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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 290 Documents

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Potensi Senyawa Bioaktif Ekstrak Kasar Bakteri Simbion Spons sebagai Anthelmintika : Sebuah Uji Pendahuluan Muhammad Reza Faisal; Mujizat Kawaroe; Fadjar Satria
Journal Omni-Akuatika Vol 10, No 2 (2014): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

This study aims to observe the bacterial symbionts of sponge and determine chemical compounds profile in the crude extract of bacterial isolates then to determine the lethal toxicity values (LC50-24 hours) as a preliminary anthelmintic test. The method consisted of the identification of gram staining, organic solvent extraction, phytochemical screening and toxicity assay by the Artemia salina LC50-24 hours. The concentration used consisted of 10 µg / ml; 100 µg / ml; 250 µg / ml; 500 µg / ml. Results showed isolate SC12 (2) C and S1-2 (1) belonging to the gram-positive where the bioactive compounds i.e. flavonoids and triterpenoids obtained from the crude extract were predominant. The minimum concentrations from toxicity tests were 35.11 µg/ml for isolate SC12(2)C and 41.2 µg/ml for S1-2 (1). The crude extract of both isolates showed potential as a anthelmintic compound with concentration LC50-24 hours <1000 mg/ml.Keywords : Bacterial symbionts sponge, S12(2) C, S1-2 (1), Phytochemicals, toxicity, Anthelmintic.

Pemetaan Habitat Ruaya Benih Ikan Sidat (Anguilla bicolor) dan Potensinya di Pantai Selatan Jawa Haryono Haryono; Gema Wahyudewantoro
Journal Omni-Akuatika Vol 12, No 3 (2016): Omni-Akuatika Special Issue Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The eels is fish commodities that interesting and prospective for cultured. For the fish fry supply stillrely on catches of wild nature, one of them the south coast of Java. But the these habitat andabundance not yet to mapping The aims of this study to assess the conditions migration habitat ofglass eel, abundance, identification of threats, and conservation efforts. The study used surveymethods, glass eel catched with hand nets size 1 x 1 m, catching at night each 2 hours, thenumber of fisherman are three peoples. The results of the study recorded nine rivers and four ofthem potential as migration habitat of eels, habitat conditions are still good, the highest abundanceis Cibuniangen river in the rainy season, the daily abundance was fluctuated and the highest at3:00 a.m, identified several threats, conservation need integrated effort.Keywords: eels, habitat, abundance, conservation

Growth Performance of Nile tilapia Immersed in 17α-methyltestosterone and rElGH, and Fed a Diet Enriched with rElGH Muhammad Safir; Alimuddin Alimuddin; Mia Setiawati; Muhammad Zairin Junior; Muhammad Agus Suprayudi
Journal Omni-Akuatika Vol 13, No 2 (2017): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The aim of the present study was to investigate the growth performance of Nile tilapia immersed in 17α-methyltestosterone (MT) and recombinant giant grouper growth hormone (rElGH), and fed a rElGH-enriched diet. A total of 200 tilapia larvae aged 10 days and 14 days post hatching was immersed in 1 liter of 30 g/L saline water for 3 minutes, then in freshwater containing either MT, MT+rElGH, or rElGH for 4 hours. The MT dose was 2.0 mg/L and rElGH was 2.5 mg/L. As control was treatment without MT and rElGH. Fish were maintained in 250-L aquariums for 6 weeks and then moved to net cages for 8 weeks of rearing. The rElGH-enriched diet was fed to the 6-week-old fish for a month, and then fed a non-enriched diet. Each treatment was triplicates. The result showed that the daily growth rate (DGR), biomass gain (BM), survival (SR) and feed (artemia nauplii) consumption during maintenance in the aquariums in the rElGH and MT+rElGH treatments were higher (P<0.05) than in the control. The higher DGR and BM at net cage rearing and lower feed conversion ratio (P<0.05) were also found in MT and MT+rElGH treatments. None of the treatments showed any difference in survival (P>0.05). Profits estimation in the MT and MT+rElGH treatments were 63.38% and 57.91% higher than the control. The present study concluded that higher Nile tilapia farming performance could be obtanied by MT immersion in the larval phase and feeding juvenile on the rElGH-enriched diet.

PENDUGAAN TINGKAT KONTAMINASI LOGAM BERAT PB, CD DAN CR PADA AIR DAN SEDIMEN DI PERAIRAN SEGARA ANAKAN, CILACAP Nuning Vita Hidayati; Asrul Sahri Siregar; Lilik Kartika Sari; Gayuh Laksana Putra
Journal Omni-Akuatika Vol 10, No 1 (2014): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

A study was carried out to investigate the concentrations and contamination levels of heavy metals in the sediments of Segara Anakan, Cilacap for three heavy metals (Cd, Pb, and Cr). sediments samples were collected from six sites during February 2013. The samples were analyzed to determine their heavy metals, pH and total organic carbon (TOC) content. Environmental assessment of sediments pollution by heavy metal was carried out using Contamination Factor (CF), Enrichment Factor (EF) by comparing to CCME, ANZECC and NOAA targets for sediment quality Guidelines. The results of this simple comparison revealed that, the Segara Anakan sediment concentrations of heavy metals are within the permissible limits of standards for Pb. CF value of Pb, Cd, and Cr (0.86, 10.8, dan 3.3) indicated no contamination for Pb (0.86), very strong contamination for Cd (10.8), and moderately to strong contamination for Cr. Calculated EF of the Pb, Cd, Cr in sediment were 1.50, 18.8, dan 5.7 indicating deficiency to low enrichment for Pb anrophogenically, and significant enrichment for Cd and Cr. According to the CF and EF value, Segara Anakan may face a severe heavy metal pollution contamination problem in the future.Keywords: sediments, contamination, anthropogenic

Identifikasi Kerang Kapah Di Pantai Timur Pulau Tarakan Abdul Jabarsyah; Takeshi Arizono
Journal Omni-Akuatika Vol 12, No 2 (2016): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

We identified the species of “kerang kapah” (hard clam) using the Gel Electrophoresis SDS Page, inorder to clarify the species of kerang kapah those found living along the East Coast of TarakanIsland. The study was conducted from July to December 2014. The kerang kapah were collectedfrom the several parts of East Coast Tarakan Island. Eight group samples of kerang kapah were used for Gel Electrophoresis SDS Page and scanned using the IMAGE software. Generally, thekerang kapah those found at the shouth part of East Coast of Tarakan Island have very similarmorphologies and shell colors, making species identification difficult. Four species of kerang kapahwere identified. Three species belong to Veneridae and one species belong to Corbiludae. Thespecies of Veneridae were Meretrix meretrix, Meretrix lyrata, and Meretrix sp. The species karangkapah belong to Corbiludae is Polymesoda erusa.Keywords: kerang kapah, meretrix, polymesoda, gel electrophoresis.

Synodontis eupterus Larvae Masculinization Using Javanese Long Pepper Extract (Piper retrofractum) Prassetyo Dwi Dhany Wijaya; Muhammad Zairin Junior; Dinar Tri Soelistyowati; Widanarni Widanarni
Journal Omni-Akuatika Vol 13, No 1 (2017): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Synodontis eupterus male represents only 5-10 % of farmer total synodontis production, which limits male availability for reproduction purpose. A method widely used in overcoming the low male production was masculinization through synthetic hormones, which was restricted due to its adverse impact on the environment. Natural ingredients from plant were demonstrated in various studies to substitute the 17α-methyltestosteron hormone on masculinization. This research aimed at evaluating the effects of Javanese long pepper extract (JLP) through immersion on synodontis fish larvae. The research was conducted using factorial design with two faktor (4x2) consisted of eight treatments: 17α-methyltestosteron 2 mg L-1 (MT) immersion for 5 and 10 hours, JLP dose 0.125 mg L-1 (P1) immersion for 5 and 10 hours and dose 0.25 mg L-1 (P2) immersion for 5 and 10 hours compared to the control treatment without immersion (P0). A hundred of synodontis larvae of 10 days old after hatching each replication were used in the immersion treatments. The results showed that JLP treatments produced 25-40 % of male synodontis age four months, 1-2 % females and above 60 % intersex. While at age five months, the percentage of intersex fish decreased to 20-40 %, the female fish increased to 60-62 %, and male fish ranged 20-35 % in JLP compared to the control P0 (15 %). The dose of JLP 0.25 mg L-1 increased mortality of about 14-54 %.

KARAKTERISTIK GELOMBANG SIGNIFIKAN DI SELAT KARIMATA DAN LAUT JAWA BERDASARKAN RERATA ANGIN 9 TAHUNAN (2005-2013) Sigit Wicaksana; Ibnu Sofian; Widodo Pranowo
Journal Omni-Akuatika Vol 11, No 2 (2015): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Karimata strait and the java sea is one of the most densely shipping lanes in the maritime country of Indonesia. Information of a significant wave is needed to safety navigation. The prediction of a significant wave mostly employs the modeling using wind as input data to produce an early warning warning prediction. Characteristic of a significant wave shows the maximum wave height in the strait and the java sea karimata occurs in west monsoon (January) and east season (August) every year. Especially at the peak of west monsoon (January) maximum wave height reach 1.5-3 meters in Karimata Strait, and reach 0.5-2.5 meters in Java Sea. The frequency of significant wave occurences mostly extend until February, where wave height in Java Sea will stay the same (0.5-2.5 meters), while in Karimata Strait is little bit decrease (1-2.5 meters). Recommended to all sea transportation users, in those regions during January and February, to avoid using ship with the hull is less than 3 meters height.Keywords: significant wave characteristic, Karimata Strait, Jawa Sea, Wind, Modeling

Observation of Wild Seaweed Species in Labuhanbua Waters, Indonesia: a preliminary assessment for aquaculture development Erlania Erlania; I Nyoman Radiarta
Journal Omni-Akuatika Vol 13, No 1 (2017): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Seaweed industry has been growing up and is supplied by either wild or cultivated seaweed crops. This study was aimed to present relevant information regarding ecological availability of wild seaweed in Labuhanbua coastal waters, Sumbawa Regency, West Nusa Tenggara and potential use of important species as candidate species for aquaculture. 46 sampling stations were determined along line transects perpendicular to coastal line; and seaweeds sampling were conducted during low tide by using 1 x 1 m2 quadrat transect. Field data consist of in-situ parameter including number of seaweed species and coverage area of each species; and ex-situ parameters consist of carbohydrate, protein, total C, total N, and total P content of seaweeds. The results showed that 33 species were found and three species has the most widely distribu tion, i.e. Padina sp., Dictyota dichotoma, and Gracilaria salicornia. Turbinaria, Dictyota, Padina, Stoechospermum, Hydroclathrus, Halimeda, and Chaetomorpha might be some important species that could be develop as aquaculture species candidates among other uncultivated species that were found along this study location. They have potencies as human food, livestock feed, neutraceuicals, cosmetics, pulp, textile, biofuel and any other industries; but conversely, they were found in lower density at Labuhanbua coastal waters. These species should be develop through aquaculture technology, involve genetic improvement and possibly genetic engineering. Commercial scale cultivation of those important seaweed species will contribute to industrial needs and prevent decreasing of wild seaweed availability in natural ecosystem.

Distribution, Condition and Gonad Maturity of the Invasive Pacific Oysters (Crassostrea Gigas, Thunberg 1793) in Cimanuk Delta, Indramayu, West Java, Indonesia Selia Hermawati; Sulistiono Sulistiono; Agustinus M Samosir
Journal Omni-Akuatika Vol 13, No 2 (2017): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Pacific oyster (Crassostrea gigas) is an invasive species which is able to adapt a wide range of environmental conditions. The study was conducted from August to October 2014. Objective of this study was to asses the distribution pattern, condition and gonad maturity length (Lm 50%) of the Pacific oysters in mangrove ecosystem of Cimanuk Delta, Indramayu, West Java, Indonesia. This study was conducted in two adjacent areas: Pabean Ilir and Pagirikan subdeltas. The oysters were collected from the estuary, brackish water ponds and the coastal flat, and observed for their abundance, total length (mm) and weight (g). Morphological and histological methods were used to estimate the gonad maturity stage. Analysis were carried out to estimate distribution pattern and condition factor. According to the study, the Pacific oyster distribution pattern was clumped. The condition factor of the oyster was higher in the brackish water pond and estuary than in the coastal flat. The Pacific oyster was found in gonad maturity stage (GMS) I – IV. The oyster was hermaprodit protandry and had length maturity (Lm 50%) of 47,46-48,43 mm (male) and 75,27-75,50 mm (female).

Penguatan Modal Sosial Sebagai Upaya Pengembangan Ekonomi dan Kapasitas Rumah Tangga Nelayan Berkelanjutan di Desa Pangandaran Dandy E Prasetiyo; Firman Zulfikar; Siti Aisyah Ningrum
Journal Omni-Akuatika Vol 12, No 1 (2016): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

This research was conducted Pangandaran District, Pangandaran Regency. The purpose of this study was to analyze the existing social conditions and to performe system analyze of social capital to be used as a strategy to improve the economy and the capacity of households of fishermen. The data was collected through the secondary data obtained from goverment offices and primary data was generated from interviews with fishermen household, village governments, and institutions or social organizations associated with fishing. The research instrument used is Social Capital Assessment Tool (SOCAT). Data were analyzed using descriptive qualitative method. Social capital research was assessed based on the profession similarity. The results showed that social capital was presumably beneficial for fishermen households by boosting the economy level and welfare as well as their capacity building. Institutions or social organizations in the village of Pangandaran namely Business Group (KUB), the Regional Commissioner (Komda), Rukun Fisherman (RN), the Fishermen Association of Indonesia (HNSI), and the Village Unit Cooperatives (KUD). Institutions or institutional activity may stimulate the further development and productivity of the coastal community. As most of the coastal communities depend on the limited marine resources, social capital strengthening can be a promising approach for expansion and development of existing networks. The strategy can be applied was the involvement of other family members to participate on any form of institutional bodies dedicated for coastal community.Keywords : social capital, coastal, fishermen households

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Kab. banyumas,

Jawa tengah

INDONESIA