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ILMU KELAUTAN: Indonesian Journal of Marine Sciences
Published by Universitas Diponegoro
ISSN : 08537291     EISSN : 24067598     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
ILMU KELAUTAN: Indonesian Journal of Marine Sciences (IJMS) is dedicated to published highest quality of research papers and review on all aspects of marine biology, marine conservation, marine culture, marine geology and oceanography.
Arjuna Subject : -
Articles 8 Documents
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Search results for , issue "Vol 28, No 2 (2023): Ilmu Kelautan" : 8 Documents clear
Role of Natural Food in Enhancing the Productivity of Saline Nile Tilapia in the Mangrove Ecosystem of Segara Anakan Lagoon, Brackish Water Culture Petrus Hary Tjahja Soedibja; Endang Hilmi; Isdy Sulystio; Florencius Eko Dwi Haryono; Hanan Hassan Alsheikh Mahmoud
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.125-135

Abstract

Saline Nile Tilapia, Oreochromis niloticus (Linnaeus, 1758) and Milkfish, Chanos chanos (Forskal, 1775) polyculture systems in brackish water culture require natural food to sustain their brackish water fish production. Brackish water culture of Saline Nile Tilapia is developed to improve the productivity of abandoned shrimp or crab pond. At present, there are no studies examining the potential of natural food to improve the productivity of these polyculture systems in the brackish water pond located in Tritih Kulon Village, Cilacap, Central Java. To assess the availability of this food source, the diversity and abundance of plankton in the water body were evaluated through analysis. Therefore, this study aimed to analyze plankton diversity in the water body and the relationship between plankton abundance as a natural feed and saline Nile Tilapia productivity in the brackish water polyculture. Phytoplankton and zooplankton were identified according the plankton characteristic available in the references. The results showed that 21 planktons, comprising 12 phytoplankton species and 9 zooplankton groups, were identified. In spite of low plankton diversity, however, this study proved that the plankton abundance positively supported Saline Nile tilapia productivity in the polyculture system with milkfish, as indicated by low mortality (17,5 ±8,59 %; R2= 0.825-0.908), absolute high weight gain (208.2 ± 22,5 gr; R2= 0.881-0.874), and high specific growth (2,28 ± 0.77 % day-1; R2= 0.87-0.91). The productivity of Saline Nile Tilapia in brackish water polyculture with milkfish is supported by the availability of natural food, with 5.95 to 18.50% of their gut content obtained from plankton.
Molecular Identification and Biotechnological Potential of Cerithidea cingulata-and Lottia scabra Associated Fungi as Extracellular Enzyme Producer and Anti-Vibriosis Agent Agus Trianto; Ocky Karna Radjasa; Subagiyo Subagiyo; Armeilia Ardiva Isabella; Muhammad Syaifudien Bahry; Hartuti Purnaweni; Rignolda Djamaludin; Aiyen Tjoa; Ian Singleton; Darren Mark Evans; Karen Diele
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.136-147

Abstract

Mangroves are complex, unique, and dynamic ecosystems that host organisms that have special physiological adaptations to fluctuations in salinity, temperature, and pH. Gastropods have an important role in the mangrove ecosystem for food cycles and webs by helping to provide nutrients and micro-habitats for microbes.  Micro-fungi isolated from mangrove ecosystems are productive sources of enzymes and bioactive compounds such as antibacterial and antifungal. In this study a explored the enzymatic and anti-vibrio activity of fungi associated with the marine gastropod Cerithidea cingulata and Lottia scabra. collected in three mangrove forests in North Sulawesi, Indonesia.  The fungi associated with the specimens were inoculated on malt extract agar (MEA) using the tapping method. Enzymatic and anti-vibrio assays were conducted applying the plug method. Positive effects of the fungal compounds on Vibrio  were indicated by  clear zones formed around the isolates.  A total of 13 fungal species were isolated from C. cingulata (19MB-C5  and 19MBa-A4) and L. scabra (19MT-07 and 19MT-18).  Most fungal isolates have moderate growth rate. The isolate with highest cellulolytic, proteolytic, and anti-vibriosis activity (Vibrio parahaemolyticus, V. harveyi, V. vulnificus, and V. alginolyticus), derived from C. cingulata 19MB-C5 was closely related to Aspergillus niger, as revealed by molecular analysis using the universal primers ITS1 and ITS4 (similarity value 99%).  A. niger 19MB-C5-3 has potential as a bioremediation and anti-vibrio agent that can be applied in aquaculture.
Sex Changes and Gonad Maturity of Rivulated Parrotfish Scarus rivulatus (Valenciennes, 1840) from Seribu Islands, Indonesia Asri Yanti; Sulistiono Sulistiono; Ali Mashar; Sonja Kleinertz
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.203-216

Abstract

Parrotfish (Scarus rivulatus) is a species that can undergo sex change at a certain age and size (hermaphrodite protogynous). This study aims to analyze the process of sex change based on body color and gonadal tissue changes, as well as the gonadal development of the fish. Sampling was conducted monthly from January to September 2022. Fish samples were collected from fishermen in Seribu Islands. The parameters observed were sex, gonad maturity stage, body color changes, and anatomy and histology of the gonad. The samples were 1605 individuals, consisted of 831 females, 309 primary males (initial phase of males), and 465 secondary males (terminal phase of males). The total length of these fish ranged 8.8- 22.4 cm (females), 10.5-22.6 cm (primary males of males), and 15.1-28.1 cm (secondary males). Morphological differences between female fish, primary males, and secondary males are generally showed in body size, fin size, and body coloration. The histological analysis results of the gonads of primary male fish was indicated by the presence of residual perinucleolar oocytes in the layer of the gonads that coexist with sperm tissue. The body size of first mature gonads was 13.0 cm (female), 16.6 cm (primary male), and 17.6 cm (secondary male). Gonadal maturity stage (GMS) III and IV dominated each observation time. Hence, it was suspected that the fish spawned throughout the year.  However, based on the distribution of the GMS, there was an increase in reproductive activity in January-March and July-September, with peak spawning in March and September.
Species Identification among Fish Samples taken from Mangrove Ecosystem in Lampung Coastal Bay through DNA Barcoding Technique Yanti Ariyanti; Ika Agus Rini; Novriadi Novriadi; Fidya Septiana
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.173-180

Abstract

Mangrove forests are essential for supporting the habitats of numerous fish species, some of which are vital for local economies. These forests serve as breeding and nurturing environments for fish, providing a safe haven for juvenile fish and protecting them from predators and environmental stressors. There are many different species of fish that use mangrove forests as a breeding and nursery ground. Although many studies on the biodiversity of mangrove organisms on Sumatra Island exist, data on fish species diversity in Lampung Bay is still lacking. Morphological identification is often inadequate to distinguish between potential fish species, even across different life stages such as adults, juveniles, or larvae. However, DNA barcoding has the potential to identify species at any developmental stages accurately. Thus, this study aimed to identify and confirm fish species originating from the mangrove ecosystem in Lampung Bay specifically the Sebalang Mangrove Ecopark (South Lampung) and Petengoran Mangrove Forest, Gebang Village (Pesawaran), through a molecular approach using DNA barcoding techniques. Twenty samples can be identified at the species/genus level, demonstrating that using short, standardized genetic region Cytochrome c oxidase I (COI) mitochondrial gene sequences can accurately and quickly classify fish samples. Furthermore, twenty mitochondrial DNA sequences of various fishes have been submitted to the massive genetic database, GenBank. By identifying species accurately and quickly, DNA barcoding can improve the knowledge about fish biodiversity especially samples taken from the mangrove ecosystem in Lampung Coastal Bay.
Supplementation of Carrageenan (Kappaphycus alvarezii) for Shrimp Diet to Improve Immune Response and Gene Expression of White Shrimp (Litopenaeus vannamei) Ichoun Brawici Dhewang; Ervia Yudiati; Subagiyo Subagiyo; Rabia Alghazeer
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.161-172

Abstract

White shrimp (Litopenaeus vannamei) is one of the leading commodities in aquaculture. In recent years, the shrimp farming industry worldwide has suffered heavy losses due to disease. Increasing the immune system in shrimp using immunostimulants that are more environmentally friendly such as carrageenan from Kappaphycus alvarezii, seems promising. The purpose of this study was to determine the increase in immune response and gene expression in White shrimp after carrageenan supplementary diet treatment. This research was using a laboratory-scale experimental method with a factorial Completely Randomized Design (CRD) which was analyzed using One Way ANOVA. The treatments were negative control (without carrageenan addition), 5 g.kg-1, 10 g.kg-1, 15 g.kg-1, and 20 g.kg-1 carrageenan supplemented feed. All treatments were replicated three times. 180 L. vannamei with average weight of 6.5±0.66 g is used for research object Total Haemocyte count (THC), Phenoloxidase (PO), Superoxide Dismutase (SOD) activity, and Phagocytic activity/Index (PA/PI) were examined after feeding the White shrimp with diets supplemented with carrageenan in time series sampling. Immune-related gene expression (Lipopolisaccharide Glucan Binding Protein/ LGBP, Pro Pehnol Oxidase/ ProPO, and Lectin Type C/ Lectin) was evaluated by quantitative Real-Time PCR (qRT-PCR) at the end of experiment. Results indicated that the immune parameters directly increased according to the doses of carrageenan and time. The 20 g.kg-1 carrageenan treatments gave better results. three immune-related genes expression i.e LGBP, Lectin, and proPO were upregulated.  Therefore, carrageenan supplementation of shrimp feed can improve innate immunity as well as the expression of immune-related genes.
Insecticidal Activity and Phytochemical Profiles of Avicennia marina and Excoecaria agallocha Leaves Extracts Rozirwan Rozirwan; Muhtadi Muhtadi; Tengku Zia Ulqodry; Redho Yoga Nugroho; Nadila Nur Khotimah; Fauziyah Fauziyah; Wike Ayu Eka Putri; Riris Aryawati; Che Abd Rahim Mohamed
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.148-160

Abstract

Toxic bioactive compounds can be obtained from various mangrove plants that have the potential to be developed in agriculture as bioinsecticides. The coast of South Sumatra has relatively abundant Avicennia marina and Excoecaria agallocha vegetation. This study was conducted to analyze the bioactivity of insecticides and the phytochemical profiles of mangrove leaves A. marina and E. agallocha was extracted with methanol, ethyl acetate, and n-hexane from the most toxic extract fraction. Samples were obtained from the Barong River in Sembilang National Park, Banyuasin Regency. The insecticidal activity of the samples was carried out on Gryllus bimaculatus and Tenebrio molitor. Furthermore, the phytochemical profile was analyzed using GC-MS. Based on the results of insecticidal activity on G. bimaculatus, the respective LC50 values of A. marina and E. agallocha extracts for the hexane fraction were 12,562 mg.L-1 and 15,464 mg.L-1, ethyl acetate 9,986 mg.L-1 and 10,292 mg.L-1, methanol 6,454 mg.L-1 and 6,969 mg.L-1. Whereas in T. molitor, the LC50 values for the hexane fraction were 10,682 mg.L-1 and 11,070 mg.L-1, ethyl acetate 9,065 mg.L-1 and 9,269 mg.L-1, methanol 4,799 mg.L-1, and 5,408 mg.L-1. The results of GC-MS analysis on the methanol extract of A. marina leaves which contained phytochemical compounds such as alcohol, lauric acid, myristic, linoleic, elaidate, stearate, endogenous, olead, phthalic ester, and siloxane. Based on the insecticide toxicity category, the insecticidal activity of both A. marina and E. agallocha leaves extracts were low and non-toxic. Further research is needed regarding variations in anti-insecticide of mangrove extract measurements in the future studies.
Tidal Characteristics for Disaster Preparedness in the Port Area (Case Study: Port of Semarang, Central Java) Nurkhalis Rahili; Buddin Al Hakim; Danang Ariyanto; Eny Cholishoh; Aprijanto Aprijanto; Destianingrum Ratna Prabawardani; Tjahjono Prijambodo; Gugum Gumbira
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.181-188

Abstract

Tanjung Emas Port, Semarang, is vulnerable to hydrometeorological disasters and tidal flooding due to tides and rising sea levels. The tidal flood also impacts human activities and industrial operations around the coastal area. Several measures have been taken to make the community resilient to tidal flooding and adapt to this disaster. A tidal flood happened in Semarang from May to June 2022 with a flood height of up to 210 cm. This incident disturbed the primary port operations, with more than 75% of the port area full of water. The total loss was estimated up to IDR 615 billion. Many factors influenced this incident, such as the rising sea levels due to global warming, tides, and other atmospheric conditions, causing weather anomalies. This study aims to compare and validate Geospatial Information Agency (BIG) tide data with Meteorological, Climatological, and Geophysical Agency (BMKG) tide data using three kinds of statistical test, that are mean relative error (MRE), root mean square error (RMSE), and mean absolute error (MAE). Also, to conduct tidal analysis using 11 years of tide data measurement to know the tide's characteristics in Semarang's coastal area. The result will be used to provide input for strategic steps and preparation for disaster preparedness that will occur in the near future. Tide data analysis using MIKE21, the IOS method. The result shows data comparison error < 5% and a Formzahl value of 1.797 with the type of tide mixture prevailing diurnal and the change of water level up to 10 cm.y-1.
Evaluating the Accuracy of BMP280 and BME280 Sensors for Sea Level in a Coastal Environment: A Field Study at Tanjung Siambang Pier Hollanda Arief Kusuma; Yuliani Yuliani; Tonny Suhendra; Dhanushka Devendra; Dwi Eny Djoko Setyono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.189-202

Abstract

Monitoring sea level is important for assessing climate change impacts, coastal management, and predicting hazards. Accurate measurements of air pressure is essential for precise sea level monitoring through pressure-to-altitude conversion. Additionally, understanding tidal patterns and their dominant components is crucial for comprehensive sea level analysis. This research aimed to investigate the accuracy of BMP280 and BME280 sensors in measuring air pressure and altitude to monitor sea level. Comparing air pressure data from the BMP280, BME280, and BMKG sensors showed that the BMP280 sensor had a higher accuracy than the BME280 sensor. Linear regression was used to decrease the error value. After calibration, BME280 and BMP280 did not differ with the BMKG sensor using one-way ANOVA and Tukey test. A field test was also conducted to assess the ability of the BMP280 sensor to measure sea level height from air pressure conversion. It was found that the BMP280 sensor could not provide an accurate sea level height value with an R² value of 0.00931. A Fourier analysis was used to investigate the tidal pattern in Tanjung Siambang using six constituents, symbols S1, O2, M2, S2, S4, and S6, with periods of 24, 12.91, 12.42, 12, 6, and 4 h. It revealed that the dominant components were M2 and S2, caused by the moon's and the earth's gravitational pull. This study highlights the limitations of the BMP280 sensor in providing accurate sea level height measurements and the importance of the M2 and S2 tidal components in determining sea tides in Tanjung Siambang.

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