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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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PENENTUAN WAKTU PENGAMBILAN BENIH DAN DIET IKAN SIDAT (Anguilla bicolor Mc Clelland) DI SUNGAI SERAYU Setijanto Setijanto; Isdy Sulistyo; Eko Budianto
Journal Omni-Akuatika Vol 10, No 2 (2014): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The purpose of this study is to know when appropriate time to catch the fish and to observe dietary fish eel (Anguilla bicolor Mc Clelland) found at River Serayu. The information obtained is important for the cultivation of this species. Sampling is carried out at two stations upstream section (Bendung Gerak Serayu) employing method traps and downstream (river estuary) with opyok method. Replication is done 2 times a month for 1 year. The results showed that the elvers, juvenile and adults tend to get caught throughout the year and with a peak in July. Based on the study, the capture of eels in the River Serayu can be done throughout the year. Diet examination reveals that Polychaeta, benthic insects, Malacostraca, Pisces, and gastropods are food of eels. Polychaeta and benthic insects are the main food for eels with size of <30 cm, while the Malacostraca and gastropods are the main food for eels with size of > 30 cmKeywords : eels, River Serayu, diet, A bicolor

Nike (Awaous melanocephalus) Fishery and Mercury Contamination in the Estuary of BoneBolango River Aziz Salam; Femy M Sahami; Citra Panigoro
Journal Omni-Akuatika Vol 12, No 2 (2016): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Nike fish (Awaous melanocephalus) is a tiny-kind of fish harvested lunar-monthly in the estuary of BoneBolangoRiver in the City of Gorontalo. The fishing activity is showing steady increase recently as thecommodity finds its way to the international market. Fishermen are putting more efforts by escalating thecatching capacity of their gears. Meanwhile, mercury used by the artisanal and small-scale gold mining(ASGM) in the headwaters for amalgamation put another aspect to the A. melanocephalus fishery whenit wasted into the river down to the estuary. This paper describes A. melanocephalus fishery and thethreat of mercury contamination in the habitat and the fish itself. Field research was conducted in theestuary of Bone-Bolango River to observe the technology and methods of A. melanocephalus fishing.Samples of water and fish were taken for mercury content examination with Atomic AbsorptionSpectrophotometer (AAS). Secondary data on production and distribution were obtained fromgovernment offices. The result showed that the water and A. melanocephalus samples contain mercuryat levels exceeding the quality standards determined by government. Keywords: nike, mercury, food security, sustainable fishery

Biocapacity in the Gili Matra Region: A Spatial Assessment of The Carrying Capacity of Small Islands Fery Kurniawan; Luky Adrianto; Dietriech G. Bengen; Lilik Budi Prasetyo
Journal Omni-Akuatika Vol 13, No 2 (2017): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Spatial as a contributor to biological productivity and ecosystem services have not been considered in the sustainable development of small islands. The aim of this study to appraise biocapacity (BC) in the Gili Matra Islands to estimate the existing carrying capacity for sustainable development, and refines the current BC methodology that emphasizes the spatial aspects in small islands. Based on analysis results, the Gili Matra Islands have BC total ranging from 659.46 to 1,069.57 gha in 2010, and increased from 673.64 to 1,093.02 gha in 2014. The highest total BC is the Gili Trawangan Island, while the lowest is the Gili Meno Island, but for the local BC is the opposite. The total local BC per island can be supplied around 0.00857 gha per capita for the Gili Ayer Island, 0.20103 gha per capita for the Gili Meno Island, and 0.00344 gha per capita for the Gili Trawangan Island. They are influenced by population density. The BC values indicate a critical position, both per-unit-area or per-capita, which is spatially nearly 100 % of the needs supplied from outside the island, and demonstrate the use on the Gili Matra Region have exceeded the existing carrying capacity. The sustainable development aspects and land use management should be applied strictly to ensure the sustainability of natural resources, social and economic, as well as cotinuously consider the efforts and existing strategies of conservation. The export and import factors of bioproductivity should be considered in making long-term planning. Spatially, BC appraisal was applicable to illustrate the condition of an area on the small islands. The GIS based BC can give the information of pattern of changes and distributions, both spatial and temporal. However, the statistical data use is needed to get the value of BC per capita.

KAJIAN SOSIO-EKOLOGIS KAWASAN MANGROVE DI PESISIR PANTAI KECAMATAN BIDUK-BIDUK, KALIMANTAN TIMUR Dandy E Prasetiyo; Ferbrian K Atmanegara; Firman Zulfikar; Hani S Purwanti
Journal Omni-Akuatika Vol 10, No 1 (2014): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The study aims to determine the existing condition of mangrove as well as to asses dependency of coastal communities to the mangrove system at districts Biduk-biduk, East Kalimantan. The primary data related to the mangrove condition was conducted using random sampling while sosio-ecology was taken through direct interviewing. The results obtained composition studies as many as 31 species of mangrove species consisting of 13 species of true mangrove and 18 species of mangrove associates, where the average value of the density of mangroves in the study site was 1489 individuals/ha. True mangrove species found in this study include Acathus ilicifolius, Aegiceras corniculatum, Brugueira gymnorhizza, B. parviflora, Ceriops tagal,Excoecaria agallocha, Lumnitzera racemosa, Rhizophora apiculata, R. mucronata, Scyphiphora hydrophyllacea, Sonneratia alba, Sonneratia lanceolata, Xylocarpus granatum. Social studies results obtained information that the level of utilization direct of mangrove forests by the communities in the districts Biduk-biduk was relatively low as they were aware with the mangrove functionnement ecologically.

Distribusi Ukuran Spasial-Temporal dan Berdasarkan Tingkat Kematangan Gonad Rajungan (Portunus pelagicus Linnaeus 1758) di Teluk Lasongko, Buton Tengah, Sulawesi Tenggara Abdul Hamid; Yusli Wardiatno; Djamar T.F. Lumban Batu; Etty Riani
Journal Omni-Akuatika Vol 12, No 2 (2016): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The aim of the study was to reveal spatial-temporal distribution of the blue swimming crab(Portunus pelagicus Linnaeus 1758) in terms of size and gonad maturity stage of both male andfemale. Sampling of crab was conducted with a gill net from April 2013 until March 2014 inLasongko Bay. Of the whole population the mean size of male was smaller than that of females.Spatially smaller crabs (juveniles and young ones) inhabited mostly inner side of the bay, whilemedium size crabs occurred in the middle part of the bay. Big crabs were mostly found in theouter side of the bay. In terms of time, big sise of male and female crabs were collected inperiod of October to November and September to March, respectively. Small size of male andfemale occurred in February to September and in April, respectively. Related to gonad maturity,the sizes of both sexes with mature stages were variable. Ovigerous female (OF) was presencewidely in the bay, but the size of ovigerous females living in the shallow part of the bay wassmaller than those living in the deeper part. Keywords: blue swimming crab, size distribution, carapace width, spatial-temporal, gonadmaturity

Coastal Acidification as Nutrients Over Enrichment Impact: A Case Study in Ambon Bay, Indonesia Idha Yulia Ikhsani; Donna Marselia Siahaya; Frilla Renty Saputra; Sem Likumahua
Journal Omni-Akuatika Vol 13, No 1 (2017): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Ambon Bay is a silled bay on Ambon Island consisting of two regions, Inner Ambon Bay (IAB) and Outer Ambon Bay (OAB) that are separated by shallow sill. Ambon bay and its surrounding have economically important ecosystem since the utilization for many activities. The bay is affected by anthropogenic impacts associated with urbanization, climate change, and nutrients over enrichment. The “deep water-rich nutrients” from Banda Sea that enter the bay during Southeast monsoon also contribute to this enrichment as well as the nutrients transport from the land. The high concentration of nutrients increases carbon dioxide level and promotes acidifications. There are literatures about nutrients over enrichment in Ambon Bay, however, little is known about coastal acidification as nutrients over enrichment impact. In order to study the effect of nutrients distribution on the acidity of Ambon Bay, the researchers measured pH and concentrations of nutrients {nitrate + nitrite (N+N) and Soluble Reactive Phosphate (SRP)} from water samples collected in 7 stations on both IAB and OAB during Southeast monsoon. The results showed that in surface water, nutrients concentrations is increased from May to June due to the “deep water flushing” occurrence on May and increased precipitations from May to June. From July to August, the nutrients concentrations on surface layer decreased, due to the decreased precipitations. In column and bottom water, the nutrients concentrations were increased from May to August. While the acidity have reverse pattern from the nutrients, when nutrient concentrations increased the acidity was decreased. From correlation test, pH was not significantly correlated with the concentrations of nutrients on surface water, but showed significantly correlated on column and bottom water. The results indicated that the distribution of nutrients on column and bottom water might be an important environmental factor affecting the acidification of the Ambon Bay in Southeast monsoon.

Cadmium Induces the Activation, Concentration, and Expression of MTF-1 Protein As a Biomolecular Response of Sea Urchins Deadema setosum Dominggus Rumahlatu
Journal Omni-Akuatika Vol 13, No 2 (2017): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Heavy metal cadmium has toxic effects in the bodies of living organisms.However, the bodies of living organisms have the ability to regulate a wide range of toxic entering the body by using biomolecular response that aims at maintaining cell homeostasis. In this research an induction of cadmium in sea urchins Deadema setosum was carried out. Cadmium was induced in 6 levels of concentration in six treatment groups of D. setosum. Each group consisted of 7 individuals.The examination of MTF-1 protein activation was carried out by immunohistochemical method, the measurement of MTF-1 protein concentration was carried out by the indirect ELISA method (Enzyme Linked Imunoasssay) and the examination of MTF-1 protein expression was carried out by western blotting method. The data were analyzed using descriptive analysis and One Way ANOVA followed by Duncan test 0.05 to determine the mean difference of MTF-1 protein concentration of D. setosum. The research results showed that cadmium induction activated MTF-1 characterized by the condition of liver cells of D. setosum which was brown.The higher the exposure of cadmium concentration on D. setosum, the higher the concentration of MTF-1 expressed

KEPADATAN DAN LAJU PERTUMBUHAN SPESIFIK Nannochloropsis sp. PADA KULTIVASI HETEROTROPIK MENGGUNAKAN MEDIA HIDROLISAT SINGKONG Mujizat Kawaroe; Tri Prartono; Ganjar Saefurahman
Journal Omni-Akuatika Vol 11, No 2 (2015): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Growth of Nannochloropsis sp. was observed in laboratory cultivation condition with enrichment of cassava hydrolysate into culture medium as follow : 25 ml microalgae strain, 75 ml seawater, without cassava hydrolysate (A); 25 ml microalgae strain, 25 ml cassava hydrolysate, 50 ml seawater (B), 25 ml microalgae strain, 50 ml cassava hydrolysate, 25 ml seawater (C). Cultivation condition was fixed as follow temperature 29°C, seawater pH 8, and salinity 30 ‰. Microalgae cultivation was performed at microalgae laboratory of Surfactant and Bioenergy Research Center using 100 ml Erlenmeyer covered by black plastic to prevent the influence of light. The specific growth rate of Nannochloropsis sp. was observed in 7 days for different cultivation medium composition. The highest density of microalgae was in the 4th days with 50ml cassava hydrolysate’s feeding (C treatment) about 172.661 cell/mL. The highest specific growth rate for Nannochloropsis sp. cultivation was observed in the 6th days without cassava hydrolysate’s feeding. Result of statistical analysis showed that different cassava hydrolysate’s feeding treatments (ml) in heterotrophically microalgae cultivation influenced the density of microalgae (cell/mL) but not influenced the specific growth rate of microalgae (per day).Keywords: Cassava hydrolysate, Density, Heterotrophic cultivation, Spesific growth rate, Nannochloropsis sp.

Sound Characteristics of Terapon Jorbua as Representation to its Behavior Amron Amron; Adi Lutfi Hanafi; Indra Jaya; Totok Hestirianoto; Karen von Juterzenka
Journal Omni-Akuatika Vol 13, No 1 (2017): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Types and characteristics of sound that produced by fish is a reoresentation to its behavior. Single click in certain characteristics is produced when terapon jorbua was rested, while multiple click that emitted when individual fish was interacted with others. Single frog which had a spectral intensity, frequency and duration that was greater than a single click was a representation to territorial behavior. Multiple frog that produced by individual fish was a representation to suffered attack from the other fish or as a defensive behavior

Identifikasi Penjalaran Gelombang Panjang Samudera Hindia Ke Selat Lombok Berdasarkan Komponen Harmonik Arus Yogo Pratomo; Widodo Setiyo Pranowo; Hendrawan Setiadi
Journal Omni-Akuatika Vol 12, No 1 (2016): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

The Lombok Strait is one area passing by seawater mass from Pacific Ocean to Indian Ocean, well known as Indonesia Through Flow (ARLINDO). It was profen by the existane of long periode harmonic current component affected by the sun (SA, SSA ) , and an influence by moon (MSF). The harmonic current speed has an average of 0.370668 m/s in the depths of 100 meters during January 9, 2004 until 14 June 2005 (1.5 years). Time series data ocean current of INSTANT project (2004-2005) is used in this research, analized by using toolbox module of t-tide 1.3 beta. The current rose at 350 meters deep and 450 meters deep shous pattern of the a unique ocean current, which mastly toward to north and northeast (55 %) with velocity at 0.2-1.0 m/s. The current is coming from Indian Ocean which proven by the existence of components like M4, MS4, MSF, O1. There is also ocean current toward to south and southwest as (45 %) with speed of 0.11-0.9 m/s. Thie ocean current which coming from Indian Ocean is indication of propagation of long wave penetration to Lombok Strait. During its propagation passing the sill, the wave become an internal wave in Lombok Strait.Keywords: internal wave, indian ocean, lombok strait, harmonic currents component, INSTANT 2004-2005

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Kab. banyumas,

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