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Omni-Akuatika
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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Search results for , issue "Vol 18, No 2 (2022): Omni-Akuatika November" : 10 Documents clear
Production, Fishing Season and Fishing Ground of the Dominant Fish (Euthynnus affinis, Mene maculata, Leiognathus equulus) Caught by Boat Seine in Palabuhanratu Indonesia Mohammad Imron; Mulyono S Baskoro; Didin Komarudin
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.922

Abstract

Boat Seine net is a very productive fishing gear in Nusantara Fisheries Port (NFP) Palabuhanratu. Boat Seine was a fishing unit that has the third largest contribution to the provision of fish stocks in 2019, which is 9% of the total production volume of NFP Palabuhanratu after lift net (40%) and longline (35%). The purpose of this study was to analyze the composition of the main catch, productivity, fishing season and to analyse the fishing ground in Palabuhanratu Bay. The type of data collected in this study was quantitative data. Primary data from interviews and field observations of fish landing activities at Palabuhanratu in October 2020 were used to compile this study's data, which included the type of fishing gear used, the composition of the types, and the production of the catch. Secondary data collected were monthly catches and trips made by Boat Seine fishing units. By analyzing the data of Boat Seine net fishing from 2015 to 2019, descriptive analysis method was used to investigate the composition of Boat Seine net catch. The results of the research showed that mackerel (Euthynnus affinis), moonfish (Mene maculata), and ponyfish (Leiognathus equulus) are the dominant fishes caught at the Palabuhanratu waters. The productivity level of Boat Seine net was 348 Kg/Trip in 2015, which increased to 603 Kg/Trip in 2019. The mackerel season occurs around May to September and November. Moonfish fishing season occurs in March, September and October. Ponyfish fishing season occurs in January, March, May, October, November, and December. Boat Seine net fishing grounds in the waters of Palabuhanratu Bay are relatively stationary around the waters of Palabuhanratu Bay.Keywords: CPUE, Fishing Area, Fishing Season Index, Productivity
Blood Health Indicators Changes Induced by Replacing Fish meal with Lentil seed meal in the Common Carp (Cyprinus carpio L.) Bakhan Rafiq Hassan; Nasreen Mohialddin Abdulrahman; Vian Muhamad Ahmad; Zaweta Sharif Abdulla
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.992

Abstract

According to the research, substituting a fish meal with a plant protein source in a fish diet presents several difficulties. As a result, the goal of this study was to evaluate the effects of substituting lentil seed meal meal for fish meal in the diet of Cyprinus carpio using a variety of blood health indices. Five different diets were created by replacing FM with 0 (control), 5, 10, 15, and 20% lentil seed meal meal. A total of 150 common carp with an initial weight of 103.8±0.5g are randomly distributed into 15 tanks for 70 days, at a rate of 3% live weight per day and two times each day. Blood samples were obtained from five fish in each tank at the end of the feeding trial to analyze hematological and biochemical parameters. Hematological and differential leukocyte counts showed no significant changes (p<0.05). Also, dietary treatments had no effect on serum glucose and total proteins (Albumin and Globulin). However, serum enzyme activity (alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP)), triglycerides, and total cholesterol were increased significantly (p<0.05) as the amount of lentil seed meal meal in the diet grew. According to the findings of this study, the maximum amounts of lentil seed meal replacement in Cyprinus carpio diets might be between 15 and 20% of total protein sources without causing adverse effects on hematological and certain plasma biochemical markers. ?Keywords: Biochemical, Common Carp, Hematology, Plant Protein
The Effect of Different Doses of Citronella Oil (Cymbopogon citratus) as Anesthetic for Prospective Tilapia Broodstock (Oreochromis niloticus) in Closed Transportation System Astarini Shabrina Aryanti; Dicky Harwanto; Tristiana Yuniarti
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.987

Abstract

Anesthesia of fish with citronella oil in a closed transportation system has never been tested on prospective tilapia broodstock. The broodstocks transportation activities are to ensure survival and keep the reproductive stages undisturbed and safe to the destination. This study aims to determine the effect and the best dose on anesthesia with citronella oil for prospective tilapia broodstock in closed transportation systems. The research was conducted on 27 April – 4 May 2021 at Fish Seed Hall Potrobangsan, Magelang. The test material used citronella oil with a fish density of 10 fish/6 liters per bag. The experimental design used was a completely randomized design with five treatments and three replications with doses of citronella oil, namely A (0 mL/L as control); B (0,05 mL/L), C (0,10 mL/L); D (0,15 mL/L); and E (0,20 mL/L). Fish were transported for 13 hours with artificial simulation. Parameters observed were fish behavior during anesthesia, time to faint and recover, survival, water quality, blood glucose, blood profile (erythrocytes, leukocytes and hemoglobin), Hepatosomatic Index and Gonadosomatic Index. Behavior during anesthesia showed that the operculum slowed down, response weakened and swimming balance was lost. Different dose of citronella oil had a significant effect on survival, blood glucose, erythrocytes, and leukocytes, but had no significant effect on hemoglobin, Hepatosomatic Index (HSI) and Gonadosomatic Index (GSI). The best dose of citronella oil was 0.10 mL/L with an average survival of 93.33%.Keywords: anesthesia, citronella, tilapia, broodstock, transportation
Antioxidant activities from different parts of Sargassum polycystum thalli through ultrasound-assisted extraction (UAE) method I Ketut Sumandiarsa; Nurul Hamida; Joko Santoso; Kustiariyah Tarman
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.907

Abstract

Sargassum polycystum is well known as macroalgae that contain active compounds with great function as antioxidants. The antioxidants content of the seaweed has links closely to phenolic compounds. The study is aimed to determine active compound quality from different thalli parts of S. polycystum extracted by Ultra-sound-assisted extraction (UAE). Fresh samples were prepared into three parts, which are apical, middle, and base thallus. Extraction was carried out by ultrasonication method and using 90% acetone as solvent. Levels of total phenols were analyzed using the Reagent Folin-Ciocalteu. Antioxidant activities were analyzed using DPPH, FRAP, and CUPRAC methods. The highest total phenolic content was found at the apical of the thallus, about 875.64 mg GAE/g. The most excellent DPPH antioxidant activities in S. polycystum were found from the apical part of the thallus with an IC 50 value of 38.49 ppm. The FRAP and CUPRAC antioxidant’s capacity showed the highest in the apical part of the thallus, which was 989.93 mol Fe (II)/g and 555.52 µmol Trolox/g, respectively. The extraction results of different parts of the thallus show highly potent active compounds of alkaloids, steroids, phenols, flavonoids, and potent antioxidants activity.Keywords: antioxidants, phytochemical, ultrasonication, S. polycystum 
Germ Cells and Gonadal Development in a Teleost, Osteochilus vittatus (Valenciennes, 1842) Exposed to Potassium Dichromate Sharon Hillary; Hernayanti Hernayanti; Gratiana Ekaningsih Wijayanti
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.999

Abstract

Potassium dichromate, K2Cr2O7, is a well-known heavy metal, commonly used as an oxidizing and tanning agent in industrial applications. Prolonged or repeated exposure of hexavalent chromium is deemed very toxic for aquatic biota, with long lasting effect. This substance induce damage to DNA and tissue structures, as well as disruption of survival and growth rate. The present research exposed Osteochilus vittatus in larval and juvenile stages, to varying concentration of K2Cr2O7. This experiment was aimed to evaluate the effect of chromium on primordial germ cells (PGCs) and subsequently, to the subject gonadal development. The evaluation was based on paraffin-embedded section, stained with Haematoxylin-Eosin. K2Cr2O7 of 2.5 and 5 ppm were applied to four crucial developmental stages; post-hatching larvae, 1-month, 2-months, and 3-months juvenile, for 30 days. There was a consistent pattern in all test subject, in which higher concentration of K2Cr2O7 resulted in lower PGCs number and delayed gonadal appearance. Our results suggested that sublethal Cr exposure to larval stage potentially decrease PGCs and thus, hinder the formation of gonad. Regulation of Cr-containing waste disposal should be issued in near future, to prevent further damage on local freshwater fish.Keywords: Chromium, Cyprinids, Juvenile, Larvae, PGC
The Condition of Acidity, Phosphate, And Nitrate in Indonesian Waters Faeza A. Valdany; Yudi N Ihsan; Lintang PS Yuliadi; Noir P Purba
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.912

Abstract

This research aimed to observe the trend of acidity, nitrate, and phosphate in the Indonesia seas associated with oceanography. Analysis was done by looking at the horizontal condition from main data (acidity, nitrate, and phosphate) and ancillary data (temperature) seasonally in three-layer of depths (0 m, 50 m, and 100 m) for years 2015 using data model of INDESO. The result showed that pattern of acidity, nitrate, and phosphate vary every season. In the upper layer (up to 100 meters), acidity condition ranges from 7.5 to 8, nitrate around 0.01 – 15 mmol N m-3, and phosphate around 0.001 – 1.6 mmol P m-3. The value of acidity is getting lower with depth whereas the nitrate and phosphate values increased with depth. The change in acidity, nitrates and phosphate every season indicates that the monsoon also influences the spread of pH, nitrate and phosphate.Keywords: ocean currents, Indonesia throughflow, sea surface temperature, climate changehate. 
Susceptibility of three indigenous Indonesian fish species: mahseer (Tor soro), snakehead (Channa striata), and bagrid catfish (Hemibagrus nemurus) against parasites infection Tuti Sumiati; Taukhid Taukhid; Septiyan Andriyanto; Edy Farid Wadjdy
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.1000

Abstract

Abstract Mahseer "dewa" (Tor soro), snakehead "gabus" (Channa striata), and bagrid catfish "baung" (Hemibagrus nemurus) are local specific fish species that are promising to be developed as freshwater aquaculture commodities in Indonesia. Disease cases/outbreaks in those fish farming have often been reported, however, there is not much information on the epizootiology and disease status of those fish species. The susceptibility of those fish to parasitic infection was evaluated by natural and artificial infection. Natural infection was conducted by randomly sampling 20 fish at 5-day intervals and lasting for 30 days. In artificial infection, 150 tested fish cohabited with 40 parasite-carrying fish that were known to be definitely infected by the parasite. The observation was carried out by sampling 20 fish at 5-day intervals and lasting for 30 days. The results showed that the three fish species were susceptible to infection with Trichodina spp, Epistylis spp, Tetrahymena spp, Ichtyophthirius multifiliis, Dactylogyrus spp, and Gyrodactylus spp, while the helminth parasite Pallisentis nagpurensis (Acanthocephala) was only identified in snakehead. A number of parasites such as I. multifiliis, Dactylogyrus spp., and Gyrodactylus spp. are likely to be potential obstacles in the cultivation of those fish species, especially in hatcheries and nurseries. Keywords: mahseer, snakehead, bagrid catfish, parasites
Mapping of Mangrove Ecosystem In Segara Anakan Lagoon using Normalized Different Vegetation Index and Dominant Vegetation Index Endang Hilmi; Lilik Kartika Sari; Arif Mahdiana; Teuku Junaidi; Muslih Muslih; Sesilia Rani Samudra; Norman Arie Prayogo; Muhamad Baedowi; Tri Nur Cahyo; Rifky Raihady Danu Putra; Fitra Amalia Sari
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.926

Abstract

Mangrove ecosystem in Segara Anakan Lagoon (SAL) Cilacap as a typical and specific semiclosed estuary. SAL  is dominated by many species like as Rhizophora spp., Sonneratia spp., Bruguiera spp., Avicennia spp., and other species. The normalized different vegetation index (NDVI) and dominant vegetation index (DVI) are a suitable method to support the mapping analysis of mangrove structure and mangrove density.  This research aimed to develop mapping of mangrove species distribution, density and dominated species using NDVI and DVI.  The method of this research used NDVI analysis using satellite imagery 2017-2020 and domination vegetation with line and quadrat transect method. The results showed that  West Segara Anakan had mangrove dense (25 %), moderate density (25 %), rare density (50%) and East Segara Anakan had mangrove dense (43,86 %), moderate density (47.99 %), rare density (8,24 %).  Based on domination species showed that East Segara Anakan was dominated by Rhizophora stylosa (233-1633 trees ha-1), Rhizophora apiculata (100-1067 trees ha-1), Nypa frutican (50-2775 trees ha-1), whereas West Segara Anakan was dominated by Nypa frutican (565-2333 trees ha-1), Avicennia marina (198-933 trees ha-1), Sonneratia caseolaris  (132-700 trees ha-1) and Avicennia alba (107-1000 trees ha-1). Keywords : Mangrove density, mapping analysis, Segara Anakan Lagoon, NDVI and NDWI
Environmental DNA Metabarcoding Reveals the Eukaryotes Diversity in Marine Protected Area of Lombok Island, Indonesia Arief Pratomo; Dietriech Geoffrey Bengen; Neviaty Putri Zamani; Hawis Madduppa
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.1009

Abstract

Biodiversity assessment surveys are necessary for establishing conservation areas. However, such surveys are typically expensive, primarily if they cover a large area and take a long time. The survey difficulty increases when applied to cryptic, sparse, and fast-moving organisms. In addition, it requires expertise in taxonomic-biota classification. The breakthrough environmental DNA (eDNA) metabarcoding technique promises to overcome all the hurdles of assessing the potential for marine biodiversity in a non-invasive, rapid, extensive, and more effective way. We evaluated the ability of the eDNA survey to reveal the potential diversity and character of marine eukaryotes in the Lombok Island Marine Protected Area. A sampling of seawater and sediment eDNA in pore size fractions of 0.4-12 ?m and >12 ?m was carried out in the Core Zone, Non-Core Zone, and Non-Conservation Area, in east, north, and west Lombok, respectively. The detection and classification of eukaryotes using bioinformatics analysis were accomplished following extraction, amplification, and DNA sequencing. We identified 20,478 unique sequences of potential species classified in five kingdoms to 654 marine eukaryotes families. The comparison results show differences in community structure between locations, as well as differences in diversity between media and factions. The eDNA survey can assess marine biodiversity at a macro level and has implications for management in conservation areas.Keywords: Biodiversity, Marine eukaryotes, environmental DNA, the Primary V9-SSU 18S rRNA gene
The Suitable Sites for Seagrass Transplantation in Lae-Lae Island and Sandbar According to Sediment Characteristics Mahatma Lanuru; Priska Bungaran Patandianan; Caesar Islami Wahidin; Permatasari Permatasari
Journal Omni-Akuatika Vol 18, No 2 (2022): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2022.18.2.956

Abstract

The success of a seagrass transplantation effort depends on identifying locations with optimal sediment characteristics for seagrass growth and survival. This study analyzed sediment characteristics of seagrass bed sediment and adjacent unvegetated sediment on Lae-Lae Island and Lae-Lae sandbar (Makassar, South Sulawesi) to determine the suitable sites for seagrass transplantation. Seagrass bed sediments and adjacent unvegetated sediments were collected from four locations to measure sediment particle size, redox potential, organic matter, water content, nitrate, and phosphate concentrations. Analysis of similarities (ANOSIM) was performed using PAST (Paleontological Statistics) software to determine a suitable site for seagrass planting (transplantation). The results show that surface sediments in the Lae-Lae island are composed of medium sand and coarse sand with grain sizes varying from 0.290 to 0.768 mm, whereas in the Lae-Lae sandbar, the sediment is composed of medium sands (0.371 – 0.460 mm). Redox potential (Eh) varied from -34.1 to -65.7mV, water contents were 1.3 to 1.8%, organic contents were 19.85 to 38.53%, nitrate content varied from 0.60 to 3.47, and phosphate content varied from 7.42 to 14.19 ppm. The percentage of mud (clay and silt) and organic matter were slightly higher in seagrass bed sediments compared to unvegetated area sediments. No differences in nutrient contents (nitrate and phosphate) between seagrass sediments and unvegetated were observed in this study. ANOSIM results show no difference in the sediment characteristics between a seagrass bed and unvegetated sand at the north and south sides of Lae-Lae Island and Lae-Lae sandbar, which means that these three sites are suitable for seagrass transplantation.Keywords: sediment, seagrass, transplantation, site selection, ANOSIM, Lae-Lae  

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