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Omni-Akuatika

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Published by Universitas Jenderal Soedirman

ISSN : 18583873 EISSN : 24769347 DOI : -

Core Subject : Science, Agriculture, Social,

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

OmniAquatika is a scholarly refereed research journal which aims to promote the theory and practice, innovation, engineering and management as well as social-economic relevant in fisheries and marine sciences fields. The main aspects of research areas include, but are not exclusive to the current research on cells, organisms, populations, ecosystems, or processes that affect aquatic systems in the field of fisheries and marine science. The journal also welcome other aquatic relevant aspect related to the transport, fate, control of nutrients and abatement of pollutants in the aquatic environment as well as the ecosystem rehabilitation. The authors and readers are students, scientists, and regulatory experts from the academic, industrial, and government sectors worldwide. Master thesis and part of dissertation research work might becoming the potential contributors. High-quality, research articles make up the primary content. Other contributions are short communications, reviews, and special issues. Before contributions are accepted for publication, they must pass a peer-review process managed by the editor-in-chief.

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Articles 286 Documents

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Mass Mortality of Fish in Lampung Bay, Indonesia Tumpak Sidabutar
Journal Omni-Akuatika Vol 12, No 1 (2016): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The surface waters in Lampung Bay appeared with dark reddish brown color from the beginning of October until November 2012 due to a bloom, an explosion in the phytoplankton population. This event resulted in the mass mortality of fishes that are cultured in floating nets there. Other smaller and less frequent blooms occurred in the bay the next year. This algal bloom was caused by the dinoflagellate species Cochlodinium polykrikoides. This was thought to be the first bloom of Coclodinium in these waters, or any in Indonesian waters. The highest abundance of Cochlodinium during the incident reached to 3.07 x 107 cells.l-1. Mass fish mortality in the floating nets was due to oxygen depletion, mainly during the night time. The clogging of their gills by dense phytoplankton cells was assumed to be the cause. The population explosion of Cochlodinium was triggered by a high ratio of nitrate and phosphate concentration in the waters. The nutrient ratios of N/P in the water were high, indicating nitrate as a triggering factor and phosphate as a limiting factor.Keywords: algal bloom, Cochlodinium, discoloration, fish mortalities, Lampung Bay

Penggunaan Keong Bakau Telescopium sp (Gastropoda: Potamididae) dan Siput Bakau Cerithidea sp (Gastropoda: Potamididae) Sebagai Biofilter terhadap Limbah Budidaya Ikan Bandeng (Chanos chanos) Munawar Khalil; Riri Ezraneti; Jannatiah Jannatiah; Siti Hajar
Journal Omni-Akuatika Vol 12, No 3 (2016): Omni-Akuatika Special Issue Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Mangrove snail Telescopium sp and Cerithidea sp are natural biofilter that able used to manage the changes in water quality caused by the culture sewage. This research aimed to analyze the utilization of Telescopium sp and Cerithidea sp as natural biofilter for re-improving water quality level from culture sewage in the laboratory scale. The outcome of this study was expected to be valuable information that mangrove gastropods not only as pests in mariculture ponds, but also able to use as natural biofilter in pond sewage management for recovering water quality level. This research was conducted from April to July 2016 in Hatchery and Aquaculture Technology Laboratory, Aquaculture Department, Agriculture Faculty, Malikussaleh University. Descriptive and quantitative methods used in this research including two treatment and three replications. Water quality such as turbidity, temperature, ammonia, nitrate, nitrite, orthophosphate, pH and dissolved oxygen measured periodically as research parameters. The result showed that the utilization of mangrove gastropod Telescopium sp and Cerithidea sp as natural biofilter was able to re-improving the water quality value such as pH, ammonia, nitrat, nitrit, orthophosphate and turbidity to the normal level. Meanwhile, the utilization of mangrove gastropods as natural biofilter does not gave any significant changes in the value of temperature, salinity and dissolved oxygen. Cerithidea sp also has better performance to reduce the water nutrient level in culture sewage compared than Telescopium sp. Keyword: mangrove gastropod, biofiltration, water quality, culture sewage

ASSESSMENT OF CADMIUM (Cd) CONTAMINATION IN MUD CRAB (Scylla spp.) AND SEDIMENT FROM SEGARA ANAKAN LAGOON, CILACAP, INDONESIA Feri Susanto; Nuning Vita Hidayati; Agung Dhamar Syakti
Journal Omni-Akuatika Vol 10, No 2 (2014): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The study aimes to examine the accumulation level of selected heavy metal Cd in various of common mud crab (Scylla spp.) samples from Segara Anakan Lagoon-Cilacap. Mangrove crab and sediment samples were taken from Segara Anakan (108046’–109005’E; 7034’–7048’S) and were analyzed using Atomic Absorption Spectrophotometer (AAS). The Cd extent in Scylla spp. varied from 0.084 - 0.273 ppm which still below the European Commission (2006) threshold value (0.5 ppm). On the other hand Cd concentration in sediment for most stations value (0.625 - 1.635 ppm) have exceeded the Interim marine sediment quality guidelines (ISQGs value; 0.7 ppm) except for station 2 and 4. Concerning the sediment, to interpret and assess the contamination status four indices were used, namely Contamination Factor (CF), Enrichment Factor (EF), Pollution Load Index (PLI), and Geoaccumulation Index (Igeo). The results show the Segara Anakan sediment value for CF varied 3.125 - 8.175, EF was 50.481, PLI was 5.381 and Igeo varied 0.319 - 0.736. The finding result shows the Segara Anakan sediment could be considered as moderately polluted.Keywords: cadmium, contamination, scylla, sediment.

The Sea Urchin (Echinoidea) from Panjang Island Water, Bangka Belitung Province Siti Aisyah Lubis; Rofiza Yolanda; Arief Anthonius Purnama; Ria Karno
Journal Omni-Akuatika Vol 12, No 2 (2016): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

This study has been conducted from May to July 2016 in Panjang island, Bangka Tengah District,Bangka Belitung Province. The aims of this study was to evaluate the species of sea urchins by usingsurvey method at four sites. Sampling was done by using a square transect of 50 x 50 m. A total of868 individuals of sea urchin belonging to 2 species were recorded in this study, namely Diademasetosum and Echinothrix calamaris. D. setosum was the most abundant in individual number (828individuals) meanwhile E. calamaris only 40 individuals.Keywords: Diadema setosum, Echi nothrix calamaris, reef flat

Specific Immune Response Kinetics and Mortality Patterns of Tilapia Oreochromis niloticus on Post-Cocktail Vaccination Period against the Infection of Aeromonas hydrophila and Streptococcus agalactiae Sukenda Sukenda; Tuti Sumiati; Sri Nuryati; Angela Mariana Lusiastuti; Dendi Hidayatullah
Journal Omni-Akuatika Vol 13, No 2 (2017): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Fish vaccination aims to induce a specific immune response indicated by an increase of antibodies in vaccinated fish. However, in accordance with time the presence of will continue to decline. The purpose of this study was to determine the kinetics of specifik immune response and trend mortality against Aeromonas hydrophila and Streptococcus agalactiae on tilapia following vaccination with cocktail vaccine. Fish vaccinated through immersion for 30 minutes in a solution of diluted vaccine. Challenge test was performed for three periods, on day 22, 50, and 78 post-vaccination, fish were challenged with single infection of A. hydrophila 108 cfu. mL-1 and S. agalactiae 104 cfu. mL-1 and co-infection of both bacteria by intraperitoneal. During rearing, the blood fish were taken for determining of serum antibodies, and its measured by ELISA. The results showed that the concentration of specific antibodies vaccinated fish were significantly higher than the control. The basal antibody levels of A. hydrophila before vaccination were higher than S. agalactiae with OD of 0.104 and 0.069 respectively. The maximum antibody response was reached within 70 days of the A. hydrophila OD= 0.264 and 56 days against S. agalactiae OD= 0.188. The mortality rate in the control group was significantly higher than vaccinated on all types and each challenge test period. The trend of mortality due to a single infection of A. hydrophila and co-infections occur more quickly than by S. agalactiae. Lowest mortality occurred in the vaccinated group at 50 day tested challenge.Keywords: kinetics antibody, Aeromnas hydrophila, Streptococcus agalactiae, Oreochromis niloticus

Bathymetry and Hydrodynamics in Pare Bay Waters During Transitional Seasons (SeptemberOctober) Ulung Jantama Wisha; Aida Heriati
Journal Omni-Akuatika Vol 12, No 2 (2016): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Sedimentation on Pare bay and Karajae estuary originated from the run off of Karajae River. Highsedimentation process leads to the adverse effect of abiotic environmental changes. The aim of thisresearch is to analyse bathymetry condition and hydrodynamic characteristics of the area inunderstanding sediment distribution on Pare Bay. Corrected bathymetric data by tide data isprocessed using Surfer software 9.0 versions to analyse Pare Bay contour in 2D and 3D, the resultshow depth ranges from 0 to 20 meters. Flow model module by MIKE 21 software was used inhydrodynamic simulation (MRSE 11.44%) and shows that current condition in Pare Bay wasdominated by tidal (within its speed up to 0.43 ms-1), surface currents speed is higher and morerandom than the speed in water column and near bottom. Due to its location, Pare Bay is directlyinfluenced by Indonesian Through flow which has strong currents flow and cause mixing andturbulence along its way, this condition influences Pare Bay condition, especially in the process ofsedimentation and turbulence. Keywords: bathymetry, currents, hydrodynamics, sedimentation, pare bay

Analisis Perubahan Lahan Kawasan Laguna Segara Anakan Selama Periode Waktu (1978 – 2016) Menggunakan Satelit Landsat Multitemporal Rose Dewi; Muhammad Zainuri; Sutrisno Anggoro; Tjahjo Winanto
Journal Omni-Akuatika Vol 12, No 3 (2016): Omni-Akuatika Special Issue Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Segara Anakan Lagoon (SAL) has the unique characteristics of the region with the high of natural resources biodiversity. The region of SAL is influences by natural factor (estuarine freshwater stream of Citanduy watershed and the high of sedimentation rate) and the variety of anthropogenic factor. The factors lead to the changes in land, because it triggers the decrease of the lagoon water bodies. The aim of the research is to know the changes of the region land use in SAL and its impact. Temporally spatial approach is required to evauate the influence of both factors. Spatial approach is done by using remote sensing method with Geographic Information System, with Multi-Temporal Landsat imagery data processing (the year of 1978, 1994, 2001, 2009, 2011 and 2016). It uses land classification technique (Supervised Classification). It is processed with ER Mapper 7.0 software and displayed with Arc GIS (Jpeg). The analysis result shows that there is 2.703,7 ha extensive shrinkage lagoon in 38 year (1978 - 2016) or there is 71.15 ha per year in land area increase in the last 38 years. It is supported with 4.741,36 ha residential land and 17.962,64 ha field land that cause the degredation of SAL region. The increase of SAL citizenary amount triggers the land conversion for the interest of the various anthropogenic activities. It is supported by the threat of natural factors of high sedimentation level that cause higher SAL pressure. In conclusion, it is needed evaluation and management strategies to overcome the changes of SAL land area by the local government and related parties.

The Effect of Dietary Phytase Supplementation on Digestibility and Growth of Asian Seabass Lates calcarifer Totok Yudhiyanto; Suminto Suminto; Diana Rachmawati
Journal Omni-Akuatika Vol 13, No 2 (2017): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The purpose of this research is to evaluate Asian sea bass digestibility and growth fed with phytase dietary supplementation on soybean based fish diet. The initial weight of fish was 4.99±0.2 g with stocking density of 20 fishes per tanks reared in 80 L tank of sea water for 6 weeks. Completely Randomized Design of 50% soybean meal with phytase supplementation of 0; 500; 1,000; and 1,500 FTU kg-1 and three replication was used in this trial. Chromium oxide (Cr2O3) was used as digestibility indicator. Multivariate anova and One way anova (SPSS); linear regression (Microsoft Excel) and polynomial orthogonal (Microsoft Excel and Maple) was used to analyze the data. The results of Multivariate anova showed that phytase supplementation affect total digestibility (KCT) and relative growth rate (RGR) of asian seabass significantly (P<0.01) with phytase dose 1,000 FTU. One way anova also indicated that phytase 1,000 FTU significantly affect all parameters. Apparent digestibility coefficient (ADC) phosphorus had a very significant and dominant effect to total digestibility with R2 = 0.9669 than ADC protein and ADC fat (linear regression). KCT significantly affects efficiency of dietary protein (EPP) 30.57% and protein efficiency ratio (PER) 0.67%. EPP and PER significantly effect RGR 1.56% day-1, simultaneously. The optimal dose of phytase supplementation is 1,220 FTU.

Marine Bacteria from Eastern Indonesia Waters and Their Potential Use in Biotechnology Yosmina H Tapilatu
Journal Omni-Akuatika Vol 12, No 1 (2016): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Indonesian vast marine waters, which constitute 81% of the country’s total area, have a great potential in terms of marine bacteria biodiversity. However, marine bacteria are still under-explored in Indonesia, especially in its eastern area. Known as one of the biodiversity hotspots worldwide, this area surely harbors various marine bacteria of particular interest. Despite the growing number of oceanic expeditions carried out in this area, only little attention has been attributed to marine bacteria. Limited literatures exist on the isolation of marine bacteria producing compounds with potential biotechnological applications from the aforementioned waters. There are two main causes of this problem, namely lack of infrastructures and limited competent human resources. In this paper, I will highlight the preliminary results of isolation and bioprospecting attempts on this group of bacteria during the last fifteen years. These results indicate that research activities on marine bacteria in this area need to be intensified, to uncover their potential applications in various biotechnological fields.Keywords: marine bacteria, eastern Indonesian waters, biotechnological application

Kesehatan Karang di Perairan Kessilampe Kota Kendari Berdasarkan Skor Kesehatan Karang dan Densitas Zooxanthellae Palupi Diyah Ratna; Ira Ira; Rahmadani Rahmadani
Journal Omni-Akuatika Vol 12, No 3 (2016): Omni-Akuatika Special Issue Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Tujuan dari penelitian ini adalah mengetahui kesehatan karang berdasarkan tutupan persentase karang hidup, skor kesehatan karang, dan densitas zooxanthellae sebagai simbion karang. Metode penentuan titik stasiun dengan menggunakan purposif sample. Metode pengukuran kondisi terumbu karang menggunakan Line Intersept Transect (LIT) dengan 3 (tiga) kali ulangan tiap stasiun, skor kesehatan karang menggunakan metode quadrat transect (1x1m), dan densitas zooxanthellae dihitung dengan pengambilan sampel jaringan karang. Pengambilan data di perairan menggunakan alat bantu selam SCUBA. Hasil penelitian ini didapat kondisi terumbu karang di lokasi penelitian dalam keadaan rusak dengan rata-rata tutupan karang hidup sebesar 19%. Secara umum biota karang yang mampu bertahan hidup di lokasi penelitian dalam kondisi cukup sehat (skor 4). Hal ini didukung dengan rata-rata jumlah zooxanthellae yang tidak begitu banyak yaitu 1,4 juta sel/cm2 dengan kisaran yang lebar (250ribu-2,5juta sel/cm2). Keberadaan terumbu karang di pantai Mayaria beradaptasi dalam bentuk spot-spot dan didominasi oleh karang foliose dan masive.Kata Kunci : kesehatan karang, Pantai Kessilampe, zooxanthellae

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