Claim Missing Document
Check
Articles

Found 31 Documents
Search

Feasibility Study on the Profitability of Vannamei Shrimp Aquaculture on Coastal Area of Keburuhan Village, Purworejo Regency Djumanto, Djumanto; Ustadi, Ustadi; Rustadi, Rustadi; Triyatmo, Bambang
Aquacultura Indonesiana Vol 17, No 1 (2016)
Publisher : Indonesian Aquaculture Society (MAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.203 KB) | DOI: 10.21534/ai.v17i1.49

Abstract

Brackish water vannamei shrimp aquaculture in Keburuhan village of Purworejo Regency is one of the shrimp aquaculture activities developed since 2010. Shrimp aquaculture enteprises were done by local communities which use sandy land coated by plastic sheet with an area of 1000-4500 m2. Some farmers suffered losses due to lack of technical knowledge in shrimp aquaculture, environmental carrying capacity, ecological and economic feasibility. The aim of this study was to determine the general condition of vannamei shrimp aquaculture and shrimp farming feasibility. The study was conducted by field surveys, interviews and questionnaires to 30 farmers. The survey was conducted in May-June 2016 by purposive sampling of farmers who were members of a joint venture group of Minamulyo. The results showed shrimp pond size aquaculture area was varied, with a range of 1000-1500 m2, 1500-2000 m2, 2000-3000 m2 and 3000-4500 m2. An average fixed cost required for construction and operation of shrimp pond aquaculture was approximately IDR 6,620,934 to 12,606,666 million/plot/cycle shrimp production, while the variable costs of each cycle production ranged from IDR 45,876,733 to 78,861,666. The revenue and net profit varied according to pond size. The net gain for the smallest pond (1000-1500 m2) was IDR 48,702,332/plot/cycle, and the largest pond (3000-4500 m2) was IDR 58,131,666/plot/cycle. The shrimp farmers could recover the original investment incurred within a period of 4-6 months (one half cycles). Vannamei shrimp aquaculture in Keburuhan village of Purworejo regency brings a variety positive and negative impacts to the development of the economic, social and environment. Positive impact included increase of income and welfare of farmers, while the negative impact was a decline in the quality of the pond environment.
Water Quality and Productivity of Dryland Catfish Pond Based on Existing Technology and Land Priority in Gunungkidul Septriani, Nur Indah; Rustadi, Rustadi
Aquacultura Indonesiana Vol 16, No 2 (2015): Volume 16 Issue 2 Year 2015
Publisher : Indonesian Aquaculture Society (MAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.711 KB) | DOI: 10.21534/ai.v16i2.8

Abstract

This research is aimed to examine the water quality and productivity of dryland catfish pond based on the existing technology and land priority in Gunungkidul and to determine the suitable technology based on the land priority. Samples from the ponds employing intensive, extensive, and semi-intensive technology were analysed to find out the water quality such as the ammonia, nitrate, and nitrite contents; pH; DO; temperature and turbidity; land productivity; and profit. Existing analysis used scoring of sample ponds which included water quality, productivity and profit analysis. The highest score of the sample ponds becomes the sample of technology applied in the certain area. The highest score in high priority land was PTI (79%), medium priority land was PSS (72%), and non-priority land was NPE (68%). The water quality, productivity and profit in high priority land reached optimal result when it used intensive technology. The water quality, productivity and profit in medium priority land reached optimal result when it used semi-intensive technology. The water quality, productivity and profit in non-priority land reached optimal result when it used extensive technology.Keywords: Water quality; productivity; scoring; dryland catfish pond; existing technology; land priority
Utilization of Wastewater from Vannamei Shrimp Pond for Rearing Milkfish in Keburuhan Coast Purworejo Sub-District Djumanto, Djumanto; Ustadi, Ustadi; Rustadi, Rustadi; Triyatmo, Bambang
Aquacultura Indonesiana Vol 19, No 1 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (597.185 KB) | DOI: 10.21534/ai.v19i1.48

Abstract

Brackish water vannamei shrimp in the village of Keburuhan, Ngombol District of Purworejo Regency is one of the shrimp aquaculture activities developed since 2010. Shrimp farming enteprises is done by local communities which use the sandy soil coated plastic sheet with an area of 1000-4500 m2. There is a positive impact by increasing the income and welfare of farmers, but give negative effects in decline of surrounding pond environment. The shrimp farmers mostly disposed of wastewater directly into the sewers or the surrounding area. The wastewater of vannamei shrimp culture contains of uneaten feed and plankton that can be utilized to grow milkfish. The aim of this study was to determine the growth and feeding preferences for milkfish culture in wastewater reservoir of vannamei culture. The study was conducted from January to April 2017 by rearing of milkfish in earthen ponds of shrimp culture in wastewater reservoir. Wastes consist of feces and uneaten feed during shrimp rearing were siphoned and flowed into ponds wastewater reservoir. Milkfish juvenile with body length ranges from 9.3 to 9.7 cm and weight ranges from 3.4 to 6.9 g was introduced into three earthen ponds of 600 m2 each, with density of 6 individual/m2 in triplicate for 70 days. During the study, milkfish juvenile were not fed, but obtained wastewater from shrimp culture ponds. The wastewater from the shrimp ponds was siphoned and piped into a waste reservoir ponds every 3 days until shrimp harvesting. Fish samples of each pond as much as 40 individuals were taken biweekly and then measured the length and weight. Fish stomach was dissected and then digestive tract was taken to observe the species of plankton consumed. The results showed that milkfish could grow well in wastewater reservoir of shrimp culture. The average daily growth rate of length and weight of milkfish reached approximately 0.11 cm/day and 0.34 g/day, respectively. The length weight relationship of milkfish showed allometric growth pattern. The food type found in the intestinal was dominated by phytoplankton. Feed was dominated by genera of phytoplankton, which reach more than 99%. The most dominant of phytoplankton were Scenedesmus sp. (34.7%), then Crucigenia sp. (20.1%), followed by Cyclotella sp. (14.6%), and Clamydomonas sp. (7.5%) next Microcystis sp. (6.7%), while the other genera less than 4.2%. Further research is needed to determine the optimum density of milkfish to utilize wastewater of shrimp culture.
DELINEASI CEKUNGAN AIR TANAH BANDAR LAMPUNG SEBAGAI LANDASAN KONSERVASI UNTUK MENJAGA KETERSEDIAAN SECARA BERKELANJUTAN Rustadi, Rustadi; Arief I. H, Arief I. H; Ahmad Z., Ahmad Z.; Haerudin, Nandi; Suharno, Suharno
Prosiding Seminar Teknologi Kebumian dan Kelautan Vol 2, No 1 (2020)
Publisher : Prosiding Seminar Teknologi Kebumian dan Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1055.301 KB)

Abstract

Pertambahan populasi di Bandar Lampung telah berdampak pada alih fungsi ruang terbuka hijau dan meningkatnya ekstraksi air tanah untuk kebutuhan air baku. Ketidak seimbangan antara supply dan demand, tepah menyebabkan permasalahan lingkungan terjadinya intrusi di pesisir dan rawan krisis airtanah di musim kemarau. Tata kelola dan kebijakan untuk menjaga kesinambungan air tanah di daerah penelitian, perlu pemahaman keberadaan cekungan. Delineasi cekungan air tanah dilakukan melalui survey gayaberat terbatas dan terdistribusisecara random. Anomali Bouguer rendah ditafsirkan sebagai zona cekungan air tanah berarah barat daya-timur laut diapit oleh tinggian batuan dasar di barat laut dan timur – timurdaya. Cekungan Bandar Lampung terbentuk oleh grabben batuan dasar, memiliki dimensi panjang 8 km dan ketebalan lapisan sedimen 200 m. Struktur berarah barattimur menjadi interkoneksi zona resapan Gunung Betung dan cekungan. Struktur membantu mengalirkan infiltrasi di zona resapan dan mengisi cekungan Bandar Lampung.
Kajian Fisik Pesisir Kulon Progo untuk Penentuan Zona Kawasan Mangrove dan Tambak Udang Riski Tanjung; Nurul Khakhim; Rustadi Rustadi
Majalah Geografi Indonesia Vol 31, No 2 (2017): Majalah Geografi Indonesia
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.
Oral Administration of Alginate Oligosaccharide from Padina sp. Enhances Tolerance of Oxygen Exposure Stress in Zebrafish (Danio rerio) Ervia Yudiati; Rustadi Rustadi; Fanny Iriany Ginzel; Jelita Rahma Hidayati; Mila Safitri Rizfa; Nuril Azhar; Muhammad Salauddin Ramadhan Djarod; Eny Heriyati; Rabia Alghazeer
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 | Full PDF (551.591 KB) | 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.
Peran Dinas Perikanan Dalam Pemberdayaan Masyarakat Nelayan Dan Implikasinya Terhadap Ketahanan Ekonomi Keluarga Nelayan (Studi Pada Kampung Nelayan Di Kecamatan Bula, Kabupaten Seram Bagian Timur, Provinsi Maluku) Zarita Kaulika Rumarey Wattimena; Rustadi Rustadi; Suadi Suadi
Jurnal Ketahanan Nasional Vol 28, No 1 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jkn.72773

Abstract

ABSTRACT This study aimed to analyzed the role of  Department of Fishery of Seram Bagian Timur Regency  using the Siagian theory in 2003, through 5 role indicators namely the role of stabilizer, innovator, modernizr, pioneer and implementer as well as the implications of the role of the service on the economic resilience of fishermen's families which included: place of residence (home ownership) , income, education costs and health insurance in Bula Fisherman's Village SBT Regency.This research was a qualitative descriptive study, with data collection techniques using qualitative methods with samples of 6 informants from the officers in the Fisheries Services and 5 fishers informants representing 3 fish farmer groups. The data collection techniques used were (1) observation (2) interviews, and (3) documentation with data analysis techniques through qualitative description analysis which drew conclusions analytically through the stages of data reduction, data presentation and conclusion drawing.The results of the study indicated that Department of Fishery of SBT Regency had not carried out its main duties and functions optimally. The limitations of its implementation, both the role and implementation of policies, were still hampered by a number of factors, namely budget constraints, low quality of human resources, government policies and inadequate facilities and infrastructure. So, that the local governments had not been effective in managing and utilizing fishery resources. The implication of the role of Office of Fishery of SBT in empowering fishermen showed that it still had not had a positive influence on the economic condition of the fishermen's families, most of the fishing families had family economic resilience that was included in the less resilient category, namely there were still many family of fisherman who lived in poverty. In order to supporedt the success of the role of the Department of Fisheries, a number of supporting factors were needed that could encourage the regional economy through marine and fisheries-based regional development, namely fishery resources, human resources and government policies (budget).
The use of otolith to determine age and spawning time of red devil Amphilophus labiatus [Gunther, 1864] in Sermo Reservoir, Yogyakarta Sitty Ainsyah Habibie; Djumanto Djumanto; Rustadi Rustadi
Jurnal Iktiologi Indonesia Vol 15 No 2 (2015): June 2015
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v15i2.63

Abstract

The purpose of this study was to determine the age and spawning time of red devil (Amphilophus labiatus) based on the observation of the daily increment of otolith in juvenile fish. The sampling was conducted from October 2013 to March 2014. The juveniles were collected biweekly using a hapa net and scoop net. To determine the first formation of daily increment, the brood stock of tilapia (Oreochromis sp.) was spawned in captivity. A total of five larvae was taken every day from hatching day until the 18 days old, and then the larvae were taken every two days. Sagittal otoliths were collected by putting the larva into a 5.25% NaOCl solution. The left otolith was attached to the object glass using Bucherer cement, and then dropped with Canada balsam and closed by cover glass. The numbers of daily increment were observed by using a microscope with a magnification 100-400 X. The age was determined based on the number of daily increment plus the first time of ring formation. Spawning time was determined by back calculation of the sampling time, plus age and incubation period. The result showed that there were 130 individual juveniles collected ranged from 7.0 to 14.6 mm total length (TL). The formation of daily increment on 69 sagittal otolits was observed. The first sagittal increment was formed on the third day after hatching and the forming of the increment was daily. The ages of juvenile red devil were between 9-28 days old and majority of the larvae in 17 days. Red devil spawned coincided with the new moon phase and high intensity of rainfalls. Abstrak Penelitian ini bertujuan untuk menentukan umur dan waktu pemijahan ikan red devil berdasarkan jumlah lingkaran ha-rian pada otolit juwana ikan. Penelitian dilakukan dari bulan Oktober 2013 hingga Maret 2014. Pengambilan contoh ikan dilakukan tiap dua mingguan dengan menggunakan waring dan seser. Guna menentukan awal pembentukan ling-karan harian pada otolit, maka dilakukan pengamatan terhadap otolit larva ikan nila albino (Oreochromis sp.) hasil te-tasan. Sebanyak lima ekor larva diambil tiap hari sejak menetas hingga umur 18 hari, selanjutnya larva diambil tiap dua hari. Otolit sagitta diambil dengan cara merendam ikan menggunakan larutan NaOCl 5,25%. Otolit yang tertinggal se-lanjutnya direkatkan pada objek gelas menggunakan semen bucherer, dan ditutup menggunakan kanada balsam serta kaca penutup. Pengamatan jumlah lingkaran harian menggunakan mikroskop dengan pembesaran 100-400 kali. Umur larva ikan ditentukan berdasarkan jumlah lingkaran pada otolit ditambah waktu terbentuknya lingkaran pertama kali se-jak penetasan. Waktu pemijahan larva ikan diduga dengan perhitungan balik dari waktu sampling ditambah umur dan masa pengeraman. Hasil penelitian menunjukkan sebanyak 130 juwana ikan red devil dengan kisaran panjang 7,0-14,6 mm berhasil dikumpulkan dan sebanyak 69 otolit berhasil diamati. Pembentukan lingkaran pada otolit nila albino dimu-lai pada hari ketujuh setelah pemijahan atau hari ketiga setelah penetasan dan terbentuk secara harian. Juwana ikan red devil berumur 9-28 hari, yang didominasi oleh larva berumur 17 hari. Ikan red devil memijah setiap bulan dari November hingga Februari, bertepatan dengan bulan fase gelap dan curah hujan tinggi.
PENURUNAN KERAGAMAN GENETIK PADA F-4 IKAN NILA MERAH “CANGKRINGAN” HASIL PEMULIAAN DIDETEKSI DENGAN MARKER GENETIK Estu Nugroho; Rustadi Rustadi; Dwijo Priyanto; Hery Sulistyo; Susila Susila; Sunaryo Sunaryo; Bagus Wasito
Jurnal Riset Akuakultur Vol 9, No 1 (2014): (April 2014)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (87.077 KB) | DOI: 10.15578/jra.9.1.2014.25-30

Abstract

Variasi genetik ikan nila merah “Cangkringan” hasil pemuliaan dimonitor denganmenggunakan marker d-Loop DNA untuk mengetahui pembawa keragaman genetik yang dihasilkan karena kegiatan seleksi. DNA diekstraksi dari sirip ikan nila generasi 1 (F-0) hingga generasi ke-5 (F-4) dan diamplifikasi daerah d-Loop pada mitokondria menggunakan primer LH 1509 dan FH 1202. Secara statistik tidak terdapat perbedaan genotipe yang nyata antara ke-5 generasi ikan nila yang diuji. Terdapat penurunan variasi genetik dan kehilangan haplotipe sebesar 25% dari generasi pertama ke generasi 5 akibat seleksi berdasarkan komposite haplotipe dengan empat enzim restriksi Mbo-I, Hae-III, Rsa-I, dan Alu-I.
PENGARUH KONSENTRASI KAPUR (CaCO3) TERHADAP PERTUMBUHAN LOBSTER AIR TAWAR (Cherax quadricarinatus) Arki Y. Arsono; Rustadi Rustadi; Bambang Triyatmo
Jurnal Perikanan Universitas Gadjah Mada Vol 12, No 1 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (264.456 KB) | DOI: 10.22146/jfs.2909

Abstract

This research was conducted to determine the effect of lime (CaCO3) concentration on the availability of calcium in water and growth of Crayfish (Cherax quadricarinatus). Completely random design was used in the experiment that consisted of 4 treatments and 3 replications. Four treatments of lime concentration were 0, 50, 100, and 150 mg CaCO3/l. The research was conducted in Fisheries Research Station, Agriculture Faculty, Gadjah Mada University for 30 days. Ten Crayfish were reared in 60 cm x 40 cm x 50 cm aquarium in 60 l water. Crayfish were fed ad libitum with Tubifex tubifex. Calcium concentration on water, Crayfish growth, and water quality were observed every tenth days. The data of calcium concentration on water and Crayfish growth were analyzed with regression and correlation analysis at 95% confi dence level, whereas water quality analyzed descriptively. The research showed that there was correlation between lime concentration and its availability in the water. It showed that, more lime concentration resulted on higher calcium availability in water. Crayfish growth was relative faster on higher lime concentration.