Articles

Preferences of Giant Gouramy (Osphronemus gouramy, Lac, 1801.), Walking Catfish (Clarias sp.) and Red Nile (Oreochromis sp.) on Natural Feed in Fish Culture Nafila, Dea; Rustadi, Rustadi; Djumanto, Djumanto
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (671.262 KB) | DOI: 10.22146/jfs.34494

Abstract

The aim of this study was to determine the preference for plankton as natural feed by giant gourami, walking catfish, and red nile on intensive aquaculture system. The study was designed using Completely Randomized Design (RAL), with two replications. Each fish was kept in six concrete tanks with dimension 2x2x1 m³ and 60 cm water level. Water source were from wells. Commercial pellet feed was given in three times daily ad libitum. Water samples were filtered and two individual fish were collected for plankton samples from pond water and alimentary canal, respectively, every two week, simultaneously with water quality measurements. Plankton samples were preserved using 5% formaldehyde and was observed under a compound light microscope with 100x magnification. The amount of plankton in the alimentary canal was converted to volume. Data were analyzed descriptively. The result showed that the volume contents proportion of plankton in the alimentary canal was less than 1%. The volume of plankton proportion in the alimentary canal of red nile were found the most than other fish. Each fish had the same preference of plankton of Lepocinclis and Scenedesmus, but different from other species of plankton. The plankton that utilized by giant gouramy were Crucigenia, Diadesmis and Navicula, whereas walking catfish was Pediastrum, and red nile was Microcystis. The plankton that preferred by giant gouramy were Crucigenia, Oscillatoria, Splirullina, and Synedra, walking catfish was Navicula, while red nile were Chrysamoeba and Tintinnidium.
ORAL ADMINISTRATION OF ALGINATE OLIGOSACCHARIDE FROM PADINA SP. ENHANCES TOLERANCE OF OXYGEN EXPOSURE STRESS IN ZEBRAFISH (DANIO RERIO) Yudiati, Ervia; Rustadi, Rustadi; Ginzel, Fanny Iriany; Hidayati, Jelita Rahma; Rizfa, Mila Safitri; Azhar, Nuril; Djarod, Muhammad Salauddin Ramadhan; Heriyati, Eny; Alghazeer, Rabia
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 1 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.25.1.7-14

Abstract

Alginate is rich in bioactive compounds and has been known to act as a stimulator on the innate immune system. The objective of this study is to determine polysaccharide and oligosaccharide alginate yield, that percentage inhibition with a different type of extraction, to evaluate growth performance as well as immune response by oxygen stress tolerance. Thermal heating with oven laboratory at 140oC for 4.5 hr was done to breakdown the polysaccharide into oligosaccharide. The extraction was conducted by maceration, filtration, precipitation, and centrifugation. Factorial design with two factors was implemented to 260 Zebrafish and reared in thirteen aquariums (20 fish per aquarium) for 12 days. Zebrafish was fed at different dose (4.0g; 6.0g; 8.0g.kg-1) and different type of extraction [noEDTA/noKCl; KCl; EDTA and (EDTAandKCl)]. The evaluation of radical scavenging activity was done spectrophotometrically at 515 nm. Results showed that the highest alginate yield either polysaccharide or oligosaccharide was gained from KCL treatments, percentage inhibition (82.61%), growth performance as well as tolerance of stress (P<0.05). The best growth performance was reached in oligosaccharide supplementation at 6.0g.kg-1 treatment. It can be concluded that alginate oliogosaccharide produced by thermal heating enhanced the antioxidant activity, boost the fish?s immune system, proofed by better growth performance and more tolerant to the low oxygen stress.
EUTROFIKASI NITROGEN DAN FOSFOR SERTA PENGENDALIANNYA DENGAN PERIKANAN DI WADUK SERMO Rustadi, Rustadi
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 16, No 3 (2009)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1.84 KB)

Abstract

Penelitian mengenai konsentrasi nitrogen (N) dan fosfor (P) dilakukan dengan tujuan untuk mengevaluasi tingkat eutrofikasi dan pencemaran air, menghitung neraca N total dan P total serta melakukan pengendaliannya menggunakan perikanan. Penelitian dilakukan menggunakan metode survai, yaitu melakukan pengambilan sampel dan pengamatan air secara purposive. Pengambilan sampel air di daerah waduk (hulu, tengah dan hilir waduk) dan daerah sungai (sungai masuk dan sungai keluar). Di daerah waduk diamati pada jeluk air: 0 m, 2 m, 4 m dan dasar. Pengambilan sampel air dilakukan tiap bulan, mulai Juni 2006 sampai Mei 2007. Vanabel penelitian meliputi: amonia, amonium, nitrit, nitrat dan fosfat; N total dan P total, suhu air, kekeruhan, TDS, TSS, O, terlarut, pH, CO, bebas, alkalinitas dan plankton. Eutrofikasi air oleh N dan P dianalisis secara diskriptif dan tingkat pencemaran air dihitung menggunakan Indeks Pencemaran (lP) yang disyaratkan PP RI Nomor 82. Neraca N total dan P total dihitung dengan input-output, sedangkan pengendaliannya menggunakan metode simulasi. Hasil penelitian menunjukkan bahwa eutrofikasi pada tingkat eutrofik sampai hipereutrofik, pencemaran air masih tergolong ringan di daerah budidaya ikan dan waktu konsentrasi P maksimum; budidaya ikan menggunakan KJA jaring ganda, penebaran dan pemanenan ikan di luar KJA dapat mengurangi residu dan beban N total dan P total.
ANALISIS KANDUNGAN NITROGEN, FOSFOR DAN KARBON ORGANIK DI DANAU SENTANI - PAPUA Indrayani, Ervina; Nitimulyo, Kamiso Handoyo; Hadisusanto, Suwarno; Rustadi, Rustadi
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 22, No 2 (2015)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Kajian mengenai analisis kandungan nitrogen (N), fosfor (P) dan karbon organik (KO) telah dilakukan di Danau Sentani, Papua. Penelitian ini bertujuan untuk mempelajari kandungan ketiga unsur tersebut di perairan. Metode penelitian yang digunakan adalah metode survei berstrata (stratified sampling method) sesuai dengan tujuan (purposive). Metode pengukuran dan pengambilan sampel menggunakan teknik Composit Sampling. Area penelitian dibagi atas 4 zona yaitu inlet, KJA, tengah danau dan outlet. Analisis data menggunakan Program Microsoft Excel 2007 dan Analisis Varians (ANOVA) pada taraf kepercayaan 90%. Hasil penelitian menunjukkan bahwa rasio N:P perairan danau adalah 10,248 mg/L/bln di inlet; 2,417 mg/L/bln di KJA; 0,683 mg/L/bln di tengah danau dan 8,351 mg/L/bln di outlet. Sementara itu, rasio C:N adalah 15,008 mg/L/bln di inlet; 47,647 mg/L/bln di KJA; 90,884 mg/L/bln di tengah danau dan 6,777 mg/L/bln di outlet. 
Kajian Fisik Pesisir Kulon Progo untuk Penentuan Zona Kawasan Mangrove dan Tambak Udang Tanjung, Riski; Khakhim, Nurul; Rustadi, Rustadi
Majalah Geografi Indonesia Vol 31, No 2 (2017): September 2017
Publisher : Fakultas Geografi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1349.055 KB) | DOI: 10.22146/mgi.26320

Abstract

AbstrakPesisir Kulon Progo saat ini memiliki habitat mangrove dan lahan tambak udang. Perkembangan salah satunya, akan mengakibatkan berkurangnya luas lahan yang lain. Penelitian ini bertujuan untuk (1) menganalisis kondisi fisik wilayah pesisir Kulon Progo, (2) menentukan zona yang sesuai untuk kawasan mangrove dan/atau tambak udang di wilayah pesisir Kulon Progo, dan (3) menyusun rekomendasi pengelolaan kawasan mangrove dan atau tambak udang di wilayah pesisir Kulon Progo. Pengambilan sampel dilakukan dengan purposive sampling. Data kondisi fisik lahan diperoleh melalui observasi dan pengukuran di lapangan. Zonasi kawasan mangrove dan tambak udang dilakukan dengan reinterpretasi peta dan metode matching dengan parameter kesesuaian yang telah ditentukan sebelumnya. Strategi pengelolaan kawasan mangrove dan tambak udang dilakukan dengan menganalisis faktor internal dan eksternal wilayah menggunakan analisis SWOT. Hasil penelitian menunjukkan bahwa kondisi fisik wilayah pesisir Kulon Progo terdiri atas substrat dasar berbatu, lempung bergeluh, lempung, lempung berpasir, berpasir. Pasang surut air laut berkisar 1-1,1m, salinitas air antara 0-29‰, kecerahan air antara 0 cm - tidak terukur, dan suhu air  antara 27-34,1 °C. Kondisi fisik pesisir Kulon Progo ada yang sesuai (S2) untuk pertumbuhan mangrove dan tambak udang, serta ada yang tidak sesuai untuk keduanya. Zona yang sesuai (S2) untuk kawasan mangrove terdapat di muara Sungai Bogowonto seluas 1,58ha. Zona yang sesuai (S2) untuk kawasan tambak udang seluas 134,49ha. Strategi pengelolaan kawasan untuk zonasi mangrove di lokasi kajian yang dapat direkomendasikan dalam penelitian ini antara lain (1) pelestarian dan pengembangan kawasan mangrove dalam bentuk kawasan konservasi sekaligus sebagai objek wisata dan pendidikan, (2) mengembangkan dan meningkatkan komitmen masyarakat atas arti penting kawasan mangrove untuk menghambat alih fungsi kawasan mangrove, (3) mengembangkan zona mangrove dengan menanam jenis mangrove yang sesuai dengan kondisi fisik lahan, (4) melakukan tindakan persuasif dalam mewujudkan konsensus masyarakat untuk membentuk kawasan lindung mangrovAbstractThe Coast of Kulon Progo is currently the habitats for mangroves and shrimp ponds, i.e., where the development of the former reduces the latter. This research aimed to (1) analyze the physical condition of the coast, (2) determine the suitable zone for mangrove areas and/or shrimp ponds along the coast, and (3) propose a recommendation for mangrove and/or shrimp pond management along the coast. The samples were selected using purposive sampling technique. The research also employed field observation and measurement to acquire the physical condition of the land. The zonation of mangrove area and shrimp pond was obtained from map reinterpretation and matching technique with the predefined parameters of land suitability. As for the mangrove and shrimp pond management strategies, the research used SWOT analysis to study both of the internal and external factors in the study area. The results showed that the substrate of the coast was composed of rock, clay loam, clay, sandy clay, and sand. Aside from the substrate, the physical condition of the coast was characterized by sea tide (1-1.1 m), salinity (0-29%), water transparency (0 cm-undetectable), and temperature (27-34.1°C). These characteristics classified the coast into two types of suitability for mangrove growth and shrimp pond development, namely suitable (S2) and unsuitable. While the suitable (S2) zone for mangrove development occupied 1.58 ha area in the mouth of Bogowonto River, the suitable (S2) zone for shrimp pond was considerably larger, i.e., 134.49 ha. The recommended strategies for mangrove zone management in the study area are as follows: (1) mangrove preservation and development as a conservation area and an object for tourist destination and education, (2) the encouragement and improvement of community’s commitment to accentuating the essential functions of mangrove areas and to decelerating any land use conversions of mangrove zone, (3) the development of mangrove zone by planting suitable mangrove species with the physical condition of the area,  and (4) the implementation of persuasive actions in actualizing community consensus on mangrove area development.
PENGARUH SUHU AIR TERHADAP DAYA TETAS TELUR DAN PERKEMBANGAN LARVA NILA MERAH (Oreochromis sp.) Rustadi, Rustadi
Jurnal Perikanan Universitas Gadjah Mada Vol 4, No 2 (2002)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.8908

Abstract

Artificial incubations of red tilapia eggs and fry were conducted in the effort to increase fish seed production and its quality. These experiments were done to determine suitable water temperature for egg incubation and larvae rearing. Four different water temperature­s, 24, 27, 30, and 33oC with variance 1oC and ambient temperature were tested in triplicates. One liter of plastic incubators made from soft drink bottles were set to water re-circulation system and provided with filter means.The fertilized eggs were stocked at 150 eggs. The hatching rate of egg increased as the increase of water temperature. The increase of water temperature decreased the incubation time of eggs, but increased hatching rate and the growth of larvae. The optimum water temperature was 29,87oC. 
KELIMPAHAN PLANKTON DAN PEMANFAATANNYA OLEH NILA MERAH (Oreochromis sp.) DALAM HAPA PEMBENIHAN DAN PENDEDERAN DI WADUK SERMO Rustadi, Rustadi
Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 1 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.8923

Abstract

Plankton monitoring were conducted in hatchery and rearing hapas of red tilapia (Oreochromis sp.) to know plankton abundance and its utilization by fish during 98 days. Be-weekly plankton samples and fry fish guts were taken from fish hapa rearing, meanwhile brood fish gut were taken monthly. Be-weekly plankton and water monitoring were also applied in fish rearing without feed, water outside of hapas and river. Two units of bamboo frame, 6 x 6 m2 divided into 4 blocks respectively, were used for fixing 2 x 3 x 1 m3 hatchery hapa, and 1 x 2 x 1 m3 rearing hapa. Commercial feed was given daily to brood stock at the rate of 2% of the total fish weight and fry at the rate of 40%. Plankton density and composition in hatchery and rearing hapas were higher density than water reservoir and river. All size of red tilapia consumed selected plankton species, about 31.34-38.89% of existing species. Dominant plankton in hapa water were: Navicula, Closteriopsis, Sphaerocystis, Surirella dan Arthrodesmus and among them were prefered by red tilapia as natural food, namely Navicula, Surirella, Closteriopsis dan Sphaerocystis. Water quality parameters were still suitable for fish growth and breeding, but dissolved oxygen tended to low due to high plankton abundance.
Pengaruh Ketebalan Media Budidaya Cacing Sutra (Tubifex sp.) Menggunakan Lumpur Limbah Budidaya Lele Suryadin, Dindin; Helmiati, Senny; Rustadi, Rustadi
Jurnal Perikanan Universitas Gadjah Mada Vol 19, No 2 (2017)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.26015

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh limbah budidaya lele sebagai media budidaya cacing sutera dan mendapatkan ketebalan media yang menghasilkan biomassa cacing sutera tertinggi. Penelitian dilakukan menggunakan sistem wadah bertingkat dengan aliran air secara resirkulasi. Wadah budidaya yang digunakan berukuran 40x30x20 cm3. Penelitian dilakukan secara eksperimen dengan rancangan penelitian berupa Rancangan Acak Kelompok Lengkap dengan empat perlakuan dan masing-masing tiga ulangan, yaitu P1 (ketebalan media 2 cm); P2 (ketebalan media 4 cm); P3 (ketebalan media 8 cm); P4 (ketebalan media 12 cm) dengan kedalaman air 6 cm. Padat tebar Tubifex sp. sebesar 150 g/m3 dengan rerata berat 0,0062±0,00032 g. Data dianalisis menggunakan sidik ragam dan uji lanjut Duncan’s Multiple Range Test. Perbedaan ketebalan media budidaya berpengaruh nyata (P<0,05) terhadap produksi biomassa cacing sutera. Biomassa cacing sutera tertinggi sebesar 1745,14±143,77g/m3 atau meningkat sebesar 12,65 kali lipat dan populasi sebesar 233848,46±19265,61 ind./m3 pada ketebalan media 8 cm. Hubungan perlakuan dengan produksi biomassa cacing sutera diperoleh hubungan kuadratik mengikuti persamaan y= -31,428x2 + 586,47x – 743,54. Ketebalan media yang optimal untuk menghasilkan produksi biomassa maksimal yaitu 9,1 cm.
PERKEMBANGAN EMBRIO DAN LARVA GURAMI (Osphronemus goramy Lac.) BASTAR, BLUESAFIR, DAN BULE Sari, Dini W.K.; Hardaningsih, Ign.; Rustadi, Rustadi
Jurnal Perikanan Universitas Gadjah Mada Vol 6, No 2 (2004)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.9045

Abstract

The objectives of this research were to know the diameter and hatching rate of eggs, development rate of embryos, and survival rate of larvae of three subspecies of giant gouramy. Design experiment used in this study was completely randomized design (CRD). Eggs were incubated at 290C and larvae were reared at the same temperature until post larvae stage (most of the yolk sac completely absorbed).The results showed that there was no significant difference among subspecies (a=5%). The average diameter of the eggs were 2.61, 2.47, and 2.39 mm for bule, bastar, and bluesafir, respectively. The highest hatching rate was reached by eggs of bluesafir, followed by bastar and bule. In addition, survival rates of larvae were 93.80%, 91.60%, and 84.20% for bule, bastar, and bluesafir, respectively. The highest specific length growth rate reached by bluesafir (7.4% per day) followed by bastar (6.80% per day) and bule (5.72% per day). The highest specific weight growth rate was reached by bule (6.85% per day) followed by bluesafir (6.65% per day) and bastar (5.37% per day).
PENAMPUNGAN LIMBAH DAN PENGARUHNYA TERHADAP LAJU SINTASAN DAN PERTUMBUHAN NILA MERAH DALAM KERAMBA JARING APUNG DI WADUK SERMO, YOGYAKARTA Rustadi, Rustadi
Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 1 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.8925

Abstract

The aim of this research was to find out the effect of waste collection in red tilapia culture using floating net cage to the quantity of the waste and degradation rate, on survival and growth rate of fish. A completely randomized design was performed in the experiment consist of two waste collections; namely: with and without collection, and three fish stocking weights of 2.5 kg, 5 kg and 7.5 kg fish/cage, with two replicates each. Floating net cages with the size of wide, length and height of 1 x 1 x 1.2 m were used in the experiment. To collect fish waste, inverted cone-shape plastic collector was attached to the cage and hanged 15 cm below the cage. Fingerling size ranged from 50 – 70 gram/fish were divided into two groups and stocked in the different replication. The fish were cultured for 84 days and fed daily with commercial feed (25-27% protein content) at the rate of 3% fish body weight. Waste sample were collected and incubated in different temperature of 20, 25 and 30 oC with deviation of 1 oC and 3 replicate each. Parameter of total dissolved solid (TDS), total suspended solid (TSS), DO, BOD, CO2 and NH3 were checked every 5 days for 20 days, and total N and total P were check at the beginning and the end. Data were analyzed statistically using confidence level of 95%. Total waste collected were ranged 0.109-0.117 kg dry weight/cage and waste lossing due to fixing collector 15 cm under the cage was about 14.44%. The addition of waste collection in fish culture tended to make lower survival and growth rate, meanwhile more stocking weight may increase fish harvest. Fish waste decomposed faster in higher temperature, indicate that the waste decomposition could decrease water quality and increase concentration of N and P nutrients.