dinophyceae. Kelimpahan yang diperoleh berkisar antara 194.000 - 20.132.143 sel/l.  Kisaran nilai indeks-indeks biologi yang ditemukan adalah indeks keanekaragaman (H’) = 0,6148 - 2,2375, indeks keseragaman (E) = 0,2397 - 0,8614, dan indeks dominansi (D) = 0,1316 - 0,7498. Parameter fisika-kimia perairan berturut-turut adalah nitrat 0,0072 - 0828 mg/l, ortofosfat 0,0114 - 0,3480 mg/l, silika 0,2787 - 5,9946 mg/l, pH 7,59 - 8,73, suhu 26,40 - 31,80oC, dan salinitas 28,00 - 33,00.  Hasil analisis regresi linear berganda ditemukan bahwa terdapat keterkaitan yang sangat erat antara parameter fisika-kimia perairan dengan kelimpahan fitoplankton (R2 = 0,739) dengan persamaan regresi Y = - 53190202 + 330084 suhu - 199740 salinitas + 6103042 pH - 10442291 nitrat - 3275245 ortofosfat + 2545042 silika. Kata kunci :  fitoplankton, kelimpahan, dan Teluk Jakarta
Produktitvitas Diatom Perifitik yang Ditumbuhkan pada tipe Subtrat Berbeda Sebagai Alternatif Penyediaan Pakan Alami Udang Pratiwi, Niken T.M.; Adiwilaga, Enan M.; Widigdo, Bambang; Soedharma, Dedi
JURNAL BIOLOGI INDONESIA Vol 4, No 3 (2007): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

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ABSTRACTThe Productivity of Periphytic Diatom Grown on Different Types of Substrates asan Alternative on Providing Natural Feed for shrimp. Providing natural feed is anattempt to support fisheries culture in a polite way for the sustainability of environment.Periphytic community is living aquatic resources that have a potential value for thispurpose. The major component of saline water periphytic community is diatom.The study was emphasized on diatom presentation grown on two types of artificialsubstrates: biocrete (sand, palm fiber, cement) and zeocrete (zeolite, palm fiber, cement).The reseach was conducted in laboratory with an experimen design follows split splitplot in times. The aim of the research is to study the ecological factor and availablenutrients to support the growth of periphitic diatoms (Amphora, Cyclotella, Melosira,Navicula, Phaeodactylum, and Thallassiosira) on two different substrates. Theproductivity of diatom, and the effect of shrimp larvae on the diatom productivity werealso analyzed. Two fertilized materials (biocrete and zeocrete) with two main treatmentsand three levels of treatments each, and unfertilized materials were used as artificialsubstrates for periphitic diatoms. The results show that all treatment could give sufficientbiological available nutrient for the diatoms. The highest diatom productivity was achievedby the population on third level ratio of fertilized biocrete and zeocrete (added by fertilizedwith N:P ratio of 30:l). Diatom productivity follows the shrimp larvae grazing. Theshrimp larvae could grow well on the media with diatom that were grown on fertilizedbiocrete.Key words: periphytic diatoms, natural feed, biocrete, zeocrete, productivity
KELIMPAHAN ZOOPLANKTON DAN BIOMASSA IKAN TERI (Stolephorus spp.) PADA BAGAN DI PERAIRAN KWATISORE TELUK CENDERAWASIH PAPUA (Abundance of Zooplankton and Biomass of Anchovy (Stolephorus spp.) of Liftnet at Kwatisore Bay, Cendrawasih Gulf, Papua) Dinisia, Amelian; Adiwilaga, Enan M.; Yonvitner, .
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol 6, No 2 (2015): Marine Fisheries - November 2015
Publisher : Bogor Agricultural University

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ABSTRACTMillions of organisms can be found in the Cenderawasih Gulf National Park area, especially in the waters of the Kwatisore Bay, Nabire and has been well-known to almost all over the world. Large zooplankton is an important food for migrated fish larvae and all kinds of fish including anchovies. Anchovy is the food of large and small pelagic fish groups. Groups of fish that use plankton as food were included anchovy. The main catch product of lift net at the Kwatisore bay is anchovy (Stolephorus spp.). This study aims to assess the level of availability of anchovy in relation to the abundance of zooplankton as food and to analyze the influence of anchovy fishing activities with lift net fishing gear. The results were obtained 51 species of zooplankton, which consists of 44 types holoplankton and 7 types of meroplankton. There were 17 species of zooplankton were found in the stomach of anchovy with the subgroup dominated by copepods (73.51 %). Among 17 species of zooplankton there 2 types that were found in all four sampling periods, namely Calanus sp. 2 and Euterpina acutifrons. There is a relationship between the abundance of individual zooplankton in the waters of the anchovy biomass and also between the abundance of zooplankton and biomass of anchovy.Keywords: abundance of zooplankton, biomass of anchovy, lift net at Kwatisore-------ABSTRAKJutaan organisme dapat ditemukan dalam kawasan Taman Nasional Teluk Cenderawasih khususnya di perairan Kwatisore, Nabire dan telah terkenal sampai hampir ke seluruh dunia. Zooplankton berukuran besar merupakan makanan penting bagi ikan-ikan yang bermigrasi dan larva semua jenis ikan termasuk didalamnya ikan teri. Ikan teri merupakan makanan dari kelompok ikan pelagis besar dan kecil. Kelompok ikan-ikan yang banyak memanfaatkan plankton dari kelompok ikan pelagis kecil diantaranya ikan teri. Hasil tangkapan utama bagan penangkap ikan pelagis kecil di perairan Kwatisore ialah jenis teri (Stolephorus sp.). Tujuan penelitian ini adalah untuk mengkaji tingkat ketersediaan ikan teri dalam kaitannya dengan kelimpahan zooplankton sebagai makanannya serta menganalisis pengaruh dari aktivitas penangkapan ikan teri dengan alat tangkap bagan. Secara keseluruhan dari seluruh stasiun dalam setiap periode sampling, diperoleh 51 jenis zooplankton yang terdiri atas 44 jenis holoplankton dan 7 jenis meroplankton. Terdapat 17 jenis zooplankton yang ditemukan dalam lambung ikan teri dengan didominasi oleh Sub-grup Copepoda (73,51%). Diantara ke-17 jenis zooplankton tersebut terdapat 2 jenis yang ditemukan pada keempat periode sampling yaitu Calanus Sp.2 dan Euterpina acutifrons. Hasil analisis regresi linier antara biomassa ikan teri hasil tangkapan bagan dan kelimpahan maupun antara biomassa ikan teri hasil tangkapan bagan dan jumlah jenis zooplankton menunjukkan adanya korelasi positif.Kata kunci: kelimpahan zooplankton, biomassa ikan teri, bagan di Kwatisore
MEASUREMENT OF DISSOLVED INORGANIC NUTRIENT IN EUPHOTIC ZONE THE BANTEN BAY Alianto, Alianto; Adiwilaga, Enan M.; Damar, Ario; Harris, Enang
Indonesian Journal of Chemistry Vol 9, No 2 (2009)
Publisher : Universitas Gadjah Mada

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At a few this last years, measurement concentration of dissolved inorganic nutrient is has rapidlyed grow by using various methods. But method anything applied must based on at formation of indicator end of measurement amonia, nitrite, nitrate, orthophosphate and silicate. At measurement of amonia its indicator is formation of blue indophenol, nitrite formation of pink azo, nitrate formation of yellow colored solution, orthophosphate formation of blue molybdenum, and silicate based on formation of yellows silicomolibdate. The intensity of color that is highly dependent on the concentration of each element. Measurement of amonia blue indophenol intensity perfected concentration in the range 0.206-0.396 mg/L. Measurement nitrite the formation of a pink azo easy imperfect because its low concentration. Intensity measurements nitrate solution yellow perfect concentration in the range 0.128-0.989 mg/L. Measurement of imperfect blue molybdenum intensity orthophosphate because its low concentration. While measuring the formation silicate of yellow silicomolibdate  perfect concentration on the range 10.573-26.470 mg/L. As a whole from result of measurement is obtained chemical composition of dissolved inorganic nutrient in euphotic zone the Banten bay is more predominated by silicate 97.27%, nitrate 1.84%, amonia 0.49%, orthophosphate 0.20%, and nitrite 0.18%.   Keywords: blue indophenol, pink azo, yellow solution, blue molybdenum, yellow silicomolibdate
Status Limnologis Situ Cilala Mengacu pada Kondisi Parameter Fisika, Kimia, dan Biologi Perairan Pratiwi, Niken T.M.; Adiwilaga, Enan M.; Basmi, Johan; Krisanti, Majariana; Hadijah, Oji; K., Pieka Wulandari
Jurnal Perikanan Universitas Gadjah Mada Vol 9, No 1 (2007)
Publisher : Universitas Gadjah Mada

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The purpose of this research was to study the limnological status of Cilala reservoir, based on physical, chemical, and biological parameters. The observation comprised some morphometric of surface and vertical dimension, water quality measurements, plankton community structure, and primary productivity. Based on some morphometric condition, Cilala reservoir has a high potention of biological productivity, but the area of lake begins narrowing. The physical and chemical characteristic showed that Cilala reservoir was still in good condition. The condition of Total Suspended Solid (TSS) at inlet and the water debit of outlet showed that the waters has a relatively high potention of sedimentation that lead to a shallowing condition. There were found 95 genus of phytoplankton from seven classes (Bacillariophyceae, Chlorophyceae, Cyanophyceae, Chrysophyceae, Euglenophyceae, Pyrrophyceae, and Xanthophyceae). It was also found four major groups of zooplankton, i.e. Rotifera, Copepoda, Cladocera, and Protozoa. Although the primary productivity was relatively low, based on orthophosphate, chlorophyll-a, and Nygaard Index, the water was in mesotrophic-eutrophic status. As a whole, Cilala reservoir was still appropriate for fisheries activities.
KAJIAN KETERKAITAN ANTARA CADANGAN OKSIGEN DENGAN BEBAN BAHAN ORGANIK DI ZONA LAKUSTRIN DAN TRANSISI WADUK IR. H. DJUANDA Simarmata, Asmika H.; Adiwilaga, Enan M.; Lay, Bibiana W.; Prartono, Tri
Jurnal Penelitian Perikanan Indonesia Vol 14, No 1 (2008): (Maret 2008)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

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Kematian massal ikan pada budi daya ikan dalam karamba jaring apung di Waduk Ir. H. Djuanda hampir selalu terjadi setiap tahun. Deplesi oksigen merupakan faktor yang mempengaruhi kondisi tersebut. Oleh karena itu, penelitian ini dilakukan. Tujuan penelitian ini adalah untuk mengkaji atau menentukan kemampuan perairan dalam menerima beban bahan organik. Penelitian dilakukan di Waduk Ir. H. Djuanda dari bulan Juni 2003 sampai dengan Mei 2004, dengan interval pengambilan contoh setiap bulan. Pengambilan contoh dilakukan di wilayah lakustrin yaitu stasiun L1, L2, dan L3 dan wilayah transisi stasiun T1, T2, dan T3. Pengambilan contoh vertikal meliputi permukaan, kedalaman 7, 15, 25, dan 35 m, dan dasar perairan. Metode dalam penelitian ini adalah survei post fakto. Analisis contoh dilakukan di laboratorium produktivitas perairan, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor dan laboratorium kimia Loka Riset Pemacuan Stok Ikan, Jatiluhur. Parameter yang dianalisis adalah oksigen terlarut, bahan organik total, dan K2 (koefisien peluruhan), sedangkan parameter penunjang adalah suhu dan H2S. Hasil penelitian ini menunjukkan bahwa peningkatan bahan organik menyebabkan deplesi oksigen semakin tajam pada musim hujan di wilayah lakustrin. Konsentrasi bahan organik yang aman adalah 7,76 mg per l. Mass mortality of fishes at Ir. H. Djuanda Reservoir occurs almost every year. Oxygen depletion is one factor that affect the condition. There fore, this research should be done. The carrying capacity at Ir. H. Djuanda Reservoir to receive organic loading were determined in this study. The research conducted at Ir. H. Djuanda Reservoir from June 2003 until May 2004. Horizontal sampling station was conducted based on longitudinal gradient i.e. lacustrine zone (L1, L2, and L3), and transition zone (T1, T2, and T3). Vertical sampling points were at surface, at the depth of 7 m, 15, 25, 35, and 45 m, and at the bottom. Sample analysis carried out in physical chemical laboratory of Aquatic Resources Management Department, Faculty of Fisheries and Marine Science, IPB and chemical laboratory Loka Jatiluhur. The methods of this research were post facto survey descriptive. Dissolved oxygen, total organic matter, and BOD were observed during research.temperature and H2S were observed to support the study. The results showed that the increasing of organic matter cause the steep of oxygen depletion in transition of wet season at lacustrine zone. Acceptable concentration of total organic matter was 7.76 mg per l.